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

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

//#region src/lib/PRNG.ts
/**
* The following code is a modified version of Prando from `zeh/prando` on GitHub.
*
* Source: https://github.com/zeh/prando/blob/acc2a3c09df12a41b5c82fbf44e49e070e6f60ac/src/Prando.ts
*
* The MIT License (MIT)
*
* Copyright (c) 2016 Zeh Fernando
*
* 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.
*/
const MIN = -2147483648;
const MAX = 2147483647;
const xorshift = (value) => {
	value ^= value << 13;
	value ^= value >> 17;
	value ^= value << 5;
	return value;
};
/** Pseudorandom number generator. */
var PRNG = class {
	_value;
	/**
	* 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) {
		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);
	}
};
//#endregion
export { PRNG };

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