latest change on laptop Bible and SDDownload

fix(LuaGame): fix render black screen, reduce stack to 8192, add exit gesture
- Init task stack 16384->8192 to avoid allocation failure (ret=-1) - Replace GAME_W/H constants with fb_w/h dynamic for fullscreen 320x480 - Fix l_renderer_clear and app_on_show fill to use dynamic dimensions - Add PSRAM Lua allocator already, conditional audio skip for solitaire saves RAM - Exit gesture: top-right 40x40 tap calls tt_app_stop(), game.exit() also stops app - Screenshot now shows solitaire cards: 810B PNG, 3662 non-black pixels, ASCII preview shows piles with optimized LEFT=4 GAP=4 TOP=4 TAB=60 (was 37/10/30/98) - Tested solitaire loads external 24430 bytes, pico=1, init OK, no memory low warnings after fix
2026-09-11 10:51:52 -04:00 · 2026-07-31 13:30:37 -04:00 · 2026-07-31 13:23:40 -04:00 · 2026-07-31 13:12:32 -04:00 · 2026-07-31 13:00:38 -04:00 · 2026-07-31 12:57:12 -04:00
107 changed files with 42633 additions and 1491 deletions
@@ -39,12 +39,6 @@ print(f"undef {len(undef)} missing {missing}")

 ### New missing from v2/v3/v4/v5 UI passes

- `device_get_by_name`, `device_get_first_by_type` (out-param API) → **Not exported** on flashed 0.8.0-dev (verified via serial on .129: `E ELF: Can't find symbol device_get_by_name`). The firmware exports the **legacy** `device_find_by_name` / `device_find_first_by_type` instead. Gotcha: newer SDK/CDN headers declare only `device_get_*` (so `device_find_*` fails to compile), but the flashed firmware only exports `device_find_*` (so `device_get_*` fails at load). Fix: call the exported legacy `device_find_*` and declare them locally in the app source since the SDK header dropped them:
-  ```c
-  extern struct Device* device_find_by_name(const char* name);
-  extern struct Device* device_find_first_by_type(const struct DeviceType* type);
-  ```
-  Verify the ACTUAL load on-device via serial (`/dev/cu.usbmodem*`, 115200) — `verify_symbols.py` compares against local firmware source and can report 0 missing even when the flashed firmware's export table differs.
 - `lv_obj_set_style_bg_grad_color/dir/stop` → **Not exported** 0.8.0-dev. Gradient fails `missing symbol`. Use solid `0x0E0E14`.
 - `LV_OPA_95` → **Not defined** (only 0/10/20/30/40/50/60/70/80/90/100/COVER/TRANSP). Use `COVER` or `90`.
 - `lv_arc_create`, `lv_arc_set_range/value/bg_angles`, `lv_arc_get_value` → **Not exported on 0.7.0-dev**, added `dff93cb6 Add lv_arc.h symbols (#496)` after 0.7 release. Symptom blue modal `Error / Application failed to start: missing symbol / OK`, heap healthy ~31KB not OOM. Fix horizontal slide using `lv_slider_create` + `lv_indev_get_point/active`. See `book-browser.md`.
@@ -9,42 +9,23 @@ Tactility external ELF apps — loaded at runtime via firmware symbol table. Eac
 Upstream: `https://github.com/TactilityProject/TactilityApps`
 Personal Gitea mirror: `https://git.reynafamily.com/adolforeyna/tactility_apps` (`personal` remote)

-Dev board IP: `192.168.68.112` (S3, OS 0.8.0-dev, SDK 0.8.0-dev) — main deploy target. `.111` and `.114` also online. OS image is 0.8.0-dev so manifest should use `sdk=0.8.0-dev` or loader warns.
+Dev board IP: `192.168.68.112` (S3, OS 0.8.0-dev, SDK 0.8.0-dev) — main deploy target. `.111` also online. OS image is 0.8.0-dev so manifest should use `sdk=0.8.0-dev` or loader warns.

 ## Local Workstation

- Host: macOS 26.5.2
- Project: `/Users/adolforeyna/Projects/electronics/tactility/tactility_apps`
- ESP-IDF: `/Users/adolforeyna/esp/esp-idf` (v5.5.2), Python env `idf5.5_py3.9_env` at `~/.espressif/python_env/idf5.5_py3.9_env` (NOT `idf5.3_py3.9_env` — that env does not exist on this machine)
-
-### Tactility SDK location (IMPORTANT)
-
- When you run `tactility.py ... build` **without** `--local-sdk`, it auto-downloads the SDK to the per-app cache:
-  `Apps/<Name>/.tactility/<version>-<platform>/TactilitySDK` (e.g. `Apps/BookPlayer/.tactility/0.8.0-dev-esp32s3/TactilitySDK`).
- **The freshly CDN-downloaded 0.8.0-dev SDK for esp32s3 is broken for this setup** — it fails at CMake with
-  `Failed to resolve component 'app-module' required by component 'TactilitySDK': unknown name` and also renames the
-  device API (`device_find_*` → `device_get_by_name/device_get_first_by_type` out-param style). It is a *different,
-  newer* SDK than the working one.
- **The known-good SDK is the locally-cached copy** already present in the other apps'
-  `.tactility/0.8.0-dev-esp32s3/TactilitySDK` (the one that carries a `Drivers/` folder). It builds clean.
- Workaround when a fresh download fails: copy the working cached SDK over the broken one:
-  ```bash
-  SRC=Apps/PipecatVoice/.tactility/0.8.0-dev-esp32s3   # known-good copy
-  DST=Apps/MyApp/.tactility/0.8.0-dev-esp32s3
-  rm -rf "$DST/TactilitySDK"; cp -R "$SRC/TactilitySDK" "$DST/"
-  ```
-  Then rebuild. (Resolving the root cause on the newer SDK is still TODO — consider pinning/downloading the cached zip
-  so this isn't needed per-app.)
+- Host: M2 Air (14,2) macOS 26.5.2
+- Project: `/Users/adolforeyna/Projects/Tactility/apps`
+- ESP-IDF: `/Users/adolforeyna/esp/esp-idf`, Python env `idf5.3_py3.9_env` at `~/.espressif/python_env/idf5.3_py3.9_env`
+- Tactility SDK: `/Users/adolforeyna/Projects/Tactility/firmware/release/TactilitySDK` (built locally, `--local-sdk`)

 ### Hardware

 | Board | IP | Port | Notes |
 |-------|-----|------|-------|
 | ES3C28P 2.8" color 240x320 | `192.168.68.112` | `/dev/cu.usbmodem101` | Primary deploy target, 16MB flash, OCT PSRAM, SD for ELF assets |
-| ES3C28P 2.8" color 240x320 | `192.168.68.114` | `/dev/cu.usbmodem101` | Secondary S3 (used for recent BookPlayer deploys) |
-| Waveshare RLCD 4.2" mono 400x300 ST7305 | `192.168.68.111` | `/dev/cu.usbmodem1101` | Secondary, compact density, SD threshold 60, font 18 |
+| Waveshare RLCD 4.2" mono 400x300 ST7305 | `192.168.68.111`? .1101 USB | `/dev/cu.usbmodem1101` | Secondary, compact density, mono threshold 60, font 18 |

-User shorthand: "ending in 112" → `192.168.68.112`. Install is dashboard-port API (80), not dev port 6666.
+User shorthand: "ending in 112" → `192.168.68.112`.

 ## Build, Deploy, Run — Correct Env Wrapper

@@ -53,10 +34,11 @@ Hermes desktop Python 3.11 venv pollutes `PYTHONPATH` → `tactility.py` crashes
 Always:

 ```bash
-cd /Users/adolforeyna/Projects/electronics/tactility/tactility_apps
+cd /Users/adolforeyna/Projects/Tactility/apps
 unset PYTHONPATH; unset PYTHONHOME
-export IDF_PYTHON_ENV_PATH=/Users/adolforeyna/.espressif/python_env/idf5.5_py3.9_env
+export IDF_PYTHON_ENV_PATH=/Users/adolforeyna/.espressif/python_env/idf5.3_py3.9_env
 source /Users/adolforeyna/esp/esp-idf/export.sh
+export TACTILITY_SDK_PATH=/Users/adolforeyna/Projects/Tactility/firmware/release/TactilitySDK

 # Build
 $IDF_PYTHON_ENV_PATH/bin/python tactility.py Apps/MyApp clean
@@ -69,7 +51,6 @@ xtensa-esp32s3-elf-nm -D Apps/MyApp/build/cmake-build-esp32s3/MyApp.app.elf | gr
 python .claude/skills/tactility-app-development/scripts/verify_symbols.py Apps/MyApp

 # Install to device (dashboard API port 80, not dev port 6666)
-# Preferred: use reyna-cli (see "Device discovery & management via reyna-cli" below)
 $IDF_PYTHON_ENV_PATH/bin/python tactility.py Apps/MyApp install 192.168.68.112 esp32s3
 # or dashboard directly:
 curl -X PUT http://192.168.68.112/api/apps/install -F "file=@build/MyApp.app"
@@ -84,41 +65,6 @@ curl http://192.168.68.112/api/apps   # list installed
 # If 6666 refused → use dashboard PUT above
 ```

-### Device discovery & management via reyna-cli
-
-`reyna-cli` (at `/Users/adolforeyna/.local/bin/reyna-cli`) wraps the Tactility LAN web API with a device registry
-(`~/.hermes/local_devices.yaml`). Prefer it over raw IPs/curl for fleet discovery and management. Boards are
-addressed by their stable registry **ID** (not IP — DHCP IPs change); `devices list` maps IDs→IPs.
-
-Registered Tactility boards (from `reyna-cli devices list`):
-
-| ID | IP | Board |
-|----|----|-------|
-| `kidosos_a790` | `.129` | Personal 3.5-inch Tactility Board (Dev) — USB `/dev/cu.usbmodem*` for serial |
-| `kidosos_5c5c` | `.114` | Grace's 2.8-inch board |
-| `kidosos_5690` | `.107` | Elias's 2.8-inch board |
-| `kidosos_591c` | `.128` | Kitchen 2.8-inch board |
-| `esp32_screen` | `.123` | ESP32 Screen |
-| `little32` | `.122` | Little32 Kitchen ESP32 Screen |
-
-Commands:
-
-```bash
-reyna-cli tactility discover                       # probe all boards; online/offline + sysinfo
-reyna-cli devices list                             # registry (id, ip, display name, status)
-reyna-cli tactility sysinfo kidsos_a790            # firmware/version/heap/psram/SD
-reyna-cli tactility apps kidsos_a790               # installed apps
-reyna-cli tactility install kidsos_5c5c build/MyApp.app   # PUT install by device id
-reyna-cli tactility run kidsos_5c5c one.tactility.myapp   # launch app
-reyna-cli tactility report kidsos_a790             # apps + SD + bible/podcast usage
-# most commands accept --json for machine-readable output
-```
-
-Use a serial monitor on the USB board for loader/ELF diagnostics: `/dev/cu.usbmodem*` @ 115200
-(e.g. `idf5.5_py3.9_env/bin/python -m serial.tools.miniterm /dev/cu.usbmodem31201 115200`). This is how you
-capture `E ELF: Can't find symbol X` on `.129` — `verify_symbols.py` only compares against local firmware
-SOURCE and can pass even when the flashed firmware's export table differs.
-
 ### manifest.properties

 ```properties
@@ -157,7 +103,6 @@ Keep app source as pure C (no `auto`, no lambdas in `.c`) or rename to `.cpp`.
 Tactility firmware exports symbols via `ESP_ELFSYM_EXPORT` / `DEFINE_MODULE_SYMBOL` in `firmware/Modules/lvgl-module/source/symbols.c`. If ELF references an unexported symbol → device modal `Error / Application failed to start: missing symbol`, heap still healthy (~31KB free) → NOT OOM.

 Known missing on 0.8.0-dev:
- `device_get_by_name` / `device_get_first_by_type` (out-param API) → **Not exported** by flashed firmware; use legacy exported `device_find_by_name` / `device_find_first_by_type` (declare them locally — newer SDK headers dropped them). Gotcha: `verify_symbols.py` compares vs local firmware SOURCE and can pass even when the flashed firmware's export table differs — confirm on-device via serial (`/dev/cu.usbmodem*`, 115200): `E ELF: Can't find symbol X`.
 - `lv_font_montserrat_14/18` → use `lvgl_get_text_font(SMALL/DEFAULT/LARGE)` via `tactility/lvgl_fonts.h`
 - `lv_obj_set_style_bg_grad_color/dir/stop`, `LV_OPA_95/5`, `LV_SYMBOL_STAR` → use solid colors, COVER/90
 - `lv_obj_set_style_max_width` → use `LV_PCT(92)` fixed percents for gutters
@@ -31,6 +31,7 @@ LV_FONT_DECLARE(georgia_regular_24)
 // books.json : array of {bnumber, bname, verses, chapters}

 #define MAX_BIBLE_BOOKS 66
+#define MAX_FAVORITES 512
 #define MAX_BOOK_NAME 40
 #define MAX_VERSE_TEXT 2048
 #define MAX_PATH 128
@@ -115,11 +116,23 @@ typedef struct {
    lv_obj_t* book_center_num;
    lv_obj_t* book_center_verses;
    lv_obj_t* book_slider; // fast scrub
+    lv_obj_t* btn_favorites;
    int book_dial_idx; // 0..book_count-1 currently selected
+    int favorite_indices[MAX_FAVORITES];
+    int favorite_count;
+    int favorite_dial_idx;
+    bool browsing_favorites;
+    bool favorite_navigation_active;
    int book_drag_start_x;
    bool book_dragging;
    bool book_browser_visible;

+    // Reading-view swipe tracking
+    int verse_drag_start_x;
+    int verse_drag_start_y;
+    bool verse_dragging;
+    bool verse_swipe_consumed;
+
    // Timer
    lv_timer_t* auto_timer;
    lv_timer_t* chrome_auto_hide_timer; // menu auto-hide after 10s on start
@@ -135,6 +148,7 @@ static bool load_book(AppCtx* ctx, int bnumber);
 static void unload_book(AppCtx* ctx);
 static void show_current_verse(AppCtx* ctx);
 static void advance_verse(AppCtx* ctx, int delta);
+static void manually_advance_verse(AppCtx* ctx, int delta);
 static void jump_to_book(AppCtx* ctx, int book_idx);
 static void jump_to_global(AppCtx* ctx, int global_idx);
 static void save_progress(AppCtx* ctx);
@@ -142,6 +156,7 @@ static bool load_progress(AppCtx* ctx);
 static void toggle_ui(AppCtx* ctx);
 static void set_chrome_visible(AppCtx* ctx, bool visible);
 static bool is_favorite(AppCtx* ctx, int global_idx);
+static void load_favorites(AppCtx* ctx);
 static void toggle_favorite(AppCtx* ctx);
 static void ensure_user_dir(AppCtx* ctx);
 static void set_book_browser_visible(AppCtx* ctx, bool visible);
@@ -524,13 +539,33 @@ static bool is_favorite(AppCtx* ctx, int global_idx) {
    return false;
 }

+static void load_favorites(AppCtx* ctx) {
+    ctx->favorite_count = 0;
+    FILE* f = fopen(ctx->favorites_path, "r");
+    if (!f) return;
+    int global_idx;
+    while (ctx->favorite_count < MAX_FAVORITES && fscanf(f, "%d", &global_idx) == 1) {
+        if (global_idx >= 0 && global_idx < ctx->total_verses) {
+            ctx->favorite_indices[ctx->favorite_count++] = global_idx;
+        }
+    }
+    fclose(f);
+}
+
+static int find_favorite_position(AppCtx* ctx, int global_idx) {
+    for (int i = 0; i < ctx->favorite_count; i++) {
+        if (ctx->favorite_indices[i] == global_idx) return i;
+    }
+    return -1;
+}
+
 static void toggle_favorite(AppCtx* ctx) {
    // load all
-    int vals[512];
+    int vals[MAX_FAVORITES];
    int cnt=0;
    FILE* f = fopen(ctx->favorites_path, "r");
    if (f) {
-        while (cnt<512 && fscanf(f, "%d", &vals[cnt])==1) cnt++;
+        while (cnt<MAX_FAVORITES && fscanf(f, "%d", &vals[cnt])==1) cnt++;
        fclose(f);
    }
    // check existence
@@ -542,7 +577,7 @@ static void toggle_favorite(AppCtx* ctx) {
        cnt--;
        ctx->is_highlighted=false;
    } else {
-        if (cnt<512) {
+        if (cnt<MAX_FAVORITES) {
            vals[cnt++]=ctx->cur_global;
            ctx->is_highlighted=true;
        }
@@ -552,6 +587,7 @@ static void toggle_favorite(AppCtx* ctx) {
    if (!f) return;
    for (int i=0;i<cnt;i++) fprintf(f, "%d\n", vals[i]);
    fclose(f);
+    load_favorites(ctx);
 }

 /* ── UI logic ── */
@@ -709,9 +745,24 @@ static void show_current_verse(AppCtx* ctx) {
    }

    ctx->is_highlighted = is_favorite(ctx, ctx->cur_global);
+    if (ctx->favorite_navigation_active) {
+        load_favorites(ctx);
+        int favorite_pos = find_favorite_position(ctx, ctx->cur_global);
+        if (favorite_pos >= 0) {
+            ctx->favorite_dial_idx = favorite_pos;
+            if (ctx->lbl_position) {
+                char favorite_pos_buf[40];
+                snprintf(favorite_pos_buf, sizeof(favorite_pos_buf), "Fav %d / %d",
+                    favorite_pos + 1, ctx->favorite_count);
+                lv_label_set_text(ctx->lbl_position, favorite_pos_buf);
+            }
+        } else if (ctx->favorite_count == 0) {
+            ctx->favorite_navigation_active = false;
+        }
+    }
    if (ctx->btn_highlight) {
        lv_obj_t* lbl = lv_obj_get_child(ctx->btn_highlight, 0);
-        if (lbl) lv_label_set_text(lbl, ctx->is_highlighted ? LV_SYMBOL_OK : LV_SYMBOL_DUMMY);
+        if (lbl) lv_label_set_text(lbl, ctx->is_highlighted ? LV_SYMBOL_OK : LV_SYMBOL_PLUS);
        if (ctx->is_highlighted) {
            lv_obj_set_style_bg_color(ctx->btn_highlight, lv_color_hex(0xF5C16C), 0);
            lv_obj_set_style_text_color(ctx->btn_highlight, lv_color_hex(0x1E1E2E), 0);
@@ -734,11 +785,17 @@ static void show_current_verse(AppCtx* ctx) {
    }

    if (ctx->btn_prev) {
-        if (ctx->cur_global<=0) lv_obj_add_state(ctx->btn_prev, LV_STATE_DISABLED);
+        bool at_start = ctx->favorite_navigation_active
+            ? ctx->favorite_dial_idx <= 0
+            : ctx->cur_global <= 0;
+        if (at_start) lv_obj_add_state(ctx->btn_prev, LV_STATE_DISABLED);
        else lv_obj_clear_state(ctx->btn_prev, LV_STATE_DISABLED);
    }
    if (ctx->btn_next) {
-        if (ctx->cur_global >= ctx->total_verses-1) lv_obj_add_state(ctx->btn_next, LV_STATE_DISABLED);
+        bool at_end = ctx->favorite_navigation_active
+            ? ctx->favorite_dial_idx >= ctx->favorite_count - 1
+            : ctx->cur_global >= ctx->total_verses - 1;
+        if (at_end) lv_obj_add_state(ctx->btn_next, LV_STATE_DISABLED);
        else lv_obj_clear_state(ctx->btn_next, LV_STATE_DISABLED);
    }
    free(verse_buf);
@@ -747,6 +804,28 @@ static void show_current_verse(AppCtx* ctx) {
 }

 static void advance_verse(AppCtx* ctx, int delta) {
+    if (ctx->favorite_navigation_active) {
+        load_favorites(ctx);
+        if (ctx->favorite_count <= 0) {
+            ctx->favorite_navigation_active = false;
+            return;
+        }
+        int current_pos = find_favorite_position(ctx, ctx->cur_global);
+        if (current_pos < 0) current_pos = ctx->favorite_dial_idx;
+        if (current_pos < 0) current_pos = 0;
+        if (current_pos >= ctx->favorite_count) current_pos = ctx->favorite_count - 1;
+        int next_pos = current_pos + delta;
+        if (next_pos < 0) next_pos = 0;
+        if (next_pos >= ctx->favorite_count) next_pos = ctx->favorite_count - 1;
+        ctx->favorite_dial_idx = next_pos;
+        int next_global = ctx->favorite_indices[next_pos];
+        if (next_global != ctx->cur_global) {
+            ctx->cur_global = next_global;
+            show_current_verse(ctx);
+        }
+        return;
+    }
+
    int ng = ctx->cur_global + delta;
    if (ng < 0) ng = 0;
    if (ng >= ctx->total_verses) ng = ctx->total_verses-1;
@@ -756,6 +835,11 @@ static void advance_verse(AppCtx* ctx, int delta) {
    }
 }

+static void manually_advance_verse(AppCtx* ctx, int delta) {
+    advance_verse(ctx, delta);
+    if (ctx->auto_timer) lv_timer_reset(ctx->auto_timer);
+}
+
 static void jump_to_global(AppCtx* ctx, int global_idx) {
    if (global_idx < 0) global_idx = 0;
    if (global_idx >= ctx->total_verses) global_idx = ctx->total_verses-1;
@@ -769,6 +853,7 @@ static void jump_to_global(AppCtx* ctx, int global_idx) {

 static void jump_to_book(AppCtx* ctx, int book_idx) {
    if (book_idx < 0 || book_idx >= ctx->book_count) return;
+    ctx->favorite_navigation_active = false;
    // compute global start of book
    int global = 0;
    for (int i=0;i<book_idx;i++) global += ctx->books[i].verse_count;
@@ -779,7 +864,10 @@ static void jump_to_book(AppCtx* ctx, int book_idx) {
 static void on_auto_timer(lv_timer_t* t) {
    AppCtx* ctx = (AppCtx*)lv_timer_get_user_data(t);
    if (ctx->auto_paused) return;
-    if (ctx->cur_global < ctx->total_verses-1) {
+    bool has_next = ctx->favorite_navigation_active
+        ? ctx->favorite_dial_idx < ctx->favorite_count - 1
+        : ctx->cur_global < ctx->total_verses - 1;
+    if (has_next) {
        advance_verse(ctx, 1);
    } else {
        ctx->auto_paused = true;
@@ -803,6 +891,51 @@ static void book_fade_anim_cb(void* var, int32_t v) {

 static void book_dial_update_center(AppCtx* ctx) {
    if (!ctx->book_center_name) return;
+    if (ctx->browsing_favorites) {
+        if (ctx->favorite_count <= 0) {
+            lv_label_set_text(ctx->book_center_name, "No favorites yet");
+            lv_label_set_text(ctx->book_center_verses, "Mark a verse with the check button, then return here.");
+            lv_label_set_text(ctx->book_center_num, "0 / 0");
+            lv_slider_set_range(ctx->book_slider, 0, 0);
+            lv_slider_set_value(ctx->book_slider, 0, LV_ANIM_OFF);
+            lv_obj_set_style_text_color(ctx->book_center_name, lv_color_hex(0xF5C16C), 0);
+            return;
+        }
+
+        if (ctx->favorite_dial_idx < 0) ctx->favorite_dial_idx = 0;
+        if (ctx->favorite_dial_idx >= ctx->favorite_count) ctx->favorite_dial_idx = ctx->favorite_count - 1;
+        int global_idx = ctx->favorite_indices[ctx->favorite_dial_idx];
+        int remaining = global_idx;
+        int book_idx = 0;
+        while (book_idx < ctx->book_count - 1 &&
+               remaining >= ctx->books[book_idx].verse_count) {
+            remaining -= ctx->books[book_idx].verse_count;
+            book_idx++;
+        }
+
+        const char* verse_text = "Unable to load verse";
+        char ref[64];
+        snprintf(ref, sizeof(ref), "%s", ctx->books[book_idx].bname);
+        if (load_book(ctx, ctx->books[book_idx].bnumber) &&
+            remaining >= 0 && remaining < ctx->book_idx_count) {
+            VerseIndex* vi = &ctx->book_idx[remaining];
+            snprintf(ref, sizeof(ref), "%s %d:%d", ctx->books[book_idx].bname, vi->cnum, vi->vnum);
+            if (vi->offset < ctx->book_bin_size) {
+                verse_text = (const char*)(ctx->book_bin + vi->offset);
+            }
+        }
+
+        lv_label_set_text(ctx->book_center_name, ref);
+        lv_label_set_text(ctx->book_center_verses, verse_text);
+        char count[24];
+        snprintf(count, sizeof(count), "%d / %d", ctx->favorite_dial_idx + 1, ctx->favorite_count);
+        lv_label_set_text(ctx->book_center_num, count);
+        lv_slider_set_range(ctx->book_slider, 0, ctx->favorite_count - 1);
+        lv_slider_set_value(ctx->book_slider, ctx->favorite_dial_idx, LV_ANIM_OFF);
+        lv_obj_set_style_text_color(ctx->book_center_name, lv_color_hex(0xF5C16C), 0);
+        return;
+    }
+
    if (ctx->book_dial_idx <0) ctx->book_dial_idx=0;
    if (ctx->book_dial_idx >= ctx->book_count) ctx->book_dial_idx = ctx->book_count-1;
    BookInfo* b = &ctx->books[ctx->book_dial_idx];
@@ -835,6 +968,7 @@ static void book_dial_update_center(AppCtx* ctx) {
    lv_obj_set_style_text_color(ctx->book_center_name, lv_color_hex(col), 0);

    if (ctx->book_slider) {
+        lv_slider_set_range(ctx->book_slider, 0, ctx->book_count>0 ? ctx->book_count-1 : 0);
        // avoid recursive event loop - set without anim, but we add subtle anim for drag
        lv_slider_set_value(ctx->book_slider, ctx->book_dial_idx, LV_ANIM_OFF);
    }
@@ -843,7 +977,13 @@ static void book_dial_update_center(AppCtx* ctx) {
 static void set_book_browser_visible(AppCtx* ctx, bool visible) {
    ctx->book_browser_visible = visible;
    if (visible) {
+        ctx->browsing_favorites = false;
        ctx->book_dial_idx = ctx->cur_book_idx;
+        load_favorites(ctx);
+        if (ctx->btn_favorites) {
+            lv_obj_set_style_bg_color(ctx->btn_favorites, lv_color_hex(0x252538), 0);
+            lv_obj_set_style_text_color(ctx->btn_favorites, lv_color_hex(0xC4C4D4), 0);
+        }
        book_dial_update_center(ctx);
        if (ctx->book_browser) {
            lv_obj_remove_flag(ctx->book_browser, LV_OBJ_FLAG_HIDDEN);
@@ -890,20 +1030,65 @@ static void on_books_close_click(lv_event_t* e) {
 }
 static void on_book_center_click(lv_event_t* e) {
    AppCtx* ctx = (AppCtx*)lv_event_get_user_data(e);
+    if (ctx->browsing_favorites) {
+        if (ctx->favorite_count > 0) {
+            jump_to_global(ctx, ctx->favorite_indices[ctx->favorite_dial_idx]);
+        }
+    } else {
        jump_to_book(ctx, ctx->book_dial_idx);
    }
+}
 static void on_dial_prev_click(lv_event_t* e) {
    AppCtx* ctx = (AppCtx*)lv_event_get_user_data(e);
-    if (ctx->book_dial_idx>0) { ctx->book_dial_idx--; book_dial_update_center(ctx); }
+    if (ctx->browsing_favorites) {
+        if (ctx->favorite_dial_idx > 0) {
+            ctx->favorite_dial_idx--;
+            book_dial_update_center(ctx);
+        }
+    } else if (ctx->book_dial_idx>0) {
+        ctx->book_dial_idx--;
+        book_dial_update_center(ctx);
+    }
 }
 static void on_dial_next_click(lv_event_t* e) {
    AppCtx* ctx = (AppCtx*)lv_event_get_user_data(e);
-    if (ctx->book_dial_idx < ctx->book_count-1) { ctx->book_dial_idx++; book_dial_update_center(ctx); }
+    if (ctx->browsing_favorites) {
+        if (ctx->favorite_dial_idx < ctx->favorite_count - 1) {
+            ctx->favorite_dial_idx++;
+            book_dial_update_center(ctx);
+        }
+    } else if (ctx->book_dial_idx < ctx->book_count-1) {
+        ctx->book_dial_idx++;
+        book_dial_update_center(ctx);
+    }
 }
 static void on_slider_changed(lv_event_t* e) {
    AppCtx* ctx = (AppCtx*)lv_event_get_user_data(e);
    int v = lv_slider_get_value(ctx->book_slider);
-    if (v!=ctx->book_dial_idx) { ctx->book_dial_idx=v; book_dial_update_center(ctx); }
+    if (ctx->browsing_favorites) {
+        if (v != ctx->favorite_dial_idx) {
+            ctx->favorite_dial_idx = v;
+            book_dial_update_center(ctx);
+        }
+    } else if (v!=ctx->book_dial_idx) {
+        ctx->book_dial_idx=v;
+        book_dial_update_center(ctx);
+    }
+}
+static void on_favorites_click(lv_event_t* e) {
+    AppCtx* ctx = (AppCtx*)lv_event_get_user_data(e);
+    load_favorites(ctx);
+    if (ctx->favorite_count <= 0) {
+        ctx->browsing_favorites = true;
+        book_dial_update_center(ctx);
+        return;
+    }
+
+    int current_pos = find_favorite_position(ctx, ctx->cur_global);
+    ctx->favorite_dial_idx = current_pos >= 0 ? current_pos : 0;
+    ctx->favorite_navigation_active = true;
+    ctx->browsing_favorites = false;
+    jump_to_global(ctx, ctx->favorite_indices[ctx->favorite_dial_idx]);
 }
 static void on_swipe_area_event(lv_event_t* e) {
    AppCtx* ctx = (AppCtx*)lv_event_get_user_data(e);
@@ -919,11 +1104,15 @@ static void on_swipe_area_event(lv_event_t* e) {
        int thresh = 28; // px per book
        if (abs(dx) >= thresh) {
            int steps = dx / thresh;
-            int new_idx = ctx->book_dial_idx - steps; // swipe left -> next
+            int old_idx = ctx->browsing_favorites ? ctx->favorite_dial_idx : ctx->book_dial_idx;
+            int max_idx = ctx->browsing_favorites ? ctx->favorite_count - 1 : ctx->book_count - 1;
+            if (max_idx < 0) max_idx = 0;
+            int new_idx = old_idx - steps; // swipe left -> next
            if (new_idx<0) new_idx=0;
-            if (new_idx>=ctx->book_count) new_idx=ctx->book_count-1;
-            if (new_idx!=ctx->book_dial_idx) {
-                ctx->book_dial_idx = new_idx;
+            if (new_idx>max_idx) new_idx=max_idx;
+            if (new_idx!=old_idx) {
+                if (ctx->browsing_favorites) ctx->favorite_dial_idx = new_idx;
+                else ctx->book_dial_idx = new_idx;
                book_dial_update_center(ctx);
            }
            ctx->book_drag_start_x = p.x; // reset for next step
@@ -992,6 +1181,9 @@ static void build_book_browser(AppCtx* ctx, lv_obj_t* parent) {

    ctx->book_center_verses = lv_label_create(mid_wrap);
    lv_label_set_text(ctx->book_center_verses, "—");
+    lv_obj_set_width(ctx->book_center_verses, LV_PCT(100));
+    lv_obj_set_height(ctx->book_center_verses, 72);
+    lv_label_set_long_mode(ctx->book_center_verses, LV_LABEL_LONG_MODE_DOTS);
    lv_obj_set_style_text_color(ctx->book_center_verses, lv_color_hex(0x5A5A78), 0);
    lv_obj_set_style_text_font(ctx->book_center_verses, lvgl_get_text_font(FONT_SIZE_SMALL), 0);
    lv_obj_set_style_text_align(ctx->book_center_verses, LV_TEXT_ALIGN_CENTER, 0);
@@ -1005,7 +1197,7 @@ static void build_book_browser(AppCtx* ctx, lv_obj_t* parent) {
    lv_obj_t* l_r = lv_label_create(btn_r); lv_label_set_text(l_r, LV_SYMBOL_NEXT); lv_obj_center(l_r);
    lv_obj_add_event_cb(btn_r, on_dial_next_click, LV_EVENT_CLICKED, ctx);

-    // Bottom bar: [X cancel] [slider] [N / 66]
+    // Bottom bar: [X cancel] [Fav] [slider] [N / 66]
    lv_obj_t* bottom = lv_obj_create(ctx->book_browser);
    lv_obj_set_size(bottom, LV_PCT(100), 56);
    lv_obj_align(bottom, LV_ALIGN_BOTTOM_MID, 0, 0);
@@ -1029,6 +1221,17 @@ static void build_book_browser(AppCtx* ctx, lv_obj_t* parent) {
    lv_obj_t* l_cancel = lv_label_create(btn_cancel); lv_label_set_text(l_cancel, LV_SYMBOL_CLOSE); lv_obj_center(l_cancel);
    lv_obj_add_event_cb(btn_cancel, on_books_close_click, LV_EVENT_CLICKED, ctx);

+    ctx->btn_favorites = lv_button_create(bottom);
+    lv_obj_set_size(ctx->btn_favorites, 44, 32);
+    lv_obj_set_style_radius(ctx->btn_favorites, 8, 0);
+    lv_obj_set_style_bg_color(ctx->btn_favorites, lv_color_hex(0x252538), 0);
+    lv_obj_set_style_text_color(ctx->btn_favorites, lv_color_hex(0xC4C4D4), 0);
+    lv_obj_t* l_favorites = lv_label_create(ctx->btn_favorites);
+    lv_label_set_text(l_favorites, "Fav");
+    lv_obj_set_style_text_font(l_favorites, lvgl_get_text_font(FONT_SIZE_SMALL), 0);
+    lv_obj_center(l_favorites);
+    lv_obj_add_event_cb(ctx->btn_favorites, on_favorites_click, LV_EVENT_CLICKED, ctx);
+
    ctx->book_slider = lv_slider_create(bottom);
    lv_obj_set_flex_grow(ctx->book_slider, 1);
    lv_obj_set_height(ctx->book_slider, 8);
@@ -1052,8 +1255,35 @@ static void build_book_browser(AppCtx* ctx, lv_obj_t* parent) {
 }

 /* ── UI callbacks ── */
+static void on_verse_pointer_event(lv_event_t* e) {
+    AppCtx* ctx = (AppCtx*)lv_event_get_user_data(e);
+    lv_event_code_t code = lv_event_get_code(e);
+    lv_indev_t* indev = lv_indev_active();
+    if (!indev) return;
+    lv_point_t p;
+    lv_indev_get_point(indev, &p);
+    if (code == LV_EVENT_PRESSED) {
+        ctx->verse_drag_start_x = p.x;
+        ctx->verse_drag_start_y = p.y;
+        ctx->verse_dragging = true;
+        ctx->verse_swipe_consumed = false;
+    } else if ((code == LV_EVENT_RELEASED || code == LV_EVENT_PRESS_LOST) && ctx->verse_dragging) {
+        int dx = p.x - ctx->verse_drag_start_x;
+        int dy = p.y - ctx->verse_drag_start_y;
+        ctx->verse_dragging = false;
+        if (abs(dx) >= 40 && abs(dx) > abs(dy)) {
+            ctx->verse_swipe_consumed = true;
+            manually_advance_verse(ctx, dx < 0 ? 1 : -1);
+        }
+    }
+}
+
 static void on_verse_tap(lv_event_t* e) {
    AppCtx* ctx = (AppCtx*)lv_event_get_user_data(e);
+    if (ctx->verse_swipe_consumed) {
+        ctx->verse_swipe_consumed = false;
+        return;
+    }
    toggle_ui(ctx);
 }

@@ -1103,11 +1333,11 @@ static void set_chrome_visible(AppCtx* ctx, bool visible) {

 static void on_prev_click(lv_event_t* e) {
    AppCtx* ctx = (AppCtx*)lv_event_get_user_data(e);
-    advance_verse(ctx, -1);
+    manually_advance_verse(ctx, -1);
 }
 static void on_next_click(lv_event_t* e) {
    AppCtx* ctx = (AppCtx*)lv_event_get_user_data(e);
-    advance_verse(ctx, 1);
+    manually_advance_verse(ctx, 1);
 }
 static void on_play_pause_click(lv_event_t* e) {
    AppCtx* ctx = (AppCtx*)lv_event_get_user_data(e);
@@ -1120,6 +1350,17 @@ static void on_play_pause_click(lv_event_t* e) {
 static void on_highlight_click(lv_event_t* e) {
    AppCtx* ctx = (AppCtx*)lv_event_get_user_data(e);
    toggle_favorite(ctx);
+    if (ctx->favorite_navigation_active && !ctx->is_highlighted) {
+        if (ctx->favorite_count <= 0) {
+            ctx->favorite_navigation_active = false;
+        } else {
+            if (ctx->favorite_dial_idx >= ctx->favorite_count) {
+                ctx->favorite_dial_idx = ctx->favorite_count - 1;
+            }
+            ctx->cur_global = ctx->favorite_indices[ctx->favorite_dial_idx];
+            if (ctx->auto_timer) lv_timer_reset(ctx->auto_timer);
+        }
+    }
    // refresh highlight visuals without reloading
    show_current_verse(ctx);
 }
@@ -1198,6 +1439,9 @@ static void onShowApp(AppHandle app, void* data, lv_obj_t* parent) {
    lv_obj_set_style_pad_all(g_ctx.verse_wrapper, 0, 0);
    lv_obj_remove_flag(g_ctx.verse_wrapper, LV_OBJ_FLAG_SCROLLABLE);
    lv_obj_add_flag(g_ctx.verse_wrapper, LV_OBJ_FLAG_CLICKABLE);
+    lv_obj_add_event_cb(g_ctx.verse_wrapper, on_verse_pointer_event, LV_EVENT_PRESSED, &g_ctx);
+    lv_obj_add_event_cb(g_ctx.verse_wrapper, on_verse_pointer_event, LV_EVENT_RELEASED, &g_ctx);
+    lv_obj_add_event_cb(g_ctx.verse_wrapper, on_verse_pointer_event, LV_EVENT_PRESS_LOST, &g_ctx);
    lv_obj_add_event_cb(g_ctx.verse_wrapper, on_verse_tap, LV_EVENT_CLICKED, &g_ctx);

    // Center reading column with generous breathing room - avoid top chrome crop
@@ -1213,6 +1457,9 @@ static void onShowApp(AppHandle app, void* data, lv_obj_t* parent) {
    lv_obj_set_style_pad_all(center_col, 0, 0);
    lv_obj_remove_flag(center_col, LV_OBJ_FLAG_SCROLLABLE);
    lv_obj_add_flag(center_col, LV_OBJ_FLAG_CLICKABLE);
+    lv_obj_add_event_cb(center_col, on_verse_pointer_event, LV_EVENT_PRESSED, &g_ctx);
+    lv_obj_add_event_cb(center_col, on_verse_pointer_event, LV_EVENT_RELEASED, &g_ctx);
+    lv_obj_add_event_cb(center_col, on_verse_pointer_event, LV_EVENT_PRESS_LOST, &g_ctx);
    lv_obj_add_event_cb(center_col, on_verse_tap, LV_EVENT_CLICKED, &g_ctx);

    g_ctx.lbl_verse = lv_label_create(center_col);
@@ -1324,7 +1571,7 @@ static void onShowApp(AppHandle app, void* data, lv_obj_t* parent) {
    lv_obj_set_style_radius(g_ctx.btn_highlight, 10, 0);
    lv_obj_set_style_bg_color(g_ctx.btn_highlight, lv_color_hex(0x252538), 0);
    lv_obj_set_style_text_color(g_ctx.btn_highlight, lv_color_hex(0x8C8CB0), 0);
-    lbl = lv_label_create(g_ctx.btn_highlight); lv_label_set_text(lbl, LV_SYMBOL_DUMMY); lv_obj_center(lbl);
+    lbl = lv_label_create(g_ctx.btn_highlight); lv_label_set_text(lbl, LV_SYMBOL_PLUS); lv_obj_center(lbl);
    lv_obj_add_event_cb(g_ctx.btn_highlight, on_highlight_click, LV_EVENT_CLICKED, &g_ctx);

    set_chrome_visible(&g_ctx, true); // start with menu showing per user request
@@ -32,10 +32,6 @@
 #define MAX_TITLE 128
 #define MAX_AUTHOR 128

-// Fade-in/out applied at the start/end of each page's narration to avoid an
-// amplitude step (audible "pop") at page boundaries. In frames per channel.
-#define FADE_FRAMES 4096
-
 typedef enum {
    STATE_IDLE,
    STATE_PLAYING,
@@ -87,12 +83,6 @@ typedef struct {
    uint8_t*       audio_buf; // Shared MP3 input and WAV buffer
    mp3d_sample_t* pcm_buf;   // MP3 decoded pcm buffer

-    // Currently-open output stream format (so we can reuse it across page
-    // changes instead of tearing the codec down/recreating it every page).
-    uint32_t       stream_rate;
-    uint8_t        stream_channels;
-    uint8_t        stream_bits;
-
    TaskHandle_t   playback_task_handle;
 } AppCtx;

@@ -125,15 +115,8 @@ static void play_wav(AppCtx* ctx);
 static void scan_books(AppCtx* ctx);

 /* ─── Audio-stream helpers ─── */
-// The flashed firmware exports the legacy device_find_* lookup API; the newer
-// device_get_* (out-param) API is not yet exported on 0.8.0-dev, so calling it
-// fails at load with "missing symbol". The newer SDK headers dropped the legacy
-// declarations, so declare them here (symbols are resolved at runtime by the ELF
-// loader against the flashed firmware).
-extern struct Device* device_find_by_name(const char* name);
-extern struct Device* device_find_first_by_type(const struct DeviceType* type);
-
 static bool find_audio_stream_device(AppCtx* ctx) {
+    // Prefer device_find_first_by_type but keep compatibility with name lookup
    struct Device* dev = device_find_by_name("audio-stream");
    if (dev) {
        ctx->stream_dev = dev;
@@ -151,20 +134,10 @@ static void close_stream_if_open(AppCtx* ctx) {
    if (ctx->stream_handle) {
        audio_stream_close(ctx->stream_handle);
        ctx->stream_handle = NULL;
-        ctx->stream_rate = 0;
-        ctx->stream_channels = 0;
-        ctx->stream_bits = 0;
    }
 }

 static bool open_output_stream(AppCtx* ctx, uint32_t sample_rate, uint8_t channels, uint8_t bits) {
-    // Reuse the already-open stream when the format hasn't changed. This keeps the
-    // codec alive across page changes, avoiding the audible pop caused by closing and
-    // re-initialising the audio hardware on every page turn.
-    if (ctx->stream_handle && ctx->stream_rate == sample_rate
-        && ctx->stream_channels == channels && ctx->stream_bits == bits) {
-        return true;
-    }
    close_stream_if_open(ctx);
    if (!ctx->stream_dev) return false;
    struct AudioStreamConfig cfg = {
@@ -178,9 +151,6 @@ static bool open_output_stream(AppCtx* ctx, uint32_t sample_rate, uint8_t channe
        ctx->stream_handle = NULL;
        return false;
    }
-    ctx->stream_rate = sample_rate;
-    ctx->stream_channels = channels;
-    ctx->stream_bits = bits;
    ESP_LOGI(TAG, "audio_stream output opened: %u Hz %u ch %u-bit", (unsigned)sample_rate, channels, bits);
    return true;
 }
@@ -352,7 +322,6 @@ static void load_page(AppCtx* ctx, int page_index, bool start_audio) {
 /* ─── Return to Book Picker Screen ─── */
 static void return_to_picker(AppCtx* ctx) {
    wait_for_playback_task_to_exit(ctx);
-    close_stream_if_open(ctx);

    if (ctx->manifest_root) {
        cJSON_Delete(ctx->manifest_root);
@@ -419,7 +388,6 @@ static void play_mp3(AppCtx* ctx) {
    bool eof = false;
    int sample_rate = 0;
    int channels = 0;
-    size_t page_frames_written = 0;

    ESP_LOGI(TAG, "Starting MP3 playback via audio-stream: %s (%d bytes)", ctx->current_audio_path, file_size);

@@ -474,30 +442,14 @@ static void play_mp3(AppCtx* ctx) {
                channels = info.channels;
            }

-            // Adjust Volume and apply a fade-in/out at the start/end of the page
-            // so the transition to the next page doesn't click.
+            // Adjust Volume
            int vol = ctx->volume;
            int16_t* samples_ptr = (int16_t*)ctx->pcm_buf;
            size_t sample_count = (size_t)samples * info.channels;
-            uint8_t ch = (uint8_t)info.channels;
-            size_t bytes_per_frame = (size_t)ch * sizeof(int16_t);
-            size_t frames_in_chunk = (size_t)samples;
-            float remaining_frames = (file_size > bytes_read_total)
-                ? (float)(file_size - bytes_read_total) / (float)bytes_per_frame : 0.0f;
            for (size_t i = 0; i < sample_count; ++i) {
-                size_t frame = page_frames_written + i / ch;
-                float fade_in = (frame < FADE_FRAMES) ? (float)frame / (float)FADE_FRAMES : 1.0f;
-                float fade_out = 1.0f;
-                float remaining = remaining_frames - (float)(i / ch);
-                if (remaining < (float)FADE_FRAMES) {
-                    fade_out = (remaining > 0.0f) ? remaining / (float)FADE_FRAMES : 0.0f;
-                }
-                float gain = fade_in * fade_out;
                int32_t scaled = (int32_t)samples_ptr[i] * vol / 100;
-                scaled = (int32_t)((float)scaled * gain);
                samples_ptr[i] = (int16_t)scaled;
            }
-            page_frames_written += frames_in_chunk;

            // Write via audio_stream (resampled to native 44100 internally)
            size_t offset = 0;
@@ -533,16 +485,10 @@ static void play_mp3(AppCtx* ctx) {
    }

    fclose(file);
+    close_stream_if_open(ctx);

    bool stopped_externally = (ctx->state == STATE_IDLE);

-    if (stopped_externally) {
-        // User-initiated stop (prev/next, back, app close): tear the stream down.
-        close_stream_if_open(ctx);
-    }
-    // On a natural page finish we deliberately LEAVE the stream open so the next
-    // page reuses it, instead of closing+recreating the codec (which pops).
-
    if (!stopped_externally) {
        tt_lvgl_lock(portMAX_DELAY);
        handle_audio_finished(ctx);
@@ -621,7 +567,6 @@ static void play_wav(AppCtx* ctx) {
    ESP_LOGI(TAG, "Starting WAV via audio-stream: %s (%u Hz, %u ch)", ctx->current_audio_path, (unsigned int)header.sample_rate, (unsigned int)header.channels);

    size_t total_played = 0;
-    size_t page_frames_written = 0;
    bool stream_open = true;

    while (total_played < data_size && ctx->state != STATE_IDLE) {
@@ -643,29 +588,14 @@ static void play_wav(AppCtx* ctx) {
        size_t read_bytes = fread(ctx->audio_buf, 1, to_read, file);
        if (read_bytes == 0) break;

-        // Scaling Volume + fade-in/out at page boundaries to avoid a click.
+        // Scaling Volume
        int vol = ctx->volume;
        int16_t* samples_ptr = (int16_t*)ctx->audio_buf;
        size_t sample_count = read_bytes / sizeof(int16_t);
-        uint8_t ch = (header.channels > 0) ? header.channels : 1;
-        size_t bytes_per_frame = (size_t)ch * sizeof(int16_t);
-        size_t frames_in_chunk = read_bytes / bytes_per_frame;
-        float remaining_frames = (data_size > total_played)
-            ? (float)(data_size - total_played) / (float)bytes_per_frame : 0.0f;
        for (size_t i = 0; i < sample_count; ++i) {
-            size_t frame = page_frames_written + i / ch;
-            float fade_in = (frame < FADE_FRAMES) ? (float)frame / (float)FADE_FRAMES : 1.0f;
-            float fade_out = 1.0f;
-            float remaining = remaining_frames - (float)(i / ch);
-            if (remaining < (float)FADE_FRAMES) {
-                fade_out = (remaining > 0.0f) ? remaining / (float)FADE_FRAMES : 0.0f;
-            }
-            float gain = fade_in * fade_out;
            int32_t scaled = (int32_t)samples_ptr[i] * vol / 100;
-            scaled = (int32_t)((float)scaled * gain);
            samples_ptr[i] = (int16_t)scaled;
        }
-        page_frames_written += frames_in_chunk;

        // Write via audio_stream
        size_t offset = 0;
@@ -699,16 +629,10 @@ static void play_wav(AppCtx* ctx) {
    }

    fclose(file);
+    close_stream_if_open(ctx);

    bool stopped_externally = (ctx->state == STATE_IDLE);

-    if (stopped_externally) {
-        // User-initiated stop (prev/next, back, app close): tear the stream down.
-        close_stream_if_open(ctx);
-    }
-    // On a natural page finish we deliberately LEAVE the stream open so the next
-    // page reuses it, instead of closing+recreating the codec (which pops).
-
    if (!stopped_externally) {
        tt_lvgl_lock(portMAX_DELAY);
        handle_audio_finished(ctx);
@@ -0,0 +1,12 @@
+cmake_minimum_required(VERSION 3.20)
+include($ENV{IDF_PATH}/tools/cmake/project.cmake)
+if (DEFINED ENV{TACTILITY_SDK_PATH})
+    set(TACTILITY_SDK_PATH $ENV{TACTILITY_SDK_PATH})
+else()
+    set(TACTILITY_SDK_PATH "../../release/TactilitySDK")
+    message(WARNING "TACTILITY_SDK_PATH not set, defaulting to ${TACTILITY_SDK_PATH}")
+endif()
+include("${TACTILITY_SDK_PATH}/TactilitySDK.cmake")
+set(EXTRA_COMPONENT_DIRS ${TACTILITY_SDK_PATH})
+project(DiscoveryMountain)
+tactility_project(DiscoveryMountain)
@@ -0,0 +1,263 @@
+# DiscoveryMountain – Crash After Install – Root Cause & Fix
+
+**Board:** CYD ES3C28P (es3c28p) `192.168.68.132`  
+**Firmware:** 0.8.0-dev / IDF 5.5.2  
+**App ID:** `one.tactility.discoverymountain`  
+**Branch:** `personal/discovery-mountain-player` → merged into `main`  
+**Date:** 2026-07-21
+
+---
+
+## Symptoms
+
+- After `tactility.py install 192.168.68.132`, device reboots or shows blue dialog `Application failed to start: missing symbol`
+- Serial logs: `E ELF: Can't find symbol ...`, then `Guru Meditation` (LoadProhibited, StoreProhibited, IllegalInstruction, Cache error)
+- Even when it did start, fetch fell back to 6 dummy episodes (`S01E01`…) with empty `audio_url`, so download always failed
+- When forced to download 4.3 MB MP3 from `http://192.168.68.110:8098/.../esp32_24k.mp3`, device hard-faulted during `play_task`
+
+---
+
+## 1. Missing Symbol Loader Failures
+
+### Detected via `xtensa-esp32s3-elf-nm -D …elf | grep " U "`
+
+```
+U lv_font_montserrat_14
+U lv_roller_create
+U lv_roller_set_options
+U lv_roller_get_selected
+U lv_roller_set_selected
+U qsort
+U cJSON_* (via json component)
+```
+
+**Why:**
+- Firmware exports defined in `firmware/Modules/lvgl-module/source/symbols.c` – roller not exported
+- `lv_font_montserrat_14` is a data symbol, not exported (AGENTS.md known missing)
+- `qsort` not in `g_esp_libc_elfsyms` nor `main_symbols`
+- `cJSON` not exported – apps must vendor `cJSON.c` (see `BookPlayer`, `McpScreen`)
+
+**Fix:**
+- `manifest.properties` V1 INI → V2 flat:
+  ```
+  manifest.version=0.2
+  target.sdk=0.8.0-dev
+  target.platforms=esp32s3
+  app.id=one.tactility.discoverymountain
+  app.version.name=0.1.0
+  app.version.code=1
+  ```
+- `main/CMakeLists.txt`:
+  ```cmake
+  set(CJSON_SOURCE "$ENV{IDF_PATH}/components/json/cJSON/cJSON.c")
+  idf_component_register(SRCS ${SOURCE_FILES} ${CJSON_SOURCE}
+                         INCLUDE_DIRS Source "$ENV{IDF_PATH}/components/json/cJSON"
+                         REQUIRES TactilitySDK esp_http_client lwip)
+  ```
+- Replace roller with `lv_dropdown` (exported, see `symbols.c:272-291`)
+- Replace `qsort` with bubble sort
+- Replace `lv_font_montserrat_14` with `lvgl_get_text_font(FONT_SIZE_DEFAULT)` from `tactility/lvgl_fonts.h`
+
+After fix: `nm -D` shows no missing roller/qsort/font, verify script passes.
+
+---
+
+## 2. Fatal `memset` Bug
+
+```c
+memset(&G,0,0); // size 0!
+```
+Static `G` is zero-initialized first boot, but second `onShow` leaves dangling `lv_obj_t*`, `play_handle`, etc.
+
+**Fix:** `memset(&G,0,sizeof(G))`
+
+---
+
+## 3. Blocking LVGL Thread → Watchdog Reboot
+
+Original `onShow`:
+```c
+load_state(); fetch_data(); build_ui();
+```
+`fetch_data()` did 2× `esp_http_client_perform` with 8s timeout + `cJSON_Parse` of 91KB JSON on LVGL thread → 16s block → TWDT.
+
+**Fix:**
+- Build UI immediately with "Fetching..."
+- `xTaskCreate(fetch_task_fn,"dm_fetch",16384, ...)`
+- `fetch_task_fn` does `fetch_data()` in background, then `tt_lvgl_lock` to update labels
+- Same for download: `dl_task` 12288 stack
+
+---
+
+## 4. `esp_http_client` vs Raw Sockets
+
+- `esp_http_client` failed on device for PB `http://192.168.68.110:8095` (returned chunked `1634\r\n{...}`), while `curl --http1.0` returned plain JSON.
+
+Raw socket version via `lwip_socket`, `ipaddr_addr`, `my_htons` (like `RobotArm`) is more reliable and allows PSRAM buffers.
+
+PocketBase:
+- `HTTP/1.1` → `Transfer-Encoding: chunked` → `1634\r\n{...}\r\n0\r\n\r\n`
+- `HTTP/1.0` → `Content-Length` absent, body until close → 5684 bytes seasons, 91293 bytes episodes
+
+**Fix:** Implement `http_get_raw` with:
+- PSRAM `heap_caps_malloc(65536, MALLOC_CAP_SPIRAM|8BIT)` growing to 600KB
+- Manual realloc via malloc+memcpy+free (avoid `heap_caps_realloc` not exported)
+- `strstr(buf,"\r\n\r\n")` to find header end
+- Detect `chunked`, decode hex chunk sizes via `strtol(hex, NULL, 16)`
+- Return de-chunked body
+
+Result: `DM: seasons items count 37`, `episodes items 232` (was fallback 37/6)
+
+---
+
+## 5. Download Buffer & PSRAM
+
+- `dl_ep` used `esp_http_client` + `FILE*` with 2KB stack buf, but also `rename` with static `sd_path()` race
+- 4.3MB MP3 download needs streaming, not full RAM
+- `malloc(600000)` in internal heap (120KB free) → OOM → cache error
+
+**Fix:**
+- `make_sd_path(out,len,slug)` caller-provided buffer
+- `ensure_dir()` does NOT `mkdir("/sdcard")`
+- `dl_ep_raw` uses PSRAM `hdr 8192` + `recv_buf 4096`, streams directly to `FILE*`
+- Progress via `lv_label_set_text` under `tt_lvgl_lock`
+- LRU keeps 8 files, skips current playing
+
+Result: `DL done total 4329701 expected 4329701` – file correctly saved to `/sdcard/dm/`
+
+---
+
+## 6. Audio: I2S Direct vs audio-stream + PSRAM
+
+Original used `i2s_controller_*` directly:
+```c
+device_lock(i2s_dev); i2s_controller_set_config(...); i2s_controller_write(...);
+```
+Conflicts with Audio service, no resampling, `vTaskDelete` while holding lock → deadlock, `samples*2` overflow for mono.
+
+**Fix (from BookPlayer):**
+- `find_audio_device()` via `device_find_by_name("audio-stream")`
+- `audio_stream_open_output(dev, cfg, &handle)`
+- `audio_stream_write(handle, pcm+off, ...)`
+- `close_stream()` via `audio_stream_close`
+- `wait_play_exit()` uses `tt_lvgl_unlock(); vTaskDelay(10); tt_lvgl_lock()` pattern
+- Buffers: `inbuf 16384` + `pcm 1152*2*2` from PSRAM
+- Volume scaling with proper clipping
+- Stack 12288 for play/dl/fetch (was 6144/8192 → overflow on cJSON 91KB)
+- Rate-limit `ui_timer` 500ms, only update bar if `pct != last_pct`
+
+**Playback crash – stack overflow:**
+```
+***ERROR*** A stack overflow in task dm_play has been detected.
+...
+Guru Meditation: BREAK instr at vTaskGenericNotifyGiveFromISR
+...
+PC : 0x40385c6e : vPortYieldFromInt
+```
+Root: `mp3dec_t` (~2KB) + large locals on 8192 stack + `malloc` for buffers + `fread` + `memmove` caused overflow.
+
+**Fix:**
+- Increase `dm_play` stack 8192 → 16384
+- Allocate `mp3dec_t* dec` from PSRAM via `heap_caps_malloc(..., SPIRAM|8BIT)` instead of stack
+- Allocate `inbuf` / `pcm` via `malloc` (internal) first, fallback PSRAM
+- Add ID3v2 skip:
+  ```c
+  uint8_t id3hdr[10];
+  if(fread(id3hdr,1,10,file)==10 && memcmp(id3hdr,"ID3",3)==0){
+    int sz = (id3hdr[6]&0x7F)<<21 | ...;
+    fseek(file, sz+10, SEEK_SET);
+  }
+  ```
+- Add logs `open_stream sr=%d ch=%d`, `open_stream ok`, `decoding frame buffered=%d`
+
+Result after fix:
+```
+DM: play task start /sdcard/dm/463_...mp3 size 4329701
+DM: open_stream sr=16000 ch=1
+esp32_i2s: Configuring I2S pins...
+Adev_Codec: Open codec device OK
+DM: open_stream ok
+```
+Stays alive 50s+ (previously crashed <1s).
+
+### 7. UI Progress Not Showing (user report: "It is playing now, the UI does not show the progress, maybe due to the autoplay.")
+
+Root:
+```c
+G.pos_sec += samples / info.hz; // integer division 1152/16000 = 0!
+```
+`pos_sec` never increments, so `pct = pos_sec*100/total_sec` stays 0, bar never moves. Also `last_pct` not reset on new episode.
+
+**Fix:**
+- Track `total_decoded_samples += samples; G.pos_sec = total_decoded_samples / hz;`
+- Reset `last_pct=-1` in `select_ep` and `start_idx_internal`
+- Keep `ui_timer` 500ms but always update time label, only bar when pct changes
+- Remove auto-play for final stable (user presses Play manually) – auto-play from `fetch_task` caused race with LVGL lock and hid progress issue
+
+After fix, progress bar moves and time label updates `0:01 / 4:30` etc.
+No immediate crash, stays alive 50s+ (previously crashed <1s).
+
+Remaining TODO: test actual audio output via speaker, try 44.1k file if 16k resampling still issues, add `taskYIELD()` and volume ramp to avoid pop.
+
+---
+
+## Build & Deploy (correct env)
+
+Per `AGENTS.md`:
+
+```bash
+cd /Users/adolforeyna/Projects/Tactility/apps
+unset PYTHONPATH; unset PYTHONHOME
+export IDF_PYTHON_ENV_PATH=/Users/adolforeyna/.espressif/python_env/idf5.5_py3.10_env
+source /Users/adolforeyna/esp/esp-idf-v5.5.2/export.sh
+export TACTILITY_SDK_PATH=/Users/adolforeyna/Projects/Tactility/firmware/release/TactilitySDK
+
+$IDF_PYTHON_ENV_PATH/bin/python tactility.py Apps/DiscoveryMountain build esp32s3 --local-sdk
+curl -X PUT http://192.168.68.132/api/apps/install -F "file=@Apps/DiscoveryMountain/build/DiscoveryMountain.app"
+curl -X POST "http://192.168.68.132/api/apps/run?id=one.tactility.discoverymountain"
+# serial
+python3 -c "import serial; s=serial.Serial('/dev/cu.usbmodem101',115200); ..."
+```
+
+Verify symbols:
+```bash
+xtensa-esp32s3-elf-nm -D Apps/DiscoveryMountain/build/cmake-build-esp32s3/DiscoveryMountain.app.elf | grep " U " | grep -E "roller|qsort|montserrat"
+# should be empty
+```
+
+---
+
+## Final State (2026-07-21 post-fix)
+
+- **Stable install:** No `missing symbol`, no `memset` garbage, no watchdog. Boots to launcher, shows UI, stays alive.
+- **Fetch:** `37 seasons / 232 episodes` via raw LWIP sockets + PSRAM 200KB buffer, `HTTP/1.0` to avoid chunked. Previously fallback 6 dummy.
+- **Download:** `DL done total 4329701 expected 4329701` via simple streaming `lwip_recv` → `FILE*` with PSRAM hdr/recv buffers, LRU keeps 8 files. Previously OOM and crash.
+- **Playback:** Fixed stack overflow in `dm_play` (8192 → 16384) + `mp3dec_t` heap allocated + ID3 skip. Now:
+  ```
+  DM: play task start ... size 4329701
+  DM: open_stream sr=16000 ch=1
+  DM: open_stream ok
+  ```
+  No immediate crash, stays alive 50s+. Audio output via `audio_stream` (ES8311) should work, but needs manual play test (auto-play removed for stability).
+- **UI:** Roller → dropdown, font → `lvgl_get_text_font`, no `HideStatusBar` per user request.
+- **Build:** Verified `nm -D` clean, `tactility.py build esp32s3 --local-sdk` ok.
+
+## Verified Logs (final)
+
+```
+DM: fetch task start
+DM: GET .../dm_seasons... → GET ok 5684
+DM: seasons items count 37
+DM: GET .../dm_episodes... → GET ok 91293
+DM: episodes items 232
+DM: fetch done seasons=37 eps=232
+```
+
+---
+
+## TODO
+
+- [ ] Fix playback: skip ID3v2 before decode, try internal RAM for `mp3dec_t`, test with 44.1k mp3 from other episode (not `esp32_24k`)
+- [ ] Use `device_get_by_name` / `device_put` instead of deprecated `find`
+- [ ] Use `tt_app_get_user_data_path` for state file, not hardcoded `/sdcard/apps/...`
+- [ ] Rate-limit screenshot API (2s gap) to avoid heap spike
@@ -0,0 +1,259 @@
+# Discovery Mountain – Download & Playback Crash Report
+
+**Date:** 2026-07-25  
+**Device:** 192.168.68.133 (es3c35p, /dev/cu.usbmodem1101)  
+**App ID:** `one.tactility.discoverymountain` (DM) + `one.tactility.sddownloader` (SDDL) + `one.tactility.mp3player` (MP3)  
+**Firmware:** 0.8.0-dev / IDF 5.5.2 / Tactility SDK 0.8.0-dev
+
+---
+
+## Summary – What is failing: DM or Downloader?
+
+**Both, same root cause: low internal heap (3–7 KB) + unsafe task handling.**
+
+- **DM fetch:** 1st launch OK (37/232), 2nd launch crashes with StoreProhibited.
+- **Downloader (SDDL):** S01E01 dummy (empty URL) causes gui stack overflow, S01E04 34 MB file causes gui overflow + phy_wakeup crash.
+
+---
+
+## 1. Original Download Crash (from your logs)
+
+**Log:** `2026-07-24/cu.usbmodem101_21-42-13_s002.log`
+
+```
+[21:43:39] DM: DL start 396_Wherever_You_Go_S07E01 url ... 36 MB
+[21:43:42] dl header done cl=36147383, wrote initial 1143, streaming
+[21:43:57] W DM: dl timeout 1/12 total=21303/36147383
+[21:43:51] wifi:bcn_timeout,ap_probe_send_start
+[21:44:05] Guru Meditation Error: Core 0 panic'ed (StoreProhibited) PC 0x4038fc5d EXCVADDR 0x05
+Backtrace: 0x4038fc5a 0x400398b5 0x4038bd9d 0x4038d7c9 0x421fdab6
+[21:44:05] WebServerService: GET /api/sysinfo
+```
+
+- Download stalls at 21 KB / 36 MB, 12×15 s timeouts = 3 min blocked in `lwip_recv`
+- `onHide` did `vTaskDelay(100)` then `vTaskDelete(dl_handle)` while still blocked in recv → fd/socket/PSRAM leak → next WebServer request crashes.
+- Also `sdmmc_read_sectors: not enough mem 0x101` seen in many logs – DMA pool 32 KB exhausted.
+
+**Fix applied:**
+- Timeout 15 s → 5 s, max 12 → 5 (25 s max stall)
+- `onHide` graceful wait 2 s fetch / 3 s DL, only force delete after, no leak
+- `recv_buf`/`hdr` 8192 → 4096 PSRAM, `fflush` every 8 chunks, `vTaskDelay(10)` to let SDMMC recover
+- `sin_len = sizeof(sa)`, proper `my_htons` masking
+
+---
+
+## 2. S01E01 – Empty URL + GUI Stack Overflow
+
+**Log:** `cu.usbmodem1101_20-33-06_s008.log`
+
+```
+[20:33:14] DM: connect fail 192.168.68.110:8095 → seasons fallback, episodes fallback → done 37/6
+[20:33:17] DM: Starting external SdDownloader for S01E01 -> /sdcard/dm/S01E01.mp3
+[20:33:17] SDDL: Should autostart has_url=1 has_path=1 url= path=/sdcard/dm/S01E01.mp3
+[20:33:17] xTaskCreate download_task
+***ERROR*** A stack overflow in task gui has been detected.
+Backtrace: 0x40385b29:0x3fcdb9d0 ...
+```
+
+- When PB fetch fails (connect fail), DM falls back to 6 dummy episodes `S01E01`…`S01E06` with **empty `audio_url`**.
+- User presses S01E01 → DM launches SdDownloader with empty URL → `download_one_file` checks `strlen(url)<8` → `Invalid URL` → calls `update_ui_status` + `set_result_and_close(false)` which did `vTaskDelay(1500)` + `tt_app_stop()` **from download_task** → deadlock: onHide waits for download_task, download_task waits in delay, gui task overflows.
+- Also `S01E01.mp3` path exists? No, so it tries download.
+
+**Fix:**
+- `try_external_downloader` now checks `strlen(audio_url)<8` → shows "No URL – fetch failed?" and returns false, no launch
+- `btn_dl_season_cb` filters `strlen>=8`
+- `SdDownloader` `set_result_and_close` no longer calls `tt_app_stop()` from download_task (just sets result, leaves app to be closed via Cancel button) → no deadlock
+- `SdDownloader` download_task stack 16384 → 8192 to save heap
+
+**User note:** "That episode should be on sd card already" – real S01E01 is `463_Discovering_Discovery_Mountain_S01E01.mp3` (4.3 MB), not dummy `S01E01.mp3`. Real file exists, dummy does not.
+
+---
+
+## 3. S01E04 – 34 MB File, GUI Stack Overflow on DL Start
+
+**Log:** `cu.usbmodem1101_20-26-11_s006.log`
+
+```
+[20:28:43] DM: Starting external SdDownloader for 460_The_Lookout...S01E04 -> /sdcard/dm/460_...mp3
+[20:28:43] SDDL: Should autostart url=http://.../460_...mp3 path=/sdcard/dm/460_...mp3
+[20:28:43] xTaskCreate download_task res=1 handle=0x3fcc3f08
+
+***ERROR*** A stack overflow in task gui
+```
+
+- S01E04 is 34 MB (`file_size 34460594`). Download task created, but gui task overflows immediately, before any DL log.
+- Root: `lru_check` had `FE files[200]` → 200*304=60 KB on stack of download_task (12 KB stack) → overflow. Also `sort_eps` had `EpInfo t` 500 bytes on stack inside double loop.
+- `ensure_parent_dir` had 512+512 stack, `req[512]`, etc.
+
+**Fix:**
+- `lru_check`: `files` allocated from PSRAM via `heap_caps_malloc(200*sizeof(FE))`
+- `sort_eps`: temp `EpInfo t` allocated from PSRAM
+- `ensure_parent_dir`: rewritten without `strtok_r` (not exported) and without large stack, using manual parsing and `strncat`
+- Download task stack 16K → 8K, fetch task stays 12K, heap check before socket.
+
+---
+
+## 4. DM Second Launch – StoreProhibited 0x8208775e
+
+**Log:** `..._17-37-00_s015.log` (latest after clean build)
+
+```
+[20:54:50] fetch done seasons=37 eps=232
+[20:55:39] onShow heap before fetch: internal=50455 psram=4567656
+[20:55:39] xTaskCreate fetch_task res=1 handle=0x3fcc5110
+[20:55:39] fetch task start → seasons 723 ok
+[20:55:39] GET ...page=1 → 9875 ok → got 50
+[20:55:39] Guru StoreProhibited PC 0x4238a8c0 EXCVADDR 0x8208775e
+Backtrace: 0x4238a8bd(app) 0x420874f3(lv_timer.c:107) 0x42069754(esp_lvgl_port.c:242) 0x421fdaba(port.c:139)
+```
+
+- 1st fetch after boot OK, 2nd fetch (app reopened) crashes 11 ms after first page GET, before header_end.
+- Backtrace shows crash in **LVGL timer task**, not fetch task: `lv_timer.c:107` → `ui_timer`
+- `ui_timer` (200 ms) was doing heavy work: `save_current_ep_pos()` + `save_state()` (cJSON create, print, fopen, fwrite) every 5 sec when playing. Called from GUI task with limited stack → StoreProhibited when trying to write to flash 0x82... (string literal in flash?).
+- Also `G` global is 240 KB (400*492) BSS in DRAM, plus `saved_pos` 40 KB = 280 KB, leaving free heap 50 KB → after first fetch cJSON 10 KB nodes, heap fragments to 3-7 KB → `MemoryChecker: Internal memory low: 3607/7279/7435`
+
+**Fix:**
+- `ui_timer`: early return if `G.fetching`, remove periodic `save_state()` (saving is done explicitly in `select_ep`, `go_next`, `onHide`, `onResult`)
+- `AppCtx.MAX_EPS` 400→250, `title` 128→64, `audio_url` 256→128, `MP3_BUF` 16384→4096 → size 240 KB → ~100 KB
+- `fetch_task` stack 16384→12288, `onShow` heap log, `xTaskCreate` result log
+- Pagination 100/page → 50/page (now 25/page) with 300-400 ms delay between pages to let heap recover, `fields=season_num` and `fields=title,slug,season_num,episode_num,audio_url` to cut JSON 91 KB → 42 KB → 9 KB/page
+
+---
+
+## 5. DL Season Button – IntegerDivideByZero in Bundle
+
+**Log:** `cu.usbmodem1101_16-57-59_s014.log`
+
+```
+[17:34:06] episodes page 1 got 50 items
+[17:34:06] Guru IntegerDivideByZero PC 0x42014cf3
+Backtrace: 0x42014cf0(hashtable_policy.h:534) 0x42014dac(unordered_map.h:988) 0x42014345(tt_bundle.cpp:46 putInt32) 0x4237a4d3(app)
+```
+
+- Pressing **DL Season** during fetch → `G.ep_cnt` only 50 (partial), `G.fetching` true, but button didn't check fetching → `btn_dl_season_cb` called `tt_bundle_alloc` + 20× `putString` (url+path) while internal heap low from cJSON → `unordered_map` bucket_count=0 → `% bucket_count` → divide by zero.
+
+**Fix:**
+- `btn_seasons_cb` and `btn_dl_season_cb` now check `if(G.fetching) return;`
+- `btn_dl_season_cb`: `missing_idx[50]` → `[10]` to avoid LVGL stack overflow, heap check `>15 KB` before alloc, and per-put heap check `>8 KB` else abort with "Low memory, try 1 by 1"
+- Also filters `strlen(audio_url)>=8`
+
+---
+
+## 6. Play Button – Now Opens Mp3Player, Returns Timestamp
+
+**Previous:** DM had internal `play_task` using `audio_stream` directly. User reported "pres play nothing happened" because audio-stream device not found when launched from DM (DM still held it).
+
+**Fix in `player.c`:**
+```c
+stop_playback_sync(); wait_play_exit(); close_overlay();
+BundleHandle b = tt_bundle_alloc();
+putString("file", fpath); putInt32("pos_sec", saved);
+tt_app_start_with_bundle("one.tactility.mp3player", b);
+```
+- `onResult` in DM now handles Mp3Player return:
+  - `optInt32("pos_sec"/"timestamp")` → `set_saved_pos_for_slug`
+  - Updates UI `S01 E02 * • 0:07`, `Resume – tap Play`
+  - No autoplay after DL or after Mp3Player (per request)
+
+**Mp3Player (`one.tactility.mp3player`) fixes:**
+- Retry finding audio device 5×200 ms (was failing when launched from DM)
+- Tracks `pos_sec = total_decoded_samples / hz`, `total_sec` estimate
+- `onHide` returns bundle `pos_sec`, `timestamp`, `file`, `finished`, `success`
+- `onHide` now closes audio stream **before** alloc result to free heap, frees buffers before bundle, only puts 2 ints to avoid OOM, no SD file write in low heap
+
+**Tested on 133:**
+```
+[20:03:30] DM: Launching Mp3Player for /sdcard/dm/463_...mp3 pos 4
+[20:03:31] Mp3Player: Found audio-stream device 0x3fca480c
+[20:03:31] Starting MP3 playback size 4329701 resume=4
+[20:03:31] Audio stream opened 16000 Hz, 1 ch
+[20:03:56] onHide start pos_sec=15
+[20:03:59] Set result bundle pos_sec=15
+[20:03:59] onHide returning pos_sec=15 total_sec=269
+[20:03:59] DM: onResult result=1 pending_idx=0 cur_idx=0 → saved pos 15
+```
+
+---
+
+## 7. SdDownloader – Now Batch + Headless (per your latest spec)
+
+**Manifest:** `one.tactility.sddownloader`, 30 KB, 0 missing symbols
+
+**UI:** Only bar, `% (3/10)`, detail `x / y KB`, URL/path labels read-only, status, Cancel. No input fields.
+
+**Args via bundle (no manual input):**
+- Single: `url`, `path`, `override` bool (default false → fail if exists)
+- Batch (full season): `count` int, `url_0`/`path_0` … `url_n`/`path_n`, `override` bool
+- Example from DM `btn_dl_season_cb`:
+```c
+bundle.putInt32("count", 7);
+putString("url_0", "http://.../S02E01.mp3"); putString("path_0", "/sdcard/dm/...");
+...
+tt_app_start_with_bundle("one.tactility.sddownloader", b);
+```
+
+**Returns bool:**
+```c
+bundle.putBool("success", true/false);
+putInt32("success_count"), "fail_count", "total_count", "bytes", "path", "error"
+setResult(OK/ERROR, bundle)
+```
+DM `onResult` shows `DL: X ok, Y fail` and refreshes `seen` flags.
+
+**Robustness:**
+- 8 KB stack (was 16 KB), 4 KB PSRAM buf, 15 s timeout, 5 retries
+- `ensure_parent_dir` mkdir -p without `strtok` (not exported)
+- `stat` check for exists → fail if not override
+- No `tt_app_stop()` from download task (caused deadlock + gui stack overflow for S01E01 empty URL)
+
+---
+
+## Current Builds on 133
+
+- `DiscoveryMountain.app` 80 KB (was 70 KB) – entry 0x4237543c, 118 undef, 0 missing – 37/232 fetch, seasons dropdown works, no autoplay, DL Season 10 max, external Mp3Player/SdDownloader, no fullscreen covering (root now child of parent, overlays closed before launch)
+- `SdDownloader.app` 30 KB – 74 undef, 0 missing – batch 10, file-exists check
+- `Mp3Player.app` 40 KB – 0 missing after adding `esp_http_client` to REQUIRES – returns timestamp
+
+---
+
+## Still Open / Next
+
+- Second fetch after app restart still StoreProhibited at 0x4238a8c0 (PC in app) during first page GET – likely `cJSON_Parse` + `has_slug` stat + low heap after first fetch. Mitigation: reduce `MAX_EPS` further or move `G` to PSRAM with `EXT_RAM_ATTR` (tried, caused other crash), or free `G.eps` between fetches.
+- S01E01 dummy fallback (empty URL) now shows "No URL – fetch failed?" instead of crash, but ideally should never appear if fetch succeeds. Ensure PB at `192.168.68.110:8095` is reachable (seen `connect fail` when WiFi bcn_timeout).
+- Mp3Player close takes 2.5 s (force delete after 50 tries) – should be optimized to not need force delete.
+
+---
+
+## Reproduction Steps for S01E04 Crash (you reported)
+
+1. Clean fetch fails → fallback 37/6 dummy episodes `S01E01`…`S01E06` with empty URL
+2. Press S01E01 → DM tries external DL with empty URL → SDDL `url=` empty → `Invalid URL` → `set_result_and_close` did `tt_app_stop()` from download task → deadlock → gui stack overflow
+
+Fixed by: empty URL check in `try_external_downloader` + `btn_dl_season_cb` + removing `tt_app_stop()` from download task.
+
+For real S01E04 (34 MB, `460_...`), previous crash was gui stack overflow right after `xTaskCreate` – fixed by reducing download_task stack 16K→8K and moving `files[200]` 60KB array from stack to PSRAM in `lru_check`.
+
+---
+
+## Files Changed
+
+- `Apps/DiscoveryMountain/main/Source/app_context.c` – added `pending_dl_idx`, `root`
+- `app_context.h` – reduced `MAX_EPS` 400→250, `MP3_BUF` 16K→4K, `title` 128→64, `audio_url` 256→128, added `root`, `pending_dl_idx`, batch fields in SDDL
+- `network.c` – 50/page pagination (was 400), fields filter, 8K internal buf, detailed logs for connect
+- `storage.c` – `sort_eps` temp from PSRAM, `lru_check` files from PSRAM (was 60KB stack)
+- `download.c` – stubbed to only overlays (internal DL removed)
+- `player.c` – simplified to only external launchers, no internal `play_task`, added `download_season()`
+- `ui.c` – `build_ui(parent)` uses parent, not `scr_act()`, root stored, 2 buttons 48% (Seasons + DL Season), `ui_timer` early return if fetching, `btn_dl_season_cb` with heap checks
+- `main.c` – onShow heap log, xTaskCreate 12288, onResult handles both Mp3Player timestamp and SdDownloader batch, onHide does NOT clear `pending_dl_idx`, deletes root
+- `SdDownloader/main/Source/main.c` – new app, batch support, file-exists + override logic, returns bool
+- `Mp3Player/main/Source/main.c` – returns `pos_sec`/`timestamp`, retry audio device, auto-finds test file if no bundle
+
+---
+
+## How to Test Full Season Download
+
+1. Open DM → wait `fetch done 37/232`
+2. Tap `Seasons` → S01 → tap `DL Season`
+3. Should show `Starting DL 6 eps S01` → launches SDDL → bar shows `3/6: 45%` etc.
+4. On finish, DM shows `DL: 6 ok, 0 fail` and refreshes `*` markers
+5. Tap episode with `*` → Play → launches Mp3Player → plays from saved pos → close → DM shows `Resume • 0:12`
@@ -4,5 +4,5 @@ set(CJSON_SOURCE "$ENV{IDF_PATH}/components/json/cJSON/cJSON.c")
 idf_component_register(
    SRCS ${SOURCE_FILES} ${CJSON_SOURCE}
    INCLUDE_DIRS Source "$ENV{IDF_PATH}/components/json/cJSON"
-    REQUIRES TactilitySDK lwip
+    REQUIRES TactilitySDK esp_http_client lwip
 )
@@ -0,0 +1,3 @@
+#include "app_context.h"
+
+AppCtx G = {0};
@@ -0,0 +1,113 @@
+#pragma once
+
+#include <tt_lvgl.h>
+#include <tt_lvgl_toolbar.h>
+#include <lvgl.h>
+#include <tactility/lvgl_fonts.h>
+#include <tactility/device.h>
+#include <tactility/drivers/audio_stream.h>
+#include "freertos/FreeRTOS.h"
+#include "freertos/task.h"
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#define TAG "DM"
+#define PB "http://192.168.68.110:8095"
+#define DM_DIR "/sdcard/dm"
+#define STATE_PATH "/sdcard/apps/one.tactility.discoverymountain/userdata/state.json"
+#define CACHE_PATH "/sdcard/apps/one.tactility.discoverymountain/userdata/cache.json"
+#define MAX_SEASONS 40
+#define MAX_EPS 250
+#define MP3_BUF 4096
+
+typedef struct { int num; } SeasonInfo;
+typedef struct {
+    char title[64];
+    char slug[96];
+    int season;
+    int ep_num;
+    char audio_url[128];
+    bool seen;
+} EpInfo;
+
+typedef struct { char slug[96]; int pos; } SavedPos;
+
+typedef struct {
+    SeasonInfo seasons[MAX_SEASONS];
+    int season_cnt;
+    EpInfo eps[MAX_EPS];
+    int ep_cnt;
+    int cur_season;
+    int cur_ep_idx;
+    struct Device* stream_dev;
+    AudioStreamHandle stream_handle;
+    bool is_playing;
+    bool is_paused;
+    bool need_stop;
+    TaskHandle_t play_handle;
+    TaskHandle_t fetch_handle;
+    TaskHandle_t dl_handle;
+    int pos_sec;
+    int total_sec;
+    int volume;
+    int last_pct;
+    lv_obj_t *root;
+    lv_obj_t *lbl_title, *lbl_meta, *bar, *lbl_time, *lbl_status, *btn_play;
+    lv_obj_t *lbl_season;
+    lv_obj_t *ep_list_cont;
+    lv_obj_t *btn_seasons;
+    lv_obj_t *btn_dl_missing;
+    lv_obj_t *overlay, *dropdown;
+    lv_obj_t *season_list_cont;
+    lv_timer_t *ui_timer_handle;
+    // Download UI
+    lv_obj_t *dl_overlay;
+    lv_obj_t *dl_bar;
+    lv_obj_t *dl_lbl_pct;
+    lv_obj_t *dl_lbl_detail;
+    lv_obj_t *dl_lbl_title;
+    lv_obj_t *dl_lbl_sub;
+    char cur_title[128];
+    char last_slug[96];
+    bool fetching;
+    bool downloading;
+    volatile int dl_total;
+    int dl_expected;
+    int dl_last_ui_update;
+    volatile bool dl_cancel_req;
+    volatile bool fetch_cancel_req;
+    char dl_ep_title[128];
+    char dl_slug[96];
+    int dl_season;
+    int dl_ep_num;
+    int dl_last_pct;
+    // Per-episode resume
+    SavedPos saved_pos[MAX_EPS];
+    int saved_pos_cnt;
+    int last_save_tick;
+
+    // External downloader integration (SdDownloader)
+    int pending_dl_idx;
+
+    // Full season download queue (sequential single-file to avoid batch crash)
+    bool dl_missing_active;
+    int dl_missing_season;
+    int dl_missing_total;
+    int dl_missing_done;
+    int dl_missing_failed;
+
+    // Refresh button reference
+    lv_obj_t *btn_refresh;
+} AppCtx;
+
+void trigger_manual_refresh(void);
+void dm_preserve_season(int season);
+int dm_consume_preserved_season(void);
+
+extern AppCtx G;
+
+#ifdef __cplusplus
+}
+#endif
@@ -0,0 +1,49 @@
+#include "download.h"
+#include "storage.h"
+#include <tt_lvgl.h>
+#include <string.h>
+#include "esp_log.h"
+
+// Simplified: internal download removed, we use external SdDownloader app
+// Keep overlay functions as stubs for compatibility, but they do minimal
+
+void hide_dl_overlay(){
+    if(G.dl_overlay){
+        lv_obj_delete(G.dl_overlay);
+        G.dl_overlay=NULL;
+        G.dl_bar=NULL;
+        G.dl_lbl_pct=NULL;
+        G.dl_lbl_detail=NULL;
+        G.dl_lbl_title=NULL;
+        G.dl_lbl_sub=NULL;
+    }
+    G.downloading=false;
+}
+
+void show_dl_overlay_locked(const char* ep_title, const char* slug, int season, int ep_num){
+    // No longer used - external downloader has its own UI
+    // Keep as stub that shows simple status
+    (void)ep_title; (void)slug; (void)season; (void)ep_num;
+    G.downloading=true;
+}
+
+void update_dl_overlay_ui(){
+    // No internal download progress anymore
+}
+
+bool dl_ep_raw(EpInfo* ep){
+    (void)ep;
+    return false;
+}
+
+bool dl_ep(EpInfo* ep){
+    (void)ep;
+    return false;
+}
+
+void dl_task(void* arg){
+    (void)arg;
+    G.downloading=false;
+    G.dl_handle=NULL;
+    vTaskDelete(NULL);
+}
@@ -0,0 +1,24 @@
+#pragma once
+
+#include "app_context.h"
+#include <stdbool.h>
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+// Raw download to file with progress tracking
+bool dl_ep_raw(EpInfo* ep);
+bool dl_ep(EpInfo* ep);
+
+// Download task
+void dl_task(void* arg);
+
+// Download overlay UI
+void hide_dl_overlay(void);
+void show_dl_overlay_locked(const char* ep_title, const char* slug, int season, int ep_num);
+void update_dl_overlay_ui(void);
+
+#ifdef __cplusplus
+}
+#endif
@@ -0,0 +1,491 @@
+#include <tt_app.h>
+#include <tt_lvgl.h>
+#include <tt_bundle.h>
+#include "app_context.h"
+#include "storage.h"
+#include "network.h"
+#include "download.h"
+#include "player.h"
+#include "ui.h"
+
+#include <string.h>
+#include "freertos/FreeRTOS.h"
+#include "freertos/task.h"
+#include "esp_log.h"
+#include "esp_heap_caps.h"
+
+// Preserved browsing season that survives G memset across external app launch/return
+// This fixes season reset to 1 when returning from player/downloader where file read may race
+static int s_preserved_season = -1;
+
+void dm_preserve_season(int season){
+    if(season>0) s_preserved_season = season;
+}
+int dm_consume_preserved_season(void){
+    int s = s_preserved_season;
+    s_preserved_season = -1;
+    return s;
+}
+
+static void fetch_task_fn(void* arg){
+    (void)arg;
+    G.fetching=true;
+    G.fetch_cancel_req=false;
+    ESP_LOGI(TAG,"fetch task start (manual refresh)");
+
+    tt_lvgl_lock(portMAX_DELAY);
+    if(G.lbl_status) lv_label_set_text(G.lbl_status,"Fetching from network...");
+    tt_lvgl_unlock();
+
+    // Preserve user's current season selection across fetch
+    int preserved_season = G.cur_season;
+    char preserved_slug[96]={0};
+    if(G.cur_ep_idx>=0 && G.cur_ep_idx < G.ep_cnt){
+        strncpy(preserved_slug, G.eps[G.cur_ep_idx].slug, sizeof(preserved_slug)-1);
+    } else if(strlen(G.last_slug)>0){
+        strncpy(preserved_slug, G.last_slug, sizeof(preserved_slug)-1);
+    }
+
+    bool fetch_ok = fetch_data();
+
+    if(G.fetch_cancel_req){
+        ESP_LOGI(TAG,"fetch task canceled");
+        G.fetching=false;
+        G.fetch_handle=NULL;
+        vTaskDelete(NULL);
+        return;
+    }
+
+    if(fetch_ok){
+        ESP_LOGI(TAG,"Network fetch ok: %d seasons, %d eps – saving cache", G.season_cnt, G.ep_cnt);
+        save_cache();
+    } else {
+        ESP_LOGW(TAG,"Network fetch failed");
+        // Do not overwrite current data if fetch fails – keep existing cache in memory
+        // If we have no data at all, fetch_data already created fallback
+    }
+
+    ESP_LOGI(TAG,"fetch done seasons=%d eps=%d fetch_ok=%d", G.season_cnt, G.ep_cnt, fetch_ok);
+
+    // Restore preserved season if it still exists
+    if(preserved_season>0){
+        bool season_exists=false;
+        for(int i=0;i<G.season_cnt;i++) if(G.seasons[i].num==preserved_season){ season_exists=true; break; }
+        if(season_exists){
+            G.cur_season = preserved_season;
+            // try to restore slug within preserved season
+            int best=-1;
+            if(strlen(preserved_slug)>0){
+                for(int i=0;i<G.ep_cnt;i++) if(G.eps[i].season==preserved_season && strcmp(G.eps[i].slug,preserved_slug)==0){ best=i; break; }
+            }
+            if(best==-1){
+                for(int i=0;i<G.ep_cnt;i++) if(G.eps[i].season==preserved_season){ best=i; break; }
+            }
+            if(best!=-1) G.cur_ep_idx=best;
+            strncpy(G.last_slug, preserved_slug, sizeof(G.last_slug)-1);
+        } else {
+            // Fallback to preserved slug or first
+            if(strlen(preserved_slug)>0){
+                for(int i=0;i<G.ep_cnt;i++) if(strcmp(G.eps[i].slug,preserved_slug)==0){ G.cur_ep_idx=i; G.cur_season=G.eps[i].season; break; }
+            }
+            if(G.cur_ep_idx<0 && G.ep_cnt>0){
+                G.cur_ep_idx=0;
+                G.cur_season=G.eps[0].season;
+            }
+        }
+    } else {
+        if(G.cur_ep_idx<0 && G.ep_cnt>0){
+            G.cur_ep_idx=0;
+            G.cur_season=G.eps[0].season;
+        }
+    }
+
+    G.fetching=false;
+
+    tt_lvgl_lock(portMAX_DELAY);
+    if(G.fetch_cancel_req){
+        tt_lvgl_unlock();
+        G.fetch_handle=NULL;
+        vTaskDelete(NULL);
+        return;
+    }
+    tt_lvgl_unlock();
+
+    ui_rebuild_episode_list();
+
+    if(G.ep_cnt>0 && G.cur_ep_idx>=0){
+        EpInfo* ep=&G.eps[G.cur_ep_idx];
+        int saved = get_saved_pos_for_slug(ep->slug);
+        if(saved==0) saved = G.pos_sec;
+        if(saved>0) G.pos_sec=saved;
+    }
+
+    tt_lvgl_lock(portMAX_DELAY);
+    if(G.lbl_status){
+        if(G.ep_cnt>0){
+            if(fetch_ok) lv_label_set_text(G.lbl_status, "Refreshed – select episode");
+            else lv_label_set_text(G.lbl_status, "Refresh failed – using cache");
+        } else {
+            lv_label_set_text(G.lbl_status,"No data – check network");
+        }
+    }
+    tt_lvgl_unlock();
+
+    G.fetch_handle=NULL;
+    save_state();
+    vTaskDelete(NULL);
+}
+
+void trigger_manual_refresh(void){
+    if(G.fetching){
+        ESP_LOGI(TAG,"refresh already in progress");
+        return;
+    }
+    if(G.fetch_handle){
+        ESP_LOGW(TAG,"fetch handle still present, not starting new");
+        return;
+    }
+    G.fetch_cancel_req=false;
+    size_t free_internal = heap_caps_get_free_size(MALLOC_CAP_INTERNAL);
+    size_t free_psram = heap_caps_get_free_size(MALLOC_CAP_SPIRAM);
+    ESP_LOGI(TAG,"trigger_manual_refresh heap: internal=%d psram=%d", free_internal, free_psram);
+    BaseType_t res = xTaskCreate(fetch_task_fn,"dm_fetch",12288,NULL,5,&G.fetch_handle);
+    ESP_LOGI(TAG,"xTaskCreate manual refresh res=%d handle=%p", res, G.fetch_handle);
+    if(res != pdPASS){
+        tt_lvgl_lock(portMAX_DELAY);
+        if(G.lbl_status) lv_label_set_text(G.lbl_status,"Failed to start refresh");
+        tt_lvgl_unlock();
+        G.fetch_handle=NULL;
+    }
+}
+
+static void onShow(AppHandle app, void* data, lv_obj_t* parent){
+    (void)app; (void)data; (void)parent;
+    // Check for preserved season from external app launch (survives G memset)
+    int preserved = dm_consume_preserved_season();
+    if(preserved>0){
+        ESP_LOGI(TAG,"onShow preserved season S%02d from previous launch", preserved);
+    }
+
+    memset(&G,0,sizeof(G));
+    G.pos_sec=0;
+    G.total_sec=0;
+    G.cur_season=1;
+    G.cur_ep_idx=-1;
+    G.pending_dl_idx=-1;
+    G.volume=80;
+    G.last_pct=-1;
+    G.dl_last_pct=-1;
+    G.dl_expected=-1;
+    G.fetch_cancel_req=false;
+    G.dl_cancel_req=false;
+    ensure_dir();
+    load_state();
+
+    // If we have a preserved season from launching player/downloader, it overrides file
+    if(preserved>0){
+        G.cur_season = preserved;
+        ESP_LOGI(TAG,"onShow overriding cur_season with preserved S%02d", preserved);
+    }
+
+    build_ui(parent);
+
+    // Instant cache load – no network, fully synchronous for fast startup
+    // NOTE: load_state() already loaded last_season (browsing season) and last_slug (last played)
+    // We want to preserve browsing season, NOT overwrite it with last_slug's season.
+    bool cache_loaded = load_cache();
+    if(cache_loaded){
+        ESP_LOGI(TAG,"Cache loaded instantly: %d seasons, %d eps browsing S%02d last_slug=%s preserved=%d", G.season_cnt, G.ep_cnt, G.cur_season, G.last_slug, preserved);
+        // Validate browsing season still exists, otherwise fallback to first season
+        bool season_exists=false;
+        for(int i=0;i<G.season_cnt;i++) if(G.seasons[i].num==G.cur_season){ season_exists=true; break; }
+        if(!season_exists){
+            // If we had a preserved season but it's not in seasons list, maybe list incomplete – try preserved again
+            if(preserved>0){
+                for(int i=0;i<G.season_cnt;i++) if(G.seasons[i].num==preserved){ season_exists=true; G.cur_season=preserved; break; }
+            }
+            if(!season_exists && G.season_cnt>0){
+                ESP_LOGW(TAG,"Browsing season S%02d not found in cache, fallback to S%02d", G.cur_season, G.seasons[0].num);
+                G.cur_season = G.seasons[0].num;
+                season_exists=true;
+            }
+        }
+        // Resolve cur_ep_idx: prefer last_slug if it is within browsing season, otherwise first ep in browsing season
+        G.cur_ep_idx=-1;
+        if(strlen(G.last_slug)>0 && season_exists){
+            for(int i=0;i<G.ep_cnt;i++) if(G.eps[i].season==G.cur_season && strcmp(G.eps[i].slug,G.last_slug)==0){ G.cur_ep_idx=i; break; }
+        }
+        if(G.cur_ep_idx<0){
+            for(int i=0;i<G.ep_cnt;i++) if(G.eps[i].season==G.cur_season){ G.cur_ep_idx=i; break; }
+        }
+        if(G.cur_ep_idx<0 && G.ep_cnt>0){
+            G.cur_ep_idx=0;
+            G.cur_season=G.eps[0].season;
+        }
+        ui_rebuild_episode_list();
+        tt_lvgl_lock(portMAX_DELAY);
+        if(G.lbl_status) lv_label_set_text(G.lbl_status,"Loaded from cache – tap Refresh to update");
+        tt_lvgl_unlock();
+    } else {
+        ESP_LOGI(TAG,"No cache at startup, cur_season S%02d preserved %d", G.cur_season, preserved);
+        tt_lvgl_lock(portMAX_DELAY);
+        if(G.lbl_status) lv_label_set_text(G.lbl_status,"No cache – tap Refresh");
+        tt_lvgl_unlock();
+        ui_rebuild_episode_list();
+    }
+
+    // Final safeguard: if preserved was set, ensure it is saved back to state file so next open keeps it
+    if(preserved>0){
+        save_state();
+    }
+
+    size_t free_internal = heap_caps_get_free_size(MALLOC_CAP_INTERNAL);
+    size_t free_psram = heap_caps_get_free_size(MALLOC_CAP_SPIRAM);
+    ESP_LOGI(TAG, "onShow heap after cache load: internal=%d psram=%d cache=%d cur_season=%d", free_internal, free_psram, cache_loaded, G.cur_season);
+}
+
+static void onResult(AppHandle app, void* data, AppLaunchId launchId, AppResult result, BundleHandle resultData){
+    (void)app; (void)data; (void)launchId;
+    ESP_LOGI(TAG, "onResult: result=%d pending_idx=%d cur_idx=%d", result, G.pending_dl_idx, G.cur_ep_idx);
+
+    // Check if result contains timestamp from Mp3Player
+    if (resultData) {
+        int32_t pos = 0;
+        bool has_pos = false;
+        if (tt_bundle_opt_int32(resultData, "pos_sec", &pos) ||
+            tt_bundle_opt_int32(resultData, "timestamp", &pos) ||
+            tt_bundle_opt_int32(resultData, "position", &pos)) {
+            has_pos = true;
+        }
+
+        char file_path[512]={0};
+        bool has_file = tt_bundle_opt_string(resultData, "file", file_path, sizeof(file_path)) ||
+                        tt_bundle_opt_string(resultData, "path", file_path, sizeof(file_path));
+
+        if (has_pos) {
+            ESP_LOGI(TAG, "Mp3Player returned pos %d sec for file %s", pos, has_file?file_path:"unknown");
+            int target_idx = -1;
+            if (has_file && strlen(file_path)>0) {
+                for(int i=0;i<G.ep_cnt;i++){
+                    char ep_path[300];
+                    make_sd_path(ep_path, sizeof(ep_path), G.eps[i].slug);
+                    if (strcmp(ep_path, file_path)==0) { target_idx = i; break; }
+                }
+            }
+            if (target_idx<0 && G.pending_dl_idx>=0 && G.pending_dl_idx < G.ep_cnt) target_idx = G.pending_dl_idx;
+            if (target_idx<0 && G.cur_ep_idx>=0) target_idx = G.cur_ep_idx;
+
+            if (target_idx>=0) {
+                bool finished = false;
+                tt_bundle_opt_bool(resultData, "finished", &finished);
+                int32_t total_sec = 0;
+                tt_bundle_opt_int32(resultData, "total_sec", &total_sec);
+                if (finished || (total_sec>0 && pos >= total_sec-10)) {
+                    set_saved_pos_for_slug(G.eps[target_idx].slug, 0);
+                    G.pos_sec = 0;
+                    ESP_LOGI(TAG, "Episode %s finished, clearing pos", G.eps[target_idx].slug);
+                } else {
+                    set_saved_pos_for_slug(G.eps[target_idx].slug, pos);
+                    G.pos_sec = pos;
+                    ESP_LOGI(TAG, "Saved pos %d for %s", pos, G.eps[target_idx].slug);
+                }
+                save_state();
+                ui_rebuild_episode_list();
+                tt_lvgl_lock(portMAX_DELAY);
+                if (G.lbl_status) {
+                    if (pos>5) lv_label_set_text(G.lbl_status,"Progress saved – tap episode to resume");
+                    else lv_label_set_text(G.lbl_status,"Select episode to play / download");
+                }
+                tt_lvgl_unlock();
+            }
+            G.pending_dl_idx = -1;
+            return;
+        }
+    }
+
+    // SdDownloader batch result handling
+    if (G.pending_dl_idx <0 || G.pending_dl_idx >= G.ep_cnt) {
+        if (resultData) {
+            int32_t succ=0, fail=0, total=0;
+            if (tt_bundle_opt_int32(resultData, "success_count", &succ) ||
+                tt_bundle_opt_int32(resultData, "total_count", &total)) {
+                tt_bundle_opt_int32(resultData, "fail_count", &fail);
+                ESP_LOGI(TAG, "Batch DL result: success %ld fail %ld total %ld", (long)succ, (long)fail, (long)total);
+                for(int i=0;i<G.ep_cnt;i++) G.eps[i].seen = has_slug(G.eps[i].slug);
+                save_state();
+                ui_rebuild_episode_list();
+                tt_lvgl_lock(portMAX_DELAY);
+                if (G.lbl_status) {
+                    char msg[64];
+                    snprintf(msg,sizeof(msg),"DL: %ld ok, %ld fail", (long)succ, (long)fail);
+                    lv_label_set_text(G.lbl_status, msg);
+                }
+                tt_lvgl_unlock();
+                G.pending_dl_idx = -1;
+                return;
+            }
+        }
+        G.pending_dl_idx = -1;
+        // Still refresh list in case files appeared
+        for(int i=0;i<G.ep_cnt;i++) G.eps[i].seen = has_slug(G.eps[i].slug);
+        ui_rebuild_episode_list();
+        return;
+    }
+
+    // Single download result
+    bool success = false;
+    if (resultData) {
+        tt_bundle_opt_bool(resultData, "success", &success);
+    }
+    if (result == APP_RESULT_OK) {
+        if (resultData) {
+            bool b=false;
+            if (tt_bundle_opt_bool(resultData, "success", &b)) success = b;
+            else success = true;
+        } else {
+            success = true;
+        }
+    }
+
+    int idx = G.pending_dl_idx;
+    G.pending_dl_idx = -1;
+
+    for(int i=0;i<G.ep_cnt;i++) G.eps[i].seen = has_slug(G.eps[i].slug);
+    save_state();
+    ui_rebuild_episode_list();
+
+    // Handle sequential full-season download queue (safe single-file mode)
+    if(G.dl_missing_active){
+        if(success) G.dl_missing_done++;
+        else G.dl_missing_failed++;
+
+        int next = find_next_missing_in_season(G.dl_missing_season);
+        if(next!=-1){
+            ESP_LOGI(TAG, "Batch queue continuing: %d/%d done, next idx %d", G.dl_missing_done, G.dl_missing_total, next);
+            tt_lvgl_lock(portMAX_DELAY);
+            if(G.lbl_status){
+                char msg[64];
+                snprintf(msg,sizeof(msg),"DL %d/%d S%02d...", G.dl_missing_done+1, G.dl_missing_total, G.dl_missing_season);
+                lv_label_set_text(G.lbl_status, msg);
+            }
+            tt_lvgl_unlock();
+            // Small delay to let UI update before launching next downloader
+            vTaskDelay(pdMS_TO_TICKS(300));
+            if(download_episode(next)){
+                // started next
+                return;
+            } else {
+                // failed to start next, abort queue
+                G.dl_missing_active=false;
+                tt_lvgl_lock(portMAX_DELAY);
+                if(G.lbl_status){
+                    char msg[64];
+                    snprintf(msg,sizeof(msg),"DL stopped %d ok %d fail", G.dl_missing_done, G.dl_missing_failed);
+                    lv_label_set_text(G.lbl_status, msg);
+                }
+                tt_lvgl_unlock();
+                return;
+            }
+        } else {
+            // No more missing – queue finished
+            ESP_LOGI(TAG, "Batch queue finished: %d ok %d fail", G.dl_missing_done, G.dl_missing_failed);
+            G.dl_missing_active=false;
+            tt_lvgl_lock(portMAX_DELAY);
+            if(G.lbl_status){
+                char msg[64];
+                snprintf(msg,sizeof(msg),"DL S%02d done %d ok %d fail", G.dl_missing_season, G.dl_missing_done, G.dl_missing_failed);
+                lv_label_set_text(G.lbl_status, msg);
+            }
+            tt_lvgl_unlock();
+            if(success && idx>=0) ESP_LOGI(TAG, "Single DL success idx %d", idx);
+            else ESP_LOGW(TAG, "External DL failed for idx %d", idx);
+            return;
+        }
+    }
+
+    tt_lvgl_lock(portMAX_DELAY);
+    if (G.lbl_status) {
+        if (success) lv_label_set_text(G.lbl_status, "DL done – tap to play");
+        else lv_label_set_text(G.lbl_status, "DL failed – tap to retry");
+    }
+    tt_lvgl_unlock();
+
+    if(success && idx>=0){
+        ESP_LOGI(TAG, "Single DL success idx %d", idx);
+    } else {
+        ESP_LOGW(TAG, "External DL failed for idx %d", idx);
+    }
+}
+
+static void onHide(AppHandle app, void* data){
+    (void)app; (void)data;
+    save_current_ep_pos();
+    G.fetch_cancel_req=true;
+    G.dl_cancel_req=true;
+    G.dl_missing_active=false;
+
+    if(G.fetch_handle){
+        ESP_LOGI(TAG,"onHide: waiting fetch to exit");
+        tt_lvgl_lock(portMAX_DELAY);
+        for(int i=0;i<20 && G.fetch_handle!=NULL; i++){
+            tt_lvgl_unlock();
+            vTaskDelay(pdMS_TO_TICKS(100));
+            tt_lvgl_lock(portMAX_DELAY);
+        }
+        if(G.fetch_handle){
+            ESP_LOGW(TAG,"onHide: force deleting fetch task (leak risk)");
+            vTaskDelete(G.fetch_handle);
+            G.fetch_handle=NULL;
+        }
+        G.fetching=false;
+        tt_lvgl_unlock();
+    }
+
+    if(G.dl_handle){
+        ESP_LOGI(TAG,"onHide: waiting dl to exit");
+        tt_lvgl_lock(portMAX_DELAY);
+        for(int i=0;i<30 && G.dl_handle!=NULL; i++){
+            tt_lvgl_unlock();
+            vTaskDelay(pdMS_TO_TICKS(100));
+            tt_lvgl_lock(portMAX_DELAY);
+        }
+        if(G.dl_handle){
+            ESP_LOGW(TAG,"onHide: force deleting dl task after timeout");
+            vTaskDelete(G.dl_handle);
+            G.dl_handle=NULL;
+            G.downloading=false;
+            if(G.dl_overlay) hide_dl_overlay();
+        }
+        tt_lvgl_unlock();
+    }
+
+    tt_lvgl_lock(portMAX_DELAY);
+    wait_play_exit();
+    ui_deinit();
+    close_overlay();
+    if(G.dl_overlay) hide_dl_overlay();
+    if(G.root){
+        lv_obj_delete(G.root);
+        G.root = NULL;
+        G.lbl_title = NULL;
+        G.lbl_meta = NULL;
+        G.lbl_season = NULL;
+        G.ep_list_cont = NULL;
+        G.lbl_time = NULL;
+        G.lbl_status = NULL;
+        G.btn_play = NULL;
+        G.btn_seasons = NULL;
+        G.btn_dl_missing = NULL;
+        G.btn_refresh = NULL;
+        G.season_list_cont = NULL;
+        G.bar = NULL;
+    }
+    tt_lvgl_unlock();
+    save_state();
+}
+
+int main(int argc, char* argv[]){
+    (void)argc; (void)argv;
+    tt_app_register((AppRegistration){ .onShow=onShow, .onHide=onHide, .onResult=onResult });
+    return 0;
+}
@@ -0,0 +1,330 @@
+#include "network.h"
+#include "storage.h"
+#include "cJSON.h"
+#include <string.h>
+#include <stdlib.h>
+#include <stdio.h>
+#include <lwip/sockets.h>
+#include <lwip/inet.h>
+#include "freertos/FreeRTOS.h"
+#include "freertos/task.h"
+#include "esp_log.h"
+#include "esp_heap_caps.h"
+#include <unistd.h>
+
+uint16_t my_htons(uint16_t v){
+    // Proper byte swap with masking to avoid overflow
+    return (uint16_t)(((v & 0x00FF) << 8) | ((v & 0xFF00) >> 8));
+}
+
+bool resolve_host(const char* host, uint32_t* out_ip){
+    if(!host || !out_ip) return false;
+    uint32_t ip = ipaddr_addr(host);
+    if(ip!=0 && ip!=0xFFFFFFFF){
+        *out_ip=ip;
+        return true;
+    }
+    ESP_LOGE(TAG,"resolve fail (DNS not supported) %s",host);
+    return false;
+}
+
+void normalize_audio_url(const char* in, char* out, size_t out_len){
+    if(!in || !out) return;
+    if(strncmp(in,"http://",7)==0){
+        strncpy(out,in,out_len-1);
+        out[out_len-1]=0;
+        return;
+    }
+    if(in[0]=='/'){
+        snprintf(out,out_len,"%s%s",PB,in);
+        return;
+    }
+    if(strstr(in,"://")==NULL){
+        if(in[0]=='/') snprintf(out,out_len,"%s%s",PB,in);
+        else snprintf(out,out_len,"%s/%s",PB,in);
+        return;
+    }
+    strncpy(out,in,out_len-1);
+    out[out_len-1]=0;
+}
+
+int http_get_raw(const char* url, char** out_body){
+    if(!url || strncmp(url,"http://",7)!=0){ ESP_LOGE(TAG,"http_get url not http %s",url); return -1; }
+    const char* p = url+7;
+    const char* slash = strchr(p,'/');
+    if(!slash){ ESP_LOGE(TAG,"no slash %s",url); return -1; }
+    char hostport[128]={0};
+    size_t hlen=slash-p;
+    if(hlen>=sizeof(hostport)) return -1;
+    memcpy(hostport,p,hlen);
+    hostport[hlen]=0;
+    const char* path=slash;
+    char host[96]={0};
+    int port=80;
+    char* colon=strchr(hostport,':');
+    if(colon){ *colon=0; strncpy(host,hostport,sizeof(host)-1); port=atoi(colon+1); if(port<=0) port=80; } else { strncpy(host,hostport,sizeof(host)-1); }
+    ESP_LOGI(TAG,"GET %s host=%s port=%d",url,host,port);
+    uint32_t ip=0;
+    ESP_LOGI(TAG,"Resolving host %s",host);
+    if(!resolve_host(host,&ip)){ ESP_LOGE(TAG,"ip fail %s",host); return -1; }
+    ESP_LOGI(TAG,"Resolved %s -> ip 0x%08x", host, ip);
+    int fd=lwip_socket(AF_INET,SOCK_STREAM,0);
+    ESP_LOGI(TAG,"Socket fd=%d", fd);
+    if(fd<0){ ESP_LOGE(TAG,"socket fail"); return -1; }
+    struct sockaddr_in sa; 
+    ESP_LOGI(TAG,"Memset sa");
+    memset(&sa,0,sizeof(sa));
+    ESP_LOGI(TAG,"Set sa len/family/port/addr");
+    sa.sin_len = sizeof(sa);
+    sa.sin_family=AF_INET; 
+    sa.sin_port=my_htons(port); 
+    sa.sin_addr.s_addr=ip;
+    ESP_LOGI(TAG,"SetSockOpt RCV");
+    struct timeval tv={5,0};
+    int opt_res = lwip_setsockopt(fd,SOL_SOCKET,SO_RCVTIMEO,&tv,sizeof(tv));
+    ESP_LOGI(TAG,"SetSockOpt RCV res=%d", opt_res);
+    ESP_LOGI(TAG,"SetSockOpt SND");
+    opt_res = lwip_setsockopt(fd,SOL_SOCKET,SO_SNDTIMEO,&tv,sizeof(tv));
+    ESP_LOGI(TAG,"SetSockOpt SND res=%d", opt_res);
+    ESP_LOGI(TAG,"Connecting to %s:%d",host,port);
+    int conn_res = lwip_connect(fd,(struct sockaddr*)&sa,sizeof(sa));
+    ESP_LOGI(TAG,"Connect res=%d", conn_res);
+    if(conn_res<0){ ESP_LOGE(TAG,"connect fail %s:%d",host,port); close(fd); return -1; }
+    ESP_LOGI(TAG,"Connected, sending request");
+    char req[512];
+    int reqlen=snprintf(req,sizeof(req),"GET %s HTTP/1.0\r\nHost: %s:%d\r\nConnection: close\r\nUser-Agent: TactilityDM/0.1\r\nAccept: */*\r\n\r\n",path,host,port);
+    if(lwip_send(fd,req,reqlen,0)<0){ ESP_LOGE(TAG,"send fail"); close(fd); return -1; }
+    ESP_LOGI(TAG,"Request sent, waiting for response");
+
+    int capacity=8192; // further reduced to 8K internal to avoid PSRAM StoreProhibited crash (seen 0x8208775e)
+    char* buf=malloc(capacity);
+    if(!buf){
+        buf=heap_caps_malloc(capacity, MALLOC_CAP_SPIRAM | MALLOC_CAP_8BIT);
+        if(!buf){ ESP_LOGE(TAG,"buf 8k fail"); close(fd); return -1; }
+    }
+    int total=0;
+    char* header_end=NULL;
+    int body_start=0;
+    int content_len=-1;
+    bool is_chunked=false;
+
+    while(1){
+        // Graceful cancel support to avoid force vTaskDelete leaking PSRAM/SD resources
+        if(G.fetch_cancel_req){
+            ESP_LOGI(TAG,"http_get_raw canceled by user");
+            heap_caps_free(buf);
+            close(fd);
+            return -1;
+        }
+        if(total>=capacity-1){
+            int newcap=capacity*2;
+            if(newcap>600000){ ESP_LOGE(TAG,"too large %d",newcap); heap_caps_free(buf); close(fd); return -1; }
+            char* nb=heap_caps_malloc(newcap, MALLOC_CAP_SPIRAM | MALLOC_CAP_8BIT);
+            if(!nb){ heap_caps_free(buf); close(fd); return -1; }
+            memcpy(nb,buf,total);
+            heap_caps_free(buf);
+            buf=nb;
+            capacity=newcap;
+        }
+        int r=lwip_recv(fd,buf+total,capacity-total-1,0);
+        if(r<=0){
+            if(r<0 && (errno==EAGAIN || errno==EWOULDBLOCK || errno==ETIMEDOUT)){
+                ESP_LOGW(TAG,"http_get_raw timeout total=%d",total);
+                // On timeout, if fetching canceled, abort
+                if(G.fetch_cancel_req){
+                    ESP_LOGI(TAG,"http_get_raw timeout + canceled");
+                    heap_caps_free(buf);
+                    close(fd);
+                    return -1;
+                }
+                // Continue loop – LWIP will retry until EOF
+                // But if we already have header and content_len satisfied, break
+                if(header_end && content_len>=0 && !is_chunked && total-body_start >= content_len) break;
+                // If no header yet and timeout, treat as failure to avoid 15s hang
+                if(!header_end && total==0){
+                    ESP_LOGE(TAG,"http_get_raw timeout before header");
+                    heap_caps_free(buf);
+                    close(fd);
+                    return -1;
+                }
+                // Otherwise continue to try again
+                continue;
+            }
+            break;
+        }
+        total+=r;
+        buf[total]=0;
+        if(!header_end){
+            header_end=strstr(buf,"\r\n\r\n");
+            if(header_end){
+                body_start=(header_end-buf)+4;
+                if(strstr(buf,"chunked")) is_chunked=true;
+                char* cl=strstr(buf,"Content-Length:");
+                if(!cl) cl=strstr(buf,"content-length:");
+                if(cl){ cl=strchr(cl,':'); if(cl){ cl++; while(*cl==' ') cl++; content_len=atoi(cl); } }
+                ESP_LOGI(TAG,"header_end chunked=%d cl=%d total=%d",is_chunked,content_len,total);
+                if(content_len>=0 && !is_chunked){
+                    if(total-body_start >= content_len) break;
+                }
+            }
+        } else {
+            if(content_len>=0 && !is_chunked){
+                if(total-body_start >= content_len) break;
+            }
+        }
+    }
+    close(fd);
+    if(!header_end){ ESP_LOGE(TAG,"no header end total=%d",total); heap_caps_free(buf); return -1; }
+    if(strncmp(buf,"HTTP/1.1 200",12)!=0 && strncmp(buf,"HTTP/1.0 200",12)!=0){ ESP_LOGE(TAG,"not 200: %.60s",buf); heap_caps_free(buf); return -1; }
+
+    int raw_len=total-body_start;
+    char* raw=buf+body_start;
+    char* final_body=NULL;
+    int final_len=0;
+
+    if(is_chunked){
+        final_body=heap_caps_malloc(200000, MALLOC_CAP_SPIRAM | MALLOC_CAP_8BIT);
+        if(!final_body){ heap_caps_free(buf); return -1; }
+        int pos=0, out=0;
+        while(pos<raw_len){
+            char* crlf=strstr(raw+pos,"\r\n");
+            if(!crlf) break;
+            int off=crlf-(raw+pos);
+            if(off<=0 || off>16){ pos+=off+2; continue; }
+            char hex[16]={0};
+            memcpy(hex,raw+pos,off);
+            char* semi=strchr(hex,';');
+            if(semi) *semi=0;
+            long sz=strtol(hex,NULL,16);
+            if(sz==0) break;
+            pos+=off+2;
+            if(pos+sz>raw_len) sz=raw_len-pos;
+            if(out+sz>=200000) break;
+            memcpy(final_body+out,raw+pos,sz);
+            out+=sz;
+            pos+=sz;
+            if(pos+1<raw_len && raw[pos]=='\r' && raw[pos+1]=='\n') pos+=2;
+        }
+        final_body[out]=0;
+        final_len=out;
+    } else {
+        int bl=raw_len;
+        if(content_len>=0 && bl>content_len) bl=content_len;
+        final_body=heap_caps_malloc(bl+1, MALLOC_CAP_SPIRAM | MALLOC_CAP_8BIT);
+        if(!final_body){ heap_caps_free(buf); return -1; }
+        memcpy(final_body,raw,bl);
+        final_body[bl]=0;
+        final_len=bl;
+    }
+    heap_caps_free(buf);
+    *out_body=final_body;
+    ESP_LOGI(TAG,"GET ok %d",final_len);
+    return final_len;
+}
+
+bool fetch_data(){
+    char* js=NULL;
+    char url[320];
+    bool seasons_ok=false;
+    bool episodes_ok=false;
+    ESP_LOGI(TAG,"fetch seasons");
+    // Reduce payload via fields filter – drastically lowers cJSON malloc pressure (internal heap low warning)
+    snprintf(url,sizeof(url),"%s/api/collections/dm_seasons/records?perPage=100&sort=season_num&fields=season_num",PB);
+    int len=http_get_raw(url,&js);
+    if(len>0 && js){
+        cJSON* root=cJSON_Parse(js);
+        free(js); js=NULL;
+        if(root){
+            cJSON* items=cJSON_GetObjectItem(root,"items");
+            if(cJSON_IsArray(items)){
+                G.season_cnt=0;
+                int n=cJSON_GetArraySize(items);
+                for(int i=0;i<n&&G.season_cnt<MAX_SEASONS;i++){
+                    cJSON* it=cJSON_GetArrayItem(items,i);
+                    cJSON* sn=cJSON_GetObjectItem(it,"season_num");
+                    if(sn&&cJSON_IsNumber(sn)){ G.seasons[G.season_cnt].num=sn->valueint; G.season_cnt++; }
+                }
+                sort_seasons();
+                if(G.season_cnt>0) seasons_ok=true;
+            }
+            cJSON_Delete(root);
+        }
+    } else {
+        ESP_LOGW(TAG,"seasons fetch failed");
+    }
+    if(G.season_cnt==0){
+        ESP_LOGW(TAG,"seasons fallback");
+        for(int i=1;i<=37;i++) G.seasons[i-1].num=i;
+        G.season_cnt=37;
+    }
+
+    ESP_LOGI(TAG,"fetch episodes paginated to reduce internal heap (prev low 7KB)");
+    G.ep_cnt=0;
+    for(int page=1; page<=10; page++){
+        if(G.fetch_cancel_req) break;
+        if(G.ep_cnt>=MAX_EPS) break;
+        snprintf(url,sizeof(url),"%s/api/collections/dm_episodes/records?perPage=25&page=%d&sort=season_num,episode_num&fields=title,slug,season_num,episode_num,audio_url",PB,page);
+        len=http_get_raw(url,&js);
+        if(len<=0 || !js){
+            ESP_LOGW(TAG,"episodes page %d fetch failed",page);
+            if(js){ free(js); js=NULL; }
+            break;
+        }
+        cJSON* root=cJSON_Parse(js);
+        free(js); js=NULL;
+        if(!root){
+            ESP_LOGW(TAG,"episodes page %d JSON parse fail",page);
+            break;
+        }
+        cJSON* items=cJSON_GetObjectItem(root,"items");
+        if(!cJSON_IsArray(items)){
+            cJSON_Delete(root);
+            break;
+        }
+        int n=cJSON_GetArraySize(items);
+        if(n==0){
+            cJSON_Delete(root);
+            break;
+        }
+        ESP_LOGI(TAG,"episodes page %d got %d items (total so far %d)",page,n,G.ep_cnt);
+        for(int i=0;i<n&&G.ep_cnt<MAX_EPS;i++){
+            cJSON* it=cJSON_GetArrayItem(items,i);
+            cJSON* t=cJSON_GetObjectItem(it,"title");
+            cJSON* slug=cJSON_GetObjectItem(it,"slug");
+            cJSON* sn=cJSON_GetObjectItem(it,"season_num");
+            cJSON* en=cJSON_GetObjectItem(it,"episode_num");
+            cJSON* au=cJSON_GetObjectItem(it,"audio_url");
+            if(!sn||!en) continue;
+            EpInfo* e=&G.eps[G.ep_cnt];
+            memset(e,0,sizeof(*e));
+            if(t&&cJSON_IsString(t)) strncpy(e->title,t->valuestring,sizeof(e->title)-1);
+            if(slug&&cJSON_IsString(slug)) strncpy(e->slug,slug->valuestring,sizeof(e->slug)-1);
+            else if(t) strncpy(e->slug,t->valuestring,sizeof(e->slug)-1);
+            e->season=sn->valueint;
+            e->ep_num=en->valueint;
+            if(au&&cJSON_IsString(au)) strncpy(e->audio_url,au->valuestring,sizeof(e->audio_url)-1);
+            e->seen=has_slug(e->slug);
+            G.ep_cnt++;
+        }
+        episodes_ok=true;
+        cJSON_Delete(root);
+        // Yield between pages to let MemoryChecker recover
+        vTaskDelay(pdMS_TO_TICKS(400));
+        if(n<25) break; // last page
+    }
+    // Final sort after all pages
+    if(G.ep_cnt>0) sort_eps();
+
+    if(G.ep_cnt==0){
+        ESP_LOGW(TAG,"episodes fallback");
+        for(int i=0;i<6;i++){
+            EpInfo* e=&G.eps[i];
+            snprintf(e->slug,sizeof(e->slug),"S01E%02d",i+1);
+            snprintf(e->title,sizeof(e->title),"Episode %d",i+1);
+            e->season=1; e->ep_num=i+1;
+        }
+        G.ep_cnt=6;
+    }
+    for(int i=0;i<G.ep_cnt;i++) G.eps[i].seen=has_slug(G.eps[i].slug);
+    return (seasons_ok && episodes_ok);
+}
@@ -0,0 +1,23 @@
+#pragma once
+
+#include "app_context.h"
+#include <stdbool.h>
+#include <stdint.h>
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+uint16_t my_htons(uint16_t v);
+bool resolve_host(const char* host, uint32_t* out_ip);
+void normalize_audio_url(const char* in, char* out, size_t out_len);
+
+// Robust HTTP GET with PSRAM buffer, returns length and allocates *out_body (must be free'd via free/heap_caps_free)
+int http_get_raw(const char* url, char** out_body);
+
+// Fetch seasons and episodes from PB – returns true if network fetch succeeded with real data
+bool fetch_data(void);
+
+#ifdef __cplusplus
+}
+#endif
@@ -0,0 +1,305 @@
+#include "player.h"
+#include "storage.h"
+#include "ui.h"
+#include "download.h"
+
+#include <tt_lvgl.h>
+#include <tt_app.h>
+#include <tt_bundle.h>
+#include <string.h>
+#include <stdlib.h>
+#include <stdio.h>
+#include "freertos/FreeRTOS.h"
+#include "freertos/task.h"
+#include "esp_log.h"
+#include "esp_heap_caps.h"
+
+void wait_play_exit(void) {
+    // No internal playback anymore, nothing to wait
+}
+
+void stop_playback_sync(void) {
+    // No internal playback, nothing to stop
+    G.is_playing = false;
+    G.is_paused = false;
+}
+
+static bool try_external_downloader(int idx) {
+    if(idx<0||idx>=G.ep_cnt) return false;
+    EpInfo* ep=&G.eps[idx];
+    if (strlen(ep->audio_url) < 8) {
+        ESP_LOGW(TAG, "Skipping DL for %s: empty URL", ep->slug);
+        tt_lvgl_lock(portMAX_DELAY);
+        if (G.lbl_status) lv_label_set_text(G.lbl_status, "No URL – fetch failed?");
+        tt_lvgl_unlock();
+        return false;
+    }
+    char fpath[300];
+    make_sd_path(fpath, sizeof(fpath), ep->slug);
+
+    // Preserve browsing season so we return to same season after downloader closes – survive G memset via static
+    dm_preserve_season(ep->season);
+    int saved_season = G.cur_season;
+    G.cur_season = ep->season;
+    save_state();
+    G.cur_ep_idx = idx;
+    (void)saved_season;
+
+    tt_lvgl_lock(portMAX_DELAY);
+    close_overlay();
+    if(G.dl_overlay) hide_dl_overlay();
+    tt_lvgl_unlock();
+
+    BundleHandle b = tt_bundle_alloc();
+    if (!b) {
+        ESP_LOGW(TAG, "Failed to alloc bundle for external DL");
+        return false;
+    }
+    tt_bundle_put_string(b, "url", ep->audio_url);
+    tt_bundle_put_string(b, "path", fpath);
+    tt_bundle_put_bool(b, "override", false);
+
+    ESP_LOGI(TAG, "Starting external SdDownloader for %s -> %s season %d", ep->slug, fpath, G.cur_season);
+    G.pending_dl_idx = idx;
+
+    tt_lvgl_lock(portMAX_DELAY);
+    if (G.lbl_status) lv_label_set_text(G.lbl_status, "Starting downloader...");
+    tt_lvgl_unlock();
+
+    tt_app_start_with_bundle("one.tactility.sddownloader", b);
+    return true;
+}
+
+int count_missing_in_season(int season){
+    int cnt=0;
+    for(int i=0;i<G.ep_cnt;i++){
+        if(G.eps[i].season==season && !G.eps[i].seen && strlen(G.eps[i].audio_url)>=8) cnt++;
+    }
+    return cnt;
+}
+int find_next_missing_in_season(int season){
+    for(int i=0;i<G.ep_cnt;i++){
+        if(G.eps[i].season==season && !G.eps[i].seen && strlen(G.eps[i].audio_url)>=8) return i;
+    }
+    return -1;
+}
+bool download_episode(int idx){
+    return try_external_downloader(idx);
+}
+bool download_missing_next(void){
+    if(!G.dl_missing_active) return false;
+    int next = find_next_missing_in_season(G.dl_missing_season);
+    if(next==-1){
+        // No more missing – done
+        G.dl_missing_active=false;
+        tt_lvgl_lock(portMAX_DELAY);
+        if(G.lbl_status){
+            char msg[64];
+            snprintf(msg,sizeof(msg),"DL S%02d done %d ok %d fail", G.dl_missing_season, G.dl_missing_done, G.dl_missing_failed);
+            lv_label_set_text(G.lbl_status, msg);
+        }
+        tt_lvgl_unlock();
+        return false;
+    }
+    // Update UI for next file
+    tt_lvgl_lock(portMAX_DELAY);
+    if(G.lbl_status){
+        char msg[64];
+        snprintf(msg,sizeof(msg),"DL %d/%d S%02d...", G.dl_missing_done+1, G.dl_missing_total, G.dl_missing_season);
+        lv_label_set_text(G.lbl_status, msg);
+    }
+    tt_lvgl_unlock();
+    return try_external_downloader(next);
+}
+bool download_missing_season_start(int season){
+    int missing = count_missing_in_season(season);
+    if(missing==0){
+        tt_lvgl_lock(portMAX_DELAY);
+        if(G.lbl_status) lv_label_set_text(G.lbl_status,"Season already cached");
+        tt_lvgl_unlock();
+        G.dl_missing_active=false;
+        return true;
+    }
+    ESP_LOGI(TAG, "Starting sequential DL for S%02d, %d missing", season, missing);
+    G.dl_missing_active=true;
+    G.dl_missing_season=season;
+    G.dl_missing_total=missing;
+    G.dl_missing_done=0;
+    G.dl_missing_failed=0;
+    // Preserve season in persisted state and static before leaving
+    dm_preserve_season(season);
+    G.cur_season = season;
+    save_state();
+    int first = find_next_missing_in_season(season);
+    if(first==-1){
+        G.dl_missing_active=false;
+        return true;
+    }
+    // Update status
+    tt_lvgl_lock(portMAX_DELAY);
+    if(G.lbl_status){
+        char msg[64];
+        snprintf(msg,sizeof(msg),"DL 1/%d S%02d...", missing, season);
+        lv_label_set_text(G.lbl_status, msg);
+    }
+    tt_lvgl_unlock();
+    return try_external_downloader(first);
+}
+
+static bool try_external_downloader_batch(int season) {
+    // Sequential queue – safe single-file mode
+    return download_missing_season_start(season);
+}
+
+void start_idx_internal(int idx){
+    if(idx<0||idx>=G.ep_cnt) return;
+    EpInfo* ep=&G.eps[idx];
+    char fpath[300];
+    make_sd_path(fpath, sizeof(fpath), ep->slug);
+
+    if(!has_slug(ep->slug)){
+        ESP_LOGW(TAG, "start_idx_internal called but file missing %s", ep->slug);
+        start_idx(idx);
+        return;
+    }
+
+    int saved = 0;
+    if(G.cur_ep_idx!=idx){
+        saved = get_saved_pos_for_slug(ep->slug);
+        if(saved>5){
+            ESP_LOGI(TAG,"Restoring saved pos %d for %s", saved, ep->slug);
+        }
+    } else {
+        saved = G.pos_sec;
+    }
+
+    tt_lvgl_lock(portMAX_DELAY);
+    close_overlay();
+    if(G.dl_overlay) hide_dl_overlay();
+    tt_lvgl_unlock();
+
+    BundleHandle b = tt_bundle_alloc();
+    if(b){
+        tt_bundle_put_string(b, "file", fpath);
+        tt_bundle_put_string(b, "path", fpath);
+        tt_bundle_put_int32(b, "pos_sec", saved);
+        tt_bundle_put_int32(b, "position", saved);
+        tt_bundle_put_int32(b, "volume", G.volume);
+        ESP_LOGI(TAG, "Launching Mp3Player for %s pos %d season %d", fpath, saved, ep->season);
+        G.pending_dl_idx = idx;
+        G.cur_ep_idx=idx; G.cur_season=ep->season;
+        strncpy(G.cur_title,ep->title,sizeof(G.cur_title)-1);
+        strncpy(G.last_slug,ep->slug,sizeof(G.last_slug)-1);
+        dm_preserve_season(ep->season);
+        save_state();
+        tt_app_start_with_bundle("one.tactility.mp3player", b);
+        return;
+    }
+
+    ESP_LOGW(TAG, "Failed to alloc bundle for Mp3Player");
+    tt_lvgl_lock(portMAX_DELAY);
+    if(G.lbl_status) lv_label_set_text(G.lbl_status,"Failed to launch player");
+    tt_lvgl_unlock();
+}
+
+void start_idx(int idx){
+    if(idx<0||idx>=G.ep_cnt) return;
+    EpInfo* ep=&G.eps[idx];
+    if(!has_slug(ep->slug)){
+        // File not on SD, download via external downloader
+        if (try_external_downloader(idx)) {
+            return;
+        }
+        // Fallback: show message, cannot download internally anymore
+        tt_lvgl_lock(portMAX_DELAY);
+        if(G.lbl_status) lv_label_set_text(G.lbl_status,"Install SdDownloader");
+        tt_lvgl_unlock();
+        return;
+    }
+    start_idx_internal(idx);
+}
+
+void select_ep(int idx){
+    if(idx<0||idx>=G.ep_cnt) return;
+    if(G.cur_ep_idx>=0 && G.cur_ep_idx < G.ep_cnt && G.cur_ep_idx!=idx){
+        save_current_ep_pos();
+    }
+    G.cur_ep_idx=idx;
+    EpInfo* ep=&G.eps[idx];
+    G.cur_season=ep->season;
+    strncpy(G.last_slug, ep->slug, sizeof(G.last_slug)-1);
+
+    int saved = get_saved_pos_for_slug(ep->slug);
+    G.pos_sec=saved;
+    G.last_pct=-1;
+    G.total_sec=0;
+
+    tt_lvgl_lock(portMAX_DELAY);
+    if(G.lbl_title) lv_label_set_text(G.lbl_title,ep->title);
+    if(G.lbl_meta){
+        char b[64];
+        if(saved>5){
+            char tbuf[16];
+            fmt_time(tbuf,saved);
+            snprintf(b,sizeof(b),"S%02d E%02d %s • %s",ep->season,ep->ep_num,ep->seen?"*":"",tbuf);
+        } else {
+            snprintf(b,sizeof(b),"S%02d E%02d %s",ep->season,ep->ep_num,ep->seen?"*":"");
+        }
+        lv_label_set_text(G.lbl_meta,b);
+    }
+    if(G.lbl_status){
+        if(saved>5) lv_label_set_text(G.lbl_status,"Resume – tap Play");
+        else lv_label_set_text(G.lbl_status,ep->seen?"On SD – tap Play":"Tap Play to download");
+    }
+    if(G.bar){
+        lv_bar_set_value(G.bar,0,LV_ANIM_OFF);
+    }
+    if(G.lbl_time){
+        if(saved>5){
+            char a[16];
+            fmt_time(a,saved);
+            char buf[40];
+            snprintf(buf,sizeof(buf),"%s / --:--",a);
+            lv_label_set_text(G.lbl_time,buf);
+        } else {
+            lv_label_set_text(G.lbl_time,"0:00 / --:--");
+        }
+    }
+    tt_lvgl_unlock();
+    save_state();
+}
+
+void go_next(){
+    if(G.ep_cnt==0) return;
+    save_current_ep_pos();
+    save_state();
+    int n=G.cur_ep_idx+1;
+    if(n>=G.ep_cnt) n=0;
+    select_ep(n);
+    // Do not auto-play next, per user request: no autoplay
+}
+
+void go_prev(){
+    if(G.ep_cnt==0) return;
+    if(G.pos_sec>5){
+        if(G.cur_ep_idx>=0){
+            set_saved_pos_for_slug(G.eps[G.cur_ep_idx].slug, 0);
+            save_state();
+        }
+        G.pos_sec=0;
+        int cur=G.cur_ep_idx;
+        if(cur<0) cur=0;
+        select_ep(cur);
+        return;
+    }
+    save_current_ep_pos();
+    save_state();
+    int p=G.cur_ep_idx-1;
+    if(p<0) p=G.ep_cnt-1;
+    select_ep(p);
+}
+
+// Called from UI for season batch download
+bool download_season(int season) {
+    return try_external_downloader_batch(season);
+}
@@ -0,0 +1,30 @@
+#pragma once
+
+#include "app_context.h"
+#include <stdbool.h>
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+// Simplified: no internal audio, only external apps
+void wait_play_exit(void);
+void stop_playback_sync(void);
+
+void start_idx_internal(int idx);
+void start_idx(int idx);
+void select_ep(int idx);
+void go_next(void);
+void go_prev(void);
+bool download_season(int season);
+
+// New single-file download API
+bool download_episode(int idx);
+bool download_missing_season_start(int season);
+bool download_missing_next(void); // continue queue, returns false if done
+int count_missing_in_season(int season);
+int find_next_missing_in_season(int season);
+
+#ifdef __cplusplus
+}
+#endif
@@ -0,0 +1,322 @@
+#include "storage.h"
+#include "cJSON.h"
+#include <string.h>
+#include <stdlib.h>
+#include <stdio.h>
+#include <dirent.h>
+#include <sys/stat.h>
+#include <unistd.h>
+#include "esp_heap_caps.h"
+
+void make_sd_path(char* out, size_t out_len, const char* slug){
+    if(!out || !slug) return;
+    snprintf(out, out_len, "%s/%s.mp3", DM_DIR, slug);
+}
+void ensure_dir(){
+    mkdir("/sdcard/apps",0777);
+    mkdir("/sdcard/apps/one.tactility.discoverymountain",0777);
+    mkdir("/sdcard/apps/one.tactility.discoverymountain/userdata",0777);
+    mkdir(DM_DIR,0777);
+}
+bool has_slug(const char* slug){
+    char p[300];
+    make_sd_path(p, sizeof(p), slug);
+    struct stat st;
+    return stat(p,&st)==0;
+}
+
+void fmt_time(char* o,int s){ snprintf(o,16,"%d:%02d",s/60,s%60); }
+
+void sort_seasons(){
+    for(int i=0;i<G.season_cnt;i++){
+        for(int j=i+1;j<G.season_cnt;j++){
+            if(G.seasons[j].num < G.seasons[i].num){
+                SeasonInfo t=G.seasons[i]; G.seasons[i]=G.seasons[j]; G.seasons[j]=t;
+            }
+        }
+    }
+}
+void sort_eps(){
+    // Use PSRAM for temp to avoid stack overflow (EpInfo ~300 bytes, was on stack)
+    EpInfo *t = heap_caps_malloc(sizeof(EpInfo), MALLOC_CAP_SPIRAM | MALLOC_CAP_8BIT);
+    if(!t) return;
+    for(int i=0;i<G.ep_cnt;i++){
+        for(int j=i+1;j<G.ep_cnt;j++){
+            EpInfo *a=&G.eps[i], *b=&G.eps[j];
+            bool should_swap=false;
+            if(a->season != b->season) should_swap = (b->season < a->season);
+            else should_swap = (b->ep_num < a->ep_num);
+            if(should_swap){
+                *t=*a; *a=*b; *b=*t;
+            }
+        }
+    }
+    heap_caps_free(t);
+}
+
+// ── Per-episode position helpers ──
+int find_saved_pos_idx(const char* slug){
+    if(!slug) return -1;
+    for(int i=0;i<G.saved_pos_cnt;i++){
+        if(strcmp(G.saved_pos[i].slug, slug)==0) return i;
+    }
+    return -1;
+}
+int get_saved_pos_for_slug(const char* slug){
+    int idx=find_saved_pos_idx(slug);
+    if(idx>=0) return G.saved_pos[idx].pos;
+    return 0;
+}
+void set_saved_pos_for_slug(const char* slug, int pos){
+    if(!slug || strlen(slug)==0) return;
+    if(pos<0) pos=0;
+    if(G.total_sec>0 && pos>0 && pos >= G.total_sec-10){
+        pos=0;
+    }
+    int idx=find_saved_pos_idx(slug);
+    if(idx>=0){
+        G.saved_pos[idx].pos=pos;
+        return;
+    }
+    if(G.saved_pos_cnt < MAX_EPS){
+        strncpy(G.saved_pos[G.saved_pos_cnt].slug, slug, sizeof(G.saved_pos[G.saved_pos_cnt].slug)-1);
+        G.saved_pos[G.saved_pos_cnt].slug[sizeof(G.saved_pos[G.saved_pos_cnt].slug)-1]=0;
+        G.saved_pos[G.saved_pos_cnt].pos=pos;
+        G.saved_pos_cnt++;
+    }
+}
+void save_current_ep_pos(){
+    if(G.cur_ep_idx>=0 && G.cur_ep_idx < G.ep_cnt){
+        const char* slug=G.eps[G.cur_ep_idx].slug;
+        set_saved_pos_for_slug(slug, G.pos_sec);
+    } else if(strlen(G.last_slug)>0){
+        set_saved_pos_for_slug(G.last_slug, G.pos_sec);
+    }
+}
+
+void save_state(){
+    if(G.cur_ep_idx>=0 && G.ep_cnt>0){
+        if(G.pos_sec>=0){
+            set_saved_pos_for_slug(G.eps[G.cur_ep_idx].slug, G.pos_sec);
+        }
+    }
+    cJSON* r=cJSON_CreateObject();
+    if(G.ep_cnt>0 && G.cur_ep_idx>=0 && G.cur_ep_idx < G.ep_cnt) cJSON_AddStringToObject(r,"last_slug",G.eps[G.cur_ep_idx].slug);
+    else if(strlen(G.last_slug)>0) cJSON_AddStringToObject(r,"last_slug",G.last_slug);
+    cJSON_AddNumberToObject(r,"last_season",G.cur_season);
+    cJSON_AddNumberToObject(r,"pos_sec",G.pos_sec);
+    if(G.saved_pos_cnt>0){
+        cJSON* pos_obj=cJSON_CreateObject();
+        for(int i=0;i<G.saved_pos_cnt;i++){
+            if(G.saved_pos[i].slug[0]==0) continue;
+            if(G.saved_pos[i].pos>0){
+                cJSON_AddNumberToObject(pos_obj, G.saved_pos[i].slug, G.saved_pos[i].pos);
+            }
+        }
+        cJSON_AddItemToObject(r,"positions",pos_obj);
+    }
+    char* s=cJSON_PrintUnformatted(r);
+    if(s){
+        FILE* f=fopen(STATE_PATH,"w");
+        if(f){ fwrite(s,1,strlen(s),f); fclose(f);}
+        free(s);
+    }
+    cJSON_Delete(r);
+}
+
+void load_state(){
+    G.cur_season=1; G.cur_ep_idx=-1; G.pos_sec=0;
+    G.saved_pos_cnt=0;
+    G.last_save_tick=0;
+    memset(G.last_slug,0,sizeof(G.last_slug));
+    memset(G.saved_pos,0,sizeof(G.saved_pos));
+    FILE* f=fopen(STATE_PATH,"r");
+    if(!f) return;
+    fseek(f,0,SEEK_END);
+    long sz=ftell(f);
+    fseek(f,0,SEEK_SET);
+    if(sz<=0||sz>16384){ fclose(f); return;}
+    char* buf=malloc(sz+1);
+    if(!buf){ fclose(f); return; }
+    size_t got=fread(buf,1,sz,f);
+    buf[got]=0;
+    fclose(f);
+    cJSON* r=cJSON_Parse(buf);
+    free(buf);
+    if(!r) return;
+    cJSON* ls=cJSON_GetObjectItem(r,"last_slug");
+    cJSON* lsn=cJSON_GetObjectItem(r,"last_season");
+    cJSON* ps=cJSON_GetObjectItem(r,"pos_sec");
+    if(ps&&cJSON_IsNumber(ps)) G.pos_sec=ps->valueint;
+    if(lsn&&cJSON_IsNumber(lsn)) G.cur_season=lsn->valueint;
+    if(ls&&cJSON_IsString(ls)){
+        strncpy(G.last_slug, ls->valuestring, sizeof(G.last_slug)-1);
+        // Do NOT overwrite cur_season here based on slug – browsing season is independent
+        // cur_ep_idx will be resolved after cache load in onShow
+    }
+    cJSON* poss=cJSON_GetObjectItem(r,"positions");
+    if(poss && cJSON_IsObject(poss)){
+        cJSON* child=NULL;
+        cJSON_ArrayForEach(child, poss){
+            if(cJSON_IsNumber(child) && child->string && G.saved_pos_cnt < MAX_EPS){
+                strncpy(G.saved_pos[G.saved_pos_cnt].slug, child->string, sizeof(G.saved_pos[G.saved_pos_cnt].slug)-1);
+                G.saved_pos[G.saved_pos_cnt].pos=child->valueint;
+                G.saved_pos_cnt++;
+            }
+        }
+        if(strlen(G.last_slug)>0){
+            int sp=get_saved_pos_for_slug(G.last_slug);
+            if(sp>0) G.pos_sec=sp;
+        }
+    }
+    cJSON_Delete(r);
+}
+
+bool save_cache(void){
+    if(G.ep_cnt==0 || G.season_cnt==0) return false;
+    cJSON* root=cJSON_CreateObject();
+    if(!root) return false;
+    cJSON* seasons_arr=cJSON_CreateArray();
+    if(!seasons_arr){ cJSON_Delete(root); return false; }
+    for(int i=0;i<G.season_cnt && i<MAX_SEASONS;i++){
+        cJSON_AddItemToArray(seasons_arr, cJSON_CreateNumber(G.seasons[i].num));
+    }
+    cJSON_AddItemToObject(root,"seasons",seasons_arr);
+
+    cJSON* eps_arr=cJSON_CreateArray();
+    if(!eps_arr){ cJSON_Delete(root); return false; }
+    for(int i=0;i<G.ep_cnt && i<MAX_EPS;i++){
+        EpInfo* e=&G.eps[i];
+        if(e->slug[0]==0) continue;
+        cJSON* obj=cJSON_CreateObject();
+        if(!obj) continue;
+        cJSON_AddStringToObject(obj,"title", e->title);
+        cJSON_AddStringToObject(obj,"slug", e->slug);
+        cJSON_AddNumberToObject(obj,"season_num", e->season);
+        cJSON_AddNumberToObject(obj,"episode_num", e->ep_num);
+        cJSON_AddStringToObject(obj,"audio_url", e->audio_url);
+        cJSON_AddItemToArray(eps_arr, obj);
+    }
+    cJSON_AddItemToObject(root,"episodes",eps_arr);
+
+    char* s=cJSON_PrintUnformatted(root);
+    cJSON_Delete(root);
+    if(!s) return false;
+    FILE* f=fopen(CACHE_PATH,"w");
+    bool ok=false;
+    if(f){
+        size_t len=strlen(s);
+        size_t wrote=fwrite(s,1,len,f);
+        fclose(f);
+        ok = (wrote==len);
+    }
+    free(s);
+    return ok;
+}
+
+bool load_cache(void){
+    FILE* f=fopen(CACHE_PATH,"r");
+    if(!f) return false;
+    fseek(f,0,SEEK_END);
+    long sz=ftell(f);
+    fseek(f,0,SEEK_SET);
+    if(sz<=0 || sz>200000){ fclose(f); return false; }
+    // Use PSRAM for large json to avoid internal heap pressure
+    char* buf=heap_caps_malloc(sz+1, MALLOC_CAP_SPIRAM | MALLOC_CAP_8BIT);
+    if(!buf){
+        buf=malloc(sz+1);
+        if(!buf){ fclose(f); return false; }
+    }
+    size_t got=fread(buf,1,sz,f);
+    buf[got]=0;
+    fclose(f);
+    cJSON* root=cJSON_Parse(buf);
+    heap_caps_free(buf);
+    if(!root) return false;
+
+    cJSON* seasons_arr=cJSON_GetObjectItem(root,"seasons");
+    cJSON* eps_arr=cJSON_GetObjectItem(root,"episodes");
+    if(!cJSON_IsArray(seasons_arr) || !cJSON_IsArray(eps_arr)){
+        cJSON_Delete(root);
+        return false;
+    }
+
+    int scnt=cJSON_GetArraySize(seasons_arr);
+    G.season_cnt=0;
+    for(int i=0;i<scnt && G.season_cnt<MAX_SEASONS;i++){
+        cJSON* it=cJSON_GetArrayItem(seasons_arr,i);
+        if(cJSON_IsNumber(it)){
+            G.seasons[G.season_cnt].num=it->valueint;
+            G.season_cnt++;
+        }
+    }
+
+    int ecnt=cJSON_GetArraySize(eps_arr);
+    G.ep_cnt=0;
+    for(int i=0;i<ecnt && G.ep_cnt<MAX_EPS;i++){
+        cJSON* it=cJSON_GetArrayItem(eps_arr,i);
+        if(!cJSON_IsObject(it)) continue;
+        cJSON* t=cJSON_GetObjectItem(it,"title");
+        cJSON* slug=cJSON_GetObjectItem(it,"slug");
+        cJSON* sn=cJSON_GetObjectItem(it,"season_num");
+        cJSON* en=cJSON_GetObjectItem(it,"episode_num");
+        cJSON* au=cJSON_GetObjectItem(it,"audio_url");
+        if(!sn || !en) continue;
+        EpInfo* e=&G.eps[G.ep_cnt];
+        memset(e,0,sizeof(*e));
+        if(t && cJSON_IsString(t)) strncpy(e->title, t->valuestring, sizeof(e->title)-1);
+        if(slug && cJSON_IsString(slug)) strncpy(e->slug, slug->valuestring, sizeof(e->slug)-1);
+        else if(t && cJSON_IsString(t)) strncpy(e->slug, t->valuestring, sizeof(e->slug)-1);
+        e->season=sn->valueint;
+        e->ep_num=en->valueint;
+        if(au && cJSON_IsString(au)) strncpy(e->audio_url, au->valuestring, sizeof(e->audio_url)-1);
+        e->seen=has_slug(e->slug);
+        G.ep_cnt++;
+    }
+
+    cJSON_Delete(root);
+    if(G.season_cnt>0) sort_seasons();
+    if(G.ep_cnt>0) sort_eps();
+    // Refresh seen in case SD changed
+    for(int i=0;i<G.ep_cnt;i++) G.eps[i].seen=has_slug(G.eps[i].slug);
+    return (G.season_cnt>0 && G.ep_cnt>0);
+}
+
+void lru_check(){
+    typedef struct{ char path[300]; time_t mt; } FE;
+    // Allocate from PSRAM to avoid stack overflow (200*~304=60KB on stack would overflow 12KB task)
+    FE *files = heap_caps_malloc(200 * sizeof(FE), MALLOC_CAP_SPIRAM | MALLOC_CAP_8BIT);
+    if(!files) return;
+    int fc=0;
+    DIR* d=opendir(DM_DIR);
+    if(!d){ heap_caps_free(files); return; }
+    struct dirent* de;
+    char cur_path[300]={0};
+    if(G.cur_ep_idx>=0 && G.cur_ep_idx<G.ep_cnt){
+        make_sd_path(cur_path, sizeof(cur_path), G.eps[G.cur_ep_idx].slug);
+    }
+    while((de=readdir(d))!=NULL && fc<200){
+        if(de->d_name[0]=='.') continue;
+        size_t l=strlen(de->d_name);
+        if(l<5) continue;
+        if(strcmp(de->d_name+l-4,".mp3")!=0) continue;
+        char full[300];
+        snprintf(full,sizeof(full),"%s/%.200s",DM_DIR,de->d_name);
+        struct stat st;
+        if(stat(full,&st)!=0) continue;
+        if(cur_path[0] && strcmp(full,cur_path)==0) continue;
+        strncpy(files[fc].path,full,sizeof(files[fc].path)-1);
+        files[fc].mt=st.st_mtime;
+        fc++;
+    }
+    closedir(d);
+    if(fc<12){ heap_caps_free(files); return; }
+    for(int i=0;i<fc;i++){
+        for(int j=i+1;j<fc;j++){
+            if(files[j].mt<files[i].mt){ FE t=files[i]; files[i]=files[j]; files[j]=t; }
+        }
+    }
+    int todel=fc-8;
+    for(int i=0;i<todel;i++) unlink(files[i].path);
+    heap_caps_free(files);
+}
@@ -0,0 +1,42 @@
+#pragma once
+
+#include "app_context.h"
+#include <stddef.h>
+#include <stdbool.h>
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+// Path helpers
+void make_sd_path(char* out, size_t out_len, const char* slug);
+void ensure_dir(void);
+bool has_slug(const char* slug);
+
+// LRU cache cleanup
+void lru_check(void);
+
+// Sorting
+void sort_seasons(void);
+void sort_eps(void);
+
+// Time formatting
+void fmt_time(char* o, int s);
+
+// Per-episode resume helpers
+int find_saved_pos_idx(const char* slug);
+int get_saved_pos_for_slug(const char* slug);
+void set_saved_pos_for_slug(const char* slug, int pos);
+void save_current_ep_pos(void);
+
+// Persistence
+void save_state(void);
+void load_state(void);
+
+// Seasons / episodes cache (PB data, rarely changes)
+bool save_cache(void);
+bool load_cache(void);
+
+#ifdef __cplusplus
+}
+#endif
@@ -0,0 +1,587 @@
+#include "ui.h"
+#include "storage.h"
+#include "player.h"
+#include "download.h"
+
+#include <tt_lvgl.h>
+#include <tt_app.h>
+#include <tt_bundle.h>
+#include <tactility/lvgl_fonts.h>
+#include <string.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <stdint.h>
+#include "esp_log.h"
+#include "esp_heap_caps.h"
+
+void close_overlay(){
+    if(G.overlay){
+        lv_obj_delete(G.overlay);
+        G.overlay=NULL;
+        G.dropdown=NULL;
+        G.season_list_cont=NULL;
+    }
+}
+
+static void overlay_close_timer_cb(lv_timer_t* t){
+    close_overlay();
+    lv_timer_delete(t);
+}
+static void close_overlay_safe(void){
+    // Defer deletion to avoid deleting ancestor of current event target (season buttons inside overlay)
+    lv_timer_create(overlay_close_timer_cb, 20, NULL);
+}
+
+// Forward decls
+static void ep_action_cb(lv_event_t* e);
+static void season_select_cb(lv_event_t* e);
+static void rebuild_episode_list_locked(void);
+
+static void clear_container(lv_obj_t* cont){
+    if(!cont) return;
+    uint32_t child_cnt = lv_obj_get_child_cnt(cont);
+    while(child_cnt>0){
+        lv_obj_t* child = lv_obj_get_child(cont, 0);
+        if(child) lv_obj_delete(child);
+        else break;
+        child_cnt = lv_obj_get_child_cnt(cont);
+    }
+}
+
+static void btn_close_cb(lv_event_t* e){
+    (void)e;
+    if(G.overlay){
+        close_overlay();
+        return;
+    }
+    tt_app_stop();
+}
+
+static void get_season_stats(int season, int* total, int* cached){
+    int t=0,c=0;
+    for(int i=0;i<G.ep_cnt;i++){
+        if(G.eps[i].season==season){
+            t++;
+            if(G.eps[i].seen) c++;
+        }
+    }
+    if(total) *total=t;
+    if(cached) *cached=c;
+}
+
+void ui_update_status_locked(const char* msg){
+    if(G.lbl_status && msg) lv_label_set_text(G.lbl_status, msg);
+}
+
+void ui_update_header_locked(void){
+    if(!G.lbl_title && !G.lbl_season) return;
+    if(G.fetching){
+        // Keep showing current season stats instead of blocking header
+        // status bar already says fetching
+    }
+    if(G.season_cnt==0){
+        if(G.lbl_season) lv_label_set_text(G.lbl_season, "No seasons");
+        return;
+    }
+    int total=0,cached=0;
+    get_season_stats(G.cur_season,&total,&cached);
+    char buf[64];
+    if(total>0){
+        snprintf(buf,sizeof(buf),"S%02d • %d/%d on SD • %d eps", G.cur_season, cached, total, total);
+    }else{
+        snprintf(buf,sizeof(buf),"S%02d • %d eps", G.cur_season, total);
+    }
+    if(G.lbl_season) lv_label_set_text(G.lbl_season, buf);
+    if(G.lbl_title){
+        // Keep app name
+        // optionally update title to count
+        lv_label_set_text(G.lbl_title, "Discovery Mountain");
+    }
+}
+
+static void rebuild_episode_list_locked(void){
+    if(!G.ep_list_cont) return;
+    clear_container(G.ep_list_cont);
+
+    if(G.ep_cnt==0){
+        if(G.fetching){
+            lv_obj_t* lbl=lv_label_create(G.ep_list_cont);
+            lv_label_set_text(lbl,"Fetching episodes...");
+            lv_obj_set_style_text_color(lbl, lv_color_hex(0xAAAAAA),0);
+            lv_obj_align(lbl,LV_ALIGN_TOP_MID,0,20);
+            return;
+        }
+        lv_obj_t* lbl=lv_label_create(G.ep_list_cont);
+        lv_label_set_text(lbl,"No episodes");
+        lv_obj_set_style_text_color(lbl, lv_color_hex(0xAAAAAA),0);
+        return;
+    }
+
+    // Count episodes for cur season
+    int count=0;
+    for(int i=0;i<G.ep_cnt;i++) if(G.eps[i].season==G.cur_season) count++;
+
+    if(count==0){
+        lv_obj_t* lbl=lv_label_create(G.ep_list_cont);
+        lv_label_set_text(lbl,"No episodes in season");
+        lv_obj_set_style_text_color(lbl, lv_color_hex(0xAAAAAA),0);
+        // Also show all if fallback?
+        // list first few from all
+        return;
+    }
+
+    for(int i=0;i<G.ep_cnt;i++){
+        if(G.eps[i].season!=G.cur_season) continue;
+        EpInfo* ep=&G.eps[i];
+
+        // Row container – optimized for low internal heap (4 objs per ep)
+        lv_obj_t* row=lv_obj_create(G.ep_list_cont);
+        lv_obj_set_size(row, LV_PCT(100), 50);
+        lv_obj_set_style_bg_color(row, ep->seen ? lv_color_hex(0x1E2A22) : lv_color_hex(0x222222),0);
+        lv_obj_set_style_bg_opa(row, LV_OPA_COVER,0);
+        lv_obj_set_style_radius(row,8,0);
+        lv_obj_set_style_pad_all(row,6,0);
+        lv_obj_set_style_border_width(row,1,0);
+        lv_obj_set_style_border_color(row, ep->seen ? lv_color_hex(0x2E7D32) : lv_color_hex(0x333333),0);
+        lv_obj_set_flex_flow(row, LV_FLEX_FLOW_ROW);
+        lv_obj_set_flex_align(row, LV_FLEX_ALIGN_SPACE_BETWEEN, LV_FLEX_ALIGN_CENTER, LV_FLEX_ALIGN_CENTER);
+        lv_obj_remove_flag(row, LV_OBJ_FLAG_SCROLLABLE);
+        lv_obj_set_style_pad_gap(row,6,0);
+        lv_obj_add_flag(row, LV_OBJ_FLAG_CLICKABLE);
+        lv_obj_add_event_cb(row, ep_action_cb, LV_EVENT_CLICKED, (void*)(intptr_t)i);
+
+        // Left single label with title (truncated) – we embed meta as second line via \n to save objects
+        lv_obj_t* ltitle=lv_label_create(row);
+        lv_obj_set_flex_grow(ltitle,1);
+        // Truncate title to ~26 chars for display
+        char short_title[30];
+        strncpy(short_title, ep->title, sizeof(short_title)-1);
+        short_title[sizeof(short_title)-1]=0;
+        if(strlen(ep->title) > 26){
+            short_title[23]='.';
+            short_title[24]='.';
+            short_title[25]='.';
+            short_title[26]=0;
+        }
+        char line1[64];
+        snprintf(line1,sizeof(line1),"E%02d: %s", ep->ep_num, short_title);
+        // Second line status
+        char line2[32];
+        int saved = get_saved_pos_for_slug(ep->slug);
+        if(ep->seen){
+            if(saved>5){
+                char tb[16]; fmt_time(tb,saved);
+                snprintf(line2,sizeof(line2),"On SD %s", tb);
+            }else{
+                snprintf(line2,sizeof(line2),"On SD");
+            }
+        }else{
+            snprintf(line2,sizeof(line2),"Not DL");
+        }
+        char tbuf[96];
+        snprintf(tbuf,sizeof(tbuf),"%s\n%s", line1, line2);
+        lv_label_set_text(ltitle, tbuf);
+        lv_obj_set_width(ltitle, LV_PCT(100));
+        lv_label_set_long_mode(ltitle, LV_LABEL_LONG_DOT);
+        lv_obj_set_style_text_font(ltitle, lvgl_get_text_font(FONT_SIZE_SMALL),0);
+        lv_obj_set_style_text_color(ltitle, ep->seen ? lv_color_hex(0xE0E0E0) : lv_color_hex(0xCCCCCC),0);
+
+        // Right side: button
+        lv_obj_t* btn=lv_btn_create(row);
+        lv_obj_set_size(btn, 52, 34);
+        if(ep->seen){
+            lv_obj_set_style_bg_color(btn, lv_color_hex(0x2E7D32),0);
+        }else{
+            lv_obj_set_style_bg_color(btn, lv_color_hex(0x1E88E5),0);
+        }
+        lv_obj_set_style_radius(btn,6,0);
+        lv_obj_t* bl=lv_label_create(btn);
+        lv_label_set_text(bl, ep->seen ? LV_SYMBOL_PLAY : LV_SYMBOL_DOWNLOAD);
+        lv_obj_center(bl);
+        lv_obj_add_event_cb(btn, ep_action_cb, LV_EVENT_CLICKED, (void*)(intptr_t)i);
+    }
+    // Scroll to top after rebuild
+    lv_obj_scroll_to_y(G.ep_list_cont, 0, LV_ANIM_OFF);
+}
+
+void ui_rebuild_episode_list(void){
+    tt_lvgl_lock(portMAX_DELAY);
+    if(G.ep_list_cont) rebuild_episode_list_locked();
+    ui_update_header_locked();
+    tt_lvgl_unlock();
+}
+
+static void ep_action_cb(lv_event_t* e){
+    if(lv_event_get_code(e)!=LV_EVENT_CLICKED) return;
+    // Retrieve idx from user data
+    int idx = (int)(intptr_t)lv_event_get_user_data(e);
+    // Fallback: try event target's user data via current target?
+    // lv_event_get_user_data should already give us the idx
+    if(idx<0 || idx>=G.ep_cnt) return;
+    if(G.downloading) return;
+    // Allow interaction even while fetching – cache remains usable
+
+    EpInfo* ep=&G.eps[idx];
+    ESP_LOGI(TAG,"ep_action idx %d S%02dE%02d seen %d", idx, ep->season, ep->ep_num, ep->seen);
+
+    if(ep->season != G.cur_season){
+        // Shouldn't happen but update cur season to match
+        G.cur_season = ep->season;
+    }
+
+    // Use start_idx which handles both DL and Play
+    tt_lvgl_lock(portMAX_DELAY);
+    if(G.lbl_status){
+        if(ep->seen) lv_label_set_text(G.lbl_status,"Starting player...");
+        else lv_label_set_text(G.lbl_status,"Starting downloader...");
+    }
+    tt_lvgl_unlock();
+
+    start_idx(idx);
+}
+
+static void season_select_cb(lv_event_t* e){
+    if(lv_event_get_code(e)!=LV_EVENT_CLICKED) return;
+    int season_num = (int)(intptr_t)lv_event_get_user_data(e);
+    if(season_num<=0) return;
+    ESP_LOGI(TAG,"Season selected S%02d", season_num);
+    // Defer overlay deletion – deleting ancestor during event is unsafe
+    close_overlay_safe();
+    G.cur_season = season_num;
+    // Save state immediately
+    tt_lvgl_lock(portMAX_DELAY);
+    ui_update_header_locked();
+    rebuild_episode_list_locked();
+    if(G.lbl_status){
+        char buf[40];
+        snprintf(buf,sizeof(buf),"Switched to S%02d", season_num);
+        lv_label_set_text(G.lbl_status, buf);
+    }
+    tt_lvgl_unlock();
+    save_state();
+
+    // Jump to first unseen or first in season
+    int first=-1, first_unseen=-1;
+    for(int i=0;i<G.ep_cnt;i++) if(G.eps[i].season==season_num){
+        if(first==-1) first=i;
+        if(!G.eps[i].seen && first_unseen==-1) first_unseen=i;
+    }
+    int tgt = first_unseen!=-1?first_unseen:first;
+    if(tgt!=-1){
+        // Optional: select ep updates title but we already rebuilt list; keep cur_ep_idx
+        G.cur_ep_idx = tgt;
+        strncpy(G.last_slug, G.eps[tgt].slug, sizeof(G.last_slug)-1);
+        save_state();
+    }
+}
+
+void dropdown_cb(lv_event_t* e){
+    if(lv_event_get_code(e)!=LV_EVENT_VALUE_CHANGED) return;
+    lv_obj_t* dd = (lv_obj_t*)lv_event_get_target(e);
+    int sel=lv_dropdown_get_selected(dd);
+    if(sel<0||sel>=G.season_cnt) return;
+    int sn=G.seasons[sel].num;
+    close_overlay_safe();
+    int first=-1, first_unseen=-1;
+    for(int i=0;i<G.ep_cnt;i++) if(G.eps[i].season==sn){
+        if(first==-1) first=i;
+        if(!G.eps[i].seen && first_unseen==-1) first_unseen=i;
+    }
+    int tgt=first_unseen!=-1?first_unseen:first;
+    if(tgt!=-1){
+        G.cur_season=sn;
+        G.cur_ep_idx=tgt;
+        strncpy(G.last_slug, G.eps[tgt].slug, sizeof(G.last_slug)-1);
+        tt_lvgl_lock(portMAX_DELAY);
+        ui_update_header_locked();
+        rebuild_episode_list_locked();
+        tt_lvgl_unlock();
+        save_state();
+    }
+}
+
+static void close_btn_cb(lv_event_t* e){
+    (void)e;
+    close_overlay_safe();
+}
+
+void btn_refresh_cb(lv_event_t* e){
+    (void)e;
+    if(G.downloading) return;
+    if(G.overlay){ close_overlay(); }
+    if(G.fetching){
+        tt_lvgl_lock(portMAX_DELAY);
+        if(G.lbl_status) lv_label_set_text(G.lbl_status,"Already refreshing...");
+        tt_lvgl_unlock();
+        return;
+    }
+    ESP_LOGI(TAG,"Manual refresh pressed");
+    trigger_manual_refresh();
+}
+
+void btn_seasons_cb(lv_event_t* e){
+    (void)e;
+    if(G.downloading) return;
+    if(G.overlay){ close_overlay(); return; }
+    tt_lvgl_lock(portMAX_DELAY);
+    // Full-screen season selector – parent to active screen to cover whole 240x320, not just root content
+    lv_obj_t* ovl_parent = lv_scr_act();
+    G.overlay=lv_obj_create(ovl_parent);
+    lv_obj_set_size(G.overlay, LV_PCT(100), LV_PCT(100));
+    lv_obj_set_pos(G.overlay, 0, 0);
+    lv_obj_set_style_bg_color(G.overlay, lv_color_hex(0x111111),0);
+    lv_obj_set_style_bg_opa(G.overlay, LV_OPA_COVER,0);
+    lv_obj_set_style_radius(G.overlay,0,0);
+    lv_obj_set_style_border_width(G.overlay,0,0);
+    lv_obj_set_style_pad_all(G.overlay,6,0);
+    lv_obj_set_style_pad_gap(G.overlay,6,0);
+    lv_obj_set_flex_flow(G.overlay, LV_FLEX_FLOW_COLUMN);
+    lv_obj_set_flex_align(G.overlay, LV_FLEX_ALIGN_START, LV_FLEX_ALIGN_START, LV_FLEX_ALIGN_START);
+    lv_obj_remove_flag(G.overlay, LV_OBJ_FLAG_SCROLLABLE);
+
+    // Header row: title + close
+    lv_obj_t* hdr=lv_obj_create(G.overlay);
+    lv_obj_set_size(hdr, LV_PCT(100), LV_SIZE_CONTENT);
+    lv_obj_set_style_bg_opa(hdr, LV_OPA_TRANSP,0);
+    lv_obj_set_style_border_width(hdr,0,0);
+    lv_obj_set_style_pad_all(hdr,2,0);
+    lv_obj_set_flex_flow(hdr, LV_FLEX_FLOW_ROW);
+    lv_obj_set_flex_align(hdr, LV_FLEX_ALIGN_SPACE_BETWEEN, LV_FLEX_ALIGN_CENTER, LV_FLEX_ALIGN_CENTER);
+    lv_obj_remove_flag(hdr, LV_OBJ_FLAG_SCROLLABLE);
+
+    lv_obj_t* title=lv_label_create(hdr);
+    lv_label_set_text(title,"Select Season");
+    lv_obj_set_style_text_font(title, lvgl_get_text_font(FONT_SIZE_DEFAULT),0);
+    lv_obj_set_style_text_color(title, lv_color_hex(0xFFFFFF),0);
+    lv_obj_set_flex_grow(title,1);
+
+    lv_obj_t* bc=lv_btn_create(hdr);
+    lv_obj_set_size(bc, 40, 36);
+    lv_obj_set_style_bg_color(bc, lv_color_hex(0x333333),0);
+    lv_obj_set_style_radius(bc,6,0);
+    lv_obj_t* lc=lv_label_create(bc);
+    lv_label_set_text(lc, LV_SYMBOL_CLOSE);
+    lv_obj_set_style_text_font(lc, lvgl_get_text_font(FONT_SIZE_SMALL),0);
+    lv_obj_center(lc);
+    lv_obj_add_event_cb(bc,close_btn_cb,LV_EVENT_CLICKED,NULL);
+
+    // Scrollable list container fills rest
+    G.season_list_cont=lv_obj_create(G.overlay);
+    lv_obj_set_size(G.season_list_cont, LV_PCT(100), LV_PCT(100));
+    lv_obj_set_flex_grow(G.season_list_cont,1);
+    lv_obj_set_style_bg_color(G.season_list_cont, lv_color_hex(0x0E0E0E),0);
+    lv_obj_set_style_radius(G.season_list_cont,8,0);
+    lv_obj_set_style_pad_all(G.season_list_cont,6,0);
+    lv_obj_set_flex_flow(G.season_list_cont, LV_FLEX_FLOW_COLUMN);
+    lv_obj_set_style_pad_gap(G.season_list_cont,6,0);
+    lv_obj_add_flag(G.season_list_cont, LV_OBJ_FLAG_SCROLLABLE);
+    lv_obj_set_scrollbar_mode(G.season_list_cont, LV_SCROLLBAR_MODE_AUTO);
+
+    for(int i=0;i<G.season_cnt;i++){
+        int sn=G.seasons[i].num;
+        int total,cached;
+        get_season_stats(sn,&total,&cached);
+        lv_obj_t* btn=lv_btn_create(G.season_list_cont);
+        lv_obj_set_size(btn, LV_PCT(100), 52);
+        lv_obj_set_style_bg_color(btn, sn==G.cur_season ? lv_color_hex(0x2E7D32) : lv_color_hex(0x222222),0);
+        lv_obj_set_style_radius(btn,8,0);
+        lv_obj_set_style_pad_all(btn,10,0);
+        lv_obj_set_style_border_width(btn,1,0);
+        lv_obj_set_style_border_color(btn, sn==G.cur_season ? lv_color_hex(0x4CAF50) : lv_color_hex(0x333333),0);
+        lv_obj_add_event_cb(btn, season_select_cb, LV_EVENT_CLICKED, (void*)(intptr_t)sn);
+        lv_obj_set_flex_flow(btn, LV_FLEX_FLOW_ROW);
+        lv_obj_set_flex_align(btn, LV_FLEX_ALIGN_SPACE_BETWEEN, LV_FLEX_ALIGN_CENTER, LV_FLEX_ALIGN_CENTER);
+
+        char blabel[48];
+        if(total>0){
+            snprintf(blabel,sizeof(blabel),"Season %02d  %d/%d on SD", sn, cached, total);
+        }else{
+            snprintf(blabel,sizeof(blabel),"Season %02d  %d eps", sn, total);
+        }
+        lv_obj_t* l1=lv_label_create(btn);
+        lv_label_set_text(l1, blabel);
+        lv_obj_set_style_text_font(l1, lvgl_get_text_font(FONT_SIZE_DEFAULT),0);
+        lv_obj_set_flex_grow(l1,1);
+
+        if(sn==G.cur_season){
+            lv_obj_t* lcheck=lv_label_create(btn);
+            lv_label_set_text(lcheck, LV_SYMBOL_OK);
+            lv_obj_set_style_text_color(lcheck, lv_color_hex(0x4CAF50),0);
+        }
+    }
+
+    tt_lvgl_unlock();
+}
+
+void btn_dl_season_cb(lv_event_t* e){
+    (void)e;
+    if(G.downloading) return;
+    if(G.ep_cnt==0) return;
+
+    int season = G.cur_season;
+    ESP_LOGI(TAG, "DL Missing S%02d pressed", season);
+
+    tt_lvgl_lock(portMAX_DELAY);
+    close_overlay();
+    if(G.dl_overlay) hide_dl_overlay();
+    if(G.lbl_status){
+        char buf[40];
+        snprintf(buf,sizeof(buf),"Checking S%02d missing...", season);
+        lv_label_set_text(G.lbl_status, buf);
+    }
+    tt_lvgl_unlock();
+
+    if (!download_season(season)) {
+        tt_lvgl_lock(portMAX_DELAY);
+        if(G.lbl_status) lv_label_set_text(G.lbl_status,"DL Season failed – no missing?");
+        tt_lvgl_unlock();
+    }
+}
+
+void build_ui(lv_obj_t* parent){
+    tt_lvgl_lock(portMAX_DELAY);
+    lv_obj_t* root = lv_obj_create(parent);
+    G.root = root;
+    lv_obj_set_size(root,LV_PCT(100),LV_PCT(100));
+    lv_obj_set_style_bg_color(root,lv_color_hex(0x111111),0);
+    lv_obj_set_style_pad_all(root,6,0);
+    lv_obj_set_style_pad_gap(root,6,0);
+    lv_obj_set_style_border_width(root,0,0);
+    lv_obj_set_flex_flow(root, LV_FLEX_FLOW_COLUMN);
+    lv_obj_set_flex_align(root, LV_FLEX_ALIGN_START, LV_FLEX_ALIGN_START, LV_FLEX_ALIGN_START);
+    lv_obj_remove_flag(root, LV_OBJ_FLAG_SCROLLABLE);
+
+    // Header container
+    lv_obj_t* header=lv_obj_create(root);
+    lv_obj_set_size(header, LV_PCT(100), LV_SIZE_CONTENT);
+    lv_obj_set_style_bg_opa(header, LV_OPA_TRANSP,0);
+    lv_obj_set_style_border_width(header,0,0);
+    lv_obj_set_style_pad_all(header,2,0);
+    lv_obj_set_style_pad_gap(header,6,0);
+    lv_obj_set_flex_flow(header, LV_FLEX_FLOW_ROW);
+    lv_obj_set_flex_align(header, LV_FLEX_ALIGN_SPACE_BETWEEN, LV_FLEX_ALIGN_CENTER, LV_FLEX_ALIGN_CENTER);
+    lv_obj_remove_flag(header, LV_OBJ_FLAG_SCROLLABLE);
+
+    lv_obj_t* header_left=lv_obj_create(header);
+    lv_obj_set_size(header_left, LV_PCT(80), LV_SIZE_CONTENT);
+    lv_obj_set_style_bg_opa(header_left, LV_OPA_TRANSP,0);
+    lv_obj_set_style_border_width(header_left,0,0);
+    lv_obj_set_style_pad_all(header_left,0,0);
+    lv_obj_set_flex_flow(header_left, LV_FLEX_FLOW_COLUMN);
+    lv_obj_set_style_pad_gap(header_left,2,0);
+    lv_obj_remove_flag(header_left, LV_OBJ_FLAG_SCROLLABLE);
+    lv_obj_set_flex_grow(header_left,1);
+
+    G.lbl_title=lv_label_create(header_left);
+    lv_label_set_text(G.lbl_title,"Discovery Mountain");
+    lv_obj_set_style_text_font(G.lbl_title, lvgl_get_text_font(FONT_SIZE_DEFAULT), 0);
+    lv_obj_set_style_text_color(G.lbl_title, lv_color_hex(0xFFFFFF),0);
+
+    G.lbl_season=lv_label_create(header_left);
+    lv_label_set_text(G.lbl_season,"Loading seasons...");
+    lv_obj_set_style_text_font(G.lbl_season, lvgl_get_text_font(FONT_SIZE_SMALL),0);
+    lv_obj_set_style_text_color(G.lbl_season,lv_color_hex(0xAAAAAA),0);
+
+    // Close button top right
+    lv_obj_t* btn_close=lv_btn_create(header);
+    lv_obj_set_size(btn_close, 36, 32);
+    lv_obj_set_style_bg_color(btn_close, lv_color_hex(0x333333),0);
+    lv_obj_set_style_radius(btn_close,6,0);
+    lv_obj_t* l_close=lv_label_create(btn_close);
+    lv_label_set_text(l_close, LV_SYMBOL_CLOSE);
+    lv_obj_set_style_text_font(l_close, lvgl_get_text_font(FONT_SIZE_SMALL),0);
+    lv_obj_center(l_close);
+    lv_obj_add_event_cb(btn_close, btn_close_cb, LV_EVENT_CLICKED, NULL);
+
+    // Action row: Seasons + Refresh (DL Missing removed per UX simplification)
+    lv_obj_t* row=lv_obj_create(root);
+    lv_obj_set_size(row,LV_PCT(100),44);
+    lv_obj_set_flex_flow(row,LV_FLEX_FLOW_ROW);
+    lv_obj_set_flex_align(row,LV_FLEX_ALIGN_SPACE_EVENLY,LV_FLEX_ALIGN_CENTER,LV_FLEX_ALIGN_CENTER);
+    lv_obj_set_style_bg_opa(row,LV_OPA_TRANSP,0);
+    lv_obj_set_style_border_width(row,0,0);
+    lv_obj_set_style_pad_all(row,0,0);
+    lv_obj_set_style_pad_gap(row,8,0);
+    lv_obj_remove_flag(row, LV_OBJ_FLAG_SCROLLABLE);
+
+    lv_obj_t* bs=lv_btn_create(row);
+    lv_obj_set_size(bs,LV_PCT(48),36);
+    G.btn_seasons=bs;
+    lv_obj_set_style_bg_color(bs, lv_color_hex(0x333333),0);
+    lv_obj_set_style_radius(bs,6,0);
+    lv_obj_t* ls=lv_label_create(bs);
+    lv_label_set_text(ls,"Seasons");
+    lv_obj_set_style_text_font(ls, lvgl_get_text_font(FONT_SIZE_SMALL),0);
+    lv_obj_center(ls);
+    lv_obj_add_event_cb(bs,btn_seasons_cb,LV_EVENT_CLICKED,NULL);
+
+    lv_obj_t* br=lv_btn_create(row);
+    lv_obj_set_size(br,LV_PCT(48),36);
+    G.btn_refresh=br;
+    lv_obj_set_style_bg_color(br, lv_color_hex(0x444444), 0);
+    lv_obj_set_style_radius(br,6,0);
+    lv_obj_t* lr=lv_label_create(br);
+    lv_label_set_text(lr, LV_SYMBOL_REFRESH " Refresh");
+    lv_obj_set_style_text_font(lr, lvgl_get_text_font(FONT_SIZE_SMALL),0);
+    lv_obj_center(lr);
+    lv_obj_add_event_cb(br,btn_refresh_cb,LV_EVENT_CLICKED,NULL);
+
+    G.btn_dl_missing=NULL;
+
+    // Episode list container – fills remaining space
+    G.ep_list_cont=lv_obj_create(root);
+    lv_obj_set_size(G.ep_list_cont, LV_PCT(100), LV_PCT(100));
+    lv_obj_set_flex_grow(G.ep_list_cont, 1);
+    lv_obj_set_style_bg_color(G.ep_list_cont, lv_color_hex(0x0E0E0E),0);
+    lv_obj_set_style_bg_opa(G.ep_list_cont, LV_OPA_COVER,0);
+    lv_obj_set_style_radius(G.ep_list_cont,8,0);
+    lv_obj_set_style_pad_all(G.ep_list_cont,4,0);
+    lv_obj_set_style_pad_gap(G.ep_list_cont,4,0);
+    lv_obj_set_flex_flow(G.ep_list_cont, LV_FLEX_FLOW_COLUMN);
+    lv_obj_set_flex_align(G.ep_list_cont, LV_FLEX_ALIGN_START, LV_FLEX_ALIGN_START, LV_FLEX_ALIGN_START);
+    // Ensure scrollable
+    lv_obj_add_flag(G.ep_list_cont, LV_OBJ_FLAG_SCROLLABLE);
+    lv_obj_set_scrollbar_mode(G.ep_list_cont, LV_SCROLLBAR_MODE_AUTO);
+
+    lv_obj_t* hint=lv_label_create(G.ep_list_cont);
+    lv_label_set_text(hint,"Loading episodes...");
+    lv_obj_set_style_text_color(hint, lv_color_hex(0x888888),0);
+    lv_obj_set_style_text_font(hint, lvgl_get_text_font(FONT_SIZE_SMALL),0);
+
+    // Status bar removed per UX request – no help label
+    G.lbl_status=NULL;
+
+    // Legacy placeholders nulled
+    G.lbl_meta=NULL;
+    G.bar=NULL;
+    G.lbl_time=NULL;
+    G.btn_play=NULL;
+    G.dl_overlay=NULL;
+    G.ui_timer_handle=NULL;
+
+    G.ui_timer_handle = lv_timer_create(ui_timer,300,NULL);
+    tt_lvgl_unlock();
+}
+
+void ui_deinit(void){
+    if(G.ui_timer_handle){
+        lv_timer_delete(G.ui_timer_handle);
+        G.ui_timer_handle=NULL;
+    }
+}
+
+void ui_timer(lv_timer_t* t){
+    (void)t;
+    // If app is closing (root null) skip
+    if(!G.root) return;
+    if(G.fetching){
+        return;
+    }
+    if(G.downloading && G.dl_overlay){
+        update_dl_overlay_ui();
+    }
+}
+
+void btn_play_cb(lv_event_t* e){ (void)e; /* legacy, not used */ }
+void btn_prev_cb(lv_event_t* e){ (void)e; /* legacy */ }
+void btn_next_cb(lv_event_t* e){ (void)e; /* legacy */ }
@@ -0,0 +1,29 @@
+#pragma once
+
+#include "app_context.h"
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+void build_ui(lv_obj_t* parent);
+void ui_timer(lv_timer_t* t);
+
+void btn_play_cb(lv_event_t* e);
+void btn_prev_cb(lv_event_t* e);
+void btn_next_cb(lv_event_t* e);
+void btn_seasons_cb(lv_event_t* e);
+void btn_dl_season_cb(lv_event_t* e);
+void btn_refresh_cb(lv_event_t* e);
+void close_overlay(void);
+void dropdown_cb(lv_event_t* e);
+
+// New library UI helpers
+void ui_rebuild_episode_list(void);
+void ui_update_header_locked(void);
+void ui_update_status_locked(const char* msg);
+void ui_deinit(void);
+
+#ifdef __cplusplus
+}
+#endif
@@ -0,0 +1,7 @@
+manifest.version=0.2
+target.sdk=0.8.0-dev
+target.platforms=esp32s3
+app.id=one.tactility.discoverymountain
+app.name=Discovery Mountain
+app.version.name=0.1.0
+app.version.code=1
@@ -0,0 +1,16 @@
+cmake_minimum_required(VERSION 3.20)
+
+include($ENV{IDF_PATH}/tools/cmake/project.cmake)
+
+if (DEFINED ENV{TACTILITY_SDK_PATH})
+    set(TACTILITY_SDK_PATH $ENV{TACTILITY_SDK_PATH})
+else()
+    set(TACTILITY_SDK_PATH "../../release/TactilitySDK")
+    message(WARNING "⚠️ TACTILITY_SDK_PATH environment variable is not set, defaulting to ${TACTILITY_SDK_PATH}")
+endif()
+
+include("${TACTILITY_SDK_PATH}/TactilitySDK.cmake")
+set(EXTRA_COMPONENT_DIRS ${TACTILITY_SDK_PATH})
+
+project(ImmichElias)
+tactility_project(ImmichElias)
@@ -0,0 +1,9 @@
+file(GLOB_RECURSE SOURCE_FILES Source/*.c)
+set(CJSON_SOURCE "$ENV{IDF_PATH}/components/json/cJSON/cJSON.c")
+
+idf_component_register(
+    SRCS ${SOURCE_FILES} ${CJSON_SOURCE}
+    INCLUDE_DIRS Source "$ENV{IDF_PATH}/components/json/cJSON"
+    REQUIRES TactilitySDK esp_http_client
+)
+target_compile_options(${COMPONENT_LIB} PRIVATE -Wno-format-truncation -Wno-unused-but-set-variable -Wno-unused-function -Wno-unused-variable)
@@ -0,0 +1,7 @@
+manifest.version=0.2
+target.sdk=0.8.0-dev
+target.platforms=esp32s3,esp32p4
+app.id=one.tactility.imichelias
+app.version.name=0.1.0
+app.version.code=1
+app.name=Immich Elias
@@ -0,0 +1,16 @@
+cmake_minimum_required(VERSION 3.20)
+
+include($ENV{IDF_PATH}/tools/cmake/project.cmake)
+
+if (DEFINED ENV{TACTILITY_SDK_PATH})
+    set(TACTILITY_SDK_PATH $ENV{TACTILITY_SDK_PATH})
+else()
+    set(TACTILITY_SDK_PATH "../../release/TactilitySDK")
+    message(WARNING "⚠️ TACTILITY_SDK_PATH environment variable is not set, defaulting to ${TACTILITY_SDK_PATH}")
+endif()
+
+include("${TACTILITY_SDK_PATH}/TactilitySDK.cmake")
+set(EXTRA_COMPONENT_DIRS ${TACTILITY_SDK_PATH})
+
+project(LuaGame)
+tactility_project(LuaGame)
@@ -0,0 +1,72 @@
+# LuaGame - Lua Interpreter Game Engine
+
+External ELF app that runs Lua games on Tactility OS (ES3C35P 320x480 tested on 192.168.68.107).
+
+## How it works
+- Embeds Lua 5.4.7 source (no external dependency, avoids missing symbol issues)
+- Lua init + game loop run in dedicated 16K stack FreeRTOS task to avoid GUI task (4096 bytes) stack overflow
+- Game framebuffer: 240x240 RGB565 in PSRAM, rendered via LVGL canvas (`lv_canvas_set_buffer` + `lv_obj_invalidate` with `tt_lvgl_lock`)
+- Direct framebuffer text using 8x8 bitmap font (`font8x8.h`) – 17+ FPS vs 15 FPS with LVGL labels
+- **Sys API** (original Tactility breakout.lua):
+  - `sys.log(msg)`
+  - `sys.clear(hexColor)`
+  - `sys.print(x,y,text,hexColor)` – direct FB via `draw_text8`
+  - `sys.rect(x,y,w,h,hexColor,filled)` – border or filled
+  - `sys.circle(x,y,r,hexColor,filled)` – midpoint + filled scan
+  - `sys.line(x0,y0,x1,y1,hexColor)`
+  - `sys.touch() -> pressed, tx, ty` (touch mapped to 240 game space)
+  - `sys.tone(note, duration, waveform, volume)` → SfxEngine `playNote`
+  - `sys.sfx(name)` → SfxEngine `play(SfxId)` mapping: confirm, coin, hurt, gameover, levelup, brickhit, etc.
+- **Pico API** compatibility (from `/Users/adolforeyna/Projects/pico-bare-metal/Adolfo/basic1/games/lua_examples`):
+  - `game.width()`, `height()`, `set_frame_updates(bool)`, `exit()`, `game.vars` persistent table
+  - `renderer.clear(white)`, `pixel(x,y,on)`, `line(x0,y0,x1,y1,on,width)`, `rect(x,y,w,h,on,filled)`, `circle(x,y,r,on,filled)`, `triangle(x0,y0,x1,y1,x2,y2,on,filled)`, `text(x,y,txt,on)`, `text_scaled(x,y,txt,on,scale)` (scale 1-4)
+  - `INPUT` constants: `NONE=0, TOUCH_DOWN=1, TOUCH_MOVE=2, TOUCH_UP=3, BUTTON_0=4, BUTTON_1=5, FRAME_TICK=6, GESTURE=7`
+  - Event system: generates `TOUCH_DOWN/MOVE/UP` from touch state + `FRAME_TICK` every frame, calls `update(event)` returning bool redraw
+  - Detection: if source contains `renderer.` → Pico mode, else sys mode
+- Embedded games:
+  - `embedded_breakout_lua_src` – fast breakout (ball 4.5 vs 2, paddle 0.25 spin) – default
+  - `pico_games.h` auto-generated with 17 games: 2048, air_hockey, asteroids, ball, breakout, counter, flappy_bird, lunar_lander, memory_match, pacman, pong, simon_says, snake, solitaire, tetris, tic_tac_toe – tested Pong runs at 17.5 FPS
+- File loading: PSRAM buffer + `luaL_loadbuffer` to avoid `luaL_loadfile` stack issues, supports SD paths `/sdcard/lua/*.lua`
+
+## Symbol fixes
+Previous missing: `clearerr`, `clock`, `getenv`, `gmtime`, `setlocale`, `setvbuf`, `tmpfile`, `tmpnam`, `ungetc`, `lv_canvas_get_draw_buf`, `lv_draw_buf_invalidate_cache`, `lv_image_cache_drop`.
+Fixed by local stubs + avoiding unexported APIs, only `lv_canvas_create`, `lv_canvas_set_buffer`, `lv_obj_invalidate`, `tt_lvgl_lock/unlock`.
+
+## Performance
+- Ball speed: 2 → 4.5 (2.25x faster), configurable in embedded string
+- FPS: 15 → 17.5 FPS after direct FB text + dedicated game loop task
+- Memory: internal low ~2-3KB (PSRAM used for FB and Lua heap), stable, no crash 20s+
+
+## Build / Install
+```bash
+cd /Users/adolforeyna/Projects/Tactility/apps
+unset PYTHONPATH; unset PYTHONHOME
+export IDF_PYTHON_ENV_PATH=/Users/adolforeyna/.espressif/python_env/idf5.3_py3.9_env
+source /Users/adolforeyna/esp/esp-idf/export.sh
+export TACTILITY_SDK_PATH=/Users/adolforeyna/Projects/Tactility/firmware/release/TactilitySDK
+export ESP_IDF_VERSION=5.5
+python tactility.py Apps/LuaGame build esp32s3 --local-sdk
+curl -X PUT http://192.168.68.107/api/apps/install -F "file=@Apps/LuaGame/build/LuaGame.app"
+curl -X POST "http://192.168.68.107/api/apps/run?id=one.tactility.luagame"
+```
+
+## Porting Pico Games
+Yes – all 17 examples from `pico-bare-metal/Adolfo/basic1/games/lua_examples` use:
+- `game.vars` state machine
+- `renderer.*` monochrome API (boolean on/off → mapped to white/black RGB565)
+- `INPUT.TOUCH_*` + `FRAME_TICK`
+
+Our engine now implements compatibility shim in C (see `l_renderer_*`, `l_game_*`, INPUT table). Pong tested:
+```
+[LuaGame] using Pico test game: Pong (7538 bytes)
+Pong initialized
+FPS 17.5
+```
+Other games (snake, tetris, 2048, etc.) should work same – they are ~50-880 lines, no file I/O, pure math/table. To add selector UI, list `pico_games[]` via LVGL list and load selected `src`.
+
+## TODO
+- Game selector UI (menu_wrapper + game_wrapper, hide/show)
+- Copy pico examples to SD via USB MSC or bundle selector
+- Audio mapping for Pico games (currently sys.sfx only, could map to renderer events)
+- Scale canvas to full 320x480 or dynamic `game.width/height`
+- Fix internal memory low warnings (reduce SfxEngine voices or Lua heap)
@@ -0,0 +1,10 @@
+file(GLOB_RECURSE SOURCE_FILES Source/*.c*)
+file(GLOB_RECURSE SFX_ENGINE_FILES ../../../Libraries/SfxEngine/Source/*.c*)
+
+idf_component_register(
+    SRCS ${SOURCE_FILES} ${SFX_ENGINE_FILES}
+    INCLUDE_DIRS Source Source/lua ../../../Libraries/SfxEngine/Include ../../../Libraries/TactilityCpp/Include
+    REQUIRES TactilitySDK
+)
+
+target_compile_options(${COMPONENT_LIB} PRIVATE -Wno-unused-variable -Wno-unused-function -Wno-implicit-fallthrough -Wno-sign-compare -Wno-unused-but-set-variable -Wno-missing-field-initializers -Wno-misleading-indentation)
@@ -0,0 +1,78 @@
+#include "audio.h"
+#include "SfxEngine.h"
+#include <string.h>
+#include <stdio.h>
+#include <strings.h>
+
+static SfxEngine* g_engine = nullptr;
+
+void audio_init(void) {
+    if (g_engine) return;
+    g_engine = new SfxEngine();
+    if (!g_engine->start()) {
+        printf("[Audio] SfxEngine start failed\n");
+        delete g_engine;
+        g_engine = nullptr;
+    } else {
+        printf("[Audio] SfxEngine started\n");
+    }
+}
+
+void audio_deinit(void) {
+    if (g_engine) {
+        g_engine->stop();
+        delete g_engine;
+        g_engine = nullptr;
+        printf("[Audio] SfxEngine stopped\n");
+    }
+}
+
+static SfxId sfx_name_to_id(const char* name) {
+    if (!name) return SfxId::Click;
+    if (strcasecmp(name, "confirm")==0) return SfxId::Confirm;
+    if (strcasecmp(name, "coin")==0) return SfxId::Coin;
+    if (strcasecmp(name, "hurt")==0) return SfxId::Hurt;
+    if (strcasecmp(name, "gameover")==0) return SfxId::GameOver;
+    if (strcasecmp(name, "levelup")==0) return SfxId::LevelUp;
+    if (strcasecmp(name, "powerup")==0) return SfxId::Powerup;
+    if (strcasecmp(name, "brickhit")==0) return SfxId::BrickHit;
+    if (strcasecmp(name, "click")==0) return SfxId::Click;
+    if (strcasecmp(name, "blip")==0) return SfxId::Blip;
+    if (strcasecmp(name, "jump")==0) return SfxId::Jump;
+    if (strcasecmp(name, "laser")==0) return SfxId::Laser;
+    if (strcasecmp(name, "explosion")==0) return SfxId::Explosion;
+    if (strcasecmp(name, "pickup")==0) return SfxId::Pickup;
+    if (strcasecmp(name, "alert")==0) return SfxId::Alert;
+    if (strcasecmp(name, "success")==0) return SfxId::Success;
+    // default mapping
+    return SfxId::Click;
+}
+
+void audio_play_sfx(const char* name) {
+    if (!g_engine) return;
+    SfxId id = sfx_name_to_id(name);
+    g_engine->play(id);
+    printf("[Audio] sfx %s -> %d\n", name, (int)id);
+}
+
+void audio_play_tone(int note, int duration_ms, const char* waveform, float volume) {
+    if (!g_engine) return;
+    if (volume <=0) volume = 0.5f;
+    if (duration_ms <=0) duration_ms = 80;
+    // waveform string: sine, square, triangle, etc
+    SfxWaveType wave = SfxWaveType::Square;
+    if (waveform) {
+        if (strcasecmp(waveform,"sine")==0) wave = SfxWaveType::Sine;
+        else if (strcasecmp(waveform,"triangle")==0) wave = SfxWaveType::Triangle;
+        else if (strcasecmp(waveform,"square")==0) wave = SfxWaveType::Square;
+        else if (strcasecmp(waveform,"saw")==0 || strcasecmp(waveform,"sawtooth")==0) wave = SfxWaveType::Sawtooth;
+        else if (strcasecmp(waveform,"noise")==0) wave = SfxWaveType::Noise;
+        else if (strcasecmp(waveform,"pulse")==0) wave = SfxWaveType::Pulse25;
+    }
+    // Use voice 0 for tone, playNote API: voice, pitch, durationMs, wave, volume...
+    // SfxEngine has playNote? Check header: playNote exists.
+    // The signature in SfxEngine: bool playNote(uint8_t voice, uint8_t pitch, ...)
+    // We'll use simplified: play note on voice 0
+    g_engine->playNote(0, (uint8_t)note, (uint16_t)duration_ms, wave, volume);
+    printf("[Audio] tone note=%d dur=%d wave=%s vol=%.2f\n", note, duration_ms, waveform?waveform:"-", volume);
+}
@@ -0,0 +1,13 @@
+#pragma once
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+void audio_init(void);
+void audio_deinit(void);
+void audio_play_sfx(const char* name);
+void audio_play_tone(int note, int duration_ms, const char* waveform, float volume);
+
+#ifdef __cplusplus
+}
+#endif
@@ -0,0 +1,152 @@
+/**
+ * 8x8 monochrome bitmap fonts for rendering
+ * Author: Daniel Hepper <daniel@hepper.net>
+ *
+ * License: Public Domain
+ *
+ * Based on:
+ * // Summary: font8x8.h
+ * // 8x8 monochrome bitmap fonts for rendering
+ * //
+ * // Author:
+ * //     Marcel Sondaar
+ * //     International Business Machines (public domain VGA fonts)
+ * //
+ * // License:
+ * //     Public Domain
+ *
+ * Fetched from: http://dimensionalrift.homelinux.net/combuster/mos3/?p=viewsource&file=/modules/gfx/font8_8.asm
+ **/
+
+// Constant: font8x8_basic
+// Contains an 8x8 font map for unicode points U+0000 - U+007F (basic latin)
+char font8x8_basic[128][8] = {
+    { 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00},   // U+0000 (nul)
+    { 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00},   // U+0001
+    { 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00},   // U+0002
+    { 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00},   // U+0003
+    { 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00},   // U+0004
+    { 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00},   // U+0005
+    { 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00},   // U+0006
+    { 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00},   // U+0007
+    { 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00},   // U+0008
+    { 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00},   // U+0009
+    { 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00},   // U+000A
+    { 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00},   // U+000B
+    { 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00},   // U+000C
+    { 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00},   // U+000D
+    { 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00},   // U+000E
+    { 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00},   // U+000F
+    { 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00},   // U+0010
+    { 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00},   // U+0011
+    { 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00},   // U+0012
+    { 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00},   // U+0013
+    { 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00},   // U+0014
+    { 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00},   // U+0015
+    { 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00},   // U+0016
+    { 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00},   // U+0017
+    { 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00},   // U+0018
+    { 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00},   // U+0019
+    { 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00},   // U+001A
+    { 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00},   // U+001B
+    { 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00},   // U+001C
+    { 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00},   // U+001D
+    { 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00},   // U+001E
+    { 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00},   // U+001F
+    { 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00},   // U+0020 (space)
+    { 0x18, 0x3C, 0x3C, 0x18, 0x18, 0x00, 0x18, 0x00},   // U+0021 (!)
+    { 0x36, 0x36, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00},   // U+0022 (")
+    { 0x36, 0x36, 0x7F, 0x36, 0x7F, 0x36, 0x36, 0x00},   // U+0023 (#)
+    { 0x0C, 0x3E, 0x03, 0x1E, 0x30, 0x1F, 0x0C, 0x00},   // U+0024 ($)
+    { 0x00, 0x63, 0x33, 0x18, 0x0C, 0x66, 0x63, 0x00},   // U+0025 (%)
+    { 0x1C, 0x36, 0x1C, 0x6E, 0x3B, 0x33, 0x6E, 0x00},   // U+0026 (&)
+    { 0x06, 0x06, 0x03, 0x00, 0x00, 0x00, 0x00, 0x00},   // U+0027 (')
+    { 0x18, 0x0C, 0x06, 0x06, 0x06, 0x0C, 0x18, 0x00},   // U+0028 (()
+    { 0x06, 0x0C, 0x18, 0x18, 0x18, 0x0C, 0x06, 0x00},   // U+0029 ())
+    { 0x00, 0x66, 0x3C, 0xFF, 0x3C, 0x66, 0x00, 0x00},   // U+002A (*)
+    { 0x00, 0x0C, 0x0C, 0x3F, 0x0C, 0x0C, 0x00, 0x00},   // U+002B (+)
+    { 0x00, 0x00, 0x00, 0x00, 0x00, 0x0C, 0x0C, 0x06},   // U+002C (,)
+    { 0x00, 0x00, 0x00, 0x3F, 0x00, 0x00, 0x00, 0x00},   // U+002D (-)
+    { 0x00, 0x00, 0x00, 0x00, 0x00, 0x0C, 0x0C, 0x00},   // U+002E (.)
+    { 0x60, 0x30, 0x18, 0x0C, 0x06, 0x03, 0x01, 0x00},   // U+002F (/)
+    { 0x3E, 0x63, 0x73, 0x7B, 0x6F, 0x67, 0x3E, 0x00},   // U+0030 (0)
+    { 0x0C, 0x0E, 0x0C, 0x0C, 0x0C, 0x0C, 0x3F, 0x00},   // U+0031 (1)
+    { 0x1E, 0x33, 0x30, 0x1C, 0x06, 0x33, 0x3F, 0x00},   // U+0032 (2)
+    { 0x1E, 0x33, 0x30, 0x1C, 0x30, 0x33, 0x1E, 0x00},   // U+0033 (3)
+    { 0x38, 0x3C, 0x36, 0x33, 0x7F, 0x30, 0x78, 0x00},   // U+0034 (4)
+    { 0x3F, 0x03, 0x1F, 0x30, 0x30, 0x33, 0x1E, 0x00},   // U+0035 (5)
+    { 0x1C, 0x06, 0x03, 0x1F, 0x33, 0x33, 0x1E, 0x00},   // U+0036 (6)
+    { 0x3F, 0x33, 0x30, 0x18, 0x0C, 0x0C, 0x0C, 0x00},   // U+0037 (7)
+    { 0x1E, 0x33, 0x33, 0x1E, 0x33, 0x33, 0x1E, 0x00},   // U+0038 (8)
+    { 0x1E, 0x33, 0x33, 0x3E, 0x30, 0x18, 0x0E, 0x00},   // U+0039 (9)
+    { 0x00, 0x0C, 0x0C, 0x00, 0x00, 0x0C, 0x0C, 0x00},   // U+003A (:)
+    { 0x00, 0x0C, 0x0C, 0x00, 0x00, 0x0C, 0x0C, 0x06},   // U+003B (;)
+    { 0x18, 0x0C, 0x06, 0x03, 0x06, 0x0C, 0x18, 0x00},   // U+003C (<)
+    { 0x00, 0x00, 0x3F, 0x00, 0x00, 0x3F, 0x00, 0x00},   // U+003D (=)
+    { 0x06, 0x0C, 0x18, 0x30, 0x18, 0x0C, 0x06, 0x00},   // U+003E (>)
+    { 0x1E, 0x33, 0x30, 0x18, 0x0C, 0x00, 0x0C, 0x00},   // U+003F (?)
+    { 0x3E, 0x63, 0x7B, 0x7B, 0x7B, 0x03, 0x1E, 0x00},   // U+0040 (@)
+    { 0x0C, 0x1E, 0x33, 0x33, 0x3F, 0x33, 0x33, 0x00},   // U+0041 (A)
+    { 0x3F, 0x66, 0x66, 0x3E, 0x66, 0x66, 0x3F, 0x00},   // U+0042 (B)
+    { 0x3C, 0x66, 0x03, 0x03, 0x03, 0x66, 0x3C, 0x00},   // U+0043 (C)
+    { 0x1F, 0x36, 0x66, 0x66, 0x66, 0x36, 0x1F, 0x00},   // U+0044 (D)
+    { 0x7F, 0x46, 0x16, 0x1E, 0x16, 0x46, 0x7F, 0x00},   // U+0045 (E)
+    { 0x7F, 0x46, 0x16, 0x1E, 0x16, 0x06, 0x0F, 0x00},   // U+0046 (F)
+    { 0x3C, 0x66, 0x03, 0x03, 0x73, 0x66, 0x7C, 0x00},   // U+0047 (G)
+    { 0x33, 0x33, 0x33, 0x3F, 0x33, 0x33, 0x33, 0x00},   // U+0048 (H)
+    { 0x1E, 0x0C, 0x0C, 0x0C, 0x0C, 0x0C, 0x1E, 0x00},   // U+0049 (I)
+    { 0x78, 0x30, 0x30, 0x30, 0x33, 0x33, 0x1E, 0x00},   // U+004A (J)
+    { 0x67, 0x66, 0x36, 0x1E, 0x36, 0x66, 0x67, 0x00},   // U+004B (K)
+    { 0x0F, 0x06, 0x06, 0x06, 0x46, 0x66, 0x7F, 0x00},   // U+004C (L)
+    { 0x63, 0x77, 0x7F, 0x7F, 0x6B, 0x63, 0x63, 0x00},   // U+004D (M)
+    { 0x63, 0x67, 0x6F, 0x7B, 0x73, 0x63, 0x63, 0x00},   // U+004E (N)
+    { 0x1C, 0x36, 0x63, 0x63, 0x63, 0x36, 0x1C, 0x00},   // U+004F (O)
+    { 0x3F, 0x66, 0x66, 0x3E, 0x06, 0x06, 0x0F, 0x00},   // U+0050 (P)
+    { 0x1E, 0x33, 0x33, 0x33, 0x3B, 0x1E, 0x38, 0x00},   // U+0051 (Q)
+    { 0x3F, 0x66, 0x66, 0x3E, 0x36, 0x66, 0x67, 0x00},   // U+0052 (R)
+    { 0x1E, 0x33, 0x07, 0x0E, 0x38, 0x33, 0x1E, 0x00},   // U+0053 (S)
+    { 0x3F, 0x2D, 0x0C, 0x0C, 0x0C, 0x0C, 0x1E, 0x00},   // U+0054 (T)
+    { 0x33, 0x33, 0x33, 0x33, 0x33, 0x33, 0x3F, 0x00},   // U+0055 (U)
+    { 0x33, 0x33, 0x33, 0x33, 0x33, 0x1E, 0x0C, 0x00},   // U+0056 (V)
+    { 0x63, 0x63, 0x63, 0x6B, 0x7F, 0x77, 0x63, 0x00},   // U+0057 (W)
+    { 0x63, 0x63, 0x36, 0x1C, 0x1C, 0x36, 0x63, 0x00},   // U+0058 (X)
+    { 0x33, 0x33, 0x33, 0x1E, 0x0C, 0x0C, 0x1E, 0x00},   // U+0059 (Y)
+    { 0x7F, 0x63, 0x31, 0x18, 0x4C, 0x66, 0x7F, 0x00},   // U+005A (Z)
+    { 0x1E, 0x06, 0x06, 0x06, 0x06, 0x06, 0x1E, 0x00},   // U+005B ([)
+    { 0x03, 0x06, 0x0C, 0x18, 0x30, 0x60, 0x40, 0x00},   // U+005C (\)
+    { 0x1E, 0x18, 0x18, 0x18, 0x18, 0x18, 0x1E, 0x00},   // U+005D (])
+    { 0x08, 0x1C, 0x36, 0x63, 0x00, 0x00, 0x00, 0x00},   // U+005E (^)
+    { 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0xFF},   // U+005F (_)
+    { 0x0C, 0x0C, 0x18, 0x00, 0x00, 0x00, 0x00, 0x00},   // U+0060 (`)
+    { 0x00, 0x00, 0x1E, 0x30, 0x3E, 0x33, 0x6E, 0x00},   // U+0061 (a)
+    { 0x07, 0x06, 0x06, 0x3E, 0x66, 0x66, 0x3B, 0x00},   // U+0062 (b)
+    { 0x00, 0x00, 0x1E, 0x33, 0x03, 0x33, 0x1E, 0x00},   // U+0063 (c)
+    { 0x38, 0x30, 0x30, 0x3e, 0x33, 0x33, 0x6E, 0x00},   // U+0064 (d)
+    { 0x00, 0x00, 0x1E, 0x33, 0x3f, 0x03, 0x1E, 0x00},   // U+0065 (e)
+    { 0x1C, 0x36, 0x06, 0x0f, 0x06, 0x06, 0x0F, 0x00},   // U+0066 (f)
+    { 0x00, 0x00, 0x6E, 0x33, 0x33, 0x3E, 0x30, 0x1F},   // U+0067 (g)
+    { 0x07, 0x06, 0x36, 0x6E, 0x66, 0x66, 0x67, 0x00},   // U+0068 (h)
+    { 0x0C, 0x00, 0x0E, 0x0C, 0x0C, 0x0C, 0x1E, 0x00},   // U+0069 (i)
+    { 0x30, 0x00, 0x30, 0x30, 0x30, 0x33, 0x33, 0x1E},   // U+006A (j)
+    { 0x07, 0x06, 0x66, 0x36, 0x1E, 0x36, 0x67, 0x00},   // U+006B (k)
+    { 0x0E, 0x0C, 0x0C, 0x0C, 0x0C, 0x0C, 0x1E, 0x00},   // U+006C (l)
+    { 0x00, 0x00, 0x33, 0x7F, 0x7F, 0x6B, 0x63, 0x00},   // U+006D (m)
+    { 0x00, 0x00, 0x1F, 0x33, 0x33, 0x33, 0x33, 0x00},   // U+006E (n)
+    { 0x00, 0x00, 0x1E, 0x33, 0x33, 0x33, 0x1E, 0x00},   // U+006F (o)
+    { 0x00, 0x00, 0x3B, 0x66, 0x66, 0x3E, 0x06, 0x0F},   // U+0070 (p)
+    { 0x00, 0x00, 0x6E, 0x33, 0x33, 0x3E, 0x30, 0x78},   // U+0071 (q)
+    { 0x00, 0x00, 0x3B, 0x6E, 0x66, 0x06, 0x0F, 0x00},   // U+0072 (r)
+    { 0x00, 0x00, 0x3E, 0x03, 0x1E, 0x30, 0x1F, 0x00},   // U+0073 (s)
+    { 0x08, 0x0C, 0x3E, 0x0C, 0x0C, 0x2C, 0x18, 0x00},   // U+0074 (t)
+    { 0x00, 0x00, 0x33, 0x33, 0x33, 0x33, 0x6E, 0x00},   // U+0075 (u)
+    { 0x00, 0x00, 0x33, 0x33, 0x33, 0x1E, 0x0C, 0x00},   // U+0076 (v)
+    { 0x00, 0x00, 0x63, 0x6B, 0x7F, 0x7F, 0x36, 0x00},   // U+0077 (w)
+    { 0x00, 0x00, 0x63, 0x36, 0x1C, 0x36, 0x63, 0x00},   // U+0078 (x)
+    { 0x00, 0x00, 0x33, 0x33, 0x33, 0x3E, 0x30, 0x1F},   // U+0079 (y)
+    { 0x00, 0x00, 0x3F, 0x19, 0x0C, 0x26, 0x3F, 0x00},   // U+007A (z)
+    { 0x38, 0x0C, 0x0C, 0x07, 0x0C, 0x0C, 0x38, 0x00},   // U+007B ({)
+    { 0x18, 0x18, 0x18, 0x00, 0x18, 0x18, 0x18, 0x00},   // U+007C (|)
+    { 0x07, 0x0C, 0x0C, 0x38, 0x0C, 0x0C, 0x07, 0x00},   // U+007D (})
+    { 0x6E, 0x3B, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00},   // U+007E (~)
+    { 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00}    // U+007F
+};
@@ -0,0 +1,52 @@
+/*
+** $Id: lapi.h $
+** Auxiliary functions from Lua API
+** See Copyright Notice in lua.h
+*/
+
+#ifndef lapi_h
+#define lapi_h
+
+
+#include "llimits.h"
+#include "lstate.h"
+
+
+/* Increments 'L->top.p', checking for stack overflows */
+#define api_incr_top(L)	{L->top.p++; \
+			 api_check(L, L->top.p <= L->ci->top.p, \
+					"stack overflow");}
+
+
+/*
+** If a call returns too many multiple returns, the callee may not have
+** stack space to accommodate all results. In this case, this macro
+** increases its stack space ('L->ci->top.p').
+*/
+#define adjustresults(L,nres) \
+    { if ((nres) <= LUA_MULTRET && L->ci->top.p < L->top.p) \
+	L->ci->top.p = L->top.p; }
+
+
+/* Ensure the stack has at least 'n' elements */
+#define api_checknelems(L,n) \
+	api_check(L, (n) < (L->top.p - L->ci->func.p), \
+			  "not enough elements in the stack")
+
+
+/*
+** To reduce the overhead of returning from C functions, the presence of
+** to-be-closed variables in these functions is coded in the CallInfo's
+** field 'nresults', in a way that functions with no to-be-closed variables
+** with zero, one, or "all" wanted results have no overhead. Functions
+** with other number of wanted results, as well as functions with
+** variables to be closed, have an extra check.
+*/
+
+#define hastocloseCfunc(n)	((n) < LUA_MULTRET)
+
+/* Map [-1, inf) (range of 'nresults') into (-inf, -2] */
+#define codeNresults(n)		(-(n) - 3)
+#define decodeNresults(n)	(-(n) - 3)
+
+#endif
@@ -0,0 +1,301 @@
+/*
+** $Id: lauxlib.h $
+** Auxiliary functions for building Lua libraries
+** See Copyright Notice in lua.h
+*/
+
+
+#ifndef lauxlib_h
+#define lauxlib_h
+
+
+#include <stddef.h>
+#include <stdio.h>
+
+#include "luaconf.h"
+#include "lua.h"
+
+
+/* global table */
+#define LUA_GNAME	"_G"
+
+
+typedef struct luaL_Buffer luaL_Buffer;
+
+
+/* extra error code for 'luaL_loadfilex' */
+#define LUA_ERRFILE     (LUA_ERRERR+1)
+
+
+/* key, in the registry, for table of loaded modules */
+#define LUA_LOADED_TABLE	"_LOADED"
+
+
+/* key, in the registry, for table of preloaded loaders */
+#define LUA_PRELOAD_TABLE	"_PRELOAD"
+
+
+typedef struct luaL_Reg {
+  const char *name;
+  lua_CFunction func;
+} luaL_Reg;
+
+
+#define LUAL_NUMSIZES	(sizeof(lua_Integer)*16 + sizeof(lua_Number))
+
+LUALIB_API void (luaL_checkversion_) (lua_State *L, lua_Number ver, size_t sz);
+#define luaL_checkversion(L)  \
+	  luaL_checkversion_(L, LUA_VERSION_NUM, LUAL_NUMSIZES)
+
+LUALIB_API int (luaL_getmetafield) (lua_State *L, int obj, const char *e);
+LUALIB_API int (luaL_callmeta) (lua_State *L, int obj, const char *e);
+LUALIB_API const char *(luaL_tolstring) (lua_State *L, int idx, size_t *len);
+LUALIB_API int (luaL_argerror) (lua_State *L, int arg, const char *extramsg);
+LUALIB_API int (luaL_typeerror) (lua_State *L, int arg, const char *tname);
+LUALIB_API const char *(luaL_checklstring) (lua_State *L, int arg,
+                                                          size_t *l);
+LUALIB_API const char *(luaL_optlstring) (lua_State *L, int arg,
+                                          const char *def, size_t *l);
+LUALIB_API lua_Number (luaL_checknumber) (lua_State *L, int arg);
+LUALIB_API lua_Number (luaL_optnumber) (lua_State *L, int arg, lua_Number def);
+
+LUALIB_API lua_Integer (luaL_checkinteger) (lua_State *L, int arg);
+LUALIB_API lua_Integer (luaL_optinteger) (lua_State *L, int arg,
+                                          lua_Integer def);
+
+LUALIB_API void (luaL_checkstack) (lua_State *L, int sz, const char *msg);
+LUALIB_API void (luaL_checktype) (lua_State *L, int arg, int t);
+LUALIB_API void (luaL_checkany) (lua_State *L, int arg);
+
+LUALIB_API int   (luaL_newmetatable) (lua_State *L, const char *tname);
+LUALIB_API void  (luaL_setmetatable) (lua_State *L, const char *tname);
+LUALIB_API void *(luaL_testudata) (lua_State *L, int ud, const char *tname);
+LUALIB_API void *(luaL_checkudata) (lua_State *L, int ud, const char *tname);
+
+LUALIB_API void (luaL_where) (lua_State *L, int lvl);
+LUALIB_API int (luaL_error) (lua_State *L, const char *fmt, ...);
+
+LUALIB_API int (luaL_checkoption) (lua_State *L, int arg, const char *def,
+                                   const char *const lst[]);
+
+LUALIB_API int (luaL_fileresult) (lua_State *L, int stat, const char *fname);
+LUALIB_API int (luaL_execresult) (lua_State *L, int stat);
+
+
+/* predefined references */
+#define LUA_NOREF       (-2)
+#define LUA_REFNIL      (-1)
+
+LUALIB_API int (luaL_ref) (lua_State *L, int t);
+LUALIB_API void (luaL_unref) (lua_State *L, int t, int ref);
+
+LUALIB_API int (luaL_loadfilex) (lua_State *L, const char *filename,
+                                               const char *mode);
+
+#define luaL_loadfile(L,f)	luaL_loadfilex(L,f,NULL)
+
+LUALIB_API int (luaL_loadbufferx) (lua_State *L, const char *buff, size_t sz,
+                                   const char *name, const char *mode);
+LUALIB_API int (luaL_loadstring) (lua_State *L, const char *s);
+
+LUALIB_API lua_State *(luaL_newstate) (void);
+
+LUALIB_API lua_Integer (luaL_len) (lua_State *L, int idx);
+
+LUALIB_API void (luaL_addgsub) (luaL_Buffer *b, const char *s,
+                                     const char *p, const char *r);
+LUALIB_API const char *(luaL_gsub) (lua_State *L, const char *s,
+                                    const char *p, const char *r);
+
+LUALIB_API void (luaL_setfuncs) (lua_State *L, const luaL_Reg *l, int nup);
+
+LUALIB_API int (luaL_getsubtable) (lua_State *L, int idx, const char *fname);
+
+LUALIB_API void (luaL_traceback) (lua_State *L, lua_State *L1,
+                                  const char *msg, int level);
+
+LUALIB_API void (luaL_requiref) (lua_State *L, const char *modname,
+                                 lua_CFunction openf, int glb);
+
+/*
+** ===============================================================
+** some useful macros
+** ===============================================================
+*/
+
+
+#define luaL_newlibtable(L,l)	\
+  lua_createtable(L, 0, sizeof(l)/sizeof((l)[0]) - 1)
+
+#define luaL_newlib(L,l)  \
+  (luaL_checkversion(L), luaL_newlibtable(L,l), luaL_setfuncs(L,l,0))
+
+#define luaL_argcheck(L, cond,arg,extramsg)	\
+	((void)(luai_likely(cond) || luaL_argerror(L, (arg), (extramsg))))
+
+#define luaL_argexpected(L,cond,arg,tname)	\
+	((void)(luai_likely(cond) || luaL_typeerror(L, (arg), (tname))))
+
+#define luaL_checkstring(L,n)	(luaL_checklstring(L, (n), NULL))
+#define luaL_optstring(L,n,d)	(luaL_optlstring(L, (n), (d), NULL))
+
+#define luaL_typename(L,i)	lua_typename(L, lua_type(L,(i)))
+
+#define luaL_dofile(L, fn) \
+	(luaL_loadfile(L, fn) || lua_pcall(L, 0, LUA_MULTRET, 0))
+
+#define luaL_dostring(L, s) \
+	(luaL_loadstring(L, s) || lua_pcall(L, 0, LUA_MULTRET, 0))
+
+#define luaL_getmetatable(L,n)	(lua_getfield(L, LUA_REGISTRYINDEX, (n)))
+
+#define luaL_opt(L,f,n,d)	(lua_isnoneornil(L,(n)) ? (d) : f(L,(n)))
+
+#define luaL_loadbuffer(L,s,sz,n)	luaL_loadbufferx(L,s,sz,n,NULL)
+
+
+/*
+** Perform arithmetic operations on lua_Integer values with wrap-around
+** semantics, as the Lua core does.
+*/
+#define luaL_intop(op,v1,v2)  \
+	((lua_Integer)((lua_Unsigned)(v1) op (lua_Unsigned)(v2)))
+
+
+/* push the value used to represent failure/error */
+#define luaL_pushfail(L)	lua_pushnil(L)
+
+
+/*
+** Internal assertions for in-house debugging
+*/
+#if !defined(lua_assert)
+
+#if defined LUAI_ASSERT
+  #include <assert.h>
+  #define lua_assert(c)		assert(c)
+#else
+  #define lua_assert(c)		((void)0)
+#endif
+
+#endif
+
+
+
+/*
+** {======================================================
+** Generic Buffer manipulation
+** =======================================================
+*/
+
+struct luaL_Buffer {
+  char *b;  /* buffer address */
+  size_t size;  /* buffer size */
+  size_t n;  /* number of characters in buffer */
+  lua_State *L;
+  union {
+    LUAI_MAXALIGN;  /* ensure maximum alignment for buffer */
+    char b[LUAL_BUFFERSIZE];  /* initial buffer */
+  } init;
+};
+
+
+#define luaL_bufflen(bf)	((bf)->n)
+#define luaL_buffaddr(bf)	((bf)->b)
+
+
+#define luaL_addchar(B,c) \
+  ((void)((B)->n < (B)->size || luaL_prepbuffsize((B), 1)), \
+   ((B)->b[(B)->n++] = (c)))
+
+#define luaL_addsize(B,s)	((B)->n += (s))
+
+#define luaL_buffsub(B,s)	((B)->n -= (s))
+
+LUALIB_API void (luaL_buffinit) (lua_State *L, luaL_Buffer *B);
+LUALIB_API char *(luaL_prepbuffsize) (luaL_Buffer *B, size_t sz);
+LUALIB_API void (luaL_addlstring) (luaL_Buffer *B, const char *s, size_t l);
+LUALIB_API void (luaL_addstring) (luaL_Buffer *B, const char *s);
+LUALIB_API void (luaL_addvalue) (luaL_Buffer *B);
+LUALIB_API void (luaL_pushresult) (luaL_Buffer *B);
+LUALIB_API void (luaL_pushresultsize) (luaL_Buffer *B, size_t sz);
+LUALIB_API char *(luaL_buffinitsize) (lua_State *L, luaL_Buffer *B, size_t sz);
+
+#define luaL_prepbuffer(B)	luaL_prepbuffsize(B, LUAL_BUFFERSIZE)
+
+/* }====================================================== */
+
+
+
+/*
+** {======================================================
+** File handles for IO library
+** =======================================================
+*/
+
+/*
+** A file handle is a userdata with metatable 'LUA_FILEHANDLE' and
+** initial structure 'luaL_Stream' (it may contain other fields
+** after that initial structure).
+*/
+
+#define LUA_FILEHANDLE          "FILE*"
+
+
+typedef struct luaL_Stream {
+  FILE *f;  /* stream (NULL for incompletely created streams) */
+  lua_CFunction closef;  /* to close stream (NULL for closed streams) */
+} luaL_Stream;
+
+/* }====================================================== */
+
+/*
+** {==================================================================
+** "Abstraction Layer" for basic report of messages and errors
+** ===================================================================
+*/
+
+/* print a string */
+#if !defined(lua_writestring)
+#define lua_writestring(s,l)   fwrite((s), sizeof(char), (l), stdout)
+#endif
+
+/* print a newline and flush the output */
+#if !defined(lua_writeline)
+#define lua_writeline()        (lua_writestring("\n", 1), fflush(stdout))
+#endif
+
+/* print an error message */
+#if !defined(lua_writestringerror)
+#define lua_writestringerror(s,p) \
+        (fprintf(stderr, (s), (p)), fflush(stderr))
+#endif
+
+/* }================================================================== */
+
+
+/*
+** {============================================================
+** Compatibility with deprecated conversions
+** =============================================================
+*/
+#if defined(LUA_COMPAT_APIINTCASTS)
+
+#define luaL_checkunsigned(L,a)	((lua_Unsigned)luaL_checkinteger(L,a))
+#define luaL_optunsigned(L,a,d)	\
+	((lua_Unsigned)luaL_optinteger(L,a,(lua_Integer)(d)))
+
+#define luaL_checkint(L,n)	((int)luaL_checkinteger(L, (n)))
+#define luaL_optint(L,n,d)	((int)luaL_optinteger(L, (n), (d)))
+
+#define luaL_checklong(L,n)	((long)luaL_checkinteger(L, (n)))
+#define luaL_optlong(L,n,d)	((long)luaL_optinteger(L, (n), (d)))
+
+#endif
+/* }============================================================ */
+
+
+
+#endif
+
+
@@ -0,0 +1,549 @@
+/*
+** $Id: lbaselib.c $
+** Basic library
+** See Copyright Notice in lua.h
+*/
+
+#define lbaselib_c
+#define LUA_LIB
+
+#include "lprefix.h"
+
+
+#include <ctype.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+#include "lua.h"
+
+#include "lauxlib.h"
+#include "lualib.h"
+
+
+static int luaB_print (lua_State *L) {
+  int n = lua_gettop(L);  /* number of arguments */
+  int i;
+  for (i = 1; i <= n; i++) {  /* for each argument */
+    size_t l;
+    const char *s = luaL_tolstring(L, i, &l);  /* convert it to string */
+    if (i > 1)  /* not the first element? */
+      lua_writestring("\t", 1);  /* add a tab before it */
+    lua_writestring(s, l);  /* print it */
+    lua_pop(L, 1);  /* pop result */
+  }
+  lua_writeline();
+  return 0;
+}
+
+
+/*
+** Creates a warning with all given arguments.
+** Check first for errors; otherwise an error may interrupt
+** the composition of a warning, leaving it unfinished.
+*/
+static int luaB_warn (lua_State *L) {
+  int n = lua_gettop(L);  /* number of arguments */
+  int i;
+  luaL_checkstring(L, 1);  /* at least one argument */
+  for (i = 2; i <= n; i++)
+    luaL_checkstring(L, i);  /* make sure all arguments are strings */
+  for (i = 1; i < n; i++)  /* compose warning */
+    lua_warning(L, lua_tostring(L, i), 1);
+  lua_warning(L, lua_tostring(L, n), 0);  /* close warning */
+  return 0;
+}
+
+
+#define SPACECHARS	" \f\n\r\t\v"
+
+static const char *b_str2int (const char *s, int base, lua_Integer *pn) {
+  lua_Unsigned n = 0;
+  int neg = 0;
+  s += strspn(s, SPACECHARS);  /* skip initial spaces */
+  if (*s == '-') { s++; neg = 1; }  /* handle sign */
+  else if (*s == '+') s++;
+  if (!isalnum((unsigned char)*s))  /* no digit? */
+    return NULL;
+  do {
+    int digit = (isdigit((unsigned char)*s)) ? *s - '0'
+                   : (toupper((unsigned char)*s) - 'A') + 10;
+    if (digit >= base) return NULL;  /* invalid numeral */
+    n = n * base + digit;
+    s++;
+  } while (isalnum((unsigned char)*s));
+  s += strspn(s, SPACECHARS);  /* skip trailing spaces */
+  *pn = (lua_Integer)((neg) ? (0u - n) : n);
+  return s;
+}
+
+
+static int luaB_tonumber (lua_State *L) {
+  if (lua_isnoneornil(L, 2)) {  /* standard conversion? */
+    if (lua_type(L, 1) == LUA_TNUMBER) {  /* already a number? */
+      lua_settop(L, 1);  /* yes; return it */
+      return 1;
+    }
+    else {
+      size_t l;
+      const char *s = lua_tolstring(L, 1, &l);
+      if (s != NULL && lua_stringtonumber(L, s) == l + 1)
+        return 1;  /* successful conversion to number */
+      /* else not a number */
+      luaL_checkany(L, 1);  /* (but there must be some parameter) */
+    }
+  }
+  else {
+    size_t l;
+    const char *s;
+    lua_Integer n = 0;  /* to avoid warnings */
+    lua_Integer base = luaL_checkinteger(L, 2);
+    luaL_checktype(L, 1, LUA_TSTRING);  /* no numbers as strings */
+    s = lua_tolstring(L, 1, &l);
+    luaL_argcheck(L, 2 <= base && base <= 36, 2, "base out of range");
+    if (b_str2int(s, (int)base, &n) == s + l) {
+      lua_pushinteger(L, n);
+      return 1;
+    }  /* else not a number */
+  }  /* else not a number */
+  luaL_pushfail(L);  /* not a number */
+  return 1;
+}
+
+
+static int luaB_error (lua_State *L) {
+  int level = (int)luaL_optinteger(L, 2, 1);
+  lua_settop(L, 1);
+  if (lua_type(L, 1) == LUA_TSTRING && level > 0) {
+    luaL_where(L, level);   /* add extra information */
+    lua_pushvalue(L, 1);
+    lua_concat(L, 2);
+  }
+  return lua_error(L);
+}
+
+
+static int luaB_getmetatable (lua_State *L) {
+  luaL_checkany(L, 1);
+  if (!lua_getmetatable(L, 1)) {
+    lua_pushnil(L);
+    return 1;  /* no metatable */
+  }
+  luaL_getmetafield(L, 1, "__metatable");
+  return 1;  /* returns either __metatable field (if present) or metatable */
+}
+
+
+static int luaB_setmetatable (lua_State *L) {
+  int t = lua_type(L, 2);
+  luaL_checktype(L, 1, LUA_TTABLE);
+  luaL_argexpected(L, t == LUA_TNIL || t == LUA_TTABLE, 2, "nil or table");
+  if (l_unlikely(luaL_getmetafield(L, 1, "__metatable") != LUA_TNIL))
+    return luaL_error(L, "cannot change a protected metatable");
+  lua_settop(L, 2);
+  lua_setmetatable(L, 1);
+  return 1;
+}
+
+
+static int luaB_rawequal (lua_State *L) {
+  luaL_checkany(L, 1);
+  luaL_checkany(L, 2);
+  lua_pushboolean(L, lua_rawequal(L, 1, 2));
+  return 1;
+}
+
+
+static int luaB_rawlen (lua_State *L) {
+  int t = lua_type(L, 1);
+  luaL_argexpected(L, t == LUA_TTABLE || t == LUA_TSTRING, 1,
+                      "table or string");
+  lua_pushinteger(L, lua_rawlen(L, 1));
+  return 1;
+}
+
+
+static int luaB_rawget (lua_State *L) {
+  luaL_checktype(L, 1, LUA_TTABLE);
+  luaL_checkany(L, 2);
+  lua_settop(L, 2);
+  lua_rawget(L, 1);
+  return 1;
+}
+
+static int luaB_rawset (lua_State *L) {
+  luaL_checktype(L, 1, LUA_TTABLE);
+  luaL_checkany(L, 2);
+  luaL_checkany(L, 3);
+  lua_settop(L, 3);
+  lua_rawset(L, 1);
+  return 1;
+}
+
+
+static int pushmode (lua_State *L, int oldmode) {
+  if (oldmode == -1)
+    luaL_pushfail(L);  /* invalid call to 'lua_gc' */
+  else
+    lua_pushstring(L, (oldmode == LUA_GCINC) ? "incremental"
+                                             : "generational");
+  return 1;
+}
+
+
+/*
+** check whether call to 'lua_gc' was valid (not inside a finalizer)
+*/
+#define checkvalres(res) { if (res == -1) break; }
+
+static int luaB_collectgarbage (lua_State *L) {
+  static const char *const opts[] = {"stop", "restart", "collect",
+    "count", "step", "setpause", "setstepmul",
+    "isrunning", "generational", "incremental", NULL};
+  static const int optsnum[] = {LUA_GCSTOP, LUA_GCRESTART, LUA_GCCOLLECT,
+    LUA_GCCOUNT, LUA_GCSTEP, LUA_GCSETPAUSE, LUA_GCSETSTEPMUL,
+    LUA_GCISRUNNING, LUA_GCGEN, LUA_GCINC};
+  int o = optsnum[luaL_checkoption(L, 1, "collect", opts)];
+  switch (o) {
+    case LUA_GCCOUNT: {
+      int k = lua_gc(L, o);
+      int b = lua_gc(L, LUA_GCCOUNTB);
+      checkvalres(k);
+      lua_pushnumber(L, (lua_Number)k + ((lua_Number)b/1024));
+      return 1;
+    }
+    case LUA_GCSTEP: {
+      int step = (int)luaL_optinteger(L, 2, 0);
+      int res = lua_gc(L, o, step);
+      checkvalres(res);
+      lua_pushboolean(L, res);
+      return 1;
+    }
+    case LUA_GCSETPAUSE:
+    case LUA_GCSETSTEPMUL: {
+      int p = (int)luaL_optinteger(L, 2, 0);
+      int previous = lua_gc(L, o, p);
+      checkvalres(previous);
+      lua_pushinteger(L, previous);
+      return 1;
+    }
+    case LUA_GCISRUNNING: {
+      int res = lua_gc(L, o);
+      checkvalres(res);
+      lua_pushboolean(L, res);
+      return 1;
+    }
+    case LUA_GCGEN: {
+      int minormul = (int)luaL_optinteger(L, 2, 0);
+      int majormul = (int)luaL_optinteger(L, 3, 0);
+      return pushmode(L, lua_gc(L, o, minormul, majormul));
+    }
+    case LUA_GCINC: {
+      int pause = (int)luaL_optinteger(L, 2, 0);
+      int stepmul = (int)luaL_optinteger(L, 3, 0);
+      int stepsize = (int)luaL_optinteger(L, 4, 0);
+      return pushmode(L, lua_gc(L, o, pause, stepmul, stepsize));
+    }
+    default: {
+      int res = lua_gc(L, o);
+      checkvalres(res);
+      lua_pushinteger(L, res);
+      return 1;
+    }
+  }
+  luaL_pushfail(L);  /* invalid call (inside a finalizer) */
+  return 1;
+}
+
+
+static int luaB_type (lua_State *L) {
+  int t = lua_type(L, 1);
+  luaL_argcheck(L, t != LUA_TNONE, 1, "value expected");
+  lua_pushstring(L, lua_typename(L, t));
+  return 1;
+}
+
+
+static int luaB_next (lua_State *L) {
+  luaL_checktype(L, 1, LUA_TTABLE);
+  lua_settop(L, 2);  /* create a 2nd argument if there isn't one */
+  if (lua_next(L, 1))
+    return 2;
+  else {
+    lua_pushnil(L);
+    return 1;
+  }
+}
+
+
+static int pairscont (lua_State *L, int status, lua_KContext k) {
+  (void)L; (void)status; (void)k;  /* unused */
+  return 3;
+}
+
+static int luaB_pairs (lua_State *L) {
+  luaL_checkany(L, 1);
+  if (luaL_getmetafield(L, 1, "__pairs") == LUA_TNIL) {  /* no metamethod? */
+    lua_pushcfunction(L, luaB_next);  /* will return generator, */
+    lua_pushvalue(L, 1);  /* state, */
+    lua_pushnil(L);  /* and initial value */
+  }
+  else {
+    lua_pushvalue(L, 1);  /* argument 'self' to metamethod */
+    lua_callk(L, 1, 3, 0, pairscont);  /* get 3 values from metamethod */
+  }
+  return 3;
+}
+
+
+/*
+** Traversal function for 'ipairs'
+*/
+static int ipairsaux (lua_State *L) {
+  lua_Integer i = luaL_checkinteger(L, 2);
+  i = luaL_intop(+, i, 1);
+  lua_pushinteger(L, i);
+  return (lua_geti(L, 1, i) == LUA_TNIL) ? 1 : 2;
+}
+
+
+/*
+** 'ipairs' function. Returns 'ipairsaux', given "table", 0.
+** (The given "table" may not be a table.)
+*/
+static int luaB_ipairs (lua_State *L) {
+  luaL_checkany(L, 1);
+  lua_pushcfunction(L, ipairsaux);  /* iteration function */
+  lua_pushvalue(L, 1);  /* state */
+  lua_pushinteger(L, 0);  /* initial value */
+  return 3;
+}
+
+
+static int load_aux (lua_State *L, int status, int envidx) {
+  if (l_likely(status == LUA_OK)) {
+    if (envidx != 0) {  /* 'env' parameter? */
+      lua_pushvalue(L, envidx);  /* environment for loaded function */
+      if (!lua_setupvalue(L, -2, 1))  /* set it as 1st upvalue */
+        lua_pop(L, 1);  /* remove 'env' if not used by previous call */
+    }
+    return 1;
+  }
+  else {  /* error (message is on top of the stack) */
+    luaL_pushfail(L);
+    lua_insert(L, -2);  /* put before error message */
+    return 2;  /* return fail plus error message */
+  }
+}
+
+
+static int luaB_loadfile (lua_State *L) {
+  const char *fname = luaL_optstring(L, 1, NULL);
+  const char *mode = luaL_optstring(L, 2, NULL);
+  int env = (!lua_isnone(L, 3) ? 3 : 0);  /* 'env' index or 0 if no 'env' */
+  int status = luaL_loadfilex(L, fname, mode);
+  return load_aux(L, status, env);
+}
+
+
+/*
+** {======================================================
+** Generic Read function
+** =======================================================
+*/
+
+
+/*
+** reserved slot, above all arguments, to hold a copy of the returned
+** string to avoid it being collected while parsed. 'load' has four
+** optional arguments (chunk, source name, mode, and environment).
+*/
+#define RESERVEDSLOT	5
+
+
+/*
+** Reader for generic 'load' function: 'lua_load' uses the
+** stack for internal stuff, so the reader cannot change the
+** stack top. Instead, it keeps its resulting string in a
+** reserved slot inside the stack.
+*/
+static const char *generic_reader (lua_State *L, void *ud, size_t *size) {
+  (void)(ud);  /* not used */
+  luaL_checkstack(L, 2, "too many nested functions");
+  lua_pushvalue(L, 1);  /* get function */
+  lua_call(L, 0, 1);  /* call it */
+  if (lua_isnil(L, -1)) {
+    lua_pop(L, 1);  /* pop result */
+    *size = 0;
+    return NULL;
+  }
+  else if (l_unlikely(!lua_isstring(L, -1)))
+    luaL_error(L, "reader function must return a string");
+  lua_replace(L, RESERVEDSLOT);  /* save string in reserved slot */
+  return lua_tolstring(L, RESERVEDSLOT, size);
+}
+
+
+static int luaB_load (lua_State *L) {
+  int status;
+  size_t l;
+  const char *s = lua_tolstring(L, 1, &l);
+  const char *mode = luaL_optstring(L, 3, "bt");
+  int env = (!lua_isnone(L, 4) ? 4 : 0);  /* 'env' index or 0 if no 'env' */
+  if (s != NULL) {  /* loading a string? */
+    const char *chunkname = luaL_optstring(L, 2, s);
+    status = luaL_loadbufferx(L, s, l, chunkname, mode);
+  }
+  else {  /* loading from a reader function */
+    const char *chunkname = luaL_optstring(L, 2, "=(load)");
+    luaL_checktype(L, 1, LUA_TFUNCTION);
+    lua_settop(L, RESERVEDSLOT);  /* create reserved slot */
+    status = lua_load(L, generic_reader, NULL, chunkname, mode);
+  }
+  return load_aux(L, status, env);
+}
+
+/* }====================================================== */
+
+
+static int dofilecont (lua_State *L, int d1, lua_KContext d2) {
+  (void)d1;  (void)d2;  /* only to match 'lua_Kfunction' prototype */
+  return lua_gettop(L) - 1;
+}
+
+
+static int luaB_dofile (lua_State *L) {
+  const char *fname = luaL_optstring(L, 1, NULL);
+  lua_settop(L, 1);
+  if (l_unlikely(luaL_loadfile(L, fname) != LUA_OK))
+    return lua_error(L);
+  lua_callk(L, 0, LUA_MULTRET, 0, dofilecont);
+  return dofilecont(L, 0, 0);
+}
+
+
+static int luaB_assert (lua_State *L) {
+  if (l_likely(lua_toboolean(L, 1)))  /* condition is true? */
+    return lua_gettop(L);  /* return all arguments */
+  else {  /* error */
+    luaL_checkany(L, 1);  /* there must be a condition */
+    lua_remove(L, 1);  /* remove it */
+    lua_pushliteral(L, "assertion failed!");  /* default message */
+    lua_settop(L, 1);  /* leave only message (default if no other one) */
+    return luaB_error(L);  /* call 'error' */
+  }
+}
+
+
+static int luaB_select (lua_State *L) {
+  int n = lua_gettop(L);
+  if (lua_type(L, 1) == LUA_TSTRING && *lua_tostring(L, 1) == '#') {
+    lua_pushinteger(L, n-1);
+    return 1;
+  }
+  else {
+    lua_Integer i = luaL_checkinteger(L, 1);
+    if (i < 0) i = n + i;
+    else if (i > n) i = n;
+    luaL_argcheck(L, 1 <= i, 1, "index out of range");
+    return n - (int)i;
+  }
+}
+
+
+/*
+** Continuation function for 'pcall' and 'xpcall'. Both functions
+** already pushed a 'true' before doing the call, so in case of success
+** 'finishpcall' only has to return everything in the stack minus
+** 'extra' values (where 'extra' is exactly the number of items to be
+** ignored).
+*/
+static int finishpcall (lua_State *L, int status, lua_KContext extra) {
+  if (l_unlikely(status != LUA_OK && status != LUA_YIELD)) {  /* error? */
+    lua_pushboolean(L, 0);  /* first result (false) */
+    lua_pushvalue(L, -2);  /* error message */
+    return 2;  /* return false, msg */
+  }
+  else
+    return lua_gettop(L) - (int)extra;  /* return all results */
+}
+
+
+static int luaB_pcall (lua_State *L) {
+  int status;
+  luaL_checkany(L, 1);
+  lua_pushboolean(L, 1);  /* first result if no errors */
+  lua_insert(L, 1);  /* put it in place */
+  status = lua_pcallk(L, lua_gettop(L) - 2, LUA_MULTRET, 0, 0, finishpcall);
+  return finishpcall(L, status, 0);
+}
+
+
+/*
+** Do a protected call with error handling. After 'lua_rotate', the
+** stack will have <f, err, true, f, [args...]>; so, the function passes
+** 2 to 'finishpcall' to skip the 2 first values when returning results.
+*/
+static int luaB_xpcall (lua_State *L) {
+  int status;
+  int n = lua_gettop(L);
+  luaL_checktype(L, 2, LUA_TFUNCTION);  /* check error function */
+  lua_pushboolean(L, 1);  /* first result */
+  lua_pushvalue(L, 1);  /* function */
+  lua_rotate(L, 3, 2);  /* move them below function's arguments */
+  status = lua_pcallk(L, n - 2, LUA_MULTRET, 2, 2, finishpcall);
+  return finishpcall(L, status, 2);
+}
+
+
+static int luaB_tostring (lua_State *L) {
+  luaL_checkany(L, 1);
+  luaL_tolstring(L, 1, NULL);
+  return 1;
+}
+
+
+static const luaL_Reg base_funcs[] = {
+  {"assert", luaB_assert},
+  {"collectgarbage", luaB_collectgarbage},
+  {"dofile", luaB_dofile},
+  {"error", luaB_error},
+  {"getmetatable", luaB_getmetatable},
+  {"ipairs", luaB_ipairs},
+  {"loadfile", luaB_loadfile},
+  {"load", luaB_load},
+  {"next", luaB_next},
+  {"pairs", luaB_pairs},
+  {"pcall", luaB_pcall},
+  {"print", luaB_print},
+  {"warn", luaB_warn},
+  {"rawequal", luaB_rawequal},
+  {"rawlen", luaB_rawlen},
+  {"rawget", luaB_rawget},
+  {"rawset", luaB_rawset},
+  {"select", luaB_select},
+  {"setmetatable", luaB_setmetatable},
+  {"tonumber", luaB_tonumber},
+  {"tostring", luaB_tostring},
+  {"type", luaB_type},
+  {"xpcall", luaB_xpcall},
+  /* placeholders */
+  {LUA_GNAME, NULL},
+  {"_VERSION", NULL},
+  {NULL, NULL}
+};
+
+
+LUAMOD_API int luaopen_base (lua_State *L) {
+  /* open lib into global table */
+  lua_pushglobaltable(L);
+  luaL_setfuncs(L, base_funcs, 0);
+  /* set global _G */
+  lua_pushvalue(L, -1);
+  lua_setfield(L, -2, LUA_GNAME);
+  /* set global _VERSION */
+  lua_pushliteral(L, LUA_VERSION);
+  lua_setfield(L, -2, "_VERSION");
+  return 1;
+}
+
@@ -0,0 +1,101 @@
+/*
+** $Id: lcode.h $
+** Code generator for Lua
+** See Copyright Notice in lua.h
+*/
+
+#ifndef lcode_h
+#define lcode_h
+
+#include "llex.h"
+#include "lobject.h"
+#include "lopcodes.h"
+#include "lparser.h"
+
+
+/*
+** Marks the end of a patch list. It is an invalid value both as an absolute
+** address, and as a list link (would link an element to itself).
+*/
+#define NO_JUMP (-1)
+
+
+/*
+** grep "ORDER OPR" if you change these enums  (ORDER OP)
+*/
+typedef enum BinOpr {
+  /* arithmetic operators */
+  OPR_ADD, OPR_SUB, OPR_MUL, OPR_MOD, OPR_POW,
+  OPR_DIV, OPR_IDIV,
+  /* bitwise operators */
+  OPR_BAND, OPR_BOR, OPR_BXOR,
+  OPR_SHL, OPR_SHR,
+  /* string operator */
+  OPR_CONCAT,
+  /* comparison operators */
+  OPR_EQ, OPR_LT, OPR_LE,
+  OPR_NE, OPR_GT, OPR_GE,
+  /* logical operators */
+  OPR_AND, OPR_OR,
+  OPR_NOBINOPR
+} BinOpr;
+
+
+/* true if operation is foldable (that is, it is arithmetic or bitwise) */
+#define foldbinop(op)	((op) <= OPR_SHR)
+
+
+#define luaK_codeABC(fs,o,a,b,c)	luaK_codeABCk(fs,o,a,b,c,0)
+
+
+typedef enum UnOpr { OPR_MINUS, OPR_BNOT, OPR_NOT, OPR_LEN, OPR_NOUNOPR } UnOpr;
+
+
+/* get (pointer to) instruction of given 'expdesc' */
+#define getinstruction(fs,e)	((fs)->f->code[(e)->u.info])
+
+
+#define luaK_setmultret(fs,e)	luaK_setreturns(fs, e, LUA_MULTRET)
+
+#define luaK_jumpto(fs,t)	luaK_patchlist(fs, luaK_jump(fs), t)
+
+LUAI_FUNC int luaK_code (FuncState *fs, Instruction i);
+LUAI_FUNC int luaK_codeABx (FuncState *fs, OpCode o, int A, unsigned int Bx);
+LUAI_FUNC int luaK_codeABCk (FuncState *fs, OpCode o, int A,
+                                            int B, int C, int k);
+LUAI_FUNC int luaK_exp2const (FuncState *fs, const expdesc *e, TValue *v);
+LUAI_FUNC void luaK_fixline (FuncState *fs, int line);
+LUAI_FUNC void luaK_nil (FuncState *fs, int from, int n);
+LUAI_FUNC void luaK_reserveregs (FuncState *fs, int n);
+LUAI_FUNC void luaK_checkstack (FuncState *fs, int n);
+LUAI_FUNC void luaK_int (FuncState *fs, int reg, lua_Integer n);
+LUAI_FUNC void luaK_dischargevars (FuncState *fs, expdesc *e);
+LUAI_FUNC int luaK_exp2anyreg (FuncState *fs, expdesc *e);
+LUAI_FUNC void luaK_exp2anyregup (FuncState *fs, expdesc *e);
+LUAI_FUNC void luaK_exp2nextreg (FuncState *fs, expdesc *e);
+LUAI_FUNC void luaK_exp2val (FuncState *fs, expdesc *e);
+LUAI_FUNC void luaK_self (FuncState *fs, expdesc *e, expdesc *key);
+LUAI_FUNC void luaK_indexed (FuncState *fs, expdesc *t, expdesc *k);
+LUAI_FUNC void luaK_goiftrue (FuncState *fs, expdesc *e);
+LUAI_FUNC void luaK_goiffalse (FuncState *fs, expdesc *e);
+LUAI_FUNC void luaK_storevar (FuncState *fs, expdesc *var, expdesc *e);
+LUAI_FUNC void luaK_setreturns (FuncState *fs, expdesc *e, int nresults);
+LUAI_FUNC void luaK_setoneret (FuncState *fs, expdesc *e);
+LUAI_FUNC int luaK_jump (FuncState *fs);
+LUAI_FUNC void luaK_ret (FuncState *fs, int first, int nret);
+LUAI_FUNC void luaK_patchlist (FuncState *fs, int list, int target);
+LUAI_FUNC void luaK_patchtohere (FuncState *fs, int list);
+LUAI_FUNC void luaK_concat (FuncState *fs, int *l1, int l2);
+LUAI_FUNC int luaK_getlabel (FuncState *fs);
+LUAI_FUNC void luaK_prefix (FuncState *fs, UnOpr op, expdesc *v, int line);
+LUAI_FUNC void luaK_infix (FuncState *fs, BinOpr op, expdesc *v);
+LUAI_FUNC void luaK_posfix (FuncState *fs, BinOpr op, expdesc *v1,
+                            expdesc *v2, int line);
+LUAI_FUNC void luaK_settablesize (FuncState *fs, int pc,
+                                  int ra, int asize, int hsize);
+LUAI_FUNC void luaK_setlist (FuncState *fs, int base, int nelems, int tostore);
+LUAI_FUNC void luaK_finish (FuncState *fs);
+LUAI_FUNC l_noret luaK_semerror (LexState *ls, const char *msg);
+
+
+#endif
@@ -0,0 +1,210 @@
+/*
+** $Id: lcorolib.c $
+** Coroutine Library
+** See Copyright Notice in lua.h
+*/
+
+#define lcorolib_c
+#define LUA_LIB
+
+#include "lprefix.h"
+
+
+#include <stdlib.h>
+
+#include "lua.h"
+
+#include "lauxlib.h"
+#include "lualib.h"
+
+
+static lua_State *getco (lua_State *L) {
+  lua_State *co = lua_tothread(L, 1);
+  luaL_argexpected(L, co, 1, "thread");
+  return co;
+}
+
+
+/*
+** Resumes a coroutine. Returns the number of results for non-error
+** cases or -1 for errors.
+*/
+static int auxresume (lua_State *L, lua_State *co, int narg) {
+  int status, nres;
+  if (l_unlikely(!lua_checkstack(co, narg))) {
+    lua_pushliteral(L, "too many arguments to resume");
+    return -1;  /* error flag */
+  }
+  lua_xmove(L, co, narg);
+  status = lua_resume(co, L, narg, &nres);
+  if (l_likely(status == LUA_OK || status == LUA_YIELD)) {
+    if (l_unlikely(!lua_checkstack(L, nres + 1))) {
+      lua_pop(co, nres);  /* remove results anyway */
+      lua_pushliteral(L, "too many results to resume");
+      return -1;  /* error flag */
+    }
+    lua_xmove(co, L, nres);  /* move yielded values */
+    return nres;
+  }
+  else {
+    lua_xmove(co, L, 1);  /* move error message */
+    return -1;  /* error flag */
+  }
+}
+
+
+static int luaB_coresume (lua_State *L) {
+  lua_State *co = getco(L);
+  int r;
+  r = auxresume(L, co, lua_gettop(L) - 1);
+  if (l_unlikely(r < 0)) {
+    lua_pushboolean(L, 0);
+    lua_insert(L, -2);
+    return 2;  /* return false + error message */
+  }
+  else {
+    lua_pushboolean(L, 1);
+    lua_insert(L, -(r + 1));
+    return r + 1;  /* return true + 'resume' returns */
+  }
+}
+
+
+static int luaB_auxwrap (lua_State *L) {
+  lua_State *co = lua_tothread(L, lua_upvalueindex(1));
+  int r = auxresume(L, co, lua_gettop(L));
+  if (l_unlikely(r < 0)) {  /* error? */
+    int stat = lua_status(co);
+    if (stat != LUA_OK && stat != LUA_YIELD) {  /* error in the coroutine? */
+      stat = lua_closethread(co, L);  /* close its tbc variables */
+      lua_assert(stat != LUA_OK);
+      lua_xmove(co, L, 1);  /* move error message to the caller */
+    }
+    if (stat != LUA_ERRMEM &&  /* not a memory error and ... */
+        lua_type(L, -1) == LUA_TSTRING) {  /* ... error object is a string? */
+      luaL_where(L, 1);  /* add extra info, if available */
+      lua_insert(L, -2);
+      lua_concat(L, 2);
+    }
+    return lua_error(L);  /* propagate error */
+  }
+  return r;
+}
+
+
+static int luaB_cocreate (lua_State *L) {
+  lua_State *NL;
+  luaL_checktype(L, 1, LUA_TFUNCTION);
+  NL = lua_newthread(L);
+  lua_pushvalue(L, 1);  /* move function to top */
+  lua_xmove(L, NL, 1);  /* move function from L to NL */
+  return 1;
+}
+
+
+static int luaB_cowrap (lua_State *L) {
+  luaB_cocreate(L);
+  lua_pushcclosure(L, luaB_auxwrap, 1);
+  return 1;
+}
+
+
+static int luaB_yield (lua_State *L) {
+  return lua_yield(L, lua_gettop(L));
+}
+
+
+#define COS_RUN		0
+#define COS_DEAD	1
+#define COS_YIELD	2
+#define COS_NORM	3
+
+
+static const char *const statname[] =
+  {"running", "dead", "suspended", "normal"};
+
+
+static int auxstatus (lua_State *L, lua_State *co) {
+  if (L == co) return COS_RUN;
+  else {
+    switch (lua_status(co)) {
+      case LUA_YIELD:
+        return COS_YIELD;
+      case LUA_OK: {
+        lua_Debug ar;
+        if (lua_getstack(co, 0, &ar))  /* does it have frames? */
+          return COS_NORM;  /* it is running */
+        else if (lua_gettop(co) == 0)
+            return COS_DEAD;
+        else
+          return COS_YIELD;  /* initial state */
+      }
+      default:  /* some error occurred */
+        return COS_DEAD;
+    }
+  }
+}
+
+
+static int luaB_costatus (lua_State *L) {
+  lua_State *co = getco(L);
+  lua_pushstring(L, statname[auxstatus(L, co)]);
+  return 1;
+}
+
+
+static int luaB_yieldable (lua_State *L) {
+  lua_State *co = lua_isnone(L, 1) ? L : getco(L);
+  lua_pushboolean(L, lua_isyieldable(co));
+  return 1;
+}
+
+
+static int luaB_corunning (lua_State *L) {
+  int ismain = lua_pushthread(L);
+  lua_pushboolean(L, ismain);
+  return 2;
+}
+
+
+static int luaB_close (lua_State *L) {
+  lua_State *co = getco(L);
+  int status = auxstatus(L, co);
+  switch (status) {
+    case COS_DEAD: case COS_YIELD: {
+      status = lua_closethread(co, L);
+      if (status == LUA_OK) {
+        lua_pushboolean(L, 1);
+        return 1;
+      }
+      else {
+        lua_pushboolean(L, 0);
+        lua_xmove(co, L, 1);  /* move error message */
+        return 2;
+      }
+    }
+    default:  /* normal or running coroutine */
+      return luaL_error(L, "cannot close a %s coroutine", statname[status]);
+  }
+}
+
+
+static const luaL_Reg co_funcs[] = {
+  {"create", luaB_cocreate},
+  {"resume", luaB_coresume},
+  {"running", luaB_corunning},
+  {"status", luaB_costatus},
+  {"wrap", luaB_cowrap},
+  {"yield", luaB_yield},
+  {"isyieldable", luaB_yieldable},
+  {"close", luaB_close},
+  {NULL, NULL}
+};
+
+
+
+LUAMOD_API int luaopen_coroutine (lua_State *L) {
+  luaL_newlib(L, co_funcs);
+  return 1;
+}
+
@@ -0,0 +1,64 @@
+/*
+** $Id: lctype.c $
+** 'ctype' functions for Lua
+** See Copyright Notice in lua.h
+*/
+
+#define lctype_c
+#define LUA_CORE
+
+#include "lprefix.h"
+
+
+#include "lctype.h"
+
+#if !LUA_USE_CTYPE	/* { */
+
+#include <limits.h>
+
+
+#if defined (LUA_UCID)		/* accept UniCode IDentifiers? */
+/* consider all non-ascii codepoints to be alphabetic */
+#define NONA		0x01
+#else
+#define NONA		0x00	/* default */
+#endif
+
+
+LUAI_DDEF const lu_byte luai_ctype_[UCHAR_MAX + 2] = {
+  0x00,  /* EOZ */
+  0x00,  0x00,  0x00,  0x00,  0x00,  0x00,  0x00,  0x00,	/* 0. */
+  0x00,  0x08,  0x08,  0x08,  0x08,  0x08,  0x00,  0x00,
+  0x00,  0x00,  0x00,  0x00,  0x00,  0x00,  0x00,  0x00,	/* 1. */
+  0x00,  0x00,  0x00,  0x00,  0x00,  0x00,  0x00,  0x00,
+  0x0c,  0x04,  0x04,  0x04,  0x04,  0x04,  0x04,  0x04,	/* 2. */
+  0x04,  0x04,  0x04,  0x04,  0x04,  0x04,  0x04,  0x04,
+  0x16,  0x16,  0x16,  0x16,  0x16,  0x16,  0x16,  0x16,	/* 3. */
+  0x16,  0x16,  0x04,  0x04,  0x04,  0x04,  0x04,  0x04,
+  0x04,  0x15,  0x15,  0x15,  0x15,  0x15,  0x15,  0x05,	/* 4. */
+  0x05,  0x05,  0x05,  0x05,  0x05,  0x05,  0x05,  0x05,
+  0x05,  0x05,  0x05,  0x05,  0x05,  0x05,  0x05,  0x05,	/* 5. */
+  0x05,  0x05,  0x05,  0x04,  0x04,  0x04,  0x04,  0x05,
+  0x04,  0x15,  0x15,  0x15,  0x15,  0x15,  0x15,  0x05,	/* 6. */
+  0x05,  0x05,  0x05,  0x05,  0x05,  0x05,  0x05,  0x05,
+  0x05,  0x05,  0x05,  0x05,  0x05,  0x05,  0x05,  0x05,	/* 7. */
+  0x05,  0x05,  0x05,  0x04,  0x04,  0x04,  0x04,  0x00,
+  NONA,  NONA,  NONA,  NONA,  NONA,  NONA,  NONA,  NONA,	/* 8. */
+  NONA,  NONA,  NONA,  NONA,  NONA,  NONA,  NONA,  NONA,
+  NONA,  NONA,  NONA,  NONA,  NONA,  NONA,  NONA,  NONA,	/* 9. */
+  NONA,  NONA,  NONA,  NONA,  NONA,  NONA,  NONA,  NONA,
+  NONA,  NONA,  NONA,  NONA,  NONA,  NONA,  NONA,  NONA,	/* a. */
+  NONA,  NONA,  NONA,  NONA,  NONA,  NONA,  NONA,  NONA,
+  NONA,  NONA,  NONA,  NONA,  NONA,  NONA,  NONA,  NONA,	/* b. */
+  NONA,  NONA,  NONA,  NONA,  NONA,  NONA,  NONA,  NONA,
+  0x00,  0x00,  NONA,  NONA,  NONA,  NONA,  NONA,  NONA,	/* c. */
+  NONA,  NONA,  NONA,  NONA,  NONA,  NONA,  NONA,  NONA,
+  NONA,  NONA,  NONA,  NONA,  NONA,  NONA,  NONA,  NONA,	/* d. */
+  NONA,  NONA,  NONA,  NONA,  NONA,  NONA,  NONA,  NONA,
+  NONA,  NONA,  NONA,  NONA,  NONA,  NONA,  NONA,  NONA,	/* e. */
+  NONA,  NONA,  NONA,  NONA,  NONA,  NONA,  NONA,  NONA,
+  NONA,  NONA,  NONA,  NONA,  NONA,  0x00,  0x00,  0x00,	/* f. */
+  0x00,  0x00,  0x00,  0x00,  0x00,  0x00,  0x00,  0x00
+};
+
+#endif			/* } */
@@ -0,0 +1,101 @@
+/*
+** $Id: lctype.h $
+** 'ctype' functions for Lua
+** See Copyright Notice in lua.h
+*/
+
+#ifndef lctype_h
+#define lctype_h
+
+#include "lua.h"
+
+
+/*
+** WARNING: the functions defined here do not necessarily correspond
+** to the similar functions in the standard C ctype.h. They are
+** optimized for the specific needs of Lua.
+*/
+
+#if !defined(LUA_USE_CTYPE)
+
+#if 'A' == 65 && '0' == 48
+/* ASCII case: can use its own tables; faster and fixed */
+#define LUA_USE_CTYPE	0
+#else
+/* must use standard C ctype */
+#define LUA_USE_CTYPE	1
+#endif
+
+#endif
+
+
+#if !LUA_USE_CTYPE	/* { */
+
+#include <limits.h>
+
+#include "llimits.h"
+
+
+#define ALPHABIT	0
+#define DIGITBIT	1
+#define PRINTBIT	2
+#define SPACEBIT	3
+#define XDIGITBIT	4
+
+
+#define MASK(B)		(1 << (B))
+
+
+/*
+** add 1 to char to allow index -1 (EOZ)
+*/
+#define testprop(c,p)	(luai_ctype_[(c)+1] & (p))
+
+/*
+** 'lalpha' (Lua alphabetic) and 'lalnum' (Lua alphanumeric) both include '_'
+*/
+#define lislalpha(c)	testprop(c, MASK(ALPHABIT))
+#define lislalnum(c)	testprop(c, (MASK(ALPHABIT) | MASK(DIGITBIT)))
+#define lisdigit(c)	testprop(c, MASK(DIGITBIT))
+#define lisspace(c)	testprop(c, MASK(SPACEBIT))
+#define lisprint(c)	testprop(c, MASK(PRINTBIT))
+#define lisxdigit(c)	testprop(c, MASK(XDIGITBIT))
+
+
+/*
+** In ASCII, this 'ltolower' is correct for alphabetic characters and
+** for '.'. That is enough for Lua needs. ('check_exp' ensures that
+** the character either is an upper-case letter or is unchanged by
+** the transformation, which holds for lower-case letters and '.'.)
+*/
+#define ltolower(c)  \
+  check_exp(('A' <= (c) && (c) <= 'Z') || (c) == ((c) | ('A' ^ 'a')),  \
+            (c) | ('A' ^ 'a'))
+
+
+/* one entry for each character and for -1 (EOZ) */
+LUAI_DDEC(const lu_byte luai_ctype_[UCHAR_MAX + 2];)
+
+
+#else			/* }{ */
+
+/*
+** use standard C ctypes
+*/
+
+#include <ctype.h>
+
+
+#define lislalpha(c)	(isalpha(c) || (c) == '_')
+#define lislalnum(c)	(isalnum(c) || (c) == '_')
+#define lisdigit(c)	(isdigit(c))
+#define lisspace(c)	(isspace(c))
+#define lisprint(c)	(isprint(c))
+#define lisxdigit(c)	(isxdigit(c))
+
+#define ltolower(c)	(tolower(c))
+
+#endif			/* } */
+
+#endif
+
@@ -0,0 +1,483 @@
+/*
+** $Id: ldblib.c $
+** Interface from Lua to its debug API
+** See Copyright Notice in lua.h
+*/
+
+#define ldblib_c
+#define LUA_LIB
+
+#include "lprefix.h"
+
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+#include "lua.h"
+
+#include "lauxlib.h"
+#include "lualib.h"
+
+
+/*
+** The hook table at registry[HOOKKEY] maps threads to their current
+** hook function.
+*/
+static const char *const HOOKKEY = "_HOOKKEY";
+
+
+/*
+** If L1 != L, L1 can be in any state, and therefore there are no
+** guarantees about its stack space; any push in L1 must be
+** checked.
+*/
+static void checkstack (lua_State *L, lua_State *L1, int n) {
+  if (l_unlikely(L != L1 && !lua_checkstack(L1, n)))
+    luaL_error(L, "stack overflow");
+}
+
+
+static int db_getregistry (lua_State *L) {
+  lua_pushvalue(L, LUA_REGISTRYINDEX);
+  return 1;
+}
+
+
+static int db_getmetatable (lua_State *L) {
+  luaL_checkany(L, 1);
+  if (!lua_getmetatable(L, 1)) {
+    lua_pushnil(L);  /* no metatable */
+  }
+  return 1;
+}
+
+
+static int db_setmetatable (lua_State *L) {
+  int t = lua_type(L, 2);
+  luaL_argexpected(L, t == LUA_TNIL || t == LUA_TTABLE, 2, "nil or table");
+  lua_settop(L, 2);
+  lua_setmetatable(L, 1);
+  return 1;  /* return 1st argument */
+}
+
+
+static int db_getuservalue (lua_State *L) {
+  int n = (int)luaL_optinteger(L, 2, 1);
+  if (lua_type(L, 1) != LUA_TUSERDATA)
+    luaL_pushfail(L);
+  else if (lua_getiuservalue(L, 1, n) != LUA_TNONE) {
+    lua_pushboolean(L, 1);
+    return 2;
+  }
+  return 1;
+}
+
+
+static int db_setuservalue (lua_State *L) {
+  int n = (int)luaL_optinteger(L, 3, 1);
+  luaL_checktype(L, 1, LUA_TUSERDATA);
+  luaL_checkany(L, 2);
+  lua_settop(L, 2);
+  if (!lua_setiuservalue(L, 1, n))
+    luaL_pushfail(L);
+  return 1;
+}
+
+
+/*
+** Auxiliary function used by several library functions: check for
+** an optional thread as function's first argument and set 'arg' with
+** 1 if this argument is present (so that functions can skip it to
+** access their other arguments)
+*/
+static lua_State *getthread (lua_State *L, int *arg) {
+  if (lua_isthread(L, 1)) {
+    *arg = 1;
+    return lua_tothread(L, 1);
+  }
+  else {
+    *arg = 0;
+    return L;  /* function will operate over current thread */
+  }
+}
+
+
+/*
+** Variations of 'lua_settable', used by 'db_getinfo' to put results
+** from 'lua_getinfo' into result table. Key is always a string;
+** value can be a string, an int, or a boolean.
+*/
+static void settabss (lua_State *L, const char *k, const char *v) {
+  lua_pushstring(L, v);
+  lua_setfield(L, -2, k);
+}
+
+static void settabsi (lua_State *L, const char *k, int v) {
+  lua_pushinteger(L, v);
+  lua_setfield(L, -2, k);
+}
+
+static void settabsb (lua_State *L, const char *k, int v) {
+  lua_pushboolean(L, v);
+  lua_setfield(L, -2, k);
+}
+
+
+/*
+** In function 'db_getinfo', the call to 'lua_getinfo' may push
+** results on the stack; later it creates the result table to put
+** these objects. Function 'treatstackoption' puts the result from
+** 'lua_getinfo' on top of the result table so that it can call
+** 'lua_setfield'.
+*/
+static void treatstackoption (lua_State *L, lua_State *L1, const char *fname) {
+  if (L == L1)
+    lua_rotate(L, -2, 1);  /* exchange object and table */
+  else
+    lua_xmove(L1, L, 1);  /* move object to the "main" stack */
+  lua_setfield(L, -2, fname);  /* put object into table */
+}
+
+
+/*
+** Calls 'lua_getinfo' and collects all results in a new table.
+** L1 needs stack space for an optional input (function) plus
+** two optional outputs (function and line table) from function
+** 'lua_getinfo'.
+*/
+static int db_getinfo (lua_State *L) {
+  lua_Debug ar;
+  int arg;
+  lua_State *L1 = getthread(L, &arg);
+  const char *options = luaL_optstring(L, arg+2, "flnSrtu");
+  checkstack(L, L1, 3);
+  luaL_argcheck(L, options[0] != '>', arg + 2, "invalid option '>'");
+  if (lua_isfunction(L, arg + 1)) {  /* info about a function? */
+    options = lua_pushfstring(L, ">%s", options);  /* add '>' to 'options' */
+    lua_pushvalue(L, arg + 1);  /* move function to 'L1' stack */
+    lua_xmove(L, L1, 1);
+  }
+  else {  /* stack level */
+    if (!lua_getstack(L1, (int)luaL_checkinteger(L, arg + 1), &ar)) {
+      luaL_pushfail(L);  /* level out of range */
+      return 1;
+    }
+  }
+  if (!lua_getinfo(L1, options, &ar))
+    return luaL_argerror(L, arg+2, "invalid option");
+  lua_newtable(L);  /* table to collect results */
+  if (strchr(options, 'S')) {
+    lua_pushlstring(L, ar.source, ar.srclen);
+    lua_setfield(L, -2, "source");
+    settabss(L, "short_src", ar.short_src);
+    settabsi(L, "linedefined", ar.linedefined);
+    settabsi(L, "lastlinedefined", ar.lastlinedefined);
+    settabss(L, "what", ar.what);
+  }
+  if (strchr(options, 'l'))
+    settabsi(L, "currentline", ar.currentline);
+  if (strchr(options, 'u')) {
+    settabsi(L, "nups", ar.nups);
+    settabsi(L, "nparams", ar.nparams);
+    settabsb(L, "isvararg", ar.isvararg);
+  }
+  if (strchr(options, 'n')) {
+    settabss(L, "name", ar.name);
+    settabss(L, "namewhat", ar.namewhat);
+  }
+  if (strchr(options, 'r')) {
+    settabsi(L, "ftransfer", ar.ftransfer);
+    settabsi(L, "ntransfer", ar.ntransfer);
+  }
+  if (strchr(options, 't'))
+    settabsb(L, "istailcall", ar.istailcall);
+  if (strchr(options, 'L'))
+    treatstackoption(L, L1, "activelines");
+  if (strchr(options, 'f'))
+    treatstackoption(L, L1, "func");
+  return 1;  /* return table */
+}
+
+
+static int db_getlocal (lua_State *L) {
+  int arg;
+  lua_State *L1 = getthread(L, &arg);
+  int nvar = (int)luaL_checkinteger(L, arg + 2);  /* local-variable index */
+  if (lua_isfunction(L, arg + 1)) {  /* function argument? */
+    lua_pushvalue(L, arg + 1);  /* push function */
+    lua_pushstring(L, lua_getlocal(L, NULL, nvar));  /* push local name */
+    return 1;  /* return only name (there is no value) */
+  }
+  else {  /* stack-level argument */
+    lua_Debug ar;
+    const char *name;
+    int level = (int)luaL_checkinteger(L, arg + 1);
+    if (l_unlikely(!lua_getstack(L1, level, &ar)))  /* out of range? */
+      return luaL_argerror(L, arg+1, "level out of range");
+    checkstack(L, L1, 1);
+    name = lua_getlocal(L1, &ar, nvar);
+    if (name) {
+      lua_xmove(L1, L, 1);  /* move local value */
+      lua_pushstring(L, name);  /* push name */
+      lua_rotate(L, -2, 1);  /* re-order */
+      return 2;
+    }
+    else {
+      luaL_pushfail(L);  /* no name (nor value) */
+      return 1;
+    }
+  }
+}
+
+
+static int db_setlocal (lua_State *L) {
+  int arg;
+  const char *name;
+  lua_State *L1 = getthread(L, &arg);
+  lua_Debug ar;
+  int level = (int)luaL_checkinteger(L, arg + 1);
+  int nvar = (int)luaL_checkinteger(L, arg + 2);
+  if (l_unlikely(!lua_getstack(L1, level, &ar)))  /* out of range? */
+    return luaL_argerror(L, arg+1, "level out of range");
+  luaL_checkany(L, arg+3);
+  lua_settop(L, arg+3);
+  checkstack(L, L1, 1);
+  lua_xmove(L, L1, 1);
+  name = lua_setlocal(L1, &ar, nvar);
+  if (name == NULL)
+    lua_pop(L1, 1);  /* pop value (if not popped by 'lua_setlocal') */
+  lua_pushstring(L, name);
+  return 1;
+}
+
+
+/*
+** get (if 'get' is true) or set an upvalue from a closure
+*/
+static int auxupvalue (lua_State *L, int get) {
+  const char *name;
+  int n = (int)luaL_checkinteger(L, 2);  /* upvalue index */
+  luaL_checktype(L, 1, LUA_TFUNCTION);  /* closure */
+  name = get ? lua_getupvalue(L, 1, n) : lua_setupvalue(L, 1, n);
+  if (name == NULL) return 0;
+  lua_pushstring(L, name);
+  lua_insert(L, -(get+1));  /* no-op if get is false */
+  return get + 1;
+}
+
+
+static int db_getupvalue (lua_State *L) {
+  return auxupvalue(L, 1);
+}
+
+
+static int db_setupvalue (lua_State *L) {
+  luaL_checkany(L, 3);
+  return auxupvalue(L, 0);
+}
+
+
+/*
+** Check whether a given upvalue from a given closure exists and
+** returns its index
+*/
+static void *checkupval (lua_State *L, int argf, int argnup, int *pnup) {
+  void *id;
+  int nup = (int)luaL_checkinteger(L, argnup);  /* upvalue index */
+  luaL_checktype(L, argf, LUA_TFUNCTION);  /* closure */
+  id = lua_upvalueid(L, argf, nup);
+  if (pnup) {
+    luaL_argcheck(L, id != NULL, argnup, "invalid upvalue index");
+    *pnup = nup;
+  }
+  return id;
+}
+
+
+static int db_upvalueid (lua_State *L) {
+  void *id = checkupval(L, 1, 2, NULL);
+  if (id != NULL)
+    lua_pushlightuserdata(L, id);
+  else
+    luaL_pushfail(L);
+  return 1;
+}
+
+
+static int db_upvaluejoin (lua_State *L) {
+  int n1, n2;
+  checkupval(L, 1, 2, &n1);
+  checkupval(L, 3, 4, &n2);
+  luaL_argcheck(L, !lua_iscfunction(L, 1), 1, "Lua function expected");
+  luaL_argcheck(L, !lua_iscfunction(L, 3), 3, "Lua function expected");
+  lua_upvaluejoin(L, 1, n1, 3, n2);
+  return 0;
+}
+
+
+/*
+** Call hook function registered at hook table for the current
+** thread (if there is one)
+*/
+static void hookf (lua_State *L, lua_Debug *ar) {
+  static const char *const hooknames[] =
+    {"call", "return", "line", "count", "tail call"};
+  lua_getfield(L, LUA_REGISTRYINDEX, HOOKKEY);
+  lua_pushthread(L);
+  if (lua_rawget(L, -2) == LUA_TFUNCTION) {  /* is there a hook function? */
+    lua_pushstring(L, hooknames[(int)ar->event]);  /* push event name */
+    if (ar->currentline >= 0)
+      lua_pushinteger(L, ar->currentline);  /* push current line */
+    else lua_pushnil(L);
+    lua_assert(lua_getinfo(L, "lS", ar));
+    lua_call(L, 2, 0);  /* call hook function */
+  }
+}
+
+
+/*
+** Convert a string mask (for 'sethook') into a bit mask
+*/
+static int makemask (const char *smask, int count) {
+  int mask = 0;
+  if (strchr(smask, 'c')) mask |= LUA_MASKCALL;
+  if (strchr(smask, 'r')) mask |= LUA_MASKRET;
+  if (strchr(smask, 'l')) mask |= LUA_MASKLINE;
+  if (count > 0) mask |= LUA_MASKCOUNT;
+  return mask;
+}
+
+
+/*
+** Convert a bit mask (for 'gethook') into a string mask
+*/
+static char *unmakemask (int mask, char *smask) {
+  int i = 0;
+  if (mask & LUA_MASKCALL) smask[i++] = 'c';
+  if (mask & LUA_MASKRET) smask[i++] = 'r';
+  if (mask & LUA_MASKLINE) smask[i++] = 'l';
+  smask[i] = '\0';
+  return smask;
+}
+
+
+static int db_sethook (lua_State *L) {
+  int arg, mask, count;
+  lua_Hook func;
+  lua_State *L1 = getthread(L, &arg);
+  if (lua_isnoneornil(L, arg+1)) {  /* no hook? */
+    lua_settop(L, arg+1);
+    func = NULL; mask = 0; count = 0;  /* turn off hooks */
+  }
+  else {
+    const char *smask = luaL_checkstring(L, arg+2);
+    luaL_checktype(L, arg+1, LUA_TFUNCTION);
+    count = (int)luaL_optinteger(L, arg + 3, 0);
+    func = hookf; mask = makemask(smask, count);
+  }
+  if (!luaL_getsubtable(L, LUA_REGISTRYINDEX, HOOKKEY)) {
+    /* table just created; initialize it */
+    lua_pushliteral(L, "k");
+    lua_setfield(L, -2, "__mode");  /** hooktable.__mode = "k" */
+    lua_pushvalue(L, -1);
+    lua_setmetatable(L, -2);  /* metatable(hooktable) = hooktable */
+  }
+  checkstack(L, L1, 1);
+  lua_pushthread(L1); lua_xmove(L1, L, 1);  /* key (thread) */
+  lua_pushvalue(L, arg + 1);  /* value (hook function) */
+  lua_rawset(L, -3);  /* hooktable[L1] = new Lua hook */
+  lua_sethook(L1, func, mask, count);
+  return 0;
+}
+
+
+static int db_gethook (lua_State *L) {
+  int arg;
+  lua_State *L1 = getthread(L, &arg);
+  char buff[5];
+  int mask = lua_gethookmask(L1);
+  lua_Hook hook = lua_gethook(L1);
+  if (hook == NULL) {  /* no hook? */
+    luaL_pushfail(L);
+    return 1;
+  }
+  else if (hook != hookf)  /* external hook? */
+    lua_pushliteral(L, "external hook");
+  else {  /* hook table must exist */
+    lua_getfield(L, LUA_REGISTRYINDEX, HOOKKEY);
+    checkstack(L, L1, 1);
+    lua_pushthread(L1); lua_xmove(L1, L, 1);
+    lua_rawget(L, -2);   /* 1st result = hooktable[L1] */
+    lua_remove(L, -2);  /* remove hook table */
+  }
+  lua_pushstring(L, unmakemask(mask, buff));  /* 2nd result = mask */
+  lua_pushinteger(L, lua_gethookcount(L1));  /* 3rd result = count */
+  return 3;
+}
+
+
+static int db_debug (lua_State *L) {
+  for (;;) {
+    char buffer[250];
+    lua_writestringerror("%s", "lua_debug> ");
+    if (fgets(buffer, sizeof(buffer), stdin) == NULL ||
+        strcmp(buffer, "cont\n") == 0)
+      return 0;
+    if (luaL_loadbuffer(L, buffer, strlen(buffer), "=(debug command)") ||
+        lua_pcall(L, 0, 0, 0))
+      lua_writestringerror("%s\n", luaL_tolstring(L, -1, NULL));
+    lua_settop(L, 0);  /* remove eventual returns */
+  }
+}
+
+
+static int db_traceback (lua_State *L) {
+  int arg;
+  lua_State *L1 = getthread(L, &arg);
+  const char *msg = lua_tostring(L, arg + 1);
+  if (msg == NULL && !lua_isnoneornil(L, arg + 1))  /* non-string 'msg'? */
+    lua_pushvalue(L, arg + 1);  /* return it untouched */
+  else {
+    int level = (int)luaL_optinteger(L, arg + 2, (L == L1) ? 1 : 0);
+    luaL_traceback(L, L1, msg, level);
+  }
+  return 1;
+}
+
+
+static int db_setcstacklimit (lua_State *L) {
+  int limit = (int)luaL_checkinteger(L, 1);
+  int res = lua_setcstacklimit(L, limit);
+  lua_pushinteger(L, res);
+  return 1;
+}
+
+
+static const luaL_Reg dblib[] = {
+  {"debug", db_debug},
+  {"getuservalue", db_getuservalue},
+  {"gethook", db_gethook},
+  {"getinfo", db_getinfo},
+  {"getlocal", db_getlocal},
+  {"getregistry", db_getregistry},
+  {"getmetatable", db_getmetatable},
+  {"getupvalue", db_getupvalue},
+  {"upvaluejoin", db_upvaluejoin},
+  {"upvalueid", db_upvalueid},
+  {"setuservalue", db_setuservalue},
+  {"sethook", db_sethook},
+  {"setlocal", db_setlocal},
+  {"setmetatable", db_setmetatable},
+  {"setupvalue", db_setupvalue},
+  {"traceback", db_traceback},
+  {"setcstacklimit", db_setcstacklimit},
+  {NULL, NULL}
+};
+
+
+LUAMOD_API int luaopen_debug (lua_State *L) {
+  luaL_newlib(L, dblib);
+  return 1;
+}
+
@@ -0,0 +1,962 @@
+/*
+** $Id: ldebug.c $
+** Debug Interface
+** See Copyright Notice in lua.h
+*/
+
+#define ldebug_c
+#define LUA_CORE
+
+#include "lprefix.h"
+
+
+#include <stdarg.h>
+#include <stddef.h>
+#include <string.h>
+
+#include "lua.h"
+
+#include "lapi.h"
+#include "lcode.h"
+#include "ldebug.h"
+#include "ldo.h"
+#include "lfunc.h"
+#include "lobject.h"
+#include "lopcodes.h"
+#include "lstate.h"
+#include "lstring.h"
+#include "ltable.h"
+#include "ltm.h"
+#include "lvm.h"
+
+
+
+#define LuaClosure(f)		((f) != NULL && (f)->c.tt == LUA_VLCL)
+
+
+static const char *funcnamefromcall (lua_State *L, CallInfo *ci,
+                                                   const char **name);
+
+
+static int currentpc (CallInfo *ci) {
+  lua_assert(isLua(ci));
+  return pcRel(ci->u.l.savedpc, ci_func(ci)->p);
+}
+
+
+/*
+** Get a "base line" to find the line corresponding to an instruction.
+** Base lines are regularly placed at MAXIWTHABS intervals, so usually
+** an integer division gets the right place. When the source file has
+** large sequences of empty/comment lines, it may need extra entries,
+** so the original estimate needs a correction.
+** If the original estimate is -1, the initial 'if' ensures that the
+** 'while' will run at least once.
+** The assertion that the estimate is a lower bound for the correct base
+** is valid as long as the debug info has been generated with the same
+** value for MAXIWTHABS or smaller. (Previous releases use a little
+** smaller value.)
+*/
+static int getbaseline (const Proto *f, int pc, int *basepc) {
+  if (f->sizeabslineinfo == 0 || pc < f->abslineinfo[0].pc) {
+    *basepc = -1;  /* start from the beginning */
+    return f->linedefined;
+  }
+  else {
+    int i = cast_uint(pc) / MAXIWTHABS - 1;  /* get an estimate */
+    /* estimate must be a lower bound of the correct base */
+    lua_assert(i < 0 ||
+              (i < f->sizeabslineinfo && f->abslineinfo[i].pc <= pc));
+    while (i + 1 < f->sizeabslineinfo && pc >= f->abslineinfo[i + 1].pc)
+      i++;  /* low estimate; adjust it */
+    *basepc = f->abslineinfo[i].pc;
+    return f->abslineinfo[i].line;
+  }
+}
+
+
+/*
+** Get the line corresponding to instruction 'pc' in function 'f';
+** first gets a base line and from there does the increments until
+** the desired instruction.
+*/
+int luaG_getfuncline (const Proto *f, int pc) {
+  if (f->lineinfo == NULL)  /* no debug information? */
+    return -1;
+  else {
+    int basepc;
+    int baseline = getbaseline(f, pc, &basepc);
+    while (basepc++ < pc) {  /* walk until given instruction */
+      lua_assert(f->lineinfo[basepc] != ABSLINEINFO);
+      baseline += f->lineinfo[basepc];  /* correct line */
+    }
+    return baseline;
+  }
+}
+
+
+static int getcurrentline (CallInfo *ci) {
+  return luaG_getfuncline(ci_func(ci)->p, currentpc(ci));
+}
+
+
+/*
+** Set 'trap' for all active Lua frames.
+** This function can be called during a signal, under "reasonable"
+** assumptions. A new 'ci' is completely linked in the list before it
+** becomes part of the "active" list, and we assume that pointers are
+** atomic; see comment in next function.
+** (A compiler doing interprocedural optimizations could, theoretically,
+** reorder memory writes in such a way that the list could be
+** temporarily broken while inserting a new element. We simply assume it
+** has no good reasons to do that.)
+*/
+static void settraps (CallInfo *ci) {
+  for (; ci != NULL; ci = ci->previous)
+    if (isLua(ci))
+      ci->u.l.trap = 1;
+}
+
+
+/*
+** This function can be called during a signal, under "reasonable"
+** assumptions.
+** Fields 'basehookcount' and 'hookcount' (set by 'resethookcount')
+** are for debug only, and it is no problem if they get arbitrary
+** values (causes at most one wrong hook call). 'hookmask' is an atomic
+** value. We assume that pointers are atomic too (e.g., gcc ensures that
+** for all platforms where it runs). Moreover, 'hook' is always checked
+** before being called (see 'luaD_hook').
+*/
+LUA_API void lua_sethook (lua_State *L, lua_Hook func, int mask, int count) {
+  if (func == NULL || mask == 0) {  /* turn off hooks? */
+    mask = 0;
+    func = NULL;
+  }
+  L->hook = func;
+  L->basehookcount = count;
+  resethookcount(L);
+  L->hookmask = cast_byte(mask);
+  if (mask)
+    settraps(L->ci);  /* to trace inside 'luaV_execute' */
+}
+
+
+LUA_API lua_Hook lua_gethook (lua_State *L) {
+  return L->hook;
+}
+
+
+LUA_API int lua_gethookmask (lua_State *L) {
+  return L->hookmask;
+}
+
+
+LUA_API int lua_gethookcount (lua_State *L) {
+  return L->basehookcount;
+}
+
+
+LUA_API int lua_getstack (lua_State *L, int level, lua_Debug *ar) {
+  int status;
+  CallInfo *ci;
+  if (level < 0) return 0;  /* invalid (negative) level */
+  lua_lock(L);
+  for (ci = L->ci; level > 0 && ci != &L->base_ci; ci = ci->previous)
+    level--;
+  if (level == 0 && ci != &L->base_ci) {  /* level found? */
+    status = 1;
+    ar->i_ci = ci;
+  }
+  else status = 0;  /* no such level */
+  lua_unlock(L);
+  return status;
+}
+
+
+static const char *upvalname (const Proto *p, int uv) {
+  TString *s = check_exp(uv < p->sizeupvalues, p->upvalues[uv].name);
+  if (s == NULL) return "?";
+  else return getstr(s);
+}
+
+
+static const char *findvararg (CallInfo *ci, int n, StkId *pos) {
+  if (clLvalue(s2v(ci->func.p))->p->is_vararg) {
+    int nextra = ci->u.l.nextraargs;
+    if (n >= -nextra) {  /* 'n' is negative */
+      *pos = ci->func.p - nextra - (n + 1);
+      return "(vararg)";  /* generic name for any vararg */
+    }
+  }
+  return NULL;  /* no such vararg */
+}
+
+
+const char *luaG_findlocal (lua_State *L, CallInfo *ci, int n, StkId *pos) {
+  StkId base = ci->func.p + 1;
+  const char *name = NULL;
+  if (isLua(ci)) {
+    if (n < 0)  /* access to vararg values? */
+      return findvararg(ci, n, pos);
+    else
+      name = luaF_getlocalname(ci_func(ci)->p, n, currentpc(ci));
+  }
+  if (name == NULL) {  /* no 'standard' name? */
+    StkId limit = (ci == L->ci) ? L->top.p : ci->next->func.p;
+    if (limit - base >= n && n > 0) {  /* is 'n' inside 'ci' stack? */
+      /* generic name for any valid slot */
+      name = isLua(ci) ? "(temporary)" : "(C temporary)";
+    }
+    else
+      return NULL;  /* no name */
+  }
+  if (pos)
+    *pos = base + (n - 1);
+  return name;
+}
+
+
+LUA_API const char *lua_getlocal (lua_State *L, const lua_Debug *ar, int n) {
+  const char *name;
+  lua_lock(L);
+  if (ar == NULL) {  /* information about non-active function? */
+    if (!isLfunction(s2v(L->top.p - 1)))  /* not a Lua function? */
+      name = NULL;
+    else  /* consider live variables at function start (parameters) */
+      name = luaF_getlocalname(clLvalue(s2v(L->top.p - 1))->p, n, 0);
+  }
+  else {  /* active function; get information through 'ar' */
+    StkId pos = NULL;  /* to avoid warnings */
+    name = luaG_findlocal(L, ar->i_ci, n, &pos);
+    if (name) {
+      setobjs2s(L, L->top.p, pos);
+      api_incr_top(L);
+    }
+  }
+  lua_unlock(L);
+  return name;
+}
+
+
+LUA_API const char *lua_setlocal (lua_State *L, const lua_Debug *ar, int n) {
+  StkId pos = NULL;  /* to avoid warnings */
+  const char *name;
+  lua_lock(L);
+  name = luaG_findlocal(L, ar->i_ci, n, &pos);
+  if (name) {
+    setobjs2s(L, pos, L->top.p - 1);
+    L->top.p--;  /* pop value */
+  }
+  lua_unlock(L);
+  return name;
+}
+
+
+static void funcinfo (lua_Debug *ar, Closure *cl) {
+  if (!LuaClosure(cl)) {
+    ar->source = "=[C]";
+    ar->srclen = LL("=[C]");
+    ar->linedefined = -1;
+    ar->lastlinedefined = -1;
+    ar->what = "C";
+  }
+  else {
+    const Proto *p = cl->l.p;
+    if (p->source) {
+      ar->source = getstr(p->source);
+      ar->srclen = tsslen(p->source);
+    }
+    else {
+      ar->source = "=?";
+      ar->srclen = LL("=?");
+    }
+    ar->linedefined = p->linedefined;
+    ar->lastlinedefined = p->lastlinedefined;
+    ar->what = (ar->linedefined == 0) ? "main" : "Lua";
+  }
+  luaO_chunkid(ar->short_src, ar->source, ar->srclen);
+}
+
+
+static int nextline (const Proto *p, int currentline, int pc) {
+  if (p->lineinfo[pc] != ABSLINEINFO)
+    return currentline + p->lineinfo[pc];
+  else
+    return luaG_getfuncline(p, pc);
+}
+
+
+static void collectvalidlines (lua_State *L, Closure *f) {
+  if (!LuaClosure(f)) {
+    setnilvalue(s2v(L->top.p));
+    api_incr_top(L);
+  }
+  else {
+    const Proto *p = f->l.p;
+    int currentline = p->linedefined;
+    Table *t = luaH_new(L);  /* new table to store active lines */
+    sethvalue2s(L, L->top.p, t);  /* push it on stack */
+    api_incr_top(L);
+    if (p->lineinfo != NULL) {  /* proto with debug information? */
+      int i;
+      TValue v;
+      setbtvalue(&v);  /* boolean 'true' to be the value of all indices */
+      if (!p->is_vararg)  /* regular function? */
+        i = 0;  /* consider all instructions */
+      else {  /* vararg function */
+        lua_assert(GET_OPCODE(p->code[0]) == OP_VARARGPREP);
+        currentline = nextline(p, currentline, 0);
+        i = 1;  /* skip first instruction (OP_VARARGPREP) */
+      }
+      for (; i < p->sizelineinfo; i++) {  /* for each instruction */
+        currentline = nextline(p, currentline, i);  /* get its line */
+        luaH_setint(L, t, currentline, &v);  /* table[line] = true */
+      }
+    }
+  }
+}
+
+
+static const char *getfuncname (lua_State *L, CallInfo *ci, const char **name) {
+  /* calling function is a known function? */
+  if (ci != NULL && !(ci->callstatus & CIST_TAIL))
+    return funcnamefromcall(L, ci->previous, name);
+  else return NULL;  /* no way to find a name */
+}
+
+
+static int auxgetinfo (lua_State *L, const char *what, lua_Debug *ar,
+                       Closure *f, CallInfo *ci) {
+  int status = 1;
+  for (; *what; what++) {
+    switch (*what) {
+      case 'S': {
+        funcinfo(ar, f);
+        break;
+      }
+      case 'l': {
+        ar->currentline = (ci && isLua(ci)) ? getcurrentline(ci) : -1;
+        break;
+      }
+      case 'u': {
+        ar->nups = (f == NULL) ? 0 : f->c.nupvalues;
+        if (!LuaClosure(f)) {
+          ar->isvararg = 1;
+          ar->nparams = 0;
+        }
+        else {
+          ar->isvararg = f->l.p->is_vararg;
+          ar->nparams = f->l.p->numparams;
+        }
+        break;
+      }
+      case 't': {
+        ar->istailcall = (ci) ? ci->callstatus & CIST_TAIL : 0;
+        break;
+      }
+      case 'n': {
+        ar->namewhat = getfuncname(L, ci, &ar->name);
+        if (ar->namewhat == NULL) {
+          ar->namewhat = "";  /* not found */
+          ar->name = NULL;
+        }
+        break;
+      }
+      case 'r': {
+        if (ci == NULL || !(ci->callstatus & CIST_TRAN))
+          ar->ftransfer = ar->ntransfer = 0;
+        else {
+          ar->ftransfer = ci->u2.transferinfo.ftransfer;
+          ar->ntransfer = ci->u2.transferinfo.ntransfer;
+        }
+        break;
+      }
+      case 'L':
+      case 'f':  /* handled by lua_getinfo */
+        break;
+      default: status = 0;  /* invalid option */
+    }
+  }
+  return status;
+}
+
+
+LUA_API int lua_getinfo (lua_State *L, const char *what, lua_Debug *ar) {
+  int status;
+  Closure *cl;
+  CallInfo *ci;
+  TValue *func;
+  lua_lock(L);
+  if (*what == '>') {
+    ci = NULL;
+    func = s2v(L->top.p - 1);
+    api_check(L, ttisfunction(func), "function expected");
+    what++;  /* skip the '>' */
+    L->top.p--;  /* pop function */
+  }
+  else {
+    ci = ar->i_ci;
+    func = s2v(ci->func.p);
+    lua_assert(ttisfunction(func));
+  }
+  cl = ttisclosure(func) ? clvalue(func) : NULL;
+  status = auxgetinfo(L, what, ar, cl, ci);
+  if (strchr(what, 'f')) {
+    setobj2s(L, L->top.p, func);
+    api_incr_top(L);
+  }
+  if (strchr(what, 'L'))
+    collectvalidlines(L, cl);
+  lua_unlock(L);
+  return status;
+}
+
+
+/*
+** {======================================================
+** Symbolic Execution
+** =======================================================
+*/
+
+
+static int filterpc (int pc, int jmptarget) {
+  if (pc < jmptarget)  /* is code conditional (inside a jump)? */
+    return -1;  /* cannot know who sets that register */
+  else return pc;  /* current position sets that register */
+}
+
+
+/*
+** Try to find last instruction before 'lastpc' that modified register 'reg'.
+*/
+static int findsetreg (const Proto *p, int lastpc, int reg) {
+  int pc;
+  int setreg = -1;  /* keep last instruction that changed 'reg' */
+  int jmptarget = 0;  /* any code before this address is conditional */
+  if (testMMMode(GET_OPCODE(p->code[lastpc])))
+    lastpc--;  /* previous instruction was not actually executed */
+  for (pc = 0; pc < lastpc; pc++) {
+    Instruction i = p->code[pc];
+    OpCode op = GET_OPCODE(i);
+    int a = GETARG_A(i);
+    int change;  /* true if current instruction changed 'reg' */
+    switch (op) {
+      case OP_LOADNIL: {  /* set registers from 'a' to 'a+b' */
+        int b = GETARG_B(i);
+        change = (a <= reg && reg <= a + b);
+        break;
+      }
+      case OP_TFORCALL: {  /* affect all regs above its base */
+        change = (reg >= a + 2);
+        break;
+      }
+      case OP_CALL:
+      case OP_TAILCALL: {  /* affect all registers above base */
+        change = (reg >= a);
+        break;
+      }
+      case OP_JMP: {  /* doesn't change registers, but changes 'jmptarget' */
+        int b = GETARG_sJ(i);
+        int dest = pc + 1 + b;
+        /* jump does not skip 'lastpc' and is larger than current one? */
+        if (dest <= lastpc && dest > jmptarget)
+          jmptarget = dest;  /* update 'jmptarget' */
+        change = 0;
+        break;
+      }
+      default:  /* any instruction that sets A */
+        change = (testAMode(op) && reg == a);
+        break;
+    }
+    if (change)
+      setreg = filterpc(pc, jmptarget);
+  }
+  return setreg;
+}
+
+
+/*
+** Find a "name" for the constant 'c'.
+*/
+static const char *kname (const Proto *p, int index, const char **name) {
+  TValue *kvalue = &p->k[index];
+  if (ttisstring(kvalue)) {
+    *name = getstr(tsvalue(kvalue));
+    return "constant";
+  }
+  else {
+    *name = "?";
+    return NULL;
+  }
+}
+
+
+static const char *basicgetobjname (const Proto *p, int *ppc, int reg,
+                                    const char **name) {
+  int pc = *ppc;
+  *name = luaF_getlocalname(p, reg + 1, pc);
+  if (*name)  /* is a local? */
+    return "local";
+  /* else try symbolic execution */
+  *ppc = pc = findsetreg(p, pc, reg);
+  if (pc != -1) {  /* could find instruction? */
+    Instruction i = p->code[pc];
+    OpCode op = GET_OPCODE(i);
+    switch (op) {
+      case OP_MOVE: {
+        int b = GETARG_B(i);  /* move from 'b' to 'a' */
+        if (b < GETARG_A(i))
+          return basicgetobjname(p, ppc, b, name);  /* get name for 'b' */
+        break;
+      }
+      case OP_GETUPVAL: {
+        *name = upvalname(p, GETARG_B(i));
+        return "upvalue";
+      }
+      case OP_LOADK: return kname(p, GETARG_Bx(i), name);
+      case OP_LOADKX: return kname(p, GETARG_Ax(p->code[pc + 1]), name);
+      default: break;
+    }
+  }
+  return NULL;  /* could not find reasonable name */
+}
+
+
+/*
+** Find a "name" for the register 'c'.
+*/
+static void rname (const Proto *p, int pc, int c, const char **name) {
+  const char *what = basicgetobjname(p, &pc, c, name); /* search for 'c' */
+  if (!(what && *what == 'c'))  /* did not find a constant name? */
+    *name = "?";
+}
+
+
+/*
+** Find a "name" for a 'C' value in an RK instruction.
+*/
+static void rkname (const Proto *p, int pc, Instruction i, const char **name) {
+  int c = GETARG_C(i);  /* key index */
+  if (GETARG_k(i))  /* is 'c' a constant? */
+    kname(p, c, name);
+  else  /* 'c' is a register */
+    rname(p, pc, c, name);
+}
+
+
+/*
+** Check whether table being indexed by instruction 'i' is the
+** environment '_ENV'
+*/
+static const char *isEnv (const Proto *p, int pc, Instruction i, int isup) {
+  int t = GETARG_B(i);  /* table index */
+  const char *name;  /* name of indexed variable */
+  if (isup)  /* is 't' an upvalue? */
+    name = upvalname(p, t);
+  else  /* 't' is a register */
+    basicgetobjname(p, &pc, t, &name);
+  return (name && strcmp(name, LUA_ENV) == 0) ? "global" : "field";
+}
+
+
+/*
+** Extend 'basicgetobjname' to handle table accesses
+*/
+static const char *getobjname (const Proto *p, int lastpc, int reg,
+                               const char **name) {
+  const char *kind = basicgetobjname(p, &lastpc, reg, name);
+  if (kind != NULL)
+    return kind;
+  else if (lastpc != -1) {  /* could find instruction? */
+    Instruction i = p->code[lastpc];
+    OpCode op = GET_OPCODE(i);
+    switch (op) {
+      case OP_GETTABUP: {
+        int k = GETARG_C(i);  /* key index */
+        kname(p, k, name);
+        return isEnv(p, lastpc, i, 1);
+      }
+      case OP_GETTABLE: {
+        int k = GETARG_C(i);  /* key index */
+        rname(p, lastpc, k, name);
+        return isEnv(p, lastpc, i, 0);
+      }
+      case OP_GETI: {
+        *name = "integer index";
+        return "field";
+      }
+      case OP_GETFIELD: {
+        int k = GETARG_C(i);  /* key index */
+        kname(p, k, name);
+        return isEnv(p, lastpc, i, 0);
+      }
+      case OP_SELF: {
+        rkname(p, lastpc, i, name);
+        return "method";
+      }
+      default: break;  /* go through to return NULL */
+    }
+  }
+  return NULL;  /* could not find reasonable name */
+}
+
+
+/*
+** Try to find a name for a function based on the code that called it.
+** (Only works when function was called by a Lua function.)
+** Returns what the name is (e.g., "for iterator", "method",
+** "metamethod") and sets '*name' to point to the name.
+*/
+static const char *funcnamefromcode (lua_State *L, const Proto *p,
+                                     int pc, const char **name) {
+  TMS tm = (TMS)0;  /* (initial value avoids warnings) */
+  Instruction i = p->code[pc];  /* calling instruction */
+  switch (GET_OPCODE(i)) {
+    case OP_CALL:
+    case OP_TAILCALL:
+      return getobjname(p, pc, GETARG_A(i), name);  /* get function name */
+    case OP_TFORCALL: {  /* for iterator */
+      *name = "for iterator";
+       return "for iterator";
+    }
+    /* other instructions can do calls through metamethods */
+    case OP_SELF: case OP_GETTABUP: case OP_GETTABLE:
+    case OP_GETI: case OP_GETFIELD:
+      tm = TM_INDEX;
+      break;
+    case OP_SETTABUP: case OP_SETTABLE: case OP_SETI: case OP_SETFIELD:
+      tm = TM_NEWINDEX;
+      break;
+    case OP_MMBIN: case OP_MMBINI: case OP_MMBINK: {
+      tm = cast(TMS, GETARG_C(i));
+      break;
+    }
+    case OP_UNM: tm = TM_UNM; break;
+    case OP_BNOT: tm = TM_BNOT; break;
+    case OP_LEN: tm = TM_LEN; break;
+    case OP_CONCAT: tm = TM_CONCAT; break;
+    case OP_EQ: tm = TM_EQ; break;
+    /* no cases for OP_EQI and OP_EQK, as they don't call metamethods */
+    case OP_LT: case OP_LTI: case OP_GTI: tm = TM_LT; break;
+    case OP_LE: case OP_LEI: case OP_GEI: tm = TM_LE; break;
+    case OP_CLOSE: case OP_RETURN: tm = TM_CLOSE; break;
+    default:
+      return NULL;  /* cannot find a reasonable name */
+  }
+  *name = getshrstr(G(L)->tmname[tm]) + 2;
+  return "metamethod";
+}
+
+
+/*
+** Try to find a name for a function based on how it was called.
+*/
+static const char *funcnamefromcall (lua_State *L, CallInfo *ci,
+                                                   const char **name) {
+  if (ci->callstatus & CIST_HOOKED) {  /* was it called inside a hook? */
+    *name = "?";
+    return "hook";
+  }
+  else if (ci->callstatus & CIST_FIN) {  /* was it called as a finalizer? */
+    *name = "__gc";
+    return "metamethod";  /* report it as such */
+  }
+  else if (isLua(ci))
+    return funcnamefromcode(L, ci_func(ci)->p, currentpc(ci), name);
+  else
+    return NULL;
+}
+
+/* }====================================================== */
+
+
+
+/*
+** Check whether pointer 'o' points to some value in the stack frame of
+** the current function and, if so, returns its index.  Because 'o' may
+** not point to a value in this stack, we cannot compare it with the
+** region boundaries (undefined behavior in ISO C).
+*/
+static int instack (CallInfo *ci, const TValue *o) {
+  int pos;
+  StkId base = ci->func.p + 1;
+  for (pos = 0; base + pos < ci->top.p; pos++) {
+    if (o == s2v(base + pos))
+      return pos;
+  }
+  return -1;  /* not found */
+}
+
+
+/*
+** Checks whether value 'o' came from an upvalue. (That can only happen
+** with instructions OP_GETTABUP/OP_SETTABUP, which operate directly on
+** upvalues.)
+*/
+static const char *getupvalname (CallInfo *ci, const TValue *o,
+                                 const char **name) {
+  LClosure *c = ci_func(ci);
+  int i;
+  for (i = 0; i < c->nupvalues; i++) {
+    if (c->upvals[i]->v.p == o) {
+      *name = upvalname(c->p, i);
+      return "upvalue";
+    }
+  }
+  return NULL;
+}
+
+
+static const char *formatvarinfo (lua_State *L, const char *kind,
+                                                const char *name) {
+  if (kind == NULL)
+    return "";  /* no information */
+  else
+    return luaO_pushfstring(L, " (%s '%s')", kind, name);
+}
+
+/*
+** Build a string with a "description" for the value 'o', such as
+** "variable 'x'" or "upvalue 'y'".
+*/
+static const char *varinfo (lua_State *L, const TValue *o) {
+  CallInfo *ci = L->ci;
+  const char *name = NULL;  /* to avoid warnings */
+  const char *kind = NULL;
+  if (isLua(ci)) {
+    kind = getupvalname(ci, o, &name);  /* check whether 'o' is an upvalue */
+    if (!kind) {  /* not an upvalue? */
+      int reg = instack(ci, o);  /* try a register */
+      if (reg >= 0)  /* is 'o' a register? */
+        kind = getobjname(ci_func(ci)->p, currentpc(ci), reg, &name);
+    }
+  }
+  return formatvarinfo(L, kind, name);
+}
+
+
+/*
+** Raise a type error
+*/
+static l_noret typeerror (lua_State *L, const TValue *o, const char *op,
+                          const char *extra) {
+  const char *t = luaT_objtypename(L, o);
+  luaG_runerror(L, "attempt to %s a %s value%s", op, t, extra);
+}
+
+
+/*
+** Raise a type error with "standard" information about the faulty
+** object 'o' (using 'varinfo').
+*/
+l_noret luaG_typeerror (lua_State *L, const TValue *o, const char *op) {
+  typeerror(L, o, op, varinfo(L, o));
+}
+
+
+/*
+** Raise an error for calling a non-callable object. Try to find a name
+** for the object based on how it was called ('funcnamefromcall'); if it
+** cannot get a name there, try 'varinfo'.
+*/
+l_noret luaG_callerror (lua_State *L, const TValue *o) {
+  CallInfo *ci = L->ci;
+  const char *name = NULL;  /* to avoid warnings */
+  const char *kind = funcnamefromcall(L, ci, &name);
+  const char *extra = kind ? formatvarinfo(L, kind, name) : varinfo(L, o);
+  typeerror(L, o, "call", extra);
+}
+
+
+l_noret luaG_forerror (lua_State *L, const TValue *o, const char *what) {
+  luaG_runerror(L, "bad 'for' %s (number expected, got %s)",
+                   what, luaT_objtypename(L, o));
+}
+
+
+l_noret luaG_concaterror (lua_State *L, const TValue *p1, const TValue *p2) {
+  if (ttisstring(p1) || cvt2str(p1)) p1 = p2;
+  luaG_typeerror(L, p1, "concatenate");
+}
+
+
+l_noret luaG_opinterror (lua_State *L, const TValue *p1,
+                         const TValue *p2, const char *msg) {
+  if (!ttisnumber(p1))  /* first operand is wrong? */
+    p2 = p1;  /* now second is wrong */
+  luaG_typeerror(L, p2, msg);
+}
+
+
+/*
+** Error when both values are convertible to numbers, but not to integers
+*/
+l_noret luaG_tointerror (lua_State *L, const TValue *p1, const TValue *p2) {
+  lua_Integer temp;
+  if (!luaV_tointegerns(p1, &temp, LUA_FLOORN2I))
+    p2 = p1;
+  luaG_runerror(L, "number%s has no integer representation", varinfo(L, p2));
+}
+
+
+l_noret luaG_ordererror (lua_State *L, const TValue *p1, const TValue *p2) {
+  const char *t1 = luaT_objtypename(L, p1);
+  const char *t2 = luaT_objtypename(L, p2);
+  if (strcmp(t1, t2) == 0)
+    luaG_runerror(L, "attempt to compare two %s values", t1);
+  else
+    luaG_runerror(L, "attempt to compare %s with %s", t1, t2);
+}
+
+
+/* add src:line information to 'msg' */
+const char *luaG_addinfo (lua_State *L, const char *msg, TString *src,
+                                        int line) {
+  char buff[LUA_IDSIZE];
+  if (src)
+    luaO_chunkid(buff, getstr(src), tsslen(src));
+  else {  /* no source available; use "?" instead */
+    buff[0] = '?'; buff[1] = '\0';
+  }
+  return luaO_pushfstring(L, "%s:%d: %s", buff, line, msg);
+}
+
+
+l_noret luaG_errormsg (lua_State *L) {
+  if (L->errfunc != 0) {  /* is there an error handling function? */
+    StkId errfunc = restorestack(L, L->errfunc);
+    lua_assert(ttisfunction(s2v(errfunc)));
+    setobjs2s(L, L->top.p, L->top.p - 1);  /* move argument */
+    setobjs2s(L, L->top.p - 1, errfunc);  /* push function */
+    L->top.p++;  /* assume EXTRA_STACK */
+    luaD_callnoyield(L, L->top.p - 2, 1);  /* call it */
+  }
+  luaD_throw(L, LUA_ERRRUN);
+}
+
+
+l_noret luaG_runerror (lua_State *L, const char *fmt, ...) {
+  CallInfo *ci = L->ci;
+  const char *msg;
+  va_list argp;
+  luaC_checkGC(L);  /* error message uses memory */
+  va_start(argp, fmt);
+  msg = luaO_pushvfstring(L, fmt, argp);  /* format message */
+  va_end(argp);
+  if (isLua(ci)) {  /* if Lua function, add source:line information */
+    luaG_addinfo(L, msg, ci_func(ci)->p->source, getcurrentline(ci));
+    setobjs2s(L, L->top.p - 2, L->top.p - 1);  /* remove 'msg' */
+    L->top.p--;
+  }
+  luaG_errormsg(L);
+}
+
+
+/*
+** Check whether new instruction 'newpc' is in a different line from
+** previous instruction 'oldpc'. More often than not, 'newpc' is only
+** one or a few instructions after 'oldpc' (it must be after, see
+** caller), so try to avoid calling 'luaG_getfuncline'. If they are
+** too far apart, there is a good chance of a ABSLINEINFO in the way,
+** so it goes directly to 'luaG_getfuncline'.
+*/
+static int changedline (const Proto *p, int oldpc, int newpc) {
+  if (p->lineinfo == NULL)  /* no debug information? */
+    return 0;
+  if (newpc - oldpc < MAXIWTHABS / 2) {  /* not too far apart? */
+    int delta = 0;  /* line difference */
+    int pc = oldpc;
+    for (;;) {
+      int lineinfo = p->lineinfo[++pc];
+      if (lineinfo == ABSLINEINFO)
+        break;  /* cannot compute delta; fall through */
+      delta += lineinfo;
+      if (pc == newpc)
+        return (delta != 0);  /* delta computed successfully */
+    }
+  }
+  /* either instructions are too far apart or there is an absolute line
+     info in the way; compute line difference explicitly */
+  return (luaG_getfuncline(p, oldpc) != luaG_getfuncline(p, newpc));
+}
+
+
+/*
+** Traces Lua calls. If code is running the first instruction of a function,
+** and function is not vararg, and it is not coming from an yield,
+** calls 'luaD_hookcall'. (Vararg functions will call 'luaD_hookcall'
+** after adjusting its variable arguments; otherwise, they could call
+** a line/count hook before the call hook. Functions coming from
+** an yield already called 'luaD_hookcall' before yielding.)
+*/
+int luaG_tracecall (lua_State *L) {
+  CallInfo *ci = L->ci;
+  Proto *p = ci_func(ci)->p;
+  ci->u.l.trap = 1;  /* ensure hooks will be checked */
+  if (ci->u.l.savedpc == p->code) {  /* first instruction (not resuming)? */
+    if (p->is_vararg)
+      return 0;  /* hooks will start at VARARGPREP instruction */
+    else if (!(ci->callstatus & CIST_HOOKYIELD))  /* not yieded? */
+      luaD_hookcall(L, ci);  /* check 'call' hook */
+  }
+  return 1;  /* keep 'trap' on */
+}
+
+
+/*
+** Traces the execution of a Lua function. Called before the execution
+** of each opcode, when debug is on. 'L->oldpc' stores the last
+** instruction traced, to detect line changes. When entering a new
+** function, 'npci' will be zero and will test as a new line whatever
+** the value of 'oldpc'.  Some exceptional conditions may return to
+** a function without setting 'oldpc'. In that case, 'oldpc' may be
+** invalid; if so, use zero as a valid value. (A wrong but valid 'oldpc'
+** at most causes an extra call to a line hook.)
+** This function is not "Protected" when called, so it should correct
+** 'L->top.p' before calling anything that can run the GC.
+*/
+int luaG_traceexec (lua_State *L, const Instruction *pc) {
+  CallInfo *ci = L->ci;
+  lu_byte mask = L->hookmask;
+  const Proto *p = ci_func(ci)->p;
+  int counthook;
+  if (!(mask & (LUA_MASKLINE | LUA_MASKCOUNT))) {  /* no hooks? */
+    ci->u.l.trap = 0;  /* don't need to stop again */
+    return 0;  /* turn off 'trap' */
+  }
+  pc++;  /* reference is always next instruction */
+  ci->u.l.savedpc = pc;  /* save 'pc' */
+  counthook = (mask & LUA_MASKCOUNT) && (--L->hookcount == 0);
+  if (counthook)
+    resethookcount(L);  /* reset count */
+  else if (!(mask & LUA_MASKLINE))
+    return 1;  /* no line hook and count != 0; nothing to be done now */
+  if (ci->callstatus & CIST_HOOKYIELD) {  /* hook yielded last time? */
+    ci->callstatus &= ~CIST_HOOKYIELD;  /* erase mark */
+    return 1;  /* do not call hook again (VM yielded, so it did not move) */
+  }
+  if (!isIT(*(ci->u.l.savedpc - 1)))  /* top not being used? */
+    L->top.p = ci->top.p;  /* correct top */
+  if (counthook)
+    luaD_hook(L, LUA_HOOKCOUNT, -1, 0, 0);  /* call count hook */
+  if (mask & LUA_MASKLINE) {
+    /* 'L->oldpc' may be invalid; use zero in this case */
+    int oldpc = (L->oldpc < p->sizecode) ? L->oldpc : 0;
+    int npci = pcRel(pc, p);
+    if (npci <= oldpc ||  /* call hook when jump back (loop), */
+        changedline(p, oldpc, npci)) {  /* or when enter new line */
+      int newline = luaG_getfuncline(p, npci);
+      luaD_hook(L, LUA_HOOKLINE, newline, 0, 0);  /* call line hook */
+    }
+    L->oldpc = npci;  /* 'pc' of last call to line hook */
+  }
+  if (L->status == LUA_YIELD) {  /* did hook yield? */
+    if (counthook)
+      L->hookcount = 1;  /* undo decrement to zero */
+    ci->callstatus |= CIST_HOOKYIELD;  /* mark that it yielded */
+    luaD_throw(L, LUA_YIELD);
+  }
+  return 1;  /* keep 'trap' on */
+}
+
@@ -0,0 +1,64 @@
+/*
+** $Id: ldebug.h $
+** Auxiliary functions from Debug Interface module
+** See Copyright Notice in lua.h
+*/
+
+#ifndef ldebug_h
+#define ldebug_h
+
+
+#include "lstate.h"
+
+
+#define pcRel(pc, p)	(cast_int((pc) - (p)->code) - 1)
+
+
+/* Active Lua function (given call info) */
+#define ci_func(ci)		(clLvalue(s2v((ci)->func.p)))
+
+
+#define resethookcount(L)	(L->hookcount = L->basehookcount)
+
+/*
+** mark for entries in 'lineinfo' array that has absolute information in
+** 'abslineinfo' array
+*/
+#define ABSLINEINFO	(-0x80)
+
+
+/*
+** MAXimum number of successive Instructions WiTHout ABSolute line
+** information. (A power of two allows fast divisions.)
+*/
+#if !defined(MAXIWTHABS)
+#define MAXIWTHABS	128
+#endif
+
+
+LUAI_FUNC int luaG_getfuncline (const Proto *f, int pc);
+LUAI_FUNC const char *luaG_findlocal (lua_State *L, CallInfo *ci, int n,
+                                                    StkId *pos);
+LUAI_FUNC l_noret luaG_typeerror (lua_State *L, const TValue *o,
+                                                const char *opname);
+LUAI_FUNC l_noret luaG_callerror (lua_State *L, const TValue *o);
+LUAI_FUNC l_noret luaG_forerror (lua_State *L, const TValue *o,
+                                               const char *what);
+LUAI_FUNC l_noret luaG_concaterror (lua_State *L, const TValue *p1,
+                                                  const TValue *p2);
+LUAI_FUNC l_noret luaG_opinterror (lua_State *L, const TValue *p1,
+                                                 const TValue *p2,
+                                                 const char *msg);
+LUAI_FUNC l_noret luaG_tointerror (lua_State *L, const TValue *p1,
+                                                 const TValue *p2);
+LUAI_FUNC l_noret luaG_ordererror (lua_State *L, const TValue *p1,
+                                                 const TValue *p2);
+LUAI_FUNC l_noret luaG_runerror (lua_State *L, const char *fmt, ...);
+LUAI_FUNC const char *luaG_addinfo (lua_State *L, const char *msg,
+                                                  TString *src, int line);
+LUAI_FUNC l_noret luaG_errormsg (lua_State *L);
+LUAI_FUNC int luaG_traceexec (lua_State *L, const Instruction *pc);
+LUAI_FUNC int luaG_tracecall (lua_State *L);
+
+
+#endif
@@ -0,0 +1,87 @@
+/*
+** $Id: ldo.h $
+** Stack and Call structure of Lua
+** See Copyright Notice in lua.h
+*/
+
+#ifndef ldo_h
+#define ldo_h
+
+
+#include "llimits.h"
+#include "lobject.h"
+#include "lstate.h"
+#include "lzio.h"
+
+
+/*
+** Macro to check stack size and grow stack if needed.  Parameters
+** 'pre'/'pos' allow the macro to preserve a pointer into the
+** stack across reallocations, doing the work only when needed.
+** It also allows the running of one GC step when the stack is
+** reallocated.
+** 'condmovestack' is used in heavy tests to force a stack reallocation
+** at every check.
+*/
+#define luaD_checkstackaux(L,n,pre,pos)  \
+	if (l_unlikely(L->stack_last.p - L->top.p <= (n))) \
+	  { pre; luaD_growstack(L, n, 1); pos; } \
+        else { condmovestack(L,pre,pos); }
+
+/* In general, 'pre'/'pos' are empty (nothing to save) */
+#define luaD_checkstack(L,n)	luaD_checkstackaux(L,n,(void)0,(void)0)
+
+
+
+#define savestack(L,pt)		(cast_charp(pt) - cast_charp(L->stack.p))
+#define restorestack(L,n)	cast(StkId, cast_charp(L->stack.p) + (n))
+
+
+/* macro to check stack size, preserving 'p' */
+#define checkstackp(L,n,p)  \
+  luaD_checkstackaux(L, n, \
+    ptrdiff_t t__ = savestack(L, p),  /* save 'p' */ \
+    p = restorestack(L, t__))  /* 'pos' part: restore 'p' */
+
+
+/* macro to check stack size and GC, preserving 'p' */
+#define checkstackGCp(L,n,p)  \
+  luaD_checkstackaux(L, n, \
+    ptrdiff_t t__ = savestack(L, p);  /* save 'p' */ \
+    luaC_checkGC(L),  /* stack grow uses memory */ \
+    p = restorestack(L, t__))  /* 'pos' part: restore 'p' */
+
+
+/* macro to check stack size and GC */
+#define checkstackGC(L,fsize)  \
+	luaD_checkstackaux(L, (fsize), luaC_checkGC(L), (void)0)
+
+
+/* type of protected functions, to be ran by 'runprotected' */
+typedef void (*Pfunc) (lua_State *L, void *ud);
+
+LUAI_FUNC void luaD_seterrorobj (lua_State *L, int errcode, StkId oldtop);
+LUAI_FUNC int luaD_protectedparser (lua_State *L, ZIO *z, const char *name,
+                                                  const char *mode);
+LUAI_FUNC void luaD_hook (lua_State *L, int event, int line,
+                                        int fTransfer, int nTransfer);
+LUAI_FUNC void luaD_hookcall (lua_State *L, CallInfo *ci);
+LUAI_FUNC int luaD_pretailcall (lua_State *L, CallInfo *ci, StkId func,
+                                              int narg1, int delta);
+LUAI_FUNC CallInfo *luaD_precall (lua_State *L, StkId func, int nResults);
+LUAI_FUNC void luaD_call (lua_State *L, StkId func, int nResults);
+LUAI_FUNC void luaD_callnoyield (lua_State *L, StkId func, int nResults);
+LUAI_FUNC int luaD_closeprotected (lua_State *L, ptrdiff_t level, int status);
+LUAI_FUNC int luaD_pcall (lua_State *L, Pfunc func, void *u,
+                                        ptrdiff_t oldtop, ptrdiff_t ef);
+LUAI_FUNC void luaD_poscall (lua_State *L, CallInfo *ci, int nres);
+LUAI_FUNC int luaD_reallocstack (lua_State *L, int newsize, int raiseerror);
+LUAI_FUNC int luaD_growstack (lua_State *L, int n, int raiseerror);
+LUAI_FUNC void luaD_shrinkstack (lua_State *L);
+LUAI_FUNC void luaD_inctop (lua_State *L);
+
+LUAI_FUNC l_noret luaD_throw (lua_State *L, int errcode);
+LUAI_FUNC int luaD_rawrunprotected (lua_State *L, Pfunc f, void *ud);
+
+#endif
+
@@ -0,0 +1,230 @@
+/*
+** $Id: ldump.c $
+** save precompiled Lua chunks
+** See Copyright Notice in lua.h
+*/
+
+#define ldump_c
+#define LUA_CORE
+
+#include "lprefix.h"
+
+
+#include <limits.h>
+#include <stddef.h>
+
+#include "lua.h"
+
+#include "lobject.h"
+#include "lstate.h"
+#include "lundump.h"
+
+
+typedef struct {
+  lua_State *L;
+  lua_Writer writer;
+  void *data;
+  int strip;
+  int status;
+} DumpState;
+
+
+/*
+** All high-level dumps go through dumpVector; you can change it to
+** change the endianness of the result
+*/
+#define dumpVector(D,v,n)	dumpBlock(D,v,(n)*sizeof((v)[0]))
+
+#define dumpLiteral(D, s)	dumpBlock(D,s,sizeof(s) - sizeof(char))
+
+
+static void dumpBlock (DumpState *D, const void *b, size_t size) {
+  if (D->status == 0 && size > 0) {
+    lua_unlock(D->L);
+    D->status = (*D->writer)(D->L, b, size, D->data);
+    lua_lock(D->L);
+  }
+}
+
+
+#define dumpVar(D,x)		dumpVector(D,&x,1)
+
+
+static void dumpByte (DumpState *D, int y) {
+  lu_byte x = (lu_byte)y;
+  dumpVar(D, x);
+}
+
+
+/*
+** 'dumpSize' buffer size: each byte can store up to 7 bits. (The "+6"
+** rounds up the division.)
+*/
+#define DIBS    ((sizeof(size_t) * CHAR_BIT + 6) / 7)
+
+static void dumpSize (DumpState *D, size_t x) {
+  lu_byte buff[DIBS];
+  int n = 0;
+  do {
+    buff[DIBS - (++n)] = x & 0x7f;  /* fill buffer in reverse order */
+    x >>= 7;
+  } while (x != 0);
+  buff[DIBS - 1] |= 0x80;  /* mark last byte */
+  dumpVector(D, buff + DIBS - n, n);
+}
+
+
+static void dumpInt (DumpState *D, int x) {
+  dumpSize(D, x);
+}
+
+
+static void dumpNumber (DumpState *D, lua_Number x) {
+  dumpVar(D, x);
+}
+
+
+static void dumpInteger (DumpState *D, lua_Integer x) {
+  dumpVar(D, x);
+}
+
+
+static void dumpString (DumpState *D, const TString *s) {
+  if (s == NULL)
+    dumpSize(D, 0);
+  else {
+    size_t size = tsslen(s);
+    const char *str = getstr(s);
+    dumpSize(D, size + 1);
+    dumpVector(D, str, size);
+  }
+}
+
+
+static void dumpCode (DumpState *D, const Proto *f) {
+  dumpInt(D, f->sizecode);
+  dumpVector(D, f->code, f->sizecode);
+}
+
+
+static void dumpFunction(DumpState *D, const Proto *f, TString *psource);
+
+static void dumpConstants (DumpState *D, const Proto *f) {
+  int i;
+  int n = f->sizek;
+  dumpInt(D, n);
+  for (i = 0; i < n; i++) {
+    const TValue *o = &f->k[i];
+    int tt = ttypetag(o);
+    dumpByte(D, tt);
+    switch (tt) {
+      case LUA_VNUMFLT:
+        dumpNumber(D, fltvalue(o));
+        break;
+      case LUA_VNUMINT:
+        dumpInteger(D, ivalue(o));
+        break;
+      case LUA_VSHRSTR:
+      case LUA_VLNGSTR:
+        dumpString(D, tsvalue(o));
+        break;
+      default:
+        lua_assert(tt == LUA_VNIL || tt == LUA_VFALSE || tt == LUA_VTRUE);
+    }
+  }
+}
+
+
+static void dumpProtos (DumpState *D, const Proto *f) {
+  int i;
+  int n = f->sizep;
+  dumpInt(D, n);
+  for (i = 0; i < n; i++)
+    dumpFunction(D, f->p[i], f->source);
+}
+
+
+static void dumpUpvalues (DumpState *D, const Proto *f) {
+  int i, n = f->sizeupvalues;
+  dumpInt(D, n);
+  for (i = 0; i < n; i++) {
+    dumpByte(D, f->upvalues[i].instack);
+    dumpByte(D, f->upvalues[i].idx);
+    dumpByte(D, f->upvalues[i].kind);
+  }
+}
+
+
+static void dumpDebug (DumpState *D, const Proto *f) {
+  int i, n;
+  n = (D->strip) ? 0 : f->sizelineinfo;
+  dumpInt(D, n);
+  dumpVector(D, f->lineinfo, n);
+  n = (D->strip) ? 0 : f->sizeabslineinfo;
+  dumpInt(D, n);
+  for (i = 0; i < n; i++) {
+    dumpInt(D, f->abslineinfo[i].pc);
+    dumpInt(D, f->abslineinfo[i].line);
+  }
+  n = (D->strip) ? 0 : f->sizelocvars;
+  dumpInt(D, n);
+  for (i = 0; i < n; i++) {
+    dumpString(D, f->locvars[i].varname);
+    dumpInt(D, f->locvars[i].startpc);
+    dumpInt(D, f->locvars[i].endpc);
+  }
+  n = (D->strip) ? 0 : f->sizeupvalues;
+  dumpInt(D, n);
+  for (i = 0; i < n; i++)
+    dumpString(D, f->upvalues[i].name);
+}
+
+
+static void dumpFunction (DumpState *D, const Proto *f, TString *psource) {
+  if (D->strip || f->source == psource)
+    dumpString(D, NULL);  /* no debug info or same source as its parent */
+  else
+    dumpString(D, f->source);
+  dumpInt(D, f->linedefined);
+  dumpInt(D, f->lastlinedefined);
+  dumpByte(D, f->numparams);
+  dumpByte(D, f->is_vararg);
+  dumpByte(D, f->maxstacksize);
+  dumpCode(D, f);
+  dumpConstants(D, f);
+  dumpUpvalues(D, f);
+  dumpProtos(D, f);
+  dumpDebug(D, f);
+}
+
+
+static void dumpHeader (DumpState *D) {
+  dumpLiteral(D, LUA_SIGNATURE);
+  dumpByte(D, LUAC_VERSION);
+  dumpByte(D, LUAC_FORMAT);
+  dumpLiteral(D, LUAC_DATA);
+  dumpByte(D, sizeof(Instruction));
+  dumpByte(D, sizeof(lua_Integer));
+  dumpByte(D, sizeof(lua_Number));
+  dumpInteger(D, LUAC_INT);
+  dumpNumber(D, LUAC_NUM);
+}
+
+
+/*
+** dump Lua function as precompiled chunk
+*/
+int luaU_dump(lua_State *L, const Proto *f, lua_Writer w, void *data,
+              int strip) {
+  DumpState D;
+  D.L = L;
+  D.writer = w;
+  D.data = data;
+  D.strip = strip;
+  D.status = 0;
+  dumpHeader(&D);
+  dumpByte(&D, f->sizeupvalues);
+  dumpFunction(&D, f, NULL);
+  return D.status;
+}
+
@@ -0,0 +1,294 @@
+/*
+** $Id: lfunc.c $
+** Auxiliary functions to manipulate prototypes and closures
+** See Copyright Notice in lua.h
+*/
+
+#define lfunc_c
+#define LUA_CORE
+
+#include "lprefix.h"
+
+
+#include <stddef.h>
+
+#include "lua.h"
+
+#include "ldebug.h"
+#include "ldo.h"
+#include "lfunc.h"
+#include "lgc.h"
+#include "lmem.h"
+#include "lobject.h"
+#include "lstate.h"
+
+
+
+CClosure *luaF_newCclosure (lua_State *L, int nupvals) {
+  GCObject *o = luaC_newobj(L, LUA_VCCL, sizeCclosure(nupvals));
+  CClosure *c = gco2ccl(o);
+  c->nupvalues = cast_byte(nupvals);
+  return c;
+}
+
+
+LClosure *luaF_newLclosure (lua_State *L, int nupvals) {
+  GCObject *o = luaC_newobj(L, LUA_VLCL, sizeLclosure(nupvals));
+  LClosure *c = gco2lcl(o);
+  c->p = NULL;
+  c->nupvalues = cast_byte(nupvals);
+  while (nupvals--) c->upvals[nupvals] = NULL;
+  return c;
+}
+
+
+/*
+** fill a closure with new closed upvalues
+*/
+void luaF_initupvals (lua_State *L, LClosure *cl) {
+  int i;
+  for (i = 0; i < cl->nupvalues; i++) {
+    GCObject *o = luaC_newobj(L, LUA_VUPVAL, sizeof(UpVal));
+    UpVal *uv = gco2upv(o);
+    uv->v.p = &uv->u.value;  /* make it closed */
+    setnilvalue(uv->v.p);
+    cl->upvals[i] = uv;
+    luaC_objbarrier(L, cl, uv);
+  }
+}
+
+
+/*
+** Create a new upvalue at the given level, and link it to the list of
+** open upvalues of 'L' after entry 'prev'.
+**/
+static UpVal *newupval (lua_State *L, StkId level, UpVal **prev) {
+  GCObject *o = luaC_newobj(L, LUA_VUPVAL, sizeof(UpVal));
+  UpVal *uv = gco2upv(o);
+  UpVal *next = *prev;
+  uv->v.p = s2v(level);  /* current value lives in the stack */
+  uv->u.open.next = next;  /* link it to list of open upvalues */
+  uv->u.open.previous = prev;
+  if (next)
+    next->u.open.previous = &uv->u.open.next;
+  *prev = uv;
+  if (!isintwups(L)) {  /* thread not in list of threads with upvalues? */
+    L->twups = G(L)->twups;  /* link it to the list */
+    G(L)->twups = L;
+  }
+  return uv;
+}
+
+
+/*
+** Find and reuse, or create if it does not exist, an upvalue
+** at the given level.
+*/
+UpVal *luaF_findupval (lua_State *L, StkId level) {
+  UpVal **pp = &L->openupval;
+  UpVal *p;
+  lua_assert(isintwups(L) || L->openupval == NULL);
+  while ((p = *pp) != NULL && uplevel(p) >= level) {  /* search for it */
+    lua_assert(!isdead(G(L), p));
+    if (uplevel(p) == level)  /* corresponding upvalue? */
+      return p;  /* return it */
+    pp = &p->u.open.next;
+  }
+  /* not found: create a new upvalue after 'pp' */
+  return newupval(L, level, pp);
+}
+
+
+/*
+** Call closing method for object 'obj' with error message 'err'. The
+** boolean 'yy' controls whether the call is yieldable.
+** (This function assumes EXTRA_STACK.)
+*/
+static void callclosemethod (lua_State *L, TValue *obj, TValue *err, int yy) {
+  StkId top = L->top.p;
+  const TValue *tm = luaT_gettmbyobj(L, obj, TM_CLOSE);
+  setobj2s(L, top, tm);  /* will call metamethod... */
+  setobj2s(L, top + 1, obj);  /* with 'self' as the 1st argument */
+  setobj2s(L, top + 2, err);  /* and error msg. as 2nd argument */
+  L->top.p = top + 3;  /* add function and arguments */
+  if (yy)
+    luaD_call(L, top, 0);
+  else
+    luaD_callnoyield(L, top, 0);
+}
+
+
+/*
+** Check whether object at given level has a close metamethod and raise
+** an error if not.
+*/
+static void checkclosemth (lua_State *L, StkId level) {
+  const TValue *tm = luaT_gettmbyobj(L, s2v(level), TM_CLOSE);
+  if (ttisnil(tm)) {  /* no metamethod? */
+    int idx = cast_int(level - L->ci->func.p);  /* variable index */
+    const char *vname = luaG_findlocal(L, L->ci, idx, NULL);
+    if (vname == NULL) vname = "?";
+    luaG_runerror(L, "variable '%s' got a non-closable value", vname);
+  }
+}
+
+
+/*
+** Prepare and call a closing method.
+** If status is CLOSEKTOP, the call to the closing method will be pushed
+** at the top of the stack. Otherwise, values can be pushed right after
+** the 'level' of the upvalue being closed, as everything after that
+** won't be used again.
+*/
+static void prepcallclosemth (lua_State *L, StkId level, int status, int yy) {
+  TValue *uv = s2v(level);  /* value being closed */
+  TValue *errobj;
+  if (status == CLOSEKTOP)
+    errobj = &G(L)->nilvalue;  /* error object is nil */
+  else {  /* 'luaD_seterrorobj' will set top to level + 2 */
+    errobj = s2v(level + 1);  /* error object goes after 'uv' */
+    luaD_seterrorobj(L, status, level + 1);  /* set error object */
+  }
+  callclosemethod(L, uv, errobj, yy);
+}
+
+
+/*
+** Maximum value for deltas in 'tbclist', dependent on the type
+** of delta. (This macro assumes that an 'L' is in scope where it
+** is used.)
+*/
+#define MAXDELTA  \
+	((256ul << ((sizeof(L->stack.p->tbclist.delta) - 1) * 8)) - 1)
+
+
+/*
+** Insert a variable in the list of to-be-closed variables.
+*/
+void luaF_newtbcupval (lua_State *L, StkId level) {
+  lua_assert(level > L->tbclist.p);
+  if (l_isfalse(s2v(level)))
+    return;  /* false doesn't need to be closed */
+  checkclosemth(L, level);  /* value must have a close method */
+  while (cast_uint(level - L->tbclist.p) > MAXDELTA) {
+    L->tbclist.p += MAXDELTA;  /* create a dummy node at maximum delta */
+    L->tbclist.p->tbclist.delta = 0;
+  }
+  level->tbclist.delta = cast(unsigned short, level - L->tbclist.p);
+  L->tbclist.p = level;
+}
+
+
+void luaF_unlinkupval (UpVal *uv) {
+  lua_assert(upisopen(uv));
+  *uv->u.open.previous = uv->u.open.next;
+  if (uv->u.open.next)
+    uv->u.open.next->u.open.previous = uv->u.open.previous;
+}
+
+
+/*
+** Close all upvalues up to the given stack level.
+*/
+void luaF_closeupval (lua_State *L, StkId level) {
+  UpVal *uv;
+  StkId upl;  /* stack index pointed by 'uv' */
+  while ((uv = L->openupval) != NULL && (upl = uplevel(uv)) >= level) {
+    TValue *slot = &uv->u.value;  /* new position for value */
+    lua_assert(uplevel(uv) < L->top.p);
+    luaF_unlinkupval(uv);  /* remove upvalue from 'openupval' list */
+    setobj(L, slot, uv->v.p);  /* move value to upvalue slot */
+    uv->v.p = slot;  /* now current value lives here */
+    if (!iswhite(uv)) {  /* neither white nor dead? */
+      nw2black(uv);  /* closed upvalues cannot be gray */
+      luaC_barrier(L, uv, slot);
+    }
+  }
+}
+
+
+/*
+** Remove first element from the tbclist plus its dummy nodes.
+*/
+static void poptbclist (lua_State *L) {
+  StkId tbc = L->tbclist.p;
+  lua_assert(tbc->tbclist.delta > 0);  /* first element cannot be dummy */
+  tbc -= tbc->tbclist.delta;
+  while (tbc > L->stack.p && tbc->tbclist.delta == 0)
+    tbc -= MAXDELTA;  /* remove dummy nodes */
+  L->tbclist.p = tbc;
+}
+
+
+/*
+** Close all upvalues and to-be-closed variables up to the given stack
+** level. Return restored 'level'.
+*/
+StkId luaF_close (lua_State *L, StkId level, int status, int yy) {
+  ptrdiff_t levelrel = savestack(L, level);
+  luaF_closeupval(L, level);  /* first, close the upvalues */
+  while (L->tbclist.p >= level) {  /* traverse tbc's down to that level */
+    StkId tbc = L->tbclist.p;  /* get variable index */
+    poptbclist(L);  /* remove it from list */
+    prepcallclosemth(L, tbc, status, yy);  /* close variable */
+    level = restorestack(L, levelrel);
+  }
+  return level;
+}
+
+
+Proto *luaF_newproto (lua_State *L) {
+  GCObject *o = luaC_newobj(L, LUA_VPROTO, sizeof(Proto));
+  Proto *f = gco2p(o);
+  f->k = NULL;
+  f->sizek = 0;
+  f->p = NULL;
+  f->sizep = 0;
+  f->code = NULL;
+  f->sizecode = 0;
+  f->lineinfo = NULL;
+  f->sizelineinfo = 0;
+  f->abslineinfo = NULL;
+  f->sizeabslineinfo = 0;
+  f->upvalues = NULL;
+  f->sizeupvalues = 0;
+  f->numparams = 0;
+  f->is_vararg = 0;
+  f->maxstacksize = 0;
+  f->locvars = NULL;
+  f->sizelocvars = 0;
+  f->linedefined = 0;
+  f->lastlinedefined = 0;
+  f->source = NULL;
+  return f;
+}
+
+
+void luaF_freeproto (lua_State *L, Proto *f) {
+  luaM_freearray(L, f->code, f->sizecode);
+  luaM_freearray(L, f->p, f->sizep);
+  luaM_freearray(L, f->k, f->sizek);
+  luaM_freearray(L, f->lineinfo, f->sizelineinfo);
+  luaM_freearray(L, f->abslineinfo, f->sizeabslineinfo);
+  luaM_freearray(L, f->locvars, f->sizelocvars);
+  luaM_freearray(L, f->upvalues, f->sizeupvalues);
+  luaM_free(L, f);
+}
+
+
+/*
+** Look for n-th local variable at line 'line' in function 'func'.
+** Returns NULL if not found.
+*/
+const char *luaF_getlocalname (const Proto *f, int local_number, int pc) {
+  int i;
+  for (i = 0; i<f->sizelocvars && f->locvars[i].startpc <= pc; i++) {
+    if (pc < f->locvars[i].endpc) {  /* is variable active? */
+      local_number--;
+      if (local_number == 0)
+        return getstr(f->locvars[i].varname);
+    }
+  }
+  return NULL;  /* not found */
+}
+
@@ -0,0 +1,64 @@
+/*
+** $Id: lfunc.h $
+** Auxiliary functions to manipulate prototypes and closures
+** See Copyright Notice in lua.h
+*/
+
+#ifndef lfunc_h
+#define lfunc_h
+
+
+#include "lobject.h"
+
+
+#define sizeCclosure(n)	(cast_int(offsetof(CClosure, upvalue)) + \
+                         cast_int(sizeof(TValue)) * (n))
+
+#define sizeLclosure(n)	(cast_int(offsetof(LClosure, upvals)) + \
+                         cast_int(sizeof(TValue *)) * (n))
+
+
+/* test whether thread is in 'twups' list */
+#define isintwups(L)	(L->twups != L)
+
+
+/*
+** maximum number of upvalues in a closure (both C and Lua). (Value
+** must fit in a VM register.)
+*/
+#define MAXUPVAL	255
+
+
+#define upisopen(up)	((up)->v.p != &(up)->u.value)
+
+
+#define uplevel(up)	check_exp(upisopen(up), cast(StkId, (up)->v.p))
+
+
+/*
+** maximum number of misses before giving up the cache of closures
+** in prototypes
+*/
+#define MAXMISS		10
+
+
+
+/* special status to close upvalues preserving the top of the stack */
+#define CLOSEKTOP	(-1)
+
+
+LUAI_FUNC Proto *luaF_newproto (lua_State *L);
+LUAI_FUNC CClosure *luaF_newCclosure (lua_State *L, int nupvals);
+LUAI_FUNC LClosure *luaF_newLclosure (lua_State *L, int nupvals);
+LUAI_FUNC void luaF_initupvals (lua_State *L, LClosure *cl);
+LUAI_FUNC UpVal *luaF_findupval (lua_State *L, StkId level);
+LUAI_FUNC void luaF_newtbcupval (lua_State *L, StkId level);
+LUAI_FUNC void luaF_closeupval (lua_State *L, StkId level);
+LUAI_FUNC StkId luaF_close (lua_State *L, StkId level, int status, int yy);
+LUAI_FUNC void luaF_unlinkupval (UpVal *uv);
+LUAI_FUNC void luaF_freeproto (lua_State *L, Proto *f);
+LUAI_FUNC const char *luaF_getlocalname (const Proto *func, int local_number,
+                                         int pc);
+
+
+#endif
@@ -0,0 +1,202 @@
+/*
+** $Id: lgc.h $
+** Garbage Collector
+** See Copyright Notice in lua.h
+*/
+
+#ifndef lgc_h
+#define lgc_h
+
+
+#include "lobject.h"
+#include "lstate.h"
+
+/*
+** Collectable objects may have one of three colors: white, which means
+** the object is not marked; gray, which means the object is marked, but
+** its references may be not marked; and black, which means that the
+** object and all its references are marked.  The main invariant of the
+** garbage collector, while marking objects, is that a black object can
+** never point to a white one. Moreover, any gray object must be in a
+** "gray list" (gray, grayagain, weak, allweak, ephemeron) so that it
+** can be visited again before finishing the collection cycle. (Open
+** upvalues are an exception to this rule.)  These lists have no meaning
+** when the invariant is not being enforced (e.g., sweep phase).
+*/
+
+
+/*
+** Possible states of the Garbage Collector
+*/
+#define GCSpropagate	0
+#define GCSenteratomic	1
+#define GCSatomic	2
+#define GCSswpallgc	3
+#define GCSswpfinobj	4
+#define GCSswptobefnz	5
+#define GCSswpend	6
+#define GCScallfin	7
+#define GCSpause	8
+
+
+#define issweepphase(g)  \
+	(GCSswpallgc <= (g)->gcstate && (g)->gcstate <= GCSswpend)
+
+
+/*
+** macro to tell when main invariant (white objects cannot point to black
+** ones) must be kept. During a collection, the sweep
+** phase may break the invariant, as objects turned white may point to
+** still-black objects. The invariant is restored when sweep ends and
+** all objects are white again.
+*/
+
+#define keepinvariant(g)	((g)->gcstate <= GCSatomic)
+
+
+/*
+** some useful bit tricks
+*/
+#define resetbits(x,m)		((x) &= cast_byte(~(m)))
+#define setbits(x,m)		((x) |= (m))
+#define testbits(x,m)		((x) & (m))
+#define bitmask(b)		(1<<(b))
+#define bit2mask(b1,b2)		(bitmask(b1) | bitmask(b2))
+#define l_setbit(x,b)		setbits(x, bitmask(b))
+#define resetbit(x,b)		resetbits(x, bitmask(b))
+#define testbit(x,b)		testbits(x, bitmask(b))
+
+
+/*
+** Layout for bit use in 'marked' field. First three bits are
+** used for object "age" in generational mode. Last bit is used
+** by tests.
+*/
+#define WHITE0BIT	3  /* object is white (type 0) */
+#define WHITE1BIT	4  /* object is white (type 1) */
+#define BLACKBIT	5  /* object is black */
+#define FINALIZEDBIT	6  /* object has been marked for finalization */
+
+#define TESTBIT		7
+
+
+
+#define WHITEBITS	bit2mask(WHITE0BIT, WHITE1BIT)
+
+
+#define iswhite(x)      testbits((x)->marked, WHITEBITS)
+#define isblack(x)      testbit((x)->marked, BLACKBIT)
+#define isgray(x)  /* neither white nor black */  \
+	(!testbits((x)->marked, WHITEBITS | bitmask(BLACKBIT)))
+
+#define tofinalize(x)	testbit((x)->marked, FINALIZEDBIT)
+
+#define otherwhite(g)	((g)->currentwhite ^ WHITEBITS)
+#define isdeadm(ow,m)	((m) & (ow))
+#define isdead(g,v)	isdeadm(otherwhite(g), (v)->marked)
+
+#define changewhite(x)	((x)->marked ^= WHITEBITS)
+#define nw2black(x)  \
+	check_exp(!iswhite(x), l_setbit((x)->marked, BLACKBIT))
+
+#define luaC_white(g)	cast_byte((g)->currentwhite & WHITEBITS)
+
+
+/* object age in generational mode */
+#define G_NEW		0	/* created in current cycle */
+#define G_SURVIVAL	1	/* created in previous cycle */
+#define G_OLD0		2	/* marked old by frw. barrier in this cycle */
+#define G_OLD1		3	/* first full cycle as old */
+#define G_OLD		4	/* really old object (not to be visited) */
+#define G_TOUCHED1	5	/* old object touched this cycle */
+#define G_TOUCHED2	6	/* old object touched in previous cycle */
+
+#define AGEBITS		7  /* all age bits (111) */
+
+#define getage(o)	((o)->marked & AGEBITS)
+#define setage(o,a)  ((o)->marked = cast_byte(((o)->marked & (~AGEBITS)) | a))
+#define isold(o)	(getage(o) > G_SURVIVAL)
+
+#define changeage(o,f,t)  \
+	check_exp(getage(o) == (f), (o)->marked ^= ((f)^(t)))
+
+
+/* Default Values for GC parameters */
+#define LUAI_GENMAJORMUL         100
+#define LUAI_GENMINORMUL         20
+
+/* wait memory to double before starting new cycle */
+#define LUAI_GCPAUSE    200
+
+/*
+** some gc parameters are stored divided by 4 to allow a maximum value
+** up to 1023 in a 'lu_byte'.
+*/
+#define getgcparam(p)	((p) * 4)
+#define setgcparam(p,v)	((p) = (v) / 4)
+
+#define LUAI_GCMUL      100
+
+/* how much to allocate before next GC step (log2) */
+#define LUAI_GCSTEPSIZE 13      /* 8 KB */
+
+
+/*
+** Check whether the declared GC mode is generational. While in
+** generational mode, the collector can go temporarily to incremental
+** mode to improve performance. This is signaled by 'g->lastatomic != 0'.
+*/
+#define isdecGCmodegen(g)	(g->gckind == KGC_GEN || g->lastatomic != 0)
+
+
+/*
+** Control when GC is running:
+*/
+#define GCSTPUSR	1  /* bit true when GC stopped by user */
+#define GCSTPGC		2  /* bit true when GC stopped by itself */
+#define GCSTPCLS	4  /* bit true when closing Lua state */
+#define gcrunning(g)	((g)->gcstp == 0)
+
+
+/*
+** Does one step of collection when debt becomes positive. 'pre'/'pos'
+** allows some adjustments to be done only when needed. macro
+** 'condchangemem' is used only for heavy tests (forcing a full
+** GC cycle on every opportunity)
+*/
+#define luaC_condGC(L,pre,pos) \
+	{ if (G(L)->GCdebt > 0) { pre; luaC_step(L); pos;}; \
+	  condchangemem(L,pre,pos); }
+
+/* more often than not, 'pre'/'pos' are empty */
+#define luaC_checkGC(L)		luaC_condGC(L,(void)0,(void)0)
+
+
+#define luaC_objbarrier(L,p,o) (  \
+	(isblack(p) && iswhite(o)) ? \
+	luaC_barrier_(L,obj2gco(p),obj2gco(o)) : cast_void(0))
+
+#define luaC_barrier(L,p,v) (  \
+	iscollectable(v) ? luaC_objbarrier(L,p,gcvalue(v)) : cast_void(0))
+
+#define luaC_objbarrierback(L,p,o) (  \
+	(isblack(p) && iswhite(o)) ? luaC_barrierback_(L,p) : cast_void(0))
+
+#define luaC_barrierback(L,p,v) (  \
+	iscollectable(v) ? luaC_objbarrierback(L, p, gcvalue(v)) : cast_void(0))
+
+LUAI_FUNC void luaC_fix (lua_State *L, GCObject *o);
+LUAI_FUNC void luaC_freeallobjects (lua_State *L);
+LUAI_FUNC void luaC_step (lua_State *L);
+LUAI_FUNC void luaC_runtilstate (lua_State *L, int statesmask);
+LUAI_FUNC void luaC_fullgc (lua_State *L, int isemergency);
+LUAI_FUNC GCObject *luaC_newobj (lua_State *L, int tt, size_t sz);
+LUAI_FUNC GCObject *luaC_newobjdt (lua_State *L, int tt, size_t sz,
+                                                 size_t offset);
+LUAI_FUNC void luaC_barrier_ (lua_State *L, GCObject *o, GCObject *v);
+LUAI_FUNC void luaC_barrierback_ (lua_State *L, GCObject *o);
+LUAI_FUNC void luaC_checkfinalizer (lua_State *L, GCObject *o, Table *mt);
+LUAI_FUNC void luaC_changemode (lua_State *L, int newmode);
+
+
+#endif
@@ -0,0 +1,65 @@
+/*
+** $Id: linit.c $
+** Initialization of libraries for lua.c and other clients
+** See Copyright Notice in lua.h
+*/
+
+
+#define linit_c
+#define LUA_LIB
+
+/*
+** If you embed Lua in your program and need to open the standard
+** libraries, call luaL_openlibs in your program. If you need a
+** different set of libraries, copy this file to your project and edit
+** it to suit your needs.
+**
+** You can also *preload* libraries, so that a later 'require' can
+** open the library, which is already linked to the application.
+** For that, do the following code:
+**
+**  luaL_getsubtable(L, LUA_REGISTRYINDEX, LUA_PRELOAD_TABLE);
+**  lua_pushcfunction(L, luaopen_modname);
+**  lua_setfield(L, -2, modname);
+**  lua_pop(L, 1);  // remove PRELOAD table
+*/
+
+#include "lprefix.h"
+
+
+#include <stddef.h>
+
+#include "lua.h"
+
+#include "lualib.h"
+#include "lauxlib.h"
+
+
+/*
+** these libs are loaded by lua.c and are readily available to any Lua
+** program
+*/
+static const luaL_Reg loadedlibs[] = {
+  {LUA_GNAME, luaopen_base},
+  {LUA_LOADLIBNAME, luaopen_package},
+  {LUA_COLIBNAME, luaopen_coroutine},
+  {LUA_TABLIBNAME, luaopen_table},
+  {LUA_IOLIBNAME, luaopen_io},
+  {LUA_OSLIBNAME, luaopen_os},
+  {LUA_STRLIBNAME, luaopen_string},
+  {LUA_MATHLIBNAME, luaopen_math},
+  {LUA_UTF8LIBNAME, luaopen_utf8},
+  {LUA_DBLIBNAME, luaopen_debug},
+  {NULL, NULL}
+};
+
+
+LUALIB_API void luaL_openlibs (lua_State *L) {
+  const luaL_Reg *lib;
+  /* "require" functions from 'loadedlibs' and set results to global table */
+  for (lib = loadedlibs; lib->func; lib++) {
+    luaL_requiref(L, lib->name, lib->func, 1);
+    lua_pop(L, 1);  /* remove lib */
+  }
+}
+
@@ -0,0 +1,841 @@
+/*
+** $Id: liolib.c $
+** Standard I/O (and system) library
+** See Copyright Notice in lua.h
+*/
+
+#define liolib_c
+#define LUA_LIB
+
+#include "lprefix.h"
+
+
+#include <ctype.h>
+#include <errno.h>
+#include <locale.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+#include "lua.h"
+
+#include "lauxlib.h"
+#include "lualib.h"
+
+
+
+
+/*
+** Change this macro to accept other modes for 'fopen' besides
+** the standard ones.
+*/
+#if !defined(l_checkmode)
+
+/* accepted extensions to 'mode' in 'fopen' */
+#if !defined(L_MODEEXT)
+#define L_MODEEXT	"b"
+#endif
+
+/* Check whether 'mode' matches '[rwa]%+?[L_MODEEXT]*' */
+static int l_checkmode (const char *mode) {
+  return (*mode != '\0' && strchr("rwa", *(mode++)) != NULL &&
+         (*mode != '+' || ((void)(++mode), 1)) &&  /* skip if char is '+' */
+         (strspn(mode, L_MODEEXT) == strlen(mode)));  /* check extensions */
+}
+
+#endif
+
+/*
+** {======================================================
+** l_popen spawns a new process connected to the current
+** one through the file streams.
+** =======================================================
+*/
+
+#if !defined(l_popen)		/* { */
+
+#if defined(LUA_USE_POSIX)	/* { */
+
+#define l_popen(L,c,m)		(fflush(NULL), popen(c,m))
+#define l_pclose(L,file)	(pclose(file))
+
+#elif defined(LUA_USE_WINDOWS)	/* }{ */
+
+#define l_popen(L,c,m)		(_popen(c,m))
+#define l_pclose(L,file)	(_pclose(file))
+
+#if !defined(l_checkmodep)
+/* Windows accepts "[rw][bt]?" as valid modes */
+#define l_checkmodep(m)	((m[0] == 'r' || m[0] == 'w') && \
+  (m[1] == '\0' || ((m[1] == 'b' || m[1] == 't') && m[2] == '\0')))
+#endif
+
+#else				/* }{ */
+
+/* ISO C definitions */
+#define l_popen(L,c,m)  \
+	  ((void)c, (void)m, \
+	  luaL_error(L, "'popen' not supported"), \
+	  (FILE*)0)
+#define l_pclose(L,file)		((void)L, (void)file, -1)
+
+#endif				/* } */
+
+#endif				/* } */
+
+
+#if !defined(l_checkmodep)
+/* By default, Lua accepts only "r" or "w" as valid modes */
+#define l_checkmodep(m)        ((m[0] == 'r' || m[0] == 'w') && m[1] == '\0')
+#endif
+
+/* }====================================================== */
+
+
+#if !defined(l_getc)		/* { */
+
+#if defined(LUA_USE_POSIX)
+#define l_getc(f)		getc_unlocked(f)
+#define l_lockfile(f)		flockfile(f)
+#define l_unlockfile(f)		funlockfile(f)
+#else
+#define l_getc(f)		getc(f)
+#define l_lockfile(f)		((void)0)
+#define l_unlockfile(f)		((void)0)
+#endif
+
+#endif				/* } */
+
+
+/*
+** {======================================================
+** l_fseek: configuration for longer offsets
+** =======================================================
+*/
+
+#if !defined(l_fseek)		/* { */
+
+#if defined(LUA_USE_POSIX)	/* { */
+
+#include <sys/types.h>
+
+#define l_fseek(f,o,w)		fseeko(f,o,w)
+#define l_ftell(f)		ftello(f)
+#define l_seeknum		off_t
+
+#elif defined(LUA_USE_WINDOWS) && !defined(_CRTIMP_TYPEINFO) \
+   && defined(_MSC_VER) && (_MSC_VER >= 1400)	/* }{ */
+
+/* Windows (but not DDK) and Visual C++ 2005 or higher */
+#define l_fseek(f,o,w)		_fseeki64(f,o,w)
+#define l_ftell(f)		_ftelli64(f)
+#define l_seeknum		__int64
+
+#else				/* }{ */
+
+/* ISO C definitions */
+#define l_fseek(f,o,w)		fseek(f,o,w)
+#define l_ftell(f)		ftell(f)
+#define l_seeknum		long
+
+#endif				/* } */
+
+#endif				/* } */
+
+/* }====================================================== */
+
+
+
+#define IO_PREFIX	"_IO_"
+#define IOPREF_LEN	(sizeof(IO_PREFIX)/sizeof(char) - 1)
+#define IO_INPUT	(IO_PREFIX "input")
+#define IO_OUTPUT	(IO_PREFIX "output")
+
+
+typedef luaL_Stream LStream;
+
+
+#define tolstream(L)	((LStream *)luaL_checkudata(L, 1, LUA_FILEHANDLE))
+
+#define isclosed(p)	((p)->closef == NULL)
+
+
+static int io_type (lua_State *L) {
+  LStream *p;
+  luaL_checkany(L, 1);
+  p = (LStream *)luaL_testudata(L, 1, LUA_FILEHANDLE);
+  if (p == NULL)
+    luaL_pushfail(L);  /* not a file */
+  else if (isclosed(p))
+    lua_pushliteral(L, "closed file");
+  else
+    lua_pushliteral(L, "file");
+  return 1;
+}
+
+
+static int f_tostring (lua_State *L) {
+  LStream *p = tolstream(L);
+  if (isclosed(p))
+    lua_pushliteral(L, "file (closed)");
+  else
+    lua_pushfstring(L, "file (%p)", p->f);
+  return 1;
+}
+
+
+static FILE *tofile (lua_State *L) {
+  LStream *p = tolstream(L);
+  if (l_unlikely(isclosed(p)))
+    luaL_error(L, "attempt to use a closed file");
+  lua_assert(p->f);
+  return p->f;
+}
+
+
+/*
+** When creating file handles, always creates a 'closed' file handle
+** before opening the actual file; so, if there is a memory error, the
+** handle is in a consistent state.
+*/
+static LStream *newprefile (lua_State *L) {
+  LStream *p = (LStream *)lua_newuserdatauv(L, sizeof(LStream), 0);
+  p->closef = NULL;  /* mark file handle as 'closed' */
+  luaL_setmetatable(L, LUA_FILEHANDLE);
+  return p;
+}
+
+
+/*
+** Calls the 'close' function from a file handle. The 'volatile' avoids
+** a bug in some versions of the Clang compiler (e.g., clang 3.0 for
+** 32 bits).
+*/
+static int aux_close (lua_State *L) {
+  LStream *p = tolstream(L);
+  volatile lua_CFunction cf = p->closef;
+  p->closef = NULL;  /* mark stream as closed */
+  return (*cf)(L);  /* close it */
+}
+
+
+static int f_close (lua_State *L) {
+  tofile(L);  /* make sure argument is an open stream */
+  return aux_close(L);
+}
+
+
+static int io_close (lua_State *L) {
+  if (lua_isnone(L, 1))  /* no argument? */
+    lua_getfield(L, LUA_REGISTRYINDEX, IO_OUTPUT);  /* use default output */
+  return f_close(L);
+}
+
+
+static int f_gc (lua_State *L) {
+  LStream *p = tolstream(L);
+  if (!isclosed(p) && p->f != NULL)
+    aux_close(L);  /* ignore closed and incompletely open files */
+  return 0;
+}
+
+
+/*
+** function to close regular files
+*/
+static int io_fclose (lua_State *L) {
+  LStream *p = tolstream(L);
+  errno = 0;
+  return luaL_fileresult(L, (fclose(p->f) == 0), NULL);
+}
+
+
+static LStream *newfile (lua_State *L) {
+  LStream *p = newprefile(L);
+  p->f = NULL;
+  p->closef = &io_fclose;
+  return p;
+}
+
+
+static void opencheck (lua_State *L, const char *fname, const char *mode) {
+  LStream *p = newfile(L);
+  p->f = fopen(fname, mode);
+  if (l_unlikely(p->f == NULL))
+    luaL_error(L, "cannot open file '%s' (%s)", fname, strerror(errno));
+}
+
+
+static int io_open (lua_State *L) {
+  const char *filename = luaL_checkstring(L, 1);
+  const char *mode = luaL_optstring(L, 2, "r");
+  LStream *p = newfile(L);
+  const char *md = mode;  /* to traverse/check mode */
+  luaL_argcheck(L, l_checkmode(md), 2, "invalid mode");
+  errno = 0;
+  p->f = fopen(filename, mode);
+  return (p->f == NULL) ? luaL_fileresult(L, 0, filename) : 1;
+}
+
+
+/*
+** function to close 'popen' files
+*/
+static int io_pclose (lua_State *L) {
+  LStream *p = tolstream(L);
+  errno = 0;
+  return luaL_execresult(L, l_pclose(L, p->f));
+}
+
+
+static int io_popen (lua_State *L) {
+  const char *filename = luaL_checkstring(L, 1);
+  const char *mode = luaL_optstring(L, 2, "r");
+  LStream *p = newprefile(L);
+  luaL_argcheck(L, l_checkmodep(mode), 2, "invalid mode");
+  errno = 0;
+  p->f = l_popen(L, filename, mode);
+  p->closef = &io_pclose;
+  return (p->f == NULL) ? luaL_fileresult(L, 0, filename) : 1;
+}
+
+
+static int io_tmpfile (lua_State *L) {
+  LStream *p = newfile(L);
+  errno = 0;
+  p->f = tmpfile();
+  return (p->f == NULL) ? luaL_fileresult(L, 0, NULL) : 1;
+}
+
+
+static FILE *getiofile (lua_State *L, const char *findex) {
+  LStream *p;
+  lua_getfield(L, LUA_REGISTRYINDEX, findex);
+  p = (LStream *)lua_touserdata(L, -1);
+  if (l_unlikely(isclosed(p)))
+    luaL_error(L, "default %s file is closed", findex + IOPREF_LEN);
+  return p->f;
+}
+
+
+static int g_iofile (lua_State *L, const char *f, const char *mode) {
+  if (!lua_isnoneornil(L, 1)) {
+    const char *filename = lua_tostring(L, 1);
+    if (filename)
+      opencheck(L, filename, mode);
+    else {
+      tofile(L);  /* check that it's a valid file handle */
+      lua_pushvalue(L, 1);
+    }
+    lua_setfield(L, LUA_REGISTRYINDEX, f);
+  }
+  /* return current value */
+  lua_getfield(L, LUA_REGISTRYINDEX, f);
+  return 1;
+}
+
+
+static int io_input (lua_State *L) {
+  return g_iofile(L, IO_INPUT, "r");
+}
+
+
+static int io_output (lua_State *L) {
+  return g_iofile(L, IO_OUTPUT, "w");
+}
+
+
+static int io_readline (lua_State *L);
+
+
+/*
+** maximum number of arguments to 'f:lines'/'io.lines' (it + 3 must fit
+** in the limit for upvalues of a closure)
+*/
+#define MAXARGLINE	250
+
+/*
+** Auxiliary function to create the iteration function for 'lines'.
+** The iteration function is a closure over 'io_readline', with
+** the following upvalues:
+** 1) The file being read (first value in the stack)
+** 2) the number of arguments to read
+** 3) a boolean, true iff file has to be closed when finished ('toclose')
+** *) a variable number of format arguments (rest of the stack)
+*/
+static void aux_lines (lua_State *L, int toclose) {
+  int n = lua_gettop(L) - 1;  /* number of arguments to read */
+  luaL_argcheck(L, n <= MAXARGLINE, MAXARGLINE + 2, "too many arguments");
+  lua_pushvalue(L, 1);  /* file */
+  lua_pushinteger(L, n);  /* number of arguments to read */
+  lua_pushboolean(L, toclose);  /* close/not close file when finished */
+  lua_rotate(L, 2, 3);  /* move the three values to their positions */
+  lua_pushcclosure(L, io_readline, 3 + n);
+}
+
+
+static int f_lines (lua_State *L) {
+  tofile(L);  /* check that it's a valid file handle */
+  aux_lines(L, 0);
+  return 1;
+}
+
+
+/*
+** Return an iteration function for 'io.lines'. If file has to be
+** closed, also returns the file itself as a second result (to be
+** closed as the state at the exit of a generic for).
+*/
+static int io_lines (lua_State *L) {
+  int toclose;
+  if (lua_isnone(L, 1)) lua_pushnil(L);  /* at least one argument */
+  if (lua_isnil(L, 1)) {  /* no file name? */
+    lua_getfield(L, LUA_REGISTRYINDEX, IO_INPUT);  /* get default input */
+    lua_replace(L, 1);  /* put it at index 1 */
+    tofile(L);  /* check that it's a valid file handle */
+    toclose = 0;  /* do not close it after iteration */
+  }
+  else {  /* open a new file */
+    const char *filename = luaL_checkstring(L, 1);
+    opencheck(L, filename, "r");
+    lua_replace(L, 1);  /* put file at index 1 */
+    toclose = 1;  /* close it after iteration */
+  }
+  aux_lines(L, toclose);  /* push iteration function */
+  if (toclose) {
+    lua_pushnil(L);  /* state */
+    lua_pushnil(L);  /* control */
+    lua_pushvalue(L, 1);  /* file is the to-be-closed variable (4th result) */
+    return 4;
+  }
+  else
+    return 1;
+}
+
+
+/*
+** {======================================================
+** READ
+** =======================================================
+*/
+
+
+/* maximum length of a numeral */
+#if !defined (L_MAXLENNUM)
+#define L_MAXLENNUM     200
+#endif
+
+
+/* auxiliary structure used by 'read_number' */
+typedef struct {
+  FILE *f;  /* file being read */
+  int c;  /* current character (look ahead) */
+  int n;  /* number of elements in buffer 'buff' */
+  char buff[L_MAXLENNUM + 1];  /* +1 for ending '\0' */
+} RN;
+
+
+/*
+** Add current char to buffer (if not out of space) and read next one
+*/
+static int nextc (RN *rn) {
+  if (l_unlikely(rn->n >= L_MAXLENNUM)) {  /* buffer overflow? */
+    rn->buff[0] = '\0';  /* invalidate result */
+    return 0;  /* fail */
+  }
+  else {
+    rn->buff[rn->n++] = rn->c;  /* save current char */
+    rn->c = l_getc(rn->f);  /* read next one */
+    return 1;
+  }
+}
+
+
+/*
+** Accept current char if it is in 'set' (of size 2)
+*/
+static int test2 (RN *rn, const char *set) {
+  if (rn->c == set[0] || rn->c == set[1])
+    return nextc(rn);
+  else return 0;
+}
+
+
+/*
+** Read a sequence of (hex)digits
+*/
+static int readdigits (RN *rn, int hex) {
+  int count = 0;
+  while ((hex ? isxdigit(rn->c) : isdigit(rn->c)) && nextc(rn))
+    count++;
+  return count;
+}
+
+
+/*
+** Read a number: first reads a valid prefix of a numeral into a buffer.
+** Then it calls 'lua_stringtonumber' to check whether the format is
+** correct and to convert it to a Lua number.
+*/
+static int read_number (lua_State *L, FILE *f) {
+  RN rn;
+  int count = 0;
+  int hex = 0;
+  char decp[2];
+  rn.f = f; rn.n = 0;
+  decp[0] = lua_getlocaledecpoint();  /* get decimal point from locale */
+  decp[1] = '.';  /* always accept a dot */
+  l_lockfile(rn.f);
+  do { rn.c = l_getc(rn.f); } while (isspace(rn.c));  /* skip spaces */
+  test2(&rn, "-+");  /* optional sign */
+  if (test2(&rn, "00")) {
+    if (test2(&rn, "xX")) hex = 1;  /* numeral is hexadecimal */
+    else count = 1;  /* count initial '0' as a valid digit */
+  }
+  count += readdigits(&rn, hex);  /* integral part */
+  if (test2(&rn, decp))  /* decimal point? */
+    count += readdigits(&rn, hex);  /* fractional part */
+  if (count > 0 && test2(&rn, (hex ? "pP" : "eE"))) {  /* exponent mark? */
+    test2(&rn, "-+");  /* exponent sign */
+    readdigits(&rn, 0);  /* exponent digits */
+  }
+  ungetc(rn.c, rn.f);  /* unread look-ahead char */
+  l_unlockfile(rn.f);
+  rn.buff[rn.n] = '\0';  /* finish string */
+  if (l_likely(lua_stringtonumber(L, rn.buff)))
+    return 1;  /* ok, it is a valid number */
+  else {  /* invalid format */
+   lua_pushnil(L);  /* "result" to be removed */
+   return 0;  /* read fails */
+  }
+}
+
+
+static int test_eof (lua_State *L, FILE *f) {
+  int c = getc(f);
+  ungetc(c, f);  /* no-op when c == EOF */
+  lua_pushliteral(L, "");
+  return (c != EOF);
+}
+
+
+static int read_line (lua_State *L, FILE *f, int chop) {
+  luaL_Buffer b;
+  int c;
+  luaL_buffinit(L, &b);
+  do {  /* may need to read several chunks to get whole line */
+    char *buff = luaL_prepbuffer(&b);  /* preallocate buffer space */
+    int i = 0;
+    l_lockfile(f);  /* no memory errors can happen inside the lock */
+    while (i < LUAL_BUFFERSIZE && (c = l_getc(f)) != EOF && c != '\n')
+      buff[i++] = c;  /* read up to end of line or buffer limit */
+    l_unlockfile(f);
+    luaL_addsize(&b, i);
+  } while (c != EOF && c != '\n');  /* repeat until end of line */
+  if (!chop && c == '\n')  /* want a newline and have one? */
+    luaL_addchar(&b, c);  /* add ending newline to result */
+  luaL_pushresult(&b);  /* close buffer */
+  /* return ok if read something (either a newline or something else) */
+  return (c == '\n' || lua_rawlen(L, -1) > 0);
+}
+
+
+static void read_all (lua_State *L, FILE *f) {
+  size_t nr;
+  luaL_Buffer b;
+  luaL_buffinit(L, &b);
+  do {  /* read file in chunks of LUAL_BUFFERSIZE bytes */
+    char *p = luaL_prepbuffer(&b);
+    nr = fread(p, sizeof(char), LUAL_BUFFERSIZE, f);
+    luaL_addsize(&b, nr);
+  } while (nr == LUAL_BUFFERSIZE);
+  luaL_pushresult(&b);  /* close buffer */
+}
+
+
+static int read_chars (lua_State *L, FILE *f, size_t n) {
+  size_t nr;  /* number of chars actually read */
+  char *p;
+  luaL_Buffer b;
+  luaL_buffinit(L, &b);
+  p = luaL_prepbuffsize(&b, n);  /* prepare buffer to read whole block */
+  nr = fread(p, sizeof(char), n, f);  /* try to read 'n' chars */
+  luaL_addsize(&b, nr);
+  luaL_pushresult(&b);  /* close buffer */
+  return (nr > 0);  /* true iff read something */
+}
+
+
+static int g_read (lua_State *L, FILE *f, int first) {
+  int nargs = lua_gettop(L) - 1;
+  int n, success;
+  clearerr(f);
+  errno = 0;
+  if (nargs == 0) {  /* no arguments? */
+    success = read_line(L, f, 1);
+    n = first + 1;  /* to return 1 result */
+  }
+  else {
+    /* ensure stack space for all results and for auxlib's buffer */
+    luaL_checkstack(L, nargs+LUA_MINSTACK, "too many arguments");
+    success = 1;
+    for (n = first; nargs-- && success; n++) {
+      if (lua_type(L, n) == LUA_TNUMBER) {
+        size_t l = (size_t)luaL_checkinteger(L, n);
+        success = (l == 0) ? test_eof(L, f) : read_chars(L, f, l);
+      }
+      else {
+        const char *p = luaL_checkstring(L, n);
+        if (*p == '*') p++;  /* skip optional '*' (for compatibility) */
+        switch (*p) {
+          case 'n':  /* number */
+            success = read_number(L, f);
+            break;
+          case 'l':  /* line */
+            success = read_line(L, f, 1);
+            break;
+          case 'L':  /* line with end-of-line */
+            success = read_line(L, f, 0);
+            break;
+          case 'a':  /* file */
+            read_all(L, f);  /* read entire file */
+            success = 1; /* always success */
+            break;
+          default:
+            return luaL_argerror(L, n, "invalid format");
+        }
+      }
+    }
+  }
+  if (ferror(f))
+    return luaL_fileresult(L, 0, NULL);
+  if (!success) {
+    lua_pop(L, 1);  /* remove last result */
+    luaL_pushfail(L);  /* push nil instead */
+  }
+  return n - first;
+}
+
+
+static int io_read (lua_State *L) {
+  return g_read(L, getiofile(L, IO_INPUT), 1);
+}
+
+
+static int f_read (lua_State *L) {
+  return g_read(L, tofile(L), 2);
+}
+
+
+/*
+** Iteration function for 'lines'.
+*/
+static int io_readline (lua_State *L) {
+  LStream *p = (LStream *)lua_touserdata(L, lua_upvalueindex(1));
+  int i;
+  int n = (int)lua_tointeger(L, lua_upvalueindex(2));
+  if (isclosed(p))  /* file is already closed? */
+    return luaL_error(L, "file is already closed");
+  lua_settop(L , 1);
+  luaL_checkstack(L, n, "too many arguments");
+  for (i = 1; i <= n; i++)  /* push arguments to 'g_read' */
+    lua_pushvalue(L, lua_upvalueindex(3 + i));
+  n = g_read(L, p->f, 2);  /* 'n' is number of results */
+  lua_assert(n > 0);  /* should return at least a nil */
+  if (lua_toboolean(L, -n))  /* read at least one value? */
+    return n;  /* return them */
+  else {  /* first result is false: EOF or error */
+    if (n > 1) {  /* is there error information? */
+      /* 2nd result is error message */
+      return luaL_error(L, "%s", lua_tostring(L, -n + 1));
+    }
+    if (lua_toboolean(L, lua_upvalueindex(3))) {  /* generator created file? */
+      lua_settop(L, 0);  /* clear stack */
+      lua_pushvalue(L, lua_upvalueindex(1));  /* push file at index 1 */
+      aux_close(L);  /* close it */
+    }
+    return 0;
+  }
+}
+
+/* }====================================================== */
+
+
+static int g_write (lua_State *L, FILE *f, int arg) {
+  int nargs = lua_gettop(L) - arg;
+  int status = 1;
+  errno = 0;
+  for (; nargs--; arg++) {
+    if (lua_type(L, arg) == LUA_TNUMBER) {
+      /* optimization: could be done exactly as for strings */
+      int len = lua_isinteger(L, arg)
+                ? fprintf(f, LUA_INTEGER_FMT,
+                             (LUAI_UACINT)lua_tointeger(L, arg))
+                : fprintf(f, LUA_NUMBER_FMT,
+                             (LUAI_UACNUMBER)lua_tonumber(L, arg));
+      status = status && (len > 0);
+    }
+    else {
+      size_t l;
+      const char *s = luaL_checklstring(L, arg, &l);
+      status = status && (fwrite(s, sizeof(char), l, f) == l);
+    }
+  }
+  if (l_likely(status))
+    return 1;  /* file handle already on stack top */
+  else
+    return luaL_fileresult(L, status, NULL);
+}
+
+
+static int io_write (lua_State *L) {
+  return g_write(L, getiofile(L, IO_OUTPUT), 1);
+}
+
+
+static int f_write (lua_State *L) {
+  FILE *f = tofile(L);
+  lua_pushvalue(L, 1);  /* push file at the stack top (to be returned) */
+  return g_write(L, f, 2);
+}
+
+
+static int f_seek (lua_State *L) {
+  static const int mode[] = {SEEK_SET, SEEK_CUR, SEEK_END};
+  static const char *const modenames[] = {"set", "cur", "end", NULL};
+  FILE *f = tofile(L);
+  int op = luaL_checkoption(L, 2, "cur", modenames);
+  lua_Integer p3 = luaL_optinteger(L, 3, 0);
+  l_seeknum offset = (l_seeknum)p3;
+  luaL_argcheck(L, (lua_Integer)offset == p3, 3,
+                  "not an integer in proper range");
+  errno = 0;
+  op = l_fseek(f, offset, mode[op]);
+  if (l_unlikely(op))
+    return luaL_fileresult(L, 0, NULL);  /* error */
+  else {
+    lua_pushinteger(L, (lua_Integer)l_ftell(f));
+    return 1;
+  }
+}
+
+
+static int f_setvbuf (lua_State *L) {
+  static const int mode[] = {_IONBF, _IOFBF, _IOLBF};
+  static const char *const modenames[] = {"no", "full", "line", NULL};
+  FILE *f = tofile(L);
+  int op = luaL_checkoption(L, 2, NULL, modenames);
+  lua_Integer sz = luaL_optinteger(L, 3, LUAL_BUFFERSIZE);
+  int res;
+  errno = 0;
+  res = setvbuf(f, NULL, mode[op], (size_t)sz);
+  return luaL_fileresult(L, res == 0, NULL);
+}
+
+
+
+static int io_flush (lua_State *L) {
+  FILE *f = getiofile(L, IO_OUTPUT);
+  errno = 0;
+  return luaL_fileresult(L, fflush(f) == 0, NULL);
+}
+
+
+static int f_flush (lua_State *L) {
+  FILE *f = tofile(L);
+  errno = 0;
+  return luaL_fileresult(L, fflush(f) == 0, NULL);
+}
+
+
+/*
+** functions for 'io' library
+*/
+static const luaL_Reg iolib[] = {
+  {"close", io_close},
+  {"flush", io_flush},
+  {"input", io_input},
+  {"lines", io_lines},
+  {"open", io_open},
+  {"output", io_output},
+  {"popen", io_popen},
+  {"read", io_read},
+  {"tmpfile", io_tmpfile},
+  {"type", io_type},
+  {"write", io_write},
+  {NULL, NULL}
+};
+
+
+/*
+** methods for file handles
+*/
+static const luaL_Reg meth[] = {
+  {"read", f_read},
+  {"write", f_write},
+  {"lines", f_lines},
+  {"flush", f_flush},
+  {"seek", f_seek},
+  {"close", f_close},
+  {"setvbuf", f_setvbuf},
+  {NULL, NULL}
+};
+
+
+/*
+** metamethods for file handles
+*/
+static const luaL_Reg metameth[] = {
+  {"__index", NULL},  /* placeholder */
+  {"__gc", f_gc},
+  {"__close", f_gc},
+  {"__tostring", f_tostring},
+  {NULL, NULL}
+};
+
+
+static void createmeta (lua_State *L) {
+  luaL_newmetatable(L, LUA_FILEHANDLE);  /* metatable for file handles */
+  luaL_setfuncs(L, metameth, 0);  /* add metamethods to new metatable */
+  luaL_newlibtable(L, meth);  /* create method table */
+  luaL_setfuncs(L, meth, 0);  /* add file methods to method table */
+  lua_setfield(L, -2, "__index");  /* metatable.__index = method table */
+  lua_pop(L, 1);  /* pop metatable */
+}
+
+
+/*
+** function to (not) close the standard files stdin, stdout, and stderr
+*/
+static int io_noclose (lua_State *L) {
+  LStream *p = tolstream(L);
+  p->closef = &io_noclose;  /* keep file opened */
+  luaL_pushfail(L);
+  lua_pushliteral(L, "cannot close standard file");
+  return 2;
+}
+
+
+static void createstdfile (lua_State *L, FILE *f, const char *k,
+                           const char *fname) {
+  LStream *p = newprefile(L);
+  p->f = f;
+  p->closef = &io_noclose;
+  if (k != NULL) {
+    lua_pushvalue(L, -1);
+    lua_setfield(L, LUA_REGISTRYINDEX, k);  /* add file to registry */
+  }
+  lua_setfield(L, -2, fname);  /* add file to module */
+}
+
+
+LUAMOD_API int luaopen_io (lua_State *L) {
+  luaL_newlib(L, iolib);  /* new module */
+  createmeta(L);
+  /* create (and set) default files */
+  createstdfile(L, stdin, IO_INPUT, "stdin");
+  createstdfile(L, stdout, IO_OUTPUT, "stdout");
+  createstdfile(L, stderr, NULL, "stderr");
+  return 1;
+}
+
@@ -0,0 +1,112 @@
+/*
+** $Id: ljumptab.h $
+** Jump Table for the Lua interpreter
+** See Copyright Notice in lua.h
+*/
+
+
+#undef vmdispatch
+#undef vmcase
+#undef vmbreak
+
+#define vmdispatch(x)     goto *disptab[x];
+
+#define vmcase(l)     L_##l:
+
+#define vmbreak		vmfetch(); vmdispatch(GET_OPCODE(i));
+
+
+static const void *const disptab[NUM_OPCODES] = {
+
+#if 0
+** you can update the following list with this command:
+**
+**  sed -n '/^OP_/\!d; s/OP_/\&\&L_OP_/ ; s/,.*/,/ ; s/\/.*// ; p'  lopcodes.h
+**
+#endif
+
+&&L_OP_MOVE,
+&&L_OP_LOADI,
+&&L_OP_LOADF,
+&&L_OP_LOADK,
+&&L_OP_LOADKX,
+&&L_OP_LOADFALSE,
+&&L_OP_LFALSESKIP,
+&&L_OP_LOADTRUE,
+&&L_OP_LOADNIL,
+&&L_OP_GETUPVAL,
+&&L_OP_SETUPVAL,
+&&L_OP_GETTABUP,
+&&L_OP_GETTABLE,
+&&L_OP_GETI,
+&&L_OP_GETFIELD,
+&&L_OP_SETTABUP,
+&&L_OP_SETTABLE,
+&&L_OP_SETI,
+&&L_OP_SETFIELD,
+&&L_OP_NEWTABLE,
+&&L_OP_SELF,
+&&L_OP_ADDI,
+&&L_OP_ADDK,
+&&L_OP_SUBK,
+&&L_OP_MULK,
+&&L_OP_MODK,
+&&L_OP_POWK,
+&&L_OP_DIVK,
+&&L_OP_IDIVK,
+&&L_OP_BANDK,
+&&L_OP_BORK,
+&&L_OP_BXORK,
+&&L_OP_SHRI,
+&&L_OP_SHLI,
+&&L_OP_ADD,
+&&L_OP_SUB,
+&&L_OP_MUL,
+&&L_OP_MOD,
+&&L_OP_POW,
+&&L_OP_DIV,
+&&L_OP_IDIV,
+&&L_OP_BAND,
+&&L_OP_BOR,
+&&L_OP_BXOR,
+&&L_OP_SHL,
+&&L_OP_SHR,
+&&L_OP_MMBIN,
+&&L_OP_MMBINI,
+&&L_OP_MMBINK,
+&&L_OP_UNM,
+&&L_OP_BNOT,
+&&L_OP_NOT,
+&&L_OP_LEN,
+&&L_OP_CONCAT,
+&&L_OP_CLOSE,
+&&L_OP_TBC,
+&&L_OP_JMP,
+&&L_OP_EQ,
+&&L_OP_LT,
+&&L_OP_LE,
+&&L_OP_EQK,
+&&L_OP_EQI,
+&&L_OP_LTI,
+&&L_OP_LEI,
+&&L_OP_GTI,
+&&L_OP_GEI,
+&&L_OP_TEST,
+&&L_OP_TESTSET,
+&&L_OP_CALL,
+&&L_OP_TAILCALL,
+&&L_OP_RETURN,
+&&L_OP_RETURN0,
+&&L_OP_RETURN1,
+&&L_OP_FORLOOP,
+&&L_OP_FORPREP,
+&&L_OP_TFORPREP,
+&&L_OP_TFORCALL,
+&&L_OP_TFORLOOP,
+&&L_OP_SETLIST,
+&&L_OP_CLOSURE,
+&&L_OP_VARARG,
+&&L_OP_VARARGPREP,
+&&L_OP_EXTRAARG
+
+};
@@ -0,0 +1,581 @@
+/*
+** $Id: llex.c $
+** Lexical Analyzer
+** See Copyright Notice in lua.h
+*/
+
+#define llex_c
+#define LUA_CORE
+
+#include "lprefix.h"
+
+
+#include <locale.h>
+#include <string.h>
+
+#include "lua.h"
+
+#include "lctype.h"
+#include "ldebug.h"
+#include "ldo.h"
+#include "lgc.h"
+#include "llex.h"
+#include "lobject.h"
+#include "lparser.h"
+#include "lstate.h"
+#include "lstring.h"
+#include "ltable.h"
+#include "lzio.h"
+
+
+
+#define next(ls)	(ls->current = zgetc(ls->z))
+
+
+
+#define currIsNewline(ls)	(ls->current == '\n' || ls->current == '\r')
+
+
+/* ORDER RESERVED */
+static const char *const luaX_tokens [] = {
+    "and", "break", "do", "else", "elseif",
+    "end", "false", "for", "function", "goto", "if",
+    "in", "local", "nil", "not", "or", "repeat",
+    "return", "then", "true", "until", "while",
+    "//", "..", "...", "==", ">=", "<=", "~=",
+    "<<", ">>", "::", "<eof>",
+    "<number>", "<integer>", "<name>", "<string>"
+};
+
+
+#define save_and_next(ls) (save(ls, ls->current), next(ls))
+
+
+static l_noret lexerror (LexState *ls, const char *msg, int token);
+
+
+static void save (LexState *ls, int c) {
+  Mbuffer *b = ls->buff;
+  if (luaZ_bufflen(b) + 1 > luaZ_sizebuffer(b)) {
+    size_t newsize;
+    if (luaZ_sizebuffer(b) >= MAX_SIZE/2)
+      lexerror(ls, "lexical element too long", 0);
+    newsize = luaZ_sizebuffer(b) * 2;
+    luaZ_resizebuffer(ls->L, b, newsize);
+  }
+  b->buffer[luaZ_bufflen(b)++] = cast_char(c);
+}
+
+
+void luaX_init (lua_State *L) {
+  int i;
+  TString *e = luaS_newliteral(L, LUA_ENV);  /* create env name */
+  luaC_fix(L, obj2gco(e));  /* never collect this name */
+  for (i=0; i<NUM_RESERVED; i++) {
+    TString *ts = luaS_new(L, luaX_tokens[i]);
+    luaC_fix(L, obj2gco(ts));  /* reserved words are never collected */
+    ts->extra = cast_byte(i+1);  /* reserved word */
+  }
+}
+
+
+const char *luaX_token2str (LexState *ls, int token) {
+  if (token < FIRST_RESERVED) {  /* single-byte symbols? */
+    if (lisprint(token))
+      return luaO_pushfstring(ls->L, "'%c'", token);
+    else  /* control character */
+      return luaO_pushfstring(ls->L, "'<\\%d>'", token);
+  }
+  else {
+    const char *s = luaX_tokens[token - FIRST_RESERVED];
+    if (token < TK_EOS)  /* fixed format (symbols and reserved words)? */
+      return luaO_pushfstring(ls->L, "'%s'", s);
+    else  /* names, strings, and numerals */
+      return s;
+  }
+}
+
+
+static const char *txtToken (LexState *ls, int token) {
+  switch (token) {
+    case TK_NAME: case TK_STRING:
+    case TK_FLT: case TK_INT:
+      save(ls, '\0');
+      return luaO_pushfstring(ls->L, "'%s'", luaZ_buffer(ls->buff));
+    default:
+      return luaX_token2str(ls, token);
+  }
+}
+
+
+static l_noret lexerror (LexState *ls, const char *msg, int token) {
+  msg = luaG_addinfo(ls->L, msg, ls->source, ls->linenumber);
+  if (token)
+    luaO_pushfstring(ls->L, "%s near %s", msg, txtToken(ls, token));
+  luaD_throw(ls->L, LUA_ERRSYNTAX);
+}
+
+
+l_noret luaX_syntaxerror (LexState *ls, const char *msg) {
+  lexerror(ls, msg, ls->t.token);
+}
+
+
+/*
+** Creates a new string and anchors it in scanner's table so that it
+** will not be collected until the end of the compilation; by that time
+** it should be anchored somewhere. It also internalizes long strings,
+** ensuring there is only one copy of each unique string.  The table
+** here is used as a set: the string enters as the key, while its value
+** is irrelevant. We use the string itself as the value only because it
+** is a TValue readily available. Later, the code generation can change
+** this value.
+*/
+TString *luaX_newstring (LexState *ls, const char *str, size_t l) {
+  lua_State *L = ls->L;
+  TString *ts = luaS_newlstr(L, str, l);  /* create new string */
+  const TValue *o = luaH_getstr(ls->h, ts);
+  if (!ttisnil(o))  /* string already present? */
+    ts = keystrval(nodefromval(o));  /* get saved copy */
+  else {  /* not in use yet */
+    TValue *stv = s2v(L->top.p++);  /* reserve stack space for string */
+    setsvalue(L, stv, ts);  /* temporarily anchor the string */
+    luaH_finishset(L, ls->h, stv, o, stv);  /* t[string] = string */
+    /* table is not a metatable, so it does not need to invalidate cache */
+    luaC_checkGC(L);
+    L->top.p--;  /* remove string from stack */
+  }
+  return ts;
+}
+
+
+/*
+** increment line number and skips newline sequence (any of
+** \n, \r, \n\r, or \r\n)
+*/
+static void inclinenumber (LexState *ls) {
+  int old = ls->current;
+  lua_assert(currIsNewline(ls));
+  next(ls);  /* skip '\n' or '\r' */
+  if (currIsNewline(ls) && ls->current != old)
+    next(ls);  /* skip '\n\r' or '\r\n' */
+  if (++ls->linenumber >= MAX_INT)
+    lexerror(ls, "chunk has too many lines", 0);
+}
+
+
+void luaX_setinput (lua_State *L, LexState *ls, ZIO *z, TString *source,
+                    int firstchar) {
+  ls->t.token = 0;
+  ls->L = L;
+  ls->current = firstchar;
+  ls->lookahead.token = TK_EOS;  /* no look-ahead token */
+  ls->z = z;
+  ls->fs = NULL;
+  ls->linenumber = 1;
+  ls->lastline = 1;
+  ls->source = source;
+  ls->envn = luaS_newliteral(L, LUA_ENV);  /* get env name */
+  luaZ_resizebuffer(ls->L, ls->buff, LUA_MINBUFFER);  /* initialize buffer */
+}
+
+
+
+/*
+** =======================================================
+** LEXICAL ANALYZER
+** =======================================================
+*/
+
+
+static int check_next1 (LexState *ls, int c) {
+  if (ls->current == c) {
+    next(ls);
+    return 1;
+  }
+  else return 0;
+}
+
+
+/*
+** Check whether current char is in set 'set' (with two chars) and
+** saves it
+*/
+static int check_next2 (LexState *ls, const char *set) {
+  lua_assert(set[2] == '\0');
+  if (ls->current == set[0] || ls->current == set[1]) {
+    save_and_next(ls);
+    return 1;
+  }
+  else return 0;
+}
+
+
+/* LUA_NUMBER */
+/*
+** This function is quite liberal in what it accepts, as 'luaO_str2num'
+** will reject ill-formed numerals. Roughly, it accepts the following
+** pattern:
+**
+**   %d(%x|%.|([Ee][+-]?))* | 0[Xx](%x|%.|([Pp][+-]?))*
+**
+** The only tricky part is to accept [+-] only after a valid exponent
+** mark, to avoid reading '3-4' or '0xe+1' as a single number.
+**
+** The caller might have already read an initial dot.
+*/
+static int read_numeral (LexState *ls, SemInfo *seminfo) {
+  TValue obj;
+  const char *expo = "Ee";
+  int first = ls->current;
+  lua_assert(lisdigit(ls->current));
+  save_and_next(ls);
+  if (first == '0' && check_next2(ls, "xX"))  /* hexadecimal? */
+    expo = "Pp";
+  for (;;) {
+    if (check_next2(ls, expo))  /* exponent mark? */
+      check_next2(ls, "-+");  /* optional exponent sign */
+    else if (lisxdigit(ls->current) || ls->current == '.')  /* '%x|%.' */
+      save_and_next(ls);
+    else break;
+  }
+  if (lislalpha(ls->current))  /* is numeral touching a letter? */
+    save_and_next(ls);  /* force an error */
+  save(ls, '\0');
+  if (luaO_str2num(luaZ_buffer(ls->buff), &obj) == 0)  /* format error? */
+    lexerror(ls, "malformed number", TK_FLT);
+  if (ttisinteger(&obj)) {
+    seminfo->i = ivalue(&obj);
+    return TK_INT;
+  }
+  else {
+    lua_assert(ttisfloat(&obj));
+    seminfo->r = fltvalue(&obj);
+    return TK_FLT;
+  }
+}
+
+
+/*
+** read a sequence '[=*[' or ']=*]', leaving the last bracket. If
+** sequence is well formed, return its number of '='s + 2; otherwise,
+** return 1 if it is a single bracket (no '='s and no 2nd bracket);
+** otherwise (an unfinished '[==...') return 0.
+*/
+static size_t skip_sep (LexState *ls) {
+  size_t count = 0;
+  int s = ls->current;
+  lua_assert(s == '[' || s == ']');
+  save_and_next(ls);
+  while (ls->current == '=') {
+    save_and_next(ls);
+    count++;
+  }
+  return (ls->current == s) ? count + 2
+         : (count == 0) ? 1
+         : 0;
+}
+
+
+static void read_long_string (LexState *ls, SemInfo *seminfo, size_t sep) {
+  int line = ls->linenumber;  /* initial line (for error message) */
+  save_and_next(ls);  /* skip 2nd '[' */
+  if (currIsNewline(ls))  /* string starts with a newline? */
+    inclinenumber(ls);  /* skip it */
+  for (;;) {
+    switch (ls->current) {
+      case EOZ: {  /* error */
+        const char *what = (seminfo ? "string" : "comment");
+        const char *msg = luaO_pushfstring(ls->L,
+                     "unfinished long %s (starting at line %d)", what, line);
+        lexerror(ls, msg, TK_EOS);
+        break;  /* to avoid warnings */
+      }
+      case ']': {
+        if (skip_sep(ls) == sep) {
+          save_and_next(ls);  /* skip 2nd ']' */
+          goto endloop;
+        }
+        break;
+      }
+      case '\n': case '\r': {
+        save(ls, '\n');
+        inclinenumber(ls);
+        if (!seminfo) luaZ_resetbuffer(ls->buff);  /* avoid wasting space */
+        break;
+      }
+      default: {
+        if (seminfo) save_and_next(ls);
+        else next(ls);
+      }
+    }
+  } endloop:
+  if (seminfo)
+    seminfo->ts = luaX_newstring(ls, luaZ_buffer(ls->buff) + sep,
+                                     luaZ_bufflen(ls->buff) - 2 * sep);
+}
+
+
+static void esccheck (LexState *ls, int c, const char *msg) {
+  if (!c) {
+    if (ls->current != EOZ)
+      save_and_next(ls);  /* add current to buffer for error message */
+    lexerror(ls, msg, TK_STRING);
+  }
+}
+
+
+static int gethexa (LexState *ls) {
+  save_and_next(ls);
+  esccheck (ls, lisxdigit(ls->current), "hexadecimal digit expected");
+  return luaO_hexavalue(ls->current);
+}
+
+
+static int readhexaesc (LexState *ls) {
+  int r = gethexa(ls);
+  r = (r << 4) + gethexa(ls);
+  luaZ_buffremove(ls->buff, 2);  /* remove saved chars from buffer */
+  return r;
+}
+
+
+static unsigned long readutf8esc (LexState *ls) {
+  unsigned long r;
+  int i = 4;  /* chars to be removed: '\', 'u', '{', and first digit */
+  save_and_next(ls);  /* skip 'u' */
+  esccheck(ls, ls->current == '{', "missing '{'");
+  r = gethexa(ls);  /* must have at least one digit */
+  while (cast_void(save_and_next(ls)), lisxdigit(ls->current)) {
+    i++;
+    esccheck(ls, r <= (0x7FFFFFFFu >> 4), "UTF-8 value too large");
+    r = (r << 4) + luaO_hexavalue(ls->current);
+  }
+  esccheck(ls, ls->current == '}', "missing '}'");
+  next(ls);  /* skip '}' */
+  luaZ_buffremove(ls->buff, i);  /* remove saved chars from buffer */
+  return r;
+}
+
+
+static void utf8esc (LexState *ls) {
+  char buff[UTF8BUFFSZ];
+  int n = luaO_utf8esc(buff, readutf8esc(ls));
+  for (; n > 0; n--)  /* add 'buff' to string */
+    save(ls, buff[UTF8BUFFSZ - n]);
+}
+
+
+static int readdecesc (LexState *ls) {
+  int i;
+  int r = 0;  /* result accumulator */
+  for (i = 0; i < 3 && lisdigit(ls->current); i++) {  /* read up to 3 digits */
+    r = 10*r + ls->current - '0';
+    save_and_next(ls);
+  }
+  esccheck(ls, r <= UCHAR_MAX, "decimal escape too large");
+  luaZ_buffremove(ls->buff, i);  /* remove read digits from buffer */
+  return r;
+}
+
+
+static void read_string (LexState *ls, int del, SemInfo *seminfo) {
+  save_and_next(ls);  /* keep delimiter (for error messages) */
+  while (ls->current != del) {
+    switch (ls->current) {
+      case EOZ:
+        lexerror(ls, "unfinished string", TK_EOS);
+        break;  /* to avoid warnings */
+      case '\n':
+      case '\r':
+        lexerror(ls, "unfinished string", TK_STRING);
+        break;  /* to avoid warnings */
+      case '\\': {  /* escape sequences */
+        int c;  /* final character to be saved */
+        save_and_next(ls);  /* keep '\\' for error messages */
+        switch (ls->current) {
+          case 'a': c = '\a'; goto read_save;
+          case 'b': c = '\b'; goto read_save;
+          case 'f': c = '\f'; goto read_save;
+          case 'n': c = '\n'; goto read_save;
+          case 'r': c = '\r'; goto read_save;
+          case 't': c = '\t'; goto read_save;
+          case 'v': c = '\v'; goto read_save;
+          case 'x': c = readhexaesc(ls); goto read_save;
+          case 'u': utf8esc(ls);  goto no_save;
+          case '\n': case '\r':
+            inclinenumber(ls); c = '\n'; goto only_save;
+          case '\\': case '\"': case '\'':
+            c = ls->current; goto read_save;
+          case EOZ: goto no_save;  /* will raise an error next loop */
+          case 'z': {  /* zap following span of spaces */
+            luaZ_buffremove(ls->buff, 1);  /* remove '\\' */
+            next(ls);  /* skip the 'z' */
+            while (lisspace(ls->current)) {
+              if (currIsNewline(ls)) inclinenumber(ls);
+              else next(ls);
+            }
+            goto no_save;
+          }
+          default: {
+            esccheck(ls, lisdigit(ls->current), "invalid escape sequence");
+            c = readdecesc(ls);  /* digital escape '\ddd' */
+            goto only_save;
+          }
+        }
+       read_save:
+         next(ls);
+         /* go through */
+       only_save:
+         luaZ_buffremove(ls->buff, 1);  /* remove '\\' */
+         save(ls, c);
+         /* go through */
+       no_save: break;
+      }
+      default:
+        save_and_next(ls);
+    }
+  }
+  save_and_next(ls);  /* skip delimiter */
+  seminfo->ts = luaX_newstring(ls, luaZ_buffer(ls->buff) + 1,
+                                   luaZ_bufflen(ls->buff) - 2);
+}
+
+
+static int llex (LexState *ls, SemInfo *seminfo) {
+  luaZ_resetbuffer(ls->buff);
+  for (;;) {
+    switch (ls->current) {
+      case '\n': case '\r': {  /* line breaks */
+        inclinenumber(ls);
+        break;
+      }
+      case ' ': case '\f': case '\t': case '\v': {  /* spaces */
+        next(ls);
+        break;
+      }
+      case '-': {  /* '-' or '--' (comment) */
+        next(ls);
+        if (ls->current != '-') return '-';
+        /* else is a comment */
+        next(ls);
+        if (ls->current == '[') {  /* long comment? */
+          size_t sep = skip_sep(ls);
+          luaZ_resetbuffer(ls->buff);  /* 'skip_sep' may dirty the buffer */
+          if (sep >= 2) {
+            read_long_string(ls, NULL, sep);  /* skip long comment */
+            luaZ_resetbuffer(ls->buff);  /* previous call may dirty the buff. */
+            break;
+          }
+        }
+        /* else short comment */
+        while (!currIsNewline(ls) && ls->current != EOZ)
+          next(ls);  /* skip until end of line (or end of file) */
+        break;
+      }
+      case '[': {  /* long string or simply '[' */
+        size_t sep = skip_sep(ls);
+        if (sep >= 2) {
+          read_long_string(ls, seminfo, sep);
+          return TK_STRING;
+        }
+        else if (sep == 0)  /* '[=...' missing second bracket? */
+          lexerror(ls, "invalid long string delimiter", TK_STRING);
+        return '[';
+      }
+      case '=': {
+        next(ls);
+        if (check_next1(ls, '=')) return TK_EQ;  /* '==' */
+        else return '=';
+      }
+      case '<': {
+        next(ls);
+        if (check_next1(ls, '=')) return TK_LE;  /* '<=' */
+        else if (check_next1(ls, '<')) return TK_SHL;  /* '<<' */
+        else return '<';
+      }
+      case '>': {
+        next(ls);
+        if (check_next1(ls, '=')) return TK_GE;  /* '>=' */
+        else if (check_next1(ls, '>')) return TK_SHR;  /* '>>' */
+        else return '>';
+      }
+      case '/': {
+        next(ls);
+        if (check_next1(ls, '/')) return TK_IDIV;  /* '//' */
+        else return '/';
+      }
+      case '~': {
+        next(ls);
+        if (check_next1(ls, '=')) return TK_NE;  /* '~=' */
+        else return '~';
+      }
+      case ':': {
+        next(ls);
+        if (check_next1(ls, ':')) return TK_DBCOLON;  /* '::' */
+        else return ':';
+      }
+      case '"': case '\'': {  /* short literal strings */
+        read_string(ls, ls->current, seminfo);
+        return TK_STRING;
+      }
+      case '.': {  /* '.', '..', '...', or number */
+        save_and_next(ls);
+        if (check_next1(ls, '.')) {
+          if (check_next1(ls, '.'))
+            return TK_DOTS;   /* '...' */
+          else return TK_CONCAT;   /* '..' */
+        }
+        else if (!lisdigit(ls->current)) return '.';
+        else return read_numeral(ls, seminfo);
+      }
+      case '0': case '1': case '2': case '3': case '4':
+      case '5': case '6': case '7': case '8': case '9': {
+        return read_numeral(ls, seminfo);
+      }
+      case EOZ: {
+        return TK_EOS;
+      }
+      default: {
+        if (lislalpha(ls->current)) {  /* identifier or reserved word? */
+          TString *ts;
+          do {
+            save_and_next(ls);
+          } while (lislalnum(ls->current));
+          ts = luaX_newstring(ls, luaZ_buffer(ls->buff),
+                                  luaZ_bufflen(ls->buff));
+          seminfo->ts = ts;
+          if (isreserved(ts))  /* reserved word? */
+            return ts->extra - 1 + FIRST_RESERVED;
+          else {
+            return TK_NAME;
+          }
+        }
+        else {  /* single-char tokens ('+', '*', '%', '{', '}', ...) */
+          int c = ls->current;
+          next(ls);
+          return c;
+        }
+      }
+    }
+  }
+}
+
+
+void luaX_next (LexState *ls) {
+  ls->lastline = ls->linenumber;
+  if (ls->lookahead.token != TK_EOS) {  /* is there a look-ahead token? */
+    ls->t = ls->lookahead;  /* use this one */
+    ls->lookahead.token = TK_EOS;  /* and discharge it */
+  }
+  else
+    ls->t.token = llex(ls, &ls->t.seminfo);  /* read next token */
+}
+
+
+int luaX_lookahead (LexState *ls) {
+  lua_assert(ls->lookahead.token == TK_EOS);
+  ls->lookahead.token = llex(ls, &ls->lookahead.seminfo);
+  return ls->lookahead.token;
+}
+
@@ -0,0 +1,91 @@
+/*
+** $Id: llex.h $
+** Lexical Analyzer
+** See Copyright Notice in lua.h
+*/
+
+#ifndef llex_h
+#define llex_h
+
+#include <limits.h>
+
+#include "lobject.h"
+#include "lzio.h"
+
+
+/*
+** Single-char tokens (terminal symbols) are represented by their own
+** numeric code. Other tokens start at the following value.
+*/
+#define FIRST_RESERVED	(UCHAR_MAX + 1)
+
+
+#if !defined(LUA_ENV)
+#define LUA_ENV		"_ENV"
+#endif
+
+
+/*
+* WARNING: if you change the order of this enumeration,
+* grep "ORDER RESERVED"
+*/
+enum RESERVED {
+  /* terminal symbols denoted by reserved words */
+  TK_AND = FIRST_RESERVED, TK_BREAK,
+  TK_DO, TK_ELSE, TK_ELSEIF, TK_END, TK_FALSE, TK_FOR, TK_FUNCTION,
+  TK_GOTO, TK_IF, TK_IN, TK_LOCAL, TK_NIL, TK_NOT, TK_OR, TK_REPEAT,
+  TK_RETURN, TK_THEN, TK_TRUE, TK_UNTIL, TK_WHILE,
+  /* other terminal symbols */
+  TK_IDIV, TK_CONCAT, TK_DOTS, TK_EQ, TK_GE, TK_LE, TK_NE,
+  TK_SHL, TK_SHR,
+  TK_DBCOLON, TK_EOS,
+  TK_FLT, TK_INT, TK_NAME, TK_STRING
+};
+
+/* number of reserved words */
+#define NUM_RESERVED	(cast_int(TK_WHILE-FIRST_RESERVED + 1))
+
+
+typedef union {
+  lua_Number r;
+  lua_Integer i;
+  TString *ts;
+} SemInfo;  /* semantics information */
+
+
+typedef struct Token {
+  int token;
+  SemInfo seminfo;
+} Token;
+
+
+/* state of the lexer plus state of the parser when shared by all
+   functions */
+typedef struct LexState {
+  int current;  /* current character (charint) */
+  int linenumber;  /* input line counter */
+  int lastline;  /* line of last token 'consumed' */
+  Token t;  /* current token */
+  Token lookahead;  /* look ahead token */
+  struct FuncState *fs;  /* current function (parser) */
+  struct lua_State *L;
+  ZIO *z;  /* input stream */
+  Mbuffer *buff;  /* buffer for tokens */
+  Table *h;  /* to avoid collection/reuse strings */
+  struct Dyndata *dyd;  /* dynamic structures used by the parser */
+  TString *source;  /* current source name */
+  TString *envn;  /* environment variable name */
+} LexState;
+
+
+LUAI_FUNC void luaX_init (lua_State *L);
+LUAI_FUNC void luaX_setinput (lua_State *L, LexState *ls, ZIO *z,
+                              TString *source, int firstchar);
+LUAI_FUNC TString *luaX_newstring (LexState *ls, const char *str, size_t l);
+LUAI_FUNC void luaX_next (LexState *ls);
+LUAI_FUNC int luaX_lookahead (LexState *ls);
+LUAI_FUNC l_noret luaX_syntaxerror (LexState *ls, const char *s);
+LUAI_FUNC const char *luaX_token2str (LexState *ls, int token);
+
+
+#endif
@@ -0,0 +1,380 @@
+/*
+** $Id: llimits.h $
+** Limits, basic types, and some other 'installation-dependent' definitions
+** See Copyright Notice in lua.h
+*/
+
+#ifndef llimits_h
+#define llimits_h
+
+
+#include <limits.h>
+#include <stddef.h>
+
+
+#include "lua.h"
+
+
+/*
+** 'lu_mem' and 'l_mem' are unsigned/signed integers big enough to count
+** the total memory used by Lua (in bytes). Usually, 'size_t' and
+** 'ptrdiff_t' should work, but we use 'long' for 16-bit machines.
+*/
+#if defined(LUAI_MEM)		/* { external definitions? */
+typedef LUAI_UMEM lu_mem;
+typedef LUAI_MEM l_mem;
+#elif LUAI_IS32INT	/* }{ */
+typedef size_t lu_mem;
+typedef ptrdiff_t l_mem;
+#else  /* 16-bit ints */	/* }{ */
+typedef unsigned long lu_mem;
+typedef long l_mem;
+#endif				/* } */
+
+
+/* chars used as small naturals (so that 'char' is reserved for characters) */
+typedef unsigned char lu_byte;
+typedef signed char ls_byte;
+
+
+/* maximum value for size_t */
+#define MAX_SIZET	((size_t)(~(size_t)0))
+
+/* maximum size visible for Lua (must be representable in a lua_Integer) */
+#define MAX_SIZE	(sizeof(size_t) < sizeof(lua_Integer) ? MAX_SIZET \
+                          : (size_t)(LUA_MAXINTEGER))
+
+
+#define MAX_LUMEM	((lu_mem)(~(lu_mem)0))
+
+#define MAX_LMEM	((l_mem)(MAX_LUMEM >> 1))
+
+
+#define MAX_INT		INT_MAX  /* maximum value of an int */
+
+
+/*
+** floor of the log2 of the maximum signed value for integral type 't'.
+** (That is, maximum 'n' such that '2^n' fits in the given signed type.)
+*/
+#define log2maxs(t)	(sizeof(t) * 8 - 2)
+
+
+/*
+** test whether an unsigned value is a power of 2 (or zero)
+*/
+#define ispow2(x)	(((x) & ((x) - 1)) == 0)
+
+
+/* number of chars of a literal string without the ending \0 */
+#define LL(x)   (sizeof(x)/sizeof(char) - 1)
+
+
+/*
+** conversion of pointer to unsigned integer: this is for hashing only;
+** there is no problem if the integer cannot hold the whole pointer
+** value. (In strict ISO C this may cause undefined behavior, but no
+** actual machine seems to bother.)
+*/
+#if !defined(LUA_USE_C89) && defined(__STDC_VERSION__) && \
+    __STDC_VERSION__ >= 199901L
+#include <stdint.h>
+#if defined(UINTPTR_MAX)  /* even in C99 this type is optional */
+#define L_P2I	uintptr_t
+#else  /* no 'intptr'? */
+#define L_P2I	uintmax_t  /* use the largest available integer */
+#endif
+#else  /* C89 option */
+#define L_P2I	size_t
+#endif
+
+#define point2uint(p)	((unsigned int)((L_P2I)(p) & UINT_MAX))
+
+
+
+/* types of 'usual argument conversions' for lua_Number and lua_Integer */
+typedef LUAI_UACNUMBER l_uacNumber;
+typedef LUAI_UACINT l_uacInt;
+
+
+/*
+** Internal assertions for in-house debugging
+*/
+#if defined LUAI_ASSERT
+#undef NDEBUG
+#include <assert.h>
+#define lua_assert(c)           assert(c)
+#endif
+
+#if defined(lua_assert)
+#define check_exp(c,e)		(lua_assert(c), (e))
+/* to avoid problems with conditions too long */
+#define lua_longassert(c)	((c) ? (void)0 : lua_assert(0))
+#else
+#define lua_assert(c)		((void)0)
+#define check_exp(c,e)		(e)
+#define lua_longassert(c)	((void)0)
+#endif
+
+/*
+** assertion for checking API calls
+*/
+#if !defined(luai_apicheck)
+#define luai_apicheck(l,e)	((void)l, lua_assert(e))
+#endif
+
+#define api_check(l,e,msg)	luai_apicheck(l,(e) && msg)
+
+
+/* macro to avoid warnings about unused variables */
+#if !defined(UNUSED)
+#define UNUSED(x)	((void)(x))
+#endif
+
+
+/* type casts (a macro highlights casts in the code) */
+#define cast(t, exp)	((t)(exp))
+
+#define cast_void(i)	cast(void, (i))
+#define cast_voidp(i)	cast(void *, (i))
+#define cast_num(i)	cast(lua_Number, (i))
+#define cast_int(i)	cast(int, (i))
+#define cast_uint(i)	cast(unsigned int, (i))
+#define cast_byte(i)	cast(lu_byte, (i))
+#define cast_uchar(i)	cast(unsigned char, (i))
+#define cast_char(i)	cast(char, (i))
+#define cast_charp(i)	cast(char *, (i))
+#define cast_sizet(i)	cast(size_t, (i))
+
+
+/* cast a signed lua_Integer to lua_Unsigned */
+#if !defined(l_castS2U)
+#define l_castS2U(i)	((lua_Unsigned)(i))
+#endif
+
+/*
+** cast a lua_Unsigned to a signed lua_Integer; this cast is
+** not strict ISO C, but two-complement architectures should
+** work fine.
+*/
+#if !defined(l_castU2S)
+#define l_castU2S(i)	((lua_Integer)(i))
+#endif
+
+
+/*
+** non-return type
+*/
+#if !defined(l_noret)
+
+#if defined(__GNUC__)
+#define l_noret		void __attribute__((noreturn))
+#elif defined(_MSC_VER) && _MSC_VER >= 1200
+#define l_noret		void __declspec(noreturn)
+#else
+#define l_noret		void
+#endif
+
+#endif
+
+
+/*
+** Inline functions
+*/
+#if !defined(LUA_USE_C89)
+#define l_inline	inline
+#elif defined(__GNUC__)
+#define l_inline	__inline__
+#else
+#define l_inline	/* empty */
+#endif
+
+#define l_sinline	static l_inline
+
+
+/*
+** type for virtual-machine instructions;
+** must be an unsigned with (at least) 4 bytes (see details in lopcodes.h)
+*/
+#if LUAI_IS32INT
+typedef unsigned int l_uint32;
+#else
+typedef unsigned long l_uint32;
+#endif
+
+typedef l_uint32 Instruction;
+
+
+
+/*
+** Maximum length for short strings, that is, strings that are
+** internalized. (Cannot be smaller than reserved words or tags for
+** metamethods, as these strings must be internalized;
+** #("function") = 8, #("__newindex") = 10.)
+*/
+#if !defined(LUAI_MAXSHORTLEN)
+#define LUAI_MAXSHORTLEN	40
+#endif
+
+
+/*
+** Initial size for the string table (must be power of 2).
+** The Lua core alone registers ~50 strings (reserved words +
+** metaevent keys + a few others). Libraries would typically add
+** a few dozens more.
+*/
+#if !defined(MINSTRTABSIZE)
+#define MINSTRTABSIZE	128
+#endif
+
+
+/*
+** Size of cache for strings in the API. 'N' is the number of
+** sets (better be a prime) and "M" is the size of each set (M == 1
+** makes a direct cache.)
+*/
+#if !defined(STRCACHE_N)
+#define STRCACHE_N		53
+#define STRCACHE_M		2
+#endif
+
+
+/* minimum size for string buffer */
+#if !defined(LUA_MINBUFFER)
+#define LUA_MINBUFFER	32
+#endif
+
+
+/*
+** Maximum depth for nested C calls, syntactical nested non-terminals,
+** and other features implemented through recursion in C. (Value must
+** fit in a 16-bit unsigned integer. It must also be compatible with
+** the size of the C stack.)
+*/
+#if !defined(LUAI_MAXCCALLS)
+#define LUAI_MAXCCALLS		200
+#endif
+
+
+/*
+** macros that are executed whenever program enters the Lua core
+** ('lua_lock') and leaves the core ('lua_unlock')
+*/
+#if !defined(lua_lock)
+#define lua_lock(L)	((void) 0)
+#define lua_unlock(L)	((void) 0)
+#endif
+
+/*
+** macro executed during Lua functions at points where the
+** function can yield.
+*/
+#if !defined(luai_threadyield)
+#define luai_threadyield(L)	{lua_unlock(L); lua_lock(L);}
+#endif
+
+
+/*
+** these macros allow user-specific actions when a thread is
+** created/deleted/resumed/yielded.
+*/
+#if !defined(luai_userstateopen)
+#define luai_userstateopen(L)		((void)L)
+#endif
+
+#if !defined(luai_userstateclose)
+#define luai_userstateclose(L)		((void)L)
+#endif
+
+#if !defined(luai_userstatethread)
+#define luai_userstatethread(L,L1)	((void)L)
+#endif
+
+#if !defined(luai_userstatefree)
+#define luai_userstatefree(L,L1)	((void)L)
+#endif
+
+#if !defined(luai_userstateresume)
+#define luai_userstateresume(L,n)	((void)L)
+#endif
+
+#if !defined(luai_userstateyield)
+#define luai_userstateyield(L,n)	((void)L)
+#endif
+
+
+
+/*
+** The luai_num* macros define the primitive operations over numbers.
+*/
+
+/* floor division (defined as 'floor(a/b)') */
+#if !defined(luai_numidiv)
+#define luai_numidiv(L,a,b)     ((void)L, l_floor(luai_numdiv(L,a,b)))
+#endif
+
+/* float division */
+#if !defined(luai_numdiv)
+#define luai_numdiv(L,a,b)      ((a)/(b))
+#endif
+
+/*
+** modulo: defined as 'a - floor(a/b)*b'; the direct computation
+** using this definition has several problems with rounding errors,
+** so it is better to use 'fmod'. 'fmod' gives the result of
+** 'a - trunc(a/b)*b', and therefore must be corrected when
+** 'trunc(a/b) ~= floor(a/b)'. That happens when the division has a
+** non-integer negative result: non-integer result is equivalent to
+** a non-zero remainder 'm'; negative result is equivalent to 'a' and
+** 'b' with different signs, or 'm' and 'b' with different signs
+** (as the result 'm' of 'fmod' has the same sign of 'a').
+*/
+#if !defined(luai_nummod)
+#define luai_nummod(L,a,b,m)  \
+  { (void)L; (m) = l_mathop(fmod)(a,b); \
+    if (((m) > 0) ? (b) < 0 : ((m) < 0 && (b) > 0)) (m) += (b); }
+#endif
+
+/* exponentiation */
+#if !defined(luai_numpow)
+#define luai_numpow(L,a,b)  \
+  ((void)L, (b == 2) ? (a)*(a) : l_mathop(pow)(a,b))
+#endif
+
+/* the others are quite standard operations */
+#if !defined(luai_numadd)
+#define luai_numadd(L,a,b)      ((a)+(b))
+#define luai_numsub(L,a,b)      ((a)-(b))
+#define luai_nummul(L,a,b)      ((a)*(b))
+#define luai_numunm(L,a)        (-(a))
+#define luai_numeq(a,b)         ((a)==(b))
+#define luai_numlt(a,b)         ((a)<(b))
+#define luai_numle(a,b)         ((a)<=(b))
+#define luai_numgt(a,b)         ((a)>(b))
+#define luai_numge(a,b)         ((a)>=(b))
+#define luai_numisnan(a)        (!luai_numeq((a), (a)))
+#endif
+
+
+
+
+
+/*
+** macro to control inclusion of some hard tests on stack reallocation
+*/
+#if !defined(HARDSTACKTESTS)
+#define condmovestack(L,pre,pos)	((void)0)
+#else
+/* realloc stack keeping its size */
+#define condmovestack(L,pre,pos)  \
+  { int sz_ = stacksize(L); pre; luaD_reallocstack((L), sz_, 0); pos; }
+#endif
+
+#if !defined(HARDMEMTESTS)
+#define condchangemem(L,pre,pos)	((void)0)
+#else
+#define condchangemem(L,pre,pos)  \
+	{ if (gcrunning(G(L))) { pre; luaC_fullgc(L, 0); pos; } }
+#endif
+
+#endif
@@ -0,0 +1,781 @@
+/*
+** $Id: lmathlib.c $
+** Standard mathematical library
+** See Copyright Notice in lua.h
+*/
+
+#define lmathlib_c
+#define LUA_LIB
+
+#include "lprefix.h"
+
+
+#include <float.h>
+#include <limits.h>
+#include <math.h>
+#include <stdlib.h>
+#include <time.h>
+
+#include "lua.h"
+
+#include "lauxlib.h"
+#include "lualib.h"
+
+
+#undef PI
+#define PI	(l_mathop(3.141592653589793238462643383279502884))
+
+
+static int math_abs (lua_State *L) {
+  if (lua_isinteger(L, 1)) {
+    lua_Integer n = lua_tointeger(L, 1);
+    if (n < 0) n = (lua_Integer)(0u - (lua_Unsigned)n);
+    lua_pushinteger(L, n);
+  }
+  else
+    lua_pushnumber(L, l_mathop(fabs)(luaL_checknumber(L, 1)));
+  return 1;
+}
+
+static int math_sin (lua_State *L) {
+  lua_pushnumber(L, l_mathop(sin)(luaL_checknumber(L, 1)));
+  return 1;
+}
+
+static int math_cos (lua_State *L) {
+  lua_pushnumber(L, l_mathop(cos)(luaL_checknumber(L, 1)));
+  return 1;
+}
+
+static int math_tan (lua_State *L) {
+  lua_pushnumber(L, l_mathop(tan)(luaL_checknumber(L, 1)));
+  return 1;
+}
+
+static int math_asin (lua_State *L) {
+  lua_pushnumber(L, l_mathop(asin)(luaL_checknumber(L, 1)));
+  return 1;
+}
+
+static int math_acos (lua_State *L) {
+  lua_pushnumber(L, l_mathop(acos)(luaL_checknumber(L, 1)));
+  return 1;
+}
+
+static int math_atan (lua_State *L) {
+  lua_Number y = luaL_checknumber(L, 1);
+  lua_Number x = luaL_optnumber(L, 2, 1);
+  lua_pushnumber(L, l_mathop(atan2)(y, x));
+  return 1;
+}
+
+
+static int math_toint (lua_State *L) {
+  int valid;
+  lua_Integer n = lua_tointegerx(L, 1, &valid);
+  if (l_likely(valid))
+    lua_pushinteger(L, n);
+  else {
+    luaL_checkany(L, 1);
+    luaL_pushfail(L);  /* value is not convertible to integer */
+  }
+  return 1;
+}
+
+
+static void pushnumint (lua_State *L, lua_Number d) {
+  lua_Integer n;
+  if (lua_numbertointeger(d, &n))  /* does 'd' fit in an integer? */
+    lua_pushinteger(L, n);  /* result is integer */
+  else
+    lua_pushnumber(L, d);  /* result is float */
+}
+
+
+static int math_floor (lua_State *L) {
+  if (lua_isinteger(L, 1))
+    lua_settop(L, 1);  /* integer is its own floor */
+  else {
+    lua_Number d = l_mathop(floor)(luaL_checknumber(L, 1));
+    pushnumint(L, d);
+  }
+  return 1;
+}
+
+
+static int math_ceil (lua_State *L) {
+  if (lua_isinteger(L, 1))
+    lua_settop(L, 1);  /* integer is its own ceil */
+  else {
+    lua_Number d = l_mathop(ceil)(luaL_checknumber(L, 1));
+    pushnumint(L, d);
+  }
+  return 1;
+}
+
+
+static int math_fmod (lua_State *L) {
+  if (lua_isinteger(L, 1) && lua_isinteger(L, 2)) {
+    lua_Integer d = lua_tointeger(L, 2);
+    if ((lua_Unsigned)d + 1u <= 1u) {  /* special cases: -1 or 0 */
+      luaL_argcheck(L, d != 0, 2, "zero");
+      lua_pushinteger(L, 0);  /* avoid overflow with 0x80000... / -1 */
+    }
+    else
+      lua_pushinteger(L, lua_tointeger(L, 1) % d);
+  }
+  else
+    lua_pushnumber(L, l_mathop(fmod)(luaL_checknumber(L, 1),
+                                     luaL_checknumber(L, 2)));
+  return 1;
+}
+
+
+/*
+** next function does not use 'modf', avoiding problems with 'double*'
+** (which is not compatible with 'float*') when lua_Number is not
+** 'double'.
+*/
+static int math_modf (lua_State *L) {
+  if (lua_isinteger(L ,1)) {
+    lua_settop(L, 1);  /* number is its own integer part */
+    lua_pushnumber(L, 0);  /* no fractional part */
+  }
+  else {
+    lua_Number n = luaL_checknumber(L, 1);
+    /* integer part (rounds toward zero) */
+    lua_Number ip = (n < 0) ? l_mathop(ceil)(n) : l_mathop(floor)(n);
+    pushnumint(L, ip);
+    /* fractional part (test needed for inf/-inf) */
+    lua_pushnumber(L, (n == ip) ? l_mathop(0.0) : (n - ip));
+  }
+  return 2;
+}
+
+
+static int math_sqrt (lua_State *L) {
+  lua_pushnumber(L, l_mathop(sqrt)(luaL_checknumber(L, 1)));
+  return 1;
+}
+
+
+static int math_ult (lua_State *L) {
+  lua_Integer a = luaL_checkinteger(L, 1);
+  lua_Integer b = luaL_checkinteger(L, 2);
+  lua_pushboolean(L, (lua_Unsigned)a < (lua_Unsigned)b);
+  return 1;
+}
+
+static int math_log (lua_State *L) {
+  lua_Number x = luaL_checknumber(L, 1);
+  lua_Number res;
+  if (lua_isnoneornil(L, 2))
+    res = l_mathop(log)(x);
+  else {
+    lua_Number base = luaL_checknumber(L, 2);
+#if !defined(LUA_USE_C89)
+    if (base == l_mathop(2.0))
+      res = l_mathop(log2)(x);
+    else
+#endif
+    if (base == l_mathop(10.0))
+      res = l_mathop(log10)(x);
+    else
+      res = l_mathop(log)(x)/l_mathop(log)(base);
+  }
+  lua_pushnumber(L, res);
+  return 1;
+}
+
+static int math_exp (lua_State *L) {
+  lua_pushnumber(L, l_mathop(exp)(luaL_checknumber(L, 1)));
+  return 1;
+}
+
+static int math_deg (lua_State *L) {
+  lua_pushnumber(L, luaL_checknumber(L, 1) * (l_mathop(180.0) / PI));
+  return 1;
+}
+
+static int math_rad (lua_State *L) {
+  lua_pushnumber(L, luaL_checknumber(L, 1) * (PI / l_mathop(180.0)));
+  return 1;
+}
+
+
+static int math_min (lua_State *L) {
+  int n = lua_gettop(L);  /* number of arguments */
+  int imin = 1;  /* index of current minimum value */
+  int i;
+  luaL_argcheck(L, n >= 1, 1, "value expected");
+  for (i = 2; i <= n; i++) {
+    if (lua_compare(L, i, imin, LUA_OPLT))
+      imin = i;
+  }
+  lua_pushvalue(L, imin);
+  return 1;
+}
+
+
+static int math_max (lua_State *L) {
+  int n = lua_gettop(L);  /* number of arguments */
+  int imax = 1;  /* index of current maximum value */
+  int i;
+  luaL_argcheck(L, n >= 1, 1, "value expected");
+  for (i = 2; i <= n; i++) {
+    if (lua_compare(L, imax, i, LUA_OPLT))
+      imax = i;
+  }
+  lua_pushvalue(L, imax);
+  return 1;
+}
+
+
+static int math_type (lua_State *L) {
+  if (lua_type(L, 1) == LUA_TNUMBER)
+    lua_pushstring(L, (lua_isinteger(L, 1)) ? "integer" : "float");
+  else {
+    luaL_checkany(L, 1);
+    luaL_pushfail(L);
+  }
+  return 1;
+}
+
+
+
+/*
+** {==================================================================
+** Pseudo-Random Number Generator based on 'xoshiro256**'.
+** ===================================================================
+*/
+
+/*
+** This code uses lots of shifts. ANSI C does not allow shifts greater
+** than or equal to the width of the type being shifted, so some shifts
+** are written in convoluted ways to match that restriction. For
+** preprocessor tests, it assumes a width of 32 bits, so the maximum
+** shift there is 31 bits.
+*/
+
+
+/* number of binary digits in the mantissa of a float */
+#define FIGS	l_floatatt(MANT_DIG)
+
+#if FIGS > 64
+/* there are only 64 random bits; use them all */
+#undef FIGS
+#define FIGS	64
+#endif
+
+
+/*
+** LUA_RAND32 forces the use of 32-bit integers in the implementation
+** of the PRN generator (mainly for testing).
+*/
+#if !defined(LUA_RAND32) && !defined(Rand64)
+
+/* try to find an integer type with at least 64 bits */
+
+#if ((ULONG_MAX >> 31) >> 31) >= 3
+
+/* 'long' has at least 64 bits */
+#define Rand64		unsigned long
+#define SRand64		long
+
+#elif !defined(LUA_USE_C89) && defined(LLONG_MAX)
+
+/* there is a 'long long' type (which must have at least 64 bits) */
+#define Rand64		unsigned long long
+#define SRand64		long long
+
+#elif ((LUA_MAXUNSIGNED >> 31) >> 31) >= 3
+
+/* 'lua_Unsigned' has at least 64 bits */
+#define Rand64		lua_Unsigned
+#define SRand64		lua_Integer
+
+#endif
+
+#endif
+
+
+#if defined(Rand64)  /* { */
+
+/*
+** Standard implementation, using 64-bit integers.
+** If 'Rand64' has more than 64 bits, the extra bits do not interfere
+** with the 64 initial bits, except in a right shift. Moreover, the
+** final result has to discard the extra bits.
+*/
+
+/* avoid using extra bits when needed */
+#define trim64(x)	((x) & 0xffffffffffffffffu)
+
+
+/* rotate left 'x' by 'n' bits */
+static Rand64 rotl (Rand64 x, int n) {
+  return (x << n) | (trim64(x) >> (64 - n));
+}
+
+static Rand64 nextrand (Rand64 *state) {
+  Rand64 state0 = state[0];
+  Rand64 state1 = state[1];
+  Rand64 state2 = state[2] ^ state0;
+  Rand64 state3 = state[3] ^ state1;
+  Rand64 res = rotl(state1 * 5, 7) * 9;
+  state[0] = state0 ^ state3;
+  state[1] = state1 ^ state2;
+  state[2] = state2 ^ (state1 << 17);
+  state[3] = rotl(state3, 45);
+  return res;
+}
+
+
+/*
+** Convert bits from a random integer into a float in the
+** interval [0,1), getting the higher FIG bits from the
+** random unsigned integer and converting that to a float.
+** Some old Microsoft compilers cannot cast an unsigned long
+** to a floating-point number, so we use a signed long as an
+** intermediary. When lua_Number is float or double, the shift ensures
+** that 'sx' is non negative; in that case, a good compiler will remove
+** the correction.
+*/
+
+/* must throw out the extra (64 - FIGS) bits */
+#define shift64_FIG	(64 - FIGS)
+
+/* 2^(-FIGS) == 2^-1 / 2^(FIGS-1) */
+#define scaleFIG	(l_mathop(0.5) / ((Rand64)1 << (FIGS - 1)))
+
+static lua_Number I2d (Rand64 x) {
+  SRand64 sx = (SRand64)(trim64(x) >> shift64_FIG);
+  lua_Number res = (lua_Number)(sx) * scaleFIG;
+  if (sx < 0)
+    res += l_mathop(1.0);  /* correct the two's complement if negative */
+  lua_assert(0 <= res && res < 1);
+  return res;
+}
+
+/* convert a 'Rand64' to a 'lua_Unsigned' */
+#define I2UInt(x)	((lua_Unsigned)trim64(x))
+
+/* convert a 'lua_Unsigned' to a 'Rand64' */
+#define Int2I(x)	((Rand64)(x))
+
+
+#else	/* no 'Rand64'   }{ */
+
+/* get an integer with at least 32 bits */
+#if LUAI_IS32INT
+typedef unsigned int lu_int32;
+#else
+typedef unsigned long lu_int32;
+#endif
+
+
+/*
+** Use two 32-bit integers to represent a 64-bit quantity.
+*/
+typedef struct Rand64 {
+  lu_int32 h;  /* higher half */
+  lu_int32 l;  /* lower half */
+} Rand64;
+
+
+/*
+** If 'lu_int32' has more than 32 bits, the extra bits do not interfere
+** with the 32 initial bits, except in a right shift and comparisons.
+** Moreover, the final result has to discard the extra bits.
+*/
+
+/* avoid using extra bits when needed */
+#define trim32(x)	((x) & 0xffffffffu)
+
+
+/*
+** basic operations on 'Rand64' values
+*/
+
+/* build a new Rand64 value */
+static Rand64 packI (lu_int32 h, lu_int32 l) {
+  Rand64 result;
+  result.h = h;
+  result.l = l;
+  return result;
+}
+
+/* return i << n */
+static Rand64 Ishl (Rand64 i, int n) {
+  lua_assert(n > 0 && n < 32);
+  return packI((i.h << n) | (trim32(i.l) >> (32 - n)), i.l << n);
+}
+
+/* i1 ^= i2 */
+static void Ixor (Rand64 *i1, Rand64 i2) {
+  i1->h ^= i2.h;
+  i1->l ^= i2.l;
+}
+
+/* return i1 + i2 */
+static Rand64 Iadd (Rand64 i1, Rand64 i2) {
+  Rand64 result = packI(i1.h + i2.h, i1.l + i2.l);
+  if (trim32(result.l) < trim32(i1.l))  /* carry? */
+    result.h++;
+  return result;
+}
+
+/* return i * 5 */
+static Rand64 times5 (Rand64 i) {
+  return Iadd(Ishl(i, 2), i);  /* i * 5 == (i << 2) + i */
+}
+
+/* return i * 9 */
+static Rand64 times9 (Rand64 i) {
+  return Iadd(Ishl(i, 3), i);  /* i * 9 == (i << 3) + i */
+}
+
+/* return 'i' rotated left 'n' bits */
+static Rand64 rotl (Rand64 i, int n) {
+  lua_assert(n > 0 && n < 32);
+  return packI((i.h << n) | (trim32(i.l) >> (32 - n)),
+               (trim32(i.h) >> (32 - n)) | (i.l << n));
+}
+
+/* for offsets larger than 32, rotate right by 64 - offset */
+static Rand64 rotl1 (Rand64 i, int n) {
+  lua_assert(n > 32 && n < 64);
+  n = 64 - n;
+  return packI((trim32(i.h) >> n) | (i.l << (32 - n)),
+               (i.h << (32 - n)) | (trim32(i.l) >> n));
+}
+
+/*
+** implementation of 'xoshiro256**' algorithm on 'Rand64' values
+*/
+static Rand64 nextrand (Rand64 *state) {
+  Rand64 res = times9(rotl(times5(state[1]), 7));
+  Rand64 t = Ishl(state[1], 17);
+  Ixor(&state[2], state[0]);
+  Ixor(&state[3], state[1]);
+  Ixor(&state[1], state[2]);
+  Ixor(&state[0], state[3]);
+  Ixor(&state[2], t);
+  state[3] = rotl1(state[3], 45);
+  return res;
+}
+
+
+/*
+** Converts a 'Rand64' into a float.
+*/
+
+/* an unsigned 1 with proper type */
+#define UONE		((lu_int32)1)
+
+
+#if FIGS <= 32
+
+/* 2^(-FIGS) */
+#define scaleFIG       (l_mathop(0.5) / (UONE << (FIGS - 1)))
+
+/*
+** get up to 32 bits from higher half, shifting right to
+** throw out the extra bits.
+*/
+static lua_Number I2d (Rand64 x) {
+  lua_Number h = (lua_Number)(trim32(x.h) >> (32 - FIGS));
+  return h * scaleFIG;
+}
+
+#else	/* 32 < FIGS <= 64 */
+
+/* 2^(-FIGS) = 1.0 / 2^30 / 2^3 / 2^(FIGS-33) */
+#define scaleFIG  \
+    (l_mathop(1.0) / (UONE << 30) / l_mathop(8.0) / (UONE << (FIGS - 33)))
+
+/*
+** use FIGS - 32 bits from lower half, throwing out the other
+** (32 - (FIGS - 32)) = (64 - FIGS) bits
+*/
+#define shiftLOW	(64 - FIGS)
+
+/*
+** higher 32 bits go after those (FIGS - 32) bits: shiftHI = 2^(FIGS - 32)
+*/
+#define shiftHI		((lua_Number)(UONE << (FIGS - 33)) * l_mathop(2.0))
+
+
+static lua_Number I2d (Rand64 x) {
+  lua_Number h = (lua_Number)trim32(x.h) * shiftHI;
+  lua_Number l = (lua_Number)(trim32(x.l) >> shiftLOW);
+  return (h + l) * scaleFIG;
+}
+
+#endif
+
+
+/* convert a 'Rand64' to a 'lua_Unsigned' */
+static lua_Unsigned I2UInt (Rand64 x) {
+  return (((lua_Unsigned)trim32(x.h) << 31) << 1) | (lua_Unsigned)trim32(x.l);
+}
+
+/* convert a 'lua_Unsigned' to a 'Rand64' */
+static Rand64 Int2I (lua_Unsigned n) {
+  return packI((lu_int32)((n >> 31) >> 1), (lu_int32)n);
+}
+
+#endif  /* } */
+
+
+/*
+** A state uses four 'Rand64' values.
+*/
+typedef struct {
+  Rand64 s[4];
+} RanState;
+
+
+/*
+** Project the random integer 'ran' into the interval [0, n].
+** Because 'ran' has 2^B possible values, the projection can only be
+** uniform when the size of the interval is a power of 2 (exact
+** division). Otherwise, to get a uniform projection into [0, n], we
+** first compute 'lim', the smallest Mersenne number not smaller than
+** 'n'. We then project 'ran' into the interval [0, lim].  If the result
+** is inside [0, n], we are done. Otherwise, we try with another 'ran',
+** until we have a result inside the interval.
+*/
+static lua_Unsigned project (lua_Unsigned ran, lua_Unsigned n,
+                             RanState *state) {
+  if ((n & (n + 1)) == 0)  /* is 'n + 1' a power of 2? */
+    return ran & n;  /* no bias */
+  else {
+    lua_Unsigned lim = n;
+    /* compute the smallest (2^b - 1) not smaller than 'n' */
+    lim |= (lim >> 1);
+    lim |= (lim >> 2);
+    lim |= (lim >> 4);
+    lim |= (lim >> 8);
+    lim |= (lim >> 16);
+#if (LUA_MAXUNSIGNED >> 31) >= 3
+    lim |= (lim >> 32);  /* integer type has more than 32 bits */
+#endif
+    lua_assert((lim & (lim + 1)) == 0  /* 'lim + 1' is a power of 2, */
+      && lim >= n  /* not smaller than 'n', */
+      && (lim >> 1) < n);  /* and it is the smallest one */
+    while ((ran &= lim) > n)  /* project 'ran' into [0..lim] */
+      ran = I2UInt(nextrand(state->s));  /* not inside [0..n]? try again */
+    return ran;
+  }
+}
+
+
+static int math_random (lua_State *L) {
+  lua_Integer low, up;
+  lua_Unsigned p;
+  RanState *state = (RanState *)lua_touserdata(L, lua_upvalueindex(1));
+  Rand64 rv = nextrand(state->s);  /* next pseudo-random value */
+  switch (lua_gettop(L)) {  /* check number of arguments */
+    case 0: {  /* no arguments */
+      lua_pushnumber(L, I2d(rv));  /* float between 0 and 1 */
+      return 1;
+    }
+    case 1: {  /* only upper limit */
+      low = 1;
+      up = luaL_checkinteger(L, 1);
+      if (up == 0) {  /* single 0 as argument? */
+        lua_pushinteger(L, I2UInt(rv));  /* full random integer */
+        return 1;
+      }
+      break;
+    }
+    case 2: {  /* lower and upper limits */
+      low = luaL_checkinteger(L, 1);
+      up = luaL_checkinteger(L, 2);
+      break;
+    }
+    default: return luaL_error(L, "wrong number of arguments");
+  }
+  /* random integer in the interval [low, up] */
+  luaL_argcheck(L, low <= up, 1, "interval is empty");
+  /* project random integer into the interval [0, up - low] */
+  p = project(I2UInt(rv), (lua_Unsigned)up - (lua_Unsigned)low, state);
+  lua_pushinteger(L, p + (lua_Unsigned)low);
+  return 1;
+}
+
+
+static void setseed (lua_State *L, Rand64 *state,
+                     lua_Unsigned n1, lua_Unsigned n2) {
+  int i;
+  state[0] = Int2I(n1);
+  state[1] = Int2I(0xff);  /* avoid a zero state */
+  state[2] = Int2I(n2);
+  state[3] = Int2I(0);
+  for (i = 0; i < 16; i++)
+    nextrand(state);  /* discard initial values to "spread" seed */
+  lua_pushinteger(L, n1);
+  lua_pushinteger(L, n2);
+}
+
+
+/*
+** Set a "random" seed. To get some randomness, use the current time
+** and the address of 'L' (in case the machine does address space layout
+** randomization).
+*/
+static void randseed (lua_State *L, RanState *state) {
+  lua_Unsigned seed1 = (lua_Unsigned)time(NULL);
+  lua_Unsigned seed2 = (lua_Unsigned)(size_t)L;
+  setseed(L, state->s, seed1, seed2);
+}
+
+
+static int math_randomseed (lua_State *L) {
+  RanState *state = (RanState *)lua_touserdata(L, lua_upvalueindex(1));
+  if (lua_isnone(L, 1)) {
+    randseed(L, state);
+  }
+  else {
+    lua_Integer n1 = luaL_checkinteger(L, 1);
+    lua_Integer n2 = luaL_optinteger(L, 2, 0);
+    setseed(L, state->s, n1, n2);
+  }
+  return 2;  /* return seeds */
+}
+
+
+static const luaL_Reg randfuncs[] = {
+  {"random", math_random},
+  {"randomseed", math_randomseed},
+  {NULL, NULL}
+};
+
+
+/*
+** Register the random functions and initialize their state.
+*/
+static void setrandfunc (lua_State *L) {
+  RanState *state = (RanState *)lua_newuserdatauv(L, sizeof(RanState), 0);
+  randseed(L, state);  /* initialize with a "random" seed */
+  lua_pop(L, 2);  /* remove pushed seeds */
+  luaL_setfuncs(L, randfuncs, 1);
+}
+
+/* }================================================================== */
+
+
+/*
+** {==================================================================
+** Deprecated functions (for compatibility only)
+** ===================================================================
+*/
+#if defined(LUA_COMPAT_MATHLIB)
+
+static int math_cosh (lua_State *L) {
+  lua_pushnumber(L, l_mathop(cosh)(luaL_checknumber(L, 1)));
+  return 1;
+}
+
+static int math_sinh (lua_State *L) {
+  lua_pushnumber(L, l_mathop(sinh)(luaL_checknumber(L, 1)));
+  return 1;
+}
+
+static int math_tanh (lua_State *L) {
+  lua_pushnumber(L, l_mathop(tanh)(luaL_checknumber(L, 1)));
+  return 1;
+}
+
+static int math_pow (lua_State *L) {
+  lua_Number x = luaL_checknumber(L, 1);
+  lua_Number y = luaL_checknumber(L, 2);
+  lua_pushnumber(L, l_mathop(pow)(x, y));
+  return 1;
+}
+
+static int math_frexp (lua_State *L) {
+  int e;
+  lua_pushnumber(L, l_mathop(frexp)(luaL_checknumber(L, 1), &e));
+  lua_pushinteger(L, e);
+  return 2;
+}
+
+static int math_ldexp (lua_State *L) {
+  lua_Number x = luaL_checknumber(L, 1);
+  int ep = (int)luaL_checkinteger(L, 2);
+  lua_pushnumber(L, l_mathop(ldexp)(x, ep));
+  return 1;
+}
+
+static int math_log10 (lua_State *L) {
+  lua_pushnumber(L, l_mathop(log10)(luaL_checknumber(L, 1)));
+  return 1;
+}
+
+#endif
+/* }================================================================== */
+
+
+
+static const luaL_Reg mathlib[] = {
+  {"abs",   math_abs},
+  {"acos",  math_acos},
+  {"asin",  math_asin},
+  {"atan",  math_atan},
+  {"ceil",  math_ceil},
+  {"cos",   math_cos},
+  {"deg",   math_deg},
+  {"exp",   math_exp},
+  {"tointeger", math_toint},
+  {"floor", math_floor},
+  {"fmod",   math_fmod},
+  {"ult",   math_ult},
+  {"log",   math_log},
+  {"max",   math_max},
+  {"min",   math_min},
+  {"modf",   math_modf},
+  {"rad",   math_rad},
+  {"sin",   math_sin},
+  {"sqrt",  math_sqrt},
+  {"tan",   math_tan},
+  {"type", math_type},
+#if defined(LUA_COMPAT_MATHLIB)
+  {"atan2", math_atan},
+  {"cosh",   math_cosh},
+  {"sinh",   math_sinh},
+  {"tanh",   math_tanh},
+  {"pow",   math_pow},
+  {"frexp", math_frexp},
+  {"ldexp", math_ldexp},
+  {"log10", math_log10},
+#endif
+  /* placeholders */
+  {"random", NULL},
+  {"randomseed", NULL},
+  {"pi", NULL},
+  {"huge", NULL},
+  {"maxinteger", NULL},
+  {"mininteger", NULL},
+  {NULL, NULL}
+};
+
+
+/*
+** Open math library
+*/
+LUAMOD_API int luaopen_math (lua_State *L) {
+  luaL_newlib(L, mathlib);
+  lua_pushnumber(L, PI);
+  lua_setfield(L, -2, "pi");
+  lua_pushnumber(L, (lua_Number)HUGE_VAL);
+  lua_setfield(L, -2, "huge");
+  lua_pushinteger(L, LUA_MAXINTEGER);
+  lua_setfield(L, -2, "maxinteger");
+  lua_pushinteger(L, LUA_MININTEGER);
+  lua_setfield(L, -2, "mininteger");
+  setrandfunc(L);
+  return 1;
+}
+
@@ -0,0 +1,215 @@
+/*
+** $Id: lmem.c $
+** Interface to Memory Manager
+** See Copyright Notice in lua.h
+*/
+
+#define lmem_c
+#define LUA_CORE
+
+#include "lprefix.h"
+
+
+#include <stddef.h>
+
+#include "lua.h"
+
+#include "ldebug.h"
+#include "ldo.h"
+#include "lgc.h"
+#include "lmem.h"
+#include "lobject.h"
+#include "lstate.h"
+
+
+
+/*
+** About the realloc function:
+** void *frealloc (void *ud, void *ptr, size_t osize, size_t nsize);
+** ('osize' is the old size, 'nsize' is the new size)
+**
+** - frealloc(ud, p, x, 0) frees the block 'p' and returns NULL.
+** Particularly, frealloc(ud, NULL, 0, 0) does nothing,
+** which is equivalent to free(NULL) in ISO C.
+**
+** - frealloc(ud, NULL, x, s) creates a new block of size 's'
+** (no matter 'x'). Returns NULL if it cannot create the new block.
+**
+** - otherwise, frealloc(ud, b, x, y) reallocates the block 'b' from
+** size 'x' to size 'y'. Returns NULL if it cannot reallocate the
+** block to the new size.
+*/
+
+
+/*
+** Macro to call the allocation function.
+*/
+#define callfrealloc(g,block,os,ns)    ((*g->frealloc)(g->ud, block, os, ns))
+
+
+/*
+** When an allocation fails, it will try again after an emergency
+** collection, except when it cannot run a collection.  The GC should
+** not be called while the state is not fully built, as the collector
+** is not yet fully initialized. Also, it should not be called when
+** 'gcstopem' is true, because then the interpreter is in the middle of
+** a collection step.
+*/
+#define cantryagain(g)	(completestate(g) && !g->gcstopem)
+
+
+
+
+#if defined(EMERGENCYGCTESTS)
+/*
+** First allocation will fail except when freeing a block (frees never
+** fail) and when it cannot try again; this fail will trigger 'tryagain'
+** and a full GC cycle at every allocation.
+*/
+static void *firsttry (global_State *g, void *block, size_t os, size_t ns) {
+  if (ns > 0 && cantryagain(g))
+    return NULL;  /* fail */
+  else  /* normal allocation */
+    return callfrealloc(g, block, os, ns);
+}
+#else
+#define firsttry(g,block,os,ns)    callfrealloc(g, block, os, ns)
+#endif
+
+
+
+
+
+/*
+** {==================================================================
+** Functions to allocate/deallocate arrays for the Parser
+** ===================================================================
+*/
+
+/*
+** Minimum size for arrays during parsing, to avoid overhead of
+** reallocating to size 1, then 2, and then 4. All these arrays
+** will be reallocated to exact sizes or erased when parsing ends.
+*/
+#define MINSIZEARRAY	4
+
+
+void *luaM_growaux_ (lua_State *L, void *block, int nelems, int *psize,
+                     int size_elems, int limit, const char *what) {
+  void *newblock;
+  int size = *psize;
+  if (nelems + 1 <= size)  /* does one extra element still fit? */
+    return block;  /* nothing to be done */
+  if (size >= limit / 2) {  /* cannot double it? */
+    if (l_unlikely(size >= limit))  /* cannot grow even a little? */
+      luaG_runerror(L, "too many %s (limit is %d)", what, limit);
+    size = limit;  /* still have at least one free place */
+  }
+  else {
+    size *= 2;
+    if (size < MINSIZEARRAY)
+      size = MINSIZEARRAY;  /* minimum size */
+  }
+  lua_assert(nelems + 1 <= size && size <= limit);
+  /* 'limit' ensures that multiplication will not overflow */
+  newblock = luaM_saferealloc_(L, block, cast_sizet(*psize) * size_elems,
+                                         cast_sizet(size) * size_elems);
+  *psize = size;  /* update only when everything else is OK */
+  return newblock;
+}
+
+
+/*
+** In prototypes, the size of the array is also its number of
+** elements (to save memory). So, if it cannot shrink an array
+** to its number of elements, the only option is to raise an
+** error.
+*/
+void *luaM_shrinkvector_ (lua_State *L, void *block, int *size,
+                          int final_n, int size_elem) {
+  void *newblock;
+  size_t oldsize = cast_sizet((*size) * size_elem);
+  size_t newsize = cast_sizet(final_n * size_elem);
+  lua_assert(newsize <= oldsize);
+  newblock = luaM_saferealloc_(L, block, oldsize, newsize);
+  *size = final_n;
+  return newblock;
+}
+
+/* }================================================================== */
+
+
+l_noret luaM_toobig (lua_State *L) {
+  luaG_runerror(L, "memory allocation error: block too big");
+}
+
+
+/*
+** Free memory
+*/
+void luaM_free_ (lua_State *L, void *block, size_t osize) {
+  global_State *g = G(L);
+  lua_assert((osize == 0) == (block == NULL));
+  callfrealloc(g, block, osize, 0);
+  g->GCdebt -= osize;
+}
+
+
+/*
+** In case of allocation fail, this function will do an emergency
+** collection to free some memory and then try the allocation again.
+*/
+static void *tryagain (lua_State *L, void *block,
+                       size_t osize, size_t nsize) {
+  global_State *g = G(L);
+  if (cantryagain(g)) {
+    luaC_fullgc(L, 1);  /* try to free some memory... */
+    return callfrealloc(g, block, osize, nsize);  /* try again */
+  }
+  else return NULL;  /* cannot run an emergency collection */
+}
+
+
+/*
+** Generic allocation routine.
+*/
+void *luaM_realloc_ (lua_State *L, void *block, size_t osize, size_t nsize) {
+  void *newblock;
+  global_State *g = G(L);
+  lua_assert((osize == 0) == (block == NULL));
+  newblock = firsttry(g, block, osize, nsize);
+  if (l_unlikely(newblock == NULL && nsize > 0)) {
+    newblock = tryagain(L, block, osize, nsize);
+    if (newblock == NULL)  /* still no memory? */
+      return NULL;  /* do not update 'GCdebt' */
+  }
+  lua_assert((nsize == 0) == (newblock == NULL));
+  g->GCdebt = (g->GCdebt + nsize) - osize;
+  return newblock;
+}
+
+
+void *luaM_saferealloc_ (lua_State *L, void *block, size_t osize,
+                                                    size_t nsize) {
+  void *newblock = luaM_realloc_(L, block, osize, nsize);
+  if (l_unlikely(newblock == NULL && nsize > 0))  /* allocation failed? */
+    luaM_error(L);
+  return newblock;
+}
+
+
+void *luaM_malloc_ (lua_State *L, size_t size, int tag) {
+  if (size == 0)
+    return NULL;  /* that's all */
+  else {
+    global_State *g = G(L);
+    void *newblock = firsttry(g, NULL, tag, size);
+    if (l_unlikely(newblock == NULL)) {
+      newblock = tryagain(L, NULL, tag, size);
+      if (newblock == NULL)
+        luaM_error(L);
+    }
+    g->GCdebt += size;
+    return newblock;
+  }
+}
@@ -0,0 +1,93 @@
+/*
+** $Id: lmem.h $
+** Interface to Memory Manager
+** See Copyright Notice in lua.h
+*/
+
+#ifndef lmem_h
+#define lmem_h
+
+
+#include <stddef.h>
+
+#include "llimits.h"
+#include "lua.h"
+
+
+#define luaM_error(L)	luaD_throw(L, LUA_ERRMEM)
+
+
+/*
+** This macro tests whether it is safe to multiply 'n' by the size of
+** type 't' without overflows. Because 'e' is always constant, it avoids
+** the runtime division MAX_SIZET/(e).
+** (The macro is somewhat complex to avoid warnings:  The 'sizeof'
+** comparison avoids a runtime comparison when overflow cannot occur.
+** The compiler should be able to optimize the real test by itself, but
+** when it does it, it may give a warning about "comparison is always
+** false due to limited range of data type"; the +1 tricks the compiler,
+** avoiding this warning but also this optimization.)
+*/
+#define luaM_testsize(n,e)  \
+	(sizeof(n) >= sizeof(size_t) && cast_sizet((n)) + 1 > MAX_SIZET/(e))
+
+#define luaM_checksize(L,n,e)  \
+	(luaM_testsize(n,e) ? luaM_toobig(L) : cast_void(0))
+
+
+/*
+** Computes the minimum between 'n' and 'MAX_SIZET/sizeof(t)', so that
+** the result is not larger than 'n' and cannot overflow a 'size_t'
+** when multiplied by the size of type 't'. (Assumes that 'n' is an
+** 'int' or 'unsigned int' and that 'int' is not larger than 'size_t'.)
+*/
+#define luaM_limitN(n,t)  \
+  ((cast_sizet(n) <= MAX_SIZET/sizeof(t)) ? (n) :  \
+     cast_uint((MAX_SIZET/sizeof(t))))
+
+
+/*
+** Arrays of chars do not need any test
+*/
+#define luaM_reallocvchar(L,b,on,n)  \
+  cast_charp(luaM_saferealloc_(L, (b), (on)*sizeof(char), (n)*sizeof(char)))
+
+#define luaM_freemem(L, b, s)	luaM_free_(L, (b), (s))
+#define luaM_free(L, b)		luaM_free_(L, (b), sizeof(*(b)))
+#define luaM_freearray(L, b, n)   luaM_free_(L, (b), (n)*sizeof(*(b)))
+
+#define luaM_new(L,t)		cast(t*, luaM_malloc_(L, sizeof(t), 0))
+#define luaM_newvector(L,n,t)	cast(t*, luaM_malloc_(L, (n)*sizeof(t), 0))
+#define luaM_newvectorchecked(L,n,t) \
+  (luaM_checksize(L,n,sizeof(t)), luaM_newvector(L,n,t))
+
+#define luaM_newobject(L,tag,s)	luaM_malloc_(L, (s), tag)
+
+#define luaM_growvector(L,v,nelems,size,t,limit,e) \
+	((v)=cast(t *, luaM_growaux_(L,v,nelems,&(size),sizeof(t), \
+                         luaM_limitN(limit,t),e)))
+
+#define luaM_reallocvector(L, v,oldn,n,t) \
+   (cast(t *, luaM_realloc_(L, v, cast_sizet(oldn) * sizeof(t), \
+                                  cast_sizet(n) * sizeof(t))))
+
+#define luaM_shrinkvector(L,v,size,fs,t) \
+   ((v)=cast(t *, luaM_shrinkvector_(L, v, &(size), fs, sizeof(t))))
+
+LUAI_FUNC l_noret luaM_toobig (lua_State *L);
+
+/* not to be called directly */
+LUAI_FUNC void *luaM_realloc_ (lua_State *L, void *block, size_t oldsize,
+                                                          size_t size);
+LUAI_FUNC void *luaM_saferealloc_ (lua_State *L, void *block, size_t oldsize,
+                                                              size_t size);
+LUAI_FUNC void luaM_free_ (lua_State *L, void *block, size_t osize);
+LUAI_FUNC void *luaM_growaux_ (lua_State *L, void *block, int nelems,
+                               int *size, int size_elem, int limit,
+                               const char *what);
+LUAI_FUNC void *luaM_shrinkvector_ (lua_State *L, void *block, int *nelem,
+                                    int final_n, int size_elem);
+LUAI_FUNC void *luaM_malloc_ (lua_State *L, size_t size, int tag);
+
+#endif
+
@@ -0,0 +1,758 @@
+/*
+** $Id: loadlib.c $
+** Dynamic library loader for Lua
+** See Copyright Notice in lua.h
+**
+** This module contains an implementation of loadlib for Unix systems
+** that have dlfcn, an implementation for Windows, and a stub for other
+** systems.
+*/
+
+#define loadlib_c
+#define LUA_LIB
+
+#include "lprefix.h"
+
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+#include "lua.h"
+
+#include "lauxlib.h"
+#include "lualib.h"
+
+
+/*
+** LUA_CSUBSEP is the character that replaces dots in submodule names
+** when searching for a C loader.
+** LUA_LSUBSEP is the character that replaces dots in submodule names
+** when searching for a Lua loader.
+*/
+#if !defined(LUA_CSUBSEP)
+#define LUA_CSUBSEP		LUA_DIRSEP
+#endif
+
+#if !defined(LUA_LSUBSEP)
+#define LUA_LSUBSEP		LUA_DIRSEP
+#endif
+
+
+/* prefix for open functions in C libraries */
+#define LUA_POF		"luaopen_"
+
+/* separator for open functions in C libraries */
+#define LUA_OFSEP	"_"
+
+
+/*
+** key for table in the registry that keeps handles
+** for all loaded C libraries
+*/
+static const char *const CLIBS = "_CLIBS";
+
+#define LIB_FAIL	"open"
+
+
+#define setprogdir(L)           ((void)0)
+
+
+/*
+** Special type equivalent to '(void*)' for functions in gcc
+** (to suppress warnings when converting function pointers)
+*/
+typedef void (*voidf)(void);
+
+
+/*
+** system-dependent functions
+*/
+
+/*
+** unload library 'lib'
+*/
+static void lsys_unloadlib (void *lib);
+
+/*
+** load C library in file 'path'. If 'seeglb', load with all names in
+** the library global.
+** Returns the library; in case of error, returns NULL plus an
+** error string in the stack.
+*/
+static void *lsys_load (lua_State *L, const char *path, int seeglb);
+
+/*
+** Try to find a function named 'sym' in library 'lib'.
+** Returns the function; in case of error, returns NULL plus an
+** error string in the stack.
+*/
+static lua_CFunction lsys_sym (lua_State *L, void *lib, const char *sym);
+
+
+
+
+#if defined(LUA_USE_DLOPEN)	/* { */
+/*
+** {========================================================================
+** This is an implementation of loadlib based on the dlfcn interface.
+** The dlfcn interface is available in Linux, SunOS, Solaris, IRIX, FreeBSD,
+** NetBSD, AIX 4.2, HPUX 11, and  probably most other Unix flavors, at least
+** as an emulation layer on top of native functions.
+** =========================================================================
+*/
+
+#include <dlfcn.h>
+
+/*
+** Macro to convert pointer-to-void* to pointer-to-function. This cast
+** is undefined according to ISO C, but POSIX assumes that it works.
+** (The '__extension__' in gnu compilers is only to avoid warnings.)
+*/
+#if defined(__GNUC__)
+#define cast_func(p) (__extension__ (lua_CFunction)(p))
+#else
+#define cast_func(p) ((lua_CFunction)(p))
+#endif
+
+
+static void lsys_unloadlib (void *lib) {
+  dlclose(lib);
+}
+
+
+static void *lsys_load (lua_State *L, const char *path, int seeglb) {
+  void *lib = dlopen(path, RTLD_NOW | (seeglb ? RTLD_GLOBAL : RTLD_LOCAL));
+  if (l_unlikely(lib == NULL))
+    lua_pushstring(L, dlerror());
+  return lib;
+}
+
+
+static lua_CFunction lsys_sym (lua_State *L, void *lib, const char *sym) {
+  lua_CFunction f = cast_func(dlsym(lib, sym));
+  if (l_unlikely(f == NULL))
+    lua_pushstring(L, dlerror());
+  return f;
+}
+
+/* }====================================================== */
+
+
+
+#elif defined(LUA_DL_DLL)	/* }{ */
+/*
+** {======================================================================
+** This is an implementation of loadlib for Windows using native functions.
+** =======================================================================
+*/
+
+#include <windows.h>
+
+
+/*
+** optional flags for LoadLibraryEx
+*/
+#if !defined(LUA_LLE_FLAGS)
+#define LUA_LLE_FLAGS	0
+#endif
+
+
+#undef setprogdir
+
+
+/*
+** Replace in the path (on the top of the stack) any occurrence
+** of LUA_EXEC_DIR with the executable's path.
+*/
+static void setprogdir (lua_State *L) {
+  char buff[MAX_PATH + 1];
+  char *lb;
+  DWORD nsize = sizeof(buff)/sizeof(char);
+  DWORD n = GetModuleFileNameA(NULL, buff, nsize);  /* get exec. name */
+  if (n == 0 || n == nsize || (lb = strrchr(buff, '\\')) == NULL)
+    luaL_error(L, "unable to get ModuleFileName");
+  else {
+    *lb = '\0';  /* cut name on the last '\\' to get the path */
+    luaL_gsub(L, lua_tostring(L, -1), LUA_EXEC_DIR, buff);
+    lua_remove(L, -2);  /* remove original string */
+  }
+}
+
+
+
+
+static void pusherror (lua_State *L) {
+  int error = GetLastError();
+  char buffer[128];
+  if (FormatMessageA(FORMAT_MESSAGE_IGNORE_INSERTS | FORMAT_MESSAGE_FROM_SYSTEM,
+      NULL, error, 0, buffer, sizeof(buffer)/sizeof(char), NULL))
+    lua_pushstring(L, buffer);
+  else
+    lua_pushfstring(L, "system error %d\n", error);
+}
+
+static void lsys_unloadlib (void *lib) {
+  FreeLibrary((HMODULE)lib);
+}
+
+
+static void *lsys_load (lua_State *L, const char *path, int seeglb) {
+  HMODULE lib = LoadLibraryExA(path, NULL, LUA_LLE_FLAGS);
+  (void)(seeglb);  /* not used: symbols are 'global' by default */
+  if (lib == NULL) pusherror(L);
+  return lib;
+}
+
+
+static lua_CFunction lsys_sym (lua_State *L, void *lib, const char *sym) {
+  lua_CFunction f = (lua_CFunction)(voidf)GetProcAddress((HMODULE)lib, sym);
+  if (f == NULL) pusherror(L);
+  return f;
+}
+
+/* }====================================================== */
+
+
+#else				/* }{ */
+/*
+** {======================================================
+** Fallback for other systems
+** =======================================================
+*/
+
+#undef LIB_FAIL
+#define LIB_FAIL	"absent"
+
+
+#define DLMSG	"dynamic libraries not enabled; check your Lua installation"
+
+
+static void lsys_unloadlib (void *lib) {
+  (void)(lib);  /* not used */
+}
+
+
+static void *lsys_load (lua_State *L, const char *path, int seeglb) {
+  (void)(path); (void)(seeglb);  /* not used */
+  lua_pushliteral(L, DLMSG);
+  return NULL;
+}
+
+
+static lua_CFunction lsys_sym (lua_State *L, void *lib, const char *sym) {
+  (void)(lib); (void)(sym);  /* not used */
+  lua_pushliteral(L, DLMSG);
+  return NULL;
+}
+
+/* }====================================================== */
+#endif				/* } */
+
+
+/*
+** {==================================================================
+** Set Paths
+** ===================================================================
+*/
+
+/*
+** LUA_PATH_VAR and LUA_CPATH_VAR are the names of the environment
+** variables that Lua check to set its paths.
+*/
+#if !defined(LUA_PATH_VAR)
+#define LUA_PATH_VAR    "LUA_PATH"
+#endif
+
+#if !defined(LUA_CPATH_VAR)
+#define LUA_CPATH_VAR   "LUA_CPATH"
+#endif
+
+
+
+/*
+** return registry.LUA_NOENV as a boolean
+*/
+static int noenv (lua_State *L) {
+  int b;
+  lua_getfield(L, LUA_REGISTRYINDEX, "LUA_NOENV");
+  b = lua_toboolean(L, -1);
+  lua_pop(L, 1);  /* remove value */
+  return b;
+}
+
+
+/*
+** Set a path
+*/
+static void setpath (lua_State *L, const char *fieldname,
+                                   const char *envname,
+                                   const char *dft) {
+  const char *dftmark;
+  const char *nver = lua_pushfstring(L, "%s%s", envname, LUA_VERSUFFIX);
+  const char *path = getenv(nver);  /* try versioned name */
+  if (path == NULL)  /* no versioned environment variable? */
+    path = getenv(envname);  /* try unversioned name */
+  if (path == NULL || noenv(L))  /* no environment variable? */
+    lua_pushstring(L, dft);  /* use default */
+  else if ((dftmark = strstr(path, LUA_PATH_SEP LUA_PATH_SEP)) == NULL)
+    lua_pushstring(L, path);  /* nothing to change */
+  else {  /* path contains a ";;": insert default path in its place */
+    size_t len = strlen(path);
+    luaL_Buffer b;
+    luaL_buffinit(L, &b);
+    if (path < dftmark) {  /* is there a prefix before ';;'? */
+      luaL_addlstring(&b, path, dftmark - path);  /* add it */
+      luaL_addchar(&b, *LUA_PATH_SEP);
+    }
+    luaL_addstring(&b, dft);  /* add default */
+    if (dftmark < path + len - 2) {  /* is there a suffix after ';;'? */
+      luaL_addchar(&b, *LUA_PATH_SEP);
+      luaL_addlstring(&b, dftmark + 2, (path + len - 2) - dftmark);
+    }
+    luaL_pushresult(&b);
+  }
+  setprogdir(L);
+  lua_setfield(L, -3, fieldname);  /* package[fieldname] = path value */
+  lua_pop(L, 1);  /* pop versioned variable name ('nver') */
+}
+
+/* }================================================================== */
+
+
+/*
+** return registry.CLIBS[path]
+*/
+static void *checkclib (lua_State *L, const char *path) {
+  void *plib;
+  lua_getfield(L, LUA_REGISTRYINDEX, CLIBS);
+  lua_getfield(L, -1, path);
+  plib = lua_touserdata(L, -1);  /* plib = CLIBS[path] */
+  lua_pop(L, 2);  /* pop CLIBS table and 'plib' */
+  return plib;
+}
+
+
+/*
+** registry.CLIBS[path] = plib        -- for queries
+** registry.CLIBS[#CLIBS + 1] = plib  -- also keep a list of all libraries
+*/
+static void addtoclib (lua_State *L, const char *path, void *plib) {
+  lua_getfield(L, LUA_REGISTRYINDEX, CLIBS);
+  lua_pushlightuserdata(L, plib);
+  lua_pushvalue(L, -1);
+  lua_setfield(L, -3, path);  /* CLIBS[path] = plib */
+  lua_rawseti(L, -2, luaL_len(L, -2) + 1);  /* CLIBS[#CLIBS + 1] = plib */
+  lua_pop(L, 1);  /* pop CLIBS table */
+}
+
+
+/*
+** __gc tag method for CLIBS table: calls 'lsys_unloadlib' for all lib
+** handles in list CLIBS
+*/
+static int gctm (lua_State *L) {
+  lua_Integer n = luaL_len(L, 1);
+  for (; n >= 1; n--) {  /* for each handle, in reverse order */
+    lua_rawgeti(L, 1, n);  /* get handle CLIBS[n] */
+    lsys_unloadlib(lua_touserdata(L, -1));
+    lua_pop(L, 1);  /* pop handle */
+  }
+  return 0;
+}
+
+
+
+/* error codes for 'lookforfunc' */
+#define ERRLIB		1
+#define ERRFUNC		2
+
+/*
+** Look for a C function named 'sym' in a dynamically loaded library
+** 'path'.
+** First, check whether the library is already loaded; if not, try
+** to load it.
+** Then, if 'sym' is '*', return true (as library has been loaded).
+** Otherwise, look for symbol 'sym' in the library and push a
+** C function with that symbol.
+** Return 0 and 'true' or a function in the stack; in case of
+** errors, return an error code and an error message in the stack.
+*/
+static int lookforfunc (lua_State *L, const char *path, const char *sym) {
+  void *reg = checkclib(L, path);  /* check loaded C libraries */
+  if (reg == NULL) {  /* must load library? */
+    reg = lsys_load(L, path, *sym == '*');  /* global symbols if 'sym'=='*' */
+    if (reg == NULL) return ERRLIB;  /* unable to load library */
+    addtoclib(L, path, reg);
+  }
+  if (*sym == '*') {  /* loading only library (no function)? */
+    lua_pushboolean(L, 1);  /* return 'true' */
+    return 0;  /* no errors */
+  }
+  else {
+    lua_CFunction f = lsys_sym(L, reg, sym);
+    if (f == NULL)
+      return ERRFUNC;  /* unable to find function */
+    lua_pushcfunction(L, f);  /* else create new function */
+    return 0;  /* no errors */
+  }
+}
+
+
+static int ll_loadlib (lua_State *L) {
+  const char *path = luaL_checkstring(L, 1);
+  const char *init = luaL_checkstring(L, 2);
+  int stat = lookforfunc(L, path, init);
+  if (l_likely(stat == 0))  /* no errors? */
+    return 1;  /* return the loaded function */
+  else {  /* error; error message is on stack top */
+    luaL_pushfail(L);
+    lua_insert(L, -2);
+    lua_pushstring(L, (stat == ERRLIB) ?  LIB_FAIL : "init");
+    return 3;  /* return fail, error message, and where */
+  }
+}
+
+
+
+/*
+** {======================================================
+** 'require' function
+** =======================================================
+*/
+
+
+static int readable (const char *filename) {
+  FILE *f = fopen(filename, "r");  /* try to open file */
+  if (f == NULL) return 0;  /* open failed */
+  fclose(f);
+  return 1;
+}
+
+
+/*
+** Get the next name in '*path' = 'name1;name2;name3;...', changing
+** the ending ';' to '\0' to create a zero-terminated string. Return
+** NULL when list ends.
+*/
+static const char *getnextfilename (char **path, char *end) {
+  char *sep;
+  char *name = *path;
+  if (name == end)
+    return NULL;  /* no more names */
+  else if (*name == '\0') {  /* from previous iteration? */
+    *name = *LUA_PATH_SEP;  /* restore separator */
+    name++;  /* skip it */
+  }
+  sep = strchr(name, *LUA_PATH_SEP);  /* find next separator */
+  if (sep == NULL)  /* separator not found? */
+    sep = end;  /* name goes until the end */
+  *sep = '\0';  /* finish file name */
+  *path = sep;  /* will start next search from here */
+  return name;
+}
+
+
+/*
+** Given a path such as ";blabla.so;blublu.so", pushes the string
+**
+** no file 'blabla.so'
+**	no file 'blublu.so'
+*/
+static void pusherrornotfound (lua_State *L, const char *path) {
+  luaL_Buffer b;
+  luaL_buffinit(L, &b);
+  luaL_addstring(&b, "no file '");
+  luaL_addgsub(&b, path, LUA_PATH_SEP, "'\n\tno file '");
+  luaL_addstring(&b, "'");
+  luaL_pushresult(&b);
+}
+
+
+static const char *searchpath (lua_State *L, const char *name,
+                                             const char *path,
+                                             const char *sep,
+                                             const char *dirsep) {
+  luaL_Buffer buff;
+  char *pathname;  /* path with name inserted */
+  char *endpathname;  /* its end */
+  const char *filename;
+  /* separator is non-empty and appears in 'name'? */
+  if (*sep != '\0' && strchr(name, *sep) != NULL)
+    name = luaL_gsub(L, name, sep, dirsep);  /* replace it by 'dirsep' */
+  luaL_buffinit(L, &buff);
+  /* add path to the buffer, replacing marks ('?') with the file name */
+  luaL_addgsub(&buff, path, LUA_PATH_MARK, name);
+  luaL_addchar(&buff, '\0');
+  pathname = luaL_buffaddr(&buff);  /* writable list of file names */
+  endpathname = pathname + luaL_bufflen(&buff) - 1;
+  while ((filename = getnextfilename(&pathname, endpathname)) != NULL) {
+    if (readable(filename))  /* does file exist and is readable? */
+      return lua_pushstring(L, filename);  /* save and return name */
+  }
+  luaL_pushresult(&buff);  /* push path to create error message */
+  pusherrornotfound(L, lua_tostring(L, -1));  /* create error message */
+  return NULL;  /* not found */
+}
+
+
+static int ll_searchpath (lua_State *L) {
+  const char *f = searchpath(L, luaL_checkstring(L, 1),
+                                luaL_checkstring(L, 2),
+                                luaL_optstring(L, 3, "."),
+                                luaL_optstring(L, 4, LUA_DIRSEP));
+  if (f != NULL) return 1;
+  else {  /* error message is on top of the stack */
+    luaL_pushfail(L);
+    lua_insert(L, -2);
+    return 2;  /* return fail + error message */
+  }
+}
+
+
+static const char *findfile (lua_State *L, const char *name,
+                                           const char *pname,
+                                           const char *dirsep) {
+  const char *path;
+  lua_getfield(L, lua_upvalueindex(1), pname);
+  path = lua_tostring(L, -1);
+  if (l_unlikely(path == NULL))
+    luaL_error(L, "'package.%s' must be a string", pname);
+  return searchpath(L, name, path, ".", dirsep);
+}
+
+
+static int checkload (lua_State *L, int stat, const char *filename) {
+  if (l_likely(stat)) {  /* module loaded successfully? */
+    lua_pushstring(L, filename);  /* will be 2nd argument to module */
+    return 2;  /* return open function and file name */
+  }
+  else
+    return luaL_error(L, "error loading module '%s' from file '%s':\n\t%s",
+                          lua_tostring(L, 1), filename, lua_tostring(L, -1));
+}
+
+
+static int searcher_Lua (lua_State *L) {
+  const char *filename;
+  const char *name = luaL_checkstring(L, 1);
+  filename = findfile(L, name, "path", LUA_LSUBSEP);
+  if (filename == NULL) return 1;  /* module not found in this path */
+  return checkload(L, (luaL_loadfile(L, filename) == LUA_OK), filename);
+}
+
+
+/*
+** Try to find a load function for module 'modname' at file 'filename'.
+** First, change '.' to '_' in 'modname'; then, if 'modname' has
+** the form X-Y (that is, it has an "ignore mark"), build a function
+** name "luaopen_X" and look for it. (For compatibility, if that
+** fails, it also tries "luaopen_Y".) If there is no ignore mark,
+** look for a function named "luaopen_modname".
+*/
+static int loadfunc (lua_State *L, const char *filename, const char *modname) {
+  const char *openfunc;
+  const char *mark;
+  modname = luaL_gsub(L, modname, ".", LUA_OFSEP);
+  mark = strchr(modname, *LUA_IGMARK);
+  if (mark) {
+    int stat;
+    openfunc = lua_pushlstring(L, modname, mark - modname);
+    openfunc = lua_pushfstring(L, LUA_POF"%s", openfunc);
+    stat = lookforfunc(L, filename, openfunc);
+    if (stat != ERRFUNC) return stat;
+    modname = mark + 1;  /* else go ahead and try old-style name */
+  }
+  openfunc = lua_pushfstring(L, LUA_POF"%s", modname);
+  return lookforfunc(L, filename, openfunc);
+}
+
+
+static int searcher_C (lua_State *L) {
+  const char *name = luaL_checkstring(L, 1);
+  const char *filename = findfile(L, name, "cpath", LUA_CSUBSEP);
+  if (filename == NULL) return 1;  /* module not found in this path */
+  return checkload(L, (loadfunc(L, filename, name) == 0), filename);
+}
+
+
+static int searcher_Croot (lua_State *L) {
+  const char *filename;
+  const char *name = luaL_checkstring(L, 1);
+  const char *p = strchr(name, '.');
+  int stat;
+  if (p == NULL) return 0;  /* is root */
+  lua_pushlstring(L, name, p - name);
+  filename = findfile(L, lua_tostring(L, -1), "cpath", LUA_CSUBSEP);
+  if (filename == NULL) return 1;  /* root not found */
+  if ((stat = loadfunc(L, filename, name)) != 0) {
+    if (stat != ERRFUNC)
+      return checkload(L, 0, filename);  /* real error */
+    else {  /* open function not found */
+      lua_pushfstring(L, "no module '%s' in file '%s'", name, filename);
+      return 1;
+    }
+  }
+  lua_pushstring(L, filename);  /* will be 2nd argument to module */
+  return 2;
+}
+
+
+static int searcher_preload (lua_State *L) {
+  const char *name = luaL_checkstring(L, 1);
+  lua_getfield(L, LUA_REGISTRYINDEX, LUA_PRELOAD_TABLE);
+  if (lua_getfield(L, -1, name) == LUA_TNIL) {  /* not found? */
+    lua_pushfstring(L, "no field package.preload['%s']", name);
+    return 1;
+  }
+  else {
+    lua_pushliteral(L, ":preload:");
+    return 2;
+  }
+}
+
+
+static void findloader (lua_State *L, const char *name) {
+  int i;
+  luaL_Buffer msg;  /* to build error message */
+  /* push 'package.searchers' to index 3 in the stack */
+  if (l_unlikely(lua_getfield(L, lua_upvalueindex(1), "searchers")
+                 != LUA_TTABLE))
+    luaL_error(L, "'package.searchers' must be a table");
+  luaL_buffinit(L, &msg);
+  /*  iterate over available searchers to find a loader */
+  for (i = 1; ; i++) {
+    luaL_addstring(&msg, "\n\t");  /* error-message prefix */
+    if (l_unlikely(lua_rawgeti(L, 3, i) == LUA_TNIL)) {  /* no more searchers? */
+      lua_pop(L, 1);  /* remove nil */
+      luaL_buffsub(&msg, 2);  /* remove prefix */
+      luaL_pushresult(&msg);  /* create error message */
+      luaL_error(L, "module '%s' not found:%s", name, lua_tostring(L, -1));
+    }
+    lua_pushstring(L, name);
+    lua_call(L, 1, 2);  /* call it */
+    if (lua_isfunction(L, -2))  /* did it find a loader? */
+      return;  /* module loader found */
+    else if (lua_isstring(L, -2)) {  /* searcher returned error message? */
+      lua_pop(L, 1);  /* remove extra return */
+      luaL_addvalue(&msg);  /* concatenate error message */
+    }
+    else {  /* no error message */
+      lua_pop(L, 2);  /* remove both returns */
+      luaL_buffsub(&msg, 2);  /* remove prefix */
+    }
+  }
+}
+
+
+static int ll_require (lua_State *L) {
+  const char *name = luaL_checkstring(L, 1);
+  lua_settop(L, 1);  /* LOADED table will be at index 2 */
+  lua_getfield(L, LUA_REGISTRYINDEX, LUA_LOADED_TABLE);
+  lua_getfield(L, 2, name);  /* LOADED[name] */
+  if (lua_toboolean(L, -1))  /* is it there? */
+    return 1;  /* package is already loaded */
+  /* else must load package */
+  lua_pop(L, 1);  /* remove 'getfield' result */
+  findloader(L, name);
+  lua_rotate(L, -2, 1);  /* function <-> loader data */
+  lua_pushvalue(L, 1);  /* name is 1st argument to module loader */
+  lua_pushvalue(L, -3);  /* loader data is 2nd argument */
+  /* stack: ...; loader data; loader function; mod. name; loader data */
+  lua_call(L, 2, 1);  /* run loader to load module */
+  /* stack: ...; loader data; result from loader */
+  if (!lua_isnil(L, -1))  /* non-nil return? */
+    lua_setfield(L, 2, name);  /* LOADED[name] = returned value */
+  else
+    lua_pop(L, 1);  /* pop nil */
+  if (lua_getfield(L, 2, name) == LUA_TNIL) {   /* module set no value? */
+    lua_pushboolean(L, 1);  /* use true as result */
+    lua_copy(L, -1, -2);  /* replace loader result */
+    lua_setfield(L, 2, name);  /* LOADED[name] = true */
+  }
+  lua_rotate(L, -2, 1);  /* loader data <-> module result  */
+  return 2;  /* return module result and loader data */
+}
+
+/* }====================================================== */
+
+
+
+
+static const luaL_Reg pk_funcs[] = {
+  {"loadlib", ll_loadlib},
+  {"searchpath", ll_searchpath},
+  /* placeholders */
+  {"preload", NULL},
+  {"cpath", NULL},
+  {"path", NULL},
+  {"searchers", NULL},
+  {"loaded", NULL},
+  {NULL, NULL}
+};
+
+
+static const luaL_Reg ll_funcs[] = {
+  {"require", ll_require},
+  {NULL, NULL}
+};
+
+
+static void createsearcherstable (lua_State *L) {
+  static const lua_CFunction searchers[] = {
+    searcher_preload,
+    searcher_Lua,
+    searcher_C,
+    searcher_Croot,
+    NULL
+  };
+  int i;
+  /* create 'searchers' table */
+  lua_createtable(L, sizeof(searchers)/sizeof(searchers[0]) - 1, 0);
+  /* fill it with predefined searchers */
+  for (i=0; searchers[i] != NULL; i++) {
+    lua_pushvalue(L, -2);  /* set 'package' as upvalue for all searchers */
+    lua_pushcclosure(L, searchers[i], 1);
+    lua_rawseti(L, -2, i+1);
+  }
+  lua_setfield(L, -2, "searchers");  /* put it in field 'searchers' */
+}
+
+
+/*
+** create table CLIBS to keep track of loaded C libraries,
+** setting a finalizer to close all libraries when closing state.
+*/
+static void createclibstable (lua_State *L) {
+  luaL_getsubtable(L, LUA_REGISTRYINDEX, CLIBS);  /* create CLIBS table */
+  lua_createtable(L, 0, 1);  /* create metatable for CLIBS */
+  lua_pushcfunction(L, gctm);
+  lua_setfield(L, -2, "__gc");  /* set finalizer for CLIBS table */
+  lua_setmetatable(L, -2);
+}
+
+
+LUAMOD_API int luaopen_package (lua_State *L) {
+  createclibstable(L);
+  luaL_newlib(L, pk_funcs);  /* create 'package' table */
+  createsearcherstable(L);
+  /* set paths */
+  setpath(L, "path", LUA_PATH_VAR, LUA_PATH_DEFAULT);
+  setpath(L, "cpath", LUA_CPATH_VAR, LUA_CPATH_DEFAULT);
+  /* store config information */
+  lua_pushliteral(L, LUA_DIRSEP "\n" LUA_PATH_SEP "\n" LUA_PATH_MARK "\n"
+                     LUA_EXEC_DIR "\n" LUA_IGMARK "\n");
+  lua_setfield(L, -2, "config");
+  /* set field 'loaded' */
+  luaL_getsubtable(L, LUA_REGISTRYINDEX, LUA_LOADED_TABLE);
+  lua_setfield(L, -2, "loaded");
+  /* set field 'preload' */
+  luaL_getsubtable(L, LUA_REGISTRYINDEX, LUA_PRELOAD_TABLE);
+  lua_setfield(L, -2, "preload");
+  lua_pushglobaltable(L);
+  lua_pushvalue(L, -2);  /* set 'package' as upvalue for next lib */
+  luaL_setfuncs(L, ll_funcs, 1);  /* open lib into global table */
+  lua_pop(L, 1);  /* pop global table */
+  return 1;  /* return 'package' table */
+}
+
@@ -0,0 +1,602 @@
+/*
+** $Id: lobject.c $
+** Some generic functions over Lua objects
+** See Copyright Notice in lua.h
+*/
+
+#define lobject_c
+#define LUA_CORE
+
+#include "lprefix.h"
+
+
+#include <locale.h>
+#include <math.h>
+#include <stdarg.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+#include "lua.h"
+
+#include "lctype.h"
+#include "ldebug.h"
+#include "ldo.h"
+#include "lmem.h"
+#include "lobject.h"
+#include "lstate.h"
+#include "lstring.h"
+#include "lvm.h"
+
+
+/*
+** Computes ceil(log2(x))
+*/
+int luaO_ceillog2 (unsigned int x) {
+  static const lu_byte log_2[256] = {  /* log_2[i] = ceil(log2(i - 1)) */
+    0,1,2,2,3,3,3,3,4,4,4,4,4,4,4,4,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,
+    6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,
+    7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,
+    7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,
+    8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,
+    8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,
+    8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,
+    8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8
+  };
+  int l = 0;
+  x--;
+  while (x >= 256) { l += 8; x >>= 8; }
+  return l + log_2[x];
+}
+
+
+static lua_Integer intarith (lua_State *L, int op, lua_Integer v1,
+                                                   lua_Integer v2) {
+  switch (op) {
+    case LUA_OPADD: return intop(+, v1, v2);
+    case LUA_OPSUB:return intop(-, v1, v2);
+    case LUA_OPMUL:return intop(*, v1, v2);
+    case LUA_OPMOD: return luaV_mod(L, v1, v2);
+    case LUA_OPIDIV: return luaV_idiv(L, v1, v2);
+    case LUA_OPBAND: return intop(&, v1, v2);
+    case LUA_OPBOR: return intop(|, v1, v2);
+    case LUA_OPBXOR: return intop(^, v1, v2);
+    case LUA_OPSHL: return luaV_shiftl(v1, v2);
+    case LUA_OPSHR: return luaV_shiftr(v1, v2);
+    case LUA_OPUNM: return intop(-, 0, v1);
+    case LUA_OPBNOT: return intop(^, ~l_castS2U(0), v1);
+    default: lua_assert(0); return 0;
+  }
+}
+
+
+static lua_Number numarith (lua_State *L, int op, lua_Number v1,
+                                                  lua_Number v2) {
+  switch (op) {
+    case LUA_OPADD: return luai_numadd(L, v1, v2);
+    case LUA_OPSUB: return luai_numsub(L, v1, v2);
+    case LUA_OPMUL: return luai_nummul(L, v1, v2);
+    case LUA_OPDIV: return luai_numdiv(L, v1, v2);
+    case LUA_OPPOW: return luai_numpow(L, v1, v2);
+    case LUA_OPIDIV: return luai_numidiv(L, v1, v2);
+    case LUA_OPUNM: return luai_numunm(L, v1);
+    case LUA_OPMOD: return luaV_modf(L, v1, v2);
+    default: lua_assert(0); return 0;
+  }
+}
+
+
+int luaO_rawarith (lua_State *L, int op, const TValue *p1, const TValue *p2,
+                   TValue *res) {
+  switch (op) {
+    case LUA_OPBAND: case LUA_OPBOR: case LUA_OPBXOR:
+    case LUA_OPSHL: case LUA_OPSHR:
+    case LUA_OPBNOT: {  /* operate only on integers */
+      lua_Integer i1; lua_Integer i2;
+      if (tointegerns(p1, &i1) && tointegerns(p2, &i2)) {
+        setivalue(res, intarith(L, op, i1, i2));
+        return 1;
+      }
+      else return 0;  /* fail */
+    }
+    case LUA_OPDIV: case LUA_OPPOW: {  /* operate only on floats */
+      lua_Number n1; lua_Number n2;
+      if (tonumberns(p1, n1) && tonumberns(p2, n2)) {
+        setfltvalue(res, numarith(L, op, n1, n2));
+        return 1;
+      }
+      else return 0;  /* fail */
+    }
+    default: {  /* other operations */
+      lua_Number n1; lua_Number n2;
+      if (ttisinteger(p1) && ttisinteger(p2)) {
+        setivalue(res, intarith(L, op, ivalue(p1), ivalue(p2)));
+        return 1;
+      }
+      else if (tonumberns(p1, n1) && tonumberns(p2, n2)) {
+        setfltvalue(res, numarith(L, op, n1, n2));
+        return 1;
+      }
+      else return 0;  /* fail */
+    }
+  }
+}
+
+
+void luaO_arith (lua_State *L, int op, const TValue *p1, const TValue *p2,
+                 StkId res) {
+  if (!luaO_rawarith(L, op, p1, p2, s2v(res))) {
+    /* could not perform raw operation; try metamethod */
+    luaT_trybinTM(L, p1, p2, res, cast(TMS, (op - LUA_OPADD) + TM_ADD));
+  }
+}
+
+
+int luaO_hexavalue (int c) {
+  if (lisdigit(c)) return c - '0';
+  else return (ltolower(c) - 'a') + 10;
+}
+
+
+static int isneg (const char **s) {
+  if (**s == '-') { (*s)++; return 1; }
+  else if (**s == '+') (*s)++;
+  return 0;
+}
+
+
+
+/*
+** {==================================================================
+** Lua's implementation for 'lua_strx2number'
+** ===================================================================
+*/
+
+#if !defined(lua_strx2number)
+
+/* maximum number of significant digits to read (to avoid overflows
+   even with single floats) */
+#define MAXSIGDIG	30
+
+/*
+** convert a hexadecimal numeric string to a number, following
+** C99 specification for 'strtod'
+*/
+static lua_Number lua_strx2number (const char *s, char **endptr) {
+  int dot = lua_getlocaledecpoint();
+  lua_Number r = l_mathop(0.0);  /* result (accumulator) */
+  int sigdig = 0;  /* number of significant digits */
+  int nosigdig = 0;  /* number of non-significant digits */
+  int e = 0;  /* exponent correction */
+  int neg;  /* 1 if number is negative */
+  int hasdot = 0;  /* true after seen a dot */
+  *endptr = cast_charp(s);  /* nothing is valid yet */
+  while (lisspace(cast_uchar(*s))) s++;  /* skip initial spaces */
+  neg = isneg(&s);  /* check sign */
+  if (!(*s == '0' && (*(s + 1) == 'x' || *(s + 1) == 'X')))  /* check '0x' */
+    return l_mathop(0.0);  /* invalid format (no '0x') */
+  for (s += 2; ; s++) {  /* skip '0x' and read numeral */
+    if (*s == dot) {
+      if (hasdot) break;  /* second dot? stop loop */
+      else hasdot = 1;
+    }
+    else if (lisxdigit(cast_uchar(*s))) {
+      if (sigdig == 0 && *s == '0')  /* non-significant digit (zero)? */
+        nosigdig++;
+      else if (++sigdig <= MAXSIGDIG)  /* can read it without overflow? */
+          r = (r * l_mathop(16.0)) + luaO_hexavalue(*s);
+      else e++; /* too many digits; ignore, but still count for exponent */
+      if (hasdot) e--;  /* decimal digit? correct exponent */
+    }
+    else break;  /* neither a dot nor a digit */
+  }
+  if (nosigdig + sigdig == 0)  /* no digits? */
+    return l_mathop(0.0);  /* invalid format */
+  *endptr = cast_charp(s);  /* valid up to here */
+  e *= 4;  /* each digit multiplies/divides value by 2^4 */
+  if (*s == 'p' || *s == 'P') {  /* exponent part? */
+    int exp1 = 0;  /* exponent value */
+    int neg1;  /* exponent sign */
+    s++;  /* skip 'p' */
+    neg1 = isneg(&s);  /* sign */
+    if (!lisdigit(cast_uchar(*s)))
+      return l_mathop(0.0);  /* invalid; must have at least one digit */
+    while (lisdigit(cast_uchar(*s)))  /* read exponent */
+      exp1 = exp1 * 10 + *(s++) - '0';
+    if (neg1) exp1 = -exp1;
+    e += exp1;
+    *endptr = cast_charp(s);  /* valid up to here */
+  }
+  if (neg) r = -r;
+  return l_mathop(ldexp)(r, e);
+}
+
+#endif
+/* }====================================================== */
+
+
+/* maximum length of a numeral to be converted to a number */
+#if !defined (L_MAXLENNUM)
+#define L_MAXLENNUM	200
+#endif
+
+/*
+** Convert string 's' to a Lua number (put in 'result'). Return NULL on
+** fail or the address of the ending '\0' on success. ('mode' == 'x')
+** means a hexadecimal numeral.
+*/
+static const char *l_str2dloc (const char *s, lua_Number *result, int mode) {
+  char *endptr;
+  *result = (mode == 'x') ? lua_strx2number(s, &endptr)  /* try to convert */
+                          : lua_str2number(s, &endptr);
+  if (endptr == s) return NULL;  /* nothing recognized? */
+  while (lisspace(cast_uchar(*endptr))) endptr++;  /* skip trailing spaces */
+  return (*endptr == '\0') ? endptr : NULL;  /* OK iff no trailing chars */
+}
+
+
+/*
+** Convert string 's' to a Lua number (put in 'result') handling the
+** current locale.
+** This function accepts both the current locale or a dot as the radix
+** mark. If the conversion fails, it may mean number has a dot but
+** locale accepts something else. In that case, the code copies 's'
+** to a buffer (because 's' is read-only), changes the dot to the
+** current locale radix mark, and tries to convert again.
+** The variable 'mode' checks for special characters in the string:
+** - 'n' means 'inf' or 'nan' (which should be rejected)
+** - 'x' means a hexadecimal numeral
+** - '.' just optimizes the search for the common case (no special chars)
+*/
+static const char *l_str2d (const char *s, lua_Number *result) {
+  const char *endptr;
+  const char *pmode = strpbrk(s, ".xXnN");  /* look for special chars */
+  int mode = pmode ? ltolower(cast_uchar(*pmode)) : 0;
+  if (mode == 'n')  /* reject 'inf' and 'nan' */
+    return NULL;
+  endptr = l_str2dloc(s, result, mode);  /* try to convert */
+  if (endptr == NULL) {  /* failed? may be a different locale */
+    char buff[L_MAXLENNUM + 1];
+    const char *pdot = strchr(s, '.');
+    if (pdot == NULL || strlen(s) > L_MAXLENNUM)
+      return NULL;  /* string too long or no dot; fail */
+    strcpy(buff, s);  /* copy string to buffer */
+    buff[pdot - s] = lua_getlocaledecpoint();  /* correct decimal point */
+    endptr = l_str2dloc(buff, result, mode);  /* try again */
+    if (endptr != NULL)
+      endptr = s + (endptr - buff);  /* make relative to 's' */
+  }
+  return endptr;
+}
+
+
+#define MAXBY10		cast(lua_Unsigned, LUA_MAXINTEGER / 10)
+#define MAXLASTD	cast_int(LUA_MAXINTEGER % 10)
+
+static const char *l_str2int (const char *s, lua_Integer *result) {
+  lua_Unsigned a = 0;
+  int empty = 1;
+  int neg;
+  while (lisspace(cast_uchar(*s))) s++;  /* skip initial spaces */
+  neg = isneg(&s);
+  if (s[0] == '0' &&
+      (s[1] == 'x' || s[1] == 'X')) {  /* hex? */
+    s += 2;  /* skip '0x' */
+    for (; lisxdigit(cast_uchar(*s)); s++) {
+      a = a * 16 + luaO_hexavalue(*s);
+      empty = 0;
+    }
+  }
+  else {  /* decimal */
+    for (; lisdigit(cast_uchar(*s)); s++) {
+      int d = *s - '0';
+      if (a >= MAXBY10 && (a > MAXBY10 || d > MAXLASTD + neg))  /* overflow? */
+        return NULL;  /* do not accept it (as integer) */
+      a = a * 10 + d;
+      empty = 0;
+    }
+  }
+  while (lisspace(cast_uchar(*s))) s++;  /* skip trailing spaces */
+  if (empty || *s != '\0') return NULL;  /* something wrong in the numeral */
+  else {
+    *result = l_castU2S((neg) ? 0u - a : a);
+    return s;
+  }
+}
+
+
+size_t luaO_str2num (const char *s, TValue *o) {
+  lua_Integer i; lua_Number n;
+  const char *e;
+  if ((e = l_str2int(s, &i)) != NULL) {  /* try as an integer */
+    setivalue(o, i);
+  }
+  else if ((e = l_str2d(s, &n)) != NULL) {  /* else try as a float */
+    setfltvalue(o, n);
+  }
+  else
+    return 0;  /* conversion failed */
+  return (e - s) + 1;  /* success; return string size */
+}
+
+
+int luaO_utf8esc (char *buff, unsigned long x) {
+  int n = 1;  /* number of bytes put in buffer (backwards) */
+  lua_assert(x <= 0x7FFFFFFFu);
+  if (x < 0x80)  /* ascii? */
+    buff[UTF8BUFFSZ - 1] = cast_char(x);
+  else {  /* need continuation bytes */
+    unsigned int mfb = 0x3f;  /* maximum that fits in first byte */
+    do {  /* add continuation bytes */
+      buff[UTF8BUFFSZ - (n++)] = cast_char(0x80 | (x & 0x3f));
+      x >>= 6;  /* remove added bits */
+      mfb >>= 1;  /* now there is one less bit available in first byte */
+    } while (x > mfb);  /* still needs continuation byte? */
+    buff[UTF8BUFFSZ - n] = cast_char((~mfb << 1) | x);  /* add first byte */
+  }
+  return n;
+}
+
+
+/*
+** Maximum length of the conversion of a number to a string. Must be
+** enough to accommodate both LUA_INTEGER_FMT and LUA_NUMBER_FMT.
+** (For a long long int, this is 19 digits plus a sign and a final '\0',
+** adding to 21. For a long double, it can go to a sign, 33 digits,
+** the dot, an exponent letter, an exponent sign, 5 exponent digits,
+** and a final '\0', adding to 43.)
+*/
+#define MAXNUMBER2STR	44
+
+
+/*
+** Convert a number object to a string, adding it to a buffer
+*/
+static int tostringbuff (TValue *obj, char *buff) {
+  int len;
+  lua_assert(ttisnumber(obj));
+  if (ttisinteger(obj))
+    len = lua_integer2str(buff, MAXNUMBER2STR, ivalue(obj));
+  else {
+    len = lua_number2str(buff, MAXNUMBER2STR, fltvalue(obj));
+    if (buff[strspn(buff, "-0123456789")] == '\0') {  /* looks like an int? */
+      buff[len++] = lua_getlocaledecpoint();
+      buff[len++] = '0';  /* adds '.0' to result */
+    }
+  }
+  return len;
+}
+
+
+/*
+** Convert a number object to a Lua string, replacing the value at 'obj'
+*/
+void luaO_tostring (lua_State *L, TValue *obj) {
+  char buff[MAXNUMBER2STR];
+  int len = tostringbuff(obj, buff);
+  setsvalue(L, obj, luaS_newlstr(L, buff, len));
+}
+
+
+
+
+/*
+** {==================================================================
+** 'luaO_pushvfstring'
+** ===================================================================
+*/
+
+/*
+** Size for buffer space used by 'luaO_pushvfstring'. It should be
+** (LUA_IDSIZE + MAXNUMBER2STR) + a minimal space for basic messages,
+** so that 'luaG_addinfo' can work directly on the buffer.
+*/
+#define BUFVFS		(LUA_IDSIZE + MAXNUMBER2STR + 95)
+
+/* buffer used by 'luaO_pushvfstring' */
+typedef struct BuffFS {
+  lua_State *L;
+  int pushed;  /* true if there is a part of the result on the stack */
+  int blen;  /* length of partial string in 'space' */
+  char space[BUFVFS];  /* holds last part of the result */
+} BuffFS;
+
+
+/*
+** Push given string to the stack, as part of the result, and
+** join it to previous partial result if there is one.
+** It may call 'luaV_concat' while using one slot from EXTRA_STACK.
+** This call cannot invoke metamethods, as both operands must be
+** strings. It can, however, raise an error if the result is too
+** long. In that case, 'luaV_concat' frees the extra slot before
+** raising the error.
+*/
+static void pushstr (BuffFS *buff, const char *str, size_t lstr) {
+  lua_State *L = buff->L;
+  setsvalue2s(L, L->top.p, luaS_newlstr(L, str, lstr));
+  L->top.p++;  /* may use one slot from EXTRA_STACK */
+  if (!buff->pushed)  /* no previous string on the stack? */
+    buff->pushed = 1;  /* now there is one */
+  else  /* join previous string with new one */
+    luaV_concat(L, 2);
+}
+
+
+/*
+** empty the buffer space into the stack
+*/
+static void clearbuff (BuffFS *buff) {
+  pushstr(buff, buff->space, buff->blen);  /* push buffer contents */
+  buff->blen = 0;  /* space now is empty */
+}
+
+
+/*
+** Get a space of size 'sz' in the buffer. If buffer has not enough
+** space, empty it. 'sz' must fit in an empty buffer.
+*/
+static char *getbuff (BuffFS *buff, int sz) {
+  lua_assert(buff->blen <= BUFVFS); lua_assert(sz <= BUFVFS);
+  if (sz > BUFVFS - buff->blen)  /* not enough space? */
+    clearbuff(buff);
+  return buff->space + buff->blen;
+}
+
+
+#define addsize(b,sz)	((b)->blen += (sz))
+
+
+/*
+** Add 'str' to the buffer. If string is larger than the buffer space,
+** push the string directly to the stack.
+*/
+static void addstr2buff (BuffFS *buff, const char *str, size_t slen) {
+  if (slen <= BUFVFS) {  /* does string fit into buffer? */
+    char *bf = getbuff(buff, cast_int(slen));
+    memcpy(bf, str, slen);  /* add string to buffer */
+    addsize(buff, cast_int(slen));
+  }
+  else {  /* string larger than buffer */
+    clearbuff(buff);  /* string comes after buffer's content */
+    pushstr(buff, str, slen);  /* push string */
+  }
+}
+
+
+/*
+** Add a numeral to the buffer.
+*/
+static void addnum2buff (BuffFS *buff, TValue *num) {
+  char *numbuff = getbuff(buff, MAXNUMBER2STR);
+  int len = tostringbuff(num, numbuff);  /* format number into 'numbuff' */
+  addsize(buff, len);
+}
+
+
+/*
+** this function handles only '%d', '%c', '%f', '%p', '%s', and '%%'
+   conventional formats, plus Lua-specific '%I' and '%U'
+*/
+const char *luaO_pushvfstring (lua_State *L, const char *fmt, va_list argp) {
+  BuffFS buff;  /* holds last part of the result */
+  const char *e;  /* points to next '%' */
+  buff.pushed = buff.blen = 0;
+  buff.L = L;
+  while ((e = strchr(fmt, '%')) != NULL) {
+    addstr2buff(&buff, fmt, e - fmt);  /* add 'fmt' up to '%' */
+    switch (*(e + 1)) {  /* conversion specifier */
+      case 's': {  /* zero-terminated string */
+        const char *s = va_arg(argp, char *);
+        if (s == NULL) s = "(null)";
+        addstr2buff(&buff, s, strlen(s));
+        break;
+      }
+      case 'c': {  /* an 'int' as a character */
+        char c = cast_uchar(va_arg(argp, int));
+        addstr2buff(&buff, &c, sizeof(char));
+        break;
+      }
+      case 'd': {  /* an 'int' */
+        TValue num;
+        setivalue(&num, va_arg(argp, int));
+        addnum2buff(&buff, &num);
+        break;
+      }
+      case 'I': {  /* a 'lua_Integer' */
+        TValue num;
+        setivalue(&num, cast(lua_Integer, va_arg(argp, l_uacInt)));
+        addnum2buff(&buff, &num);
+        break;
+      }
+      case 'f': {  /* a 'lua_Number' */
+        TValue num;
+        setfltvalue(&num, cast_num(va_arg(argp, l_uacNumber)));
+        addnum2buff(&buff, &num);
+        break;
+      }
+      case 'p': {  /* a pointer */
+        const int sz = 3 * sizeof(void*) + 8; /* enough space for '%p' */
+        char *bf = getbuff(&buff, sz);
+        void *p = va_arg(argp, void *);
+        int len = lua_pointer2str(bf, sz, p);
+        addsize(&buff, len);
+        break;
+      }
+      case 'U': {  /* a 'long' as a UTF-8 sequence */
+        char bf[UTF8BUFFSZ];
+        int len = luaO_utf8esc(bf, va_arg(argp, long));
+        addstr2buff(&buff, bf + UTF8BUFFSZ - len, len);
+        break;
+      }
+      case '%': {
+        addstr2buff(&buff, "%", 1);
+        break;
+      }
+      default: {
+        luaG_runerror(L, "invalid option '%%%c' to 'lua_pushfstring'",
+                         *(e + 1));
+      }
+    }
+    fmt = e + 2;  /* skip '%' and the specifier */
+  }
+  addstr2buff(&buff, fmt, strlen(fmt));  /* rest of 'fmt' */
+  clearbuff(&buff);  /* empty buffer into the stack */
+  lua_assert(buff.pushed == 1);
+  return getstr(tsvalue(s2v(L->top.p - 1)));
+}
+
+
+const char *luaO_pushfstring (lua_State *L, const char *fmt, ...) {
+  const char *msg;
+  va_list argp;
+  va_start(argp, fmt);
+  msg = luaO_pushvfstring(L, fmt, argp);
+  va_end(argp);
+  return msg;
+}
+
+/* }================================================================== */
+
+
+#define RETS	"..."
+#define PRE	"[string \""
+#define POS	"\"]"
+
+#define addstr(a,b,l)	( memcpy(a,b,(l) * sizeof(char)), a += (l) )
+
+void luaO_chunkid (char *out, const char *source, size_t srclen) {
+  size_t bufflen = LUA_IDSIZE;  /* free space in buffer */
+  if (*source == '=') {  /* 'literal' source */
+    if (srclen <= bufflen)  /* small enough? */
+      memcpy(out, source + 1, srclen * sizeof(char));
+    else {  /* truncate it */
+      addstr(out, source + 1, bufflen - 1);
+      *out = '\0';
+    }
+  }
+  else if (*source == '@') {  /* file name */
+    if (srclen <= bufflen)  /* small enough? */
+      memcpy(out, source + 1, srclen * sizeof(char));
+    else {  /* add '...' before rest of name */
+      addstr(out, RETS, LL(RETS));
+      bufflen -= LL(RETS);
+      memcpy(out, source + 1 + srclen - bufflen, bufflen * sizeof(char));
+    }
+  }
+  else {  /* string; format as [string "source"] */
+    const char *nl = strchr(source, '\n');  /* find first new line (if any) */
+    addstr(out, PRE, LL(PRE));  /* add prefix */
+    bufflen -= LL(PRE RETS POS) + 1;  /* save space for prefix+suffix+'\0' */
+    if (srclen < bufflen && nl == NULL) {  /* small one-line source? */
+      addstr(out, source, srclen);  /* keep it */
+    }
+    else {
+      if (nl != NULL) srclen = nl - source;  /* stop at first newline */
+      if (srclen > bufflen) srclen = bufflen;
+      addstr(out, source, srclen);
+      addstr(out, RETS, LL(RETS));
+    }
+    memcpy(out, POS, (LL(POS) + 1) * sizeof(char));
+  }
+}
+
@@ -0,0 +1,813 @@
+/*
+** $Id: lobject.h $
+** Type definitions for Lua objects
+** See Copyright Notice in lua.h
+*/
+
+
+#ifndef lobject_h
+#define lobject_h
+
+
+#include <stdarg.h>
+
+
+#include "llimits.h"
+#include "lua.h"
+
+
+/*
+** Extra types for collectable non-values
+*/
+#define LUA_TUPVAL	LUA_NUMTYPES  /* upvalues */
+#define LUA_TPROTO	(LUA_NUMTYPES+1)  /* function prototypes */
+#define LUA_TDEADKEY	(LUA_NUMTYPES+2)  /* removed keys in tables */
+
+
+
+/*
+** number of all possible types (including LUA_TNONE but excluding DEADKEY)
+*/
+#define LUA_TOTALTYPES		(LUA_TPROTO + 2)
+
+
+/*
+** tags for Tagged Values have the following use of bits:
+** bits 0-3: actual tag (a LUA_T* constant)
+** bits 4-5: variant bits
+** bit 6: whether value is collectable
+*/
+
+/* add variant bits to a type */
+#define makevariant(t,v)	((t) | ((v) << 4))
+
+
+
+/*
+** Union of all Lua values
+*/
+typedef union Value {
+  struct GCObject *gc;    /* collectable objects */
+  void *p;         /* light userdata */
+  lua_CFunction f; /* light C functions */
+  lua_Integer i;   /* integer numbers */
+  lua_Number n;    /* float numbers */
+  /* not used, but may avoid warnings for uninitialized value */
+  lu_byte ub;
+} Value;
+
+
+/*
+** Tagged Values. This is the basic representation of values in Lua:
+** an actual value plus a tag with its type.
+*/
+
+#define TValuefields	Value value_; lu_byte tt_
+
+typedef struct TValue {
+  TValuefields;
+} TValue;
+
+
+#define val_(o)		((o)->value_)
+#define valraw(o)	(val_(o))
+
+
+/* raw type tag of a TValue */
+#define rawtt(o)	((o)->tt_)
+
+/* tag with no variants (bits 0-3) */
+#define novariant(t)	((t) & 0x0F)
+
+/* type tag of a TValue (bits 0-3 for tags + variant bits 4-5) */
+#define withvariant(t)	((t) & 0x3F)
+#define ttypetag(o)	withvariant(rawtt(o))
+
+/* type of a TValue */
+#define ttype(o)	(novariant(rawtt(o)))
+
+
+/* Macros to test type */
+#define checktag(o,t)		(rawtt(o) == (t))
+#define checktype(o,t)		(ttype(o) == (t))
+
+
+/* Macros for internal tests */
+
+/* collectable object has the same tag as the original value */
+#define righttt(obj)		(ttypetag(obj) == gcvalue(obj)->tt)
+
+/*
+** Any value being manipulated by the program either is non
+** collectable, or the collectable object has the right tag
+** and it is not dead. The option 'L == NULL' allows other
+** macros using this one to be used where L is not available.
+*/
+#define checkliveness(L,obj) \
+	((void)L, lua_longassert(!iscollectable(obj) || \
+		(righttt(obj) && (L == NULL || !isdead(G(L),gcvalue(obj))))))
+
+
+/* Macros to set values */
+
+/* set a value's tag */
+#define settt_(o,t)	((o)->tt_=(t))
+
+
+/* main macro to copy values (from 'obj2' to 'obj1') */
+#define setobj(L,obj1,obj2) \
+	{ TValue *io1=(obj1); const TValue *io2=(obj2); \
+          io1->value_ = io2->value_; settt_(io1, io2->tt_); \
+	  checkliveness(L,io1); lua_assert(!isnonstrictnil(io1)); }
+
+/*
+** Different types of assignments, according to source and destination.
+** (They are mostly equal now, but may be different in the future.)
+*/
+
+/* from stack to stack */
+#define setobjs2s(L,o1,o2)	setobj(L,s2v(o1),s2v(o2))
+/* to stack (not from same stack) */
+#define setobj2s(L,o1,o2)	setobj(L,s2v(o1),o2)
+/* from table to same table */
+#define setobjt2t	setobj
+/* to new object */
+#define setobj2n	setobj
+/* to table */
+#define setobj2t	setobj
+
+
+/*
+** Entries in a Lua stack. Field 'tbclist' forms a list of all
+** to-be-closed variables active in this stack. Dummy entries are
+** used when the distance between two tbc variables does not fit
+** in an unsigned short. They are represented by delta==0, and
+** their real delta is always the maximum value that fits in
+** that field.
+*/
+typedef union StackValue {
+  TValue val;
+  struct {
+    TValuefields;
+    unsigned short delta;
+  } tbclist;
+} StackValue;
+
+
+/* index to stack elements */
+typedef StackValue *StkId;
+
+
+/*
+** When reallocating the stack, change all pointers to the stack into
+** proper offsets.
+*/
+typedef union {
+  StkId p;  /* actual pointer */
+  ptrdiff_t offset;  /* used while the stack is being reallocated */
+} StkIdRel;
+
+
+/* convert a 'StackValue' to a 'TValue' */
+#define s2v(o)	(&(o)->val)
+
+
+
+/*
+** {==================================================================
+** Nil
+** ===================================================================
+*/
+
+/* Standard nil */
+#define LUA_VNIL	makevariant(LUA_TNIL, 0)
+
+/* Empty slot (which might be different from a slot containing nil) */
+#define LUA_VEMPTY	makevariant(LUA_TNIL, 1)
+
+/* Value returned for a key not found in a table (absent key) */
+#define LUA_VABSTKEY	makevariant(LUA_TNIL, 2)
+
+
+/* macro to test for (any kind of) nil */
+#define ttisnil(v)		checktype((v), LUA_TNIL)
+
+
+/* macro to test for a standard nil */
+#define ttisstrictnil(o)	checktag((o), LUA_VNIL)
+
+
+#define setnilvalue(obj) settt_(obj, LUA_VNIL)
+
+
+#define isabstkey(v)		checktag((v), LUA_VABSTKEY)
+
+
+/*
+** macro to detect non-standard nils (used only in assertions)
+*/
+#define isnonstrictnil(v)	(ttisnil(v) && !ttisstrictnil(v))
+
+
+/*
+** By default, entries with any kind of nil are considered empty.
+** (In any definition, values associated with absent keys must also
+** be accepted as empty.)
+*/
+#define isempty(v)		ttisnil(v)
+
+
+/* macro defining a value corresponding to an absent key */
+#define ABSTKEYCONSTANT		{NULL}, LUA_VABSTKEY
+
+
+/* mark an entry as empty */
+#define setempty(v)		settt_(v, LUA_VEMPTY)
+
+
+
+/* }================================================================== */
+
+
+/*
+** {==================================================================
+** Booleans
+** ===================================================================
+*/
+
+
+#define LUA_VFALSE	makevariant(LUA_TBOOLEAN, 0)
+#define LUA_VTRUE	makevariant(LUA_TBOOLEAN, 1)
+
+#define ttisboolean(o)		checktype((o), LUA_TBOOLEAN)
+#define ttisfalse(o)		checktag((o), LUA_VFALSE)
+#define ttistrue(o)		checktag((o), LUA_VTRUE)
+
+
+#define l_isfalse(o)	(ttisfalse(o) || ttisnil(o))
+
+
+#define setbfvalue(obj)		settt_(obj, LUA_VFALSE)
+#define setbtvalue(obj)		settt_(obj, LUA_VTRUE)
+
+/* }================================================================== */
+
+
+/*
+** {==================================================================
+** Threads
+** ===================================================================
+*/
+
+#define LUA_VTHREAD		makevariant(LUA_TTHREAD, 0)
+
+#define ttisthread(o)		checktag((o), ctb(LUA_VTHREAD))
+
+#define thvalue(o)	check_exp(ttisthread(o), gco2th(val_(o).gc))
+
+#define setthvalue(L,obj,x) \
+  { TValue *io = (obj); lua_State *x_ = (x); \
+    val_(io).gc = obj2gco(x_); settt_(io, ctb(LUA_VTHREAD)); \
+    checkliveness(L,io); }
+
+#define setthvalue2s(L,o,t)	setthvalue(L,s2v(o),t)
+
+/* }================================================================== */
+
+
+/*
+** {==================================================================
+** Collectable Objects
+** ===================================================================
+*/
+
+/*
+** Common Header for all collectable objects (in macro form, to be
+** included in other objects)
+*/
+#define CommonHeader	struct GCObject *next; lu_byte tt; lu_byte marked
+
+
+/* Common type for all collectable objects */
+typedef struct GCObject {
+  CommonHeader;
+} GCObject;
+
+
+/* Bit mark for collectable types */
+#define BIT_ISCOLLECTABLE	(1 << 6)
+
+#define iscollectable(o)	(rawtt(o) & BIT_ISCOLLECTABLE)
+
+/* mark a tag as collectable */
+#define ctb(t)			((t) | BIT_ISCOLLECTABLE)
+
+#define gcvalue(o)	check_exp(iscollectable(o), val_(o).gc)
+
+#define gcvalueraw(v)	((v).gc)
+
+#define setgcovalue(L,obj,x) \
+  { TValue *io = (obj); GCObject *i_g=(x); \
+    val_(io).gc = i_g; settt_(io, ctb(i_g->tt)); }
+
+/* }================================================================== */
+
+
+/*
+** {==================================================================
+** Numbers
+** ===================================================================
+*/
+
+/* Variant tags for numbers */
+#define LUA_VNUMINT	makevariant(LUA_TNUMBER, 0)  /* integer numbers */
+#define LUA_VNUMFLT	makevariant(LUA_TNUMBER, 1)  /* float numbers */
+
+#define ttisnumber(o)		checktype((o), LUA_TNUMBER)
+#define ttisfloat(o)		checktag((o), LUA_VNUMFLT)
+#define ttisinteger(o)		checktag((o), LUA_VNUMINT)
+
+#define nvalue(o)	check_exp(ttisnumber(o), \
+	(ttisinteger(o) ? cast_num(ivalue(o)) : fltvalue(o)))
+#define fltvalue(o)	check_exp(ttisfloat(o), val_(o).n)
+#define ivalue(o)	check_exp(ttisinteger(o), val_(o).i)
+
+#define fltvalueraw(v)	((v).n)
+#define ivalueraw(v)	((v).i)
+
+#define setfltvalue(obj,x) \
+  { TValue *io=(obj); val_(io).n=(x); settt_(io, LUA_VNUMFLT); }
+
+#define chgfltvalue(obj,x) \
+  { TValue *io=(obj); lua_assert(ttisfloat(io)); val_(io).n=(x); }
+
+#define setivalue(obj,x) \
+  { TValue *io=(obj); val_(io).i=(x); settt_(io, LUA_VNUMINT); }
+
+#define chgivalue(obj,x) \
+  { TValue *io=(obj); lua_assert(ttisinteger(io)); val_(io).i=(x); }
+
+/* }================================================================== */
+
+
+/*
+** {==================================================================
+** Strings
+** ===================================================================
+*/
+
+/* Variant tags for strings */
+#define LUA_VSHRSTR	makevariant(LUA_TSTRING, 0)  /* short strings */
+#define LUA_VLNGSTR	makevariant(LUA_TSTRING, 1)  /* long strings */
+
+#define ttisstring(o)		checktype((o), LUA_TSTRING)
+#define ttisshrstring(o)	checktag((o), ctb(LUA_VSHRSTR))
+#define ttislngstring(o)	checktag((o), ctb(LUA_VLNGSTR))
+
+#define tsvalueraw(v)	(gco2ts((v).gc))
+
+#define tsvalue(o)	check_exp(ttisstring(o), gco2ts(val_(o).gc))
+
+#define setsvalue(L,obj,x) \
+  { TValue *io = (obj); TString *x_ = (x); \
+    val_(io).gc = obj2gco(x_); settt_(io, ctb(x_->tt)); \
+    checkliveness(L,io); }
+
+/* set a string to the stack */
+#define setsvalue2s(L,o,s)	setsvalue(L,s2v(o),s)
+
+/* set a string to a new object */
+#define setsvalue2n	setsvalue
+
+
+/*
+** Header for a string value.
+*/
+typedef struct TString {
+  CommonHeader;
+  lu_byte extra;  /* reserved words for short strings; "has hash" for longs */
+  lu_byte shrlen;  /* length for short strings, 0xFF for long strings */
+  unsigned int hash;
+  union {
+    size_t lnglen;  /* length for long strings */
+    struct TString *hnext;  /* linked list for hash table */
+  } u;
+  char contents[1];
+} TString;
+
+
+
+/*
+** Get the actual string (array of bytes) from a 'TString'. (Generic
+** version and specialized versions for long and short strings.)
+*/
+#define getstr(ts)	((ts)->contents)
+#define getlngstr(ts)	check_exp((ts)->shrlen == 0xFF, (ts)->contents)
+#define getshrstr(ts)	check_exp((ts)->shrlen != 0xFF, (ts)->contents)
+
+
+/* get string length from 'TString *s' */
+#define tsslen(s)  \
+	((s)->shrlen != 0xFF ? (s)->shrlen : (s)->u.lnglen)
+
+/* }================================================================== */
+
+
+/*
+** {==================================================================
+** Userdata
+** ===================================================================
+*/
+
+
+/*
+** Light userdata should be a variant of userdata, but for compatibility
+** reasons they are also different types.
+*/
+#define LUA_VLIGHTUSERDATA	makevariant(LUA_TLIGHTUSERDATA, 0)
+
+#define LUA_VUSERDATA		makevariant(LUA_TUSERDATA, 0)
+
+#define ttislightuserdata(o)	checktag((o), LUA_VLIGHTUSERDATA)
+#define ttisfulluserdata(o)	checktag((o), ctb(LUA_VUSERDATA))
+
+#define pvalue(o)	check_exp(ttislightuserdata(o), val_(o).p)
+#define uvalue(o)	check_exp(ttisfulluserdata(o), gco2u(val_(o).gc))
+
+#define pvalueraw(v)	((v).p)
+
+#define setpvalue(obj,x) \
+  { TValue *io=(obj); val_(io).p=(x); settt_(io, LUA_VLIGHTUSERDATA); }
+
+#define setuvalue(L,obj,x) \
+  { TValue *io = (obj); Udata *x_ = (x); \
+    val_(io).gc = obj2gco(x_); settt_(io, ctb(LUA_VUSERDATA)); \
+    checkliveness(L,io); }
+
+
+/* Ensures that addresses after this type are always fully aligned. */
+typedef union UValue {
+  TValue uv;
+  LUAI_MAXALIGN;  /* ensures maximum alignment for udata bytes */
+} UValue;
+
+
+/*
+** Header for userdata with user values;
+** memory area follows the end of this structure.
+*/
+typedef struct Udata {
+  CommonHeader;
+  unsigned short nuvalue;  /* number of user values */
+  size_t len;  /* number of bytes */
+  struct Table *metatable;
+  GCObject *gclist;
+  UValue uv[1];  /* user values */
+} Udata;
+
+
+/*
+** Header for userdata with no user values. These userdata do not need
+** to be gray during GC, and therefore do not need a 'gclist' field.
+** To simplify, the code always use 'Udata' for both kinds of userdata,
+** making sure it never accesses 'gclist' on userdata with no user values.
+** This structure here is used only to compute the correct size for
+** this representation. (The 'bindata' field in its end ensures correct
+** alignment for binary data following this header.)
+*/
+typedef struct Udata0 {
+  CommonHeader;
+  unsigned short nuvalue;  /* number of user values */
+  size_t len;  /* number of bytes */
+  struct Table *metatable;
+  union {LUAI_MAXALIGN;} bindata;
+} Udata0;
+
+
+/* compute the offset of the memory area of a userdata */
+#define udatamemoffset(nuv) \
+	((nuv) == 0 ? offsetof(Udata0, bindata)  \
+                    : offsetof(Udata, uv) + (sizeof(UValue) * (nuv)))
+
+/* get the address of the memory block inside 'Udata' */
+#define getudatamem(u)	(cast_charp(u) + udatamemoffset((u)->nuvalue))
+
+/* compute the size of a userdata */
+#define sizeudata(nuv,nb)	(udatamemoffset(nuv) + (nb))
+
+/* }================================================================== */
+
+
+/*
+** {==================================================================
+** Prototypes
+** ===================================================================
+*/
+
+#define LUA_VPROTO	makevariant(LUA_TPROTO, 0)
+
+
+/*
+** Description of an upvalue for function prototypes
+*/
+typedef struct Upvaldesc {
+  TString *name;  /* upvalue name (for debug information) */
+  lu_byte instack;  /* whether it is in stack (register) */
+  lu_byte idx;  /* index of upvalue (in stack or in outer function's list) */
+  lu_byte kind;  /* kind of corresponding variable */
+} Upvaldesc;
+
+
+/*
+** Description of a local variable for function prototypes
+** (used for debug information)
+*/
+typedef struct LocVar {
+  TString *varname;
+  int startpc;  /* first point where variable is active */
+  int endpc;    /* first point where variable is dead */
+} LocVar;
+
+
+/*
+** Associates the absolute line source for a given instruction ('pc').
+** The array 'lineinfo' gives, for each instruction, the difference in
+** lines from the previous instruction. When that difference does not
+** fit into a byte, Lua saves the absolute line for that instruction.
+** (Lua also saves the absolute line periodically, to speed up the
+** computation of a line number: we can use binary search in the
+** absolute-line array, but we must traverse the 'lineinfo' array
+** linearly to compute a line.)
+*/
+typedef struct AbsLineInfo {
+  int pc;
+  int line;
+} AbsLineInfo;
+
+/*
+** Function Prototypes
+*/
+typedef struct Proto {
+  CommonHeader;
+  lu_byte numparams;  /* number of fixed (named) parameters */
+  lu_byte is_vararg;
+  lu_byte maxstacksize;  /* number of registers needed by this function */
+  int sizeupvalues;  /* size of 'upvalues' */
+  int sizek;  /* size of 'k' */
+  int sizecode;
+  int sizelineinfo;
+  int sizep;  /* size of 'p' */
+  int sizelocvars;
+  int sizeabslineinfo;  /* size of 'abslineinfo' */
+  int linedefined;  /* debug information  */
+  int lastlinedefined;  /* debug information  */
+  TValue *k;  /* constants used by the function */
+  Instruction *code;  /* opcodes */
+  struct Proto **p;  /* functions defined inside the function */
+  Upvaldesc *upvalues;  /* upvalue information */
+  ls_byte *lineinfo;  /* information about source lines (debug information) */
+  AbsLineInfo *abslineinfo;  /* idem */
+  LocVar *locvars;  /* information about local variables (debug information) */
+  TString  *source;  /* used for debug information */
+  GCObject *gclist;
+} Proto;
+
+/* }================================================================== */
+
+
+/*
+** {==================================================================
+** Functions
+** ===================================================================
+*/
+
+#define LUA_VUPVAL	makevariant(LUA_TUPVAL, 0)
+
+
+/* Variant tags for functions */
+#define LUA_VLCL	makevariant(LUA_TFUNCTION, 0)  /* Lua closure */
+#define LUA_VLCF	makevariant(LUA_TFUNCTION, 1)  /* light C function */
+#define LUA_VCCL	makevariant(LUA_TFUNCTION, 2)  /* C closure */
+
+#define ttisfunction(o)		checktype(o, LUA_TFUNCTION)
+#define ttisLclosure(o)		checktag((o), ctb(LUA_VLCL))
+#define ttislcf(o)		checktag((o), LUA_VLCF)
+#define ttisCclosure(o)		checktag((o), ctb(LUA_VCCL))
+#define ttisclosure(o)         (ttisLclosure(o) || ttisCclosure(o))
+
+
+#define isLfunction(o)	ttisLclosure(o)
+
+#define clvalue(o)	check_exp(ttisclosure(o), gco2cl(val_(o).gc))
+#define clLvalue(o)	check_exp(ttisLclosure(o), gco2lcl(val_(o).gc))
+#define fvalue(o)	check_exp(ttislcf(o), val_(o).f)
+#define clCvalue(o)	check_exp(ttisCclosure(o), gco2ccl(val_(o).gc))
+
+#define fvalueraw(v)	((v).f)
+
+#define setclLvalue(L,obj,x) \
+  { TValue *io = (obj); LClosure *x_ = (x); \
+    val_(io).gc = obj2gco(x_); settt_(io, ctb(LUA_VLCL)); \
+    checkliveness(L,io); }
+
+#define setclLvalue2s(L,o,cl)	setclLvalue(L,s2v(o),cl)
+
+#define setfvalue(obj,x) \
+  { TValue *io=(obj); val_(io).f=(x); settt_(io, LUA_VLCF); }
+
+#define setclCvalue(L,obj,x) \
+  { TValue *io = (obj); CClosure *x_ = (x); \
+    val_(io).gc = obj2gco(x_); settt_(io, ctb(LUA_VCCL)); \
+    checkliveness(L,io); }
+
+
+/*
+** Upvalues for Lua closures
+*/
+typedef struct UpVal {
+  CommonHeader;
+  union {
+    TValue *p;  /* points to stack or to its own value */
+    ptrdiff_t offset;  /* used while the stack is being reallocated */
+  } v;
+  union {
+    struct {  /* (when open) */
+      struct UpVal *next;  /* linked list */
+      struct UpVal **previous;
+    } open;
+    TValue value;  /* the value (when closed) */
+  } u;
+} UpVal;
+
+
+
+#define ClosureHeader \
+	CommonHeader; lu_byte nupvalues; GCObject *gclist
+
+typedef struct CClosure {
+  ClosureHeader;
+  lua_CFunction f;
+  TValue upvalue[1];  /* list of upvalues */
+} CClosure;
+
+
+typedef struct LClosure {
+  ClosureHeader;
+  struct Proto *p;
+  UpVal *upvals[1];  /* list of upvalues */
+} LClosure;
+
+
+typedef union Closure {
+  CClosure c;
+  LClosure l;
+} Closure;
+
+
+#define getproto(o)	(clLvalue(o)->p)
+
+/* }================================================================== */
+
+
+/*
+** {==================================================================
+** Tables
+** ===================================================================
+*/
+
+#define LUA_VTABLE	makevariant(LUA_TTABLE, 0)
+
+#define ttistable(o)		checktag((o), ctb(LUA_VTABLE))
+
+#define hvalue(o)	check_exp(ttistable(o), gco2t(val_(o).gc))
+
+#define sethvalue(L,obj,x) \
+  { TValue *io = (obj); Table *x_ = (x); \
+    val_(io).gc = obj2gco(x_); settt_(io, ctb(LUA_VTABLE)); \
+    checkliveness(L,io); }
+
+#define sethvalue2s(L,o,h)	sethvalue(L,s2v(o),h)
+
+
+/*
+** Nodes for Hash tables: A pack of two TValue's (key-value pairs)
+** plus a 'next' field to link colliding entries. The distribution
+** of the key's fields ('key_tt' and 'key_val') not forming a proper
+** 'TValue' allows for a smaller size for 'Node' both in 4-byte
+** and 8-byte alignments.
+*/
+typedef union Node {
+  struct NodeKey {
+    TValuefields;  /* fields for value */
+    lu_byte key_tt;  /* key type */
+    int next;  /* for chaining */
+    Value key_val;  /* key value */
+  } u;
+  TValue i_val;  /* direct access to node's value as a proper 'TValue' */
+} Node;
+
+
+/* copy a value into a key */
+#define setnodekey(L,node,obj) \
+	{ Node *n_=(node); const TValue *io_=(obj); \
+	  n_->u.key_val = io_->value_; n_->u.key_tt = io_->tt_; \
+	  checkliveness(L,io_); }
+
+
+/* copy a value from a key */
+#define getnodekey(L,obj,node) \
+	{ TValue *io_=(obj); const Node *n_=(node); \
+	  io_->value_ = n_->u.key_val; io_->tt_ = n_->u.key_tt; \
+	  checkliveness(L,io_); }
+
+
+/*
+** About 'alimit': if 'isrealasize(t)' is true, then 'alimit' is the
+** real size of 'array'. Otherwise, the real size of 'array' is the
+** smallest power of two not smaller than 'alimit' (or zero iff 'alimit'
+** is zero); 'alimit' is then used as a hint for #t.
+*/
+
+#define BITRAS		(1 << 7)
+#define isrealasize(t)		(!((t)->flags & BITRAS))
+#define setrealasize(t)		((t)->flags &= cast_byte(~BITRAS))
+#define setnorealasize(t)	((t)->flags |= BITRAS)
+
+
+typedef struct Table {
+  CommonHeader;
+  lu_byte flags;  /* 1<<p means tagmethod(p) is not present */
+  lu_byte lsizenode;  /* log2 of size of 'node' array */
+  unsigned int alimit;  /* "limit" of 'array' array */
+  TValue *array;  /* array part */
+  Node *node;
+  Node *lastfree;  /* any free position is before this position */
+  struct Table *metatable;
+  GCObject *gclist;
+} Table;
+
+
+/*
+** Macros to manipulate keys inserted in nodes
+*/
+#define keytt(node)		((node)->u.key_tt)
+#define keyval(node)		((node)->u.key_val)
+
+#define keyisnil(node)		(keytt(node) == LUA_TNIL)
+#define keyisinteger(node)	(keytt(node) == LUA_VNUMINT)
+#define keyival(node)		(keyval(node).i)
+#define keyisshrstr(node)	(keytt(node) == ctb(LUA_VSHRSTR))
+#define keystrval(node)		(gco2ts(keyval(node).gc))
+
+#define setnilkey(node)		(keytt(node) = LUA_TNIL)
+
+#define keyiscollectable(n)	(keytt(n) & BIT_ISCOLLECTABLE)
+
+#define gckey(n)	(keyval(n).gc)
+#define gckeyN(n)	(keyiscollectable(n) ? gckey(n) : NULL)
+
+
+/*
+** Dead keys in tables have the tag DEADKEY but keep their original
+** gcvalue. This distinguishes them from regular keys but allows them to
+** be found when searched in a special way. ('next' needs that to find
+** keys removed from a table during a traversal.)
+*/
+#define setdeadkey(node)	(keytt(node) = LUA_TDEADKEY)
+#define keyisdead(node)		(keytt(node) == LUA_TDEADKEY)
+
+/* }================================================================== */
+
+
+
+/*
+** 'module' operation for hashing (size is always a power of 2)
+*/
+#define lmod(s,size) \
+	(check_exp((size&(size-1))==0, (cast_int((s) & ((size)-1)))))
+
+
+#define twoto(x)	(1<<(x))
+#define sizenode(t)	(twoto((t)->lsizenode))
+
+
+/* size of buffer for 'luaO_utf8esc' function */
+#define UTF8BUFFSZ	8
+
+LUAI_FUNC int luaO_utf8esc (char *buff, unsigned long x);
+LUAI_FUNC int luaO_ceillog2 (unsigned int x);
+LUAI_FUNC int luaO_rawarith (lua_State *L, int op, const TValue *p1,
+                             const TValue *p2, TValue *res);
+LUAI_FUNC void luaO_arith (lua_State *L, int op, const TValue *p1,
+                           const TValue *p2, StkId res);
+LUAI_FUNC size_t luaO_str2num (const char *s, TValue *o);
+LUAI_FUNC int luaO_hexavalue (int c);
+LUAI_FUNC void luaO_tostring (lua_State *L, TValue *obj);
+LUAI_FUNC const char *luaO_pushvfstring (lua_State *L, const char *fmt,
+                                                       va_list argp);
+LUAI_FUNC const char *luaO_pushfstring (lua_State *L, const char *fmt, ...);
+LUAI_FUNC void luaO_chunkid (char *out, const char *source, size_t srclen);
+
+
+#endif
+
@@ -0,0 +1,104 @@
+/*
+** $Id: lopcodes.c $
+** Opcodes for Lua virtual machine
+** See Copyright Notice in lua.h
+*/
+
+#define lopcodes_c
+#define LUA_CORE
+
+#include "lprefix.h"
+
+
+#include "lopcodes.h"
+
+
+/* ORDER OP */
+
+LUAI_DDEF const lu_byte luaP_opmodes[NUM_OPCODES] = {
+/*       MM OT IT T  A  mode		   opcode  */
+  opmode(0, 0, 0, 0, 1, iABC)		/* OP_MOVE */
+ ,opmode(0, 0, 0, 0, 1, iAsBx)		/* OP_LOADI */
+ ,opmode(0, 0, 0, 0, 1, iAsBx)		/* OP_LOADF */
+ ,opmode(0, 0, 0, 0, 1, iABx)		/* OP_LOADK */
+ ,opmode(0, 0, 0, 0, 1, iABx)		/* OP_LOADKX */
+ ,opmode(0, 0, 0, 0, 1, iABC)		/* OP_LOADFALSE */
+ ,opmode(0, 0, 0, 0, 1, iABC)		/* OP_LFALSESKIP */
+ ,opmode(0, 0, 0, 0, 1, iABC)		/* OP_LOADTRUE */
+ ,opmode(0, 0, 0, 0, 1, iABC)		/* OP_LOADNIL */
+ ,opmode(0, 0, 0, 0, 1, iABC)		/* OP_GETUPVAL */
+ ,opmode(0, 0, 0, 0, 0, iABC)		/* OP_SETUPVAL */
+ ,opmode(0, 0, 0, 0, 1, iABC)		/* OP_GETTABUP */
+ ,opmode(0, 0, 0, 0, 1, iABC)		/* OP_GETTABLE */
+ ,opmode(0, 0, 0, 0, 1, iABC)		/* OP_GETI */
+ ,opmode(0, 0, 0, 0, 1, iABC)		/* OP_GETFIELD */
+ ,opmode(0, 0, 0, 0, 0, iABC)		/* OP_SETTABUP */
+ ,opmode(0, 0, 0, 0, 0, iABC)		/* OP_SETTABLE */
+ ,opmode(0, 0, 0, 0, 0, iABC)		/* OP_SETI */
+ ,opmode(0, 0, 0, 0, 0, iABC)		/* OP_SETFIELD */
+ ,opmode(0, 0, 0, 0, 1, iABC)		/* OP_NEWTABLE */
+ ,opmode(0, 0, 0, 0, 1, iABC)		/* OP_SELF */
+ ,opmode(0, 0, 0, 0, 1, iABC)		/* OP_ADDI */
+ ,opmode(0, 0, 0, 0, 1, iABC)		/* OP_ADDK */
+ ,opmode(0, 0, 0, 0, 1, iABC)		/* OP_SUBK */
+ ,opmode(0, 0, 0, 0, 1, iABC)		/* OP_MULK */
+ ,opmode(0, 0, 0, 0, 1, iABC)		/* OP_MODK */
+ ,opmode(0, 0, 0, 0, 1, iABC)		/* OP_POWK */
+ ,opmode(0, 0, 0, 0, 1, iABC)		/* OP_DIVK */
+ ,opmode(0, 0, 0, 0, 1, iABC)		/* OP_IDIVK */
+ ,opmode(0, 0, 0, 0, 1, iABC)		/* OP_BANDK */
+ ,opmode(0, 0, 0, 0, 1, iABC)		/* OP_BORK */
+ ,opmode(0, 0, 0, 0, 1, iABC)		/* OP_BXORK */
+ ,opmode(0, 0, 0, 0, 1, iABC)		/* OP_SHRI */
+ ,opmode(0, 0, 0, 0, 1, iABC)		/* OP_SHLI */
+ ,opmode(0, 0, 0, 0, 1, iABC)		/* OP_ADD */
+ ,opmode(0, 0, 0, 0, 1, iABC)		/* OP_SUB */
+ ,opmode(0, 0, 0, 0, 1, iABC)		/* OP_MUL */
+ ,opmode(0, 0, 0, 0, 1, iABC)		/* OP_MOD */
+ ,opmode(0, 0, 0, 0, 1, iABC)		/* OP_POW */
+ ,opmode(0, 0, 0, 0, 1, iABC)		/* OP_DIV */
+ ,opmode(0, 0, 0, 0, 1, iABC)		/* OP_IDIV */
+ ,opmode(0, 0, 0, 0, 1, iABC)		/* OP_BAND */
+ ,opmode(0, 0, 0, 0, 1, iABC)		/* OP_BOR */
+ ,opmode(0, 0, 0, 0, 1, iABC)		/* OP_BXOR */
+ ,opmode(0, 0, 0, 0, 1, iABC)		/* OP_SHL */
+ ,opmode(0, 0, 0, 0, 1, iABC)		/* OP_SHR */
+ ,opmode(1, 0, 0, 0, 0, iABC)		/* OP_MMBIN */
+ ,opmode(1, 0, 0, 0, 0, iABC)		/* OP_MMBINI*/
+ ,opmode(1, 0, 0, 0, 0, iABC)		/* OP_MMBINK*/
+ ,opmode(0, 0, 0, 0, 1, iABC)		/* OP_UNM */
+ ,opmode(0, 0, 0, 0, 1, iABC)		/* OP_BNOT */
+ ,opmode(0, 0, 0, 0, 1, iABC)		/* OP_NOT */
+ ,opmode(0, 0, 0, 0, 1, iABC)		/* OP_LEN */
+ ,opmode(0, 0, 0, 0, 1, iABC)		/* OP_CONCAT */
+ ,opmode(0, 0, 0, 0, 0, iABC)		/* OP_CLOSE */
+ ,opmode(0, 0, 0, 0, 0, iABC)		/* OP_TBC */
+ ,opmode(0, 0, 0, 0, 0, isJ)		/* OP_JMP */
+ ,opmode(0, 0, 0, 1, 0, iABC)		/* OP_EQ */
+ ,opmode(0, 0, 0, 1, 0, iABC)		/* OP_LT */
+ ,opmode(0, 0, 0, 1, 0, iABC)		/* OP_LE */
+ ,opmode(0, 0, 0, 1, 0, iABC)		/* OP_EQK */
+ ,opmode(0, 0, 0, 1, 0, iABC)		/* OP_EQI */
+ ,opmode(0, 0, 0, 1, 0, iABC)		/* OP_LTI */
+ ,opmode(0, 0, 0, 1, 0, iABC)		/* OP_LEI */
+ ,opmode(0, 0, 0, 1, 0, iABC)		/* OP_GTI */
+ ,opmode(0, 0, 0, 1, 0, iABC)		/* OP_GEI */
+ ,opmode(0, 0, 0, 1, 0, iABC)		/* OP_TEST */
+ ,opmode(0, 0, 0, 1, 1, iABC)		/* OP_TESTSET */
+ ,opmode(0, 1, 1, 0, 1, iABC)		/* OP_CALL */
+ ,opmode(0, 1, 1, 0, 1, iABC)		/* OP_TAILCALL */
+ ,opmode(0, 0, 1, 0, 0, iABC)		/* OP_RETURN */
+ ,opmode(0, 0, 0, 0, 0, iABC)		/* OP_RETURN0 */
+ ,opmode(0, 0, 0, 0, 0, iABC)		/* OP_RETURN1 */
+ ,opmode(0, 0, 0, 0, 1, iABx)		/* OP_FORLOOP */
+ ,opmode(0, 0, 0, 0, 1, iABx)		/* OP_FORPREP */
+ ,opmode(0, 0, 0, 0, 0, iABx)		/* OP_TFORPREP */
+ ,opmode(0, 0, 0, 0, 0, iABC)		/* OP_TFORCALL */
+ ,opmode(0, 0, 0, 0, 1, iABx)		/* OP_TFORLOOP */
+ ,opmode(0, 0, 1, 0, 0, iABC)		/* OP_SETLIST */
+ ,opmode(0, 0, 0, 0, 1, iABx)		/* OP_CLOSURE */
+ ,opmode(0, 1, 0, 0, 1, iABC)		/* OP_VARARG */
+ ,opmode(0, 0, 1, 0, 1, iABC)		/* OP_VARARGPREP */
+ ,opmode(0, 0, 0, 0, 0, iAx)		/* OP_EXTRAARG */
+};
+
@@ -0,0 +1,405 @@
+/*
+** $Id: lopcodes.h $
+** Opcodes for Lua virtual machine
+** See Copyright Notice in lua.h
+*/
+
+#ifndef lopcodes_h
+#define lopcodes_h
+
+#include "llimits.h"
+
+
+/*===========================================================================
+  We assume that instructions are unsigned 32-bit integers.
+  All instructions have an opcode in the first 7 bits.
+  Instructions can have the following formats:
+
+        3 3 2 2 2 2 2 2 2 2 2 2 1 1 1 1 1 1 1 1 1 1 0 0 0 0 0 0 0 0 0 0
+        1 0 9 8 7 6 5 4 3 2 1 0 9 8 7 6 5 4 3 2 1 0 9 8 7 6 5 4 3 2 1 0
+iABC          C(8)     |      B(8)     |k|     A(8)      |   Op(7)     |
+iABx                Bx(17)               |     A(8)      |   Op(7)     |
+iAsBx              sBx (signed)(17)      |     A(8)      |   Op(7)     |
+iAx                           Ax(25)                     |   Op(7)     |
+isJ                           sJ (signed)(25)            |   Op(7)     |
+
+  A signed argument is represented in excess K: the represented value is
+  the written unsigned value minus K, where K is half the maximum for the
+  corresponding unsigned argument.
+===========================================================================*/
+
+
+enum OpMode {iABC, iABx, iAsBx, iAx, isJ};  /* basic instruction formats */
+
+
+/*
+** size and position of opcode arguments.
+*/
+#define SIZE_C		8
+#define SIZE_B		8
+#define SIZE_Bx		(SIZE_C + SIZE_B + 1)
+#define SIZE_A		8
+#define SIZE_Ax		(SIZE_Bx + SIZE_A)
+#define SIZE_sJ		(SIZE_Bx + SIZE_A)
+
+#define SIZE_OP		7
+
+#define POS_OP		0
+
+#define POS_A		(POS_OP + SIZE_OP)
+#define POS_k		(POS_A + SIZE_A)
+#define POS_B		(POS_k + 1)
+#define POS_C		(POS_B + SIZE_B)
+
+#define POS_Bx		POS_k
+
+#define POS_Ax		POS_A
+
+#define POS_sJ		POS_A
+
+
+/*
+** limits for opcode arguments.
+** we use (signed) 'int' to manipulate most arguments,
+** so they must fit in ints.
+*/
+
+/* Check whether type 'int' has at least 'b' bits ('b' < 32) */
+#define L_INTHASBITS(b)		((UINT_MAX >> ((b) - 1)) >= 1)
+
+
+#if L_INTHASBITS(SIZE_Bx)
+#define MAXARG_Bx	((1<<SIZE_Bx)-1)
+#else
+#define MAXARG_Bx	MAX_INT
+#endif
+
+#define OFFSET_sBx	(MAXARG_Bx>>1)         /* 'sBx' is signed */
+
+
+#if L_INTHASBITS(SIZE_Ax)
+#define MAXARG_Ax	((1<<SIZE_Ax)-1)
+#else
+#define MAXARG_Ax	MAX_INT
+#endif
+
+#if L_INTHASBITS(SIZE_sJ)
+#define MAXARG_sJ	((1 << SIZE_sJ) - 1)
+#else
+#define MAXARG_sJ	MAX_INT
+#endif
+
+#define OFFSET_sJ	(MAXARG_sJ >> 1)
+
+
+#define MAXARG_A	((1<<SIZE_A)-1)
+#define MAXARG_B	((1<<SIZE_B)-1)
+#define MAXARG_C	((1<<SIZE_C)-1)
+#define OFFSET_sC	(MAXARG_C >> 1)
+
+#define int2sC(i)	((i) + OFFSET_sC)
+#define sC2int(i)	((i) - OFFSET_sC)
+
+
+/* creates a mask with 'n' 1 bits at position 'p' */
+#define MASK1(n,p)	((~((~(Instruction)0)<<(n)))<<(p))
+
+/* creates a mask with 'n' 0 bits at position 'p' */
+#define MASK0(n,p)	(~MASK1(n,p))
+
+/*
+** the following macros help to manipulate instructions
+*/
+
+#define GET_OPCODE(i)	(cast(OpCode, ((i)>>POS_OP) & MASK1(SIZE_OP,0)))
+#define SET_OPCODE(i,o)	((i) = (((i)&MASK0(SIZE_OP,POS_OP)) | \
+		((cast(Instruction, o)<<POS_OP)&MASK1(SIZE_OP,POS_OP))))
+
+#define checkopm(i,m)	(getOpMode(GET_OPCODE(i)) == m)
+
+
+#define getarg(i,pos,size)	(cast_int(((i)>>(pos)) & MASK1(size,0)))
+#define setarg(i,v,pos,size)	((i) = (((i)&MASK0(size,pos)) | \
+                ((cast(Instruction, v)<<pos)&MASK1(size,pos))))
+
+#define GETARG_A(i)	getarg(i, POS_A, SIZE_A)
+#define SETARG_A(i,v)	setarg(i, v, POS_A, SIZE_A)
+
+#define GETARG_B(i)	check_exp(checkopm(i, iABC), getarg(i, POS_B, SIZE_B))
+#define GETARG_sB(i)	sC2int(GETARG_B(i))
+#define SETARG_B(i,v)	setarg(i, v, POS_B, SIZE_B)
+
+#define GETARG_C(i)	check_exp(checkopm(i, iABC), getarg(i, POS_C, SIZE_C))
+#define GETARG_sC(i)	sC2int(GETARG_C(i))
+#define SETARG_C(i,v)	setarg(i, v, POS_C, SIZE_C)
+
+#define TESTARG_k(i)	check_exp(checkopm(i, iABC), (cast_int(((i) & (1u << POS_k)))))
+#define GETARG_k(i)	check_exp(checkopm(i, iABC), getarg(i, POS_k, 1))
+#define SETARG_k(i,v)	setarg(i, v, POS_k, 1)
+
+#define GETARG_Bx(i)	check_exp(checkopm(i, iABx), getarg(i, POS_Bx, SIZE_Bx))
+#define SETARG_Bx(i,v)	setarg(i, v, POS_Bx, SIZE_Bx)
+
+#define GETARG_Ax(i)	check_exp(checkopm(i, iAx), getarg(i, POS_Ax, SIZE_Ax))
+#define SETARG_Ax(i,v)	setarg(i, v, POS_Ax, SIZE_Ax)
+
+#define GETARG_sBx(i)  \
+	check_exp(checkopm(i, iAsBx), getarg(i, POS_Bx, SIZE_Bx) - OFFSET_sBx)
+#define SETARG_sBx(i,b)	SETARG_Bx((i),cast_uint((b)+OFFSET_sBx))
+
+#define GETARG_sJ(i)  \
+	check_exp(checkopm(i, isJ), getarg(i, POS_sJ, SIZE_sJ) - OFFSET_sJ)
+#define SETARG_sJ(i,j) \
+	setarg(i, cast_uint((j)+OFFSET_sJ), POS_sJ, SIZE_sJ)
+
+
+#define CREATE_ABCk(o,a,b,c,k)	((cast(Instruction, o)<<POS_OP) \
+			| (cast(Instruction, a)<<POS_A) \
+			| (cast(Instruction, b)<<POS_B) \
+			| (cast(Instruction, c)<<POS_C) \
+			| (cast(Instruction, k)<<POS_k))
+
+#define CREATE_ABx(o,a,bc)	((cast(Instruction, o)<<POS_OP) \
+			| (cast(Instruction, a)<<POS_A) \
+			| (cast(Instruction, bc)<<POS_Bx))
+
+#define CREATE_Ax(o,a)		((cast(Instruction, o)<<POS_OP) \
+			| (cast(Instruction, a)<<POS_Ax))
+
+#define CREATE_sJ(o,j,k)	((cast(Instruction, o) << POS_OP) \
+			| (cast(Instruction, j) << POS_sJ) \
+			| (cast(Instruction, k) << POS_k))
+
+
+#if !defined(MAXINDEXRK)  /* (for debugging only) */
+#define MAXINDEXRK	MAXARG_B
+#endif
+
+
+/*
+** invalid register that fits in 8 bits
+*/
+#define NO_REG		MAXARG_A
+
+
+/*
+** R[x] - register
+** K[x] - constant (in constant table)
+** RK(x) == if k(i) then K[x] else R[x]
+*/
+
+
+/*
+** Grep "ORDER OP" if you change these enums. Opcodes marked with a (*)
+** has extra descriptions in the notes after the enumeration.
+*/
+
+typedef enum {
+/*----------------------------------------------------------------------
+  name		args	description
+------------------------------------------------------------------------*/
+OP_MOVE,/*	A B	R[A] := R[B]					*/
+OP_LOADI,/*	A sBx	R[A] := sBx					*/
+OP_LOADF,/*	A sBx	R[A] := (lua_Number)sBx				*/
+OP_LOADK,/*	A Bx	R[A] := K[Bx]					*/
+OP_LOADKX,/*	A	R[A] := K[extra arg]				*/
+OP_LOADFALSE,/*	A	R[A] := false					*/
+OP_LFALSESKIP,/*A	R[A] := false; pc++	(*)			*/
+OP_LOADTRUE,/*	A	R[A] := true					*/
+OP_LOADNIL,/*	A B	R[A], R[A+1], ..., R[A+B] := nil		*/
+OP_GETUPVAL,/*	A B	R[A] := UpValue[B]				*/
+OP_SETUPVAL,/*	A B	UpValue[B] := R[A]				*/
+
+OP_GETTABUP,/*	A B C	R[A] := UpValue[B][K[C]:shortstring]		*/
+OP_GETTABLE,/*	A B C	R[A] := R[B][R[C]]				*/
+OP_GETI,/*	A B C	R[A] := R[B][C]					*/
+OP_GETFIELD,/*	A B C	R[A] := R[B][K[C]:shortstring]			*/
+
+OP_SETTABUP,/*	A B C	UpValue[A][K[B]:shortstring] := RK(C)		*/
+OP_SETTABLE,/*	A B C	R[A][R[B]] := RK(C)				*/
+OP_SETI,/*	A B C	R[A][B] := RK(C)				*/
+OP_SETFIELD,/*	A B C	R[A][K[B]:shortstring] := RK(C)			*/
+
+OP_NEWTABLE,/*	A B C k	R[A] := {}					*/
+
+OP_SELF,/*	A B C	R[A+1] := R[B]; R[A] := R[B][RK(C):string]	*/
+
+OP_ADDI,/*	A B sC	R[A] := R[B] + sC				*/
+
+OP_ADDK,/*	A B C	R[A] := R[B] + K[C]:number			*/
+OP_SUBK,/*	A B C	R[A] := R[B] - K[C]:number			*/
+OP_MULK,/*	A B C	R[A] := R[B] * K[C]:number			*/
+OP_MODK,/*	A B C	R[A] := R[B] % K[C]:number			*/
+OP_POWK,/*	A B C	R[A] := R[B] ^ K[C]:number			*/
+OP_DIVK,/*	A B C	R[A] := R[B] / K[C]:number			*/
+OP_IDIVK,/*	A B C	R[A] := R[B] // K[C]:number			*/
+
+OP_BANDK,/*	A B C	R[A] := R[B] & K[C]:integer			*/
+OP_BORK,/*	A B C	R[A] := R[B] | K[C]:integer			*/
+OP_BXORK,/*	A B C	R[A] := R[B] ~ K[C]:integer			*/
+
+OP_SHRI,/*	A B sC	R[A] := R[B] >> sC				*/
+OP_SHLI,/*	A B sC	R[A] := sC << R[B]				*/
+
+OP_ADD,/*	A B C	R[A] := R[B] + R[C]				*/
+OP_SUB,/*	A B C	R[A] := R[B] - R[C]				*/
+OP_MUL,/*	A B C	R[A] := R[B] * R[C]				*/
+OP_MOD,/*	A B C	R[A] := R[B] % R[C]				*/
+OP_POW,/*	A B C	R[A] := R[B] ^ R[C]				*/
+OP_DIV,/*	A B C	R[A] := R[B] / R[C]				*/
+OP_IDIV,/*	A B C	R[A] := R[B] // R[C]				*/
+
+OP_BAND,/*	A B C	R[A] := R[B] & R[C]				*/
+OP_BOR,/*	A B C	R[A] := R[B] | R[C]				*/
+OP_BXOR,/*	A B C	R[A] := R[B] ~ R[C]				*/
+OP_SHL,/*	A B C	R[A] := R[B] << R[C]				*/
+OP_SHR,/*	A B C	R[A] := R[B] >> R[C]				*/
+
+OP_MMBIN,/*	A B C	call C metamethod over R[A] and R[B]	(*)	*/
+OP_MMBINI,/*	A sB C k	call C metamethod over R[A] and sB	*/
+OP_MMBINK,/*	A B C k		call C metamethod over R[A] and K[B]	*/
+
+OP_UNM,/*	A B	R[A] := -R[B]					*/
+OP_BNOT,/*	A B	R[A] := ~R[B]					*/
+OP_NOT,/*	A B	R[A] := not R[B]				*/
+OP_LEN,/*	A B	R[A] := #R[B] (length operator)			*/
+
+OP_CONCAT,/*	A B	R[A] := R[A].. ... ..R[A + B - 1]		*/
+
+OP_CLOSE,/*	A	close all upvalues >= R[A]			*/
+OP_TBC,/*	A	mark variable A "to be closed"			*/
+OP_JMP,/*	sJ	pc += sJ					*/
+OP_EQ,/*	A B k	if ((R[A] == R[B]) ~= k) then pc++		*/
+OP_LT,/*	A B k	if ((R[A] <  R[B]) ~= k) then pc++		*/
+OP_LE,/*	A B k	if ((R[A] <= R[B]) ~= k) then pc++		*/
+
+OP_EQK,/*	A B k	if ((R[A] == K[B]) ~= k) then pc++		*/
+OP_EQI,/*	A sB k	if ((R[A] == sB) ~= k) then pc++		*/
+OP_LTI,/*	A sB k	if ((R[A] < sB) ~= k) then pc++			*/
+OP_LEI,/*	A sB k	if ((R[A] <= sB) ~= k) then pc++		*/
+OP_GTI,/*	A sB k	if ((R[A] > sB) ~= k) then pc++			*/
+OP_GEI,/*	A sB k	if ((R[A] >= sB) ~= k) then pc++		*/
+
+OP_TEST,/*	A k	if (not R[A] == k) then pc++			*/
+OP_TESTSET,/*	A B k	if (not R[B] == k) then pc++ else R[A] := R[B] (*) */
+
+OP_CALL,/*	A B C	R[A], ... ,R[A+C-2] := R[A](R[A+1], ... ,R[A+B-1]) */
+OP_TAILCALL,/*	A B C k	return R[A](R[A+1], ... ,R[A+B-1])		*/
+
+OP_RETURN,/*	A B C k	return R[A], ... ,R[A+B-2]	(see note)	*/
+OP_RETURN0,/*		return						*/
+OP_RETURN1,/*	A	return R[A]					*/
+
+OP_FORLOOP,/*	A Bx	update counters; if loop continues then pc-=Bx; */
+OP_FORPREP,/*	A Bx	<check values and prepare counters>;
+                        if not to run then pc+=Bx+1;			*/
+
+OP_TFORPREP,/*	A Bx	create upvalue for R[A + 3]; pc+=Bx		*/
+OP_TFORCALL,/*	A C	R[A+4], ... ,R[A+3+C] := R[A](R[A+1], R[A+2]);	*/
+OP_TFORLOOP,/*	A Bx	if R[A+2] ~= nil then { R[A]=R[A+2]; pc -= Bx }	*/
+
+OP_SETLIST,/*	A B C k	R[A][C+i] := R[A+i], 1 <= i <= B		*/
+
+OP_CLOSURE,/*	A Bx	R[A] := closure(KPROTO[Bx])			*/
+
+OP_VARARG,/*	A C	R[A], R[A+1], ..., R[A+C-2] = vararg		*/
+
+OP_VARARGPREP,/*A	(adjust vararg parameters)			*/
+
+OP_EXTRAARG/*	Ax	extra (larger) argument for previous opcode	*/
+} OpCode;
+
+
+#define NUM_OPCODES	((int)(OP_EXTRAARG) + 1)
+
+
+
+/*===========================================================================
+  Notes:
+
+  (*) Opcode OP_LFALSESKIP is used to convert a condition to a boolean
+  value, in a code equivalent to (not cond ? false : true).  (It
+  produces false and skips the next instruction producing true.)
+
+  (*) Opcodes OP_MMBIN and variants follow each arithmetic and
+  bitwise opcode. If the operation succeeds, it skips this next
+  opcode. Otherwise, this opcode calls the corresponding metamethod.
+
+  (*) Opcode OP_TESTSET is used in short-circuit expressions that need
+  both to jump and to produce a value, such as (a = b or c).
+
+  (*) In OP_CALL, if (B == 0) then B = top - A. If (C == 0), then
+  'top' is set to last_result+1, so next open instruction (OP_CALL,
+  OP_RETURN*, OP_SETLIST) may use 'top'.
+
+  (*) In OP_VARARG, if (C == 0) then use actual number of varargs and
+  set top (like in OP_CALL with C == 0).
+
+  (*) In OP_RETURN, if (B == 0) then return up to 'top'.
+
+  (*) In OP_LOADKX and OP_NEWTABLE, the next instruction is always
+  OP_EXTRAARG.
+
+  (*) In OP_SETLIST, if (B == 0) then real B = 'top'; if k, then
+  real C = EXTRAARG _ C (the bits of EXTRAARG concatenated with the
+  bits of C).
+
+  (*) In OP_NEWTABLE, B is log2 of the hash size (which is always a
+  power of 2) plus 1, or zero for size zero. If not k, the array size
+  is C. Otherwise, the array size is EXTRAARG _ C.
+
+  (*) For comparisons, k specifies what condition the test should accept
+  (true or false).
+
+  (*) In OP_MMBINI/OP_MMBINK, k means the arguments were flipped
+   (the constant is the first operand).
+
+  (*) All 'skips' (pc++) assume that next instruction is a jump.
+
+  (*) In instructions OP_RETURN/OP_TAILCALL, 'k' specifies that the
+  function builds upvalues, which may need to be closed. C > 0 means
+  the function is vararg, so that its 'func' must be corrected before
+  returning; in this case, (C - 1) is its number of fixed parameters.
+
+  (*) In comparisons with an immediate operand, C signals whether the
+  original operand was a float. (It must be corrected in case of
+  metamethods.)
+
+===========================================================================*/
+
+
+/*
+** masks for instruction properties. The format is:
+** bits 0-2: op mode
+** bit 3: instruction set register A
+** bit 4: operator is a test (next instruction must be a jump)
+** bit 5: instruction uses 'L->top' set by previous instruction (when B == 0)
+** bit 6: instruction sets 'L->top' for next instruction (when C == 0)
+** bit 7: instruction is an MM instruction (call a metamethod)
+*/
+
+LUAI_DDEC(const lu_byte luaP_opmodes[NUM_OPCODES];)
+
+#define getOpMode(m)	(cast(enum OpMode, luaP_opmodes[m] & 7))
+#define testAMode(m)	(luaP_opmodes[m] & (1 << 3))
+#define testTMode(m)	(luaP_opmodes[m] & (1 << 4))
+#define testITMode(m)	(luaP_opmodes[m] & (1 << 5))
+#define testOTMode(m)	(luaP_opmodes[m] & (1 << 6))
+#define testMMMode(m)	(luaP_opmodes[m] & (1 << 7))
+
+/* "out top" (set top for next instruction) */
+#define isOT(i)  \
+	((testOTMode(GET_OPCODE(i)) && GETARG_C(i) == 0) || \
+          GET_OPCODE(i) == OP_TAILCALL)
+
+/* "in top" (uses top from previous instruction) */
+#define isIT(i)		(testITMode(GET_OPCODE(i)) && GETARG_B(i) == 0)
+
+#define opmode(mm,ot,it,t,a,m)  \
+    (((mm) << 7) | ((ot) << 6) | ((it) << 5) | ((t) << 4) | ((a) << 3) | (m))
+
+
+/* number of list items to accumulate before a SETLIST instruction */
+#define LFIELDS_PER_FLUSH	50
+
+#endif
@@ -0,0 +1,103 @@
+/*
+** $Id: lopnames.h $
+** Opcode names
+** See Copyright Notice in lua.h
+*/
+
+#if !defined(lopnames_h)
+#define lopnames_h
+
+#include <stddef.h>
+
+
+/* ORDER OP */
+
+static const char *const opnames[] = {
+  "MOVE",
+  "LOADI",
+  "LOADF",
+  "LOADK",
+  "LOADKX",
+  "LOADFALSE",
+  "LFALSESKIP",
+  "LOADTRUE",
+  "LOADNIL",
+  "GETUPVAL",
+  "SETUPVAL",
+  "GETTABUP",
+  "GETTABLE",
+  "GETI",
+  "GETFIELD",
+  "SETTABUP",
+  "SETTABLE",
+  "SETI",
+  "SETFIELD",
+  "NEWTABLE",
+  "SELF",
+  "ADDI",
+  "ADDK",
+  "SUBK",
+  "MULK",
+  "MODK",
+  "POWK",
+  "DIVK",
+  "IDIVK",
+  "BANDK",
+  "BORK",
+  "BXORK",
+  "SHRI",
+  "SHLI",
+  "ADD",
+  "SUB",
+  "MUL",
+  "MOD",
+  "POW",
+  "DIV",
+  "IDIV",
+  "BAND",
+  "BOR",
+  "BXOR",
+  "SHL",
+  "SHR",
+  "MMBIN",
+  "MMBINI",
+  "MMBINK",
+  "UNM",
+  "BNOT",
+  "NOT",
+  "LEN",
+  "CONCAT",
+  "CLOSE",
+  "TBC",
+  "JMP",
+  "EQ",
+  "LT",
+  "LE",
+  "EQK",
+  "EQI",
+  "LTI",
+  "LEI",
+  "GTI",
+  "GEI",
+  "TEST",
+  "TESTSET",
+  "CALL",
+  "TAILCALL",
+  "RETURN",
+  "RETURN0",
+  "RETURN1",
+  "FORLOOP",
+  "FORPREP",
+  "TFORPREP",
+  "TFORCALL",
+  "TFORLOOP",
+  "SETLIST",
+  "CLOSURE",
+  "VARARG",
+  "VARARGPREP",
+  "EXTRAARG",
+  NULL
+};
+
+#endif
+
@@ -0,0 +1,430 @@
+/*
+** $Id: loslib.c $
+** Standard Operating System library
+** See Copyright Notice in lua.h
+*/
+
+#define loslib_c
+#define LUA_LIB
+
+#include "lprefix.h"
+
+
+#include <errno.h>
+#include <locale.h>
+#include <stdlib.h>
+#include <string.h>
+#include <time.h>
+
+#include "lua.h"
+
+#include "lauxlib.h"
+#include "lualib.h"
+
+
+/*
+** {==================================================================
+** List of valid conversion specifiers for the 'strftime' function;
+** options are grouped by length; group of length 2 start with '||'.
+** ===================================================================
+*/
+#if !defined(LUA_STRFTIMEOPTIONS)	/* { */
+
+#if defined(LUA_USE_WINDOWS)
+#define LUA_STRFTIMEOPTIONS  "aAbBcdHIjmMpSUwWxXyYzZ%" \
+    "||" "#c#x#d#H#I#j#m#M#S#U#w#W#y#Y"  /* two-char options */
+#elif defined(LUA_USE_C89)  /* ANSI C 89 (only 1-char options) */
+#define LUA_STRFTIMEOPTIONS  "aAbBcdHIjmMpSUwWxXyYZ%"
+#else  /* C99 specification */
+#define LUA_STRFTIMEOPTIONS  "aAbBcCdDeFgGhHIjmMnprRStTuUVwWxXyYzZ%" \
+    "||" "EcECExEXEyEY" "OdOeOHOIOmOMOSOuOUOVOwOWOy"  /* two-char options */
+#endif
+
+#endif					/* } */
+/* }================================================================== */
+
+
+/*
+** {==================================================================
+** Configuration for time-related stuff
+** ===================================================================
+*/
+
+/*
+** type to represent time_t in Lua
+*/
+#if !defined(LUA_NUMTIME)	/* { */
+
+#define l_timet			lua_Integer
+#define l_pushtime(L,t)		lua_pushinteger(L,(lua_Integer)(t))
+#define l_gettime(L,arg)	luaL_checkinteger(L, arg)
+
+#else				/* }{ */
+
+#define l_timet			lua_Number
+#define l_pushtime(L,t)		lua_pushnumber(L,(lua_Number)(t))
+#define l_gettime(L,arg)	luaL_checknumber(L, arg)
+
+#endif				/* } */
+
+
+#if !defined(l_gmtime)		/* { */
+/*
+** By default, Lua uses gmtime/localtime, except when POSIX is available,
+** where it uses gmtime_r/localtime_r
+*/
+
+#if defined(LUA_USE_POSIX)	/* { */
+
+#define l_gmtime(t,r)		gmtime_r(t,r)
+#define l_localtime(t,r)	localtime_r(t,r)
+
+#else				/* }{ */
+
+/* ISO C definitions */
+#define l_gmtime(t,r)		((void)(r)->tm_sec, gmtime(t))
+#define l_localtime(t,r)	((void)(r)->tm_sec, localtime(t))
+
+#endif				/* } */
+
+#endif				/* } */
+
+/* }================================================================== */
+
+
+/*
+** {==================================================================
+** Configuration for 'tmpnam':
+** By default, Lua uses tmpnam except when POSIX is available, where
+** it uses mkstemp.
+** ===================================================================
+*/
+#if !defined(lua_tmpnam)	/* { */
+
+#if defined(LUA_USE_POSIX)	/* { */
+
+#include <unistd.h>
+
+#define LUA_TMPNAMBUFSIZE	32
+
+#if !defined(LUA_TMPNAMTEMPLATE)
+#define LUA_TMPNAMTEMPLATE	"/tmp/lua_XXXXXX"
+#endif
+
+#define lua_tmpnam(b,e) { \
+        strcpy(b, LUA_TMPNAMTEMPLATE); \
+        e = mkstemp(b); \
+        if (e != -1) close(e); \
+        e = (e == -1); }
+
+#else				/* }{ */
+
+/* ISO C definitions */
+#define LUA_TMPNAMBUFSIZE	L_tmpnam
+#define lua_tmpnam(b,e)		{ e = (tmpnam(b) == NULL); }
+
+#endif				/* } */
+
+#endif				/* } */
+/* }================================================================== */
+
+
+#if !defined(l_system)
+#if defined(LUA_USE_IOS)
+/* Despite claiming to be ISO C, iOS does not implement 'system'. */
+#define l_system(cmd) ((cmd) == NULL ? 0 : -1)
+#else
+#define l_system(cmd)	system(cmd)  /* default definition */
+#endif
+#endif
+
+
+static int os_execute (lua_State *L) {
+  const char *cmd = luaL_optstring(L, 1, NULL);
+  int stat;
+  errno = 0;
+  stat = l_system(cmd);
+  if (cmd != NULL)
+    return luaL_execresult(L, stat);
+  else {
+    lua_pushboolean(L, stat);  /* true if there is a shell */
+    return 1;
+  }
+}
+
+
+static int os_remove (lua_State *L) {
+  const char *filename = luaL_checkstring(L, 1);
+  errno = 0;
+  return luaL_fileresult(L, remove(filename) == 0, filename);
+}
+
+
+static int os_rename (lua_State *L) {
+  const char *fromname = luaL_checkstring(L, 1);
+  const char *toname = luaL_checkstring(L, 2);
+  errno = 0;
+  return luaL_fileresult(L, rename(fromname, toname) == 0, NULL);
+}
+
+
+static int os_tmpname (lua_State *L) {
+  char buff[LUA_TMPNAMBUFSIZE];
+  int err;
+  lua_tmpnam(buff, err);
+  if (l_unlikely(err))
+    return luaL_error(L, "unable to generate a unique filename");
+  lua_pushstring(L, buff);
+  return 1;
+}
+
+
+static int os_getenv (lua_State *L) {
+  lua_pushstring(L, getenv(luaL_checkstring(L, 1)));  /* if NULL push nil */
+  return 1;
+}
+
+
+static int os_clock (lua_State *L) {
+  lua_pushnumber(L, ((lua_Number)clock())/(lua_Number)CLOCKS_PER_SEC);
+  return 1;
+}
+
+
+/*
+** {======================================================
+** Time/Date operations
+** { year=%Y, month=%m, day=%d, hour=%H, min=%M, sec=%S,
+**   wday=%w+1, yday=%j, isdst=? }
+** =======================================================
+*/
+
+/*
+** About the overflow check: an overflow cannot occur when time
+** is represented by a lua_Integer, because either lua_Integer is
+** large enough to represent all int fields or it is not large enough
+** to represent a time that cause a field to overflow.  However, if
+** times are represented as doubles and lua_Integer is int, then the
+** time 0x1.e1853b0d184f6p+55 would cause an overflow when adding 1900
+** to compute the year.
+*/
+static void setfield (lua_State *L, const char *key, int value, int delta) {
+  #if (defined(LUA_NUMTIME) && LUA_MAXINTEGER <= INT_MAX)
+    if (l_unlikely(value > LUA_MAXINTEGER - delta))
+      luaL_error(L, "field '%s' is out-of-bound", key);
+  #endif
+  lua_pushinteger(L, (lua_Integer)value + delta);
+  lua_setfield(L, -2, key);
+}
+
+
+static void setboolfield (lua_State *L, const char *key, int value) {
+  if (value < 0)  /* undefined? */
+    return;  /* does not set field */
+  lua_pushboolean(L, value);
+  lua_setfield(L, -2, key);
+}
+
+
+/*
+** Set all fields from structure 'tm' in the table on top of the stack
+*/
+static void setallfields (lua_State *L, struct tm *stm) {
+  setfield(L, "year", stm->tm_year, 1900);
+  setfield(L, "month", stm->tm_mon, 1);
+  setfield(L, "day", stm->tm_mday, 0);
+  setfield(L, "hour", stm->tm_hour, 0);
+  setfield(L, "min", stm->tm_min, 0);
+  setfield(L, "sec", stm->tm_sec, 0);
+  setfield(L, "yday", stm->tm_yday, 1);
+  setfield(L, "wday", stm->tm_wday, 1);
+  setboolfield(L, "isdst", stm->tm_isdst);
+}
+
+
+static int getboolfield (lua_State *L, const char *key) {
+  int res;
+  res = (lua_getfield(L, -1, key) == LUA_TNIL) ? -1 : lua_toboolean(L, -1);
+  lua_pop(L, 1);
+  return res;
+}
+
+
+static int getfield (lua_State *L, const char *key, int d, int delta) {
+  int isnum;
+  int t = lua_getfield(L, -1, key);  /* get field and its type */
+  lua_Integer res = lua_tointegerx(L, -1, &isnum);
+  if (!isnum) {  /* field is not an integer? */
+    if (l_unlikely(t != LUA_TNIL))  /* some other value? */
+      return luaL_error(L, "field '%s' is not an integer", key);
+    else if (l_unlikely(d < 0))  /* absent field; no default? */
+      return luaL_error(L, "field '%s' missing in date table", key);
+    res = d;
+  }
+  else {
+    if (!(res >= 0 ? res - delta <= INT_MAX : INT_MIN + delta <= res))
+      return luaL_error(L, "field '%s' is out-of-bound", key);
+    res -= delta;
+  }
+  lua_pop(L, 1);
+  return (int)res;
+}
+
+
+static const char *checkoption (lua_State *L, const char *conv,
+                                ptrdiff_t convlen, char *buff) {
+  const char *option = LUA_STRFTIMEOPTIONS;
+  int oplen = 1;  /* length of options being checked */
+  for (; *option != '\0' && oplen <= convlen; option += oplen) {
+    if (*option == '|')  /* next block? */
+      oplen++;  /* will check options with next length (+1) */
+    else if (memcmp(conv, option, oplen) == 0) {  /* match? */
+      memcpy(buff, conv, oplen);  /* copy valid option to buffer */
+      buff[oplen] = '\0';
+      return conv + oplen;  /* return next item */
+    }
+  }
+  luaL_argerror(L, 1,
+    lua_pushfstring(L, "invalid conversion specifier '%%%s'", conv));
+  return conv;  /* to avoid warnings */
+}
+
+
+static time_t l_checktime (lua_State *L, int arg) {
+  l_timet t = l_gettime(L, arg);
+  luaL_argcheck(L, (time_t)t == t, arg, "time out-of-bounds");
+  return (time_t)t;
+}
+
+
+/* maximum size for an individual 'strftime' item */
+#define SIZETIMEFMT	250
+
+
+static int os_date (lua_State *L) {
+  size_t slen;
+  const char *s = luaL_optlstring(L, 1, "%c", &slen);
+  time_t t = luaL_opt(L, l_checktime, 2, time(NULL));
+  const char *se = s + slen;  /* 's' end */
+  struct tm tmr, *stm;
+  if (*s == '!') {  /* UTC? */
+    stm = l_gmtime(&t, &tmr);
+    s++;  /* skip '!' */
+  }
+  else
+    stm = l_localtime(&t, &tmr);
+  if (stm == NULL)  /* invalid date? */
+    return luaL_error(L,
+                 "date result cannot be represented in this installation");
+  if (strcmp(s, "*t") == 0) {
+    lua_createtable(L, 0, 9);  /* 9 = number of fields */
+    setallfields(L, stm);
+  }
+  else {
+    char cc[4];  /* buffer for individual conversion specifiers */
+    luaL_Buffer b;
+    cc[0] = '%';
+    luaL_buffinit(L, &b);
+    while (s < se) {
+      if (*s != '%')  /* not a conversion specifier? */
+        luaL_addchar(&b, *s++);
+      else {
+        size_t reslen;
+        char *buff = luaL_prepbuffsize(&b, SIZETIMEFMT);
+        s++;  /* skip '%' */
+        s = checkoption(L, s, se - s, cc + 1);  /* copy specifier to 'cc' */
+        reslen = strftime(buff, SIZETIMEFMT, cc, stm);
+        luaL_addsize(&b, reslen);
+      }
+    }
+    luaL_pushresult(&b);
+  }
+  return 1;
+}
+
+
+static int os_time (lua_State *L) {
+  time_t t;
+  if (lua_isnoneornil(L, 1))  /* called without args? */
+    t = time(NULL);  /* get current time */
+  else {
+    struct tm ts;
+    luaL_checktype(L, 1, LUA_TTABLE);
+    lua_settop(L, 1);  /* make sure table is at the top */
+    ts.tm_year = getfield(L, "year", -1, 1900);
+    ts.tm_mon = getfield(L, "month", -1, 1);
+    ts.tm_mday = getfield(L, "day", -1, 0);
+    ts.tm_hour = getfield(L, "hour", 12, 0);
+    ts.tm_min = getfield(L, "min", 0, 0);
+    ts.tm_sec = getfield(L, "sec", 0, 0);
+    ts.tm_isdst = getboolfield(L, "isdst");
+    t = mktime(&ts);
+    setallfields(L, &ts);  /* update fields with normalized values */
+  }
+  if (t != (time_t)(l_timet)t || t == (time_t)(-1))
+    return luaL_error(L,
+                  "time result cannot be represented in this installation");
+  l_pushtime(L, t);
+  return 1;
+}
+
+
+static int os_difftime (lua_State *L) {
+  time_t t1 = l_checktime(L, 1);
+  time_t t2 = l_checktime(L, 2);
+  lua_pushnumber(L, (lua_Number)difftime(t1, t2));
+  return 1;
+}
+
+/* }====================================================== */
+
+
+static int os_setlocale (lua_State *L) {
+  static const int cat[] = {LC_ALL, LC_COLLATE, LC_CTYPE, LC_MONETARY,
+                      LC_NUMERIC, LC_TIME};
+  static const char *const catnames[] = {"all", "collate", "ctype", "monetary",
+     "numeric", "time", NULL};
+  const char *l = luaL_optstring(L, 1, NULL);
+  int op = luaL_checkoption(L, 2, "all", catnames);
+  lua_pushstring(L, setlocale(cat[op], l));
+  return 1;
+}
+
+
+static int os_exit (lua_State *L) {
+  int status;
+  if (lua_isboolean(L, 1))
+    status = (lua_toboolean(L, 1) ? EXIT_SUCCESS : EXIT_FAILURE);
+  else
+    status = (int)luaL_optinteger(L, 1, EXIT_SUCCESS);
+  if (lua_toboolean(L, 2))
+    lua_close(L);
+  if (L) exit(status);  /* 'if' to avoid warnings for unreachable 'return' */
+  return 0;
+}
+
+
+static const luaL_Reg syslib[] = {
+  {"clock",     os_clock},
+  {"date",      os_date},
+  {"difftime",  os_difftime},
+  {"execute",   os_execute},
+  {"exit",      os_exit},
+  {"getenv",    os_getenv},
+  {"remove",    os_remove},
+  {"rename",    os_rename},
+  {"setlocale", os_setlocale},
+  {"time",      os_time},
+  {"tmpname",   os_tmpname},
+  {NULL, NULL}
+};
+
+/* }====================================================== */
+
+
+
+LUAMOD_API int luaopen_os (lua_State *L) {
+  luaL_newlib(L, syslib);
+  return 1;
+}
+
@@ -0,0 +1,171 @@
+/*
+** $Id: lparser.h $
+** Lua Parser
+** See Copyright Notice in lua.h
+*/
+
+#ifndef lparser_h
+#define lparser_h
+
+#include "llimits.h"
+#include "lobject.h"
+#include "lzio.h"
+
+
+/*
+** Expression and variable descriptor.
+** Code generation for variables and expressions can be delayed to allow
+** optimizations; An 'expdesc' structure describes a potentially-delayed
+** variable/expression. It has a description of its "main" value plus a
+** list of conditional jumps that can also produce its value (generated
+** by short-circuit operators 'and'/'or').
+*/
+
+/* kinds of variables/expressions */
+typedef enum {
+  VVOID,  /* when 'expdesc' describes the last expression of a list,
+             this kind means an empty list (so, no expression) */
+  VNIL,  /* constant nil */
+  VTRUE,  /* constant true */
+  VFALSE,  /* constant false */
+  VK,  /* constant in 'k'; info = index of constant in 'k' */
+  VKFLT,  /* floating constant; nval = numerical float value */
+  VKINT,  /* integer constant; ival = numerical integer value */
+  VKSTR,  /* string constant; strval = TString address;
+             (string is fixed by the lexer) */
+  VNONRELOC,  /* expression has its value in a fixed register;
+                 info = result register */
+  VLOCAL,  /* local variable; var.ridx = register index;
+              var.vidx = relative index in 'actvar.arr'  */
+  VUPVAL,  /* upvalue variable; info = index of upvalue in 'upvalues' */
+  VCONST,  /* compile-time <const> variable;
+              info = absolute index in 'actvar.arr'  */
+  VINDEXED,  /* indexed variable;
+                ind.t = table register;
+                ind.idx = key's R index */
+  VINDEXUP,  /* indexed upvalue;
+                ind.t = table upvalue;
+                ind.idx = key's K index */
+  VINDEXI, /* indexed variable with constant integer;
+                ind.t = table register;
+                ind.idx = key's value */
+  VINDEXSTR, /* indexed variable with literal string;
+                ind.t = table register;
+                ind.idx = key's K index */
+  VJMP,  /* expression is a test/comparison;
+            info = pc of corresponding jump instruction */
+  VRELOC,  /* expression can put result in any register;
+              info = instruction pc */
+  VCALL,  /* expression is a function call; info = instruction pc */
+  VVARARG  /* vararg expression; info = instruction pc */
+} expkind;
+
+
+#define vkisvar(k)	(VLOCAL <= (k) && (k) <= VINDEXSTR)
+#define vkisindexed(k)	(VINDEXED <= (k) && (k) <= VINDEXSTR)
+
+
+typedef struct expdesc {
+  expkind k;
+  union {
+    lua_Integer ival;    /* for VKINT */
+    lua_Number nval;  /* for VKFLT */
+    TString *strval;  /* for VKSTR */
+    int info;  /* for generic use */
+    struct {  /* for indexed variables */
+      short idx;  /* index (R or "long" K) */
+      lu_byte t;  /* table (register or upvalue) */
+    } ind;
+    struct {  /* for local variables */
+      lu_byte ridx;  /* register holding the variable */
+      unsigned short vidx;  /* compiler index (in 'actvar.arr')  */
+    } var;
+  } u;
+  int t;  /* patch list of 'exit when true' */
+  int f;  /* patch list of 'exit when false' */
+} expdesc;
+
+
+/* kinds of variables */
+#define VDKREG		0   /* regular */
+#define RDKCONST	1   /* constant */
+#define RDKTOCLOSE	2   /* to-be-closed */
+#define RDKCTC		3   /* compile-time constant */
+
+/* description of an active local variable */
+typedef union Vardesc {
+  struct {
+    TValuefields;  /* constant value (if it is a compile-time constant) */
+    lu_byte kind;
+    lu_byte ridx;  /* register holding the variable */
+    short pidx;  /* index of the variable in the Proto's 'locvars' array */
+    TString *name;  /* variable name */
+  } vd;
+  TValue k;  /* constant value (if any) */
+} Vardesc;
+
+
+
+/* description of pending goto statements and label statements */
+typedef struct Labeldesc {
+  TString *name;  /* label identifier */
+  int pc;  /* position in code */
+  int line;  /* line where it appeared */
+  lu_byte nactvar;  /* number of active variables in that position */
+  lu_byte close;  /* goto that escapes upvalues */
+} Labeldesc;
+
+
+/* list of labels or gotos */
+typedef struct Labellist {
+  Labeldesc *arr;  /* array */
+  int n;  /* number of entries in use */
+  int size;  /* array size */
+} Labellist;
+
+
+/* dynamic structures used by the parser */
+typedef struct Dyndata {
+  struct {  /* list of all active local variables */
+    Vardesc *arr;
+    int n;
+    int size;
+  } actvar;
+  Labellist gt;  /* list of pending gotos */
+  Labellist label;   /* list of active labels */
+} Dyndata;
+
+
+/* control of blocks */
+struct BlockCnt;  /* defined in lparser.c */
+
+
+/* state needed to generate code for a given function */
+typedef struct FuncState {
+  Proto *f;  /* current function header */
+  struct FuncState *prev;  /* enclosing function */
+  struct LexState *ls;  /* lexical state */
+  struct BlockCnt *bl;  /* chain of current blocks */
+  int pc;  /* next position to code (equivalent to 'ncode') */
+  int lasttarget;   /* 'label' of last 'jump label' */
+  int previousline;  /* last line that was saved in 'lineinfo' */
+  int nk;  /* number of elements in 'k' */
+  int np;  /* number of elements in 'p' */
+  int nabslineinfo;  /* number of elements in 'abslineinfo' */
+  int firstlocal;  /* index of first local var (in Dyndata array) */
+  int firstlabel;  /* index of first label (in 'dyd->label->arr') */
+  short ndebugvars;  /* number of elements in 'f->locvars' */
+  lu_byte nactvar;  /* number of active local variables */
+  lu_byte nups;  /* number of upvalues */
+  lu_byte freereg;  /* first free register */
+  lu_byte iwthabs;  /* instructions issued since last absolute line info */
+  lu_byte needclose;  /* function needs to close upvalues when returning */
+} FuncState;
+
+
+LUAI_FUNC int luaY_nvarstack (FuncState *fs);
+LUAI_FUNC LClosure *luaY_parser (lua_State *L, ZIO *z, Mbuffer *buff,
+                                 Dyndata *dyd, const char *name, int firstchar);
+
+
+#endif
@@ -0,0 +1,45 @@
+/*
+** $Id: lprefix.h $
+** Definitions for Lua code that must come before any other header file
+** See Copyright Notice in lua.h
+*/
+
+#ifndef lprefix_h
+#define lprefix_h
+
+
+/*
+** Allows POSIX/XSI stuff
+*/
+#if !defined(LUA_USE_C89)	/* { */
+
+#if !defined(_XOPEN_SOURCE)
+#define _XOPEN_SOURCE           600
+#elif _XOPEN_SOURCE == 0
+#undef _XOPEN_SOURCE  /* use -D_XOPEN_SOURCE=0 to undefine it */
+#endif
+
+/*
+** Allows manipulation of large files in gcc and some other compilers
+*/
+#if !defined(LUA_32BITS) && !defined(_FILE_OFFSET_BITS)
+#define _LARGEFILE_SOURCE       1
+#define _FILE_OFFSET_BITS       64
+#endif
+
+#endif				/* } */
+
+
+/*
+** Windows stuff
+*/
+#if defined(_WIN32)	/* { */
+
+#if !defined(_CRT_SECURE_NO_WARNINGS)
+#define _CRT_SECURE_NO_WARNINGS  /* avoid warnings about ISO C functions */
+#endif
+
+#endif			/* } */
+
+#endif
+
@@ -0,0 +1,445 @@
+/*
+** $Id: lstate.c $
+** Global State
+** See Copyright Notice in lua.h
+*/
+
+#define lstate_c
+#define LUA_CORE
+
+#include "lprefix.h"
+
+
+#include <stddef.h>
+#include <string.h>
+
+#include "lua.h"
+
+#include "lapi.h"
+#include "ldebug.h"
+#include "ldo.h"
+#include "lfunc.h"
+#include "lgc.h"
+#include "llex.h"
+#include "lmem.h"
+#include "lstate.h"
+#include "lstring.h"
+#include "ltable.h"
+#include "ltm.h"
+
+
+
+/*
+** thread state + extra space
+*/
+typedef struct LX {
+  lu_byte extra_[LUA_EXTRASPACE];
+  lua_State l;
+} LX;
+
+
+/*
+** Main thread combines a thread state and the global state
+*/
+typedef struct LG {
+  LX l;
+  global_State g;
+} LG;
+
+
+
+#define fromstate(L)	(cast(LX *, cast(lu_byte *, (L)) - offsetof(LX, l)))
+
+
+/*
+** A macro to create a "random" seed when a state is created;
+** the seed is used to randomize string hashes.
+*/
+#if !defined(luai_makeseed)
+
+#include <time.h>
+
+/*
+** Compute an initial seed with some level of randomness.
+** Rely on Address Space Layout Randomization (if present) and
+** current time.
+*/
+#define addbuff(b,p,e) \
+  { size_t t = cast_sizet(e); \
+    memcpy(b + p, &t, sizeof(t)); p += sizeof(t); }
+
+static unsigned int luai_makeseed (lua_State *L) {
+  char buff[3 * sizeof(size_t)];
+  unsigned int h = cast_uint(time(NULL));
+  int p = 0;
+  addbuff(buff, p, L);  /* heap variable */
+  addbuff(buff, p, &h);  /* local variable */
+  addbuff(buff, p, &lua_newstate);  /* public function */
+  lua_assert(p == sizeof(buff));
+  return luaS_hash(buff, p, h);
+}
+
+#endif
+
+
+/*
+** set GCdebt to a new value keeping the value (totalbytes + GCdebt)
+** invariant (and avoiding underflows in 'totalbytes')
+*/
+void luaE_setdebt (global_State *g, l_mem debt) {
+  l_mem tb = gettotalbytes(g);
+  lua_assert(tb > 0);
+  if (debt < tb - MAX_LMEM)
+    debt = tb - MAX_LMEM;  /* will make 'totalbytes == MAX_LMEM' */
+  g->totalbytes = tb - debt;
+  g->GCdebt = debt;
+}
+
+
+LUA_API int lua_setcstacklimit (lua_State *L, unsigned int limit) {
+  UNUSED(L); UNUSED(limit);
+  return LUAI_MAXCCALLS;  /* warning?? */
+}
+
+
+CallInfo *luaE_extendCI (lua_State *L) {
+  CallInfo *ci;
+  lua_assert(L->ci->next == NULL);
+  ci = luaM_new(L, CallInfo);
+  lua_assert(L->ci->next == NULL);
+  L->ci->next = ci;
+  ci->previous = L->ci;
+  ci->next = NULL;
+  ci->u.l.trap = 0;
+  L->nci++;
+  return ci;
+}
+
+
+/*
+** free all CallInfo structures not in use by a thread
+*/
+static void freeCI (lua_State *L) {
+  CallInfo *ci = L->ci;
+  CallInfo *next = ci->next;
+  ci->next = NULL;
+  while ((ci = next) != NULL) {
+    next = ci->next;
+    luaM_free(L, ci);
+    L->nci--;
+  }
+}
+
+
+/*
+** free half of the CallInfo structures not in use by a thread,
+** keeping the first one.
+*/
+void luaE_shrinkCI (lua_State *L) {
+  CallInfo *ci = L->ci->next;  /* first free CallInfo */
+  CallInfo *next;
+  if (ci == NULL)
+    return;  /* no extra elements */
+  while ((next = ci->next) != NULL) {  /* two extra elements? */
+    CallInfo *next2 = next->next;  /* next's next */
+    ci->next = next2;  /* remove next from the list */
+    L->nci--;
+    luaM_free(L, next);  /* free next */
+    if (next2 == NULL)
+      break;  /* no more elements */
+    else {
+      next2->previous = ci;
+      ci = next2;  /* continue */
+    }
+  }
+}
+
+
+/*
+** Called when 'getCcalls(L)' larger or equal to LUAI_MAXCCALLS.
+** If equal, raises an overflow error. If value is larger than
+** LUAI_MAXCCALLS (which means it is handling an overflow) but
+** not much larger, does not report an error (to allow overflow
+** handling to work).
+*/
+void luaE_checkcstack (lua_State *L) {
+  if (getCcalls(L) == LUAI_MAXCCALLS)
+    luaG_runerror(L, "C stack overflow");
+  else if (getCcalls(L) >= (LUAI_MAXCCALLS / 10 * 11))
+    luaD_throw(L, LUA_ERRERR);  /* error while handling stack error */
+}
+
+
+LUAI_FUNC void luaE_incCstack (lua_State *L) {
+  L->nCcalls++;
+  if (l_unlikely(getCcalls(L) >= LUAI_MAXCCALLS))
+    luaE_checkcstack(L);
+}
+
+
+static void stack_init (lua_State *L1, lua_State *L) {
+  int i; CallInfo *ci;
+  /* initialize stack array */
+  L1->stack.p = luaM_newvector(L, BASIC_STACK_SIZE + EXTRA_STACK, StackValue);
+  L1->tbclist.p = L1->stack.p;
+  for (i = 0; i < BASIC_STACK_SIZE + EXTRA_STACK; i++)
+    setnilvalue(s2v(L1->stack.p + i));  /* erase new stack */
+  L1->top.p = L1->stack.p;
+  L1->stack_last.p = L1->stack.p + BASIC_STACK_SIZE;
+  /* initialize first ci */
+  ci = &L1->base_ci;
+  ci->next = ci->previous = NULL;
+  ci->callstatus = CIST_C;
+  ci->func.p = L1->top.p;
+  ci->u.c.k = NULL;
+  ci->nresults = 0;
+  setnilvalue(s2v(L1->top.p));  /* 'function' entry for this 'ci' */
+  L1->top.p++;
+  ci->top.p = L1->top.p + LUA_MINSTACK;
+  L1->ci = ci;
+}
+
+
+static void freestack (lua_State *L) {
+  if (L->stack.p == NULL)
+    return;  /* stack not completely built yet */
+  L->ci = &L->base_ci;  /* free the entire 'ci' list */
+  freeCI(L);
+  lua_assert(L->nci == 0);
+  luaM_freearray(L, L->stack.p, stacksize(L) + EXTRA_STACK);  /* free stack */
+}
+
+
+/*
+** Create registry table and its predefined values
+*/
+static void init_registry (lua_State *L, global_State *g) {
+  /* create registry */
+  Table *registry = luaH_new(L);
+  sethvalue(L, &g->l_registry, registry);
+  luaH_resize(L, registry, LUA_RIDX_LAST, 0);
+  /* registry[LUA_RIDX_MAINTHREAD] = L */
+  setthvalue(L, &registry->array[LUA_RIDX_MAINTHREAD - 1], L);
+  /* registry[LUA_RIDX_GLOBALS] = new table (table of globals) */
+  sethvalue(L, &registry->array[LUA_RIDX_GLOBALS - 1], luaH_new(L));
+}
+
+
+/*
+** open parts of the state that may cause memory-allocation errors.
+*/
+static void f_luaopen (lua_State *L, void *ud) {
+  global_State *g = G(L);
+  UNUSED(ud);
+  stack_init(L, L);  /* init stack */
+  init_registry(L, g);
+  luaS_init(L);
+  luaT_init(L);
+  luaX_init(L);
+  g->gcstp = 0;  /* allow gc */
+  setnilvalue(&g->nilvalue);  /* now state is complete */
+  luai_userstateopen(L);
+}
+
+
+/*
+** preinitialize a thread with consistent values without allocating
+** any memory (to avoid errors)
+*/
+static void preinit_thread (lua_State *L, global_State *g) {
+  G(L) = g;
+  L->stack.p = NULL;
+  L->ci = NULL;
+  L->nci = 0;
+  L->twups = L;  /* thread has no upvalues */
+  L->nCcalls = 0;
+  L->errorJmp = NULL;
+  L->hook = NULL;
+  L->hookmask = 0;
+  L->basehookcount = 0;
+  L->allowhook = 1;
+  resethookcount(L);
+  L->openupval = NULL;
+  L->status = LUA_OK;
+  L->errfunc = 0;
+  L->oldpc = 0;
+}
+
+
+static void close_state (lua_State *L) {
+  global_State *g = G(L);
+  if (!completestate(g))  /* closing a partially built state? */
+    luaC_freeallobjects(L);  /* just collect its objects */
+  else {  /* closing a fully built state */
+    L->ci = &L->base_ci;  /* unwind CallInfo list */
+    luaD_closeprotected(L, 1, LUA_OK);  /* close all upvalues */
+    luaC_freeallobjects(L);  /* collect all objects */
+    luai_userstateclose(L);
+  }
+  luaM_freearray(L, G(L)->strt.hash, G(L)->strt.size);
+  freestack(L);
+  lua_assert(gettotalbytes(g) == sizeof(LG));
+  (*g->frealloc)(g->ud, fromstate(L), sizeof(LG), 0);  /* free main block */
+}
+
+
+LUA_API lua_State *lua_newthread (lua_State *L) {
+  global_State *g = G(L);
+  GCObject *o;
+  lua_State *L1;
+  lua_lock(L);
+  luaC_checkGC(L);
+  /* create new thread */
+  o = luaC_newobjdt(L, LUA_TTHREAD, sizeof(LX), offsetof(LX, l));
+  L1 = gco2th(o);
+  /* anchor it on L stack */
+  setthvalue2s(L, L->top.p, L1);
+  api_incr_top(L);
+  preinit_thread(L1, g);
+  L1->hookmask = L->hookmask;
+  L1->basehookcount = L->basehookcount;
+  L1->hook = L->hook;
+  resethookcount(L1);
+  /* initialize L1 extra space */
+  memcpy(lua_getextraspace(L1), lua_getextraspace(g->mainthread),
+         LUA_EXTRASPACE);
+  luai_userstatethread(L, L1);
+  stack_init(L1, L);  /* init stack */
+  lua_unlock(L);
+  return L1;
+}
+
+
+void luaE_freethread (lua_State *L, lua_State *L1) {
+  LX *l = fromstate(L1);
+  luaF_closeupval(L1, L1->stack.p);  /* close all upvalues */
+  lua_assert(L1->openupval == NULL);
+  luai_userstatefree(L, L1);
+  freestack(L1);
+  luaM_free(L, l);
+}
+
+
+int luaE_resetthread (lua_State *L, int status) {
+  CallInfo *ci = L->ci = &L->base_ci;  /* unwind CallInfo list */
+  setnilvalue(s2v(L->stack.p));  /* 'function' entry for basic 'ci' */
+  ci->func.p = L->stack.p;
+  ci->callstatus = CIST_C;
+  if (status == LUA_YIELD)
+    status = LUA_OK;
+  L->status = LUA_OK;  /* so it can run __close metamethods */
+  status = luaD_closeprotected(L, 1, status);
+  if (status != LUA_OK)  /* errors? */
+    luaD_seterrorobj(L, status, L->stack.p + 1);
+  else
+    L->top.p = L->stack.p + 1;
+  ci->top.p = L->top.p + LUA_MINSTACK;
+  luaD_reallocstack(L, cast_int(ci->top.p - L->stack.p), 0);
+  return status;
+}
+
+
+LUA_API int lua_closethread (lua_State *L, lua_State *from) {
+  int status;
+  lua_lock(L);
+  L->nCcalls = (from) ? getCcalls(from) : 0;
+  status = luaE_resetthread(L, L->status);
+  lua_unlock(L);
+  return status;
+}
+
+
+/*
+** Deprecated! Use 'lua_closethread' instead.
+*/
+LUA_API int lua_resetthread (lua_State *L) {
+  return lua_closethread(L, NULL);
+}
+
+
+LUA_API lua_State *lua_newstate (lua_Alloc f, void *ud) {
+  int i;
+  lua_State *L;
+  global_State *g;
+  LG *l = cast(LG *, (*f)(ud, NULL, LUA_TTHREAD, sizeof(LG)));
+  if (l == NULL) return NULL;
+  L = &l->l.l;
+  g = &l->g;
+  L->tt = LUA_VTHREAD;
+  g->currentwhite = bitmask(WHITE0BIT);
+  L->marked = luaC_white(g);
+  preinit_thread(L, g);
+  g->allgc = obj2gco(L);  /* by now, only object is the main thread */
+  L->next = NULL;
+  incnny(L);  /* main thread is always non yieldable */
+  g->frealloc = f;
+  g->ud = ud;
+  g->warnf = NULL;
+  g->ud_warn = NULL;
+  g->mainthread = L;
+  g->seed = luai_makeseed(L);
+  g->gcstp = GCSTPGC;  /* no GC while building state */
+  g->strt.size = g->strt.nuse = 0;
+  g->strt.hash = NULL;
+  setnilvalue(&g->l_registry);
+  g->panic = NULL;
+  g->gcstate = GCSpause;
+  g->gckind = KGC_INC;
+  g->gcstopem = 0;
+  g->gcemergency = 0;
+  g->finobj = g->tobefnz = g->fixedgc = NULL;
+  g->firstold1 = g->survival = g->old1 = g->reallyold = NULL;
+  g->finobjsur = g->finobjold1 = g->finobjrold = NULL;
+  g->sweepgc = NULL;
+  g->gray = g->grayagain = NULL;
+  g->weak = g->ephemeron = g->allweak = NULL;
+  g->twups = NULL;
+  g->totalbytes = sizeof(LG);
+  g->GCdebt = 0;
+  g->lastatomic = 0;
+  setivalue(&g->nilvalue, 0);  /* to signal that state is not yet built */
+  setgcparam(g->gcpause, LUAI_GCPAUSE);
+  setgcparam(g->gcstepmul, LUAI_GCMUL);
+  g->gcstepsize = LUAI_GCSTEPSIZE;
+  setgcparam(g->genmajormul, LUAI_GENMAJORMUL);
+  g->genminormul = LUAI_GENMINORMUL;
+  for (i=0; i < LUA_NUMTAGS; i++) g->mt[i] = NULL;
+  if (luaD_rawrunprotected(L, f_luaopen, NULL) != LUA_OK) {
+    /* memory allocation error: free partial state */
+    close_state(L);
+    L = NULL;
+  }
+  return L;
+}
+
+
+LUA_API void lua_close (lua_State *L) {
+  lua_lock(L);
+  L = G(L)->mainthread;  /* only the main thread can be closed */
+  close_state(L);
+}
+
+
+void luaE_warning (lua_State *L, const char *msg, int tocont) {
+  lua_WarnFunction wf = G(L)->warnf;
+  if (wf != NULL)
+    wf(G(L)->ud_warn, msg, tocont);
+}
+
+
+/*
+** Generate a warning from an error message
+*/
+void luaE_warnerror (lua_State *L, const char *where) {
+  TValue *errobj = s2v(L->top.p - 1);  /* error object */
+  const char *msg = (ttisstring(errobj))
+                  ? getstr(tsvalue(errobj))
+                  : "error object is not a string";
+  /* produce warning "error in %s (%s)" (where, msg) */
+  luaE_warning(L, "error in ", 1);
+  luaE_warning(L, where, 1);
+  luaE_warning(L, " (", 1);
+  luaE_warning(L, msg, 1);
+  luaE_warning(L, ")", 0);
+}
+
@@ -0,0 +1,408 @@
+/*
+** $Id: lstate.h $
+** Global State
+** See Copyright Notice in lua.h
+*/
+
+#ifndef lstate_h
+#define lstate_h
+
+#include "lua.h"
+
+
+/* Some header files included here need this definition */
+typedef struct CallInfo CallInfo;
+
+
+#include "lobject.h"
+#include "ltm.h"
+#include "lzio.h"
+
+
+/*
+** Some notes about garbage-collected objects: All objects in Lua must
+** be kept somehow accessible until being freed, so all objects always
+** belong to one (and only one) of these lists, using field 'next' of
+** the 'CommonHeader' for the link:
+**
+** 'allgc': all objects not marked for finalization;
+** 'finobj': all objects marked for finalization;
+** 'tobefnz': all objects ready to be finalized;
+** 'fixedgc': all objects that are not to be collected (currently
+** only small strings, such as reserved words).
+**
+** For the generational collector, some of these lists have marks for
+** generations. Each mark points to the first element in the list for
+** that particular generation; that generation goes until the next mark.
+**
+** 'allgc' -> 'survival': new objects;
+** 'survival' -> 'old': objects that survived one collection;
+** 'old1' -> 'reallyold': objects that became old in last collection;
+** 'reallyold' -> NULL: objects old for more than one cycle.
+**
+** 'finobj' -> 'finobjsur': new objects marked for finalization;
+** 'finobjsur' -> 'finobjold1': survived   """";
+** 'finobjold1' -> 'finobjrold': just old  """";
+** 'finobjrold' -> NULL: really old       """".
+**
+** All lists can contain elements older than their main ages, due
+** to 'luaC_checkfinalizer' and 'udata2finalize', which move
+** objects between the normal lists and the "marked for finalization"
+** lists. Moreover, barriers can age young objects in young lists as
+** OLD0, which then become OLD1. However, a list never contains
+** elements younger than their main ages.
+**
+** The generational collector also uses a pointer 'firstold1', which
+** points to the first OLD1 object in the list. It is used to optimize
+** 'markold'. (Potentially OLD1 objects can be anywhere between 'allgc'
+** and 'reallyold', but often the list has no OLD1 objects or they are
+** after 'old1'.) Note the difference between it and 'old1':
+** 'firstold1': no OLD1 objects before this point; there can be all
+**   ages after it.
+** 'old1': no objects younger than OLD1 after this point.
+*/
+
+/*
+** Moreover, there is another set of lists that control gray objects.
+** These lists are linked by fields 'gclist'. (All objects that
+** can become gray have such a field. The field is not the same
+** in all objects, but it always has this name.)  Any gray object
+** must belong to one of these lists, and all objects in these lists
+** must be gray (with two exceptions explained below):
+**
+** 'gray': regular gray objects, still waiting to be visited.
+** 'grayagain': objects that must be revisited at the atomic phase.
+**   That includes
+**   - black objects got in a write barrier;
+**   - all kinds of weak tables during propagation phase;
+**   - all threads.
+** 'weak': tables with weak values to be cleared;
+** 'ephemeron': ephemeron tables with white->white entries;
+** 'allweak': tables with weak keys and/or weak values to be cleared.
+**
+** The exceptions to that "gray rule" are:
+** - TOUCHED2 objects in generational mode stay in a gray list (because
+** they must be visited again at the end of the cycle), but they are
+** marked black because assignments to them must activate barriers (to
+** move them back to TOUCHED1).
+** - Open upvales are kept gray to avoid barriers, but they stay out
+** of gray lists. (They don't even have a 'gclist' field.)
+*/
+
+
+
+/*
+** About 'nCcalls':  This count has two parts: the lower 16 bits counts
+** the number of recursive invocations in the C stack; the higher
+** 16 bits counts the number of non-yieldable calls in the stack.
+** (They are together so that we can change and save both with one
+** instruction.)
+*/
+
+
+/* true if this thread does not have non-yieldable calls in the stack */
+#define yieldable(L)		(((L)->nCcalls & 0xffff0000) == 0)
+
+/* real number of C calls */
+#define getCcalls(L)	((L)->nCcalls & 0xffff)
+
+
+/* Increment the number of non-yieldable calls */
+#define incnny(L)	((L)->nCcalls += 0x10000)
+
+/* Decrement the number of non-yieldable calls */
+#define decnny(L)	((L)->nCcalls -= 0x10000)
+
+/* Non-yieldable call increment */
+#define nyci	(0x10000 | 1)
+
+
+
+
+struct lua_longjmp;  /* defined in ldo.c */
+
+
+/*
+** Atomic type (relative to signals) to better ensure that 'lua_sethook'
+** is thread safe
+*/
+#if !defined(l_signalT)
+#include <signal.h>
+#define l_signalT	sig_atomic_t
+#endif
+
+
+/*
+** Extra stack space to handle TM calls and some other extras. This
+** space is not included in 'stack_last'. It is used only to avoid stack
+** checks, either because the element will be promptly popped or because
+** there will be a stack check soon after the push. Function frames
+** never use this extra space, so it does not need to be kept clean.
+*/
+#define EXTRA_STACK   5
+
+
+#define BASIC_STACK_SIZE        (2*LUA_MINSTACK)
+
+#define stacksize(th)	cast_int((th)->stack_last.p - (th)->stack.p)
+
+
+/* kinds of Garbage Collection */
+#define KGC_INC		0	/* incremental gc */
+#define KGC_GEN		1	/* generational gc */
+
+
+typedef struct stringtable {
+  TString **hash;
+  int nuse;  /* number of elements */
+  int size;
+} stringtable;
+
+
+/*
+** Information about a call.
+** About union 'u':
+** - field 'l' is used only for Lua functions;
+** - field 'c' is used only for C functions.
+** About union 'u2':
+** - field 'funcidx' is used only by C functions while doing a
+** protected call;
+** - field 'nyield' is used only while a function is "doing" an
+** yield (from the yield until the next resume);
+** - field 'nres' is used only while closing tbc variables when
+** returning from a function;
+** - field 'transferinfo' is used only during call/returnhooks,
+** before the function starts or after it ends.
+*/
+struct CallInfo {
+  StkIdRel func;  /* function index in the stack */
+  StkIdRel	top;  /* top for this function */
+  struct CallInfo *previous, *next;  /* dynamic call link */
+  union {
+    struct {  /* only for Lua functions */
+      const Instruction *savedpc;
+      volatile l_signalT trap;  /* function is tracing lines/counts */
+      int nextraargs;  /* # of extra arguments in vararg functions */
+    } l;
+    struct {  /* only for C functions */
+      lua_KFunction k;  /* continuation in case of yields */
+      ptrdiff_t old_errfunc;
+      lua_KContext ctx;  /* context info. in case of yields */
+    } c;
+  } u;
+  union {
+    int funcidx;  /* called-function index */
+    int nyield;  /* number of values yielded */
+    int nres;  /* number of values returned */
+    struct {  /* info about transferred values (for call/return hooks) */
+      unsigned short ftransfer;  /* offset of first value transferred */
+      unsigned short ntransfer;  /* number of values transferred */
+    } transferinfo;
+  } u2;
+  short nresults;  /* expected number of results from this function */
+  unsigned short callstatus;
+};
+
+
+/*
+** Bits in CallInfo status
+*/
+#define CIST_OAH	(1<<0)	/* original value of 'allowhook' */
+#define CIST_C		(1<<1)	/* call is running a C function */
+#define CIST_FRESH	(1<<2)	/* call is on a fresh "luaV_execute" frame */
+#define CIST_HOOKED	(1<<3)	/* call is running a debug hook */
+#define CIST_YPCALL	(1<<4)	/* doing a yieldable protected call */
+#define CIST_TAIL	(1<<5)	/* call was tail called */
+#define CIST_HOOKYIELD	(1<<6)	/* last hook called yielded */
+#define CIST_FIN	(1<<7)	/* function "called" a finalizer */
+#define CIST_TRAN	(1<<8)	/* 'ci' has transfer information */
+#define CIST_CLSRET	(1<<9)  /* function is closing tbc variables */
+/* Bits 10-12 are used for CIST_RECST (see below) */
+#define CIST_RECST	10
+#if defined(LUA_COMPAT_LT_LE)
+#define CIST_LEQ	(1<<13)  /* using __lt for __le */
+#endif
+
+
+/*
+** Field CIST_RECST stores the "recover status", used to keep the error
+** status while closing to-be-closed variables in coroutines, so that
+** Lua can correctly resume after an yield from a __close method called
+** because of an error.  (Three bits are enough for error status.)
+*/
+#define getcistrecst(ci)     (((ci)->callstatus >> CIST_RECST) & 7)
+#define setcistrecst(ci,st)  \
+  check_exp(((st) & 7) == (st),   /* status must fit in three bits */  \
+            ((ci)->callstatus = ((ci)->callstatus & ~(7 << CIST_RECST))  \
+                                                  | ((st) << CIST_RECST)))
+
+
+/* active function is a Lua function */
+#define isLua(ci)	(!((ci)->callstatus & CIST_C))
+
+/* call is running Lua code (not a hook) */
+#define isLuacode(ci)	(!((ci)->callstatus & (CIST_C | CIST_HOOKED)))
+
+/* assume that CIST_OAH has offset 0 and that 'v' is strictly 0/1 */
+#define setoah(st,v)	((st) = ((st) & ~CIST_OAH) | (v))
+#define getoah(st)	((st) & CIST_OAH)
+
+
+/*
+** 'global state', shared by all threads of this state
+*/
+typedef struct global_State {
+  lua_Alloc frealloc;  /* function to reallocate memory */
+  void *ud;         /* auxiliary data to 'frealloc' */
+  l_mem totalbytes;  /* number of bytes currently allocated - GCdebt */
+  l_mem GCdebt;  /* bytes allocated not yet compensated by the collector */
+  lu_mem GCestimate;  /* an estimate of the non-garbage memory in use */
+  lu_mem lastatomic;  /* see function 'genstep' in file 'lgc.c' */
+  stringtable strt;  /* hash table for strings */
+  TValue l_registry;
+  TValue nilvalue;  /* a nil value */
+  unsigned int seed;  /* randomized seed for hashes */
+  lu_byte currentwhite;
+  lu_byte gcstate;  /* state of garbage collector */
+  lu_byte gckind;  /* kind of GC running */
+  lu_byte gcstopem;  /* stops emergency collections */
+  lu_byte genminormul;  /* control for minor generational collections */
+  lu_byte genmajormul;  /* control for major generational collections */
+  lu_byte gcstp;  /* control whether GC is running */
+  lu_byte gcemergency;  /* true if this is an emergency collection */
+  lu_byte gcpause;  /* size of pause between successive GCs */
+  lu_byte gcstepmul;  /* GC "speed" */
+  lu_byte gcstepsize;  /* (log2 of) GC granularity */
+  GCObject *allgc;  /* list of all collectable objects */
+  GCObject **sweepgc;  /* current position of sweep in list */
+  GCObject *finobj;  /* list of collectable objects with finalizers */
+  GCObject *gray;  /* list of gray objects */
+  GCObject *grayagain;  /* list of objects to be traversed atomically */
+  GCObject *weak;  /* list of tables with weak values */
+  GCObject *ephemeron;  /* list of ephemeron tables (weak keys) */
+  GCObject *allweak;  /* list of all-weak tables */
+  GCObject *tobefnz;  /* list of userdata to be GC */
+  GCObject *fixedgc;  /* list of objects not to be collected */
+  /* fields for generational collector */
+  GCObject *survival;  /* start of objects that survived one GC cycle */
+  GCObject *old1;  /* start of old1 objects */
+  GCObject *reallyold;  /* objects more than one cycle old ("really old") */
+  GCObject *firstold1;  /* first OLD1 object in the list (if any) */
+  GCObject *finobjsur;  /* list of survival objects with finalizers */
+  GCObject *finobjold1;  /* list of old1 objects with finalizers */
+  GCObject *finobjrold;  /* list of really old objects with finalizers */
+  struct lua_State *twups;  /* list of threads with open upvalues */
+  lua_CFunction panic;  /* to be called in unprotected errors */
+  struct lua_State *mainthread;
+  TString *memerrmsg;  /* message for memory-allocation errors */
+  TString *tmname[TM_N];  /* array with tag-method names */
+  struct Table *mt[LUA_NUMTYPES];  /* metatables for basic types */
+  TString *strcache[STRCACHE_N][STRCACHE_M];  /* cache for strings in API */
+  lua_WarnFunction warnf;  /* warning function */
+  void *ud_warn;         /* auxiliary data to 'warnf' */
+} global_State;
+
+
+/*
+** 'per thread' state
+*/
+struct lua_State {
+  CommonHeader;
+  lu_byte status;
+  lu_byte allowhook;
+  unsigned short nci;  /* number of items in 'ci' list */
+  StkIdRel top;  /* first free slot in the stack */
+  global_State *l_G;
+  CallInfo *ci;  /* call info for current function */
+  StkIdRel stack_last;  /* end of stack (last element + 1) */
+  StkIdRel stack;  /* stack base */
+  UpVal *openupval;  /* list of open upvalues in this stack */
+  StkIdRel tbclist;  /* list of to-be-closed variables */
+  GCObject *gclist;
+  struct lua_State *twups;  /* list of threads with open upvalues */
+  struct lua_longjmp *errorJmp;  /* current error recover point */
+  CallInfo base_ci;  /* CallInfo for first level (C calling Lua) */
+  volatile lua_Hook hook;
+  ptrdiff_t errfunc;  /* current error handling function (stack index) */
+  l_uint32 nCcalls;  /* number of nested (non-yieldable | C)  calls */
+  int oldpc;  /* last pc traced */
+  int basehookcount;
+  int hookcount;
+  volatile l_signalT hookmask;
+};
+
+
+#define G(L)	(L->l_G)
+
+/*
+** 'g->nilvalue' being a nil value flags that the state was completely
+** build.
+*/
+#define completestate(g)	ttisnil(&g->nilvalue)
+
+
+/*
+** Union of all collectable objects (only for conversions)
+** ISO C99, 6.5.2.3 p.5:
+** "if a union contains several structures that share a common initial
+** sequence [...], and if the union object currently contains one
+** of these structures, it is permitted to inspect the common initial
+** part of any of them anywhere that a declaration of the complete type
+** of the union is visible."
+*/
+union GCUnion {
+  GCObject gc;  /* common header */
+  struct TString ts;
+  struct Udata u;
+  union Closure cl;
+  struct Table h;
+  struct Proto p;
+  struct lua_State th;  /* thread */
+  struct UpVal upv;
+};
+
+
+/*
+** ISO C99, 6.7.2.1 p.14:
+** "A pointer to a union object, suitably converted, points to each of
+** its members [...], and vice versa."
+*/
+#define cast_u(o)	cast(union GCUnion *, (o))
+
+/* macros to convert a GCObject into a specific value */
+#define gco2ts(o)  \
+	check_exp(novariant((o)->tt) == LUA_TSTRING, &((cast_u(o))->ts))
+#define gco2u(o)  check_exp((o)->tt == LUA_VUSERDATA, &((cast_u(o))->u))
+#define gco2lcl(o)  check_exp((o)->tt == LUA_VLCL, &((cast_u(o))->cl.l))
+#define gco2ccl(o)  check_exp((o)->tt == LUA_VCCL, &((cast_u(o))->cl.c))
+#define gco2cl(o)  \
+	check_exp(novariant((o)->tt) == LUA_TFUNCTION, &((cast_u(o))->cl))
+#define gco2t(o)  check_exp((o)->tt == LUA_VTABLE, &((cast_u(o))->h))
+#define gco2p(o)  check_exp((o)->tt == LUA_VPROTO, &((cast_u(o))->p))
+#define gco2th(o)  check_exp((o)->tt == LUA_VTHREAD, &((cast_u(o))->th))
+#define gco2upv(o)	check_exp((o)->tt == LUA_VUPVAL, &((cast_u(o))->upv))
+
+
+/*
+** macro to convert a Lua object into a GCObject
+** (The access to 'tt' tries to ensure that 'v' is actually a Lua object.)
+*/
+#define obj2gco(v)	check_exp((v)->tt >= LUA_TSTRING, &(cast_u(v)->gc))
+
+
+/* actual number of total bytes allocated */
+#define gettotalbytes(g)	cast(lu_mem, (g)->totalbytes + (g)->GCdebt)
+
+LUAI_FUNC void luaE_setdebt (global_State *g, l_mem debt);
+LUAI_FUNC void luaE_freethread (lua_State *L, lua_State *L1);
+LUAI_FUNC CallInfo *luaE_extendCI (lua_State *L);
+LUAI_FUNC void luaE_shrinkCI (lua_State *L);
+LUAI_FUNC void luaE_checkcstack (lua_State *L);
+LUAI_FUNC void luaE_incCstack (lua_State *L);
+LUAI_FUNC void luaE_warning (lua_State *L, const char *msg, int tocont);
+LUAI_FUNC void luaE_warnerror (lua_State *L, const char *where);
+LUAI_FUNC int luaE_resetthread (lua_State *L, int status);
+
+
+#endif
+
@@ -0,0 +1,274 @@
+/*
+** $Id: lstring.c $
+** String table (keeps all strings handled by Lua)
+** See Copyright Notice in lua.h
+*/
+
+#define lstring_c
+#define LUA_CORE
+
+#include "lprefix.h"
+
+
+#include <string.h>
+
+#include "lua.h"
+
+#include "ldebug.h"
+#include "ldo.h"
+#include "lmem.h"
+#include "lobject.h"
+#include "lstate.h"
+#include "lstring.h"
+
+
+/*
+** Maximum size for string table.
+*/
+#define MAXSTRTB	cast_int(luaM_limitN(MAX_INT, TString*))
+
+
+/*
+** equality for long strings
+*/
+int luaS_eqlngstr (TString *a, TString *b) {
+  size_t len = a->u.lnglen;
+  lua_assert(a->tt == LUA_VLNGSTR && b->tt == LUA_VLNGSTR);
+  return (a == b) ||  /* same instance or... */
+    ((len == b->u.lnglen) &&  /* equal length and ... */
+     (memcmp(getlngstr(a), getlngstr(b), len) == 0));  /* equal contents */
+}
+
+
+unsigned int luaS_hash (const char *str, size_t l, unsigned int seed) {
+  unsigned int h = seed ^ cast_uint(l);
+  for (; l > 0; l--)
+    h ^= ((h<<5) + (h>>2) + cast_byte(str[l - 1]));
+  return h;
+}
+
+
+unsigned int luaS_hashlongstr (TString *ts) {
+  lua_assert(ts->tt == LUA_VLNGSTR);
+  if (ts->extra == 0) {  /* no hash? */
+    size_t len = ts->u.lnglen;
+    ts->hash = luaS_hash(getlngstr(ts), len, ts->hash);
+    ts->extra = 1;  /* now it has its hash */
+  }
+  return ts->hash;
+}
+
+
+static void tablerehash (TString **vect, int osize, int nsize) {
+  int i;
+  for (i = osize; i < nsize; i++)  /* clear new elements */
+    vect[i] = NULL;
+  for (i = 0; i < osize; i++) {  /* rehash old part of the array */
+    TString *p = vect[i];
+    vect[i] = NULL;
+    while (p) {  /* for each string in the list */
+      TString *hnext = p->u.hnext;  /* save next */
+      unsigned int h = lmod(p->hash, nsize);  /* new position */
+      p->u.hnext = vect[h];  /* chain it into array */
+      vect[h] = p;
+      p = hnext;
+    }
+  }
+}
+
+
+/*
+** Resize the string table. If allocation fails, keep the current size.
+** (This can degrade performance, but any non-zero size should work
+** correctly.)
+*/
+void luaS_resize (lua_State *L, int nsize) {
+  stringtable *tb = &G(L)->strt;
+  int osize = tb->size;
+  TString **newvect;
+  if (nsize < osize)  /* shrinking table? */
+    tablerehash(tb->hash, osize, nsize);  /* depopulate shrinking part */
+  newvect = luaM_reallocvector(L, tb->hash, osize, nsize, TString*);
+  if (l_unlikely(newvect == NULL)) {  /* reallocation failed? */
+    if (nsize < osize)  /* was it shrinking table? */
+      tablerehash(tb->hash, nsize, osize);  /* restore to original size */
+    /* leave table as it was */
+  }
+  else {  /* allocation succeeded */
+    tb->hash = newvect;
+    tb->size = nsize;
+    if (nsize > osize)
+      tablerehash(newvect, osize, nsize);  /* rehash for new size */
+  }
+}
+
+
+/*
+** Clear API string cache. (Entries cannot be empty, so fill them with
+** a non-collectable string.)
+*/
+void luaS_clearcache (global_State *g) {
+  int i, j;
+  for (i = 0; i < STRCACHE_N; i++)
+    for (j = 0; j < STRCACHE_M; j++) {
+      if (iswhite(g->strcache[i][j]))  /* will entry be collected? */
+        g->strcache[i][j] = g->memerrmsg;  /* replace it with something fixed */
+    }
+}
+
+
+/*
+** Initialize the string table and the string cache
+*/
+void luaS_init (lua_State *L) {
+  global_State *g = G(L);
+  int i, j;
+  stringtable *tb = &G(L)->strt;
+  tb->hash = luaM_newvector(L, MINSTRTABSIZE, TString*);
+  tablerehash(tb->hash, 0, MINSTRTABSIZE);  /* clear array */
+  tb->size = MINSTRTABSIZE;
+  /* pre-create memory-error message */
+  g->memerrmsg = luaS_newliteral(L, MEMERRMSG);
+  luaC_fix(L, obj2gco(g->memerrmsg));  /* it should never be collected */
+  for (i = 0; i < STRCACHE_N; i++)  /* fill cache with valid strings */
+    for (j = 0; j < STRCACHE_M; j++)
+      g->strcache[i][j] = g->memerrmsg;
+}
+
+
+
+/*
+** creates a new string object
+*/
+static TString *createstrobj (lua_State *L, size_t l, int tag, unsigned int h) {
+  TString *ts;
+  GCObject *o;
+  size_t totalsize;  /* total size of TString object */
+  totalsize = sizelstring(l);
+  o = luaC_newobj(L, tag, totalsize);
+  ts = gco2ts(o);
+  ts->hash = h;
+  ts->extra = 0;
+  getstr(ts)[l] = '\0';  /* ending 0 */
+  return ts;
+}
+
+
+TString *luaS_createlngstrobj (lua_State *L, size_t l) {
+  TString *ts = createstrobj(L, l, LUA_VLNGSTR, G(L)->seed);
+  ts->u.lnglen = l;
+  ts->shrlen = 0xFF;  /* signals that it is a long string */
+  return ts;
+}
+
+
+void luaS_remove (lua_State *L, TString *ts) {
+  stringtable *tb = &G(L)->strt;
+  TString **p = &tb->hash[lmod(ts->hash, tb->size)];
+  while (*p != ts)  /* find previous element */
+    p = &(*p)->u.hnext;
+  *p = (*p)->u.hnext;  /* remove element from its list */
+  tb->nuse--;
+}
+
+
+static void growstrtab (lua_State *L, stringtable *tb) {
+  if (l_unlikely(tb->nuse == MAX_INT)) {  /* too many strings? */
+    luaC_fullgc(L, 1);  /* try to free some... */
+    if (tb->nuse == MAX_INT)  /* still too many? */
+      luaM_error(L);  /* cannot even create a message... */
+  }
+  if (tb->size <= MAXSTRTB / 2)  /* can grow string table? */
+    luaS_resize(L, tb->size * 2);
+}
+
+
+/*
+** Checks whether short string exists and reuses it or creates a new one.
+*/
+static TString *internshrstr (lua_State *L, const char *str, size_t l) {
+  TString *ts;
+  global_State *g = G(L);
+  stringtable *tb = &g->strt;
+  unsigned int h = luaS_hash(str, l, g->seed);
+  TString **list = &tb->hash[lmod(h, tb->size)];
+  lua_assert(str != NULL);  /* otherwise 'memcmp'/'memcpy' are undefined */
+  for (ts = *list; ts != NULL; ts = ts->u.hnext) {
+    if (l == ts->shrlen && (memcmp(str, getshrstr(ts), l * sizeof(char)) == 0)) {
+      /* found! */
+      if (isdead(g, ts))  /* dead (but not collected yet)? */
+        changewhite(ts);  /* resurrect it */
+      return ts;
+    }
+  }
+  /* else must create a new string */
+  if (tb->nuse >= tb->size) {  /* need to grow string table? */
+    growstrtab(L, tb);
+    list = &tb->hash[lmod(h, tb->size)];  /* rehash with new size */
+  }
+  ts = createstrobj(L, l, LUA_VSHRSTR, h);
+  ts->shrlen = cast_byte(l);
+  memcpy(getshrstr(ts), str, l * sizeof(char));
+  ts->u.hnext = *list;
+  *list = ts;
+  tb->nuse++;
+  return ts;
+}
+
+
+/*
+** new string (with explicit length)
+*/
+TString *luaS_newlstr (lua_State *L, const char *str, size_t l) {
+  if (l <= LUAI_MAXSHORTLEN)  /* short string? */
+    return internshrstr(L, str, l);
+  else {
+    TString *ts;
+    if (l_unlikely(l * sizeof(char) >= (MAX_SIZE - sizeof(TString))))
+      luaM_toobig(L);
+    ts = luaS_createlngstrobj(L, l);
+    memcpy(getlngstr(ts), str, l * sizeof(char));
+    return ts;
+  }
+}
+
+
+/*
+** Create or reuse a zero-terminated string, first checking in the
+** cache (using the string address as a key). The cache can contain
+** only zero-terminated strings, so it is safe to use 'strcmp' to
+** check hits.
+*/
+TString *luaS_new (lua_State *L, const char *str) {
+  unsigned int i = point2uint(str) % STRCACHE_N;  /* hash */
+  int j;
+  TString **p = G(L)->strcache[i];
+  for (j = 0; j < STRCACHE_M; j++) {
+    if (strcmp(str, getstr(p[j])) == 0)  /* hit? */
+      return p[j];  /* that is it */
+  }
+  /* normal route */
+  for (j = STRCACHE_M - 1; j > 0; j--)
+    p[j] = p[j - 1];  /* move out last element */
+  /* new element is first in the list */
+  p[0] = luaS_newlstr(L, str, strlen(str));
+  return p[0];
+}
+
+
+Udata *luaS_newudata (lua_State *L, size_t s, int nuvalue) {
+  Udata *u;
+  int i;
+  GCObject *o;
+  if (l_unlikely(s > MAX_SIZE - udatamemoffset(nuvalue)))
+    luaM_toobig(L);
+  o = luaC_newobj(L, LUA_VUSERDATA, sizeudata(nuvalue, s));
+  u = gco2u(o);
+  u->len = s;
+  u->nuvalue = nuvalue;
+  u->metatable = NULL;
+  for (i = 0; i < nuvalue; i++)
+    setnilvalue(&u->uv[i].uv);
+  return u;
+}
+
@@ -0,0 +1,57 @@
+/*
+** $Id: lstring.h $
+** String table (keep all strings handled by Lua)
+** See Copyright Notice in lua.h
+*/
+
+#ifndef lstring_h
+#define lstring_h
+
+#include "lgc.h"
+#include "lobject.h"
+#include "lstate.h"
+
+
+/*
+** Memory-allocation error message must be preallocated (it cannot
+** be created after memory is exhausted)
+*/
+#define MEMERRMSG       "not enough memory"
+
+
+/*
+** Size of a TString: Size of the header plus space for the string
+** itself (including final '\0').
+*/
+#define sizelstring(l)  (offsetof(TString, contents) + ((l) + 1) * sizeof(char))
+
+#define luaS_newliteral(L, s)	(luaS_newlstr(L, "" s, \
+                                 (sizeof(s)/sizeof(char))-1))
+
+
+/*
+** test whether a string is a reserved word
+*/
+#define isreserved(s)	((s)->tt == LUA_VSHRSTR && (s)->extra > 0)
+
+
+/*
+** equality for short strings, which are always internalized
+*/
+#define eqshrstr(a,b)	check_exp((a)->tt == LUA_VSHRSTR, (a) == (b))
+
+
+LUAI_FUNC unsigned int luaS_hash (const char *str, size_t l, unsigned int seed);
+LUAI_FUNC unsigned int luaS_hashlongstr (TString *ts);
+LUAI_FUNC int luaS_eqlngstr (TString *a, TString *b);
+LUAI_FUNC void luaS_resize (lua_State *L, int newsize);
+LUAI_FUNC void luaS_clearcache (global_State *g);
+LUAI_FUNC void luaS_init (lua_State *L);
+LUAI_FUNC void luaS_remove (lua_State *L, TString *ts);
+LUAI_FUNC Udata *luaS_newudata (lua_State *L, size_t s, int nuvalue);
+LUAI_FUNC TString *luaS_newlstr (lua_State *L, const char *str, size_t l);
+LUAI_FUNC TString *luaS_new (lua_State *L, const char *str);
+LUAI_FUNC TString *luaS_createlngstrobj (lua_State *L, size_t l);
+
+
+#endif
@@ -0,0 +1,995 @@
+/*
+** $Id: ltable.c $
+** Lua tables (hash)
+** See Copyright Notice in lua.h
+*/
+
+#define ltable_c
+#define LUA_CORE
+
+#include "lprefix.h"
+
+
+/*
+** Implementation of tables (aka arrays, objects, or hash tables).
+** Tables keep its elements in two parts: an array part and a hash part.
+** Non-negative integer keys are all candidates to be kept in the array
+** part. The actual size of the array is the largest 'n' such that
+** more than half the slots between 1 and n are in use.
+** Hash uses a mix of chained scatter table with Brent's variation.
+** A main invariant of these tables is that, if an element is not
+** in its main position (i.e. the 'original' position that its hash gives
+** to it), then the colliding element is in its own main position.
+** Hence even when the load factor reaches 100%, performance remains good.
+*/
+
+#include <math.h>
+#include <limits.h>
+
+#include "lua.h"
+
+#include "ldebug.h"
+#include "ldo.h"
+#include "lgc.h"
+#include "lmem.h"
+#include "lobject.h"
+#include "lstate.h"
+#include "lstring.h"
+#include "ltable.h"
+#include "lvm.h"
+
+
+/*
+** MAXABITS is the largest integer such that MAXASIZE fits in an
+** unsigned int.
+*/
+#define MAXABITS	cast_int(sizeof(int) * CHAR_BIT - 1)
+
+
+/*
+** MAXASIZE is the maximum size of the array part. It is the minimum
+** between 2^MAXABITS and the maximum size that, measured in bytes,
+** fits in a 'size_t'.
+*/
+#define MAXASIZE	luaM_limitN(1u << MAXABITS, TValue)
+
+/*
+** MAXHBITS is the largest integer such that 2^MAXHBITS fits in a
+** signed int.
+*/
+#define MAXHBITS	(MAXABITS - 1)
+
+
+/*
+** MAXHSIZE is the maximum size of the hash part. It is the minimum
+** between 2^MAXHBITS and the maximum size such that, measured in bytes,
+** it fits in a 'size_t'.
+*/
+#define MAXHSIZE	luaM_limitN(1u << MAXHBITS, Node)
+
+
+/*
+** When the original hash value is good, hashing by a power of 2
+** avoids the cost of '%'.
+*/
+#define hashpow2(t,n)		(gnode(t, lmod((n), sizenode(t))))
+
+/*
+** for other types, it is better to avoid modulo by power of 2, as
+** they can have many 2 factors.
+*/
+#define hashmod(t,n)	(gnode(t, ((n) % ((sizenode(t)-1)|1))))
+
+
+#define hashstr(t,str)		hashpow2(t, (str)->hash)
+#define hashboolean(t,p)	hashpow2(t, p)
+
+
+#define hashpointer(t,p)	hashmod(t, point2uint(p))
+
+
+#define dummynode		(&dummynode_)
+
+static const Node dummynode_ = {
+  {{NULL}, LUA_VEMPTY,  /* value's value and type */
+   LUA_VNIL, 0, {NULL}}  /* key type, next, and key value */
+};
+
+
+static const TValue absentkey = {ABSTKEYCONSTANT};
+
+
+/*
+** Hash for integers. To allow a good hash, use the remainder operator
+** ('%'). If integer fits as a non-negative int, compute an int
+** remainder, which is faster. Otherwise, use an unsigned-integer
+** remainder, which uses all bits and ensures a non-negative result.
+*/
+static Node *hashint (const Table *t, lua_Integer i) {
+  lua_Unsigned ui = l_castS2U(i);
+  if (ui <= cast_uint(INT_MAX))
+    return hashmod(t, cast_int(ui));
+  else
+    return hashmod(t, ui);
+}
+
+
+/*
+** Hash for floating-point numbers.
+** The main computation should be just
+**     n = frexp(n, &i); return (n * INT_MAX) + i
+** but there are some numerical subtleties.
+** In a two-complement representation, INT_MAX does not has an exact
+** representation as a float, but INT_MIN does; because the absolute
+** value of 'frexp' is smaller than 1 (unless 'n' is inf/NaN), the
+** absolute value of the product 'frexp * -INT_MIN' is smaller or equal
+** to INT_MAX. Next, the use of 'unsigned int' avoids overflows when
+** adding 'i'; the use of '~u' (instead of '-u') avoids problems with
+** INT_MIN.
+*/
+#if !defined(l_hashfloat)
+static int l_hashfloat (lua_Number n) {
+  int i;
+  lua_Integer ni;
+  n = l_mathop(frexp)(n, &i) * -cast_num(INT_MIN);
+  if (!lua_numbertointeger(n, &ni)) {  /* is 'n' inf/-inf/NaN? */
+    lua_assert(luai_numisnan(n) || l_mathop(fabs)(n) == cast_num(HUGE_VAL));
+    return 0;
+  }
+  else {  /* normal case */
+    unsigned int u = cast_uint(i) + cast_uint(ni);
+    return cast_int(u <= cast_uint(INT_MAX) ? u : ~u);
+  }
+}
+#endif
+
+
+/*
+** returns the 'main' position of an element in a table (that is,
+** the index of its hash value).
+*/
+static Node *mainpositionTV (const Table *t, const TValue *key) {
+  switch (ttypetag(key)) {
+    case LUA_VNUMINT: {
+      lua_Integer i = ivalue(key);
+      return hashint(t, i);
+    }
+    case LUA_VNUMFLT: {
+      lua_Number n = fltvalue(key);
+      return hashmod(t, l_hashfloat(n));
+    }
+    case LUA_VSHRSTR: {
+      TString *ts = tsvalue(key);
+      return hashstr(t, ts);
+    }
+    case LUA_VLNGSTR: {
+      TString *ts = tsvalue(key);
+      return hashpow2(t, luaS_hashlongstr(ts));
+    }
+    case LUA_VFALSE:
+      return hashboolean(t, 0);
+    case LUA_VTRUE:
+      return hashboolean(t, 1);
+    case LUA_VLIGHTUSERDATA: {
+      void *p = pvalue(key);
+      return hashpointer(t, p);
+    }
+    case LUA_VLCF: {
+      lua_CFunction f = fvalue(key);
+      return hashpointer(t, f);
+    }
+    default: {
+      GCObject *o = gcvalue(key);
+      return hashpointer(t, o);
+    }
+  }
+}
+
+
+l_sinline Node *mainpositionfromnode (const Table *t, Node *nd) {
+  TValue key;
+  getnodekey(cast(lua_State *, NULL), &key, nd);
+  return mainpositionTV(t, &key);
+}
+
+
+/*
+** Check whether key 'k1' is equal to the key in node 'n2'. This
+** equality is raw, so there are no metamethods. Floats with integer
+** values have been normalized, so integers cannot be equal to
+** floats. It is assumed that 'eqshrstr' is simply pointer equality, so
+** that short strings are handled in the default case.
+** A true 'deadok' means to accept dead keys as equal to their original
+** values. All dead keys are compared in the default case, by pointer
+** identity. (Only collectable objects can produce dead keys.) Note that
+** dead long strings are also compared by identity.
+** Once a key is dead, its corresponding value may be collected, and
+** then another value can be created with the same address. If this
+** other value is given to 'next', 'equalkey' will signal a false
+** positive. In a regular traversal, this situation should never happen,
+** as all keys given to 'next' came from the table itself, and therefore
+** could not have been collected. Outside a regular traversal, we
+** have garbage in, garbage out. What is relevant is that this false
+** positive does not break anything.  (In particular, 'next' will return
+** some other valid item on the table or nil.)
+*/
+static int equalkey (const TValue *k1, const Node *n2, int deadok) {
+  if ((rawtt(k1) != keytt(n2)) &&  /* not the same variants? */
+       !(deadok && keyisdead(n2) && iscollectable(k1)))
+   return 0;  /* cannot be same key */
+  switch (keytt(n2)) {
+    case LUA_VNIL: case LUA_VFALSE: case LUA_VTRUE:
+      return 1;
+    case LUA_VNUMINT:
+      return (ivalue(k1) == keyival(n2));
+    case LUA_VNUMFLT:
+      return luai_numeq(fltvalue(k1), fltvalueraw(keyval(n2)));
+    case LUA_VLIGHTUSERDATA:
+      return pvalue(k1) == pvalueraw(keyval(n2));
+    case LUA_VLCF:
+      return fvalue(k1) == fvalueraw(keyval(n2));
+    case ctb(LUA_VLNGSTR):
+      return luaS_eqlngstr(tsvalue(k1), keystrval(n2));
+    default:
+      return gcvalue(k1) == gcvalueraw(keyval(n2));
+  }
+}
+
+
+/*
+** True if value of 'alimit' is equal to the real size of the array
+** part of table 't'. (Otherwise, the array part must be larger than
+** 'alimit'.)
+*/
+#define limitequalsasize(t)	(isrealasize(t) || ispow2((t)->alimit))
+
+
+/*
+** Returns the real size of the 'array' array
+*/
+LUAI_FUNC unsigned int luaH_realasize (const Table *t) {
+  if (limitequalsasize(t))
+    return t->alimit;  /* this is the size */
+  else {
+    unsigned int size = t->alimit;
+    /* compute the smallest power of 2 not smaller than 'size' */
+    size |= (size >> 1);
+    size |= (size >> 2);
+    size |= (size >> 4);
+    size |= (size >> 8);
+#if (UINT_MAX >> 14) > 3  /* unsigned int has more than 16 bits */
+    size |= (size >> 16);
+#if (UINT_MAX >> 30) > 3
+    size |= (size >> 32);  /* unsigned int has more than 32 bits */
+#endif
+#endif
+    size++;
+    lua_assert(ispow2(size) && size/2 < t->alimit && t->alimit < size);
+    return size;
+  }
+}
+
+
+/*
+** Check whether real size of the array is a power of 2.
+** (If it is not, 'alimit' cannot be changed to any other value
+** without changing the real size.)
+*/
+static int ispow2realasize (const Table *t) {
+  return (!isrealasize(t) || ispow2(t->alimit));
+}
+
+
+static unsigned int setlimittosize (Table *t) {
+  t->alimit = luaH_realasize(t);
+  setrealasize(t);
+  return t->alimit;
+}
+
+
+#define limitasasize(t)	check_exp(isrealasize(t), t->alimit)
+
+
+
+/*
+** "Generic" get version. (Not that generic: not valid for integers,
+** which may be in array part, nor for floats with integral values.)
+** See explanation about 'deadok' in function 'equalkey'.
+*/
+static const TValue *getgeneric (Table *t, const TValue *key, int deadok) {
+  Node *n = mainpositionTV(t, key);
+  for (;;) {  /* check whether 'key' is somewhere in the chain */
+    if (equalkey(key, n, deadok))
+      return gval(n);  /* that's it */
+    else {
+      int nx = gnext(n);
+      if (nx == 0)
+        return &absentkey;  /* not found */
+      n += nx;
+    }
+  }
+}
+
+
+/*
+** returns the index for 'k' if 'k' is an appropriate key to live in
+** the array part of a table, 0 otherwise.
+*/
+static unsigned int arrayindex (lua_Integer k) {
+  if (l_castS2U(k) - 1u < MAXASIZE)  /* 'k' in [1, MAXASIZE]? */
+    return cast_uint(k);  /* 'key' is an appropriate array index */
+  else
+    return 0;
+}
+
+
+/*
+** returns the index of a 'key' for table traversals. First goes all
+** elements in the array part, then elements in the hash part. The
+** beginning of a traversal is signaled by 0.
+*/
+static unsigned int findindex (lua_State *L, Table *t, TValue *key,
+                               unsigned int asize) {
+  unsigned int i;
+  if (ttisnil(key)) return 0;  /* first iteration */
+  i = ttisinteger(key) ? arrayindex(ivalue(key)) : 0;
+  if (i - 1u < asize)  /* is 'key' inside array part? */
+    return i;  /* yes; that's the index */
+  else {
+    const TValue *n = getgeneric(t, key, 1);
+    if (l_unlikely(isabstkey(n)))
+      luaG_runerror(L, "invalid key to 'next'");  /* key not found */
+    i = cast_int(nodefromval(n) - gnode(t, 0));  /* key index in hash table */
+    /* hash elements are numbered after array ones */
+    return (i + 1) + asize;
+  }
+}
+
+
+int luaH_next (lua_State *L, Table *t, StkId key) {
+  unsigned int asize = luaH_realasize(t);
+  unsigned int i = findindex(L, t, s2v(key), asize);  /* find original key */
+  for (; i < asize; i++) {  /* try first array part */
+    if (!isempty(&t->array[i])) {  /* a non-empty entry? */
+      setivalue(s2v(key), i + 1);
+      setobj2s(L, key + 1, &t->array[i]);
+      return 1;
+    }
+  }
+  for (i -= asize; cast_int(i) < sizenode(t); i++) {  /* hash part */
+    if (!isempty(gval(gnode(t, i)))) {  /* a non-empty entry? */
+      Node *n = gnode(t, i);
+      getnodekey(L, s2v(key), n);
+      setobj2s(L, key + 1, gval(n));
+      return 1;
+    }
+  }
+  return 0;  /* no more elements */
+}
+
+
+static void freehash (lua_State *L, Table *t) {
+  if (!isdummy(t))
+    luaM_freearray(L, t->node, cast_sizet(sizenode(t)));
+}
+
+
+/*
+** {=============================================================
+** Rehash
+** ==============================================================
+*/
+
+/*
+** Compute the optimal size for the array part of table 't'. 'nums' is a
+** "count array" where 'nums[i]' is the number of integers in the table
+** between 2^(i - 1) + 1 and 2^i. 'pna' enters with the total number of
+** integer keys in the table and leaves with the number of keys that
+** will go to the array part; return the optimal size.  (The condition
+** 'twotoi > 0' in the for loop stops the loop if 'twotoi' overflows.)
+*/
+static unsigned int computesizes (unsigned int nums[], unsigned int *pna) {
+  int i;
+  unsigned int twotoi;  /* 2^i (candidate for optimal size) */
+  unsigned int a = 0;  /* number of elements smaller than 2^i */
+  unsigned int na = 0;  /* number of elements to go to array part */
+  unsigned int optimal = 0;  /* optimal size for array part */
+  /* loop while keys can fill more than half of total size */
+  for (i = 0, twotoi = 1;
+       twotoi > 0 && *pna > twotoi / 2;
+       i++, twotoi *= 2) {
+    a += nums[i];
+    if (a > twotoi/2) {  /* more than half elements present? */
+      optimal = twotoi;  /* optimal size (till now) */
+      na = a;  /* all elements up to 'optimal' will go to array part */
+    }
+  }
+  lua_assert((optimal == 0 || optimal / 2 < na) && na <= optimal);
+  *pna = na;
+  return optimal;
+}
+
+
+static int countint (lua_Integer key, unsigned int *nums) {
+  unsigned int k = arrayindex(key);
+  if (k != 0) {  /* is 'key' an appropriate array index? */
+    nums[luaO_ceillog2(k)]++;  /* count as such */
+    return 1;
+  }
+  else
+    return 0;
+}
+
+
+/*
+** Count keys in array part of table 't': Fill 'nums[i]' with
+** number of keys that will go into corresponding slice and return
+** total number of non-nil keys.
+*/
+static unsigned int numusearray (const Table *t, unsigned int *nums) {
+  int lg;
+  unsigned int ttlg;  /* 2^lg */
+  unsigned int ause = 0;  /* summation of 'nums' */
+  unsigned int i = 1;  /* count to traverse all array keys */
+  unsigned int asize = limitasasize(t);  /* real array size */
+  /* traverse each slice */
+  for (lg = 0, ttlg = 1; lg <= MAXABITS; lg++, ttlg *= 2) {
+    unsigned int lc = 0;  /* counter */
+    unsigned int lim = ttlg;
+    if (lim > asize) {
+      lim = asize;  /* adjust upper limit */
+      if (i > lim)
+        break;  /* no more elements to count */
+    }
+    /* count elements in range (2^(lg - 1), 2^lg] */
+    for (; i <= lim; i++) {
+      if (!isempty(&t->array[i-1]))
+        lc++;
+    }
+    nums[lg] += lc;
+    ause += lc;
+  }
+  return ause;
+}
+
+
+static int numusehash (const Table *t, unsigned int *nums, unsigned int *pna) {
+  int totaluse = 0;  /* total number of elements */
+  int ause = 0;  /* elements added to 'nums' (can go to array part) */
+  int i = sizenode(t);
+  while (i--) {
+    Node *n = &t->node[i];
+    if (!isempty(gval(n))) {
+      if (keyisinteger(n))
+        ause += countint(keyival(n), nums);
+      totaluse++;
+    }
+  }
+  *pna += ause;
+  return totaluse;
+}
+
+
+/*
+** Creates an array for the hash part of a table with the given
+** size, or reuses the dummy node if size is zero.
+** The computation for size overflow is in two steps: the first
+** comparison ensures that the shift in the second one does not
+** overflow.
+*/
+static void setnodevector (lua_State *L, Table *t, unsigned int size) {
+  if (size == 0) {  /* no elements to hash part? */
+    t->node = cast(Node *, dummynode);  /* use common 'dummynode' */
+    t->lsizenode = 0;
+    t->lastfree = NULL;  /* signal that it is using dummy node */
+  }
+  else {
+    int i;
+    int lsize = luaO_ceillog2(size);
+    if (lsize > MAXHBITS || (1u << lsize) > MAXHSIZE)
+      luaG_runerror(L, "table overflow");
+    size = twoto(lsize);
+    t->node = luaM_newvector(L, size, Node);
+    for (i = 0; i < cast_int(size); i++) {
+      Node *n = gnode(t, i);
+      gnext(n) = 0;
+      setnilkey(n);
+      setempty(gval(n));
+    }
+    t->lsizenode = cast_byte(lsize);
+    t->lastfree = gnode(t, size);  /* all positions are free */
+  }
+}
+
+
+/*
+** (Re)insert all elements from the hash part of 'ot' into table 't'.
+*/
+static void reinsert (lua_State *L, Table *ot, Table *t) {
+  int j;
+  int size = sizenode(ot);
+  for (j = 0; j < size; j++) {
+    Node *old = gnode(ot, j);
+    if (!isempty(gval(old))) {
+      /* doesn't need barrier/invalidate cache, as entry was
+         already present in the table */
+      TValue k;
+      getnodekey(L, &k, old);
+      luaH_set(L, t, &k, gval(old));
+    }
+  }
+}
+
+
+/*
+** Exchange the hash part of 't1' and 't2'.
+*/
+static void exchangehashpart (Table *t1, Table *t2) {
+  lu_byte lsizenode = t1->lsizenode;
+  Node *node = t1->node;
+  Node *lastfree = t1->lastfree;
+  t1->lsizenode = t2->lsizenode;
+  t1->node = t2->node;
+  t1->lastfree = t2->lastfree;
+  t2->lsizenode = lsizenode;
+  t2->node = node;
+  t2->lastfree = lastfree;
+}
+
+
+/*
+** Resize table 't' for the new given sizes. Both allocations (for
+** the hash part and for the array part) can fail, which creates some
+** subtleties. If the first allocation, for the hash part, fails, an
+** error is raised and that is it. Otherwise, it copies the elements from
+** the shrinking part of the array (if it is shrinking) into the new
+** hash. Then it reallocates the array part.  If that fails, the table
+** is in its original state; the function frees the new hash part and then
+** raises the allocation error. Otherwise, it sets the new hash part
+** into the table, initializes the new part of the array (if any) with
+** nils and reinserts the elements of the old hash back into the new
+** parts of the table.
+*/
+void luaH_resize (lua_State *L, Table *t, unsigned int newasize,
+                                          unsigned int nhsize) {
+  unsigned int i;
+  Table newt;  /* to keep the new hash part */
+  unsigned int oldasize = setlimittosize(t);
+  TValue *newarray;
+  /* create new hash part with appropriate size into 'newt' */
+  setnodevector(L, &newt, nhsize);
+  if (newasize < oldasize) {  /* will array shrink? */
+    t->alimit = newasize;  /* pretend array has new size... */
+    exchangehashpart(t, &newt);  /* and new hash */
+    /* re-insert into the new hash the elements from vanishing slice */
+    for (i = newasize; i < oldasize; i++) {
+      if (!isempty(&t->array[i]))
+        luaH_setint(L, t, i + 1, &t->array[i]);
+    }
+    t->alimit = oldasize;  /* restore current size... */
+    exchangehashpart(t, &newt);  /* and hash (in case of errors) */
+  }
+  /* allocate new array */
+  newarray = luaM_reallocvector(L, t->array, oldasize, newasize, TValue);
+  if (l_unlikely(newarray == NULL && newasize > 0)) {  /* allocation failed? */
+    freehash(L, &newt);  /* release new hash part */
+    luaM_error(L);  /* raise error (with array unchanged) */
+  }
+  /* allocation ok; initialize new part of the array */
+  exchangehashpart(t, &newt);  /* 't' has the new hash ('newt' has the old) */
+  t->array = newarray;  /* set new array part */
+  t->alimit = newasize;
+  for (i = oldasize; i < newasize; i++)  /* clear new slice of the array */
+     setempty(&t->array[i]);
+  /* re-insert elements from old hash part into new parts */
+  reinsert(L, &newt, t);  /* 'newt' now has the old hash */
+  freehash(L, &newt);  /* free old hash part */
+}
+
+
+void luaH_resizearray (lua_State *L, Table *t, unsigned int nasize) {
+  int nsize = allocsizenode(t);
+  luaH_resize(L, t, nasize, nsize);
+}
+
+/*
+** nums[i] = number of keys 'k' where 2^(i - 1) < k <= 2^i
+*/
+static void rehash (lua_State *L, Table *t, const TValue *ek) {
+  unsigned int asize;  /* optimal size for array part */
+  unsigned int na;  /* number of keys in the array part */
+  unsigned int nums[MAXABITS + 1];
+  int i;
+  int totaluse;
+  for (i = 0; i <= MAXABITS; i++) nums[i] = 0;  /* reset counts */
+  setlimittosize(t);
+  na = numusearray(t, nums);  /* count keys in array part */
+  totaluse = na;  /* all those keys are integer keys */
+  totaluse += numusehash(t, nums, &na);  /* count keys in hash part */
+  /* count extra key */
+  if (ttisinteger(ek))
+    na += countint(ivalue(ek), nums);
+  totaluse++;
+  /* compute new size for array part */
+  asize = computesizes(nums, &na);
+  /* resize the table to new computed sizes */
+  luaH_resize(L, t, asize, totaluse - na);
+}
+
+
+
+/*
+** }=============================================================
+*/
+
+
+Table *luaH_new (lua_State *L) {
+  GCObject *o = luaC_newobj(L, LUA_VTABLE, sizeof(Table));
+  Table *t = gco2t(o);
+  t->metatable = NULL;
+  t->flags = cast_byte(maskflags);  /* table has no metamethod fields */
+  t->array = NULL;
+  t->alimit = 0;
+  setnodevector(L, t, 0);
+  return t;
+}
+
+
+void luaH_free (lua_State *L, Table *t) {
+  freehash(L, t);
+  luaM_freearray(L, t->array, luaH_realasize(t));
+  luaM_free(L, t);
+}
+
+
+static Node *getfreepos (Table *t) {
+  if (!isdummy(t)) {
+    while (t->lastfree > t->node) {
+      t->lastfree--;
+      if (keyisnil(t->lastfree))
+        return t->lastfree;
+    }
+  }
+  return NULL;  /* could not find a free place */
+}
+
+
+
+/*
+** inserts a new key into a hash table; first, check whether key's main
+** position is free. If not, check whether colliding node is in its main
+** position or not: if it is not, move colliding node to an empty place and
+** put new key in its main position; otherwise (colliding node is in its main
+** position), new key goes to an empty position.
+*/
+static void luaH_newkey (lua_State *L, Table *t, const TValue *key,
+                                                 TValue *value) {
+  Node *mp;
+  TValue aux;
+  if (l_unlikely(ttisnil(key)))
+    luaG_runerror(L, "table index is nil");
+  else if (ttisfloat(key)) {
+    lua_Number f = fltvalue(key);
+    lua_Integer k;
+    if (luaV_flttointeger(f, &k, F2Ieq)) {  /* does key fit in an integer? */
+      setivalue(&aux, k);
+      key = &aux;  /* insert it as an integer */
+    }
+    else if (l_unlikely(luai_numisnan(f)))
+      luaG_runerror(L, "table index is NaN");
+  }
+  if (ttisnil(value))
+    return;  /* do not insert nil values */
+  mp = mainpositionTV(t, key);
+  if (!isempty(gval(mp)) || isdummy(t)) {  /* main position is taken? */
+    Node *othern;
+    Node *f = getfreepos(t);  /* get a free place */
+    if (f == NULL) {  /* cannot find a free place? */
+      rehash(L, t, key);  /* grow table */
+      /* whatever called 'newkey' takes care of TM cache */
+      luaH_set(L, t, key, value);  /* insert key into grown table */
+      return;
+    }
+    lua_assert(!isdummy(t));
+    othern = mainpositionfromnode(t, mp);
+    if (othern != mp) {  /* is colliding node out of its main position? */
+      /* yes; move colliding node into free position */
+      while (othern + gnext(othern) != mp)  /* find previous */
+        othern += gnext(othern);
+      gnext(othern) = cast_int(f - othern);  /* rechain to point to 'f' */
+      *f = *mp;  /* copy colliding node into free pos. (mp->next also goes) */
+      if (gnext(mp) != 0) {
+        gnext(f) += cast_int(mp - f);  /* correct 'next' */
+        gnext(mp) = 0;  /* now 'mp' is free */
+      }
+      setempty(gval(mp));
+    }
+    else {  /* colliding node is in its own main position */
+      /* new node will go into free position */
+      if (gnext(mp) != 0)
+        gnext(f) = cast_int((mp + gnext(mp)) - f);  /* chain new position */
+      else lua_assert(gnext(f) == 0);
+      gnext(mp) = cast_int(f - mp);
+      mp = f;
+    }
+  }
+  setnodekey(L, mp, key);
+  luaC_barrierback(L, obj2gco(t), key);
+  lua_assert(isempty(gval(mp)));
+  setobj2t(L, gval(mp), value);
+}
+
+
+/*
+** Search function for integers. If integer is inside 'alimit', get it
+** directly from the array part. Otherwise, if 'alimit' is not
+** the real size of the array, the key still can be in the array part.
+** In this case, do the "Xmilia trick" to check whether 'key-1' is
+** smaller than the real size.
+** The trick works as follow: let 'p' be an integer such that
+**   '2^(p+1) >= alimit > 2^p', or  '2^(p+1) > alimit-1 >= 2^p'.
+** That is, 2^(p+1) is the real size of the array, and 'p' is the highest
+** bit on in 'alimit-1'. What we have to check becomes 'key-1 < 2^(p+1)'.
+** We compute '(key-1) & ~(alimit-1)', which we call 'res'; it will
+** have the 'p' bit cleared. If the key is outside the array, that is,
+** 'key-1 >= 2^(p+1)', then 'res' will have some bit on higher than 'p',
+** therefore it will be larger or equal to 'alimit', and the check
+** will fail. If 'key-1 < 2^(p+1)', then 'res' has no bit on higher than
+** 'p', and as the bit 'p' itself was cleared, 'res' will be smaller
+** than 2^p, therefore smaller than 'alimit', and the check succeeds.
+** As special cases, when 'alimit' is 0 the condition is trivially false,
+** and when 'alimit' is 1 the condition simplifies to 'key-1 < alimit'.
+** If key is 0 or negative, 'res' will have its higher bit on, so that
+** if cannot be smaller than alimit.
+*/
+const TValue *luaH_getint (Table *t, lua_Integer key) {
+  lua_Unsigned alimit = t->alimit;
+  if (l_castS2U(key) - 1u < alimit)  /* 'key' in [1, t->alimit]? */
+    return &t->array[key - 1];
+  else if (!isrealasize(t) &&  /* key still may be in the array part? */
+           (((l_castS2U(key) - 1u) & ~(alimit - 1u)) < alimit)) {
+    t->alimit = cast_uint(key);  /* probably '#t' is here now */
+    return &t->array[key - 1];
+  }
+  else {  /* key is not in the array part; check the hash */
+    Node *n = hashint(t, key);
+    for (;;) {  /* check whether 'key' is somewhere in the chain */
+      if (keyisinteger(n) && keyival(n) == key)
+        return gval(n);  /* that's it */
+      else {
+        int nx = gnext(n);
+        if (nx == 0) break;
+        n += nx;
+      }
+    }
+    return &absentkey;
+  }
+}
+
+
+/*
+** search function for short strings
+*/
+const TValue *luaH_getshortstr (Table *t, TString *key) {
+  Node *n = hashstr(t, key);
+  lua_assert(key->tt == LUA_VSHRSTR);
+  for (;;) {  /* check whether 'key' is somewhere in the chain */
+    if (keyisshrstr(n) && eqshrstr(keystrval(n), key))
+      return gval(n);  /* that's it */
+    else {
+      int nx = gnext(n);
+      if (nx == 0)
+        return &absentkey;  /* not found */
+      n += nx;
+    }
+  }
+}
+
+
+const TValue *luaH_getstr (Table *t, TString *key) {
+  if (key->tt == LUA_VSHRSTR)
+    return luaH_getshortstr(t, key);
+  else {  /* for long strings, use generic case */
+    TValue ko;
+    setsvalue(cast(lua_State *, NULL), &ko, key);
+    return getgeneric(t, &ko, 0);
+  }
+}
+
+
+/*
+** main search function
+*/
+const TValue *luaH_get (Table *t, const TValue *key) {
+  switch (ttypetag(key)) {
+    case LUA_VSHRSTR: return luaH_getshortstr(t, tsvalue(key));
+    case LUA_VNUMINT: return luaH_getint(t, ivalue(key));
+    case LUA_VNIL: return &absentkey;
+    case LUA_VNUMFLT: {
+      lua_Integer k;
+      if (luaV_flttointeger(fltvalue(key), &k, F2Ieq)) /* integral index? */
+        return luaH_getint(t, k);  /* use specialized version */
+      /* else... */
+    }  /* FALLTHROUGH */
+    default:
+      return getgeneric(t, key, 0);
+  }
+}
+
+
+/*
+** Finish a raw "set table" operation, where 'slot' is where the value
+** should have been (the result of a previous "get table").
+** Beware: when using this function you probably need to check a GC
+** barrier and invalidate the TM cache.
+*/
+void luaH_finishset (lua_State *L, Table *t, const TValue *key,
+                                   const TValue *slot, TValue *value) {
+  if (isabstkey(slot))
+    luaH_newkey(L, t, key, value);
+  else
+    setobj2t(L, cast(TValue *, slot), value);
+}
+
+
+/*
+** beware: when using this function you probably need to check a GC
+** barrier and invalidate the TM cache.
+*/
+void luaH_set (lua_State *L, Table *t, const TValue *key, TValue *value) {
+  const TValue *slot = luaH_get(t, key);
+  luaH_finishset(L, t, key, slot, value);
+}
+
+
+void luaH_setint (lua_State *L, Table *t, lua_Integer key, TValue *value) {
+  const TValue *p = luaH_getint(t, key);
+  if (isabstkey(p)) {
+    TValue k;
+    setivalue(&k, key);
+    luaH_newkey(L, t, &k, value);
+  }
+  else
+    setobj2t(L, cast(TValue *, p), value);
+}
+
+
+/*
+** Try to find a boundary in the hash part of table 't'. From the
+** caller, we know that 'j' is zero or present and that 'j + 1' is
+** present. We want to find a larger key that is absent from the
+** table, so that we can do a binary search between the two keys to
+** find a boundary. We keep doubling 'j' until we get an absent index.
+** If the doubling would overflow, we try LUA_MAXINTEGER. If it is
+** absent, we are ready for the binary search. ('j', being max integer,
+** is larger or equal to 'i', but it cannot be equal because it is
+** absent while 'i' is present; so 'j > i'.) Otherwise, 'j' is a
+** boundary. ('j + 1' cannot be a present integer key because it is
+** not a valid integer in Lua.)
+*/
+static lua_Unsigned hash_search (Table *t, lua_Unsigned j) {
+  lua_Unsigned i;
+  if (j == 0) j++;  /* the caller ensures 'j + 1' is present */
+  do {
+    i = j;  /* 'i' is a present index */
+    if (j <= l_castS2U(LUA_MAXINTEGER) / 2)
+      j *= 2;
+    else {
+      j = LUA_MAXINTEGER;
+      if (isempty(luaH_getint(t, j)))  /* t[j] not present? */
+        break;  /* 'j' now is an absent index */
+      else  /* weird case */
+        return j;  /* well, max integer is a boundary... */
+    }
+  } while (!isempty(luaH_getint(t, j)));  /* repeat until an absent t[j] */
+  /* i < j  &&  t[i] present  &&  t[j] absent */
+  while (j - i > 1u) {  /* do a binary search between them */
+    lua_Unsigned m = (i + j) / 2;
+    if (isempty(luaH_getint(t, m))) j = m;
+    else i = m;
+  }
+  return i;
+}
+
+
+static unsigned int binsearch (const TValue *array, unsigned int i,
+                                                    unsigned int j) {
+  while (j - i > 1u) {  /* binary search */
+    unsigned int m = (i + j) / 2;
+    if (isempty(&array[m - 1])) j = m;
+    else i = m;
+  }
+  return i;
+}
+
+
+/*
+** Try to find a boundary in table 't'. (A 'boundary' is an integer index
+** such that t[i] is present and t[i+1] is absent, or 0 if t[1] is absent
+** and 'maxinteger' if t[maxinteger] is present.)
+** (In the next explanation, we use Lua indices, that is, with base 1.
+** The code itself uses base 0 when indexing the array part of the table.)
+** The code starts with 'limit = t->alimit', a position in the array
+** part that may be a boundary.
+**
+** (1) If 't[limit]' is empty, there must be a boundary before it.
+** As a common case (e.g., after 't[#t]=nil'), check whether 'limit-1'
+** is present. If so, it is a boundary. Otherwise, do a binary search
+** between 0 and limit to find a boundary. In both cases, try to
+** use this boundary as the new 'alimit', as a hint for the next call.
+**
+** (2) If 't[limit]' is not empty and the array has more elements
+** after 'limit', try to find a boundary there. Again, try first
+** the special case (which should be quite frequent) where 'limit+1'
+** is empty, so that 'limit' is a boundary. Otherwise, check the
+** last element of the array part. If it is empty, there must be a
+** boundary between the old limit (present) and the last element
+** (absent), which is found with a binary search. (This boundary always
+** can be a new limit.)
+**
+** (3) The last case is when there are no elements in the array part
+** (limit == 0) or its last element (the new limit) is present.
+** In this case, must check the hash part. If there is no hash part
+** or 'limit+1' is absent, 'limit' is a boundary.  Otherwise, call
+** 'hash_search' to find a boundary in the hash part of the table.
+** (In those cases, the boundary is not inside the array part, and
+** therefore cannot be used as a new limit.)
+*/
+lua_Unsigned luaH_getn (Table *t) {
+  unsigned int limit = t->alimit;
+  if (limit > 0 && isempty(&t->array[limit - 1])) {  /* (1)? */
+    /* there must be a boundary before 'limit' */
+    if (limit >= 2 && !isempty(&t->array[limit - 2])) {
+      /* 'limit - 1' is a boundary; can it be a new limit? */
+      if (ispow2realasize(t) && !ispow2(limit - 1)) {
+        t->alimit = limit - 1;
+        setnorealasize(t);  /* now 'alimit' is not the real size */
+      }
+      return limit - 1;
+    }
+    else {  /* must search for a boundary in [0, limit] */
+      unsigned int boundary = binsearch(t->array, 0, limit);
+      /* can this boundary represent the real size of the array? */
+      if (ispow2realasize(t) && boundary > luaH_realasize(t) / 2) {
+        t->alimit = boundary;  /* use it as the new limit */
+        setnorealasize(t);
+      }
+      return boundary;
+    }
+  }
+  /* 'limit' is zero or present in table */
+  if (!limitequalsasize(t)) {  /* (2)? */
+    /* 'limit' > 0 and array has more elements after 'limit' */
+    if (isempty(&t->array[limit]))  /* 'limit + 1' is empty? */
+      return limit;  /* this is the boundary */
+    /* else, try last element in the array */
+    limit = luaH_realasize(t);
+    if (isempty(&t->array[limit - 1])) {  /* empty? */
+      /* there must be a boundary in the array after old limit,
+         and it must be a valid new limit */
+      unsigned int boundary = binsearch(t->array, t->alimit, limit);
+      t->alimit = boundary;
+      return boundary;
+    }
+    /* else, new limit is present in the table; check the hash part */
+  }
+  /* (3) 'limit' is the last element and either is zero or present in table */
+  lua_assert(limit == luaH_realasize(t) &&
+             (limit == 0 || !isempty(&t->array[limit - 1])));
+  if (isdummy(t) || isempty(luaH_getint(t, cast(lua_Integer, limit + 1))))
+    return limit;  /* 'limit + 1' is absent */
+  else  /* 'limit + 1' is also present */
+    return hash_search(t, limit);
+}
+
+
+
+#if defined(LUA_DEBUG)
+
+/* export these functions for the test library */
+
+Node *luaH_mainposition (const Table *t, const TValue *key) {
+  return mainpositionTV(t, key);
+}
+
+#endif
@@ -0,0 +1,63 @@
+/*
+** $Id: ltable.h $
+** Lua tables (hash)
+** See Copyright Notice in lua.h
+*/
+
+#ifndef ltable_h
+#define ltable_h
+
+#include "lobject.h"
+
+
+#define gnode(t,i)	(&(t)->node[i])
+#define gval(n)		(&(n)->i_val)
+#define gnext(n)	((n)->u.next)
+
+
+/*
+** Clear all bits of fast-access metamethods, which means that the table
+** may have any of these metamethods. (First access that fails after the
+** clearing will set the bit again.)
+*/
+#define invalidateTMcache(t)	((t)->flags &= ~maskflags)
+
+
+/* true when 't' is using 'dummynode' as its hash part */
+#define isdummy(t)		((t)->lastfree == NULL)
+
+
+/* allocated size for hash nodes */
+#define allocsizenode(t)	(isdummy(t) ? 0 : sizenode(t))
+
+
+/* returns the Node, given the value of a table entry */
+#define nodefromval(v)	cast(Node *, (v))
+
+
+LUAI_FUNC const TValue *luaH_getint (Table *t, lua_Integer key);
+LUAI_FUNC void luaH_setint (lua_State *L, Table *t, lua_Integer key,
+                                                    TValue *value);
+LUAI_FUNC const TValue *luaH_getshortstr (Table *t, TString *key);
+LUAI_FUNC const TValue *luaH_getstr (Table *t, TString *key);
+LUAI_FUNC const TValue *luaH_get (Table *t, const TValue *key);
+LUAI_FUNC void luaH_set (lua_State *L, Table *t, const TValue *key,
+                                                 TValue *value);
+LUAI_FUNC void luaH_finishset (lua_State *L, Table *t, const TValue *key,
+                                       const TValue *slot, TValue *value);
+LUAI_FUNC Table *luaH_new (lua_State *L);
+LUAI_FUNC void luaH_resize (lua_State *L, Table *t, unsigned int nasize,
+                                                    unsigned int nhsize);
+LUAI_FUNC void luaH_resizearray (lua_State *L, Table *t, unsigned int nasize);
+LUAI_FUNC void luaH_free (lua_State *L, Table *t);
+LUAI_FUNC int luaH_next (lua_State *L, Table *t, StkId key);
+LUAI_FUNC lua_Unsigned luaH_getn (Table *t);
+LUAI_FUNC unsigned int luaH_realasize (const Table *t);
+
+
+#if defined(LUA_DEBUG)
+LUAI_FUNC Node *luaH_mainposition (const Table *t, const TValue *key);
+#endif
+
+
+#endif
@@ -0,0 +1,430 @@
+/*
+** $Id: ltablib.c $
+** Library for Table Manipulation
+** See Copyright Notice in lua.h
+*/
+
+#define ltablib_c
+#define LUA_LIB
+
+#include "lprefix.h"
+
+
+#include <limits.h>
+#include <stddef.h>
+#include <string.h>
+
+#include "lua.h"
+
+#include "lauxlib.h"
+#include "lualib.h"
+
+
+/*
+** Operations that an object must define to mimic a table
+** (some functions only need some of them)
+*/
+#define TAB_R	1			/* read */
+#define TAB_W	2			/* write */
+#define TAB_L	4			/* length */
+#define TAB_RW	(TAB_R | TAB_W)		/* read/write */
+
+
+#define aux_getn(L,n,w)	(checktab(L, n, (w) | TAB_L), luaL_len(L, n))
+
+
+static int checkfield (lua_State *L, const char *key, int n) {
+  lua_pushstring(L, key);
+  return (lua_rawget(L, -n) != LUA_TNIL);
+}
+
+
+/*
+** Check that 'arg' either is a table or can behave like one (that is,
+** has a metatable with the required metamethods)
+*/
+static void checktab (lua_State *L, int arg, int what) {
+  if (lua_type(L, arg) != LUA_TTABLE) {  /* is it not a table? */
+    int n = 1;  /* number of elements to pop */
+    if (lua_getmetatable(L, arg) &&  /* must have metatable */
+        (!(what & TAB_R) || checkfield(L, "__index", ++n)) &&
+        (!(what & TAB_W) || checkfield(L, "__newindex", ++n)) &&
+        (!(what & TAB_L) || checkfield(L, "__len", ++n))) {
+      lua_pop(L, n);  /* pop metatable and tested metamethods */
+    }
+    else
+      luaL_checktype(L, arg, LUA_TTABLE);  /* force an error */
+  }
+}
+
+
+static int tinsert (lua_State *L) {
+  lua_Integer pos;  /* where to insert new element */
+  lua_Integer e = aux_getn(L, 1, TAB_RW);
+  e = luaL_intop(+, e, 1);  /* first empty element */
+  switch (lua_gettop(L)) {
+    case 2: {  /* called with only 2 arguments */
+      pos = e;  /* insert new element at the end */
+      break;
+    }
+    case 3: {
+      lua_Integer i;
+      pos = luaL_checkinteger(L, 2);  /* 2nd argument is the position */
+      /* check whether 'pos' is in [1, e] */
+      luaL_argcheck(L, (lua_Unsigned)pos - 1u < (lua_Unsigned)e, 2,
+                       "position out of bounds");
+      for (i = e; i > pos; i--) {  /* move up elements */
+        lua_geti(L, 1, i - 1);
+        lua_seti(L, 1, i);  /* t[i] = t[i - 1] */
+      }
+      break;
+    }
+    default: {
+      return luaL_error(L, "wrong number of arguments to 'insert'");
+    }
+  }
+  lua_seti(L, 1, pos);  /* t[pos] = v */
+  return 0;
+}
+
+
+static int tremove (lua_State *L) {
+  lua_Integer size = aux_getn(L, 1, TAB_RW);
+  lua_Integer pos = luaL_optinteger(L, 2, size);
+  if (pos != size)  /* validate 'pos' if given */
+    /* check whether 'pos' is in [1, size + 1] */
+    luaL_argcheck(L, (lua_Unsigned)pos - 1u <= (lua_Unsigned)size, 2,
+                     "position out of bounds");
+  lua_geti(L, 1, pos);  /* result = t[pos] */
+  for ( ; pos < size; pos++) {
+    lua_geti(L, 1, pos + 1);
+    lua_seti(L, 1, pos);  /* t[pos] = t[pos + 1] */
+  }
+  lua_pushnil(L);
+  lua_seti(L, 1, pos);  /* remove entry t[pos] */
+  return 1;
+}
+
+
+/*
+** Copy elements (1[f], ..., 1[e]) into (tt[t], tt[t+1], ...). Whenever
+** possible, copy in increasing order, which is better for rehashing.
+** "possible" means destination after original range, or smaller
+** than origin, or copying to another table.
+*/
+static int tmove (lua_State *L) {
+  lua_Integer f = luaL_checkinteger(L, 2);
+  lua_Integer e = luaL_checkinteger(L, 3);
+  lua_Integer t = luaL_checkinteger(L, 4);
+  int tt = !lua_isnoneornil(L, 5) ? 5 : 1;  /* destination table */
+  checktab(L, 1, TAB_R);
+  checktab(L, tt, TAB_W);
+  if (e >= f) {  /* otherwise, nothing to move */
+    lua_Integer n, i;
+    luaL_argcheck(L, f > 0 || e < LUA_MAXINTEGER + f, 3,
+                  "too many elements to move");
+    n = e - f + 1;  /* number of elements to move */
+    luaL_argcheck(L, t <= LUA_MAXINTEGER - n + 1, 4,
+                  "destination wrap around");
+    if (t > e || t <= f || (tt != 1 && !lua_compare(L, 1, tt, LUA_OPEQ))) {
+      for (i = 0; i < n; i++) {
+        lua_geti(L, 1, f + i);
+        lua_seti(L, tt, t + i);
+      }
+    }
+    else {
+      for (i = n - 1; i >= 0; i--) {
+        lua_geti(L, 1, f + i);
+        lua_seti(L, tt, t + i);
+      }
+    }
+  }
+  lua_pushvalue(L, tt);  /* return destination table */
+  return 1;
+}
+
+
+static void addfield (lua_State *L, luaL_Buffer *b, lua_Integer i) {
+  lua_geti(L, 1, i);
+  if (l_unlikely(!lua_isstring(L, -1)))
+    luaL_error(L, "invalid value (%s) at index %I in table for 'concat'",
+                  luaL_typename(L, -1), (LUAI_UACINT)i);
+  luaL_addvalue(b);
+}
+
+
+static int tconcat (lua_State *L) {
+  luaL_Buffer b;
+  lua_Integer last = aux_getn(L, 1, TAB_R);
+  size_t lsep;
+  const char *sep = luaL_optlstring(L, 2, "", &lsep);
+  lua_Integer i = luaL_optinteger(L, 3, 1);
+  last = luaL_optinteger(L, 4, last);
+  luaL_buffinit(L, &b);
+  for (; i < last; i++) {
+    addfield(L, &b, i);
+    luaL_addlstring(&b, sep, lsep);
+  }
+  if (i == last)  /* add last value (if interval was not empty) */
+    addfield(L, &b, i);
+  luaL_pushresult(&b);
+  return 1;
+}
+
+
+/*
+** {======================================================
+** Pack/unpack
+** =======================================================
+*/
+
+static int tpack (lua_State *L) {
+  int i;
+  int n = lua_gettop(L);  /* number of elements to pack */
+  lua_createtable(L, n, 1);  /* create result table */
+  lua_insert(L, 1);  /* put it at index 1 */
+  for (i = n; i >= 1; i--)  /* assign elements */
+    lua_seti(L, 1, i);
+  lua_pushinteger(L, n);
+  lua_setfield(L, 1, "n");  /* t.n = number of elements */
+  return 1;  /* return table */
+}
+
+
+static int tunpack (lua_State *L) {
+  lua_Unsigned n;
+  lua_Integer i = luaL_optinteger(L, 2, 1);
+  lua_Integer e = luaL_opt(L, luaL_checkinteger, 3, luaL_len(L, 1));
+  if (i > e) return 0;  /* empty range */
+  n = (lua_Unsigned)e - i;  /* number of elements minus 1 (avoid overflows) */
+  if (l_unlikely(n >= (unsigned int)INT_MAX  ||
+                 !lua_checkstack(L, (int)(++n))))
+    return luaL_error(L, "too many results to unpack");
+  for (; i < e; i++) {  /* push arg[i..e - 1] (to avoid overflows) */
+    lua_geti(L, 1, i);
+  }
+  lua_geti(L, 1, e);  /* push last element */
+  return (int)n;
+}
+
+/* }====================================================== */
+
+
+
+/*
+** {======================================================
+** Quicksort
+** (based on 'Algorithms in MODULA-3', Robert Sedgewick;
+**  Addison-Wesley, 1993.)
+** =======================================================
+*/
+
+
+/* type for array indices */
+typedef unsigned int IdxT;
+
+
+/*
+** Produce a "random" 'unsigned int' to randomize pivot choice. This
+** macro is used only when 'sort' detects a big imbalance in the result
+** of a partition. (If you don't want/need this "randomness", ~0 is a
+** good choice.)
+*/
+#if !defined(l_randomizePivot)		/* { */
+
+#include <time.h>
+
+/* size of 'e' measured in number of 'unsigned int's */
+#define sof(e)		(sizeof(e) / sizeof(unsigned int))
+
+/*
+** Use 'time' and 'clock' as sources of "randomness". Because we don't
+** know the types 'clock_t' and 'time_t', we cannot cast them to
+** anything without risking overflows. A safe way to use their values
+** is to copy them to an array of a known type and use the array values.
+*/
+static unsigned int l_randomizePivot (void) {
+  clock_t c = clock();
+  time_t t = time(NULL);
+  unsigned int buff[sof(c) + sof(t)];
+  unsigned int i, rnd = 0;
+  memcpy(buff, &c, sof(c) * sizeof(unsigned int));
+  memcpy(buff + sof(c), &t, sof(t) * sizeof(unsigned int));
+  for (i = 0; i < sof(buff); i++)
+    rnd += buff[i];
+  return rnd;
+}
+
+#endif					/* } */
+
+
+/* arrays larger than 'RANLIMIT' may use randomized pivots */
+#define RANLIMIT	100u
+
+
+static void set2 (lua_State *L, IdxT i, IdxT j) {
+  lua_seti(L, 1, i);
+  lua_seti(L, 1, j);
+}
+
+
+/*
+** Return true iff value at stack index 'a' is less than the value at
+** index 'b' (according to the order of the sort).
+*/
+static int sort_comp (lua_State *L, int a, int b) {
+  if (lua_isnil(L, 2))  /* no function? */
+    return lua_compare(L, a, b, LUA_OPLT);  /* a < b */
+  else {  /* function */
+    int res;
+    lua_pushvalue(L, 2);    /* push function */
+    lua_pushvalue(L, a-1);  /* -1 to compensate function */
+    lua_pushvalue(L, b-2);  /* -2 to compensate function and 'a' */
+    lua_call(L, 2, 1);      /* call function */
+    res = lua_toboolean(L, -1);  /* get result */
+    lua_pop(L, 1);          /* pop result */
+    return res;
+  }
+}
+
+
+/*
+** Does the partition: Pivot P is at the top of the stack.
+** precondition: a[lo] <= P == a[up-1] <= a[up],
+** so it only needs to do the partition from lo + 1 to up - 2.
+** Pos-condition: a[lo .. i - 1] <= a[i] == P <= a[i + 1 .. up]
+** returns 'i'.
+*/
+static IdxT partition (lua_State *L, IdxT lo, IdxT up) {
+  IdxT i = lo;  /* will be incremented before first use */
+  IdxT j = up - 1;  /* will be decremented before first use */
+  /* loop invariant: a[lo .. i] <= P <= a[j .. up] */
+  for (;;) {
+    /* next loop: repeat ++i while a[i] < P */
+    while ((void)lua_geti(L, 1, ++i), sort_comp(L, -1, -2)) {
+      if (l_unlikely(i == up - 1))  /* a[i] < P  but a[up - 1] == P  ?? */
+        luaL_error(L, "invalid order function for sorting");
+      lua_pop(L, 1);  /* remove a[i] */
+    }
+    /* after the loop, a[i] >= P and a[lo .. i - 1] < P */
+    /* next loop: repeat --j while P < a[j] */
+    while ((void)lua_geti(L, 1, --j), sort_comp(L, -3, -1)) {
+      if (l_unlikely(j < i))  /* j < i  but  a[j] > P ?? */
+        luaL_error(L, "invalid order function for sorting");
+      lua_pop(L, 1);  /* remove a[j] */
+    }
+    /* after the loop, a[j] <= P and a[j + 1 .. up] >= P */
+    if (j < i) {  /* no elements out of place? */
+      /* a[lo .. i - 1] <= P <= a[j + 1 .. i .. up] */
+      lua_pop(L, 1);  /* pop a[j] */
+      /* swap pivot (a[up - 1]) with a[i] to satisfy pos-condition */
+      set2(L, up - 1, i);
+      return i;
+    }
+    /* otherwise, swap a[i] - a[j] to restore invariant and repeat */
+    set2(L, i, j);
+  }
+}
+
+
+/*
+** Choose an element in the middle (2nd-3th quarters) of [lo,up]
+** "randomized" by 'rnd'
+*/
+static IdxT choosePivot (IdxT lo, IdxT up, unsigned int rnd) {
+  IdxT r4 = (up - lo) / 4;  /* range/4 */
+  IdxT p = rnd % (r4 * 2) + (lo + r4);
+  lua_assert(lo + r4 <= p && p <= up - r4);
+  return p;
+}
+
+
+/*
+** Quicksort algorithm (recursive function)
+*/
+static void auxsort (lua_State *L, IdxT lo, IdxT up,
+                                   unsigned int rnd) {
+  while (lo < up) {  /* loop for tail recursion */
+    IdxT p;  /* Pivot index */
+    IdxT n;  /* to be used later */
+    /* sort elements 'lo', 'p', and 'up' */
+    lua_geti(L, 1, lo);
+    lua_geti(L, 1, up);
+    if (sort_comp(L, -1, -2))  /* a[up] < a[lo]? */
+      set2(L, lo, up);  /* swap a[lo] - a[up] */
+    else
+      lua_pop(L, 2);  /* remove both values */
+    if (up - lo == 1)  /* only 2 elements? */
+      return;  /* already sorted */
+    if (up - lo < RANLIMIT || rnd == 0)  /* small interval or no randomize? */
+      p = (lo + up)/2;  /* middle element is a good pivot */
+    else  /* for larger intervals, it is worth a random pivot */
+      p = choosePivot(lo, up, rnd);
+    lua_geti(L, 1, p);
+    lua_geti(L, 1, lo);
+    if (sort_comp(L, -2, -1))  /* a[p] < a[lo]? */
+      set2(L, p, lo);  /* swap a[p] - a[lo] */
+    else {
+      lua_pop(L, 1);  /* remove a[lo] */
+      lua_geti(L, 1, up);
+      if (sort_comp(L, -1, -2))  /* a[up] < a[p]? */
+        set2(L, p, up);  /* swap a[up] - a[p] */
+      else
+        lua_pop(L, 2);
+    }
+    if (up - lo == 2)  /* only 3 elements? */
+      return;  /* already sorted */
+    lua_geti(L, 1, p);  /* get middle element (Pivot) */
+    lua_pushvalue(L, -1);  /* push Pivot */
+    lua_geti(L, 1, up - 1);  /* push a[up - 1] */
+    set2(L, p, up - 1);  /* swap Pivot (a[p]) with a[up - 1] */
+    p = partition(L, lo, up);
+    /* a[lo .. p - 1] <= a[p] == P <= a[p + 1 .. up] */
+    if (p - lo < up - p) {  /* lower interval is smaller? */
+      auxsort(L, lo, p - 1, rnd);  /* call recursively for lower interval */
+      n = p - lo;  /* size of smaller interval */
+      lo = p + 1;  /* tail call for [p + 1 .. up] (upper interval) */
+    }
+    else {
+      auxsort(L, p + 1, up, rnd);  /* call recursively for upper interval */
+      n = up - p;  /* size of smaller interval */
+      up = p - 1;  /* tail call for [lo .. p - 1]  (lower interval) */
+    }
+    if ((up - lo) / 128 > n) /* partition too imbalanced? */
+      rnd = l_randomizePivot();  /* try a new randomization */
+  }  /* tail call auxsort(L, lo, up, rnd) */
+}
+
+
+static int sort (lua_State *L) {
+  lua_Integer n = aux_getn(L, 1, TAB_RW);
+  if (n > 1) {  /* non-trivial interval? */
+    luaL_argcheck(L, n < INT_MAX, 1, "array too big");
+    if (!lua_isnoneornil(L, 2))  /* is there a 2nd argument? */
+      luaL_checktype(L, 2, LUA_TFUNCTION);  /* must be a function */
+    lua_settop(L, 2);  /* make sure there are two arguments */
+    auxsort(L, 1, (IdxT)n, 0);
+  }
+  return 0;
+}
+
+/* }====================================================== */
+
+
+static const luaL_Reg tab_funcs[] = {
+  {"concat", tconcat},
+  {"insert", tinsert},
+  {"pack", tpack},
+  {"unpack", tunpack},
+  {"remove", tremove},
+  {"move", tmove},
+  {"sort", sort},
+  {NULL, NULL}
+};
+
+
+LUAMOD_API int luaopen_table (lua_State *L) {
+  luaL_newlib(L, tab_funcs);
+  return 1;
+}
+
@@ -0,0 +1,271 @@
+/*
+** $Id: ltm.c $
+** Tag methods
+** See Copyright Notice in lua.h
+*/
+
+#define ltm_c
+#define LUA_CORE
+
+#include "lprefix.h"
+
+
+#include <string.h>
+
+#include "lua.h"
+
+#include "ldebug.h"
+#include "ldo.h"
+#include "lgc.h"
+#include "lobject.h"
+#include "lstate.h"
+#include "lstring.h"
+#include "ltable.h"
+#include "ltm.h"
+#include "lvm.h"
+
+
+static const char udatatypename[] = "userdata";
+
+LUAI_DDEF const char *const luaT_typenames_[LUA_TOTALTYPES] = {
+  "no value",
+  "nil", "boolean", udatatypename, "number",
+  "string", "table", "function", udatatypename, "thread",
+  "upvalue", "proto" /* these last cases are used for tests only */
+};
+
+
+void luaT_init (lua_State *L) {
+  static const char *const luaT_eventname[] = {  /* ORDER TM */
+    "__index", "__newindex",
+    "__gc", "__mode", "__len", "__eq",
+    "__add", "__sub", "__mul", "__mod", "__pow",
+    "__div", "__idiv",
+    "__band", "__bor", "__bxor", "__shl", "__shr",
+    "__unm", "__bnot", "__lt", "__le",
+    "__concat", "__call", "__close"
+  };
+  int i;
+  for (i=0; i<TM_N; i++) {
+    G(L)->tmname[i] = luaS_new(L, luaT_eventname[i]);
+    luaC_fix(L, obj2gco(G(L)->tmname[i]));  /* never collect these names */
+  }
+}
+
+
+/*
+** function to be used with macro "fasttm": optimized for absence of
+** tag methods
+*/
+const TValue *luaT_gettm (Table *events, TMS event, TString *ename) {
+  const TValue *tm = luaH_getshortstr(events, ename);
+  lua_assert(event <= TM_EQ);
+  if (notm(tm)) {  /* no tag method? */
+    events->flags |= cast_byte(1u<<event);  /* cache this fact */
+    return NULL;
+  }
+  else return tm;
+}
+
+
+const TValue *luaT_gettmbyobj (lua_State *L, const TValue *o, TMS event) {
+  Table *mt;
+  switch (ttype(o)) {
+    case LUA_TTABLE:
+      mt = hvalue(o)->metatable;
+      break;
+    case LUA_TUSERDATA:
+      mt = uvalue(o)->metatable;
+      break;
+    default:
+      mt = G(L)->mt[ttype(o)];
+  }
+  return (mt ? luaH_getshortstr(mt, G(L)->tmname[event]) : &G(L)->nilvalue);
+}
+
+
+/*
+** Return the name of the type of an object. For tables and userdata
+** with metatable, use their '__name' metafield, if present.
+*/
+const char *luaT_objtypename (lua_State *L, const TValue *o) {
+  Table *mt;
+  if ((ttistable(o) && (mt = hvalue(o)->metatable) != NULL) ||
+      (ttisfulluserdata(o) && (mt = uvalue(o)->metatable) != NULL)) {
+    const TValue *name = luaH_getshortstr(mt, luaS_new(L, "__name"));
+    if (ttisstring(name))  /* is '__name' a string? */
+      return getstr(tsvalue(name));  /* use it as type name */
+  }
+  return ttypename(ttype(o));  /* else use standard type name */
+}
+
+
+void luaT_callTM (lua_State *L, const TValue *f, const TValue *p1,
+                  const TValue *p2, const TValue *p3) {
+  StkId func = L->top.p;
+  setobj2s(L, func, f);  /* push function (assume EXTRA_STACK) */
+  setobj2s(L, func + 1, p1);  /* 1st argument */
+  setobj2s(L, func + 2, p2);  /* 2nd argument */
+  setobj2s(L, func + 3, p3);  /* 3rd argument */
+  L->top.p = func + 4;
+  /* metamethod may yield only when called from Lua code */
+  if (isLuacode(L->ci))
+    luaD_call(L, func, 0);
+  else
+    luaD_callnoyield(L, func, 0);
+}
+
+
+void luaT_callTMres (lua_State *L, const TValue *f, const TValue *p1,
+                     const TValue *p2, StkId res) {
+  ptrdiff_t result = savestack(L, res);
+  StkId func = L->top.p;
+  setobj2s(L, func, f);  /* push function (assume EXTRA_STACK) */
+  setobj2s(L, func + 1, p1);  /* 1st argument */
+  setobj2s(L, func + 2, p2);  /* 2nd argument */
+  L->top.p += 3;
+  /* metamethod may yield only when called from Lua code */
+  if (isLuacode(L->ci))
+    luaD_call(L, func, 1);
+  else
+    luaD_callnoyield(L, func, 1);
+  res = restorestack(L, result);
+  setobjs2s(L, res, --L->top.p);  /* move result to its place */
+}
+
+
+static int callbinTM (lua_State *L, const TValue *p1, const TValue *p2,
+                      StkId res, TMS event) {
+  const TValue *tm = luaT_gettmbyobj(L, p1, event);  /* try first operand */
+  if (notm(tm))
+    tm = luaT_gettmbyobj(L, p2, event);  /* try second operand */
+  if (notm(tm)) return 0;
+  luaT_callTMres(L, tm, p1, p2, res);
+  return 1;
+}
+
+
+void luaT_trybinTM (lua_State *L, const TValue *p1, const TValue *p2,
+                    StkId res, TMS event) {
+  if (l_unlikely(!callbinTM(L, p1, p2, res, event))) {
+    switch (event) {
+      case TM_BAND: case TM_BOR: case TM_BXOR:
+      case TM_SHL: case TM_SHR: case TM_BNOT: {
+        if (ttisnumber(p1) && ttisnumber(p2))
+          luaG_tointerror(L, p1, p2);
+        else
+          luaG_opinterror(L, p1, p2, "perform bitwise operation on");
+      }
+      /* calls never return, but to avoid warnings: *//* FALLTHROUGH */
+      default:
+        luaG_opinterror(L, p1, p2, "perform arithmetic on");
+    }
+  }
+}
+
+
+void luaT_tryconcatTM (lua_State *L) {
+  StkId top = L->top.p;
+  if (l_unlikely(!callbinTM(L, s2v(top - 2), s2v(top - 1), top - 2,
+                               TM_CONCAT)))
+    luaG_concaterror(L, s2v(top - 2), s2v(top - 1));
+}
+
+
+void luaT_trybinassocTM (lua_State *L, const TValue *p1, const TValue *p2,
+                                       int flip, StkId res, TMS event) {
+  if (flip)
+    luaT_trybinTM(L, p2, p1, res, event);
+  else
+    luaT_trybinTM(L, p1, p2, res, event);
+}
+
+
+void luaT_trybiniTM (lua_State *L, const TValue *p1, lua_Integer i2,
+                                   int flip, StkId res, TMS event) {
+  TValue aux;
+  setivalue(&aux, i2);
+  luaT_trybinassocTM(L, p1, &aux, flip, res, event);
+}
+
+
+/*
+** Calls an order tag method.
+** For lessequal, LUA_COMPAT_LT_LE keeps compatibility with old
+** behavior: if there is no '__le', try '__lt', based on l <= r iff
+** !(r < l) (assuming a total order). If the metamethod yields during
+** this substitution, the continuation has to know about it (to negate
+** the result of r<l); bit CIST_LEQ in the call status keeps that
+** information.
+*/
+int luaT_callorderTM (lua_State *L, const TValue *p1, const TValue *p2,
+                      TMS event) {
+  if (callbinTM(L, p1, p2, L->top.p, event))  /* try original event */
+    return !l_isfalse(s2v(L->top.p));
+#if defined(LUA_COMPAT_LT_LE)
+  else if (event == TM_LE) {
+      /* try '!(p2 < p1)' for '(p1 <= p2)' */
+      L->ci->callstatus |= CIST_LEQ;  /* mark it is doing 'lt' for 'le' */
+      if (callbinTM(L, p2, p1, L->top.p, TM_LT)) {
+        L->ci->callstatus ^= CIST_LEQ;  /* clear mark */
+        return l_isfalse(s2v(L->top.p));
+      }
+      /* else error will remove this 'ci'; no need to clear mark */
+  }
+#endif
+  luaG_ordererror(L, p1, p2);  /* no metamethod found */
+  return 0;  /* to avoid warnings */
+}
+
+
+int luaT_callorderiTM (lua_State *L, const TValue *p1, int v2,
+                       int flip, int isfloat, TMS event) {
+  TValue aux; const TValue *p2;
+  if (isfloat) {
+    setfltvalue(&aux, cast_num(v2));
+  }
+  else
+    setivalue(&aux, v2);
+  if (flip) {  /* arguments were exchanged? */
+    p2 = p1; p1 = &aux;  /* correct them */
+  }
+  else
+    p2 = &aux;
+  return luaT_callorderTM(L, p1, p2, event);
+}
+
+
+void luaT_adjustvarargs (lua_State *L, int nfixparams, CallInfo *ci,
+                         const Proto *p) {
+  int i;
+  int actual = cast_int(L->top.p - ci->func.p) - 1;  /* number of arguments */
+  int nextra = actual - nfixparams;  /* number of extra arguments */
+  ci->u.l.nextraargs = nextra;
+  luaD_checkstack(L, p->maxstacksize + 1);
+  /* copy function to the top of the stack */
+  setobjs2s(L, L->top.p++, ci->func.p);
+  /* move fixed parameters to the top of the stack */
+  for (i = 1; i <= nfixparams; i++) {
+    setobjs2s(L, L->top.p++, ci->func.p + i);
+    setnilvalue(s2v(ci->func.p + i));  /* erase original parameter (for GC) */
+  }
+  ci->func.p += actual + 1;
+  ci->top.p += actual + 1;
+  lua_assert(L->top.p <= ci->top.p && ci->top.p <= L->stack_last.p);
+}
+
+
+void luaT_getvarargs (lua_State *L, CallInfo *ci, StkId where, int wanted) {
+  int i;
+  int nextra = ci->u.l.nextraargs;
+  if (wanted < 0) {
+    wanted = nextra;  /* get all extra arguments available */
+    checkstackGCp(L, nextra, where);  /* ensure stack space */
+    L->top.p = where + nextra;  /* next instruction will need top */
+  }
+  for (i = 0; i < wanted && i < nextra; i++)
+    setobjs2s(L, where + i, ci->func.p - nextra + i);
+  for (; i < wanted; i++)   /* complete required results with nil */
+    setnilvalue(s2v(where + i));
+}
+
@@ -0,0 +1,103 @@
+/*
+** $Id: ltm.h $
+** Tag methods
+** See Copyright Notice in lua.h
+*/
+
+#ifndef ltm_h
+#define ltm_h
+
+
+#include "lobject.h"
+
+
+/*
+* WARNING: if you change the order of this enumeration,
+* grep "ORDER TM" and "ORDER OP"
+*/
+typedef enum {
+  TM_INDEX,
+  TM_NEWINDEX,
+  TM_GC,
+  TM_MODE,
+  TM_LEN,
+  TM_EQ,  /* last tag method with fast access */
+  TM_ADD,
+  TM_SUB,
+  TM_MUL,
+  TM_MOD,
+  TM_POW,
+  TM_DIV,
+  TM_IDIV,
+  TM_BAND,
+  TM_BOR,
+  TM_BXOR,
+  TM_SHL,
+  TM_SHR,
+  TM_UNM,
+  TM_BNOT,
+  TM_LT,
+  TM_LE,
+  TM_CONCAT,
+  TM_CALL,
+  TM_CLOSE,
+  TM_N		/* number of elements in the enum */
+} TMS;
+
+
+/*
+** Mask with 1 in all fast-access methods. A 1 in any of these bits
+** in the flag of a (meta)table means the metatable does not have the
+** corresponding metamethod field. (Bit 7 of the flag is used for
+** 'isrealasize'.)
+*/
+#define maskflags	(~(~0u << (TM_EQ + 1)))
+
+
+/*
+** Test whether there is no tagmethod.
+** (Because tagmethods use raw accesses, the result may be an "empty" nil.)
+*/
+#define notm(tm)	ttisnil(tm)
+
+
+#define gfasttm(g,et,e) ((et) == NULL ? NULL : \
+  ((et)->flags & (1u<<(e))) ? NULL : luaT_gettm(et, e, (g)->tmname[e]))
+
+#define fasttm(l,et,e)	gfasttm(G(l), et, e)
+
+#define ttypename(x)	luaT_typenames_[(x) + 1]
+
+LUAI_DDEC(const char *const luaT_typenames_[LUA_TOTALTYPES];)
+
+
+LUAI_FUNC const char *luaT_objtypename (lua_State *L, const TValue *o);
+
+LUAI_FUNC const TValue *luaT_gettm (Table *events, TMS event, TString *ename);
+LUAI_FUNC const TValue *luaT_gettmbyobj (lua_State *L, const TValue *o,
+                                                       TMS event);
+LUAI_FUNC void luaT_init (lua_State *L);
+
+LUAI_FUNC void luaT_callTM (lua_State *L, const TValue *f, const TValue *p1,
+                            const TValue *p2, const TValue *p3);
+LUAI_FUNC void luaT_callTMres (lua_State *L, const TValue *f,
+                            const TValue *p1, const TValue *p2, StkId p3);
+LUAI_FUNC void luaT_trybinTM (lua_State *L, const TValue *p1, const TValue *p2,
+                              StkId res, TMS event);
+LUAI_FUNC void luaT_tryconcatTM (lua_State *L);
+LUAI_FUNC void luaT_trybinassocTM (lua_State *L, const TValue *p1,
+       const TValue *p2, int inv, StkId res, TMS event);
+LUAI_FUNC void luaT_trybiniTM (lua_State *L, const TValue *p1, lua_Integer i2,
+                               int inv, StkId res, TMS event);
+LUAI_FUNC int luaT_callorderTM (lua_State *L, const TValue *p1,
+                                const TValue *p2, TMS event);
+LUAI_FUNC int luaT_callorderiTM (lua_State *L, const TValue *p1, int v2,
+                                 int inv, int isfloat, TMS event);
+
+LUAI_FUNC void luaT_adjustvarargs (lua_State *L, int nfixparams,
+                                   struct CallInfo *ci, const Proto *p);
+LUAI_FUNC void luaT_getvarargs (lua_State *L, struct CallInfo *ci,
+                                              StkId where, int wanted);
+
+
+#endif
@@ -0,0 +1,523 @@
+/*
+** $Id: lua.h $
+** Lua - A Scripting Language
+** Lua.org, PUC-Rio, Brazil (http://www.lua.org)
+** See Copyright Notice at the end of this file
+*/
+
+
+#ifndef lua_h
+#define lua_h
+
+#include <stdarg.h>
+#include <stddef.h>
+
+
+#include "luaconf.h"
+
+
+#define LUA_VERSION_MAJOR	"5"
+#define LUA_VERSION_MINOR	"4"
+#define LUA_VERSION_RELEASE	"7"
+
+#define LUA_VERSION_NUM			504
+#define LUA_VERSION_RELEASE_NUM		(LUA_VERSION_NUM * 100 + 7)
+
+#define LUA_VERSION	"Lua " LUA_VERSION_MAJOR "." LUA_VERSION_MINOR
+#define LUA_RELEASE	LUA_VERSION "." LUA_VERSION_RELEASE
+#define LUA_COPYRIGHT	LUA_RELEASE "  Copyright (C) 1994-2024 Lua.org, PUC-Rio"
+#define LUA_AUTHORS	"R. Ierusalimschy, L. H. de Figueiredo, W. Celes"
+
+
+/* mark for precompiled code ('<esc>Lua') */
+#define LUA_SIGNATURE	"\x1bLua"
+
+/* option for multiple returns in 'lua_pcall' and 'lua_call' */
+#define LUA_MULTRET	(-1)
+
+
+/*
+** Pseudo-indices
+** (-LUAI_MAXSTACK is the minimum valid index; we keep some free empty
+** space after that to help overflow detection)
+*/
+#define LUA_REGISTRYINDEX	(-LUAI_MAXSTACK - 1000)
+#define lua_upvalueindex(i)	(LUA_REGISTRYINDEX - (i))
+
+
+/* thread status */
+#define LUA_OK		0
+#define LUA_YIELD	1
+#define LUA_ERRRUN	2
+#define LUA_ERRSYNTAX	3
+#define LUA_ERRMEM	4
+#define LUA_ERRERR	5
+
+
+typedef struct lua_State lua_State;
+
+
+/*
+** basic types
+*/
+#define LUA_TNONE		(-1)
+
+#define LUA_TNIL		0
+#define LUA_TBOOLEAN		1
+#define LUA_TLIGHTUSERDATA	2
+#define LUA_TNUMBER		3
+#define LUA_TSTRING		4
+#define LUA_TTABLE		5
+#define LUA_TFUNCTION		6
+#define LUA_TUSERDATA		7
+#define LUA_TTHREAD		8
+
+#define LUA_NUMTYPES		9
+
+
+
+/* minimum Lua stack available to a C function */
+#define LUA_MINSTACK	20
+
+
+/* predefined values in the registry */
+#define LUA_RIDX_MAINTHREAD	1
+#define LUA_RIDX_GLOBALS	2
+#define LUA_RIDX_LAST		LUA_RIDX_GLOBALS
+
+
+/* type of numbers in Lua */
+typedef LUA_NUMBER lua_Number;
+
+
+/* type for integer functions */
+typedef LUA_INTEGER lua_Integer;
+
+/* unsigned integer type */
+typedef LUA_UNSIGNED lua_Unsigned;
+
+/* type for continuation-function contexts */
+typedef LUA_KCONTEXT lua_KContext;
+
+
+/*
+** Type for C functions registered with Lua
+*/
+typedef int (*lua_CFunction) (lua_State *L);
+
+/*
+** Type for continuation functions
+*/
+typedef int (*lua_KFunction) (lua_State *L, int status, lua_KContext ctx);
+
+
+/*
+** Type for functions that read/write blocks when loading/dumping Lua chunks
+*/
+typedef const char * (*lua_Reader) (lua_State *L, void *ud, size_t *sz);
+
+typedef int (*lua_Writer) (lua_State *L, const void *p, size_t sz, void *ud);
+
+
+/*
+** Type for memory-allocation functions
+*/
+typedef void * (*lua_Alloc) (void *ud, void *ptr, size_t osize, size_t nsize);
+
+
+/*
+** Type for warning functions
+*/
+typedef void (*lua_WarnFunction) (void *ud, const char *msg, int tocont);
+
+
+/*
+** Type used by the debug API to collect debug information
+*/
+typedef struct lua_Debug lua_Debug;
+
+
+/*
+** Functions to be called by the debugger in specific events
+*/
+typedef void (*lua_Hook) (lua_State *L, lua_Debug *ar);
+
+
+/*
+** generic extra include file
+*/
+#if defined(LUA_USER_H)
+#include LUA_USER_H
+#endif
+
+
+/*
+** RCS ident string
+*/
+extern const char lua_ident[];
+
+
+/*
+** state manipulation
+*/
+LUA_API lua_State *(lua_newstate) (lua_Alloc f, void *ud);
+LUA_API void       (lua_close) (lua_State *L);
+LUA_API lua_State *(lua_newthread) (lua_State *L);
+LUA_API int        (lua_closethread) (lua_State *L, lua_State *from);
+LUA_API int        (lua_resetthread) (lua_State *L);  /* Deprecated! */
+
+LUA_API lua_CFunction (lua_atpanic) (lua_State *L, lua_CFunction panicf);
+
+
+LUA_API lua_Number (lua_version) (lua_State *L);
+
+
+/*
+** basic stack manipulation
+*/
+LUA_API int   (lua_absindex) (lua_State *L, int idx);
+LUA_API int   (lua_gettop) (lua_State *L);
+LUA_API void  (lua_settop) (lua_State *L, int idx);
+LUA_API void  (lua_pushvalue) (lua_State *L, int idx);
+LUA_API void  (lua_rotate) (lua_State *L, int idx, int n);
+LUA_API void  (lua_copy) (lua_State *L, int fromidx, int toidx);
+LUA_API int   (lua_checkstack) (lua_State *L, int n);
+
+LUA_API void  (lua_xmove) (lua_State *from, lua_State *to, int n);
+
+
+/*
+** access functions (stack -> C)
+*/
+
+LUA_API int             (lua_isnumber) (lua_State *L, int idx);
+LUA_API int             (lua_isstring) (lua_State *L, int idx);
+LUA_API int             (lua_iscfunction) (lua_State *L, int idx);
+LUA_API int             (lua_isinteger) (lua_State *L, int idx);
+LUA_API int             (lua_isuserdata) (lua_State *L, int idx);
+LUA_API int             (lua_type) (lua_State *L, int idx);
+LUA_API const char     *(lua_typename) (lua_State *L, int tp);
+
+LUA_API lua_Number      (lua_tonumberx) (lua_State *L, int idx, int *isnum);
+LUA_API lua_Integer     (lua_tointegerx) (lua_State *L, int idx, int *isnum);
+LUA_API int             (lua_toboolean) (lua_State *L, int idx);
+LUA_API const char     *(lua_tolstring) (lua_State *L, int idx, size_t *len);
+LUA_API lua_Unsigned    (lua_rawlen) (lua_State *L, int idx);
+LUA_API lua_CFunction   (lua_tocfunction) (lua_State *L, int idx);
+LUA_API void	       *(lua_touserdata) (lua_State *L, int idx);
+LUA_API lua_State      *(lua_tothread) (lua_State *L, int idx);
+LUA_API const void     *(lua_topointer) (lua_State *L, int idx);
+
+
+/*
+** Comparison and arithmetic functions
+*/
+
+#define LUA_OPADD	0	/* ORDER TM, ORDER OP */
+#define LUA_OPSUB	1
+#define LUA_OPMUL	2
+#define LUA_OPMOD	3
+#define LUA_OPPOW	4
+#define LUA_OPDIV	5
+#define LUA_OPIDIV	6
+#define LUA_OPBAND	7
+#define LUA_OPBOR	8
+#define LUA_OPBXOR	9
+#define LUA_OPSHL	10
+#define LUA_OPSHR	11
+#define LUA_OPUNM	12
+#define LUA_OPBNOT	13
+
+LUA_API void  (lua_arith) (lua_State *L, int op);
+
+#define LUA_OPEQ	0
+#define LUA_OPLT	1
+#define LUA_OPLE	2
+
+LUA_API int   (lua_rawequal) (lua_State *L, int idx1, int idx2);
+LUA_API int   (lua_compare) (lua_State *L, int idx1, int idx2, int op);
+
+
+/*
+** push functions (C -> stack)
+*/
+LUA_API void        (lua_pushnil) (lua_State *L);
+LUA_API void        (lua_pushnumber) (lua_State *L, lua_Number n);
+LUA_API void        (lua_pushinteger) (lua_State *L, lua_Integer n);
+LUA_API const char *(lua_pushlstring) (lua_State *L, const char *s, size_t len);
+LUA_API const char *(lua_pushstring) (lua_State *L, const char *s);
+LUA_API const char *(lua_pushvfstring) (lua_State *L, const char *fmt,
+                                                      va_list argp);
+LUA_API const char *(lua_pushfstring) (lua_State *L, const char *fmt, ...);
+LUA_API void  (lua_pushcclosure) (lua_State *L, lua_CFunction fn, int n);
+LUA_API void  (lua_pushboolean) (lua_State *L, int b);
+LUA_API void  (lua_pushlightuserdata) (lua_State *L, void *p);
+LUA_API int   (lua_pushthread) (lua_State *L);
+
+
+/*
+** get functions (Lua -> stack)
+*/
+LUA_API int (lua_getglobal) (lua_State *L, const char *name);
+LUA_API int (lua_gettable) (lua_State *L, int idx);
+LUA_API int (lua_getfield) (lua_State *L, int idx, const char *k);
+LUA_API int (lua_geti) (lua_State *L, int idx, lua_Integer n);
+LUA_API int (lua_rawget) (lua_State *L, int idx);
+LUA_API int (lua_rawgeti) (lua_State *L, int idx, lua_Integer n);
+LUA_API int (lua_rawgetp) (lua_State *L, int idx, const void *p);
+
+LUA_API void  (lua_createtable) (lua_State *L, int narr, int nrec);
+LUA_API void *(lua_newuserdatauv) (lua_State *L, size_t sz, int nuvalue);
+LUA_API int   (lua_getmetatable) (lua_State *L, int objindex);
+LUA_API int  (lua_getiuservalue) (lua_State *L, int idx, int n);
+
+
+/*
+** set functions (stack -> Lua)
+*/
+LUA_API void  (lua_setglobal) (lua_State *L, const char *name);
+LUA_API void  (lua_settable) (lua_State *L, int idx);
+LUA_API void  (lua_setfield) (lua_State *L, int idx, const char *k);
+LUA_API void  (lua_seti) (lua_State *L, int idx, lua_Integer n);
+LUA_API void  (lua_rawset) (lua_State *L, int idx);
+LUA_API void  (lua_rawseti) (lua_State *L, int idx, lua_Integer n);
+LUA_API void  (lua_rawsetp) (lua_State *L, int idx, const void *p);
+LUA_API int   (lua_setmetatable) (lua_State *L, int objindex);
+LUA_API int   (lua_setiuservalue) (lua_State *L, int idx, int n);
+
+
+/*
+** 'load' and 'call' functions (load and run Lua code)
+*/
+LUA_API void  (lua_callk) (lua_State *L, int nargs, int nresults,
+                           lua_KContext ctx, lua_KFunction k);
+#define lua_call(L,n,r)		lua_callk(L, (n), (r), 0, NULL)
+
+LUA_API int   (lua_pcallk) (lua_State *L, int nargs, int nresults, int errfunc,
+                            lua_KContext ctx, lua_KFunction k);
+#define lua_pcall(L,n,r,f)	lua_pcallk(L, (n), (r), (f), 0, NULL)
+
+LUA_API int   (lua_load) (lua_State *L, lua_Reader reader, void *dt,
+                          const char *chunkname, const char *mode);
+
+LUA_API int (lua_dump) (lua_State *L, lua_Writer writer, void *data, int strip);
+
+
+/*
+** coroutine functions
+*/
+LUA_API int  (lua_yieldk)     (lua_State *L, int nresults, lua_KContext ctx,
+                               lua_KFunction k);
+LUA_API int  (lua_resume)     (lua_State *L, lua_State *from, int narg,
+                               int *nres);
+LUA_API int  (lua_status)     (lua_State *L);
+LUA_API int (lua_isyieldable) (lua_State *L);
+
+#define lua_yield(L,n)		lua_yieldk(L, (n), 0, NULL)
+
+
+/*
+** Warning-related functions
+*/
+LUA_API void (lua_setwarnf) (lua_State *L, lua_WarnFunction f, void *ud);
+LUA_API void (lua_warning)  (lua_State *L, const char *msg, int tocont);
+
+
+/*
+** garbage-collection function and options
+*/
+
+#define LUA_GCSTOP		0
+#define LUA_GCRESTART		1
+#define LUA_GCCOLLECT		2
+#define LUA_GCCOUNT		3
+#define LUA_GCCOUNTB		4
+#define LUA_GCSTEP		5
+#define LUA_GCSETPAUSE		6
+#define LUA_GCSETSTEPMUL	7
+#define LUA_GCISRUNNING		9
+#define LUA_GCGEN		10
+#define LUA_GCINC		11
+
+LUA_API int (lua_gc) (lua_State *L, int what, ...);
+
+
+/*
+** miscellaneous functions
+*/
+
+LUA_API int   (lua_error) (lua_State *L);
+
+LUA_API int   (lua_next) (lua_State *L, int idx);
+
+LUA_API void  (lua_concat) (lua_State *L, int n);
+LUA_API void  (lua_len)    (lua_State *L, int idx);
+
+LUA_API size_t   (lua_stringtonumber) (lua_State *L, const char *s);
+
+LUA_API lua_Alloc (lua_getallocf) (lua_State *L, void **ud);
+LUA_API void      (lua_setallocf) (lua_State *L, lua_Alloc f, void *ud);
+
+LUA_API void (lua_toclose) (lua_State *L, int idx);
+LUA_API void (lua_closeslot) (lua_State *L, int idx);
+
+
+/*
+** {==============================================================
+** some useful macros
+** ===============================================================
+*/
+
+#define lua_getextraspace(L)	((void *)((char *)(L) - LUA_EXTRASPACE))
+
+#define lua_tonumber(L,i)	lua_tonumberx(L,(i),NULL)
+#define lua_tointeger(L,i)	lua_tointegerx(L,(i),NULL)
+
+#define lua_pop(L,n)		lua_settop(L, -(n)-1)
+
+#define lua_newtable(L)		lua_createtable(L, 0, 0)
+
+#define lua_register(L,n,f) (lua_pushcfunction(L, (f)), lua_setglobal(L, (n)))
+
+#define lua_pushcfunction(L,f)	lua_pushcclosure(L, (f), 0)
+
+#define lua_isfunction(L,n)	(lua_type(L, (n)) == LUA_TFUNCTION)
+#define lua_istable(L,n)	(lua_type(L, (n)) == LUA_TTABLE)
+#define lua_islightuserdata(L,n)	(lua_type(L, (n)) == LUA_TLIGHTUSERDATA)
+#define lua_isnil(L,n)		(lua_type(L, (n)) == LUA_TNIL)
+#define lua_isboolean(L,n)	(lua_type(L, (n)) == LUA_TBOOLEAN)
+#define lua_isthread(L,n)	(lua_type(L, (n)) == LUA_TTHREAD)
+#define lua_isnone(L,n)		(lua_type(L, (n)) == LUA_TNONE)
+#define lua_isnoneornil(L, n)	(lua_type(L, (n)) <= 0)
+
+#define lua_pushliteral(L, s)	lua_pushstring(L, "" s)
+
+#define lua_pushglobaltable(L)  \
+	((void)lua_rawgeti(L, LUA_REGISTRYINDEX, LUA_RIDX_GLOBALS))
+
+#define lua_tostring(L,i)	lua_tolstring(L, (i), NULL)
+
+
+#define lua_insert(L,idx)	lua_rotate(L, (idx), 1)
+
+#define lua_remove(L,idx)	(lua_rotate(L, (idx), -1), lua_pop(L, 1))
+
+#define lua_replace(L,idx)	(lua_copy(L, -1, (idx)), lua_pop(L, 1))
+
+/* }============================================================== */
+
+
+/*
+** {==============================================================
+** compatibility macros
+** ===============================================================
+*/
+#if defined(LUA_COMPAT_APIINTCASTS)
+
+#define lua_pushunsigned(L,n)	lua_pushinteger(L, (lua_Integer)(n))
+#define lua_tounsignedx(L,i,is)	((lua_Unsigned)lua_tointegerx(L,i,is))
+#define lua_tounsigned(L,i)	lua_tounsignedx(L,(i),NULL)
+
+#endif
+
+#define lua_newuserdata(L,s)	lua_newuserdatauv(L,s,1)
+#define lua_getuservalue(L,idx)	lua_getiuservalue(L,idx,1)
+#define lua_setuservalue(L,idx)	lua_setiuservalue(L,idx,1)
+
+#define LUA_NUMTAGS		LUA_NUMTYPES
+
+/* }============================================================== */
+
+/*
+** {======================================================================
+** Debug API
+** =======================================================================
+*/
+
+
+/*
+** Event codes
+*/
+#define LUA_HOOKCALL	0
+#define LUA_HOOKRET	1
+#define LUA_HOOKLINE	2
+#define LUA_HOOKCOUNT	3
+#define LUA_HOOKTAILCALL 4
+
+
+/*
+** Event masks
+*/
+#define LUA_MASKCALL	(1 << LUA_HOOKCALL)
+#define LUA_MASKRET	(1 << LUA_HOOKRET)
+#define LUA_MASKLINE	(1 << LUA_HOOKLINE)
+#define LUA_MASKCOUNT	(1 << LUA_HOOKCOUNT)
+
+
+LUA_API int (lua_getstack) (lua_State *L, int level, lua_Debug *ar);
+LUA_API int (lua_getinfo) (lua_State *L, const char *what, lua_Debug *ar);
+LUA_API const char *(lua_getlocal) (lua_State *L, const lua_Debug *ar, int n);
+LUA_API const char *(lua_setlocal) (lua_State *L, const lua_Debug *ar, int n);
+LUA_API const char *(lua_getupvalue) (lua_State *L, int funcindex, int n);
+LUA_API const char *(lua_setupvalue) (lua_State *L, int funcindex, int n);
+
+LUA_API void *(lua_upvalueid) (lua_State *L, int fidx, int n);
+LUA_API void  (lua_upvaluejoin) (lua_State *L, int fidx1, int n1,
+                                               int fidx2, int n2);
+
+LUA_API void (lua_sethook) (lua_State *L, lua_Hook func, int mask, int count);
+LUA_API lua_Hook (lua_gethook) (lua_State *L);
+LUA_API int (lua_gethookmask) (lua_State *L);
+LUA_API int (lua_gethookcount) (lua_State *L);
+
+LUA_API int (lua_setcstacklimit) (lua_State *L, unsigned int limit);
+
+struct lua_Debug {
+  int event;
+  const char *name;	/* (n) */
+  const char *namewhat;	/* (n) 'global', 'local', 'field', 'method' */
+  const char *what;	/* (S) 'Lua', 'C', 'main', 'tail' */
+  const char *source;	/* (S) */
+  size_t srclen;	/* (S) */
+  int currentline;	/* (l) */
+  int linedefined;	/* (S) */
+  int lastlinedefined;	/* (S) */
+  unsigned char nups;	/* (u) number of upvalues */
+  unsigned char nparams;/* (u) number of parameters */
+  char isvararg;        /* (u) */
+  char istailcall;	/* (t) */
+  unsigned short ftransfer;   /* (r) index of first value transferred */
+  unsigned short ntransfer;   /* (r) number of transferred values */
+  char short_src[LUA_IDSIZE]; /* (S) */
+  /* private part */
+  struct CallInfo *i_ci;  /* active function */
+};
+
+/* }====================================================================== */
+
+
+/******************************************************************************
+* Copyright (C) 1994-2024 Lua.org, PUC-Rio.
+*
+* Permission is hereby granted, free of charge, to any person obtaining
+* a copy of this software and associated documentation files (the
+* "Software"), to deal in the Software without restriction, including
+* without limitation the rights to use, copy, modify, merge, publish,
+* distribute, sublicense, and/or sell copies of the Software, and to
+* permit persons to whom the Software is furnished to do so, subject to
+* the following conditions:
+*
+* The above copyright notice and this permission notice shall be
+* included in all copies or substantial portions of the Software.
+*
+* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
+* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
+* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
+* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
+* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+******************************************************************************/
+
+
+#endif
@@ -0,0 +1,802 @@
+/*
+** $Id: luaconf.h $
+** Configuration file for Lua
+** See Copyright Notice in lua.h
+*/
+
+
+#ifndef luaconf_h
+#define luaconf_h
+
+#include <limits.h>
+#include <stddef.h>
+
+
+/*
+** ===================================================================
+** General Configuration File for Lua
+**
+** Some definitions here can be changed externally, through the compiler
+** (e.g., with '-D' options): They are commented out or protected
+** by '#if !defined' guards. However, several other definitions
+** should be changed directly here, either because they affect the
+** Lua ABI (by making the changes here, you ensure that all software
+** connected to Lua, such as C libraries, will be compiled with the same
+** configuration); or because they are seldom changed.
+**
+** Search for "@@" to find all configurable definitions.
+** ===================================================================
+*/
+
+
+/*
+** {====================================================================
+** System Configuration: macros to adapt (if needed) Lua to some
+** particular platform, for instance restricting it to C89.
+** =====================================================================
+*/
+
+/*
+@@ LUA_USE_C89 controls the use of non-ISO-C89 features.
+** Define it if you want Lua to avoid the use of a few C99 features
+** or Windows-specific features on Windows.
+*/
+/* #define LUA_USE_C89 */
+
+
+/*
+** By default, Lua on Windows use (some) specific Windows features
+*/
+#if !defined(LUA_USE_C89) && defined(_WIN32) && !defined(_WIN32_WCE)
+#define LUA_USE_WINDOWS  /* enable goodies for regular Windows */
+#endif
+
+
+#if defined(LUA_USE_WINDOWS)
+#define LUA_DL_DLL	/* enable support for DLL */
+#define LUA_USE_C89	/* broadly, Windows is C89 */
+#endif
+
+
+#if defined(LUA_USE_LINUX)
+#define LUA_USE_POSIX
+#define LUA_USE_DLOPEN		/* needs an extra library: -ldl */
+#endif
+
+
+#if defined(LUA_USE_MACOSX)
+#define LUA_USE_POSIX
+#define LUA_USE_DLOPEN		/* MacOS does not need -ldl */
+#endif
+
+
+#if defined(LUA_USE_IOS)
+#define LUA_USE_POSIX
+#define LUA_USE_DLOPEN
+#endif
+
+
+/*
+@@ LUAI_IS32INT is true iff 'int' has (at least) 32 bits.
+*/
+#define LUAI_IS32INT	((UINT_MAX >> 30) >= 3)
+
+/* }================================================================== */
+
+
+
+/*
+** {==================================================================
+** Configuration for Number types. These options should not be
+** set externally, because any other code connected to Lua must
+** use the same configuration.
+** ===================================================================
+*/
+
+/*
+@@ LUA_INT_TYPE defines the type for Lua integers.
+@@ LUA_FLOAT_TYPE defines the type for Lua floats.
+** Lua should work fine with any mix of these options supported
+** by your C compiler. The usual configurations are 64-bit integers
+** and 'double' (the default), 32-bit integers and 'float' (for
+** restricted platforms), and 'long'/'double' (for C compilers not
+** compliant with C99, which may not have support for 'long long').
+*/
+
+/* predefined options for LUA_INT_TYPE */
+#define LUA_INT_INT		1
+#define LUA_INT_LONG		2
+#define LUA_INT_LONGLONG	3
+
+/* predefined options for LUA_FLOAT_TYPE */
+#define LUA_FLOAT_FLOAT		1
+#define LUA_FLOAT_DOUBLE	2
+#define LUA_FLOAT_LONGDOUBLE	3
+
+
+/* Default configuration ('long long' and 'double', for 64-bit Lua) */
+#define LUA_INT_DEFAULT		LUA_INT_LONGLONG
+#define LUA_FLOAT_DEFAULT	LUA_FLOAT_DOUBLE
+
+
+/*
+@@ LUA_32BITS enables Lua with 32-bit integers and 32-bit floats.
+*/
+#define LUA_32BITS	0
+
+
+/*
+@@ LUA_C89_NUMBERS ensures that Lua uses the largest types available for
+** C89 ('long' and 'double'); Windows always has '__int64', so it does
+** not need to use this case.
+*/
+#if defined(LUA_USE_C89) && !defined(LUA_USE_WINDOWS)
+#define LUA_C89_NUMBERS		1
+#else
+#define LUA_C89_NUMBERS		0
+#endif
+
+
+#if LUA_32BITS		/* { */
+/*
+** 32-bit integers and 'float'
+*/
+#if LUAI_IS32INT  /* use 'int' if big enough */
+#define LUA_INT_TYPE	LUA_INT_INT
+#else  /* otherwise use 'long' */
+#define LUA_INT_TYPE	LUA_INT_LONG
+#endif
+#define LUA_FLOAT_TYPE	LUA_FLOAT_FLOAT
+
+#elif LUA_C89_NUMBERS	/* }{ */
+/*
+** largest types available for C89 ('long' and 'double')
+*/
+#define LUA_INT_TYPE	LUA_INT_LONG
+#define LUA_FLOAT_TYPE	LUA_FLOAT_DOUBLE
+
+#else		/* }{ */
+/* use defaults */
+
+#define LUA_INT_TYPE	LUA_INT_DEFAULT
+#define LUA_FLOAT_TYPE	LUA_FLOAT_DEFAULT
+
+#endif				/* } */
+
+
+/* }================================================================== */
+
+
+
+/*
+** {==================================================================
+** Configuration for Paths.
+** ===================================================================
+*/
+
+/*
+** LUA_PATH_SEP is the character that separates templates in a path.
+** LUA_PATH_MARK is the string that marks the substitution points in a
+** template.
+** LUA_EXEC_DIR in a Windows path is replaced by the executable's
+** directory.
+*/
+#define LUA_PATH_SEP            ";"
+#define LUA_PATH_MARK           "?"
+#define LUA_EXEC_DIR            "!"
+
+
+/*
+@@ LUA_PATH_DEFAULT is the default path that Lua uses to look for
+** Lua libraries.
+@@ LUA_CPATH_DEFAULT is the default path that Lua uses to look for
+** C libraries.
+** CHANGE them if your machine has a non-conventional directory
+** hierarchy or if you want to install your libraries in
+** non-conventional directories.
+*/
+
+#define LUA_VDIR	LUA_VERSION_MAJOR "." LUA_VERSION_MINOR
+#if defined(_WIN32)	/* { */
+/*
+** In Windows, any exclamation mark ('!') in the path is replaced by the
+** path of the directory of the executable file of the current process.
+*/
+#define LUA_LDIR	"!\\lua\\"
+#define LUA_CDIR	"!\\"
+#define LUA_SHRDIR	"!\\..\\share\\lua\\" LUA_VDIR "\\"
+
+#if !defined(LUA_PATH_DEFAULT)
+#define LUA_PATH_DEFAULT  \
+		LUA_LDIR"?.lua;"  LUA_LDIR"?\\init.lua;" \
+		LUA_CDIR"?.lua;"  LUA_CDIR"?\\init.lua;" \
+		LUA_SHRDIR"?.lua;" LUA_SHRDIR"?\\init.lua;" \
+		".\\?.lua;" ".\\?\\init.lua"
+#endif
+
+#if !defined(LUA_CPATH_DEFAULT)
+#define LUA_CPATH_DEFAULT \
+		LUA_CDIR"?.dll;" \
+		LUA_CDIR"..\\lib\\lua\\" LUA_VDIR "\\?.dll;" \
+		LUA_CDIR"loadall.dll;" ".\\?.dll"
+#endif
+
+#else			/* }{ */
+
+#define LUA_ROOT	"/usr/local/"
+#define LUA_LDIR	LUA_ROOT "share/lua/" LUA_VDIR "/"
+#define LUA_CDIR	LUA_ROOT "lib/lua/" LUA_VDIR "/"
+
+#if !defined(LUA_PATH_DEFAULT)
+#define LUA_PATH_DEFAULT  \
+		LUA_LDIR"?.lua;"  LUA_LDIR"?/init.lua;" \
+		LUA_CDIR"?.lua;"  LUA_CDIR"?/init.lua;" \
+		"./?.lua;" "./?/init.lua"
+#endif
+
+#if !defined(LUA_CPATH_DEFAULT)
+#define LUA_CPATH_DEFAULT \
+		LUA_CDIR"?.so;" LUA_CDIR"loadall.so;" "./?.so"
+#endif
+
+#endif			/* } */
+
+
+/*
+@@ LUA_DIRSEP is the directory separator (for submodules).
+** CHANGE it if your machine does not use "/" as the directory separator
+** and is not Windows. (On Windows Lua automatically uses "\".)
+*/
+#if !defined(LUA_DIRSEP)
+
+#if defined(_WIN32)
+#define LUA_DIRSEP	"\\"
+#else
+#define LUA_DIRSEP	"/"
+#endif
+
+#endif
+
+
+/*
+** LUA_IGMARK is a mark to ignore all after it when building the
+** module name (e.g., used to build the luaopen_ function name).
+** Typically, the suffix after the mark is the module version,
+** as in "mod-v1.2.so".
+*/
+#define LUA_IGMARK		"-"
+
+/* }================================================================== */
+
+
+/*
+** {==================================================================
+** Marks for exported symbols in the C code
+** ===================================================================
+*/
+
+/*
+@@ LUA_API is a mark for all core API functions.
+@@ LUALIB_API is a mark for all auxiliary library functions.
+@@ LUAMOD_API is a mark for all standard library opening functions.
+** CHANGE them if you need to define those functions in some special way.
+** For instance, if you want to create one Windows DLL with the core and
+** the libraries, you may want to use the following definition (define
+** LUA_BUILD_AS_DLL to get it).
+*/
+#if defined(LUA_BUILD_AS_DLL)	/* { */
+
+#if defined(LUA_CORE) || defined(LUA_LIB)	/* { */
+#define LUA_API __declspec(dllexport)
+#else						/* }{ */
+#define LUA_API __declspec(dllimport)
+#endif						/* } */
+
+#else				/* }{ */
+
+#define LUA_API		extern
+
+#endif				/* } */
+
+
+/*
+** More often than not the libs go together with the core.
+*/
+#define LUALIB_API	LUA_API
+#define LUAMOD_API	LUA_API
+
+
+/*
+@@ LUAI_FUNC is a mark for all extern functions that are not to be
+** exported to outside modules.
+@@ LUAI_DDEF and LUAI_DDEC are marks for all extern (const) variables,
+** none of which to be exported to outside modules (LUAI_DDEF for
+** definitions and LUAI_DDEC for declarations).
+** CHANGE them if you need to mark them in some special way. Elf/gcc
+** (versions 3.2 and later) mark them as "hidden" to optimize access
+** when Lua is compiled as a shared library. Not all elf targets support
+** this attribute. Unfortunately, gcc does not offer a way to check
+** whether the target offers that support, and those without support
+** give a warning about it. To avoid these warnings, change to the
+** default definition.
+*/
+#if defined(__GNUC__) && ((__GNUC__*100 + __GNUC_MINOR__) >= 302) && \
+    defined(__ELF__)		/* { */
+#define LUAI_FUNC	__attribute__((visibility("internal"))) extern
+#else				/* }{ */
+#define LUAI_FUNC	extern
+#endif				/* } */
+
+#define LUAI_DDEC(dec)	LUAI_FUNC dec
+#define LUAI_DDEF	/* empty */
+
+/* }================================================================== */
+
+
+/*
+** {==================================================================
+** Compatibility with previous versions
+** ===================================================================
+*/
+
+/*
+@@ LUA_COMPAT_5_3 controls other macros for compatibility with Lua 5.3.
+** You can define it to get all options, or change specific options
+** to fit your specific needs.
+*/
+#if defined(LUA_COMPAT_5_3)	/* { */
+
+/*
+@@ LUA_COMPAT_MATHLIB controls the presence of several deprecated
+** functions in the mathematical library.
+** (These functions were already officially removed in 5.3;
+** nevertheless they are still available here.)
+*/
+#define LUA_COMPAT_MATHLIB
+
+/*
+@@ LUA_COMPAT_APIINTCASTS controls the presence of macros for
+** manipulating other integer types (lua_pushunsigned, lua_tounsigned,
+** luaL_checkint, luaL_checklong, etc.)
+** (These macros were also officially removed in 5.3, but they are still
+** available here.)
+*/
+#define LUA_COMPAT_APIINTCASTS
+
+
+/*
+@@ LUA_COMPAT_LT_LE controls the emulation of the '__le' metamethod
+** using '__lt'.
+*/
+#define LUA_COMPAT_LT_LE
+
+
+/*
+@@ The following macros supply trivial compatibility for some
+** changes in the API. The macros themselves document how to
+** change your code to avoid using them.
+** (Once more, these macros were officially removed in 5.3, but they are
+** still available here.)
+*/
+#define lua_strlen(L,i)		lua_rawlen(L, (i))
+
+#define lua_objlen(L,i)		lua_rawlen(L, (i))
+
+#define lua_equal(L,idx1,idx2)		lua_compare(L,(idx1),(idx2),LUA_OPEQ)
+#define lua_lessthan(L,idx1,idx2)	lua_compare(L,(idx1),(idx2),LUA_OPLT)
+
+#endif				/* } */
+
+/* }================================================================== */
+
+
+
+/*
+** {==================================================================
+** Configuration for Numbers (low-level part).
+** Change these definitions if no predefined LUA_FLOAT_* / LUA_INT_*
+** satisfy your needs.
+** ===================================================================
+*/
+
+/*
+@@ LUAI_UACNUMBER is the result of a 'default argument promotion'
+@@ over a floating number.
+@@ l_floatatt(x) corrects float attribute 'x' to the proper float type
+** by prefixing it with one of FLT/DBL/LDBL.
+@@ LUA_NUMBER_FRMLEN is the length modifier for writing floats.
+@@ LUA_NUMBER_FMT is the format for writing floats.
+@@ lua_number2str converts a float to a string.
+@@ l_mathop allows the addition of an 'l' or 'f' to all math operations.
+@@ l_floor takes the floor of a float.
+@@ lua_str2number converts a decimal numeral to a number.
+*/
+
+
+/* The following definitions are good for most cases here */
+
+#define l_floor(x)		(l_mathop(floor)(x))
+
+#define lua_number2str(s,sz,n)  \
+	l_sprintf((s), sz, LUA_NUMBER_FMT, (LUAI_UACNUMBER)(n))
+
+/*
+@@ lua_numbertointeger converts a float number with an integral value
+** to an integer, or returns 0 if float is not within the range of
+** a lua_Integer.  (The range comparisons are tricky because of
+** rounding. The tests here assume a two-complement representation,
+** where MININTEGER always has an exact representation as a float;
+** MAXINTEGER may not have one, and therefore its conversion to float
+** may have an ill-defined value.)
+*/
+#define lua_numbertointeger(n,p) \
+  ((n) >= (LUA_NUMBER)(LUA_MININTEGER) && \
+   (n) < -(LUA_NUMBER)(LUA_MININTEGER) && \
+      (*(p) = (LUA_INTEGER)(n), 1))
+
+
+/* now the variable definitions */
+
+#if LUA_FLOAT_TYPE == LUA_FLOAT_FLOAT		/* { single float */
+
+#define LUA_NUMBER	float
+
+#define l_floatatt(n)		(FLT_##n)
+
+#define LUAI_UACNUMBER	double
+
+#define LUA_NUMBER_FRMLEN	""
+#define LUA_NUMBER_FMT		"%.7g"
+
+#define l_mathop(op)		op##f
+
+#define lua_str2number(s,p)	strtof((s), (p))
+
+
+#elif LUA_FLOAT_TYPE == LUA_FLOAT_LONGDOUBLE	/* }{ long double */
+
+#define LUA_NUMBER	long double
+
+#define l_floatatt(n)		(LDBL_##n)
+
+#define LUAI_UACNUMBER	long double
+
+#define LUA_NUMBER_FRMLEN	"L"
+#define LUA_NUMBER_FMT		"%.19Lg"
+
+#define l_mathop(op)		op##l
+
+#define lua_str2number(s,p)	strtold((s), (p))
+
+#elif LUA_FLOAT_TYPE == LUA_FLOAT_DOUBLE	/* }{ double */
+
+#define LUA_NUMBER	double
+
+#define l_floatatt(n)		(DBL_##n)
+
+#define LUAI_UACNUMBER	double
+
+#define LUA_NUMBER_FRMLEN	""
+#define LUA_NUMBER_FMT		"%.14g"
+
+#define l_mathop(op)		op
+
+#define lua_str2number(s,p)	strtod((s), (p))
+
+#else						/* }{ */
+
+#error "numeric float type not defined"
+
+#endif					/* } */
+
+
+
+/*
+@@ LUA_UNSIGNED is the unsigned version of LUA_INTEGER.
+@@ LUAI_UACINT is the result of a 'default argument promotion'
+@@ over a LUA_INTEGER.
+@@ LUA_INTEGER_FRMLEN is the length modifier for reading/writing integers.
+@@ LUA_INTEGER_FMT is the format for writing integers.
+@@ LUA_MAXINTEGER is the maximum value for a LUA_INTEGER.
+@@ LUA_MININTEGER is the minimum value for a LUA_INTEGER.
+@@ LUA_MAXUNSIGNED is the maximum value for a LUA_UNSIGNED.
+@@ lua_integer2str converts an integer to a string.
+*/
+
+
+/* The following definitions are good for most cases here */
+
+#define LUA_INTEGER_FMT		"%" LUA_INTEGER_FRMLEN "d"
+
+#define LUAI_UACINT		LUA_INTEGER
+
+#define lua_integer2str(s,sz,n)  \
+	l_sprintf((s), sz, LUA_INTEGER_FMT, (LUAI_UACINT)(n))
+
+/*
+** use LUAI_UACINT here to avoid problems with promotions (which
+** can turn a comparison between unsigneds into a signed comparison)
+*/
+#define LUA_UNSIGNED		unsigned LUAI_UACINT
+
+
+/* now the variable definitions */
+
+#if LUA_INT_TYPE == LUA_INT_INT		/* { int */
+
+#define LUA_INTEGER		int
+#define LUA_INTEGER_FRMLEN	""
+
+#define LUA_MAXINTEGER		INT_MAX
+#define LUA_MININTEGER		INT_MIN
+
+#define LUA_MAXUNSIGNED		UINT_MAX
+
+#elif LUA_INT_TYPE == LUA_INT_LONG	/* }{ long */
+
+#define LUA_INTEGER		long
+#define LUA_INTEGER_FRMLEN	"l"
+
+#define LUA_MAXINTEGER		LONG_MAX
+#define LUA_MININTEGER		LONG_MIN
+
+#define LUA_MAXUNSIGNED		ULONG_MAX
+
+#elif LUA_INT_TYPE == LUA_INT_LONGLONG	/* }{ long long */
+
+/* use presence of macro LLONG_MAX as proxy for C99 compliance */
+#if defined(LLONG_MAX)		/* { */
+/* use ISO C99 stuff */
+
+#define LUA_INTEGER		long long
+#define LUA_INTEGER_FRMLEN	"ll"
+
+#define LUA_MAXINTEGER		LLONG_MAX
+#define LUA_MININTEGER		LLONG_MIN
+
+#define LUA_MAXUNSIGNED		ULLONG_MAX
+
+#elif defined(LUA_USE_WINDOWS) /* }{ */
+/* in Windows, can use specific Windows types */
+
+#define LUA_INTEGER		__int64
+#define LUA_INTEGER_FRMLEN	"I64"
+
+#define LUA_MAXINTEGER		_I64_MAX
+#define LUA_MININTEGER		_I64_MIN
+
+#define LUA_MAXUNSIGNED		_UI64_MAX
+
+#else				/* }{ */
+
+#error "Compiler does not support 'long long'. Use option '-DLUA_32BITS' \
+  or '-DLUA_C89_NUMBERS' (see file 'luaconf.h' for details)"
+
+#endif				/* } */
+
+#else				/* }{ */
+
+#error "numeric integer type not defined"
+
+#endif				/* } */
+
+/* }================================================================== */
+
+
+/*
+** {==================================================================
+** Dependencies with C99 and other C details
+** ===================================================================
+*/
+
+/*
+@@ l_sprintf is equivalent to 'snprintf' or 'sprintf' in C89.
+** (All uses in Lua have only one format item.)
+*/
+#if !defined(LUA_USE_C89)
+#define l_sprintf(s,sz,f,i)	snprintf(s,sz,f,i)
+#else
+#define l_sprintf(s,sz,f,i)	((void)(sz), sprintf(s,f,i))
+#endif
+
+
+/*
+@@ lua_strx2number converts a hexadecimal numeral to a number.
+** In C99, 'strtod' does that conversion. Otherwise, you can
+** leave 'lua_strx2number' undefined and Lua will provide its own
+** implementation.
+*/
+#if !defined(LUA_USE_C89)
+#define lua_strx2number(s,p)		lua_str2number(s,p)
+#endif
+
+
+/*
+@@ lua_pointer2str converts a pointer to a readable string in a
+** non-specified way.
+*/
+#define lua_pointer2str(buff,sz,p)	l_sprintf(buff,sz,"%p",p)
+
+
+/*
+@@ lua_number2strx converts a float to a hexadecimal numeral.
+** In C99, 'sprintf' (with format specifiers '%a'/'%A') does that.
+** Otherwise, you can leave 'lua_number2strx' undefined and Lua will
+** provide its own implementation.
+*/
+#if !defined(LUA_USE_C89)
+#define lua_number2strx(L,b,sz,f,n)  \
+	((void)L, l_sprintf(b,sz,f,(LUAI_UACNUMBER)(n)))
+#endif
+
+
+/*
+** 'strtof' and 'opf' variants for math functions are not valid in
+** C89. Otherwise, the macro 'HUGE_VALF' is a good proxy for testing the
+** availability of these variants. ('math.h' is already included in
+** all files that use these macros.)
+*/
+#if defined(LUA_USE_C89) || (defined(HUGE_VAL) && !defined(HUGE_VALF))
+#undef l_mathop  /* variants not available */
+#undef lua_str2number
+#define l_mathop(op)		(lua_Number)op  /* no variant */
+#define lua_str2number(s,p)	((lua_Number)strtod((s), (p)))
+#endif
+
+
+/*
+@@ LUA_KCONTEXT is the type of the context ('ctx') for continuation
+** functions.  It must be a numerical type; Lua will use 'intptr_t' if
+** available, otherwise it will use 'ptrdiff_t' (the nearest thing to
+** 'intptr_t' in C89)
+*/
+#define LUA_KCONTEXT	ptrdiff_t
+
+#if !defined(LUA_USE_C89) && defined(__STDC_VERSION__) && \
+    __STDC_VERSION__ >= 199901L
+#include <stdint.h>
+#if defined(INTPTR_MAX)  /* even in C99 this type is optional */
+#undef LUA_KCONTEXT
+#define LUA_KCONTEXT	intptr_t
+#endif
+#endif
+
+
+/*
+@@ lua_getlocaledecpoint gets the locale "radix character" (decimal point).
+** Change that if you do not want to use C locales. (Code using this
+** macro must include the header 'locale.h'.)
+*/
+#if !defined(lua_getlocaledecpoint)
+#define lua_getlocaledecpoint()		(localeconv()->decimal_point[0])
+#endif
+
+
+/*
+** macros to improve jump prediction, used mostly for error handling
+** and debug facilities. (Some macros in the Lua API use these macros.
+** Define LUA_NOBUILTIN if you do not want '__builtin_expect' in your
+** code.)
+*/
+#if !defined(luai_likely)
+
+#if defined(__GNUC__) && !defined(LUA_NOBUILTIN)
+#define luai_likely(x)		(__builtin_expect(((x) != 0), 1))
+#define luai_unlikely(x)	(__builtin_expect(((x) != 0), 0))
+#else
+#define luai_likely(x)		(x)
+#define luai_unlikely(x)	(x)
+#endif
+
+#endif
+
+
+#if defined(LUA_CORE) || defined(LUA_LIB)
+/* shorter names for Lua's own use */
+#define l_likely(x)	luai_likely(x)
+#define l_unlikely(x)	luai_unlikely(x)
+#endif
+
+
+
+/* }================================================================== */
+
+
+/*
+** {==================================================================
+** Language Variations
+** =====================================================================
+*/
+
+/*
+@@ LUA_NOCVTN2S/LUA_NOCVTS2N control how Lua performs some
+** coercions. Define LUA_NOCVTN2S to turn off automatic coercion from
+** numbers to strings. Define LUA_NOCVTS2N to turn off automatic
+** coercion from strings to numbers.
+*/
+/* #define LUA_NOCVTN2S */
+/* #define LUA_NOCVTS2N */
+
+
+/*
+@@ LUA_USE_APICHECK turns on several consistency checks on the C API.
+** Define it as a help when debugging C code.
+*/
+#if defined(LUA_USE_APICHECK)
+#include <assert.h>
+#define luai_apicheck(l,e)	assert(e)
+#endif
+
+/* }================================================================== */
+
+
+/*
+** {==================================================================
+** Macros that affect the API and must be stable (that is, must be the
+** same when you compile Lua and when you compile code that links to
+** Lua).
+** =====================================================================
+*/
+
+/*
+@@ LUAI_MAXSTACK limits the size of the Lua stack.
+** CHANGE it if you need a different limit. This limit is arbitrary;
+** its only purpose is to stop Lua from consuming unlimited stack
+** space (and to reserve some numbers for pseudo-indices).
+** (It must fit into max(size_t)/32 and max(int)/2.)
+*/
+#if LUAI_IS32INT
+#define LUAI_MAXSTACK		1000000
+#else
+#define LUAI_MAXSTACK		15000
+#endif
+
+
+/*
+@@ LUA_EXTRASPACE defines the size of a raw memory area associated with
+** a Lua state with very fast access.
+** CHANGE it if you need a different size.
+*/
+#define LUA_EXTRASPACE		(sizeof(void *))
+
+
+/*
+@@ LUA_IDSIZE gives the maximum size for the description of the source
+** of a function in debug information.
+** CHANGE it if you want a different size.
+*/
+#define LUA_IDSIZE	60
+
+
+/*
+@@ LUAL_BUFFERSIZE is the initial buffer size used by the lauxlib
+** buffer system.
+*/
+#define LUAL_BUFFERSIZE   ((int)(16 * sizeof(void*) * sizeof(lua_Number)))
+
+
+/*
+@@ LUAI_MAXALIGN defines fields that, when used in a union, ensure
+** maximum alignment for the other items in that union.
+*/
+#define LUAI_MAXALIGN  lua_Number n; double u; void *s; lua_Integer i; long l
+
+/* }================================================================== */
+
+
+
+
+
+/* =================================================================== */
+
+/*
+** Local configuration. You can use this space to add your redefinitions
+** without modifying the main part of the file.
+*/
+
+
+
+
+
+#endif
+
@@ -0,0 +1,52 @@
+/*
+** $Id: lualib.h $
+** Lua standard libraries
+** See Copyright Notice in lua.h
+*/
+
+
+#ifndef lualib_h
+#define lualib_h
+
+#include "lua.h"
+
+
+/* version suffix for environment variable names */
+#define LUA_VERSUFFIX          "_" LUA_VERSION_MAJOR "_" LUA_VERSION_MINOR
+
+
+LUAMOD_API int (luaopen_base) (lua_State *L);
+
+#define LUA_COLIBNAME	"coroutine"
+LUAMOD_API int (luaopen_coroutine) (lua_State *L);
+
+#define LUA_TABLIBNAME	"table"
+LUAMOD_API int (luaopen_table) (lua_State *L);
+
+#define LUA_IOLIBNAME	"io"
+LUAMOD_API int (luaopen_io) (lua_State *L);
+
+#define LUA_OSLIBNAME	"os"
+LUAMOD_API int (luaopen_os) (lua_State *L);
+
+#define LUA_STRLIBNAME	"string"
+LUAMOD_API int (luaopen_string) (lua_State *L);
+
+#define LUA_UTF8LIBNAME	"utf8"
+LUAMOD_API int (luaopen_utf8) (lua_State *L);
+
+#define LUA_MATHLIBNAME	"math"
+LUAMOD_API int (luaopen_math) (lua_State *L);
+
+#define LUA_DBLIBNAME	"debug"
+LUAMOD_API int (luaopen_debug) (lua_State *L);
+
+#define LUA_LOADLIBNAME	"package"
+LUAMOD_API int (luaopen_package) (lua_State *L);
+
+
+/* open all previous libraries */
+LUALIB_API void (luaL_openlibs) (lua_State *L);
+
+
+#endif
@@ -0,0 +1,335 @@
+/*
+** $Id: lundump.c $
+** load precompiled Lua chunks
+** See Copyright Notice in lua.h
+*/
+
+#define lundump_c
+#define LUA_CORE
+
+#include "lprefix.h"
+
+
+#include <limits.h>
+#include <string.h>
+
+#include "lua.h"
+
+#include "ldebug.h"
+#include "ldo.h"
+#include "lfunc.h"
+#include "lmem.h"
+#include "lobject.h"
+#include "lstring.h"
+#include "lundump.h"
+#include "lzio.h"
+
+
+#if !defined(luai_verifycode)
+#define luai_verifycode(L,f)  /* empty */
+#endif
+
+
+typedef struct {
+  lua_State *L;
+  ZIO *Z;
+  const char *name;
+} LoadState;
+
+
+static l_noret error (LoadState *S, const char *why) {
+  luaO_pushfstring(S->L, "%s: bad binary format (%s)", S->name, why);
+  luaD_throw(S->L, LUA_ERRSYNTAX);
+}
+
+
+/*
+** All high-level loads go through loadVector; you can change it to
+** adapt to the endianness of the input
+*/
+#define loadVector(S,b,n)	loadBlock(S,b,(n)*sizeof((b)[0]))
+
+static void loadBlock (LoadState *S, void *b, size_t size) {
+  if (luaZ_read(S->Z, b, size) != 0)
+    error(S, "truncated chunk");
+}
+
+
+#define loadVar(S,x)		loadVector(S,&x,1)
+
+
+static lu_byte loadByte (LoadState *S) {
+  int b = zgetc(S->Z);
+  if (b == EOZ)
+    error(S, "truncated chunk");
+  return cast_byte(b);
+}
+
+
+static size_t loadUnsigned (LoadState *S, size_t limit) {
+  size_t x = 0;
+  int b;
+  limit >>= 7;
+  do {
+    b = loadByte(S);
+    if (x >= limit)
+      error(S, "integer overflow");
+    x = (x << 7) | (b & 0x7f);
+  } while ((b & 0x80) == 0);
+  return x;
+}
+
+
+static size_t loadSize (LoadState *S) {
+  return loadUnsigned(S, MAX_SIZET);
+}
+
+
+static int loadInt (LoadState *S) {
+  return cast_int(loadUnsigned(S, INT_MAX));
+}
+
+
+static lua_Number loadNumber (LoadState *S) {
+  lua_Number x;
+  loadVar(S, x);
+  return x;
+}
+
+
+static lua_Integer loadInteger (LoadState *S) {
+  lua_Integer x;
+  loadVar(S, x);
+  return x;
+}
+
+
+/*
+** Load a nullable string into prototype 'p'.
+*/
+static TString *loadStringN (LoadState *S, Proto *p) {
+  lua_State *L = S->L;
+  TString *ts;
+  size_t size = loadSize(S);
+  if (size == 0)  /* no string? */
+    return NULL;
+  else if (--size <= LUAI_MAXSHORTLEN) {  /* short string? */
+    char buff[LUAI_MAXSHORTLEN];
+    loadVector(S, buff, size);  /* load string into buffer */
+    ts = luaS_newlstr(L, buff, size);  /* create string */
+  }
+  else {  /* long string */
+    ts = luaS_createlngstrobj(L, size);  /* create string */
+    setsvalue2s(L, L->top.p, ts);  /* anchor it ('loadVector' can GC) */
+    luaD_inctop(L);
+    loadVector(S, getlngstr(ts), size);  /* load directly in final place */
+    L->top.p--;  /* pop string */
+  }
+  luaC_objbarrier(L, p, ts);
+  return ts;
+}
+
+
+/*
+** Load a non-nullable string into prototype 'p'.
+*/
+static TString *loadString (LoadState *S, Proto *p) {
+  TString *st = loadStringN(S, p);
+  if (st == NULL)
+    error(S, "bad format for constant string");
+  return st;
+}
+
+
+static void loadCode (LoadState *S, Proto *f) {
+  int n = loadInt(S);
+  f->code = luaM_newvectorchecked(S->L, n, Instruction);
+  f->sizecode = n;
+  loadVector(S, f->code, n);
+}
+
+
+static void loadFunction(LoadState *S, Proto *f, TString *psource);
+
+
+static void loadConstants (LoadState *S, Proto *f) {
+  int i;
+  int n = loadInt(S);
+  f->k = luaM_newvectorchecked(S->L, n, TValue);
+  f->sizek = n;
+  for (i = 0; i < n; i++)
+    setnilvalue(&f->k[i]);
+  for (i = 0; i < n; i++) {
+    TValue *o = &f->k[i];
+    int t = loadByte(S);
+    switch (t) {
+      case LUA_VNIL:
+        setnilvalue(o);
+        break;
+      case LUA_VFALSE:
+        setbfvalue(o);
+        break;
+      case LUA_VTRUE:
+        setbtvalue(o);
+        break;
+      case LUA_VNUMFLT:
+        setfltvalue(o, loadNumber(S));
+        break;
+      case LUA_VNUMINT:
+        setivalue(o, loadInteger(S));
+        break;
+      case LUA_VSHRSTR:
+      case LUA_VLNGSTR:
+        setsvalue2n(S->L, o, loadString(S, f));
+        break;
+      default: lua_assert(0);
+    }
+  }
+}
+
+
+static void loadProtos (LoadState *S, Proto *f) {
+  int i;
+  int n = loadInt(S);
+  f->p = luaM_newvectorchecked(S->L, n, Proto *);
+  f->sizep = n;
+  for (i = 0; i < n; i++)
+    f->p[i] = NULL;
+  for (i = 0; i < n; i++) {
+    f->p[i] = luaF_newproto(S->L);
+    luaC_objbarrier(S->L, f, f->p[i]);
+    loadFunction(S, f->p[i], f->source);
+  }
+}
+
+
+/*
+** Load the upvalues for a function. The names must be filled first,
+** because the filling of the other fields can raise read errors and
+** the creation of the error message can call an emergency collection;
+** in that case all prototypes must be consistent for the GC.
+*/
+static void loadUpvalues (LoadState *S, Proto *f) {
+  int i, n;
+  n = loadInt(S);
+  f->upvalues = luaM_newvectorchecked(S->L, n, Upvaldesc);
+  f->sizeupvalues = n;
+  for (i = 0; i < n; i++)  /* make array valid for GC */
+    f->upvalues[i].name = NULL;
+  for (i = 0; i < n; i++) {  /* following calls can raise errors */
+    f->upvalues[i].instack = loadByte(S);
+    f->upvalues[i].idx = loadByte(S);
+    f->upvalues[i].kind = loadByte(S);
+  }
+}
+
+
+static void loadDebug (LoadState *S, Proto *f) {
+  int i, n;
+  n = loadInt(S);
+  f->lineinfo = luaM_newvectorchecked(S->L, n, ls_byte);
+  f->sizelineinfo = n;
+  loadVector(S, f->lineinfo, n);
+  n = loadInt(S);
+  f->abslineinfo = luaM_newvectorchecked(S->L, n, AbsLineInfo);
+  f->sizeabslineinfo = n;
+  for (i = 0; i < n; i++) {
+    f->abslineinfo[i].pc = loadInt(S);
+    f->abslineinfo[i].line = loadInt(S);
+  }
+  n = loadInt(S);
+  f->locvars = luaM_newvectorchecked(S->L, n, LocVar);
+  f->sizelocvars = n;
+  for (i = 0; i < n; i++)
+    f->locvars[i].varname = NULL;
+  for (i = 0; i < n; i++) {
+    f->locvars[i].varname = loadStringN(S, f);
+    f->locvars[i].startpc = loadInt(S);
+    f->locvars[i].endpc = loadInt(S);
+  }
+  n = loadInt(S);
+  if (n != 0)  /* does it have debug information? */
+    n = f->sizeupvalues;  /* must be this many */
+  for (i = 0; i < n; i++)
+    f->upvalues[i].name = loadStringN(S, f);
+}
+
+
+static void loadFunction (LoadState *S, Proto *f, TString *psource) {
+  f->source = loadStringN(S, f);
+  if (f->source == NULL)  /* no source in dump? */
+    f->source = psource;  /* reuse parent's source */
+  f->linedefined = loadInt(S);
+  f->lastlinedefined = loadInt(S);
+  f->numparams = loadByte(S);
+  f->is_vararg = loadByte(S);
+  f->maxstacksize = loadByte(S);
+  loadCode(S, f);
+  loadConstants(S, f);
+  loadUpvalues(S, f);
+  loadProtos(S, f);
+  loadDebug(S, f);
+}
+
+
+static void checkliteral (LoadState *S, const char *s, const char *msg) {
+  char buff[sizeof(LUA_SIGNATURE) + sizeof(LUAC_DATA)]; /* larger than both */
+  size_t len = strlen(s);
+  loadVector(S, buff, len);
+  if (memcmp(s, buff, len) != 0)
+    error(S, msg);
+}
+
+
+static void fchecksize (LoadState *S, size_t size, const char *tname) {
+  if (loadByte(S) != size)
+    error(S, luaO_pushfstring(S->L, "%s size mismatch", tname));
+}
+
+
+#define checksize(S,t)	fchecksize(S,sizeof(t),#t)
+
+static void checkHeader (LoadState *S) {
+  /* skip 1st char (already read and checked) */
+  checkliteral(S, &LUA_SIGNATURE[1], "not a binary chunk");
+  if (loadByte(S) != LUAC_VERSION)
+    error(S, "version mismatch");
+  if (loadByte(S) != LUAC_FORMAT)
+    error(S, "format mismatch");
+  checkliteral(S, LUAC_DATA, "corrupted chunk");
+  checksize(S, Instruction);
+  checksize(S, lua_Integer);
+  checksize(S, lua_Number);
+  if (loadInteger(S) != LUAC_INT)
+    error(S, "integer format mismatch");
+  if (loadNumber(S) != LUAC_NUM)
+    error(S, "float format mismatch");
+}
+
+
+/*
+** Load precompiled chunk.
+*/
+LClosure *luaU_undump(lua_State *L, ZIO *Z, const char *name) {
+  LoadState S;
+  LClosure *cl;
+  if (*name == '@' || *name == '=')
+    S.name = name + 1;
+  else if (*name == LUA_SIGNATURE[0])
+    S.name = "binary string";
+  else
+    S.name = name;
+  S.L = L;
+  S.Z = Z;
+  checkHeader(&S);
+  cl = luaF_newLclosure(L, loadByte(&S));
+  setclLvalue2s(L, L->top.p, cl);
+  luaD_inctop(L);
+  cl->p = luaF_newproto(L);
+  luaC_objbarrier(L, cl, cl->p);
+  loadFunction(&S, cl->p, NULL);
+  lua_assert(cl->nupvalues == cl->p->sizeupvalues);
+  luai_verifycode(L, cl->p);
+  return cl;
+}
+
@@ -0,0 +1,35 @@
+/*
+** $Id: lundump.h $
+** load precompiled Lua chunks
+** See Copyright Notice in lua.h
+*/
+
+#ifndef lundump_h
+#define lundump_h
+
+#include "llimits.h"
+#include "lobject.h"
+#include "lzio.h"
+
+
+/* data to catch conversion errors */
+#define LUAC_DATA	"\x19\x93\r\n\x1a\n"
+
+#define LUAC_INT	0x5678
+#define LUAC_NUM	cast_num(370.5)
+
+/*
+** Encode major-minor version in one byte, one nibble for each
+*/
+#define LUAC_VERSION  (((LUA_VERSION_NUM / 100) * 16) + LUA_VERSION_NUM % 100)
+
+#define LUAC_FORMAT	0	/* this is the official format */
+
+/* load one chunk; from lundump.c */
+LUAI_FUNC LClosure* luaU_undump (lua_State* L, ZIO* Z, const char* name);
+
+/* dump one chunk; from ldump.c */
+LUAI_FUNC int luaU_dump (lua_State* L, const Proto* f, lua_Writer w,
+                         void* data, int strip);
+
+#endif
@@ -0,0 +1,291 @@
+/*
+** $Id: lutf8lib.c $
+** Standard library for UTF-8 manipulation
+** See Copyright Notice in lua.h
+*/
+
+#define lutf8lib_c
+#define LUA_LIB
+
+#include "lprefix.h"
+
+
+#include <assert.h>
+#include <limits.h>
+#include <stdlib.h>
+#include <string.h>
+
+#include "lua.h"
+
+#include "lauxlib.h"
+#include "lualib.h"
+
+
+#define MAXUNICODE	0x10FFFFu
+
+#define MAXUTF		0x7FFFFFFFu
+
+
+#define MSGInvalid	"invalid UTF-8 code"
+
+/*
+** Integer type for decoded UTF-8 values; MAXUTF needs 31 bits.
+*/
+#if (UINT_MAX >> 30) >= 1
+typedef unsigned int utfint;
+#else
+typedef unsigned long utfint;
+#endif
+
+
+#define iscont(c)	(((c) & 0xC0) == 0x80)
+#define iscontp(p)	iscont(*(p))
+
+
+/* from strlib */
+/* translate a relative string position: negative means back from end */
+static lua_Integer u_posrelat (lua_Integer pos, size_t len) {
+  if (pos >= 0) return pos;
+  else if (0u - (size_t)pos > len) return 0;
+  else return (lua_Integer)len + pos + 1;
+}
+
+
+/*
+** Decode one UTF-8 sequence, returning NULL if byte sequence is
+** invalid.  The array 'limits' stores the minimum value for each
+** sequence length, to check for overlong representations. Its first
+** entry forces an error for non-ascii bytes with no continuation
+** bytes (count == 0).
+*/
+static const char *utf8_decode (const char *s, utfint *val, int strict) {
+  static const utfint limits[] =
+        {~(utfint)0, 0x80, 0x800, 0x10000u, 0x200000u, 0x4000000u};
+  unsigned int c = (unsigned char)s[0];
+  utfint res = 0;  /* final result */
+  if (c < 0x80)  /* ascii? */
+    res = c;
+  else {
+    int count = 0;  /* to count number of continuation bytes */
+    for (; c & 0x40; c <<= 1) {  /* while it needs continuation bytes... */
+      unsigned int cc = (unsigned char)s[++count];  /* read next byte */
+      if (!iscont(cc))  /* not a continuation byte? */
+        return NULL;  /* invalid byte sequence */
+      res = (res << 6) | (cc & 0x3F);  /* add lower 6 bits from cont. byte */
+    }
+    res |= ((utfint)(c & 0x7F) << (count * 5));  /* add first byte */
+    if (count > 5 || res > MAXUTF || res < limits[count])
+      return NULL;  /* invalid byte sequence */
+    s += count;  /* skip continuation bytes read */
+  }
+  if (strict) {
+    /* check for invalid code points; too large or surrogates */
+    if (res > MAXUNICODE || (0xD800u <= res && res <= 0xDFFFu))
+      return NULL;
+  }
+  if (val) *val = res;
+  return s + 1;  /* +1 to include first byte */
+}
+
+
+/*
+** utf8len(s [, i [, j [, lax]]]) --> number of characters that
+** start in the range [i,j], or nil + current position if 's' is not
+** well formed in that interval
+*/
+static int utflen (lua_State *L) {
+  lua_Integer n = 0;  /* counter for the number of characters */
+  size_t len;  /* string length in bytes */
+  const char *s = luaL_checklstring(L, 1, &len);
+  lua_Integer posi = u_posrelat(luaL_optinteger(L, 2, 1), len);
+  lua_Integer posj = u_posrelat(luaL_optinteger(L, 3, -1), len);
+  int lax = lua_toboolean(L, 4);
+  luaL_argcheck(L, 1 <= posi && --posi <= (lua_Integer)len, 2,
+                   "initial position out of bounds");
+  luaL_argcheck(L, --posj < (lua_Integer)len, 3,
+                   "final position out of bounds");
+  while (posi <= posj) {
+    const char *s1 = utf8_decode(s + posi, NULL, !lax);
+    if (s1 == NULL) {  /* conversion error? */
+      luaL_pushfail(L);  /* return fail ... */
+      lua_pushinteger(L, posi + 1);  /* ... and current position */
+      return 2;
+    }
+    posi = s1 - s;
+    n++;
+  }
+  lua_pushinteger(L, n);
+  return 1;
+}
+
+
+/*
+** codepoint(s, [i, [j [, lax]]]) -> returns codepoints for all
+** characters that start in the range [i,j]
+*/
+static int codepoint (lua_State *L) {
+  size_t len;
+  const char *s = luaL_checklstring(L, 1, &len);
+  lua_Integer posi = u_posrelat(luaL_optinteger(L, 2, 1), len);
+  lua_Integer pose = u_posrelat(luaL_optinteger(L, 3, posi), len);
+  int lax = lua_toboolean(L, 4);
+  int n;
+  const char *se;
+  luaL_argcheck(L, posi >= 1, 2, "out of bounds");
+  luaL_argcheck(L, pose <= (lua_Integer)len, 3, "out of bounds");
+  if (posi > pose) return 0;  /* empty interval; return no values */
+  if (pose - posi >= INT_MAX)  /* (lua_Integer -> int) overflow? */
+    return luaL_error(L, "string slice too long");
+  n = (int)(pose -  posi) + 1;  /* upper bound for number of returns */
+  luaL_checkstack(L, n, "string slice too long");
+  n = 0;  /* count the number of returns */
+  se = s + pose;  /* string end */
+  for (s += posi - 1; s < se;) {
+    utfint code;
+    s = utf8_decode(s, &code, !lax);
+    if (s == NULL)
+      return luaL_error(L, MSGInvalid);
+    lua_pushinteger(L, code);
+    n++;
+  }
+  return n;
+}
+
+
+static void pushutfchar (lua_State *L, int arg) {
+  lua_Unsigned code = (lua_Unsigned)luaL_checkinteger(L, arg);
+  luaL_argcheck(L, code <= MAXUTF, arg, "value out of range");
+  lua_pushfstring(L, "%U", (long)code);
+}
+
+
+/*
+** utfchar(n1, n2, ...)  -> char(n1)..char(n2)...
+*/
+static int utfchar (lua_State *L) {
+  int n = lua_gettop(L);  /* number of arguments */
+  if (n == 1)  /* optimize common case of single char */
+    pushutfchar(L, 1);
+  else {
+    int i;
+    luaL_Buffer b;
+    luaL_buffinit(L, &b);
+    for (i = 1; i <= n; i++) {
+      pushutfchar(L, i);
+      luaL_addvalue(&b);
+    }
+    luaL_pushresult(&b);
+  }
+  return 1;
+}
+
+
+/*
+** offset(s, n, [i])  -> index where n-th character counting from
+**   position 'i' starts; 0 means character at 'i'.
+*/
+static int byteoffset (lua_State *L) {
+  size_t len;
+  const char *s = luaL_checklstring(L, 1, &len);
+  lua_Integer n  = luaL_checkinteger(L, 2);
+  lua_Integer posi = (n >= 0) ? 1 : len + 1;
+  posi = u_posrelat(luaL_optinteger(L, 3, posi), len);
+  luaL_argcheck(L, 1 <= posi && --posi <= (lua_Integer)len, 3,
+                   "position out of bounds");
+  if (n == 0) {
+    /* find beginning of current byte sequence */
+    while (posi > 0 && iscontp(s + posi)) posi--;
+  }
+  else {
+    if (iscontp(s + posi))
+      return luaL_error(L, "initial position is a continuation byte");
+    if (n < 0) {
+       while (n < 0 && posi > 0) {  /* move back */
+         do {  /* find beginning of previous character */
+           posi--;
+         } while (posi > 0 && iscontp(s + posi));
+         n++;
+       }
+     }
+     else {
+       n--;  /* do not move for 1st character */
+       while (n > 0 && posi < (lua_Integer)len) {
+         do {  /* find beginning of next character */
+           posi++;
+         } while (iscontp(s + posi));  /* (cannot pass final '\0') */
+         n--;
+       }
+     }
+  }
+  if (n == 0)  /* did it find given character? */
+    lua_pushinteger(L, posi + 1);
+  else  /* no such character */
+    luaL_pushfail(L);
+  return 1;
+}
+
+
+static int iter_aux (lua_State *L, int strict) {
+  size_t len;
+  const char *s = luaL_checklstring(L, 1, &len);
+  lua_Unsigned n = (lua_Unsigned)lua_tointeger(L, 2);
+  if (n < len) {
+    while (iscontp(s + n)) n++;  /* go to next character */
+  }
+  if (n >= len)  /* (also handles original 'n' being negative) */
+    return 0;  /* no more codepoints */
+  else {
+    utfint code;
+    const char *next = utf8_decode(s + n, &code, strict);
+    if (next == NULL || iscontp(next))
+      return luaL_error(L, MSGInvalid);
+    lua_pushinteger(L, n + 1);
+    lua_pushinteger(L, code);
+    return 2;
+  }
+}
+
+
+static int iter_auxstrict (lua_State *L) {
+  return iter_aux(L, 1);
+}
+
+static int iter_auxlax (lua_State *L) {
+  return iter_aux(L, 0);
+}
+
+
+static int iter_codes (lua_State *L) {
+  int lax = lua_toboolean(L, 2);
+  const char *s = luaL_checkstring(L, 1);
+  luaL_argcheck(L, !iscontp(s), 1, MSGInvalid);
+  lua_pushcfunction(L, lax ? iter_auxlax : iter_auxstrict);
+  lua_pushvalue(L, 1);
+  lua_pushinteger(L, 0);
+  return 3;
+}
+
+
+/* pattern to match a single UTF-8 character */
+#define UTF8PATT	"[\0-\x7F\xC2-\xFD][\x80-\xBF]*"
+
+
+static const luaL_Reg funcs[] = {
+  {"offset", byteoffset},
+  {"codepoint", codepoint},
+  {"char", utfchar},
+  {"len", utflen},
+  {"codes", iter_codes},
+  /* placeholders */
+  {"charpattern", NULL},
+  {NULL, NULL}
+};
+
+
+LUAMOD_API int luaopen_utf8 (lua_State *L) {
+  luaL_newlib(L, funcs);
+  lua_pushlstring(L, UTF8PATT, sizeof(UTF8PATT)/sizeof(char) - 1);
+  lua_setfield(L, -2, "charpattern");
+  return 1;
+}
+
@@ -0,0 +1,141 @@
+/*
+** $Id: lvm.h $
+** Lua virtual machine
+** See Copyright Notice in lua.h
+*/
+
+#ifndef lvm_h
+#define lvm_h
+
+
+#include "ldo.h"
+#include "lobject.h"
+#include "ltm.h"
+
+
+#if !defined(LUA_NOCVTN2S)
+#define cvt2str(o)	ttisnumber(o)
+#else
+#define cvt2str(o)	0	/* no conversion from numbers to strings */
+#endif
+
+
+#if !defined(LUA_NOCVTS2N)
+#define cvt2num(o)	ttisstring(o)
+#else
+#define cvt2num(o)	0	/* no conversion from strings to numbers */
+#endif
+
+
+/*
+** You can define LUA_FLOORN2I if you want to convert floats to integers
+** by flooring them (instead of raising an error if they are not
+** integral values)
+*/
+#if !defined(LUA_FLOORN2I)
+#define LUA_FLOORN2I		F2Ieq
+#endif
+
+
+/*
+** Rounding modes for float->integer coercion
+ */
+typedef enum {
+  F2Ieq,     /* no rounding; accepts only integral values */
+  F2Ifloor,  /* takes the floor of the number */
+  F2Iceil    /* takes the ceil of the number */
+} F2Imod;
+
+
+/* convert an object to a float (including string coercion) */
+#define tonumber(o,n) \
+	(ttisfloat(o) ? (*(n) = fltvalue(o), 1) : luaV_tonumber_(o,n))
+
+
+/* convert an object to a float (without string coercion) */
+#define tonumberns(o,n) \
+	(ttisfloat(o) ? ((n) = fltvalue(o), 1) : \
+	(ttisinteger(o) ? ((n) = cast_num(ivalue(o)), 1) : 0))
+
+
+/* convert an object to an integer (including string coercion) */
+#define tointeger(o,i) \
+  (l_likely(ttisinteger(o)) ? (*(i) = ivalue(o), 1) \
+                          : luaV_tointeger(o,i,LUA_FLOORN2I))
+
+
+/* convert an object to an integer (without string coercion) */
+#define tointegerns(o,i) \
+  (l_likely(ttisinteger(o)) ? (*(i) = ivalue(o), 1) \
+                          : luaV_tointegerns(o,i,LUA_FLOORN2I))
+
+
+#define intop(op,v1,v2) l_castU2S(l_castS2U(v1) op l_castS2U(v2))
+
+#define luaV_rawequalobj(t1,t2)		luaV_equalobj(NULL,t1,t2)
+
+
+/*
+** fast track for 'gettable': if 't' is a table and 't[k]' is present,
+** return 1 with 'slot' pointing to 't[k]' (position of final result).
+** Otherwise, return 0 (meaning it will have to check metamethod)
+** with 'slot' pointing to an empty 't[k]' (if 't' is a table) or NULL
+** (otherwise). 'f' is the raw get function to use.
+*/
+#define luaV_fastget(L,t,k,slot,f) \
+  (!ttistable(t)  \
+   ? (slot = NULL, 0)  /* not a table; 'slot' is NULL and result is 0 */  \
+   : (slot = f(hvalue(t), k),  /* else, do raw access */  \
+      !isempty(slot)))  /* result not empty? */
+
+
+/*
+** Special case of 'luaV_fastget' for integers, inlining the fast case
+** of 'luaH_getint'.
+*/
+#define luaV_fastgeti(L,t,k,slot) \
+  (!ttistable(t)  \
+   ? (slot = NULL, 0)  /* not a table; 'slot' is NULL and result is 0 */  \
+   : (slot = (l_castS2U(k) - 1u < hvalue(t)->alimit) \
+              ? &hvalue(t)->array[k - 1] : luaH_getint(hvalue(t), k), \
+      !isempty(slot)))  /* result not empty? */
+
+
+/*
+** Finish a fast set operation (when fast get succeeds). In that case,
+** 'slot' points to the place to put the value.
+*/
+#define luaV_finishfastset(L,t,slot,v) \
+    { setobj2t(L, cast(TValue *,slot), v); \
+      luaC_barrierback(L, gcvalue(t), v); }
+
+
+/*
+** Shift right is the same as shift left with a negative 'y'
+*/
+#define luaV_shiftr(x,y)	luaV_shiftl(x,intop(-, 0, y))
+
+
+
+LUAI_FUNC int luaV_equalobj (lua_State *L, const TValue *t1, const TValue *t2);
+LUAI_FUNC int luaV_lessthan (lua_State *L, const TValue *l, const TValue *r);
+LUAI_FUNC int luaV_lessequal (lua_State *L, const TValue *l, const TValue *r);
+LUAI_FUNC int luaV_tonumber_ (const TValue *obj, lua_Number *n);
+LUAI_FUNC int luaV_tointeger (const TValue *obj, lua_Integer *p, F2Imod mode);
+LUAI_FUNC int luaV_tointegerns (const TValue *obj, lua_Integer *p,
+                                F2Imod mode);
+LUAI_FUNC int luaV_flttointeger (lua_Number n, lua_Integer *p, F2Imod mode);
+LUAI_FUNC void luaV_finishget (lua_State *L, const TValue *t, TValue *key,
+                               StkId val, const TValue *slot);
+LUAI_FUNC void luaV_finishset (lua_State *L, const TValue *t, TValue *key,
+                               TValue *val, const TValue *slot);
+LUAI_FUNC void luaV_finishOp (lua_State *L);
+LUAI_FUNC void luaV_execute (lua_State *L, CallInfo *ci);
+LUAI_FUNC void luaV_concat (lua_State *L, int total);
+LUAI_FUNC lua_Integer luaV_idiv (lua_State *L, lua_Integer x, lua_Integer y);
+LUAI_FUNC lua_Integer luaV_mod (lua_State *L, lua_Integer x, lua_Integer y);
+LUAI_FUNC lua_Number luaV_modf (lua_State *L, lua_Number x, lua_Number y);
+LUAI_FUNC lua_Integer luaV_shiftl (lua_Integer x, lua_Integer y);
+LUAI_FUNC void luaV_objlen (lua_State *L, StkId ra, const TValue *rb);
+
+#endif
@@ -0,0 +1,68 @@
+/*
+** $Id: lzio.c $
+** Buffered streams
+** See Copyright Notice in lua.h
+*/
+
+#define lzio_c
+#define LUA_CORE
+
+#include "lprefix.h"
+
+
+#include <string.h>
+
+#include "lua.h"
+
+#include "llimits.h"
+#include "lmem.h"
+#include "lstate.h"
+#include "lzio.h"
+
+
+int luaZ_fill (ZIO *z) {
+  size_t size;
+  lua_State *L = z->L;
+  const char *buff;
+  lua_unlock(L);
+  buff = z->reader(L, z->data, &size);
+  lua_lock(L);
+  if (buff == NULL || size == 0)
+    return EOZ;
+  z->n = size - 1;  /* discount char being returned */
+  z->p = buff;
+  return cast_uchar(*(z->p++));
+}
+
+
+void luaZ_init (lua_State *L, ZIO *z, lua_Reader reader, void *data) {
+  z->L = L;
+  z->reader = reader;
+  z->data = data;
+  z->n = 0;
+  z->p = NULL;
+}
+
+
+/* --------------------------------------------------------------- read --- */
+size_t luaZ_read (ZIO *z, void *b, size_t n) {
+  while (n) {
+    size_t m;
+    if (z->n == 0) {  /* no bytes in buffer? */
+      if (luaZ_fill(z) == EOZ)  /* try to read more */
+        return n;  /* no more input; return number of missing bytes */
+      else {
+        z->n++;  /* luaZ_fill consumed first byte; put it back */
+        z->p--;
+      }
+    }
+    m = (n <= z->n) ? n : z->n;  /* min. between n and z->n */
+    memcpy(b, z->p, m);
+    z->n -= m;
+    z->p += m;
+    b = (char *)b + m;
+    n -= m;
+  }
+  return 0;
+}
+
@@ -0,0 +1,66 @@
+/*
+** $Id: lzio.h $
+** Buffered streams
+** See Copyright Notice in lua.h
+*/
+
+
+#ifndef lzio_h
+#define lzio_h
+
+#include "lua.h"
+
+#include "lmem.h"
+
+
+#define EOZ	(-1)			/* end of stream */
+
+typedef struct Zio ZIO;
+
+#define zgetc(z)  (((z)->n--)>0 ?  cast_uchar(*(z)->p++) : luaZ_fill(z))
+
+
+typedef struct Mbuffer {
+  char *buffer;
+  size_t n;
+  size_t buffsize;
+} Mbuffer;
+
+#define luaZ_initbuffer(L, buff) ((buff)->buffer = NULL, (buff)->buffsize = 0)
+
+#define luaZ_buffer(buff)	((buff)->buffer)
+#define luaZ_sizebuffer(buff)	((buff)->buffsize)
+#define luaZ_bufflen(buff)	((buff)->n)
+
+#define luaZ_buffremove(buff,i)	((buff)->n -= (i))
+#define luaZ_resetbuffer(buff) ((buff)->n = 0)
+
+
+#define luaZ_resizebuffer(L, buff, size) \
+	((buff)->buffer = luaM_reallocvchar(L, (buff)->buffer, \
+				(buff)->buffsize, size), \
+	(buff)->buffsize = size)
+
+#define luaZ_freebuffer(L, buff)	luaZ_resizebuffer(L, buff, 0)
+
+
+LUAI_FUNC void luaZ_init (lua_State *L, ZIO *z, lua_Reader reader,
+                                        void *data);
+LUAI_FUNC size_t luaZ_read (ZIO* z, void *b, size_t n);	/* read next n bytes */
+
+
+
+/* --------- Private Part ------------------ */
+
+struct Zio {
+  size_t n;			/* bytes still unread */
+  const char *p;		/* current position in buffer */
+  lua_Reader reader;		/* reader function */
+  void *data;			/* additional data */
+  lua_State *L;			/* Lua state (for reader) */
+};
+
+
+LUAI_FUNC int luaZ_fill (ZIO *z);
+
+#endif
@@ -0,0 +1,910 @@
+#include <tt_app.h>
+#include <tt_lvgl.h>
+#include <tt_lvgl_toolbar.h>
+#include <lvgl.h>
+#include <esp_heap_caps.h>
+#include <esp_timer.h>
+#include <freertos/FreeRTOS.h>
+#include <freertos/task.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <math.h>
+#include <time.h>
+
+#include "lua.h"
+#include "lauxlib.h"
+#include "lualib.h"
+#include "audio.h"
+#include "font8x8.h"
+#include "pico_games.h"
+
+#undef ESP_LOGI
+#undef ESP_LOGW
+#undef ESP_LOGE
+#define ESP_LOGI(t,f,...) printf("[I] " f "\n",##__VA_ARGS__)
+#define ESP_LOGW(t,f,...) printf("[W] " f "\n",##__VA_ARGS__)
+#define ESP_LOGE(t,f,...) printf("[E] " f "\n",##__VA_ARGS__)
+
+#define TAG "LuaGame"
+#define GAME_W 240
+#define GAME_H 240
+#define GAME_W_DEFAULT 240
+#define GAME_H_DEFAULT 240
+#define TICK_MS 16
+
+/* stubs for missing libc symbols */
+void clearerr(FILE* f){(void)f;}
+clock_t clock(void){return 0;}
+char* getenv(const char* n){(void)n;return NULL;}
+struct tm* gmtime(const time_t* t){(void)t; static struct tm d={0};return &d;}
+char* setlocale(int c,const char* l){(void)c;(void)l;return NULL;}
+int setvbuf(FILE* s,char* b,int m,size_t z){(void)s;(void)b;(void)m;(void)z;return 0;}
+FILE* tmpfile(void){return NULL;}
+char* tmpnam(char* s){if(s)s[0]=0;return s;}
+int ungetc(int c,FILE* st){(void)st;return c;}
+
+/* Custom Lua allocator using PSRAM to reduce internal memory pressure */
+static void* lua_psram_alloc(void *ud, void *ptr, size_t osize, size_t nsize){
+    (void)ud; (void)osize;
+    if(nsize==0){
+        if(ptr) heap_caps_free(ptr);
+        return NULL;
+    }
+    void* newptr = heap_caps_malloc(nsize, MALLOC_CAP_SPIRAM | MALLOC_CAP_8BIT);
+    if(!newptr){
+        newptr = heap_caps_malloc(nsize, MALLOC_CAP_8BIT);
+    }
+    if(!newptr) return NULL;
+    if(ptr){
+        size_t copy = osize < nsize ? osize : nsize;
+        memcpy(newptr, ptr, copy);
+        heap_caps_free(ptr);
+    }
+    return newptr;
+}
+
+typedef struct {
+    AppHandle app;
+    lv_obj_t* root;
+    lv_obj_t* toolbar;
+    lv_obj_t* game_area;
+    lv_obj_t* canvas;
+    lv_obj_t* label_layer;
+    lv_obj_t* fps_label;
+    uint16_t* fb;
+    int fb_w;
+    int fb_h;
+    int game_w;
+    int game_h;
+    lv_timer_t* timer;
+    TaskHandle_t lua_task;
+    bool touch_pressed;
+    bool prev_touch_pressed;
+    int touch_x;
+    int touch_y;
+    lua_State* L;
+    bool lua_ok;
+    bool initialized;
+    bool is_pico;
+    bool wants_frame_updates;
+    uint64_t last_tick_us;
+    bool should_exit;
+    bool needs_redraw;
+    // fps
+    uint32_t fps_frames;
+    uint64_t fps_last_us;
+    float fps;
+} AppCtx;
+
+static AppCtx* g_ctx=NULL;
+
+static uint16_t hex_to_rgb565(uint32_t hex){
+    uint8_t r=(hex>>16)&0xFF,g=(hex>>8)&0xFF,b=hex&0xFF;
+    return ((r>>3)<<11)|((g>>2)<<5)|(b>>3);
+}
+static inline void set_px(AppCtx* c,int x,int y,uint16_t col){
+    if(!c||!c->fb)return;
+    int w = c->fb_w ? c->fb_w : GAME_W_DEFAULT;
+    int h = c->fb_h ? c->fb_h : GAME_H_DEFAULT;
+    if(x<0||y<0||x>=w||y>=h)return;
+    c->fb[y*w+x]=col;
+}
+static void fill_rect(AppCtx* c,int x,int y,int w,int h,uint16_t col,bool filled){
+    if(w<=0||h<=0)return;
+    if(!filled){
+        for(int i=x;i<x+w;i++){set_px(c,i,y,col);set_px(c,i,y+h-1,col);}
+        for(int j=y;j<y+h;j++){set_px(c,x,j,col);set_px(c,x+w-1,j,col);}
+        return;
+    }
+    int fb_w = c->fb_w ? c->fb_w : GAME_W_DEFAULT;
+    int fb_h = c->fb_h ? c->fb_h : GAME_H_DEFAULT;
+    int x0=x<0?0:x,y0=y<0?0:y,x1=x+w> fb_w? fb_w:x+w,y1=y+h>fb_h?fb_h:y+h;
+    for(int yy=y0;yy<y1;yy++){uint16_t* row=c->fb+yy*fb_w; for(int xx=x0;xx<x1;xx++) row[xx]=col;}
+}
+static void draw_circle(AppCtx* c,int cx,int cy,int r,uint16_t col,bool filled){
+    if(r<=0)return;
+    if(filled){
+        for(int dy=-r;dy<=r;dy++){int dxl=(int)sqrtf((float)(r*r-dy*dy)); for(int dx=-dxl;dx<=dxl;dx++) set_px(c,cx+dx,cy+dy,col);}
+    }else{
+        int x=r,y=0,err=0;
+        while(x>=y){set_px(c,cx+x,cy+y,col);set_px(c,cx+y,cy+x,col);set_px(c,cx-y,cy+x,col);set_px(c,cx-x,cy+y,col);set_px(c,cx-x,cy-y,col);set_px(c,cx-y,cy-x,col);set_px(c,cx+y,cy-x,col);set_px(c,cx+x,cy-y,col); y++; if(err<=0) err+=2*y+1; if(err>0){x--; err-=2*x+1;}}
+    }
+}
+static void draw_line(AppCtx* c,int x0,int y0,int x1,int y1,uint16_t col){
+    int dx=abs(x1-x0),dy=-abs(y1-y0),sx=x0<x1?1:-1,sy=y0<y1?1:-1,err=dx+dy;
+    while(1){set_px(c,x0,y0,col); if(x0==x1&&y0==y1)break; int e2=2*err; if(e2>=dy){err+=dy;x0+=sx;} if(e2<=dx){err+=dx;y0+=sy;}}
+}
+static void clear_labels(AppCtx* ctx){
+    // Now text is drawn directly to framebuffer, no LVGL labels to clean
+    (void)ctx;
+}
+static void invalidate_canvas(AppCtx* ctx){if(!ctx||!ctx->canvas)return; lv_obj_invalidate(ctx->canvas);}
+
+static void draw_char8(AppCtx* ctx, int x, int y, char ch, uint16_t col){
+    unsigned char uch = (unsigned char)ch;
+    if(uch>=128) return;
+    // font8x8_basic is 8x8, each byte is row, bit 0 is leftmost? Actually font8x8_basic stores rows as bits
+    for(int row=0; row<8; row++){
+        uint8_t bits = font8x8_basic[(int)ch][row];
+        for(int colb=0; colb<8; colb++){
+            if(bits & (1<<colb)){
+                set_px(ctx, x+colb, y+row, col);
+            }
+        }
+    }
+}
+static void draw_text8(AppCtx* ctx, int x, int y, const char* txt, uint16_t col){
+    if(!txt) return;
+    int cx=x;
+    int cy=y;
+    int max_w = ctx->game_w ? ctx->game_w : GAME_W_DEFAULT;
+    for(int i=0; txt[i]; i++){
+        char ch=txt[i];
+        if(ch=='\n'){ cx=x; cy+=10; continue; }
+        draw_char8(ctx, cx, cy, ch, col);
+        cx+=8;
+        // wrap if exceeds game width
+        if(cx+8>max_w){ cx=x; cy+=10; }
+    }
+}
+
+/* Lua bindings */
+static int l_sys_log(lua_State* L){const char* m=luaL_checkstring(L,1); printf("[LUA] %s\n",m); return 0;}
+static int l_sys_clear(lua_State* L){
+    AppCtx* ctx=g_ctx; if(!ctx)return 0;
+    uint32_t hex=0; if(lua_gettop(L)>=1) hex=(uint32_t)(luaL_checknumber(L,1));
+    int w = ctx->game_w ? ctx->game_w : GAME_W_DEFAULT;
+    int h = ctx->game_h ? ctx->game_h : GAME_H_DEFAULT;
+    fill_rect(ctx,0,0,w,h,hex_to_rgb565(hex),true);
+    clear_labels(ctx);
+    return 0;
+}
+static int l_sys_print(lua_State* L){
+    AppCtx* ctx=g_ctx; if(!ctx)return 0;
+    int x=(int)luaL_checknumber(L,1);
+    int y=(int)luaL_checknumber(L,2);
+    const char* txt=luaL_checkstring(L,3);
+    uint32_t hex=0xFFFFFF; if(lua_gettop(L)>=4) hex=(uint32_t)luaL_checknumber(L,4);
+    uint16_t col = hex_to_rgb565(hex);
+    draw_text8(ctx, x, y, txt, col);
+    return 0;
+}
+static int l_sys_rect(lua_State* L){
+    AppCtx* ctx=g_ctx; if(!ctx)return 0;
+    int x=(int)luaL_checknumber(L,1);
+    int y=(int)luaL_checknumber(L,2);
+    int w=(int)luaL_checknumber(L,3);
+    int h=(int)luaL_checknumber(L,4);
+    uint32_t hex=(uint32_t)luaL_checknumber(L,5);
+    bool f=false; if(lua_gettop(L)>=6) f=lua_toboolean(L,6);
+    fill_rect(ctx,x,y,w,h,hex_to_rgb565(hex),f); return 0;
+}
+static int l_sys_circle(lua_State* L){
+    AppCtx* ctx=g_ctx; if(!ctx)return 0;
+    int x=(int)luaL_checknumber(L,1);
+    int y=(int)luaL_checknumber(L,2);
+    int r=(int)luaL_checknumber(L,3);
+    uint32_t hex=(uint32_t)luaL_checknumber(L,4);
+    bool f=false; if(lua_gettop(L)>=5) f=lua_toboolean(L,5);
+    draw_circle(ctx,x,y,r,hex_to_rgb565(hex),f); return 0;
+}
+static int l_sys_line(lua_State* L){
+    AppCtx* ctx=g_ctx; if(!ctx)return 0;
+    int x0=(int)luaL_checknumber(L,1);
+    int y0=(int)luaL_checknumber(L,2);
+    int x1=(int)luaL_checknumber(L,3);
+    int y1=(int)luaL_checknumber(L,4);
+    uint32_t hex=(uint32_t)luaL_checknumber(L,5);
+    draw_line(ctx,x0,y0,x1,y1,hex_to_rgb565(hex)); return 0;
+}
+static int l_sys_touch(lua_State* L){
+    AppCtx* ctx=g_ctx;
+    if(!ctx){lua_pushboolean(L,0); lua_pushinteger(L,0); lua_pushinteger(L,0); return 3;}
+    lua_pushboolean(L,ctx->touch_pressed?1:0); lua_pushinteger(L,ctx->touch_x); lua_pushinteger(L,ctx->touch_y); return 3;
+}
+static int l_sys_tone(lua_State* L){
+    int note = (int)luaL_checknumber(L,1);
+    int dur = 50;
+    const char* wave = "sine";
+    float vol = 0.5f;
+    if(lua_gettop(L)>=2) dur = (int)luaL_checknumber(L,2);
+    if(lua_gettop(L)>=3) wave = luaL_checkstring(L,3);
+    if(lua_gettop(L)>=4) vol = (float)luaL_checknumber(L,4);
+    audio_play_tone(note, dur, wave, vol);
+    return 0;
+}
+static int l_sys_sfx(lua_State* L){
+    const char* name = luaL_checkstring(L,1);
+    printf("[LUA SFX] %s\n",name);
+    audio_play_sfx(name);
+    return 0;
+}
+
+/* ---------- Pico API compatibility ---------- */
+static int l_renderer_clear(lua_State* L){
+    AppCtx* ctx=g_ctx; if(!ctx) return 0;
+    bool white = false;
+    if(lua_gettop(L)>=1) white = lua_toboolean(L,1);
+    uint16_t col = white ? 0xFFFF : 0x0000;
+    int w = ctx->game_w ? ctx->game_w : GAME_W_DEFAULT;
+    int h = ctx->game_h ? ctx->game_h : GAME_H_DEFAULT;
+    fill_rect(ctx,0,0,w,h,col,true);
+    clear_labels(ctx);
+    return 0;
+}
+static int l_renderer_pixel(lua_State* L){
+    AppCtx* ctx=g_ctx; if(!ctx) return 0;
+    int x=(int)luaL_checknumber(L,1);
+    int y=(int)luaL_checknumber(L,2);
+    bool on = true; if(lua_gettop(L)>=3) on = lua_toboolean(L,3);
+    uint16_t col = on ? 0xFFFF : 0x0000;
+    set_px(ctx,x,y,col);
+    return 0;
+}
+static int l_renderer_line(lua_State* L){
+    AppCtx* ctx=g_ctx; if(!ctx) return 0;
+    int x0=(int)luaL_checknumber(L,1);
+    int y0=(int)luaL_checknumber(L,2);
+    int x1=(int)luaL_checknumber(L,3);
+    int y1=(int)luaL_checknumber(L,4);
+    bool on = true; if(lua_gettop(L)>=5) on = lua_toboolean(L,5);
+    // width ignored
+    uint16_t col = on ? 0xFFFF : 0x0000;
+    draw_line(ctx,x0,y0,x1,y1,col);
+    return 0;
+}
+static int l_renderer_rect(lua_State* L){
+    AppCtx* ctx=g_ctx; if(!ctx) return 0;
+    int x=(int)luaL_checknumber(L,1);
+    int y=(int)luaL_checknumber(L,2);
+    int w=(int)luaL_checknumber(L,3);
+    int h=(int)luaL_checknumber(L,4);
+    bool on = true; if(lua_gettop(L)>=5) on = lua_toboolean(L,5);
+    bool filled = false; if(lua_gettop(L)>=6) filled = lua_toboolean(L,6);
+    uint16_t col = on ? 0xFFFF : 0x0000;
+    fill_rect(ctx,x,y,w,h,col,filled);
+    // if not filled and on=true, we already draw border via fill_rect false, but our fill_rect does border
+    // To match pico: if filled false, draw outline with on color
+    if(!filled){
+        // ensure border drawn (our fill_rect already draws border when filled=false)
+    }
+    return 0;
+}
+static int l_renderer_circle(lua_State* L){
+    AppCtx* ctx=g_ctx; if(!ctx) return 0;
+    int x=(int)luaL_checknumber(L,1);
+    int y=(int)luaL_checknumber(L,2);
+    int r=(int)luaL_checknumber(L,3);
+    bool on = true; if(lua_gettop(L)>=4) on = lua_toboolean(L,4);
+    bool filled = false; if(lua_gettop(L)>=5) filled = lua_toboolean(L,5);
+    uint16_t col = on ? 0xFFFF : 0x0000;
+    draw_circle(ctx,x,y,r,col,filled);
+    return 0;
+}
+// Simple triangle rasterizer: draw outline and optionally filled via scanline
+static void draw_triangle_filled(AppCtx* ctx, int x0,int y0,int x1,int y1,int x2,int y2,uint16_t col){
+    // Sort vertices by y
+    if(y0>y1){ int tx=x0; x0=x1; x1=tx; int ty=y0; y0=y1; y1=ty; }
+    if(y1>y2){ int tx=x1; x1=x2; x2=tx; int ty=y1; y1=y2; y2=ty; }
+    if(y0>y1){ int tx=x0; x0=x1; x1=tx; int ty=y0; y0=y1; y1=ty; }
+    // Now y0 <= y1 <= y2
+    int total_height = y2 - y0;
+    if(total_height==0) return;
+    for(int i=0;i<total_height;i++){
+        bool second_half = i > y1 - y0 || y1==y0;
+        int segment_height = second_half ? y2 - y1 : y1 - y0;
+        if(segment_height==0) continue;
+        float alpha = (float)i / total_height;
+        float beta = (float)(i - (second_half ? y1 - y0 : 0)) / segment_height;
+        int ax = x0 + (int)((x2 - x0) * alpha);
+        int bx;
+        if(second_half) bx = x1 + (int)((x2 - x1) * beta);
+        else bx = x0 + (int)((x1 - x0) * beta);
+        if(ax>bx){ int t=ax; ax=bx; bx=t; }
+        for(int j=ax;j<=bx;j++) set_px(ctx,j,y0+i,col);
+    }
+}
+static int l_renderer_triangle(lua_State* L){
+    AppCtx* ctx=g_ctx; if(!ctx) return 0;
+    int x0=(int)luaL_checknumber(L,1);
+    int y0=(int)luaL_checknumber(L,2);
+    int x1=(int)luaL_checknumber(L,3);
+    int y1=(int)luaL_checknumber(L,4);
+    int x2=(int)luaL_checknumber(L,5);
+    int y2=(int)luaL_checknumber(L,6);
+    bool on = true; if(lua_gettop(L)>=7) on = lua_toboolean(L,7);
+    bool filled = false; if(lua_gettop(L)>=8) filled = lua_toboolean(L,8);
+    uint16_t col = on ? 0xFFFF : 0x0000;
+    if(filled){
+        draw_triangle_filled(ctx,x0,y0,x1,y1,x2,y2,col);
+    }else{
+        draw_line(ctx,x0,y0,x1,y1,col);
+        draw_line(ctx,x1,y1,x2,y2,col);
+        draw_line(ctx,x2,y2,x0,y0,col);
+    }
+    return 0;
+}
+static int l_renderer_text(lua_State* L){
+    AppCtx* ctx=g_ctx; if(!ctx) return 0;
+    int x=(int)luaL_checknumber(L,1);
+    int y=(int)luaL_checknumber(L,2);
+    const char* txt=luaL_checkstring(L,3);
+    bool on = true; if(lua_gettop(L)>=4) on = lua_toboolean(L,4);
+    uint16_t col = on ? 0xFFFF : 0x0000;
+    draw_text8(ctx,x,y,txt,col);
+    return 0;
+}
+static int l_renderer_text_scaled(lua_State* L){
+    AppCtx* ctx=g_ctx; if(!ctx) return 0;
+    int x=(int)luaL_checknumber(L,1);
+    int y=(int)luaL_checknumber(L,2);
+    const char* txt=luaL_checkstring(L,3);
+    bool on = true; if(lua_gettop(L)>=4) on = lua_toboolean(L,4);
+    int scale = 1; if(lua_gettop(L)>=5) scale = (int)luaL_checknumber(L,5);
+    if(scale<1) scale=1;
+    if(scale>4) scale=4;
+    uint16_t col = on ? 0xFFFF : 0x0000;
+    // Simple scaled: draw each char scaled by duplicating pixels
+    int cx=x;
+    int cy=y;
+    for(int i=0; txt[i]; i++){
+        char ch=txt[i];
+        if(ch=='\n'){ cx=x; cy+=8*scale+2; continue; }
+        unsigned char uch=(unsigned char)ch;
+        if(uch>=128) continue;
+        for(int row=0; row<8; row++){
+            uint8_t bits = font8x8_basic[uch][row];
+            for(int colb=0; colb<8; colb++){
+                if(bits & (1<<colb)){
+                    // draw scale x scale block
+                    for(int sy=0; sy<scale; sy++){
+                        for(int sx=0; sx<scale; sx++){
+                            set_px(ctx, cx+colb*scale+sx, cy+row*scale+sy, col);
+                        }
+                    }
+                }
+            }
+        }
+        cx+=8*scale;
+        {
+            int max_w = g_ctx && g_ctx->game_w ? g_ctx->game_w : GAME_W_DEFAULT;
+            if(cx+8*scale>max_w){ cx=x; cy+=8*scale+2; }
+        }
+    }
+    return 0;
+}
+static int l_game_width(lua_State* L){ 
+    AppCtx* ctx=g_ctx;
+    int w = ctx && ctx->game_w ? ctx->game_w : GAME_W_DEFAULT;
+    lua_pushinteger(L, w); return 1; 
+}
+static int l_game_height(lua_State* L){ 
+    AppCtx* ctx=g_ctx;
+    int h = ctx && ctx->game_h ? ctx->game_h : GAME_H_DEFAULT;
+    lua_pushinteger(L, h); return 1; 
+}
+static int l_game_set_frame_updates(lua_State* L){
+    AppCtx* ctx=g_ctx;
+    bool en = false;
+    if(lua_gettop(L)>=1) en = lua_toboolean(L,1);
+    if(ctx) ctx->wants_frame_updates = en;
+    printf("[LuaGame] set_frame_updates %d\n", en?1:0);
+    return 0;
+}
+static int l_game_exit(lua_State* L){
+    (void)L;
+    AppCtx* ctx=g_ctx;
+    printf("[LuaGame] game.exit() called -> stopping app\n");
+    if(ctx) ctx->should_exit = true;
+    tt_app_stop();
+    return 0;
+}
+
+static void register_sys(lua_State* L){
+    // sys table (Tactility original)
+    lua_newtable(L);
+    lua_pushcfunction(L,l_sys_log); lua_setfield(L,-2,"log");
+    lua_pushcfunction(L,l_sys_clear); lua_setfield(L,-2,"clear");
+    lua_pushcfunction(L,l_sys_print); lua_setfield(L,-2,"print");
+    lua_pushcfunction(L,l_sys_rect); lua_setfield(L,-2,"rect");
+    lua_pushcfunction(L,l_sys_circle); lua_setfield(L,-2,"circle");
+    lua_pushcfunction(L,l_sys_line); lua_setfield(L,-2,"line");
+    lua_pushcfunction(L,l_sys_touch); lua_setfield(L,-2,"touch");
+    lua_pushcfunction(L,l_sys_tone); lua_setfield(L,-2,"tone");
+    lua_pushcfunction(L,l_sys_sfx); lua_setfield(L,-2,"sfx");
+    lua_setglobal(L,"sys");
+
+    // renderer table (Pico)
+    lua_newtable(L);
+    lua_pushcfunction(L,l_renderer_clear); lua_setfield(L,-2,"clear");
+    lua_pushcfunction(L,l_renderer_pixel); lua_setfield(L,-2,"pixel");
+    lua_pushcfunction(L,l_renderer_line); lua_setfield(L,-2,"line");
+    lua_pushcfunction(L,l_renderer_rect); lua_setfield(L,-2,"rect");
+    lua_pushcfunction(L,l_renderer_circle); lua_setfield(L,-2,"circle");
+    lua_pushcfunction(L,l_renderer_triangle); lua_setfield(L,-2,"triangle");
+    lua_pushcfunction(L,l_renderer_text); lua_setfield(L,-2,"text");
+    lua_pushcfunction(L,l_renderer_text_scaled); lua_setfield(L,-2,"text_scaled");
+    lua_setglobal(L,"renderer");
+
+    // game table
+    lua_newtable(L);
+    lua_pushcfunction(L,l_game_width); lua_setfield(L,-2,"width");
+    lua_pushcfunction(L,l_game_height); lua_setfield(L,-2,"height");
+    lua_pushcfunction(L,l_game_set_frame_updates); lua_setfield(L,-2,"set_frame_updates");
+    lua_pushcfunction(L,l_game_exit); lua_setfield(L,-2,"exit");
+    // game.vars subtable
+    lua_newtable(L);
+    lua_setfield(L,-2,"vars");
+    lua_setglobal(L,"game");
+
+    // INPUT constants
+    lua_newtable(L);
+    lua_pushinteger(L,0); lua_setfield(L,-2,"NONE");
+    lua_pushinteger(L,1); lua_setfield(L,-2,"TOUCH_DOWN");
+    lua_pushinteger(L,2); lua_setfield(L,-2,"TOUCH_MOVE");
+    lua_pushinteger(L,3); lua_setfield(L,-2,"TOUCH_UP");
+    lua_pushinteger(L,4); lua_setfield(L,-2,"BUTTON_0");
+    lua_pushinteger(L,5); lua_setfield(L,-2,"BUTTON_1");
+    lua_pushinteger(L,6); lua_setfield(L,-2,"FRAME_TICK");
+    lua_pushinteger(L,7); lua_setfield(L,-2,"GESTURE");
+    lua_setglobal(L,"INPUT");
+}
+
+/* Embedded breakout - faster ball: 3.5 instead of 2 */
+static const char* embedded_breakout_lua_src =
+"local PADDLE_W=40 local PADDLE_H=8 local BALL_SIZE=6 local BRICK_ROWS=4 local BRICK_COLS=6 local BRICK_W=34 local BRICK_H=8 local BRICK_GAP=4\n"
+"local score=0 local lives=3 local game_state='serve' local px,py=100,210 local bx,by=120,150 local bdx,bdy=4.5,-4.5 local bricks={}\n"
+"function init() sys.log('Init Breakout fast v2!') reset_bricks() reset_ball() end\n"
+"function reset_bricks() bricks={} for r=1,BRICK_ROWS do bricks[r]={} for c=1,BRICK_COLS do bricks[r][c]=true end end end\n"
+"function reset_ball() bx=120 by=150 bdx=4.5 bdy=-4.5 game_state='serve' end\n"
+"function update(dt) local pressed,tx,ty=sys.touch() if pressed then px=tx-PADDLE_W/2 if px<0 then px=0 end if px>240-PADDLE_W then px=240-PADDLE_W end if game_state=='serve' then game_state='play' sys.sfx('confirm') elseif game_state=='gameover' or game_state=='win' then score=0 lives=3 reset_bricks() reset_ball() end end if game_state=='play' then bx=bx+bdx by=by+bdy if bx<=0 or bx>=240-BALL_SIZE then bdx=-bdx sys.tone(60,80,'sine',0.4) end if by<=0 then bdy=-bdy sys.tone(64,80,'sine',0.4) end if by>=240 then lives=lives-1 sys.sfx('hurt') if lives<=0 then game_state='gameover' sys.sfx('gameover') else reset_ball() end end if by+BALL_SIZE>=py and by<=py+PADDLE_H then if bx+BALL_SIZE>=px and bx<=px+PADDLE_W then bdy=-math.abs(bdy) local hp=(bx+BALL_SIZE/2)-(px+PADDLE_W/2) bdx=hp*0.25 sys.tone(72,100,'triangle',0.5) end end local hit=false for r=1,BRICK_ROWS do for c=1,BRICK_COLS do if bricks[r][c] then local bmin=(c-1)*(BRICK_W+BRICK_GAP)+BRICK_GAP local bymin=r*(BRICK_H+BRICK_GAP)+20 if bx+BALL_SIZE>=bmin and bx<=bmin+BRICK_W and by+BALL_SIZE>=bymin and by<=bymin+BRICK_H then bricks[r][c]=false bdy=-bdy score=score+10 sys.sfx('coin') hit=true break end end end if hit then break end end local has=false for r=1,BRICK_ROWS do for c=1,BRICK_COLS do if bricks[r][c] then has=true end end end if not has then game_state='win' sys.sfx('levelup') end end end\n"
+"function draw() sys.clear(0x1e1e2e) sys.print(4,4,'SCORE: '..score,0xf5e0dc) sys.print(160,4,'LIVES: '..lives,0xf5e0dc) sys.line(0,16,240,16,0x585b70) sys.rect(px,py,PADDLE_W,PADDLE_H,0x89b4fa,true) sys.circle(bx+BALL_SIZE/2,by+BALL_SIZE/2,BALL_SIZE/2,0xf9e2af,true) for r=1,BRICK_ROWS do for c=1,BRICK_COLS do if bricks[r][c] then local bmin=(c-1)*(BRICK_W+BRICK_GAP)+BRICK_GAP local bymin=r*(BRICK_H+BRICK_GAP)+20 local col=0xf38ba8 if r==2 then col=0xf9e2af elseif r==3 then col=0xa6e3a1 elseif r==4 then col=0x89b4fa end sys.rect(bmin,bymin,BRICK_W,BRICK_H,col,true) end end end if game_state=='serve' then sys.print(40,120,'TAP TO SERVE',0xa6e3a1) elseif game_state=='gameover' then sys.print(80,110,'GAME OVER',0xf38ba8) sys.print(45,130,'TAP AGAIN',0xa6e3a1) elseif game_state=='win' then sys.print(90,110,'YOU WIN!',0xa6e3a1) sys.print(45,130,'TAP AGAIN',0x89b4fa) end end\n"
+;
+
+static void* alloc_psram(size_t sz){
+    void* p=heap_caps_malloc(sz,MALLOC_CAP_SPIRAM|MALLOC_CAP_8BIT);
+    if(!p) p=heap_caps_malloc(sz,MALLOC_CAP_8BIT);
+    if(!p) p=malloc(sz);
+    return p;
+}
+static void game_loop_task(void* arg);
+static char* load_file_to_mem(const char* path, size_t* out_len){
+    FILE* f=fopen(path,"rb");
+    if(!f) return NULL;
+    fseek(f,0,SEEK_END);
+    long sz=ftell(f);
+    fseek(f,0,SEEK_SET);
+    if(sz<=0 || sz>200*1024){ fclose(f); return NULL; }
+    char* buf=(char*)alloc_psram(sz+1);
+    if(!buf){ fclose(f); return NULL; }
+    size_t r=fread(buf,1,sz,f);
+    fclose(f);
+    if(r!=(size_t)sz){ heap_caps_free(buf); return NULL; }
+    buf[sz]=0;
+    if(out_len) *out_len=sz;
+    return buf;
+}
+static void lua_init_task(void* arg){
+    AppCtx* ctx=(AppCtx*)arg;
+    printf("[LuaGame] init task start (PSRAM alloc)\n");
+    // Use PSRAM allocator for Lua to reduce internal memory pressure
+    ctx->L=lua_newstate(lua_psram_alloc, NULL);
+    if(!ctx->L){ printf("[LuaGame] lua newstate fail\n"); vTaskDelete(NULL); return;}
+    luaL_openlibs(ctx->L);
+    register_sys(ctx->L);
+    const char* external_paths[]={
+        "/sdcard/lua/solitaire.lua",
+        "/sdcard/lua/breakout.lua",
+        "/sdcard/lua/game.lua",
+        "/sdcard/lua/pong.lua",
+        "/sdcard/lua/snake.lua",
+        "/sdcard/lua/tetris.lua",
+        NULL
+    };
+    char* src_buf=NULL;
+    size_t src_len=0;
+    const char* loaded_from="embedded";
+    bool use_external = true; // enable SD loading for solitaire migration
+    bool use_pico_test = false;
+    const char* pico_test_src = NULL;
+    if(use_pico_test){
+        pico_test_src = pong_lua_src;
+        printf("[LuaGame] using Pico test game: Pong (%d bytes)\n", (int)strlen(pico_test_src));
+        src_len = strlen(pico_test_src);
+        src_buf = (char*)alloc_psram(src_len+1);
+        if(src_buf){
+            memcpy(src_buf, pico_test_src, src_len+1);
+            loaded_from = "pico_pong";
+        }
+    }
+    if(!src_buf && use_external){
+        for(int i=0; external_paths[i]; i++){
+            src_buf=load_file_to_mem(external_paths[i], &src_len);
+            if(src_buf){
+                loaded_from=external_paths[i];
+                printf("[LuaGame] loaded external %s %d bytes\n",loaded_from,(int)src_len);
+                break;
+            }
+        }
+    }
+    // Detect Pico API by content before loading
+    bool detected_pico = false;
+    bool needs_audio = false;
+    if(src_buf){
+        if(strstr(src_buf,"renderer.")!=NULL || strstr(src_buf,"INPUT.")!=NULL){
+            detected_pico = true;
+        }
+        if(strstr(src_buf,"sfx")!=NULL || strstr(src_buf,"tone")!=NULL){
+            needs_audio = true;
+        }
+    } else {
+        if(strstr(embedded_breakout_lua_src,"renderer.")!=NULL){
+            detected_pico = true;
+        }
+        if(strstr(embedded_breakout_lua_src,"sfx")!=NULL || strstr(embedded_breakout_lua_src,"tone")!=NULL){
+            needs_audio = true;
+        }
+    }
+    if(needs_audio){
+        printf("[LuaGame] audio needed, init SfxEngine\n");
+        audio_init();
+    } else {
+        printf("[LuaGame] audio not needed, skipping SfxEngine to save RAM\n");
+    }
+
+    int st;
+    if(src_buf){
+        st=luaL_loadbuffer(ctx->L,src_buf,src_len,loaded_from);
+        heap_caps_free(src_buf);
+        src_buf=NULL;
+    }else{
+        printf("[LuaGame] loading embedded lua %d bytes\n",(int)strlen(embedded_breakout_lua_src));
+        st=luaL_loadstring(ctx->L,embedded_breakout_lua_src);
+        loaded_from="embedded";
+    }
+    if(st!=LUA_OK){const char* e=lua_tostring(ctx->L,-1); printf("[LuaGame] load err (%s) %s\n",loaded_from,e); lua_pop(ctx->L,1); vTaskDelete(NULL); return;}
+    if(lua_pcall(ctx->L,0,0,0)!=LUA_OK){const char* e=lua_tostring(ctx->L,-1); printf("[LuaGame] pcall err %s\n",e); lua_pop(ctx->L,1); vTaskDelete(NULL); return;}
+    lua_getglobal(ctx->L,"init");
+    if(lua_isfunction(ctx->L,-1)){
+        if(lua_pcall(ctx->L,0,0,0)!=LUA_OK){const char* e=lua_tostring(ctx->L,-1); printf("[LuaGame] init err %s\n",e); lua_pop(ctx->L,1);}
+    }else lua_pop(ctx->L,1);
+    ctx->lua_ok=true;
+    ctx->initialized=true;
+    ctx->is_pico = detected_pico;
+    ctx->last_tick_us=esp_timer_get_time();
+    ctx->fps_last_us=esp_timer_get_time();
+    ctx->fps_frames=0;
+    printf("[LuaGame] init done OK from %s (pico=%d)\n",loaded_from, ctx->is_pico?1:0);
+
+    // Initial draw for on-demand games
+    lua_getglobal(ctx->L,"draw");
+    if(lua_isfunction(ctx->L,-1)){
+        if(lua_pcall(ctx->L,0,0,0)!=LUA_OK){
+            const char* e=lua_tostring(ctx->L,-1);
+            printf("[LUA ERR initial draw] %s\n",e);
+            lua_pop(ctx->L,1);
+        }
+    } else lua_pop(ctx->L,1);
+    if(tt_lvgl_lock(pdMS_TO_TICKS(1000))){
+        invalidate_canvas(ctx);
+        tt_lvgl_unlock();
+    }
+
+    printf("[LuaGame] entering game loop in same task\n");
+
+    // Enter game loop directly - on-demand for solitaire (no frame updates)
+    while(!ctx->should_exit){
+        if(ctx->lua_ok && ctx->initialized && ctx->L){
+            uint64_t now=esp_timer_get_time();
+            float dt= ctx->last_tick_us==0? (TICK_MS/1000.0f) : (now-ctx->last_tick_us)/1000000.0f;
+            if(dt>0.1f) dt=0.1f;
+            ctx->last_tick_us=now;
+            lua_State* L=ctx->L;
+            bool should_draw = false;
+
+            if(ctx->is_pico){
+                bool has_touch_event = false;
+                int ev_type = 6;
+                if(!ctx->prev_touch_pressed && ctx->touch_pressed){
+                    ev_type = 1; has_touch_event = true;
+                } else if(ctx->prev_touch_pressed && !ctx->touch_pressed){
+                    ev_type = 3; has_touch_event = true;
+                } else if(ctx->touch_pressed){
+                    ev_type = 2; has_touch_event = true;
+                }
+
+                if(ctx->wants_frame_updates){
+                    // Continuous: handle touch event if any, then FRAME_TICK every frame
+                    if(has_touch_event){
+                        lua_getglobal(L,"update");
+                        if(lua_isfunction(L,-1)){
+                            lua_newtable(L);
+                            lua_pushinteger(L, ev_type); lua_setfield(L,-2,"type");
+                            lua_pushinteger(L, ctx->touch_x); lua_setfield(L,-2,"x");
+                            lua_pushinteger(L, ctx->touch_y); lua_setfield(L,-2,"y");
+                            lua_pushboolean(L,1); lua_setfield(L,-2,"valid");
+                            lua_pushinteger(L,0); lua_setfield(L,-2,"button_id");
+                            if(lua_pcall(L,1,1,0)!=LUA_OK){const char* e=lua_tostring(L,-1); printf("[LUA ERR update] %s\n",e); lua_pop(L,1); ctx->lua_ok=false;}
+                            else { bool r=lua_toboolean(L,-1); lua_pop(L,1); if(r) should_draw=true; }
+                        } else lua_pop(L,1);
+                    }
+                    // FRAME_TICK
+                    lua_getglobal(L,"update");
+                    if(lua_isfunction(L,-1)){
+                        lua_newtable(L);
+                        lua_pushinteger(L, 6); lua_setfield(L,-2,"type");
+                        lua_pushinteger(L, ctx->touch_x); lua_setfield(L,-2,"x");
+                        lua_pushinteger(L, ctx->touch_y); lua_setfield(L,-2,"y");
+                        lua_pushboolean(L,1); lua_setfield(L,-2,"valid");
+                        if(lua_pcall(L,1,1,0)!=LUA_OK){const char* e=lua_tostring(L,-1); printf("[LUA ERR update FRAME] %s\n",e); lua_pop(L,1); ctx->lua_ok=false;}
+                        else { bool r=lua_toboolean(L,-1); lua_pop(L,1); if(r) should_draw=true; }
+                    } else lua_pop(L,1);
+                } else {
+                    // On-demand: only when touch event
+                    if(has_touch_event){
+                        lua_getglobal(L,"update");
+                        if(lua_isfunction(L,-1)){
+                            lua_newtable(L);
+                            lua_pushinteger(L, ev_type); lua_setfield(L,-2,"type");
+                            lua_pushinteger(L, ctx->touch_x); lua_setfield(L,-2,"x");
+                            lua_pushinteger(L, ctx->touch_y); lua_setfield(L,-2,"y");
+                            lua_pushboolean(L,1); lua_setfield(L,-2,"valid");
+                            lua_pushinteger(L,0); lua_setfield(L,-2,"button_id");
+                            if(lua_pcall(L,1,1,0)!=LUA_OK){const char* e=lua_tostring(L,-1); printf("[LUA ERR update] %s\n",e); lua_pop(L,1); ctx->lua_ok=false;}
+                            else { bool r=lua_toboolean(L,-1); lua_pop(L,1); if(r) should_draw=true; }
+                        } else lua_pop(L,1);
+                    }
+                }
+                ctx->prev_touch_pressed = ctx->touch_pressed;
+            } else {
+                // Original sys API - continuous
+                lua_getglobal(L,"update");
+                if(lua_isfunction(L,-1)){
+                    lua_pushnumber(L,dt);
+                    if(lua_pcall(L,1,0,0)!=LUA_OK){const char* e=lua_tostring(L,-1); printf("[LUA ERR update] %s\n",e); lua_pop(L,1); ctx->lua_ok=false;}
+                }else lua_pop(L,1);
+                should_draw = true;
+            }
+
+            if(should_draw){
+                lua_getglobal(L,"draw");
+                if(lua_isfunction(L,-1)){
+                    if(lua_pcall(L,0,0,0)!=LUA_OK){const char* e=lua_tostring(L,-1); printf("[LUA ERR draw] %s\n",e); lua_pop(L,1); ctx->lua_ok=false;}
+                }else lua_pop(L,1);
+            if(tt_lvgl_lock(pdMS_TO_TICKS(1000))){
+                invalidate_canvas(ctx);
+                ctx->fps_frames++;
+                uint64_t elapsed = now - ctx->fps_last_us;
+                if(elapsed >= 1000000){
+                    ctx->fps = (float)ctx->fps_frames * 1000000.0f / (float)elapsed;
+                    printf("[LuaGame] FPS %.1f (on-demand)\n", ctx->fps);
+                    if(ctx->fps_label){
+                        char buf[32];
+                        snprintf(buf,sizeof(buf),"FPS %.0f",ctx->fps);
+                        lv_label_set_text(ctx->fps_label, buf);
+                    }
+                    ctx->fps_frames=0;
+                    ctx->fps_last_us=now;
+                }
+                tt_lvgl_unlock();
+            } else {
+                printf("[LuaGame] lvgl lock timeout\n");
+            }
+            }
+        }
+        // For on-demand games, sleep longer to save CPU
+        if(ctx->is_pico && !ctx->wants_frame_updates){
+            vTaskDelay(pdMS_TO_TICKS(50));
+        } else {
+            vTaskDelay(pdMS_TO_TICKS(TICK_MS));
+        }
+    }
+    printf("[LuaGame] game loop exit\n");
+    vTaskDelete(NULL);
+}
+static void game_loop_task(void* arg){
+    AppCtx* ctx=(AppCtx*)arg;
+    printf("[LuaGame] game loop task start\n");
+    while(!ctx->should_exit){
+        if(ctx->lua_ok && ctx->initialized && ctx->L){
+            uint64_t now=esp_timer_get_time();
+            float dt= ctx->last_tick_us==0? (TICK_MS/1000.0f) : (now-ctx->last_tick_us)/1000000.0f;
+            if(dt>0.1f) dt=0.1f; // clamp
+            ctx->last_tick_us=now;
+            lua_State* L=ctx->L;
+            lua_getglobal(L,"update");
+            if(lua_isfunction(L,-1)){
+                lua_pushnumber(L,dt);
+                if(lua_pcall(L,1,0,0)!=LUA_OK){const char* e=lua_tostring(L,-1); printf("[LUA ERR update] %s\n",e); lua_pop(L,1); ctx->lua_ok=false;}
+            }else lua_pop(L,1);
+            lua_getglobal(L,"draw");
+            if(lua_isfunction(L,-1)){
+                if(lua_pcall(L,0,0,0)!=LUA_OK){const char* e=lua_tostring(L,-1); printf("[LUA ERR draw] %s\n",e); lua_pop(L,1); ctx->lua_ok=false;}
+            }else lua_pop(L,1);
+            // Invalidate canvas with LVGL lock
+            if(tt_lvgl_lock(pdMS_TO_TICKS(1000))){
+                invalidate_canvas(ctx);
+                // fps tracking inside lock for label update
+                ctx->fps_frames++;
+                uint64_t elapsed = now - ctx->fps_last_us;
+                if(elapsed >= 1000000){
+                    ctx->fps = (float)ctx->fps_frames * 1000000.0f / (float)elapsed;
+                    printf("[LuaGame] FPS %.1f\n", ctx->fps);
+                    if(ctx->fps_label){
+                        char buf[32];
+                        snprintf(buf,sizeof(buf),"FPS %.0f",ctx->fps);
+                        lv_label_set_text(ctx->fps_label, buf);
+                    }
+                    ctx->fps_frames=0;
+                    ctx->fps_last_us=now;
+                }
+                tt_lvgl_unlock();
+            }
+        }
+        vTaskDelay(pdMS_TO_TICKS(TICK_MS));
+    }
+    printf("[LuaGame] game loop task exit\n");
+    vTaskDelete(NULL);
+}
+static void touch_event_cb(lv_event_t* e){
+    AppCtx* ctx=(AppCtx*)lv_event_get_user_data(e);
+    if(!ctx)return;
+    lv_event_code_t code=lv_event_get_code(e);
+    lv_point_t pt; lv_indev_get_point(lv_indev_active(),&pt);
+    int max_w = ctx->game_w ? ctx->game_w : GAME_W_DEFAULT;
+    int max_h = ctx->game_h ? ctx->game_h : GAME_H_DEFAULT;
+    if(ctx->canvas){
+        lv_area_t area; lv_obj_get_coords(ctx->canvas,&area);
+        int lx=pt.x-area.x1;
+        int ly=pt.y-area.y1;
+        if(lx<0) lx=0;
+        if(lx>=max_w) lx=max_w-1;
+        if(ly<0) ly=0;
+        if(ly>=max_h) ly=max_h-1;
+        ctx->touch_x=lx; ctx->touch_y=ly;
+    }else{ctx->touch_x=pt.x; ctx->touch_y=pt.y;}
+    if(code==LV_EVENT_PRESSED){
+        // Top-right corner 40x40 as exit gesture (since no toolbar)
+        if(ctx->touch_x > max_w - 40 && ctx->touch_y < 40){
+            printf("[LuaGame] exit gesture top-right tap -> stopping app\n");
+            tt_app_stop();
+            return;
+        }
+    }
+    if(code==LV_EVENT_PRESSING||code==LV_EVENT_PRESSED||code==LV_EVENT_CLICKED) ctx->touch_pressed=true;
+    else if(code==LV_EVENT_RELEASED||code==LV_EVENT_PRESS_LOST) ctx->touch_pressed=false;
+}
+static void* app_create_data(void){return calloc(1,sizeof(AppCtx));}
+static void app_destroy_data(void* d){
+    AppCtx* ctx=d; if(!ctx)return;
+    ctx->should_exit=true;
+    if(ctx->L) lua_close(ctx->L);
+    if(ctx->fb) heap_caps_free(ctx->fb);
+    free(ctx);
+}
+static void app_on_create(AppHandle a,void* d){AppCtx* c=d; if(c) c->app=a;}
+static void app_on_destroy(AppHandle a,void* d){(void)a;(void)d;}
+static void app_on_show(AppHandle app,void* data,lv_obj_t* parent){
+    AppCtx* ctx=data; if(!ctx)return;
+    g_ctx=ctx;
+    ctx->app=app; ctx->lua_ok=false; ctx->initialized=false; ctx->should_exit=false;
+    ctx->fps=0; ctx->fps_frames=0;
+
+    // Fullscreen: no toolbar, no statusbar (manifest HideStatusBar)
+    lv_obj_remove_flag(parent,LV_OBJ_FLAG_SCROLLABLE);
+    lv_obj_set_style_pad_all(parent,0,0);
+    lv_obj_set_style_bg_color(parent,lv_color_black(),0);
+    lv_obj_set_flex_flow(parent,LV_FLEX_FLOW_COLUMN);
+    lv_obj_set_style_pad_row(parent,0,0);
+    ctx->toolbar=NULL;
+    ctx->root=parent;
+
+    // Get display resolution for dynamic framebuffer (320x480 on ES3C35P)
+    lv_coord_t disp_w = lv_display_get_horizontal_resolution(NULL);
+    lv_coord_t disp_h = lv_display_get_vertical_resolution(NULL);
+    if(disp_w<=0) disp_w = 320;
+    if(disp_h<=0) disp_h = 480;
+    ctx->game_w = disp_w;
+    ctx->game_h = disp_h;
+    ctx->fb_w = disp_w;
+    ctx->fb_h = disp_h;
+    printf("[LuaGame] display %dx%d fullscreen, no toolbar\n", (int)disp_w, (int)disp_h);
+
+    ctx->game_area=lv_obj_create(parent);
+    lv_obj_set_width(ctx->game_area,LV_PCT(100));
+    lv_obj_set_flex_grow(ctx->game_area,1);
+    lv_obj_set_style_bg_color(ctx->game_area,lv_color_black(),0);
+    lv_obj_set_style_border_width(ctx->game_area,0,0);
+    lv_obj_set_style_pad_all(ctx->game_area,0,0);
+    lv_obj_set_flex_flow(ctx->game_area,LV_FLEX_FLOW_COLUMN);
+    lv_obj_set_flex_align(ctx->game_area,LV_FLEX_ALIGN_CENTER,LV_FLEX_ALIGN_CENTER,LV_FLEX_ALIGN_CENTER);
+    lv_obj_remove_flag(ctx->game_area,LV_OBJ_FLAG_SCROLLABLE);
+    lv_obj_add_flag(ctx->game_area,LV_OBJ_FLAG_CLICKABLE);
+    size_t fb_bytes=(size_t)ctx->fb_w * ctx->fb_h * sizeof(uint16_t);
+    ctx->fb=alloc_psram(fb_bytes);
+    if(!ctx->fb){printf("[LuaGame] FB alloc fail %dx%d\n", ctx->fb_w, ctx->fb_h); return;}
+    memset(ctx->fb,0,fb_bytes);
+    lv_obj_t* cont=lv_obj_create(ctx->game_area);
+    lv_obj_set_size(cont,ctx->fb_w,ctx->fb_h);
+    lv_obj_set_style_bg_color(cont,lv_color_black(),0);
+    lv_obj_set_style_border_width(cont,0,0);
+    lv_obj_set_style_pad_all(cont,0,0);
+    lv_obj_remove_flag(cont,LV_OBJ_FLAG_SCROLLABLE);
+    lv_obj_set_style_radius(cont,0,0);
+    ctx->canvas=lv_canvas_create(cont);
+    lv_canvas_set_buffer(ctx->canvas,ctx->fb,ctx->fb_w,ctx->fb_h,LV_COLOR_FORMAT_RGB565);
+    lv_obj_set_style_bg_opa(ctx->canvas,LV_OPA_COVER,0);
+    lv_obj_remove_flag(ctx->canvas,LV_OBJ_FLAG_SCROLLABLE);
+    // Label layer removed to save RAM - text now drawn directly to FB
+    ctx->label_layer=NULL;
+    // FPS label kept small but optional - remove to save RAM for solitaire
+    // For now, keep disabled to save internal memory
+    ctx->fps_label=NULL;
+    // If you want FPS, uncomment:
+    // ctx->fps_label=lv_label_create(ctx->game_area);
+    // lv_label_set_text(ctx->fps_label,"FPS --");
+    // lv_obj_set_style_text_color(ctx->fps_label, lv_color_white(),0);
+
+    lv_obj_add_event_cb(ctx->game_area,touch_event_cb,LV_EVENT_PRESSED,ctx);
+    lv_obj_add_event_cb(ctx->game_area,touch_event_cb,LV_EVENT_PRESSING,ctx);
+    lv_obj_add_event_cb(ctx->game_area,touch_event_cb,LV_EVENT_RELEASED,ctx);
+    lv_obj_add_event_cb(ctx->game_area,touch_event_cb,LV_EVENT_PRESS_LOST,ctx);
+    lv_obj_add_event_cb(ctx->game_area,touch_event_cb,LV_EVENT_SHORT_CLICKED,ctx);
+    lv_obj_add_event_cb(cont,touch_event_cb,LV_EVENT_PRESSED,ctx);
+    lv_obj_add_event_cb(cont,touch_event_cb,LV_EVENT_PRESSING,ctx);
+    lv_obj_add_event_cb(cont,touch_event_cb,LV_EVENT_RELEASED,ctx);
+    lv_obj_add_event_cb(cont,touch_event_cb,LV_EVENT_PRESS_LOST,ctx);
+    printf("[LuaGame] spawning init task\n");
+    BaseType_t ret = xTaskCreate(lua_init_task,"lua_init",8192,ctx,5,&ctx->lua_task);
+    printf("[LuaGame] init task create ret=%d\n", ret);
+    fill_rect(ctx,0,0,ctx->fb_w,ctx->fb_h,hex_to_rgb565(0x1e1e2e),true);
+    if(tt_lvgl_lock(pdMS_TO_TICKS(1000))){
+        invalidate_canvas(ctx);
+        tt_lvgl_unlock();
+    }
+    printf("[LuaGame] on_show done\n");
+}
+static void app_on_hide(AppHandle app,void* data){
+    (void)app;
+    AppCtx* ctx=data; if(!ctx)return;
+    ctx->should_exit=true;
+    vTaskDelay(200/portTICK_PERIOD_MS);
+    audio_deinit();
+    if(ctx->L){lua_close(ctx->L); ctx->L=NULL;}
+    ctx->canvas=NULL; ctx->label_layer=NULL; ctx->fps_label=NULL; ctx->game_area=NULL; ctx->root=NULL; ctx->toolbar=NULL;
+    g_ctx=NULL;
+    printf("[LuaGame] on_hide\n");
+}
+int main(int argc,char* argv[]){
+    (void)argc;(void)argv;
+    tt_app_register((AppRegistration){
+        .createData=app_create_data,
+        .destroyData=app_destroy_data,
+        .onCreate=app_on_create,
+        .onDestroy=app_on_destroy,
+        .onShow=app_on_show,
+        .onHide=app_on_hide
+    });
+    return 0;
+}
@@ -0,0 +1,9 @@
+manifest.version=0.2
+target.sdk=0.8.0-dev
+target.platforms=esp32s3
+app.id=one.tactility.luagame
+app.version.name=0.2.0
+app.version.code=2
+app.name=Lua Game
+app.description=Lua interpreter game engine - fullscreen, no chrome
+app.flags=HideStatusBar
@@ -2,5 +2,6 @@ file(GLOB_RECURSE SOURCE_FILES Source/*.c)

 idf_component_register(
    SRCS ${SOURCE_FILES}
-    REQUIRES TactilitySDK
+    REQUIRES TactilitySDK esp_http_client
 )
+target_compile_options(${COMPONENT_LIB} PRIVATE -Wno-deprecated-declarations -Wno-unused-but-set-variable -Wno-format-truncation)
@@ -1,19 +0,0 @@
-# PipecatVoice — Tactility native voice companion
-
-Native ESP32 ELF app (like VoiceRecorder/ReynaBot), not a web client.
-
- Uses `audio-stream`/`i2s_controller` APIs (see VoiceRecorder) for 16kHz PCM mic + speaker
- Uses ReynaBot's `websocket.c/h` + `lwip` for WS transport
- Default gateway: Hermes WS `ws://<mac>:8642/api/esp32/voice/ws` (voice profile, limited tools, imperfect STT)
- Optional second target: Pipecat websocket transport `ws://<mac>:7861` (when server exposes `websocket` via `create_transport`)
-
-Build:
-```
-unset PYTHONPATH; export IDF_PYTHON_ENV_PATH=~/.espressif/python_env/idf5.3_py3.9_env
-. ~/esp/esp-idf/export.sh
-export TACTILITY_SDK_PATH=~/Projects/electronics/tactility/tactility/Buildscripts/TactilitySDK  # or firmware/release/TactilitySDK if built
-$IDF_PYTHON_ENV_PATH/bin/python tactility.py Apps/PipecatVoice build esp32s3 --local-sdk
-$IDF_PYTHON_ENV_PATH/bin/python tactility.py Apps/PipecatVoice install 192.168.68.112 esp32s3
-```
-
-Adapted from ReynaBot (PTT + I2S + WS JSON events: ready/listening/transcript/thinking/response_text/audio_start/audio_end/done/error).
@@ -1,830 +0,0 @@
-#include <tt_app.h>
-#include <tt_lvgl.h>
-#include <tt_lvgl_toolbar.h>
-#include <tt_wifi.h>
-
-#include <tactility/device.h>
-#include <tactility/drivers/i2s_controller.h>
-
-#include "websocket.h"
-#include <cJSON.h>
-
-#include <string.h>
-#include <stdlib.h>
-#include <sys/stat.h>
-#include <errno.h>
-
-#include "freertos/FreeRTOS.h"
-#include "freertos/task.h"
-#include "esp_log.h"
-
-#define TAG "PipecatVoice"
-
-typedef enum {
-    STATE_IDLE,
-    STATE_CONNECTING,
-    STATE_LISTENING,
-    STATE_THINKING,
-    STATE_SPEAKING,
-    STATE_ERROR
-} PipecatVoiceState;
-
-typedef struct {
-    AppHandle app;
-    bool visible;
-    PipecatVoiceState state;
-    char server_url[128];
-    char device_id[64];
-    char api_key[128];
-    
-    char last_transcript[256];
-    char last_response[512];
-    char error_message[128];
-    
-    // UI components
-    lv_obj_t* lbl_status;
-    lv_obj_t* lbl_transcript;
-    lv_obj_t* lbl_response;
-    lv_obj_t* btn_ptt;
-    lv_obj_t* btn_ptt_label;
-    lv_obj_t* btn_grace;
-    lv_obj_t* btn_elias;
-    
-    bool speaker_selected;
-    lv_obj_t* speaker_select_cont;
-    lv_obj_t* app_main_cont;
-    
-    // PTT control
-    bool is_pressed;
-    bool start_session;
-    bool stop_session;
-    bool cancel_session;
-    
-    // FreeRTOS Tasks
-    TaskHandle_t worker_task;
-    TaskHandle_t rx_task;
-    
-    // Hardware
-    struct Device* i2s_dev;
-    
-    // WebSocket
-    int ws_fd;
-    bool ws_connected;
-    bool ws_done;
-    
-    bool ui_update_pending;
-} PipecatVoiceCtx;
-
-/* ─── Forward Declarations ─── */
-static void pipecatvoice_task(void* arg);
-static void pipecatvoice_rx_task(void* arg);
-static void update_ui(PipecatVoiceCtx* ctx);
-static void load_config(PipecatVoiceCtx* ctx);
-
-/* ─── Helper for URL parsing ─── */
-static bool parse_ws_url(const char* url, char* host, int* port, char* path) {
-    if (strncmp(url, "ws://", 5) != 0) return false;
-    const char* p = url + 5;
-    const char* colon = strchr(p, ':');
-    const char* slash = strchr(p, '/');
-    
-    if (slash == NULL) {
-        strcpy(path, "/");
-    } else {
-        strcpy(path, slash);
-    }
-    
-    if (colon != NULL && (slash == NULL || colon < slash)) {
-        int host_len = colon - p;
-        memcpy(host, p, host_len);
-        host[host_len] = '\0';
-        *port = atoi(colon + 1);
-    } else {
-        int host_len = slash ? (slash - p) : strlen(p);
-        memcpy(host, p, host_len);
-        host[host_len] = '\0';
-        *port = 80;
-    }
-    return true;
-}
-
-/* ─── Config Loading/Saving ─── */
-static void load_config(PipecatVoiceCtx* ctx) {
-    // Default fallback config
-    snprintf(ctx->server_url, sizeof(ctx->server_url), "ws://192.168.68.102:8642/api/esp32/voice/ws");
-    snprintf(ctx->device_id, sizeof(ctx->device_id), "pipecatvoice");
-    snprintf(ctx->api_key, sizeof(ctx->api_key), "mcT1YA1vOr9wXSiHpCYalweEGGZKX-PIfZv2drp8BSg");
-    
-    char path[256];
-    size_t path_size = sizeof(path);
-    tt_app_get_user_data_child_path(ctx->app, "config.json", path, &path_size);
-    
-    FILE* file = fopen(path, "r");
-    if (file == NULL) {
-        // Create user data directory if it doesn't exist
-        char dir_path[256];
-        size_t dir_size = sizeof(dir_path);
-        tt_app_get_user_data_path(ctx->app, dir_path, &dir_size);
-        mkdir(dir_path, 0755);
-        
-        // Write default config file
-        file = fopen(path, "w");
-        if (file != NULL) {
-            fprintf(file, "{\n  \"server_url\": \"ws://192.168.68.102:8642/api/esp32/voice/ws\",\n  \"device_id\": \"pipecatvoice\",\n  \"api_key\": \"mcT1YA1vOr9wXSiHpCYalweEGGZKX-PIfZv2drp8BSg\"\n}\n");
-            fclose(file);
-        }
-        ESP_LOGI(TAG, "Created default config.json at %s", path);
-        return;
-    }
-    
-    fseek(file, 0, SEEK_END);
-    long size = ftell(file);
-    fseek(file, 0, SEEK_SET);
-    
-    if (size > 0 && size < 4096) {
-        char* buf = malloc(size + 1);
-        if (buf != NULL) {
-            size_t read_bytes = fread(buf, 1, size, file);
-            buf[read_bytes] = '\0';
-            cJSON* json = cJSON_Parse(buf);
-            if (json != NULL) {
-                cJSON* url_item = cJSON_GetObjectItem(json, "server_url");
-                if (url_item != NULL && url_item->valuestring != NULL) {
-                    strncpy(ctx->server_url, url_item->valuestring, sizeof(ctx->server_url) - 1);
-                }
-                cJSON* dev_item = cJSON_GetObjectItem(json, "device_id");
-                if (dev_item != NULL && dev_item->valuestring != NULL) {
-                    strncpy(ctx->device_id, dev_item->valuestring, sizeof(ctx->device_id) - 1);
-                }
-                cJSON* key_item = cJSON_GetObjectItem(json, "api_key");
-                if (key_item != NULL && key_item->valuestring != NULL) {
-                    strncpy(ctx->api_key, key_item->valuestring, sizeof(ctx->api_key) - 1);
-                }
-                cJSON_Delete(json);
-            }
-            free(buf);
-        }
-    }
-    fclose(file);
-    ESP_LOGI(TAG, "Loaded config: server=%s device=%s", ctx->server_url, ctx->device_id);
-}
-
-/* ─── JSON Message Processing ─── */
-static void parse_json_message(PipecatVoiceCtx* ctx, const char* json_str) {
-    cJSON* json = cJSON_Parse(json_str);
-    if (json == NULL) return;
-    
-    cJSON* evt_item = cJSON_GetObjectItem(json, "event");
-    if (evt_item != NULL && evt_item->valuestring != NULL) {
-        const char* evt = evt_item->valuestring;
-        ESP_LOGI(TAG, "WS Event: %s", evt);
-        
-        if (strcmp(evt, "ready") == 0) {
-            ESP_LOGI(TAG, "Server ready");
-        } else if (strcmp(evt, "listening") == 0) {
-            ctx->state = STATE_LISTENING;
-            ctx->ui_update_pending = true;
-        } else if (strcmp(evt, "transcript") == 0) {
-            cJSON* txt_item = cJSON_GetObjectItem(json, "text");
-            if (txt_item != NULL && txt_item->valuestring != NULL) {
-                strncpy(ctx->last_transcript, txt_item->valuestring, sizeof(ctx->last_transcript) - 1);
-                ctx->ui_update_pending = true;
-            }
-        } else if (strcmp(evt, "thinking") == 0) {
-            ctx->state = STATE_THINKING;
-            ctx->ui_update_pending = true;
-        } else if (strcmp(evt, "response_text") == 0) {
-            cJSON* txt_item = cJSON_GetObjectItem(json, "text");
-            if (txt_item != NULL && txt_item->valuestring != NULL) {
-                strncpy(ctx->last_response, txt_item->valuestring, sizeof(ctx->last_response) - 1);
-                ctx->ui_update_pending = true;
-            }
-        } else if (strcmp(evt, "audio_start") == 0) {
-            ctx->state = STATE_SPEAKING;
-            ctx->ui_update_pending = true;
-            
-            // I2S is already configured globally at session startup
-        } else if (strcmp(evt, "audio_end") == 0) {
-            ESP_LOGI(TAG, "Audio response ended");
-        } else if (strcmp(evt, "done") == 0) {
-            ctx->ws_done = true;
-        } else if (strcmp(evt, "error") == 0) {
-            cJSON* msg_item = cJSON_GetObjectItem(json, "message");
-            if (msg_item != NULL && msg_item->valuestring != NULL) {
-                strncpy(ctx->error_message, msg_item->valuestring, sizeof(ctx->error_message) - 1);
-            } else {
-                snprintf(ctx->error_message, sizeof(ctx->error_message), "Unknown server error");
-            }
-            ctx->state = STATE_ERROR;
-            ctx->ui_update_pending = true;
-        }
-    }
-    cJSON_Delete(json);
-}
-
-/* ─── WebSocket RX (Receive) Task ─── */
-static void pipecatvoice_rx_task(void* arg) {
-    PipecatVoiceCtx* ctx = (PipecatVoiceCtx*)arg;
-    uint8_t* rx_buf = malloc(8192);
-    if (rx_buf == NULL) {
-        ESP_LOGE(TAG, "Failed to allocate RX buffer");
-        ctx->ws_done = true;
-        ctx->rx_task = NULL;
-        vTaskDelete(NULL);
-        return;
-    }
-    int opcode;
-    
-    ESP_LOGI(TAG, "WS Receive task started");
-    
-    while (ctx->ws_fd >= 0) {
-        int r = ws_recv(ctx->ws_fd, &opcode, rx_buf, 8191);
-        if (r < 0) {
-            if (r == -1) {
-                ESP_LOGI(TAG, "WS connection closed or read error, errno=%d", errno);
-            } else {
-                ESP_LOGE(TAG, "WS rx buffer overflow");
-            }
-            ctx->ws_done = true;
-            break;
-        }
-        
-        if (opcode == 0x01) { // Text frame (JSON)
-            rx_buf[r] = '\0';
-            parse_json_message(ctx, (char*)rx_buf);
-        } else if (opcode == 0x02) { // Binary frame (Audio data)
-            if (ctx->state == STATE_SPEAKING && ctx->i2s_dev != NULL) {
-                const uint8_t* payload_ptr = rx_buf;
-                size_t payload_len = r;
-                
-                // Skip WAV header if present in the first chunk
-                if (payload_len > 44 && memcmp(payload_ptr, "RIFF", 4) == 0) {
-                    payload_ptr += 44;
-                    payload_len -= 44;
-                }
-                
-                size_t written = 0;
-                device_lock(ctx->i2s_dev);
-                i2s_controller_write(ctx->i2s_dev, payload_ptr, payload_len, &written, pdMS_TO_TICKS(100));
-                device_unlock(ctx->i2s_dev);
-            }
-        } else if (opcode == 0x09) { // PING frame
-            ESP_LOGI(TAG, "WS PING received, sending PONG");
-            ws_send_pong(ctx->ws_fd, rx_buf, r);
-        }
-    }
-    
-    free(rx_buf);
-    ctx->rx_task = NULL;
-    vTaskDelete(NULL);
-}
-
-/* ─── UI Speaker Selection Event Callback ─── */
-static void speaker_event_cb(lv_event_t* e) {
-    PipecatVoiceCtx* ctx = (PipecatVoiceCtx*)lv_event_get_user_data(e);
-    lv_obj_t* target = lv_event_get_target(e);
-    lv_event_code_t code = lv_event_get_code(e);
-    
-    if (code == LV_EVENT_CLICKED && !ctx->speaker_selected) {
-        if (target == ctx->btn_grace) {
-            strcpy(ctx->device_id, "grace-pipecat");
-        } else if (target == ctx->btn_elias) {
-            strcpy(ctx->device_id, "elias-pipecat");
-        }
-        
-        ctx->speaker_selected = true;
-        
-        // Hide selection screen, show main screen
-        lv_obj_add_flag(ctx->speaker_select_cont, LV_OBJ_FLAG_HIDDEN);
-        lv_obj_remove_flag(ctx->app_main_cont, LV_OBJ_FLAG_HIDDEN);
-        
-        // Trigger UI update to refresh status and PTT button
-        ctx->ui_update_pending = true;
-    }
-}
-
-/* ─── UI Press-to-Talk Event Callback ─── */
-static void ptt_event_cb(lv_event_t* e) {
-    PipecatVoiceCtx* ctx = (PipecatVoiceCtx*)lv_event_get_user_data(e);
-    lv_event_code_t code = lv_event_get_code(e);
-    
-    if (code == LV_EVENT_PRESSED) {
-        ctx->is_pressed = true;
-        if (ctx->state == STATE_IDLE || ctx->state == ERROR_NONE) {
-            ctx->start_session = true;
-        }
-    } else if (code == LV_EVENT_RELEASED || code == LV_EVENT_PRESS_LOST) {
-        ctx->is_pressed = false;
-        if (ctx->state == STATE_LISTENING) {
-            ctx->stop_session = true;
-        } else if (ctx->state == STATE_CONNECTING) {
-            ctx->cancel_session = true;
-        }
-    }
-}
-
-/* ─── Core UI Update Function ─── */
-static void update_ui(PipecatVoiceCtx* ctx) {
-    if (!ctx->visible) return;
-    
-    if (tt_lvgl_lock(pdMS_TO_TICKS(500))) {
-        if (!ctx->visible) {
-            tt_lvgl_unlock();
-            return;
-        }
-        
-        if (!ctx->speaker_selected) {
-            lv_label_set_text(ctx->lbl_status, "Choose Speaker");
-            lv_obj_set_style_text_color(ctx->lbl_status, lv_color_hex(0x9E9E9E), LV_PART_MAIN);
-            tt_lvgl_unlock();
-            return;
-        }
-        
-        switch (ctx->state) {
-            case STATE_IDLE:
-                lv_label_set_text(ctx->lbl_status, "Ready");
-                lv_obj_set_style_text_color(ctx->lbl_status, lv_color_hex(0x9E9E9E), LV_PART_MAIN);
-                lv_label_set_text(ctx->btn_ptt_label, LV_SYMBOL_AUDIO " Hold to Talk");
-                lv_obj_set_style_bg_color(ctx->btn_ptt, lv_color_hex(0x6200EE), LV_PART_MAIN);
-                lv_obj_remove_flag(ctx->btn_ptt, LV_OBJ_FLAG_HIDDEN);
-                break;
-            case STATE_CONNECTING:
-                lv_label_set_text(ctx->lbl_status, "Connecting...");
-                lv_obj_set_style_text_color(ctx->lbl_status, lv_color_hex(0xFFC107), LV_PART_MAIN);
-                lv_label_set_text(ctx->btn_ptt_label, "Connecting...");
-                lv_obj_set_style_bg_color(ctx->btn_ptt, lv_color_hex(0x757575), LV_PART_MAIN);
-                lv_obj_remove_flag(ctx->btn_ptt, LV_OBJ_FLAG_HIDDEN);
-                break;
-            case STATE_LISTENING:
-                lv_label_set_text(ctx->lbl_status, "Listening...");
-                lv_obj_set_style_text_color(ctx->lbl_status, lv_color_hex(0x00E676), LV_PART_MAIN);
-                lv_label_set_text(ctx->btn_ptt_label, "Release to Stop");
-                lv_obj_set_style_bg_color(ctx->btn_ptt, lv_color_hex(0xD50000), LV_PART_MAIN);
-                lv_obj_remove_flag(ctx->btn_ptt, LV_OBJ_FLAG_HIDDEN);
-                break;
-            case STATE_THINKING:
-                lv_label_set_text(ctx->lbl_status, "Thinking...");
-                lv_obj_set_style_text_color(ctx->lbl_status, lv_color_hex(0x00B0FF), LV_PART_MAIN);
-                lv_obj_add_flag(ctx->btn_ptt, LV_OBJ_FLAG_HIDDEN);
-                break;
-            case STATE_SPEAKING:
-                lv_label_set_text(ctx->lbl_status, "Speaking...");
-                lv_obj_set_style_text_color(ctx->lbl_status, lv_color_hex(0xAA00FF), LV_PART_MAIN);
-                lv_obj_add_flag(ctx->btn_ptt, LV_OBJ_FLAG_HIDDEN);
-                break;
-            case STATE_ERROR:
-                lv_label_set_text(ctx->lbl_status, "Error");
-                lv_obj_set_style_text_color(ctx->lbl_status, lv_color_hex(0xFF1744), LV_PART_MAIN);
-                lv_label_set_text(ctx->btn_ptt_label, LV_SYMBOL_REFRESH " Try Again");
-                lv_obj_set_style_bg_color(ctx->btn_ptt, lv_color_hex(0xFF1744), LV_PART_MAIN);
-                lv_obj_remove_flag(ctx->btn_ptt, LV_OBJ_FLAG_HIDDEN);
-                
-                // Show the full error message in the bot's response bubble
-                if (ctx->error_message[0] != '\0') {
-                    snprintf(ctx->last_response, sizeof(ctx->last_response), "Error: %s", ctx->error_message);
-                }
-                break;
-        }
-        
-        lv_label_set_text(ctx->lbl_transcript, ctx->last_transcript[0] != '\0' ? ctx->last_transcript : "(Your question will appear here)");
-        lv_label_set_text(ctx->lbl_response, ctx->last_response[0] != '\0' ? ctx->last_response : "(Answer will appear here)");
-        
-        tt_lvgl_unlock();
-    }
-}
-
-/* ─── Streaming & Main Worker Task ─── */
-static void pipecatvoice_task(void* arg) {
-    PipecatVoiceCtx* ctx = (PipecatVoiceCtx*)arg;
-    char host[64];
-    char path[128];
-    int port = 80;
-    
-    ctx->ws_fd = -1;
-    
-    
-    while (ctx->visible) {
-        if (ctx->start_session) {
-            ctx->start_session = false;
-            ctx->stop_session = false;
-            ctx->cancel_session = false;
-            
-            ctx->state = STATE_CONNECTING;
-            ctx->last_transcript[0] = '\0';
-            ctx->last_response[0] = '\0';
-            ctx->error_message[0] = '\0';
-            ctx->ws_done = false;
-            update_ui(ctx);
-            
-            if (!parse_ws_url(ctx->server_url, host, &port, path)) {
-                ctx->state = STATE_ERROR;
-                snprintf(ctx->error_message, sizeof(ctx->error_message), "Invalid Server URL");
-                update_ui(ctx);
-                continue;
-            }
-            
-            ESP_LOGI(TAG, "Connecting: host=%s port=%d path=%s", host, port, path);
-            int fd = ws_connect(host, port, path, ctx->device_id, ctx->api_key);
-            if (fd < 0) {
-                ctx->state = STATE_ERROR;
-                snprintf(ctx->error_message, sizeof(ctx->error_message), "Connect failed");
-                update_ui(ctx);
-                continue;
-            }
-            
-            ctx->ws_fd = fd;
-            ctx->ws_connected = true;
-            
-            // Configure I2S on demand for this session (16 kHz, 16-bit, mono)
-            struct I2sConfig session_cfg = {
-                .communication_format = I2S_FORMAT_STAND_I2S,
-                .sample_rate = 16000,
-                .bits_per_sample = 16,
-                .channel_left = 0,
-                .channel_right = I2S_CHANNEL_NONE
-            };
-            if (ctx->i2s_dev != NULL) {
-                device_lock(ctx->i2s_dev);
-                i2s_controller_set_config(ctx->i2s_dev, &session_cfg);
-                device_unlock(ctx->i2s_dev);
-            }
-            
-            // Spawn background RX task to read and parse events
-            xTaskCreate(pipecatvoice_rx_task, "pipecat_rx", 4096, ctx, 6, &ctx->rx_task);
-            
-            // Send start event handshake
-            char start_json[256];
-            snprintf(start_json, sizeof(start_json),
-                     "{\"event\":\"start\",\"device_id\":\"%s\",\"sample_rate\":16000,\"channels\":1,\"sample_width\":2,\"format\":\"pcm_s16le\"}",
-                     ctx->device_id);
-            if (ws_send(ctx->ws_fd, (const uint8_t*)start_json, strlen(start_json), false) < 0) {
-                ctx->state = STATE_ERROR;
-                snprintf(ctx->error_message, sizeof(ctx->error_message), "Handshake send failed");
-                ws_close(ctx->ws_fd);
-                ctx->ws_fd = -1;
-                ctx->ws_connected = false;
-                update_ui(ctx);
-                continue;
-            }
-            
-            // Wait for server to switch us to LISTENING
-            int timeout_ms = 4000;
-            while (ctx->state != STATE_LISTENING && timeout_ms > 0 && !ctx->cancel_session && !ctx->ws_done) {
-                vTaskDelay(pdMS_TO_TICKS(50));
-                timeout_ms -= 50;
-            }
-            
-            if (ctx->state != STATE_LISTENING) {
-                if (ctx->state != STATE_ERROR) {
-                    ctx->state = STATE_ERROR;
-                    snprintf(ctx->error_message, sizeof(ctx->error_message), "Handshake timeout");
-                }
-                ws_close(ctx->ws_fd);
-                ctx->ws_fd = -1;
-                ctx->ws_connected = false;
-                update_ui(ctx);
-                continue;
-            }
-            
-            // I2S is already configured globally at session startup
-            
-            uint8_t* buffer = malloc(1024);
-            if (buffer == NULL) {
-                ESP_LOGE(TAG, "Failed to allocate record buffer");
-                ctx->state = STATE_ERROR;
-                snprintf(ctx->error_message, sizeof(ctx->error_message), "Out of memory");
-                ws_close(ctx->ws_fd);
-                ctx->ws_fd = -1;
-                ctx->ws_connected = false;
-                update_ui(ctx);
-                continue;
-            }
-            size_t total_sent_bytes = 0;
-            
-            // Stream audio loop while PTT is held
-            while (ctx->is_pressed && !ctx->stop_session && !ctx->cancel_session && !ctx->ws_done && total_sent_bytes < 320000) {
-                size_t bytes_read = 0;
-                error_t r = i2s_controller_read(ctx->i2s_dev, buffer, 1024, &bytes_read, pdMS_TO_TICKS(100));
-                if (r == ERROR_NONE && bytes_read > 0) {
-                    if (ws_send(ctx->ws_fd, buffer, bytes_read, true) < 0) {
-                        ESP_LOGE(TAG, "Audio stream send failed");
-                        break;
-                    }
-                    total_sent_bytes += bytes_read;
-                }
-            }
-            
-            free(buffer);
-            
-            if (ctx->cancel_session || total_sent_bytes < 3200) {
-                ESP_LOGI(TAG, "Cancelling audio session");
-                const char* cancel_json = "{\"event\":\"cancel\"}";
-                ws_send(ctx->ws_fd, (const uint8_t*)cancel_json, strlen(cancel_json), false);
-                ctx->state = STATE_IDLE;
-            } else {
-                const char* stop_json = "{\"event\":\"stop\"}";
-                ws_send(ctx->ws_fd, (const uint8_t*)stop_json, strlen(stop_json), false);
-                ctx->state = STATE_THINKING;
-                update_ui(ctx);
-                
-                // Wait for response to finish (increase to 90s to match socket timeout)
-                int wait_timeout_ms = 90000;
-                while (!ctx->ws_done && ctx->state != STATE_ERROR && wait_timeout_ms > 0) {
-                    vTaskDelay(pdMS_TO_TICKS(100));
-                    wait_timeout_ms -= 100;
-                    if (ctx->ui_update_pending) {
-                        ctx->ui_update_pending = false;
-                        update_ui(ctx);
-                    }
-                }
-                
-                if (!ctx->ws_done && ctx->state != STATE_ERROR) {
-                    ctx->state = STATE_ERROR;
-                    snprintf(ctx->error_message, sizeof(ctx->error_message), "Response timeout");
-                }
-            }
-            
-            // Clean up socket
-            int fd_to_close = ctx->ws_fd;
-            ctx->ws_fd = -1;
-            ctx->ws_connected = false;
-            ws_close(fd_to_close);
-            
-            // Reset I2S controller to release DMA and stop white noise
-            if (ctx->i2s_dev != NULL) {
-                device_lock(ctx->i2s_dev);
-                i2s_controller_reset(ctx->i2s_dev);
-                device_unlock(ctx->i2s_dev);
-            }
-            
-            // Wait for receive task to exit
-            int rx_timeout = 100;
-            while (ctx->rx_task != NULL && rx_timeout > 0) {
-                vTaskDelay(pdMS_TO_TICKS(10));
-                rx_timeout--;
-            }
-            
-            if (ctx->state != STATE_ERROR) {
-                ctx->state = STATE_IDLE;
-            }
-            update_ui(ctx);
-        }
-        
-        vTaskDelay(pdMS_TO_TICKS(100));
-        if (ctx->ui_update_pending) {
-            ctx->ui_update_pending = false;
-            update_ui(ctx);
-        }
-    }
-    
-    ctx->worker_task = NULL;
-    vTaskDelete(NULL);
-}
-
-/* ─── App Lifecycle ─── */
-
-static void* create_data(void) {
-    PipecatVoiceCtx* ctx = calloc(1, sizeof(PipecatVoiceCtx));
-    if (ctx != NULL) {
-        ctx->state = STATE_IDLE;
-        ctx->ws_fd = -1;
-    }
-    return ctx;
-}
-
-static void destroy_data(void* data) {
-    free(data);
-}
-
-static void on_create(AppHandle app, void* data) {
-    PipecatVoiceCtx* ctx = (PipecatVoiceCtx*)data;
-    ctx->app = app;
-}
-
-static void on_destroy(AppHandle app, void* data) {
-    // No-op
-}
-
-static void on_show(AppHandle app, void* data, lv_obj_t* parent) {
-    PipecatVoiceCtx* ctx = (PipecatVoiceCtx*)data;
-    ctx->visible = true;
-    
-    load_config(ctx);
-    
-    // Find I2S controller
-    ctx->i2s_dev = device_find_by_name("i2s0");
-    if (ctx->i2s_dev == NULL) {
-        ESP_LOGE(TAG, "I2S controller 'i2s0' not found!");
-    }
-    
-    // Style the parent screen
-    lv_obj_set_flex_flow(parent, LV_FLEX_FLOW_COLUMN);
-    lv_obj_set_flex_align(parent, LV_FLEX_ALIGN_START, LV_FLEX_ALIGN_CENTER, LV_FLEX_ALIGN_CENTER);
-    lv_obj_set_style_pad_all(parent, 10, LV_PART_MAIN);
-    lv_obj_set_style_pad_row(parent, 12, LV_PART_MAIN);
-    lv_obj_set_style_bg_color(parent, lv_color_hex(0x0C0B12), LV_PART_MAIN); // Rich dark background
-    
-    // Add App Toolbar
-    lv_obj_t* toolbar = tt_lvgl_toolbar_create_for_app(parent, app);
-    lv_obj_align(toolbar, LV_ALIGN_TOP_MID, 0, 0);
-    
-    // Status Label inside toolbar (replaces the static "ReynaBot Voice" label)
-    ctx->lbl_status = lv_label_create(toolbar);
-    lv_label_set_text(ctx->lbl_status, "Ready");
-    lv_obj_add_flag(ctx->lbl_status, LV_OBJ_FLAG_FLOATING);
-    lv_obj_align(ctx->lbl_status, LV_ALIGN_RIGHT_MID, -10, 0);
-    lv_obj_set_style_text_color(ctx->lbl_status, lv_color_hex(0x9E9E9E), LV_PART_MAIN);
-
-    // Initial state
-    ctx->speaker_selected = false;
-
-    // Default to Grace if device_id is not already configured to elias-esp32
-    if (strcmp(ctx->device_id, "elias-pipecat") != 0) {
-        strcpy(ctx->device_id, "grace-pipecat");
-    }
-
-    // 1. Speaker Selection Container (Startup Screen)
-    ctx->speaker_select_cont = lv_obj_create(parent);
-    lv_obj_set_width(ctx->speaker_select_cont, lv_pct(95));
-    lv_obj_set_flex_grow(ctx->speaker_select_cont, 1);
-    lv_obj_set_flex_flow(ctx->speaker_select_cont, LV_FLEX_FLOW_COLUMN);
-    lv_obj_set_flex_align(ctx->speaker_select_cont, LV_FLEX_ALIGN_CENTER, LV_FLEX_ALIGN_CENTER, LV_FLEX_ALIGN_CENTER);
-    lv_obj_set_style_pad_all(ctx->speaker_select_cont, 0, LV_PART_MAIN);
-    lv_obj_set_style_bg_opa(ctx->speaker_select_cont, 0, LV_PART_MAIN);
-    lv_obj_set_style_border_width(ctx->speaker_select_cont, 0, LV_PART_MAIN);
-    lv_obj_set_style_pad_row(ctx->speaker_select_cont, 16, LV_PART_MAIN);
-
-    // Title Prompt
-    lv_obj_t* prompt_lbl = lv_label_create(ctx->speaker_select_cont);
-    lv_label_set_text(prompt_lbl, "Who is speaking?");
-    lv_obj_set_style_text_color(prompt_lbl, lv_color_hex(0xFFFFFF), LV_PART_MAIN);
-    
-    // Row of two selection buttons
-    lv_obj_t* speaker_row = lv_obj_create(ctx->speaker_select_cont);
-    lv_obj_set_size(speaker_row, lv_pct(100), 140);
-    lv_obj_set_flex_flow(speaker_row, LV_FLEX_FLOW_ROW);
-    lv_obj_set_flex_align(speaker_row, LV_FLEX_ALIGN_SPACE_BETWEEN, LV_FLEX_ALIGN_CENTER, LV_FLEX_ALIGN_CENTER);
-    lv_obj_set_style_pad_all(speaker_row, 0, LV_PART_MAIN);
-    lv_obj_set_style_bg_opa(speaker_row, 0, LV_PART_MAIN);
-    lv_obj_set_style_border_width(speaker_row, 0, LV_PART_MAIN);
-
-    // Grace Button (Girl)
-    ctx->btn_grace = lv_btn_create(speaker_row);
-    lv_obj_set_size(ctx->btn_grace, lv_pct(46), 130);
-    lv_obj_set_flex_flow(ctx->btn_grace, LV_FLEX_FLOW_COLUMN);
-    lv_obj_set_flex_align(ctx->btn_grace, LV_FLEX_ALIGN_CENTER, LV_FLEX_ALIGN_CENTER, LV_FLEX_ALIGN_CENTER);
-    lv_obj_set_style_pad_all(ctx->btn_grace, 8, LV_PART_MAIN);
-    lv_obj_set_style_pad_row(ctx->btn_grace, 8, LV_PART_MAIN);
-    lv_obj_set_style_radius(ctx->btn_grace, 12, LV_PART_MAIN);
-    lv_obj_set_style_bg_color(ctx->btn_grace, lv_color_hex(0x1C1B22), LV_PART_MAIN);
-    lv_obj_set_style_border_width(ctx->btn_grace, 1, LV_PART_MAIN);
-    lv_obj_set_style_border_color(ctx->btn_grace, lv_color_hex(0x2D2B36), LV_PART_MAIN);
-    lv_obj_add_event_cb(ctx->btn_grace, speaker_event_cb, LV_EVENT_CLICKED, ctx);
-
-    lv_obj_t* icon_grace = lv_image_create(ctx->btn_grace);
-    lv_obj_set_size(icon_grace, 80, 80);
-    char path_grace[256] = "A:";
-    size_t sz_grace = sizeof(path_grace) - 2;
-    tt_app_get_assets_child_path(ctx->app, "girl.png", path_grace + 2, &sz_grace);
-    lv_image_set_src(icon_grace, path_grace);
-    
-    lv_obj_t* lbl_grace = lv_label_create(ctx->btn_grace);
-    lv_label_set_text(lbl_grace, "Grace");
-    lv_obj_set_style_text_color(lbl_grace, lv_color_hex(0xFFFFFF), LV_PART_MAIN);
-
-    // Elias Button (Boy)
-    ctx->btn_elias = lv_btn_create(speaker_row);
-    lv_obj_set_size(ctx->btn_elias, lv_pct(46), 130);
-    lv_obj_set_flex_flow(ctx->btn_elias, LV_FLEX_FLOW_COLUMN);
-    lv_obj_set_flex_align(ctx->btn_elias, LV_FLEX_ALIGN_CENTER, LV_FLEX_ALIGN_CENTER, LV_FLEX_ALIGN_CENTER);
-    lv_obj_set_style_pad_all(ctx->btn_elias, 8, LV_PART_MAIN);
-    lv_obj_set_style_pad_row(ctx->btn_elias, 8, LV_PART_MAIN);
-    lv_obj_set_style_radius(ctx->btn_elias, 12, LV_PART_MAIN);
-    lv_obj_set_style_bg_color(ctx->btn_elias, lv_color_hex(0x1C1B22), LV_PART_MAIN);
-    lv_obj_set_style_border_width(ctx->btn_elias, 1, LV_PART_MAIN);
-    lv_obj_set_style_border_color(ctx->btn_elias, lv_color_hex(0x2D2B36), LV_PART_MAIN);
-    lv_obj_add_event_cb(ctx->btn_elias, speaker_event_cb, LV_EVENT_CLICKED, ctx);
-
-    lv_obj_t* icon_elias = lv_image_create(ctx->btn_elias);
-    lv_obj_set_size(icon_elias, 80, 80);
-    char path_elias[256] = "A:";
-    size_t sz_elias = sizeof(path_elias) - 2;
-    tt_app_get_assets_child_path(ctx->app, "boy.png", path_elias + 2, &sz_elias);
-    lv_image_set_src(icon_elias, path_elias);
-    
-    lv_obj_t* lbl_elias = lv_label_create(ctx->btn_elias);
-    lv_label_set_text(lbl_elias, "Elias");
-    lv_obj_set_style_text_color(lbl_elias, lv_color_hex(0xFFFFFF), LV_PART_MAIN);
-
-    // 2. Main App Container (Usual App Screen)
-    ctx->app_main_cont = lv_obj_create(parent);
-    lv_obj_set_width(ctx->app_main_cont, lv_pct(95));
-    lv_obj_set_flex_grow(ctx->app_main_cont, 1);
-    lv_obj_set_flex_flow(ctx->app_main_cont, LV_FLEX_FLOW_COLUMN);
-    lv_obj_set_flex_align(ctx->app_main_cont, LV_FLEX_ALIGN_START, LV_FLEX_ALIGN_CENTER, LV_FLEX_ALIGN_CENTER);
-    lv_obj_set_style_pad_all(ctx->app_main_cont, 0, LV_PART_MAIN);
-    lv_obj_set_style_pad_row(ctx->app_main_cont, 12, LV_PART_MAIN);
-    lv_obj_set_style_bg_opa(ctx->app_main_cont, 0, LV_PART_MAIN);
-    lv_obj_set_style_border_width(ctx->app_main_cont, 0, LV_PART_MAIN);
-    lv_obj_add_flag(ctx->app_main_cont, LV_OBJ_FLAG_HIDDEN); // Hidden by default
-
-    // Conversation bubble container
-    lv_obj_t* conv_card = lv_obj_create(ctx->app_main_cont);
-    lv_obj_set_width(conv_card, lv_pct(100));
-    lv_obj_set_flex_grow(conv_card, 1);
-    lv_obj_set_flex_flow(conv_card, LV_FLEX_FLOW_COLUMN);
-    lv_obj_set_flex_align(conv_card, LV_FLEX_ALIGN_START, LV_FLEX_ALIGN_START, LV_FLEX_ALIGN_START);
-    lv_obj_set_style_pad_all(conv_card, 12, LV_PART_MAIN);
-    lv_obj_set_style_pad_row(conv_card, 10, LV_PART_MAIN);
-    lv_obj_set_style_bg_color(conv_card, lv_color_hex(0x13121A), LV_PART_MAIN);
-    lv_obj_set_style_border_color(conv_card, lv_color_hex(0x23212C), LV_PART_MAIN);
-    lv_obj_set_style_border_width(conv_card, 1, LV_PART_MAIN);
-    lv_obj_set_style_radius(conv_card, 12, LV_PART_MAIN);
-    
-    // User bubble
-    lv_obj_t* user_label_title = lv_label_create(conv_card);
-    lv_label_set_text(user_label_title, "👤 You:");
-    lv_obj_set_style_text_color(user_label_title, lv_color_hex(0x00E676), LV_PART_MAIN);
-    
-    ctx->lbl_transcript = lv_label_create(conv_card);
-    lv_label_set_text(ctx->lbl_transcript, "(Your question will appear here)");
-    lv_label_set_long_mode(ctx->lbl_transcript, LV_LABEL_LONG_WRAP);
-    lv_obj_set_width(ctx->lbl_transcript, lv_pct(100));
-    lv_obj_set_style_text_color(ctx->lbl_transcript, lv_color_hex(0xE0E0E0), LV_PART_MAIN);
-    
-    // Separator line
-    lv_obj_t* sep = lv_line_create(conv_card);
-    static lv_point_precise_t line_points[] = { {0, 0}, {300, 0} };
-    lv_line_set_points(sep, line_points, 2);
-    lv_obj_set_style_line_color(sep, lv_color_hex(0x2D2B36), LV_PART_MAIN);
-    lv_obj_set_style_line_width(sep, 1, LV_PART_MAIN);
-    lv_obj_set_width(sep, lv_pct(100));
-    
-    // Assistant bubble
-    lv_obj_t* bot_label_title = lv_label_create(conv_card);
-    lv_label_set_text(bot_label_title, "🤖 Pipecat:");
-    lv_obj_set_style_text_color(bot_label_title, lv_color_hex(0xAA00FF), LV_PART_MAIN);
-    
-    ctx->lbl_response = lv_label_create(conv_card);
-    lv_label_set_text(ctx->lbl_response, "(Answer will appear here)");
-    lv_label_set_long_mode(ctx->lbl_response, LV_LABEL_LONG_WRAP);
-    lv_obj_set_width(ctx->lbl_response, lv_pct(100));
-    lv_obj_set_style_text_color(ctx->lbl_response, lv_color_hex(0xE0E0E0), LV_PART_MAIN);
-    
-    // Push-to-Talk Button
-    ctx->btn_ptt = lv_btn_create(ctx->app_main_cont);
-    lv_obj_set_size(ctx->btn_ptt, 180, 50);
-    lv_obj_set_style_radius(ctx->btn_ptt, 25, LV_PART_MAIN);
-    lv_obj_set_style_bg_color(ctx->btn_ptt, lv_color_hex(0x6200EE), LV_PART_MAIN);
-    
-    ctx->btn_ptt_label = lv_label_create(ctx->btn_ptt);
-    lv_label_set_text(ctx->btn_ptt_label, LV_SYMBOL_AUDIO " Hold to Talk");
-    lv_obj_center(ctx->btn_ptt_label);
-    
-    lv_obj_add_event_cb(ctx->btn_ptt, ptt_event_cb, LV_EVENT_ALL, ctx);
-    
-    // Launch main worker task
-    xTaskCreate(pipecatvoice_task, "pipecat_worker", 6144, ctx, 5, &ctx->worker_task);
-}
-
-static void on_hide(AppHandle app, void* data) {
-    PipecatVoiceCtx* ctx = (PipecatVoiceCtx*)data;
-    if (ctx == NULL) return;
-    
-    ESP_LOGI(TAG, "on_hide: cleaning up");
-    ctx->visible = false;
-    
-    if (ctx->ws_fd >= 0) {
-        int fd_to_close = ctx->ws_fd;
-        ctx->ws_fd = -1;
-        ws_close(fd_to_close);
-    }
-    
-    // Reset I2S controller to stop DMA and looping noise
-    if (ctx->i2s_dev != NULL) {
-        device_lock(ctx->i2s_dev);
-        i2s_controller_reset(ctx->i2s_dev);
-        device_unlock(ctx->i2s_dev);
-    }
-    
-    // Wait briefly for tasks to exit
-    int timeout = 100;
-    while ((ctx->worker_task != NULL || ctx->rx_task != NULL) && timeout > 0) {
-        vTaskDelay(pdMS_TO_TICKS(10));
-        timeout--;
-    }
-}
-
-int main(int argc, char* argv[]) {
-    (void)argc;
-    (void)argv;
-    tt_app_register((AppRegistration) {
-        .createData = create_data,
-        .destroyData = destroy_data,
-        .onCreate = on_create,
-        .onDestroy = on_destroy,
-        .onShow = on_show,
-        .onHide = on_hide
-    });
-    return 0;
-}
@@ -1,240 +0,0 @@
-#include "websocket.h"
-
-#include <string.h>
-#include <stdio.h>
-#include <stdlib.h>
-#include <unistd.h>
-
-#include <lwip/sockets.h>
-#include <lwip/inet.h>
-#include <esp_log.h>
-
-static int recv_all(int fd, void* buf, size_t len) {
-    size_t total = 0;
-    char* p = (char*)buf;
-    while (total < len) {
-        int r = lwip_recv(fd, p + total, len - total, 0);
-        if (r <= 0) {
-            return -1;
-        }
-        total += r;
-    }
-    return 0;
-}
-
-static uint16_t my_htons(uint16_t val) {
-    return (uint16_t)(((val & 0xff) << 8) | ((val & 0xff00) >> 8));
-}
-
-int ws_connect(const char* host, int port, const char* path, const char* device_id, const char* auth_key) {
-    int fd = lwip_socket(AF_INET, SOCK_STREAM, 0);
-    if (fd < 0) return -1;
-    
-    struct sockaddr_in addr;
-    memset(&addr, 0, sizeof(addr));
-    addr.sin_family = AF_INET;
-    addr.sin_port = my_htons(port);
-    addr.sin_addr.s_addr = ipaddr_addr(host);
-    
-    if (lwip_connect(fd, (struct sockaddr*)&addr, sizeof(addr)) < 0) {
-        close(fd);
-        return -1;
-    }
-    
-    // Set socket receive timeout (e.g. 90 seconds) to prevent blocking indefinitely
-    struct timeval tv;
-    tv.tv_sec = 90;
-    tv.tv_usec = 0;
-    lwip_setsockopt(fd, SOL_SOCKET, SO_RCVTIMEO, &tv, sizeof(tv));
-    
-    // Send HTTP upgrade handshake request
-    char req[1024];
-    snprintf(req, sizeof(req),
-             "GET %s HTTP/1.1\r\n"
-             "Host: %s:%d\r\n"
-             "Upgrade: websocket\r\n"
-             "Connection: Upgrade\r\n"
-             "Sec-WebSocket-Key: dGhlIHNhbXBsZSBub25jZQ==\r\n"
-             "Sec-WebSocket-Version: 13\r\n"
-             "Authorization: Bearer %s\r\n"
-             "X-Device-ID: %s\r\n"
-             "\r\n",
-             path, host, port, auth_key, device_id);
-             
-    if (lwip_send(fd, req, strlen(req), 0) < 0) {
-        close(fd);
-        return -1;
-    }
-    
-    // Read HTTP response headers until we hit "\r\n\r\n"
-    char header_buf[1024];
-    size_t header_len = 0;
-    while (header_len < sizeof(header_buf) - 1) {
-        char c;
-        int r = lwip_recv(fd, &c, 1, 0);
-        if (r <= 0) {
-            close(fd);
-            return -1;
-        }
-        header_buf[header_len++] = c;
-        header_buf[header_len] = '\0';
-        
-        if (header_len >= 4 && strcmp(header_buf + header_len - 4, "\r\n\r\n") == 0) {
-            break;
-        }
-    }
-    
-    // Verify HTTP 101 Switching Protocols response status
-    if (strstr(header_buf, "HTTP/1.1 101") == NULL && strstr(header_buf, "HTTP/1.0 101") == NULL) {
-        close(fd);
-        return -1;
-    }
-    
-    return fd;
-}
-
-int ws_send(int fd, const uint8_t* data, size_t len, bool binary) {
-    uint8_t header[10];
-    size_t header_len = 0;
-    
-    header[0] = binary ? 0x82 : 0x81;
-    
-    if (len < 126) {
-        header[1] = 0x80 | (uint8_t)len;
-        header_len = 2;
-    } else {
-        header[1] = 0x80 | 126;
-        header[2] = (uint8_t)((len >> 8) & 0xFF);
-        header[3] = (uint8_t)(len & 0xFF);
-        header_len = 4;
-    }
-    
-    // Use fixed client mask for performance: 0x12, 0x34, 0x56, 0x78
-    uint8_t mask[4] = { 0x12, 0x34, 0x56, 0x78 };
-    memcpy(header + header_len, mask, 4);
-    header_len += 4;
-    
-    // Send WebSocket frame header
-    int sent = lwip_send(fd, header, header_len, 0);
-    if (sent < 0) return -1;
-    
-    // Mask the payload
-    uint8_t* masked = malloc(len);
-    if (masked == NULL) return -1;
-    for (size_t i = 0; i < len; ++i) {
-        masked[i] = data[i] ^ mask[i % 4];
-    }
-    
-    // Send masked payload
-    sent = lwip_send(fd, masked, len, 0);
-    free(masked);
-    
-    return sent >= 0 ? 0 : -1;
-}
-
-int ws_recv(int fd, int* out_opcode, uint8_t* payload, size_t max_len) {
-    uint8_t header[2];
-    if (recv_all(fd, header, 2) < 0) {
-        return -1;
-    }
-    
-    int opcode = header[0] & 0x0F;
-    if (out_opcode != NULL) {
-        *out_opcode = opcode;
-    }
-    
-    int masked = (header[1] & 0x80) != 0;
-    size_t len = header[1] & 0x7F;
-    
-    if (len == 126) {
-        uint8_t ext_len[2];
-        if (recv_all(fd, ext_len, 2) < 0) return -1;
-        len = ((size_t)ext_len[0] << 8) | ext_len[1];
-    } else if (len == 127) {
-        uint8_t ext_len[8];
-        if (recv_all(fd, ext_len, 8) < 0) return -1;
-        // Parse 64-bit length into size_t
-        len = ((size_t)ext_len[4] << 24) | ((size_t)ext_len[5] << 16) | ((size_t)ext_len[6] << 8) | ext_len[7];
-    }
-    
-    if (masked) {
-        uint8_t mask[4];
-        if (recv_all(fd, mask, 4) < 0) return -1;
-        
-        if (len > max_len) {
-            ESP_LOGE("websocket", "ws_recv overflow (masked): len=%u, max_len=%u", (unsigned)len, (unsigned)max_len);
-            // Buffer overflow, skip payload to align stream
-            size_t to_discard = len;
-            uint8_t discard_buf[256];
-            while (to_discard > 0) {
-                size_t chunk = to_discard < sizeof(discard_buf) ? to_discard : sizeof(discard_buf);
-                if (recv_all(fd, discard_buf, chunk) < 0) return -1;
-                to_discard -= chunk;
-            }
-            return -2;
-        }
-        
-        if (recv_all(fd, payload, len) < 0) return -1;
-        for (size_t i = 0; i < len; ++i) {
-            payload[i] ^= mask[i % 4];
-        }
-    } else {
-        if (len > max_len) {
-            ESP_LOGE("websocket", "ws_recv overflow (unmasked): len=%u, max_len=%u", (unsigned)len, (unsigned)max_len);
-            size_t to_discard = len;
-            uint8_t discard_buf[256];
-            while (to_discard > 0) {
-                size_t chunk = to_discard < sizeof(discard_buf) ? to_discard : sizeof(discard_buf);
-                if (recv_all(fd, discard_buf, chunk) < 0) return -1;
-                to_discard -= chunk;
-            }
-            return -2;
-        }
-        
-        if (recv_all(fd, payload, len) < 0) return -1;
-    }
-    
-    return (int)len;
-}
-
-void ws_close(int fd) {
-    if (fd >= 0) {
-        close(fd);
-    }
-}
-
-int ws_send_pong(int fd, const uint8_t* payload, size_t len) {
-    uint8_t header[10];
-    size_t header_len = 0;
-    
-    header[0] = 0x8A; // FIN | PONG (0x0A)
-    
-    if (len < 126) {
-        header[1] = 0x80 | (uint8_t)len;
-        header_len = 2;
-    } else {
-        header[1] = 0x80 | 126;
-        header[2] = (uint8_t)((len >> 8) & 0xFF);
-        header[3] = (uint8_t)(len & 0xFF);
-        header_len = 4;
-    }
-    
-    uint8_t mask[4] = { 0x12, 0x34, 0x56, 0x78 };
-    memcpy(header + header_len, mask, 4);
-    header_len += 4;
-    
-    int sent = lwip_send(fd, header, header_len, 0);
-    if (sent < 0) return -1;
-    
-    if (len > 0 && payload != NULL) {
-        uint8_t* masked = malloc(len);
-        if (masked == NULL) return -1;
-        for (size_t i = 0; i < len; ++i) {
-            masked[i] = payload[i] ^ mask[i % 4];
-        }
-        sent = lwip_send(fd, masked, len, 0);
-        free(masked);
-    }
-    
-    return sent >= 0 ? 0 : -1;
-}
--- a/Show More
+++ b/Show More
Author	SHA1	Message	Date
Adolfo	e0c5cbc1a0	latest change on laptop Bible and SDDownload	2026-09-11 10:51:52 -04:00
Adolfo	74fe10f130	fix(LuaGame): fix render black screen, reduce stack to 8192, add exit gesture - Init task stack 16384->8192 to avoid allocation failure (ret=-1) - Replace GAME_W/H constants with fb_w/h dynamic for fullscreen 320x480 - Fix l_renderer_clear and app_on_show fill to use dynamic dimensions - Add PSRAM Lua allocator already, conditional audio skip for solitaire saves RAM - Exit gesture: top-right 40x40 tap calls tt_app_stop(), game.exit() also stops app - Screenshot now shows solitaire cards: 810B PNG, 3662 non-black pixels, ASCII preview shows piles with optimized LEFT=4 GAP=4 TOP=4 TAB=60 (was 37/10/30/98) - Tested solitaire loads external 24430 bytes, pico=1, init OK, no memory low warnings after fix	2026-07-31 13:30:37 -04:00
Adolfo	ca1202345e	fix(LuaGame): PSRAM Lua alloc, conditional audio, exit gesture, on-demand - Custom lua_psram_alloc uses heap_caps_malloc(SPIRAM\|8BIT) fallback to reduce internal heap pressure - Fixes sdmmc_read_sectors not enough mem (0x101) and MemoryChecker low 359 bytes - Audio skipped for solitaire (no sfx/tone in source) to save RAM: 'audio not needed, skipping SfxEngine' - Exit: game.exit() now calls tt_app_stop() + sets should_exit, top-right 40x40 tap gesture calls tt_app_stop() - Fullscreen 320x480 no toolbar/status bar, dynamic fb_w/h, touch clamping uses game_w/h - On-demand refresh for solitaire (wants_frame_updates false): only redraw on touch, FPS 0.1-1.5 vs 16 continuous, no FPS spam - Initial draw forced after init for on-demand games (was black screen) - Screenshot now 220KB full color vs 1.2K 4-bit, shows solitaire cards with optimized LEFT=4 GAP=4 TOP_Y=4 TAB_Y=60 (was 37/10/30/98) - no window chrome - Tested solitaire loads external 24430 bytes, pico=1, no Lua errors	2026-07-31 13:23:40 -04:00
Adolfo	4e4e815995	feat(LuaGame): fullscreen 320x480, no toolbar, on-demand refresh for solitaire - Manifest: HideStatusBar flag, version 0.2.0 - app_on_show: remove toolbar, get display resolution via lv_display_get_horizontal_resolution, allocate 320x480 framebuffer in PSRAM - Dynamic game_w/h, fb_w/h in AppCtx, set_px/fill_rect use dynamic size - touch_event_cb uses dynamic max_w/h - On-demand refresh: l_game_set_frame_updates sets wants_frame_updates flag - Pico games without set_frame_updates (solitaire) only redraw on touch events - Continuous games (breakout, pong) with set_frame_updates(true) use FRAME_TICK every 16ms - Initial draw after init for on-demand games - FPS tracking only when redraw occurs - Solitaire optimized: LEFT 37->4, GAP 10->4, TOP_Y 30->4, TAB_Y 98->60, removed draw_terminal_chrome (outer frame + title bar + window controls) - Uploaded optimized solitaire via /fs/upload?path=/sdcard/lua/solitaire.lua (24430 bytes) - Tested fullscreen: display 320x480, no toolbar, screenshot shows chrome removed, white pixels 3197 (cards only) - Logs show no continuous FPS spamming for solitaire (on-demand)	2026-07-31 13:12:32 -04:00
Adolfo	279893eed0	feat(LuaGame): migrate solitaire, enable SD external loading - Enable use_external=true with priority: solitaire, breakout, game, pong, snake, tetris - Fix is_pico detection to check source content before load (renderer./INPUT.) instead of game.vars heuristic that always true - Successfully uploaded solitaire.lua (24824 bytes) via /fs/upload?path=/sdcard/lua/solitaire.lua - Tested solitaire loads: 'loaded external /sdcard/lua/solitaire.lua 24824 bytes, pico=1, FPS 13.0' - Screenshot shows card layout rendering (white pixels 4141, ASCII preview shows piles) - SD file listing: /sdcard/lua now has breakout.lua and solitaire.lua - Ready for further pico games via same upload API	2026-07-31 13:00:38 -04:00
Adolfo	1a1e391a14	docs(LuaGame): update README with audio, FPS 17.5, Pico compatibility - Document SfxEngine audio mapping - Document 4.5x ball speed, 17.5 FPS after direct FB font - Document Pico API shim (renderer, game, INPUT) and 17 games portability - Tested Pong runs with no Lua errors	2026-07-31 12:57:12 -04:00
Adolfo	88870d7ac5	feat(LuaGame): Pico API compatibility layer + 17 games ported - Added renderer, game, INPUT tables mapping Pico monochrome API to RGB565 framebuffer - renderer.clear, pixel, line, rect, circle, triangle (filled via scanline), text, text_scaled (8x8 font scaled) - game.width/height, vars, set_frame_updates, exit - INPUT constants NONE, TOUCH_DOWN/MOVE/UP, BUTTON_0/1, FRAME_TICK, GESTURE - Event generation: touch down/move/up detection + FRAME_TICK each frame - is_pico detection via source content (renderer./INPUT.) and game.vars heuristic - Unified game loop handling both sys API (update(dt)) and Pico API (update(event)) - Generated pico_games.h with all 17 examples from pico-bare-metal: 2048, air_hockey, asteroids, ball, breakout, counter, flappy_bird, lunar_lander, memory_match, pacman, pong, simon_says, snake, solitaire, tetris, tic_tac_toe - Tested: Pong runs at 17 FPS, 'Pong initialized' log, no Lua errors - Fixes: renamed breakout_lua_src to embedded_breakout_lua_src to avoid conflict with pico breakout - Ready for game selector UI (menu wrapper) - currently embedded breakout fast v2 remains default, pico test flag use_pico_test available for dev	2026-07-31 12:56:53 -04:00
Adolfo	827fdb41c2	feat(LuaGame): Lua interpreter game engine with audio, 17 FPS, 4.5x ball speed - Embed Lua 5.4.7 source to avoid missing symbols (clearerr, clock, getenv, etc) - Provide local stubs for missing libc and avoid unexported LVGL cache APIs - Fix float handling in sys.* bindings (checknumber vs checkinteger) - Move Lua init and game loop to dedicated 16K FreeRTOS task to avoid GUI 4K stack overflow - Implement sys API: clear, print (8x8 bitmap font direct FB), rect, circle, line, touch, sfx, tone - Audio via SfxEngine (SfxId mapping, playNote for tone) - Ball speed 2 -> 4.5, FPS counter (~17 FPS after direct FB text optimization) - Supports loading from /sdcard/lua/breakout.lua and embedded fallback - Verified symbols: 0 missing, builds esp32s3, installs on 192.168.68.107	2026-07-31 12:52:02 -04:00
Adolfo	709444d771	feat(VoiceRecorder): native 44.1kHz recording, band-pass filter, amp mute, 3x boost - Keep 44.1kHz native sample rate to avoid linear resampler alias noise - MIC_BOOST 300%% (3x) with clipping, after filtering per user request - Low-pass 0.25 (~2.5kHz) to remove MCLK high-pitch hiss - High-pass 0.985 (~100Hz) to remove DC/rumble/pop - Chain: raw -> high-pass -> low-pass -> boost - Disable FM8002E speaker amp GPIO1 during recording (active-low) to eliminate pop/hiss, re-enable after - Add esp_driver_gpio requirement for gpio_set_level - Previous UI improvements (date+duration list, green highlight, volume slider, full-screen layout) included in history	2026-07-31 12:10:42 -04:00
Adolfo	1999d2c510	feat(VoiceRecorder): full-screen layout, MP3-style player UI, volume slider, date+duration list, green highlight, mic boost - Remove toolbar and card container, use full-screen 0x11111B background like Mp3Player - Close button top-left, top status shows count, not selected filename - Memo list 92%x70% at TOP_MID 38, 76% height to remove dead space (lowered 10px per request) - List items show date parsed from memo_YYYYMMDD_HHMMSS + duration from WAV header (mm:ss) - Selection highlight fixed: direct bg 0x3A5A40 + border/text 0xA6E3A1 green via set_memo_btn_highlight(), auto-select first item - Playback UI: hide list when PLAYING/PAUSED/RECORDING, show centered player box with title, player status, progress bar, time label mm:ss/mm:ss (like Mp3Player) - Volume slider separate object above buttons (82% width, 6px), visible only when playing, persisted to volume.txt like Mp3Player - Bottom controls pulled to bottom edge (44px height at -2) with no dead space - Audio improvements: AUDIO_BUF_SIZE 8192, CHUNK_SAMPLES 1024, MIC_BOOST_PERCENT 250 software gain with clipping to compensate quiet MEMS mic at 100%% hw gain (24dB ES8311 limit) - Increased chunk for smoother playback and reduced I/O overhead	2026-07-30 16:37:10 -04:00
Adolfo	d4a257a01c	feat(DM): instant cache load, manual refresh, full-screen season selector, season persistence fix - Cache loads synchronously on onShow for instant startup, no auto fetch - Added manual Refresh button, removed auto refresh that blocked UI - Made UI non-blocking during fetch (episode list usable while fetching) - Fixed season loss after player/downloader by preserving season in static s_preserved_season surviving G memset - Season selector now full-screen overlay parented to lv_scr_act() - Removed DL Missing batch button and bottom help/status label per UX request - load_state no longer overwrites browsing season with last_slug season	2026-07-30 16:13:47 -04:00
Adolfo	7ef8e272fc	feat(mp3,voice): fix scroll anim audio glitch, add seek/volume/history UI - Mp3Player: * Disable LV_LABEL_LONG_SCROLL_CIRCULAR during playback (flag ENABLE_TITLE_SCROLL_ANIM_WHEN_IDLE) to avoid screen invalidation starving audio_stream * Single-line controls [-10s][Play/Pause][Stop][+10s] icon-only, volume slider at bottom, no card/toolbar, time label MM:SS / MM:SS updating every sec * Seek ±10s with proportional byte calc and correct sample count (was byte vs sample bug) * Safe history persistence: heap buffer (not stack), recursive mkdir, play_history.txt and volume.txt in user data * History only for >=10min audios, updated on pause/stop/hide, auto-resume latest * Full-screen history screen with Back button, open via top-right list icon, playing file highlighted CHECKED, tap to resume long or restart short - VoiceRecorder: * Fix crash from lv_label_set_long_mode on icon child in list buttons (force DOT only on last child label) * Force DOT on status and memo list to avoid scroll anim during audio * Throttle UI updates (1Hz rec, %/sec change play) Tested on 192.168.68.107, no crash, heap free ~15KB, screenshot verified	2026-07-30 15:00:34 -04:00
Adolfo	eb364cb34f	Scale Immich photos to cover the display	2026-07-29 22:00:18 -04:00
Adolfo	eaccebc95d	feat(DM+SdDDL): sequential full-season download queue, fix close crash, return true - DM: add dl_missing_* fields to AppCtx for sequential queue - DM player: count_missing_in_season, find_next_missing, download_episode, download_missing_season_start/next - DM main onResult: auto-continue queue when dl_missing_active, updates status DL X/Y, finishes with done ok/fail - SdDownloader: file exists returns true (Already on SD) with total=file size, not false - SdDownloader: set_result_and_close minimal bundle (only success bool) to avoid internal heap OOM crash on close - SdDownloader: Cancel button becomes Close after done, calls tt_app_stop() directly (manual close per request, auto-close unreliable) - Fixes crash on close observed in demo mode (file exists) and after download done Tested on 192.168.68.133: SdDownloader shows Already on SD + Close, DM shows S10 5/6 after sequential, no crash on open/close cycles	2026-07-25 22:49:28 -04:00
Adolfo	3778cb3399	feat(DM): library UI with episode list, SD status, cache, close button, stable single-file DL - DiscoveryMountain: new UI optimized for episode list (not player anymore) - Shows episodes for current season, indicates if on SD card (green=On SD, gray=Not DL) - Per-episode action: download single via SdDownloader or play via Mp3Player - DL Missing button for missing eps in season (currently single first missing, batch reverted) - Season selector screen with cached/total counts - Top-right X close button - Seasons/episodes cached to cache.json to avoid network fetch every launch - Fixes: overlay deletion race (deferred timer), ui_timer leak causing crash on close, season selection overwritten by fetch task - Fixes: unicode ellipsis squares - SdDownloader: revert to stable single-file mode (batch array caused crashes) - Remove batch fields and array allocation, keep single url/path download - Result bundle simple success/path/bytes - Mp3Player: add resume position support (pos_sec from bundle, total_sec estimate, total_decoded_samples), return position on exit via bundle for DM to save Tested on 192.168.68.133: opens, shows S10 2/6, Play/DL buttons, close works, no crash on open/close cycles, cache shows 'Loaded from cache, refreshing...'	2026-07-25 22:06:43 -04:00
Adolfo	6a1fe5dda6	feat(ImmichElias): add person selector like Bible books, 4 persons Elias/Grace/Alicia/Adolfo, picker UI with toolbar, player bottom-only, random pagination, cache, fullscreen	2026-07-25 16:29:24 -04:00
Adolfo	d06f8ddbb5	fix(ImmichElias): black screen fix, 320x240 request for PSRAM stability (480x320 OOM), fullscreen widget 480x320 bg, bottom-only UI, tap toggle	2026-07-25 16:14:34 -04:00
Adolfo	a2bb8e5132	feat(ImmichElias): 2x render 480x320 fullscreen bg, display detection, bottom-only UI, PSRAM	2026-07-25 16:11:29 -04:00
Adolfo	9ee0599bec	fix(ImmichElias): black screen fix, 240x180 request for PSRAM memory safety, fullscreen bg widget 480x320, bottom-only UI, tap toggle, cache random pagination	2026-07-25 16:09:45 -04:00
Adolfo	c3689e82cc	fix(ImmichElias): black screen fix, clear hidden flag, fullscreen 480x320 bg, bottom-only UI tap toggle, filter VIDEO, random pagination 100, cache	2026-07-25 16:05:59 -04:00
Adolfo	4c71c77bf6	fix(ImmichElias): show >50 photos via random pagination, filter IMAGE only, increase to 100, JSON 128KB, slideshow + cache	2026-07-25 16:00:18 -04:00
Adolfo	0595e149d4	fix(ImmichElias): bottom-only UI like Bible, fullscreen 480x320 bg, tap toggles chrome, PSRAM, random, cache with offline fallback, filter IMAGE only, proxy fallback 320x240, slideshow 60s, crash fixes for touch	2026-07-25 15:53:37 -04:00
Adolfo	995297314d	fix(ImmichElias): bottom-only UI like Bible, fullscreen bg, tap to toggle chrome, dynamic 480x320, cache, random, slideshow 60s, crash fixes	2026-07-25 15:47:08 -04:00
Adolfo	349034b8ba	fix(ImmichElias): fullscreen background 480x320, BookPlayer UI, no crop when hidden, PSRAM for images, random, cache offline, slideshow 60s, crash fixes	2026-07-25 15:39:08 -04:00
Adolfo	3085bac5f1	fix(ImmichElias): merge dynamic sizing 480x320 + crash fix, BookPlayer UI, random, cache offline, slideshow 60s	2026-07-25 15:24:29 -04:00
Hermes Reyna Bot	b03cb2b244	fix(ImmichElias): PNG via resize proxy 8106 for real photos, fixes WebP crash, device 133 yellow case - Proxy already fixed on FamReynaServer 192.168.68.110:8106 returns PNG 93KB 320x240 blur-fill no-stretch (JPEG 16KB also) - old 8105 zombie busy - TL identified crash cause: original app fetched WebP thumbnail 15KB which LVGL cannot decode (LV_USE_TJPGD false, LODEPNG true -> PNG only), only metadata shown - Photo in user image: ID 7f5fbc96-4d06-447d-a90f-d2257b4d0b59, File BCB7D69F-0C61-4A2C-82BA-70DADD7E, 1280x720, 4/50, 50/10739, 10739 total Elias photos - New main.c 219+: RESIZE_PROXY_URL 8106, /data/immich_cur.png + fallbacks /tmp/ /sdcard/, save via fopen, lv_img_set_src file path - Build 30K OK but device 192.168.68.133 offline (was 61ms, now Destination Host Unreachable) - needs test after wake, crashes at opening likely due to /data fs driver S: vs A: or fopen before exists - pushes for review - Model: opencode/muse-spark-1.1 via api.meta.ai same key, tmux visible engineer window 2:engineer on iMac .124, persistent session opencode handles cache better per user - Branch feature/immich-elias-client	2026-07-25 13:40:50 -04:00
Hermes Reyna Bot	3a2e6f3f11	feat(ImmichElias): implement Elias photo browser client - Define IMMICH_BASE_URL as http://192.168.68.110:2283 and API key, person IDs - Photo struct with id, thumbnail_url, width, height, fileCreatedAt - Global photos array, count, current index - HTTP helpers using esp_http_client with x-api-key header - fetch_person_assets() POSTs to /api/search/metadata with personIds, parses cJSON {assets:{items:[...]}} - download_thumbnail() GETs /api/assets/{id}/thumbnail?size=thumbnail (12KB WebP) with fallback note for preview=238KB JPEG for RAM safety - UI: toolbar, title "Elias - 10739 photos", count label, img placeholder, prev/next 60x40 bottom, info label with asset id/date/size - FreeRTOS tasks for fetch + thumb to avoid blocking LVGL - Proper aspect no stretch, uses lvgl_get_text_font(SMALL/DEFAULT/LARGE) - Builds clean for esp32s3, 0 missing symbols verified via nm -D - CMake: fix TACTILITY_SDK_PATH and cJSON inclusion via json component source - Tested Immich API locally: metadata search returns 10739-capable, thumbnail endpoints working Co-Authored-By: internal-model	2026-07-25 12:35:54 -04:00