@prismicio/mock/dist/lib/PRNG.js

Generate mock Prismic documents, fields, Slices, and models for development and testing environments

var __defProp = Object.defineProperty;
var __defNormalProp = (obj, key, value) => key in obj ? __defProp(obj, key, { enumerable: true, configurable: true, writable: true, value }) : obj[key] = value;
var __publicField = (obj, key, value) => {
  __defNormalProp(obj, typeof key !== "symbol" ? key + "" : key, value);
  return value;
};
const MIN = -2147483648;
const MAX = 2147483647;
const xorshift = (value) => {
  value ^= value << 13;
  value ^= value >> 17;
  value ^= value << 5;
  return value;
};
class PRNG {
  /**
   * Generate a new pseudo-random number generator.
   *
   * @param seed - A number or string seed that determines which pseudo-random
   *   number sequence will be created.
   */
  constructor(seed) {
    __publicField(this, "_value");
    if (typeof seed === "string") {
      let hash = 0;
      if (seed) {
        const l = seed.length;
        for (let i = 0; i < l; i++) {
          hash = (hash << 5) - hash + seed.charCodeAt(i);
          hash |= 0;
          hash = xorshift(hash);
        }
      }
      this._value = hash;
    } else {
      this._value = seed;
    }
    if (this._value === 0) {
      this._value = 1;
    }
  }
  /**
   * Generates a pseudo-random number.
   *
   * @returns The generated pseudo-random number.
   */
  next() {
    this._value = xorshift(this._value);
    return (this._value - MIN) / (MAX - MIN);
  }
}
export {
  PRNG
};
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