GNIDA.mediana.parse_modrm_sib C# (CSharp) Method

        static byte parse_modrm_sib(long offset, ref INSTRUCTION instr, OPCODE_DESCRIPTOR opcode)
        {
            byte len = 0;

            if ((opcode.props & PROP_MODRM)!=0)
            {
            len++;
            instr.flags |= INSTR_FLAG_MODRM;
            //instr.modrm = *offset;
            instr.modrm = assembly.Image.ReadBytes(offset, 1)[0];
            if (instr.addrsize != ADDR_SIZE_16)
            {
            if ((instr.modrm & 0x7) == 0x4 && (instr.modrm & 0xC0) != 0xC0)
            {
                len++;
                instr.flags |= INSTR_FLAG_SIB;
                //instr.sib = offset[1];
                instr.sib = instr.modrm = assembly.Image.ReadBytes(offset, 2)[1];
            }
            }
            }
            return len;
        }