AsmResolver.X86.X86Instruction.GetTotalOperandSize C# (CSharp) Method

        private static int GetTotalOperandSize(X86OperandType operandType, X86OperandSize operandSize, X86Operand operand)
        {
            int size = (int)operand.OffsetType;
            switch (operandType)
            {
                case X86OperandType.None:
                case X86OperandType.ControlRegister:
                case X86OperandType.DebugRegister:
                case X86OperandType.StackRegister:
                case X86OperandType.Register:
                case X86OperandType.RegisterCl:
                case X86OperandType.RegisterDx:
                case X86OperandType.RegisterEax:
                case X86OperandType.RegisterAl:
                case X86OperandType.ImmediateOne:
                case X86OperandType.SegmentRegister:
                case X86OperandType.OpCodeRegister:
                    break;

                case X86OperandType.DirectAddress:
                case X86OperandType.MemoryAddress:
                    size += 4;
                    break;

                case X86OperandType.RelativeOffset:
                case X86OperandType.ImmediateData:
                    size += GetSize(operandSize);
                    break;

                case X86OperandType.RegisterOrMemoryAddress:
                case X86OperandType.StackRegisterOrMemoryAddress:
                    if ((operand.ScaledIndex != null) ||
                        (operand.OperandUsage != X86OperandUsage.Normal && operand.Value is X86Register &&
                         (X86Register)operand.Value == X86Register.Esp))
                        size += 1;
                    if (!(operand.Value is X86Register))
                        size += 4;
                    break;
            }

            return size;
        }