TUP.AsmResolver.NET.Specialized.MSIL.MSILInstruction.CalculateStackModification C# (CSharp) Method

        public int CalculateStackModification()
        {
            int stackModification = 0;
            switch (OpCode.StackBehaviourPop)
            {
                case StackBehaviour.Pop1:
                case StackBehaviour.Popi:
                case StackBehaviour.Popref:
                    stackModification--;
                    break;
                case StackBehaviour.Pop1_pop1:
                case StackBehaviour.Popi_pop1:
                case StackBehaviour.Popi_popi:
                case StackBehaviour.Popi_popi8:
                case StackBehaviour.Popi_popr4:
                case StackBehaviour.Popi_popr8:
                case StackBehaviour.Popref_pop1:
                case StackBehaviour.Popref_popi:
                    stackModification -= 2;
                    break;
                case StackBehaviour.Popi_popi_popi:
                case StackBehaviour.Popref_popi_pop1:
                case StackBehaviour.Popref_popi_popi:
                case StackBehaviour.Popref_popi_popi8:
                case StackBehaviour.Popref_popi_popr4:
                case StackBehaviour.Popref_popi_popr8:
                case StackBehaviour.Popref_popi_popref:
                    stackModification -= 3;
                    break;
                case StackBehaviour.Varpop:
                    if (Operand is MethodReference)
                    {
                        MethodReference methodRef = Operand as MethodReference;
                        if (methodRef.Signature != null)
                        {
                            if (methodRef.Signature.HasParameters)
                                stackModification -= methodRef.Signature.Parameters.Length;

                            if (methodRef.Signature.HasThis)
                                stackModification--;
                        }
                    }
                    break;
            }

            switch (OpCode.StackBehaviourPush)
            {
                case StackBehaviour.Push1:
                case StackBehaviour.Pushi:
                case StackBehaviour.Pushi8:
                case StackBehaviour.Pushr4:
                case StackBehaviour.Pushr8:
                case StackBehaviour.Pushref:
                    stackModification++;
                    break;
                case StackBehaviour.Push1_push1:
                    stackModification += 2;
                    break;
                case StackBehaviour.Varpush:
                    if (Operand is MethodReference)
                    {
                        MethodReference methodRef = Operand as MethodReference;
                        if (methodRef.Signature != null)
                            if (methodRef.Signature.ReturnType.FullName != "System.Void")
                                stackModification++;
                    }
                    break;
            }

            return stackModification;
        }