Change Typed Array endianness

arrayToNative.js

ArrayBuffer.littleEndian = new Int8Array(new Int16Array([1]).buffer)[0] > 0;

var arrayToNative = function(array, arrayIsLittleEndian) {
  if (!!arrayIsLittleEndian == ArrayBuffer.littleEndian) {
    return array;
  } else {
    return flipArrayEndianness(array);
  }
};

var nativeToEndian = function(array, littleEndian) {
  if (ArrayBuffer.littleEndian == !!littleEndian) {
    return array;
  } else {
    return flipArrayEndianness(array);
  }
};

var flipArrayEndianness = function(array) {
  var u8 = new Uint8Array(array.buffer, array.byteOffset, array.byteLength);
  for (var i=0; i<array.byteLength; i+=array.BYTES_PER_ELEMENT) {
    for (var j=i+elementSize-1, k=i; j>k; j--, k++) {
      var tmp = u8[k];
      u8[k] = u8[j];
      u8[j] = tmp;
    }
  }
  return array;
};