/// <summary>
/// Convert C# exceptions into Lua errors
/// </summary>
/// <returns>num of things on stack</returns>
/// <param name = "e">null for no pending exception</param>
internal int SetPendingException(Exception e)
{
var caughtExcept = e;
if (caughtExcept == null)
{
return(0);
}
try
{
_translator.ThrowError(_luaState, caughtExcept);
}
catch (Exception ex)
{
var err = ex.Message;
if (err == "Object reference not set to an instance of an object.")
{
throw new LuaException("脚本异常，请不要快速启动和关闭脚本");
}
else
{
throw new LuaException(err);
}
}
//_luaState.PushNil();
return(1);
}
/// <summary>
/// Convert C# exceptions into Lua errors
/// </summary>
/// <returns>num of things on stack</returns>
/// <param name = "e">null for no pending exception</param>
internal int SetPendingException(Exception e)
{
var caughtExcept = e;
if (caughtExcept == null)
{
return(0);
}
_translator.ThrowError(_luaState, caughtExcept);
return(1);
}
/// <summary>
/// Convert C# exceptions into Lua errors
/// </summary>
/// <returns>num of things on stack</returns>
/// <param name = "e">null for no pending exception</param>
internal int SetPendingException(Exception e)
{
var caughtExcept = e;
if (caughtExcept != null)
{
translator.ThrowError(luaState, caughtExcept);
LuaLib.LuaPushNil(luaState);
return(1);
}
else
{
return(0);
}
}
static int UnaryNegationLua (LuaState luaState, ObjectTranslator translator)
{
object obj1 = translator.GetRawNetObject (luaState, 1);
if (obj1 == null) {
translator.ThrowError (luaState, "Cannot negate a nil object");
LuaLib.LuaPushNil (luaState);
return 1;
}
Type type = obj1.GetType ();
MethodInfo opUnaryNegation = type.GetMethod ("op_UnaryNegation");
if (opUnaryNegation == null) {
translator.ThrowError (luaState, "Cannot negate object (" + type.Name + " does not overload the operator -)");
LuaLib.LuaPushNil (luaState);
return 1;
}
obj1 = opUnaryNegation.Invoke (obj1, new object [] { obj1 });
translator.Push (luaState, obj1);
return 1;
}
static int MatchOperator (LuaState luaState, string operation, ObjectTranslator translator)
{
var validOperator = new MethodCache ();
object target = GetTargetObject (luaState, operation, translator);
if (target == null) {
translator.ThrowError (luaState, "Cannot call " + operation + " on a nil object");
LuaLib.LuaPushNil (luaState);
return 1;
}
Type type = target.GetType ();
var operators = type.GetMethods (operation, BindingFlags.Public | BindingFlags.Instance | BindingFlags.Static);
foreach (var op in operators) {
bool isOk = translator.MatchParameters (luaState, op, ref validOperator);
if (!isOk)
continue;
object result;
if (op.IsStatic)
result = op.Invoke (null, validOperator.args);
else
result = op.Invoke (target, validOperator.args);
translator.Push (luaState, result);
return 1;
}
translator.ThrowError (luaState, "Cannot call (" + operation + ") on object type " + type.Name);
LuaLib.LuaPushNil (luaState);
return 1;
}
private int GetMethodInternal(LuaState luaState)
{
object obj = translator.GetRawNetObject(luaState, 1);
if (obj == null)
{
translator.ThrowError(luaState, "trying to index an invalid object reference");
LuaLib.LuaPushNil(luaState);
return(1);
}
object index = translator.GetObject(luaState, 2);
//var indexType = index.GetType();
string methodName = index as string; // will be null if not a string arg
var objType = obj.GetType();
// Handle the most common case, looking up the method by name.
// CP: This will fail when using indexers and attempting to get a value with the same name as a property of the object,
// ie: xmlelement['item'] <- item is a property of xmlelement
try {
if (!string.IsNullOrEmpty(methodName) && IsMemberPresent(objType, methodName))
{
return(GetMember(luaState, objType, obj, methodName, BindingFlags.Instance | BindingFlags.IgnoreCase));
}
} catch {
}
// Try to access by array if the type is right and index is an int (lua numbers always come across as double)
if (objType.IsArray && index is double)
{
int intIndex = (int)((double)index);
if (objType.UnderlyingSystemType == typeof(float[]))
{
float[] arr = ((float[])obj);
translator.Push(luaState, arr [intIndex]);
}
else if (objType.UnderlyingSystemType == typeof(double[]))
{
double[] arr = ((double[])obj);
translator.Push(luaState, arr [intIndex]);
}
else if (objType.UnderlyingSystemType == typeof(int[]))
{
int[] arr = ((int[])obj);
translator.Push(luaState, arr [intIndex]);
}
else
{
object[] arr = (object[])obj;
translator.Push(luaState, arr [intIndex]);
}
}
else
{
// Try to use get_Item to index into this .net object
var methods = objType.GetMethods();
foreach (var mInfo in methods)
{
if (mInfo.Name == "get_Item")
{
//check if the signature matches the input
if (mInfo.GetParameters().Length == 1)
{
var getter = mInfo;
var actualParms = (getter != null) ? getter.GetParameters() : null;
if (actualParms == null || actualParms.Length != 1)
{
translator.ThrowError(luaState, "method not found (or no indexer): " + index);
LuaLib.LuaPushNil(luaState);
}
else
{
// Get the index in a form acceptable to the getter
index = translator.GetAsType(luaState, 2, actualParms [0].ParameterType);
object[] args = new object[1];
// Just call the indexer - if out of bounds an exception will happen
args [0] = index;
try {
object result = getter.Invoke(obj, args);
translator.Push(luaState, result);
} catch (TargetInvocationException e) {
// Provide a more readable description for the common case of key not found
if (e.InnerException is KeyNotFoundException)
{
translator.ThrowError(luaState, "key '" + index + "' not found ");
}
else
{
translator.ThrowError(luaState, "exception indexing '" + index + "' " + e.Message);
}
LuaLib.LuaPushNil(luaState);
}
}
}
}
}
}
LuaLib.LuaPushBoolean(luaState, false);
return(2);
}
static int AddLua (LuaState luaState, ObjectTranslator translator)
{
object obj1 = translator.GetRawNetObject (luaState, 1);
object obj2 = translator.GetRawNetObject (luaState, 2);
if (obj1 == null || obj2 == null) {
translator.ThrowError (luaState, "Cannot add a nil object");
LuaLib.LuaPushNil (luaState);
return 1;
}
Type type = obj1.GetType ();
MethodInfo opAddition = type.GetMethod ("op_Addition");
if (opAddition == null) {
translator.ThrowError (luaState, "Cannot add object (" + type.Name+ " does not overload the operator +)");
LuaLib.LuaPushNil (luaState);
return 1;
}
obj1 = opAddition.Invoke (obj1, new object[] { obj1, obj2 });
translator.Push (luaState, obj1);
return 1;
}
