Adolfo Reyna
41 lines
1.2 KiB
JavaScript
41 lines
1.2 KiB
JavaScript
"use strict";
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Object.defineProperty(exports, "__esModule", { value: true });
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exports.random = void 0;
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function mulberry32(a) {
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let t = a + 0x6d2b79f5;
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t = Math.imul(t ^ (t >>> 15), t | 1);
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t ^= t + Math.imul(t ^ (t >>> 7), t | 61);
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return ((t ^ (t >>> 14)) >>> 0) / 4294967296;
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}
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function hashCode(str) {
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let i = 0;
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let chr = 0;
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let hash = 0;
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for (i = 0; i < str.length; i++) {
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chr = str.charCodeAt(i);
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hash = (hash << 5) - hash + chr;
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hash |= 0; // Convert to 32bit integer
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}
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return hash;
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}
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/*
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* @description A deterministic pseudo-random number generator. Pass in the same seed and get the same pseudorandom number.
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* @see [Documentation](https://www.remotion.dev/docs/random)
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*/
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const random = (seed, dummy) => {
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if (dummy !== undefined) {
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throw new TypeError('random() takes only one argument');
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}
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if (seed === null) {
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return Math.random();
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}
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if (typeof seed === 'string') {
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return mulberry32(hashCode(seed));
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}
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if (typeof seed === 'number') {
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return mulberry32(seed * 10000000000);
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}
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throw new Error('random() argument must be a number or a string');
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};
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exports.random = random;
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