tentone.escher.js/source/math/UUID.js

"use strict";

/**
 * Class to implement UUID generation methods.
 *
 * @class
 */
function UUID(){}

/**
 * Generate new random UUID v4 as string.
 *
 * http://stackoverflow.com/questions/105034/how-to-create-a-guid-uuid-in-javascript/21963136#21963136
 *
 * @static
 */
UUID.generate = (function ()
{
	var lut = [];

	for(var i = 0; i < 256; i++)
	{
		lut[i] = (i < 16 ? "0" : "") + (i).toString(16);
	}

	return function generateUUID()
	{
		var d0 = Math.random() * 0XFFFFFFFF | 0;
		var d1 = Math.random() * 0XFFFFFFFF | 0;
		var d2 = Math.random() * 0XFFFFFFFF | 0;
		var d3 = Math.random() * 0XFFFFFFFF | 0;

		var uuid = lut[d0 & 0xff] + lut[d0 >> 8 & 0xff] + lut[d0 >> 16 & 0xff] + lut[d0 >> 24 & 0xff] + "-" +
			lut[d1 & 0xff] + lut[d1 >> 8 & 0xff] + "-" + lut[d1 >> 16 & 0x0f | 0x40] + lut[d1 >> 24 & 0xff] + "-" +
			lut[d2 & 0x3f | 0x80] + lut[d2 >> 8 & 0xff] + "-" + lut[d2 >> 16 & 0xff] + lut[d2 >> 24 & 0xff] +
			lut[d3 & 0xff] + lut[d3 >> 8 & 0xff] + lut[d3 >> 16 & 0xff] + lut[d3 >> 24 & 0xff];

		return uuid.toUpperCase();
	};
})();

export {UUID};