code: function rev32_(n) {
      return (Zlib.BitStream.ReverseTable[n & 0xFF] << 24) |
        (Zlib.BitStream.ReverseTable[n >>> 8 & 0xFF] << 16) |
        (Zlib.BitStream.ReverseTable[n >>> 16 & 0xFF] << 8) |
        Zlib.BitStream.ReverseTable[n >>> 24 & 0xFF];
    }
docs: 32-bit 整数のビット順を逆にする
  @param {number} n 32-bit integer.
  @return {number} reversed 32-bit integer.
  @private