{
            throw new IOException("invalid long form definite-length 0xFF");
        }

        int octetsCount = length & 0x7F, octetsPos = 0;

        length = 0;
        do
        {
            int octet = s.read();
            if (octet < 0)
            {
                throw new EOFException("EOF found reading length");
            }

            if ((length >>> 23) != 0)