Yaffle

function crc32(s/*, polynomial = 0x04C11DB7, initialValue = 0xFFFFFFFF, finalXORValue = 0xFFFFFFFF*/) {
  s = String(s);
  var polynomial = arguments.length < 2 ? 0x04C11DB7 : (arguments[1] >>> 0);
  var initialValue = arguments.length < 3 ? 0xFFFFFFFF : (arguments[2] >>> 0);
  var finalXORValue = arguments.length < 4 ? 0xFFFFFFFF : (arguments[3] >>> 0);
  var table = new Array(256);

  var reverse = function (x, n) {
    var b = 0;