internal static LocalBuilder DeclareLocalVariable(ILGenerator generator, Type type)
{
if (type.IsByRef)
{
type = type.GetElementType();
}
if (type.IsEnum)
{
type = Enum.GetUnderlyingType(type);
}
if (AccessTools.IsClass(type))
{
var v = generator.DeclareLocal(type);
Emitter.Emit(generator, OpCodes.Ldnull);
Emitter.Emit(generator, OpCodes.Stloc, v);
return(v);
}
if (AccessTools.IsStruct(type))
{
var v = generator.DeclareLocal(type);
Emitter.Emit(generator, OpCodes.Ldloca, v);
Emitter.Emit(generator, OpCodes.Initobj, type);
return(v);
}
if (AccessTools.IsValue(type))
{
var v = generator.DeclareLocal(type);
if (type == typeof(float))
{
Emitter.Emit(generator, OpCodes.Ldc_R4, (float)0);
}
else if (type == typeof(double))
{
Emitter.Emit(generator, OpCodes.Ldc_R8, (double)0);
}
else if (type == typeof(long) || type == typeof(ulong))
{
Emitter.Emit(generator, OpCodes.Ldc_I8, (long)0);
}
else
{
Emitter.Emit(generator, OpCodes.Ldc_I4, 0);
}
Emitter.Emit(generator, OpCodes.Stloc, v);
return(v);
}
return(null);
}
LocalBuilder DeclareLocalVariable(Type type, bool isReturnValue = false)
{
if (type.IsByRef && isReturnValue == false)
{
type = type.GetElementType();
}
if (type.IsEnum)
{
type = Enum.GetUnderlyingType(type);
}
if (AccessTools.IsClass(type))
{
var v = il.DeclareLocal(type);
emitter.Emit(OpCodes.Ldnull);
emitter.Emit(OpCodes.Stloc, v);
return(v);
}
if (AccessTools.IsStruct(type))
{
var v = il.DeclareLocal(type);
emitter.Emit(OpCodes.Ldloca, v);
emitter.Emit(OpCodes.Initobj, type);
return(v);
}
if (AccessTools.IsValue(type))
{
var v = il.DeclareLocal(type);
if (type == typeof(float))
{
emitter.Emit(OpCodes.Ldc_R4, (float)0);
}
else if (type == typeof(double))
{
emitter.Emit(OpCodes.Ldc_R8, (double)0);
}
else if (type == typeof(long) || type == typeof(ulong))
{
emitter.Emit(OpCodes.Ldc_I8, (long)0);
}
else
{
emitter.Emit(OpCodes.Ldc_I4, 0);
}
emitter.Emit(OpCodes.Stloc, v);
return(v);
}
return(null);
}
void InitializeOutParameter(int argIndex, Type type)
{
if (type.IsByRef)
{
type = type.GetElementType();
}
emitter.Emit(OpCodes.Ldarg, argIndex);
if (AccessTools.IsStruct(type))
{
emitter.Emit(OpCodes.Initobj, type);
return;
}
if (AccessTools.IsValue(type))
{
if (type == typeof(float))
{
emitter.Emit(OpCodes.Ldc_R4, (float)0);
emitter.Emit(OpCodes.Stind_R4);
return;
}
else if (type == typeof(double))
{
emitter.Emit(OpCodes.Ldc_R8, (double)0);
emitter.Emit(OpCodes.Stind_R8);
return;
}
else if (type == typeof(long))
{
emitter.Emit(OpCodes.Ldc_I8, (long)0);
emitter.Emit(OpCodes.Stind_I8);
return;
}
else
{
emitter.Emit(OpCodes.Ldc_I4, 0);
emitter.Emit(OpCodes.Stind_I4);
return;
}
}
// class or default
emitter.Emit(OpCodes.Ldnull);
emitter.Emit(OpCodes.Stind_Ref);
}
static bool PrefixAffectsOriginal(MethodInfo fix)
{
if (fix.ReturnType == typeof(bool))
{
return(true);
}
return(fix.GetParameters().Any(p =>
{
var name = p.Name;
var type = p.ParameterType;
if (name == INSTANCE_PARAM)
{
return false;
}
if (name == ORIGINAL_METHOD_PARAM)
{
return false;
}
if (name == STATE_VAR)
{
return false;
}
if (p.IsOut)
{
return true;
}
if (type.IsByRef)
{
return true;
}
if (AccessTools.IsValue(type) == false && AccessTools.IsStruct(type) == false)
{
return true;
}
return false;
}));
}
