LFib.js

// From http://baagoe.com/en/RandomMusings/javascript/
function LFib() {
  return (function(args) {
    // Johannes Baagøe <baagoe@baagoe.com>, 2010
    var k0 = 255,
        k1 = 52,
        k2 = 0;
    var s = [];

    var mash = Mash();
    if (args.length === 0) {
      args = [+new Date()];
    }
    for (var j = 0; j < 256; j++) {
      s[j] = mash(' ');
      s[j] -= mash(' ') * 4.76837158203125e-7; // 2^-21
      if (s[j] < 0) {
        s[j] += 1;
      }
    }
    for (var i = 0; i < args.length; i++) {
      for (var j = 0; j < 256; j++) {
        s[j] -= mash(args[i]);
        s[j] -= mash(args[i]) * 4.76837158203125e-7; // 2^-21
        if (s[j] < 0) {
          s[j] += 1;
        }
      }
    }
    mash = null;

    var random = function() {
      k0 = (k0 + 1) & 255;
      k1 = (k1 + 1) & 255;
      k2 = (k2 + 1) & 255;

      var x = s[k0] - s[k1];
      if (x < 0.0) {
        x += 1.0;
      }
      x -= s[k2];
      if (x < 0.0) {
        x += 1.0;
      }
      return s[k0] = x;
    }

    random.uint32 = function() {
      return random() * 0x100000000 >>> 0; // 2^32
    };
    random.fract53 = random;
    random.version = 'LFib 0.9';
    random.args = args;

    return random;
  } (Array.prototype.slice.call(arguments)));
};