public override void VisitMethodBody(MethodBody body)
{
m_codeWriter.Empty();
}
public override void VisitInstructionCollection(InstructionCollection instructions)
{
MethodBody body = instructions.Container;
long start = m_codeWriter.BaseStream.Position;
ComputeMaxStack(instructions);
foreach (Instruction instr in instructions)
{
instr.Offset = (int)(m_codeWriter.BaseStream.Position - start);
if (instr.OpCode.Size == 1)
{
m_codeWriter.Write(instr.OpCode.Op2);
}
else
{
m_codeWriter.Write(instr.OpCode.Op1);
m_codeWriter.Write(instr.OpCode.Op2);
}
if (instr.OpCode.OperandType != OperandType.InlineNone &&
instr.Operand == null)
{
throw new ReflectionException("OpCode {0} have null operand", instr.OpCode.Name);
}
switch (instr.OpCode.OperandType)
{
case OperandType.InlineNone:
break;
case OperandType.InlineSwitch:
Instruction [] targets = (Instruction [])instr.Operand;
for (int i = 0; i < targets.Length + 1; i++)
{
m_codeWriter.Write((uint)0);
}
break;
case OperandType.ShortInlineBrTarget:
m_codeWriter.Write((byte)0);
break;
case OperandType.InlineBrTarget:
m_codeWriter.Write(0);
break;
case OperandType.ShortInlineI:
if (instr.OpCode == OpCodes.Ldc_I4_S)
{
m_codeWriter.Write((sbyte)instr.Operand);
}
else
{
m_codeWriter.Write((byte)instr.Operand);
}
break;
case OperandType.ShortInlineVar:
m_codeWriter.Write((byte)body.Variables.IndexOf(
(VariableDefinition)instr.Operand));
break;
case OperandType.ShortInlineParam:
m_codeWriter.Write((byte)GetParameterIndex(body, (ParameterDefinition)instr.Operand));
break;
case OperandType.InlineSig:
WriteToken(GetCallSiteToken((CallSite)instr.Operand));
break;
case OperandType.InlineI:
m_codeWriter.Write((int)instr.Operand);
break;
case OperandType.InlineVar:
m_codeWriter.Write((short)body.Variables.IndexOf(
(VariableDefinition)instr.Operand));
break;
case OperandType.InlineParam:
m_codeWriter.Write((short)GetParameterIndex(
body, (ParameterDefinition)instr.Operand));
break;
case OperandType.InlineI8:
m_codeWriter.Write((long)instr.Operand);
break;
case OperandType.ShortInlineR:
m_codeWriter.Write((float)instr.Operand);
break;
case OperandType.InlineR:
m_codeWriter.Write((double)instr.Operand);
break;
case OperandType.InlineString:
WriteToken(new MetadataToken(TokenType.String,
m_reflectWriter.MetadataWriter.AddUserString(instr.Operand as string)));
break;
case OperandType.InlineField:
case OperandType.InlineMethod:
case OperandType.InlineType:
case OperandType.InlineTok:
if (instr.Operand is TypeReference)
{
WriteToken(GetTypeToken((TypeReference)instr.Operand));
}
else if (instr.Operand is GenericInstanceMethod)
{
WriteToken(m_reflectWriter.GetMethodSpecToken(instr.Operand as GenericInstanceMethod));
}
else if (instr.Operand is MemberReference)
{
WriteToken(m_reflectWriter.GetMemberRefToken((MemberReference)instr.Operand));
}
else if (instr.Operand is IMetadataTokenProvider)
{
WriteToken(((IMetadataTokenProvider)instr.Operand).MetadataToken);
}
else
{
throw new ReflectionException(
string.Format("Wrong operand for {0} OpCode: {1}",
instr.OpCode.OperandType,
instr.Operand.GetType().FullName));
}
break;
}
}
// patch branches
long pos = m_codeWriter.BaseStream.Position;
foreach (Instruction instr in instructions)
{
switch (instr.OpCode.OperandType)
{
case OperandType.InlineSwitch:
m_codeWriter.BaseStream.Position = instr.Offset + instr.OpCode.Size;
Instruction [] targets = (Instruction [])instr.Operand;
m_codeWriter.Write((uint)targets.Length);
foreach (Instruction tgt in targets)
{
m_codeWriter.Write((tgt.Offset - (instr.Offset +
instr.OpCode.Size + (4 * (targets.Length + 1)))));
}
break;
case OperandType.ShortInlineBrTarget:
m_codeWriter.BaseStream.Position = instr.Offset + instr.OpCode.Size;
m_codeWriter.Write((byte)(((Instruction)instr.Operand).Offset -
(instr.Offset + instr.OpCode.Size + 1)));
break;
case OperandType.InlineBrTarget:
m_codeWriter.BaseStream.Position = instr.Offset + instr.OpCode.Size;
m_codeWriter.Write(((Instruction)instr.Operand).Offset -
(instr.Offset + instr.OpCode.Size + 4));
break;
}
}
m_codeWriter.BaseStream.Position = pos;
}