public static void Write(IAssemblyMetadata metadata, IReadOnlyList <Instruction> il)
{
for (var i = 0; i < il.Count; i++)
{
var opCode = il[i].OpCode;
opCode.WriteOpCode(metadata.ILBuilder.WriteByte);
switch (opCode.OperandType)
{
case OperandType.InlineNone:
break;
case OperandType.InlineSwitch:
var branches = (int[])il[i].Operand;
metadata.ILBuilder.WriteInt32(branches.Length);
for (var k = 0; k < branches.Length; k++)
{
var branchOffset = branches[k];
metadata.ILBuilder.WriteInt32(branchOffset);
}
break;
case OperandType.ShortInlineBrTarget:
var offset8 = (sbyte)il[i].Operand;
metadata.ILBuilder.WriteSByte(offset8);
break;
case OperandType.InlineBrTarget:
var offset32 = (int)il[i].Operand;
// offset convention in IL: zero is at next instruction
metadata.ILBuilder.WriteInt32(offset32);
break;
case OperandType.ShortInlineI:
if (opCode == OpCodes.Ldc_I4_S)
{
metadata.ILBuilder.WriteSByte((sbyte)il[i].Operand);
}
else
{
metadata.ILBuilder.WriteByte((byte)il[i].Operand);
}
break;
case OperandType.InlineI:
metadata.ILBuilder.WriteInt32((int)il[i].Operand);
break;
case OperandType.ShortInlineR:
metadata.ILBuilder.WriteSingle((float)il[i].Operand);
break;
case OperandType.InlineR:
metadata.ILBuilder.WriteDouble((double)il[i].Operand);
break;
case OperandType.InlineI8:
metadata.ILBuilder.WriteInt64((long)il[i].Operand);
break;
case OperandType.InlineSig:
metadata.ILBuilder.WriteBytes((byte[])il[i].Operand);
break;
case OperandType.InlineString:
metadata.ILBuilder.WriteInt32(
MetadataTokens.GetToken(metadata.GetOrAddUserString((string)il[i].Operand)));
break;
case OperandType.InlineType:
case OperandType.InlineTok:
case OperandType.InlineMethod:
case OperandType.InlineField:
switch (il[i].Operand)
{
case Type type:
metadata.ILBuilder.WriteInt32(MetadataTokens.GetToken(metadata.GetTypeHandle(type)));
break;
case ConstructorInfo constructorInfo:
metadata.ILBuilder.WriteInt32(
MetadataTokens.GetToken(metadata.GetConstructorHandle(constructorInfo)));
break;
case FieldInfo fieldInfo:
metadata.ILBuilder.WriteInt32(
MetadataTokens.GetToken(metadata.GetFieldHandle(fieldInfo)));
break;
case MethodInfo methodInfo:
metadata.ILBuilder.WriteInt32(
MetadataTokens.GetToken(metadata.GetMethodHandle(methodInfo)));
break;
default:
throw new NotSupportedException($"Unsupported inline operand: {il[i].Operand}");
}
break;
case OperandType.ShortInlineVar:
var bLocalVariableInfo = il[i].Operand as LocalVariableInfo;
var bParameterInfo = il[i].Operand as ParameterInfo;
if (bLocalVariableInfo != null)
{
metadata.ILBuilder.WriteByte((byte)bLocalVariableInfo.LocalIndex);
}
else if (bParameterInfo != null)
{
metadata.ILBuilder.WriteByte((byte)bParameterInfo.Position);
}
else
{
throw new NotSupportedException($"Unsupported short inline variable: {il[i].Operand}");
}
break;
case OperandType.InlineVar:
var sLocalVariableInfo = il[i].Operand as LocalVariableInfo;
var sParameterInfo = il[i].Operand as ParameterInfo;
if (sLocalVariableInfo != null)
{
metadata.ILBuilder.WriteUInt16((ushort)sLocalVariableInfo.LocalIndex);
}
else if (sParameterInfo != null)
{
metadata.ILBuilder.WriteUInt16((ushort)sParameterInfo.Position);
}
else
{
throw new NotSupportedException($"Unsupported inline variable: {il[i].Operand}");
}
break;
default:
throw new NotSupportedException($"Unsupported operand type: {opCode.OperandType}");
}
}
}