private ushort OperandToLocalIndex(CilInstruction instruction)
{
int variableIndex = _operandBuilder.GetVariableIndex(instruction.Operand);
if (instruction.OpCode.OperandType == CilOperandType.ShortInlineVar && variableIndex > byte.MaxValue)
{
throw new OverflowException(
$"Local index at offset IL_{instruction.Offset:X4} is too large for a ShortInlineVar instruction.");
}
return(unchecked ((ushort)variableIndex));
}
private ushort OperandToLocalIndex(CilInstruction instruction)
{
int variableIndex = _operandBuilder.GetVariableIndex(instruction.Operand);
if (instruction.OpCode.OperandType == CilOperandType.ShortInlineVar && variableIndex > byte.MaxValue)
{
_errorListener.RegisterException(new OverflowException(
$"{_diagnosticPrefix}Local index at IL_{instruction.Offset:X4} is too large for a ShortInlineVar instruction."));
}
return(unchecked ((ushort)variableIndex));
}
private void WriteOperand(CilInstruction instruction)
{
switch (instruction.OpCode.OperandType)
{
case CilOperandType.InlineNone:
break;
case CilOperandType.ShortInlineI:
_writer.WriteSByte((sbyte)instruction.Operand);
break;
case CilOperandType.InlineI:
_writer.WriteInt32((int)instruction.Operand);
break;
case CilOperandType.InlineI8:
_writer.WriteInt64((long)instruction.Operand);
break;
case CilOperandType.ShortInlineR:
_writer.WriteSingle((float)instruction.Operand);
break;
case CilOperandType.InlineR:
_writer.WriteDouble((double)instruction.Operand);
break;
case CilOperandType.ShortInlineVar:
_writer.WriteSByte((sbyte)_operandBuilder.GetVariableIndex(instruction.Operand));
break;
case CilOperandType.InlineVar:
_writer.WriteUInt16((ushort)_operandBuilder.GetVariableIndex(instruction.Operand));
break;
case CilOperandType.ShortInlineArgument:
_writer.WriteSByte((sbyte)_operandBuilder.GetArgumentIndex(instruction.Operand));
break;
case CilOperandType.InlineArgument:
_writer.WriteUInt16((ushort)_operandBuilder.GetArgumentIndex(instruction.Operand));
break;
case CilOperandType.ShortInlineBrTarget:
sbyte shortOffset = (sbyte)(((ICilLabel)instruction.Operand).Offset - (int)(_writer.Offset + sizeof(sbyte)));
_writer.WriteSByte(shortOffset);
break;
case CilOperandType.InlineBrTarget:
int longOffset = ((ICilLabel)instruction.Operand).Offset - (int)(_writer.Offset + sizeof(int));
_writer.WriteInt32(longOffset);
break;
case CilOperandType.InlineSwitch:
var labels = (IList <ICilLabel>)instruction.Operand;
_writer.WriteInt32(labels.Count);
int baseOffset = (int)_writer.Offset + labels.Count * sizeof(int);
for (int i = 0; i < labels.Count; i++)
{
_writer.WriteInt32(labels[i].Offset - baseOffset);
}
break;
case CilOperandType.InlineString:
_writer.WriteUInt32(_operandBuilder.GetStringToken(instruction.Operand));
break;
case CilOperandType.InlineField:
case CilOperandType.InlineMethod:
case CilOperandType.InlineSig:
case CilOperandType.InlineTok:
case CilOperandType.InlineType:
_writer.WriteUInt32(_operandBuilder.GetMemberToken(instruction.Operand).ToUInt32());
break;
default:
throw new ArgumentOutOfRangeException();
}
}