/*
* Calls the method. Receives the arguments from the Lua stack
* and returns values in it.
*/
int Call(IntPtr state)
{
var luaState = LuaState.FromIntPtr(state);
MethodBase methodToCall = _method;
object targetObject = _target;
if (!luaState.CheckStack(5))
{
throw new LuaException("Lua stack overflow");
}
SetPendingException(null);
// Method from name
if (methodToCall == null)
{
return(CallMethodFromName(luaState));
}
// Method from MethodBase instance
if (!methodToCall.ContainsGenericParameters)
{
if (!methodToCall.IsStatic && !methodToCall.IsConstructor && targetObject == null)
{
targetObject = _extractTarget(luaState, 1);
luaState.Remove(1); // Pops the receiver
}
if (!_translator.MatchParameters(luaState, methodToCall, _lastCalledMethod, 0))
{
_translator.ThrowError(luaState, "Invalid arguments to method call");
luaState.PushNil();
return(1);
}
}
else
{
if (!methodToCall.IsGenericMethodDefinition)
{
_translator.ThrowError(luaState,
"Unable to invoke method on generic class as the current method is an open generic method");
luaState.PushNil();
return(1);
}
_translator.MatchParameters(luaState, methodToCall, _lastCalledMethod, 0);
return(CallInvokeOnGenericMethod(luaState, (MethodInfo)methodToCall, targetObject));
}
if (_isStatic)
{
targetObject = null;
}
return(CallInvoke(luaState, _lastCalledMethod.cachedMethod, targetObject));
}
/*
* Calls the method. Receives the arguments from the Lua stack
* and returns values in it.
*/
int Call(IntPtr state)
{
var luaState = LuaState.FromIntPtr(state);
MethodBase methodToCall = _method;
object targetObject = _target;
bool failedCall = true;
int nReturnValues = 0;
if (!luaState.CheckStack(5))
{
throw new LuaException("Lua stack overflow");
}
bool isStatic = _isStatic;
SetPendingException(null);
if (methodToCall == null)
{ // Method from name
if (isStatic)
{
targetObject = null;
}
else
{
targetObject = _extractTarget(luaState, 1);
}
if (_lastCalledMethod.cachedMethod != null)
{ // Cached?
int numStackToSkip = isStatic ? 0 : 1; // If this is an instance invoe we will have an extra arg on the stack for the targetObject
int numArgsPassed = luaState.GetTop() - numStackToSkip;
MethodBase method = _lastCalledMethod.cachedMethod;
if (numArgsPassed == _lastCalledMethod.argTypes.Length)
{ // No. of args match?
if (!luaState.CheckStack(_lastCalledMethod.outList.Length + 6))
{
throw new LuaException("Lua stack overflow");
}
object[] args = _lastCalledMethod.args;
try
{
for (int i = 0; i < _lastCalledMethod.argTypes.Length; i++)
{
MethodArgs type = _lastCalledMethod.argTypes[i];
int index = i + 1 + numStackToSkip;
if (_lastCalledMethod.argTypes[i].IsParamsArray)
{
int count = _lastCalledMethod.argTypes.Length - i;
Array paramArray = _translator.TableToArray(luaState, type.ExtractValue, type.ParamsArrayType, index, count);
args[_lastCalledMethod.argTypes[i].Index] = paramArray;
}
else
{
args[type.Index] = type.ExtractValue(luaState, index);
}
if (_lastCalledMethod.args[_lastCalledMethod.argTypes[i].Index] == null &&
!luaState.IsNil(i + 1 + numStackToSkip))
{
throw new LuaException(string.Format("Argument number {0} is invalid", (i + 1)));
}
}
if (_isStatic)
{
_translator.Push(luaState, method.Invoke(null, _lastCalledMethod.args));
}
else
{
if (method.IsConstructor)
{
_translator.Push(luaState, ((ConstructorInfo)method).Invoke(_lastCalledMethod.args));
}
else
{
_translator.Push(luaState, method.Invoke(targetObject, _lastCalledMethod.args));
}
}
failedCall = false;
}
catch (TargetInvocationException e)
{
// Failure of method invocation
if (_translator.interpreter.UseTraceback)
{
e.GetBaseException().Data["Traceback"] = _translator.interpreter.GetDebugTraceback();
}
return(SetPendingException(e.GetBaseException()));
}
catch (Exception e)
{
if (_members.Length == 1) // Is the method overloaded?
// No, throw error
{
return(SetPendingException(e));
}
}
}
}
// Cache miss
if (failedCall)
{
// System.Diagnostics.Debug.WriteLine("cache miss on " + methodName);
// If we are running an instance variable, we can now pop the targetObject from the stack
if (!isStatic)
{
if (targetObject == null)
{
_translator.ThrowError(luaState, string.Format("instance method '{0}' requires a non null target object", _methodName));
luaState.PushNil();
return(1);
}
luaState.Remove(1); // Pops the receiver
}
bool hasMatch = false;
string candidateName = null;
foreach (var member in _members)
{
candidateName = member.ReflectedType.Name + "." + member.Name;
bool isMethod = _translator.MatchParameters(luaState, member, ref _lastCalledMethod);
if (isMethod)
{
hasMatch = true;
break;
}
}
if (!hasMatch)
{
string msg = (candidateName == null) ? "Invalid arguments to method call" : ("Invalid arguments to method: " + candidateName);
_translator.ThrowError(luaState, msg);
luaState.PushNil();
return(1);
}
}
}
else
{ // Method from MethodBase instance
if (methodToCall.ContainsGenericParameters)
{
_translator.MatchParameters(luaState, methodToCall, ref _lastCalledMethod);
if (methodToCall.IsGenericMethodDefinition)
{
//need to make a concrete type of the generic method definition
var typeArgs = new List <Type>();
foreach (object arg in _lastCalledMethod.args)
{
typeArgs.Add(arg.GetType());
}
var concreteMethod = ((MethodInfo)methodToCall).MakeGenericMethod(typeArgs.ToArray());
_translator.Push(luaState, concreteMethod.Invoke(targetObject, _lastCalledMethod.args));
failedCall = false;
}
else if (methodToCall.ContainsGenericParameters)
{
_translator.ThrowError(luaState, "Unable to invoke method on generic class as the current method is an open generic method");
luaState.PushNil();
return(1);
}
}
else
{
if (!methodToCall.IsStatic && !methodToCall.IsConstructor && targetObject == null)
{
targetObject = _extractTarget(luaState, 1);
luaState.Remove(1); // Pops the receiver
}
if (!_translator.MatchParameters(luaState, methodToCall, ref _lastCalledMethod))
{
_translator.ThrowError(luaState, "Invalid arguments to method call");
luaState.PushNil();
return(1);
}
}
}
if (failedCall)
{
if (!luaState.CheckStack(_lastCalledMethod.outList.Length + 6))
{
throw new LuaException("Lua stack overflow");
}
try
{
if (isStatic)
{
_translator.Push(luaState, _lastCalledMethod.cachedMethod.Invoke(null, _lastCalledMethod.args));
}
else
{
if (_lastCalledMethod.cachedMethod.IsConstructor)
{
_translator.Push(luaState, ((ConstructorInfo)_lastCalledMethod.cachedMethod).Invoke(_lastCalledMethod.args));
}
else
{
_translator.Push(luaState, _lastCalledMethod.cachedMethod.Invoke(targetObject, _lastCalledMethod.args));
}
}
}
catch (TargetInvocationException e)
{
if (_translator.interpreter.UseTraceback)
{
e.GetBaseException().Data["Traceback"] = _translator.interpreter.GetDebugTraceback();
}
return(SetPendingException(e.GetBaseException()));
}
catch (Exception e)
{
return(SetPendingException(e));
}
}
// Pushes out and ref return values
for (int index = 0; index < _lastCalledMethod.outList.Length; index++)
{
nReturnValues++;
_translator.Push(luaState, _lastCalledMethod.args[_lastCalledMethod.outList[index]]);
}
// If not return void,we need add 1,
// or we will lost the function's return value
// when call dotnet function like "int foo(arg1,out arg2,out arg3)" in Lua code
if (!_lastCalledMethod.IsReturnVoid && nReturnValues > 0)
{
nReturnValues++;
}
return(nReturnValues < 1 ? 1 : nReturnValues);
}
