Implement crash handler and diagnostics app (#119)

2024-12-12 22:38:48 +01:00
parent 74a53b2735
commit 51c6aaa428
38 changed files with 3717 additions and 24 deletions
@@ -0,0 +1,27 @@
+#include <cstdint>
+#include <cassert>
+#include "QrHelpers.h"
+
+/**
+ * Maps QR version (starting at a fictitious 0)  to the usable byte size for L(ow) CRC checking QR.
+ *
+ * See https://www.qrcode.com/en/about/version.html
+ */
+uint16_t qr_version_binary_sizes[] = {
+    0, 17, 32, 53, 78, 106, 134, 154, 192, 230, // 0 - 9
+    271, 321, 367, 425, 458, 520, 586, 644, 718, 792, // 10-19
+    858, 929, 1003, 1091, 1171, 1273, 1367, 1465, 1528, 1682, // 20-29
+    1732, 1840, 1952, 2068, 2188, 2303, 2431, 2563, 2699, 2809, 2953 // 30-40
+};
+
+bool getQrVersionForBinaryDataLength(size_t inLength, int& outVersion) {
+    static_assert(sizeof(qr_version_binary_sizes) == 41 * sizeof(int16_t));
+    for (int version = 1; version < 41; version++) {
+        if (inLength <= qr_version_binary_sizes[version]) {
+            outVersion = version;
+            return true;
+        }
+    }
+    return false;
+}
+