public virtual void Replace(InstructionBase instr)
{
if (_list == null)
{
return;
}
var ix = _list._instructions.IndexOf(this);
instr._list = _list;
if (instr == null)
{
_list.RemoveAt(ix);
}
else
{
_list[ix] = instr;
}
foreach (var e in _exceptionBlocks)
{
if (e.BeginInstruction == this)
{
e.BeginInstruction = instr;
}
if (e.HandlerInstruction == this)
{
e.HandlerInstruction = instr;
}
if (e.FilterInstruction == this)
{
e.FilterInstruction = instr;
}
if (e.EndInstruction == this)
{
e.EndInstruction = instr;
}
}
_exceptionBlocks.Clear();
foreach (var l in _referencedBy)
{
if (l is SwitchInstruction)
{
((SwitchInstruction)l).ReplaceAll(this, instr);
}
else if (l is LabelInstruction)
{
((LabelInstruction)l).JumpToInstruction = instr;
}
else
{
throw new InvalidOperationException();
}
}
_referencedBy.Clear();
_list = null;
}
public void Add(InstructionBase item)
{
if (item != null)
{
_jumpToInstructions.Add(item);
item._referencedBy.Add(this);
}
}
public void Insert(int index, InstructionBase item)
{
if (item != null)
{
_jumpToInstructions.Insert(index, item);
item._referencedBy.Add(this);
}
}
public void ReplaceAll(InstructionBase item, InstructionBase newItem)
{
int index;
while ((index = _jumpToInstructions.IndexOf(item)) >= 0)
{
this[index] = newItem;
}
}
public bool Remove(InstructionBase item)
{
if (item == null)
{
return(false);
}
if (_jumpToInstructions.Remove(item))
{
if (!_jumpToInstructions.Contains(item))
{
item._referencedBy.Remove(this);
}
return(true);
}
return(false);
}
private void LinkInstruction(ref InstructionBase current, InstructionBase value)
{
if (current == value)
{
return;
}
if (current != null)
{
current._exceptionBlocks.Remove(this);
}
if (value != null)
{
value._exceptionBlocks.Add(this);
}
current = value;
}
internal override void ParseOperand()
{
JumpToInstruction = _list._instructions.First(x => x.LineNumber == _offset);
}
public static InstructionBase Parse(byte[] data, ref int offset, InstructionList list)
{
int line = offset;
int op = data[offset++];
if (op == 0xfe)
{
op = 0xfe00 | data[offset++];
}
InstructionBase inst = null;
var opCode = OpCodeList.ByValue[op];
switch (opCode.OperandType)
{
case OperandType.ShortInlineBrTarget:
case OperandType.InlineBrTarget: inst = new LabelInstruction(); break;
case OperandType.InlineField: inst = new FieldInstruction(); break;
case OperandType.InlineI: inst = new Int32Instruction(); break;
case OperandType.InlineI8: inst = new Int64Instruction(); break;
case OperandType.InlineMethod: inst = new MethodInstruction(); break;
case OperandType.InlineNone:
switch ((ILCode)op)
{
case ILCode.Ldarg_0:
case ILCode.Ldarg_1:
case ILCode.Ldarg_2:
case ILCode.Ldarg_3:
inst = new ParameterInstruction();
break;
case ILCode.Stloc_0:
case ILCode.Ldloc_0:
case ILCode.Stloc_1:
case ILCode.Ldloc_1:
case ILCode.Stloc_2:
case ILCode.Ldloc_2:
case ILCode.Stloc_3:
case ILCode.Ldloc_3:
inst = new LocalInstruction();
break;
case ILCode.Ldc_I4_0:
case ILCode.Ldc_I4_1:
case ILCode.Ldc_I4_2:
case ILCode.Ldc_I4_3:
case ILCode.Ldc_I4_4:
case ILCode.Ldc_I4_5:
case ILCode.Ldc_I4_6:
case ILCode.Ldc_I4_7:
case ILCode.Ldc_I4_8:
case ILCode.Ldc_I4_M1:
inst = new Int32Instruction();
break;
default:
inst = new InstructionBase();
break;
}
break;
case OperandType.InlineR: inst = new DoubleInstruction(); break;
case OperandType.InlineSig: inst = new SignatureInstruction(); break;
case OperandType.InlineString: inst = new StringInstruction(); break;
case OperandType.InlineSwitch: inst = new SwitchInstruction(); break;
case OperandType.InlineTok: inst = new MemberInstruction(); break;
case OperandType.InlineType: inst = new TypeInstruction(); break;
case OperandType.InlineVar:
inst = (opCode == OpCodes.Ldarg || opCode == OpCodes.Ldarga || opCode == OpCodes.Starg) ? (InstructionBase) new ParameterInstruction() : new LocalInstruction();
break;
case OperandType.ShortInlineVar:
inst = (opCode == OpCodes.Ldarga_S || opCode == OpCodes.Ldarg_S || opCode == OpCodes.Starg_S) ? (InstructionBase) new ParameterInstruction() : new LocalInstruction();
break;
case OperandType.ShortInlineI: inst = new Int8Instruction(); break;
case OperandType.ShortInlineR: inst = new SingleInstruction(); break;
default: throw new InvalidOperationException();
}
inst._lineNumber = line;
inst._opCode = opCode;
inst._list = list;
inst.ReadOperand(data, ref offset);
return(inst);
}
public bool Contains(InstructionBase item)
{
return(_jumpToInstructions.Contains(item));
}
public int IndexOf(InstructionBase item)
{
return(_jumpToInstructions.IndexOf(item));
}
