public static int GetExactSize(this TypeSig type)
{
if (type.ElementType == ElementType.ValueType)
{
var typeDefOrRef = type.TryGetTypeDefOrRef();
var typeDef = typeDefOrRef.ResolveTypeDef();
if (typeDef != null)
{
var typeSize = 0;
if (typeDef.IsEnum)
{
typeSize = TypeList.GetExactSize(typeDef.GetEnumUnderlyingType().GetStackValueKind());
}
else
{
foreach (var field in typeDef.Fields)
{
if (field.FieldOffset.HasValue)
{
Debug.Assert(typeSize == field.FieldOffset.Value);
}
field.FieldOffset = (uint)typeSize;
typeSize += GetExactSize(field.FieldType);
}
}
return(typeSize);
}
else
{
throw new Exception("Could not resolve type def");
}
}
else
{
if (type.ElementType == ElementType.Class)
{
var typeDefOrRef = type.TryGetTypeDefOrRef();
var typeDef = typeDefOrRef.ResolveTypeDef();
if (typeDef != null)
{
typeDef.ClassSize = 0;
foreach (var field in typeDef.Fields)
{
field.FieldOffset = typeDef.ClassSize;
typeDef.ClassSize += (uint)GetExactSize(field.FieldType);
}
}
}
return(TypeList.GetExactSize(type.GetStackValueKind()));
}
}
private void InitReturnBufferArg(TypeSig returnType, bool hasThis)
{
if (returnType.IsStruct())
{
var returnBuffer = new LocalVariableDescriptor()
{
IsParameter = true,
Kind = StackValueKind.ByRef,
IsTemp = false,
ExactSize = TypeList.GetExactSize(StackValueKind.ByRef),
};
// Ensure return buffer parameter goes after the this parameter if present
_returnBufferArgIndex = hasThis ? 1 : 0;
_localVariableTable.Insert(_returnBufferArgIndex.Value, returnBuffer);
_parameterCount++;
}
}
