private function getEndianess()
    {
        if (0 === self::$endianess) {
            self::$endianess = $this->fromInt32("\x01\x00\x00\x00") == 1
                             ? self::LITTLE_ENDIAN_ORDER
                             : self::BIG_ENDIAN_ORDER;
        }
        return self::$endianess;
    }