blockies-ts/dist/cjs/random.js

Typescript version of Ethereum blockies

"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
exports.randArr = new Array(4);
function seedRandomness(seed) {
    let i;
    for (i = 0; i < exports.randArr.length; i++) {
        exports.randArr[i] = 0;
    }
    for (i = 0; i < seed.length; i++) {
        exports.randArr[i % 4] =
            (exports.randArr[i % 4] << 5) - exports.randArr[i % 4] + seed.charCodeAt(i);
    }
}
exports.seedRandomness = seedRandomness;
function random() {
    let t = exports.randArr[0] ^ (exports.randArr[0] << 11);
    exports.randArr[0] = exports.randArr[1];
    exports.randArr[1] = exports.randArr[2];
    exports.randArr[2] = exports.randArr[3];
    exports.randArr[3] = exports.randArr[3] ^ (exports.randArr[3] >> 19) ^ t ^ (t >> 8);
    return (exports.randArr[3] >>> 0) / ((1 << 31) >>> 0);
}
exports.random = random;
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