Exemplo n.º 1
0
        /*
         * Gets the CLR object in the index positon of the Lua stack. Returns
         * delegates as is.
         */
        internal object getRawNetObject(LuaCore.lua_State luaState, int index)
        {
            int udata = LuaLib.luanet_rawnetobj(luaState, index);

            return(udata != -1 ? objects[udata] : null);
        }
Exemplo n.º 2
0
 /*
  * Gets the function in the index positon of the Lua stack.
  */
 internal LuaFunction getFunction(LuaCore.lua_State luaState, int index)
 {
     LuaLib.lua_pushvalue(luaState, index);
     return(new LuaFunction(LuaLib.lua_ref(luaState, 1), interpreter));
 }
Exemplo n.º 3
0
        /*
         * Gets the CLR object in the index positon of the Lua stack. Returns
         * delegates as Lua functions.
         */
        internal object getNetObject(LuaCore.lua_State luaState, int index)
        {
            int idx = LuaLib.luanet_tonetobject(luaState, index);

            return(idx != -1 ? objects[idx] : null);
        }
Exemplo n.º 4
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 /*
  * Gets the table in the index positon of the Lua stack.
  */
 internal LuaTable getTable(LuaCore.lua_State luaState, int index)
 {
     LuaLib.lua_pushvalue(luaState, index);
     return(new LuaTable(LuaLib.lua_ref(luaState, 1), interpreter));
 }
Exemplo n.º 5
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 /*
  * Gets the userdata in the index positon of the Lua stack.
  */
 internal LuaUserData getUserData(LuaCore.lua_State luaState, int index)
 {
     LuaLib.lua_pushvalue(luaState, index);
     return(new LuaUserData(LuaLib.lua_ref(luaState, 1), interpreter));
 }
Exemplo n.º 6
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        /*
         * Matches a method against its arguments in the Lua stack. Returns
         * if the match was succesful. It it was also returns the information
         * necessary to invoke the method.
         */
        internal bool matchParameters(LuaCore.lua_State luaState, MethodBase method, ref MethodCache methodCache)
        {
            ExtractValue extractValue;
            bool         isMethod        = true;
            var          paramInfo       = method.GetParameters();
            int          currentLuaParam = 1;
            int          nLuaParams      = LuaLib.lua_gettop(luaState);
            var          paramList       = new ArrayList();
            var          outList         = new List <int>();
            var          argTypes        = new List <MethodArgs>();

            foreach (var currentNetParam in paramInfo)
            {
                if (!currentNetParam.IsIn && currentNetParam.IsOut)                 // Skips out params
                {
                    outList.Add(paramList.Add(null));
                }
                else if (currentLuaParam > nLuaParams)                // Adds optional parameters
                {
                    if (currentNetParam.IsOptional)
                    {
                        paramList.Add(currentNetParam.DefaultValue);
                    }
                    else
                    {
                        isMethod = false;
                        break;
                    }
                }
                else if (_IsTypeCorrect(luaState, currentLuaParam, currentNetParam, out extractValue))                 // Type checking
                {
                    int index     = paramList.Add(extractValue(luaState, currentLuaParam));
                    var methodArg = new MethodArgs();
                    methodArg.index        = index;
                    methodArg.extractValue = extractValue;
                    argTypes.Add(methodArg);

                    if (currentNetParam.ParameterType.IsByRef)
                    {
                        outList.Add(index);
                    }

                    currentLuaParam++;
                }                  // Type does not match, ignore if the parameter is optional
                else if (_IsParamsArray(luaState, currentLuaParam, currentNetParam, out extractValue))
                {
                    object luaParamValue  = extractValue(luaState, currentLuaParam);
                    var    paramArrayType = currentNetParam.ParameterType.GetElementType();
                    Array  paramArray;

                    if (luaParamValue is LuaTable)
                    {
                        var table           = (LuaTable)luaParamValue;
                        var tableEnumerator = table.GetEnumerator();
                        paramArray = Array.CreateInstance(paramArrayType, table.Values.Count);
                        tableEnumerator.Reset();
                        int paramArrayIndex = 0;

                        while (tableEnumerator.MoveNext())
                        {
                            paramArray.SetValue(Convert.ChangeType(tableEnumerator.Value, currentNetParam.ParameterType.GetElementType()), paramArrayIndex);
                            paramArrayIndex++;
                        }
                    }
                    else
                    {
                        paramArray = Array.CreateInstance(paramArrayType, 1);
                        paramArray.SetValue(luaParamValue, 0);
                    }

                    int index     = paramList.Add(paramArray);
                    var methodArg = new MethodArgs();
                    methodArg.index           = index;
                    methodArg.extractValue    = extractValue;
                    methodArg.isParamsArray   = true;
                    methodArg.paramsArrayType = paramArrayType;
                    argTypes.Add(methodArg);
                    currentLuaParam++;
                }
                else if (currentNetParam.IsOptional)
                {
                    paramList.Add(currentNetParam.DefaultValue);
                }
                else                  // No match
                {
                    isMethod = false;
                    break;
                }
            }

            if (currentLuaParam != nLuaParams + 1)            // Number of parameters does not match
            {
                isMethod = false;
            }
            if (isMethod)
            {
                methodCache.args         = paramList.ToArray();
                methodCache.cachedMethod = method;
                methodCache.outList      = outList.ToArray();
                methodCache.argTypes     = argTypes.ToArray();
            }

            return(isMethod);
        }
Exemplo n.º 7
0
 /*
  * __call metafunction of CLR delegates, retrieves and calls the delegate.
  */
 private int runFunctionDelegate(LuaCore.lua_State luaState)
 {
     LuaCore.lua_CFunction func = (LuaCore.lua_CFunction)translator.getRawNetObject(luaState, 1);
     LuaLib.lua_remove(luaState, 1);
     return(func(luaState));
 }
Exemplo n.º 8
0
        /*
         * __newindex metafunction of CLR objects. Receives the object,
         * the member name and the value to be stored as arguments. Throws
         * and error if the assignment is invalid.
         */
        private int setFieldOrProperty(LuaCore.lua_State luaState)
        {
            object target = translator.getRawNetObject(luaState, 1);

            if (target.IsNull())
            {
                translator.throwError(luaState, "trying to index and invalid object reference");
                return(0);
            }

            var type = target.GetType();

            // First try to look up the parameter as a property name
            string detailMessage;
            bool   didMember = trySetMember(luaState, type, target, BindingFlags.Instance | BindingFlags.IgnoreCase, out detailMessage);

            if (didMember)
            {
                return(0);                         // Must have found the property name
            }
            // We didn't find a property name, now see if we can use a [] style this accessor to set array contents
            try
            {
                if (type.IsArray && LuaLib.lua_isnumber(luaState, 2))
                {
                    int    index = (int)LuaLib.lua_tonumber(luaState, 2);
                    var    arr   = (Array)target;
                    object val   = translator.getAsType(luaState, 3, arr.GetType().GetElementType());
                    arr.SetValue(val, index);
                }
                else
                {
                    // Try to see if we have a this[] accessor
                    var setter = type.GetMethod("set_Item");
                    if (!setter.IsNull())
                    {
                        var args      = setter.GetParameters();
                        var valueType = args[1].ParameterType;

                        // The new val ue the user specified
                        object val       = translator.getAsType(luaState, 3, valueType);
                        var    indexType = args[0].ParameterType;
                        object index     = translator.getAsType(luaState, 2, indexType);

                        object[] methodArgs = new object[2];

                        // Just call the indexer - if out of bounds an exception will happen
                        methodArgs[0] = index;
                        methodArgs[1] = val;
                        setter.Invoke(target, methodArgs);
                    }
                    else
                    {
                        translator.throwError(luaState, detailMessage);                         // Pass the original message from trySetMember because it is probably best
                    }
                }
            }
            catch (SEHException)
            {
                // If we are seeing a C++ exception - this must actually be for Lua's private use.  Let it handle it
                throw;
            }
            catch (Exception e)
            {
                ThrowError(luaState, e);
            }

            return(0);
        }
Exemplo n.º 9
0
        /// <summary>
        /// Tries to set a named property or field
        /// </summary>
        /// <param name="luaState"></param>
        /// <param name="targetType"></param>
        /// <param name="target"></param>
        /// <param name="bindingType"></param>
        /// <returns>false if unable to find the named member, true for success</returns>
        private bool trySetMember(LuaCore.lua_State luaState, IReflect targetType, object target, BindingFlags bindingType, out string detailMessage)
        {
            detailMessage = null;               // No error yet

            // If not already a string just return - we don't want to call tostring - which has the side effect of
            // changing the lua typecode to string
            // Note: We don't use isstring because the standard lua C isstring considers either strings or numbers to
            // be true for isstring.
            if (LuaLib.lua_type(luaState, 2) != LuaTypes.String)
            {
                detailMessage = "property names must be strings";
                return(false);
            }

            // We only look up property names by string
            string fieldName = LuaLib.lua_tostring(luaState, 2).ToString();

            if (fieldName.IsNull() || fieldName.Length < 1 || !(char.IsLetter(fieldName[0]) || fieldName[0] == '_'))
            {
                detailMessage = "invalid property name";
                return(false);
            }

            // Find our member via reflection or the cache
            var member = (MemberInfo)checkMemberCache(memberCache, targetType, fieldName);

            if (member.IsNull())
            {
                //CP: Removed NonPublic binding search and made case insensitive
                var members = targetType.GetMember(fieldName, bindingType | BindingFlags.Public | BindingFlags.IgnoreCase /*| BindingFlags.NonPublic*/);

                if (members.Length > 0)
                {
                    member = members[0];
                    setMemberCache(memberCache, targetType, fieldName, member);
                }
                else
                {
                    detailMessage = "field or property '" + fieldName + "' does not exist";
                    return(false);
                }
            }

            if (member.MemberType == MemberTypes.Field)
            {
                var    field = (FieldInfo)member;
                object val   = translator.getAsType(luaState, 3, field.FieldType);

                try
                {
                    field.SetValue(target, val);
                }
                catch (Exception e)
                {
                    ThrowError(luaState, e);
                }

                // We did a call
                return(true);
            }
            else if (member.MemberType == MemberTypes.Property)
            {
                var    property = (PropertyInfo)member;
                object val      = translator.getAsType(luaState, 3, property.PropertyType);

                try
                {
                    property.SetValue(target, val, null);
                }
                catch (Exception e)
                {
                    ThrowError(luaState, e);
                }

                // We did a call
                return(true);
            }

            detailMessage = "'" + fieldName + "' is not a .net field or property";
            return(false);
        }
Exemplo n.º 10
0
        /*
         * Called by the __index metafunction of CLR objects in case the
         * method is not cached or it is a field/property/event.
         * Receives the object and the member name as arguments and returns
         * either the value of the member or a delegate to call it.
         * If the member does not exist returns nil.
         */
        private int getMethod(LuaCore.lua_State luaState)
        {
            object obj = translator.getRawNetObject(luaState, 1);

            if (obj.IsNull())
            {
                translator.throwError(luaState, "trying to index an invalid object reference");
                LuaLib.lua_pushnil(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 (!methodName.IsNull() && 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
                //MethodInfo getter = objType.GetMethod("get_Item");
                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.IsNull()) ? getter.GetParameters() : null;

                            if (actualParms.IsNull() || actualParms.Length != 1)
                            {
                                translator.throwError(luaState, "method not found (or no indexer): " + index);
                                LuaLib.lua_pushnil(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.lua_pushnil(luaState);
                                }
                            }
                        }
                    }
                }
            }

            LuaLib.lua_pushboolean(luaState, false);
            return(2);
        }
Exemplo n.º 11
0
        /*
         * Pushes the value of a member or a delegate to call it, depending on the type of
         * the member. Works with static or instance members.
         * Uses reflection to find members, and stores the reflected MemberInfo object in
         * a cache (indexed by the type of the object and the name of the member).
         */
        private int getMember(LuaCore.lua_State luaState, IReflect objType, object obj, string methodName, BindingFlags bindingType)
        {
            bool       implicitStatic = false;
            MemberInfo member         = null;
            object     cachedMember   = checkMemberCache(memberCache, objType, methodName);

            //object cachedMember=null;

            if (cachedMember is LuaCore.lua_CFunction)
            {
                translator.pushFunction(luaState, (LuaCore.lua_CFunction)cachedMember);
                translator.push(luaState, true);
                return(2);
            }
            else if (!cachedMember.IsNull())
            {
                member = (MemberInfo)cachedMember;
            }
            else
            {
                //CP: Removed NonPublic binding search
                var members = objType.GetMember(methodName, bindingType | BindingFlags.Public | BindingFlags.IgnoreCase /*| BindingFlags.NonPublic*/);

                if (members.Length > 0)
                {
                    member = members[0];
                }
                else
                {
                    // If we can't find any suitable instance members, try to find them as statics - but we only want to allow implicit static
                    // lookups for fields/properties/events -kevinh
                    //CP: Removed NonPublic binding search and made case insensitive
                    members = objType.GetMember(methodName, bindingType | BindingFlags.Static | BindingFlags.Public | BindingFlags.IgnoreCase /*| BindingFlags.NonPublic*/);

                    if (members.Length > 0)
                    {
                        member         = members[0];
                        implicitStatic = true;
                    }
                }
            }

            if (!member.IsNull())
            {
                if (member.MemberType == MemberTypes.Field)
                {
                    var field = (FieldInfo)member;

                    if (cachedMember.IsNull())
                    {
                        setMemberCache(memberCache, objType, methodName, member);
                    }

                    try
                    {
                        translator.push(luaState, field.GetValue(obj));
                    }
                    catch
                    {
                        LuaLib.lua_pushnil(luaState);
                    }
                }
                else if (member.MemberType == MemberTypes.Property)
                {
                    var property = (PropertyInfo)member;
                    if (cachedMember.IsNull())
                    {
                        setMemberCache(memberCache, objType, methodName, member);
                    }

                    try
                    {
                        object val = property.GetValue(obj, null);
                        translator.push(luaState, val);
                    }
                    catch (ArgumentException)
                    {
                        // If we can't find the getter in our class, recurse up to the base class and see
                        // if they can help.
                        if (objType is Type && !(((Type)objType) == typeof(object)))
                        {
                            return(getMember(luaState, ((Type)objType).BaseType, obj, methodName, bindingType));
                        }
                        else
                        {
                            LuaLib.lua_pushnil(luaState);
                        }
                    }
                    catch (TargetInvocationException e)                     // Convert this exception into a Lua error
                    {
                        ThrowError(luaState, e);
                        LuaLib.lua_pushnil(luaState);
                    }
                }
                else if (member.MemberType == MemberTypes.Event)
                {
                    var eventInfo = (EventInfo)member;
                    if (cachedMember.IsNull())
                    {
                        setMemberCache(memberCache, objType, methodName, member);
                    }

                    translator.push(luaState, new RegisterEventHandler(translator.pendingEvents, obj, eventInfo));
                }
                else if (!implicitStatic)
                {
                    if (member.MemberType == MemberTypes.NestedType)
                    {
                        // kevinh - added support for finding nested types
                        // cache us
                        if (cachedMember.IsNull())
                        {
                            setMemberCache(memberCache, objType, methodName, member);
                        }

                        // Find the name of our class
                        string name    = member.Name;
                        var    dectype = member.DeclaringType;

                        // Build a new long name and try to find the type by name
                        string longname   = dectype.FullName + "+" + name;
                        var    nestedType = translator.FindType(longname);
                        translator.pushType(luaState, nestedType);
                    }
                    else
                    {
                        // Member type must be 'method'
                        var wrapper = new LuaCore.lua_CFunction((new LuaMethodWrapper(translator, objType, methodName, bindingType)).call);

                        if (cachedMember.IsNull())
                        {
                            setMemberCache(memberCache, objType, methodName, wrapper);
                        }

                        translator.pushFunction(luaState, wrapper);
                        translator.push(luaState, true);
                        return(2);
                    }
                }
                else
                {
                    // If we reach this point we found a static method, but can't use it in this context because the user passed in an instance
                    translator.throwError(luaState, "can't pass instance to static method " + methodName);
                    LuaLib.lua_pushnil(luaState);
                }
            }
            else
            {
                // kevinh - we want to throw an exception because meerly returning 'nil' in this case
                // is not sufficient.  valid data members may return nil and therefore there must be some
                // way to know the member just doesn't exist.
                translator.throwError(luaState, "unknown member name " + methodName);
                LuaLib.lua_pushnil(luaState);
            }

            // push false because we are NOT returning a function (see luaIndexFunction)
            translator.push(luaState, false);
            return(2);
        }
Exemplo n.º 12
0
        internal ExtractValue checkType(LuaCore.lua_State luaState, int stackPos, Type paramType)
        {
            var luatype = LuaLib.lua_type(luaState, stackPos);

            if (paramType.IsByRef)
            {
                paramType = paramType.GetElementType();
            }

            var underlyingType = Nullable.GetUnderlyingType(paramType);

            if (!underlyingType.IsNull())
            {
                paramType = underlyingType;                      // Silently convert nullable types to their non null requics
            }
            long runtimeHandleValue = paramType.TypeHandle.Value.ToInt64();

            if (paramType.Equals(typeof(object)))
            {
                return(extractValues[runtimeHandleValue]);
            }

            //CP: Added support for generic parameters
            if (paramType.IsGenericParameter)
            {
                if (luatype == LuaTypes.Boolean)
                {
                    return(extractValues[typeof(bool).TypeHandle.Value.ToInt64()]);
                }
                else if (luatype == LuaTypes.String)
                {
                    return(extractValues[typeof(string).TypeHandle.Value.ToInt64()]);
                }
                else if (luatype == LuaTypes.Table)
                {
                    return(extractValues[typeof(LuaTable).TypeHandle.Value.ToInt64()]);
                }
                else if (luatype == LuaTypes.UserData)
                {
                    return(extractValues[typeof(object).TypeHandle.Value.ToInt64()]);
                }
                else if (luatype == LuaTypes.Function)
                {
                    return(extractValues[typeof(LuaFunction).TypeHandle.Value.ToInt64()]);
                }
                else if (luatype == LuaTypes.Number)
                {
                    return(extractValues[typeof(double).TypeHandle.Value.ToInt64()]);
                }
                //else
                //;//an unsupported type was encountered
            }

            if (LuaLib.lua_isnumber(luaState, stackPos))
            {
                return(extractValues[runtimeHandleValue]);
            }

            if (paramType == typeof(bool))
            {
                if (LuaLib.lua_isboolean(luaState, stackPos))
                {
                    return(extractValues[runtimeHandleValue]);
                }
            }
            else if (paramType == typeof(string))
            {
                if (LuaLib.lua_isstring(luaState, stackPos))
                {
                    return(extractValues[runtimeHandleValue]);
                }
                else if (luatype == LuaTypes.Nil)
                {
                    return(extractNetObject);                    // kevinh - silently convert nil to a null string pointer
                }
            }
            else if (paramType == typeof(LuaTable))
            {
                if (luatype == LuaTypes.Table)
                {
                    return(extractValues[runtimeHandleValue]);
                }
            }
            else if (paramType == typeof(LuaUserData))
            {
                if (luatype == LuaTypes.UserData)
                {
                    return(extractValues[runtimeHandleValue]);
                }
            }
            else if (paramType == typeof(LuaFunction))
            {
                if (luatype == LuaTypes.Function)
                {
                    return(extractValues[runtimeHandleValue]);
                }
            }
            else if (typeof(Delegate).IsAssignableFrom(paramType) && luatype == LuaTypes.Function)
            {
                return(new ExtractValue(new DelegateGenerator(translator, paramType).extractGenerated));
            }
            else if (paramType.IsInterface && luatype == LuaTypes.Table)
            {
                return(new ExtractValue(new ClassGenerator(translator, paramType).extractGenerated));
            }
            else if ((paramType.IsInterface || paramType.IsClass) && luatype == LuaTypes.Nil)
            {
                // kevinh - allow nil to be silently converted to null - extractNetObject will return null when the item ain't found
                return(extractNetObject);
            }
            else if (LuaLib.lua_type(luaState, stackPos) == LuaTypes.Table)
            {
                if (LuaLib.luaL_getmetafield(luaState, stackPos, "__index"))
                {
                    object obj = translator.getNetObject(luaState, -1);
                    LuaLib.lua_settop(luaState, -2);
                    if (!obj.IsNull() && paramType.IsAssignableFrom(obj.GetType()))
                    {
                        return(extractNetObject);
                    }
                }
                else
                {
                    return(null);
                }
            }
            else
            {
                object obj = translator.getNetObject(luaState, stackPos);
                if (!obj.IsNull() && paramType.IsAssignableFrom(obj.GetType()))
                {
                    return(extractNetObject);
                }
            }

            return(null);
        }
Exemplo n.º 13
0
 private object getAsBoolean(LuaCore.lua_State luaState, int stackPos)
 {
     return(LuaLib.lua_toboolean(luaState, stackPos));
 }
Exemplo n.º 14
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        static int PanicCallback(LuaCore.lua_State luaState)
        {
            // string desc = LuaLib.lua_tostring(luaState, 1);
            string reason = string.Format("unprotected error in call to Lua API ({0})", LuaLib.lua_tostring(luaState, -1));

            //		lua_tostring(L, -1);
            throw new LuaException(reason);
        }
Exemplo n.º 15
0
        /// <summary>
        /// Pops a value from the lua stack.
        /// </summary>
        /// <returns>Returns the top value from the lua stack.</returns>
        /// <author>Reinhard Ostermeier</author>
        public object Pop()
        {
            int top = LuaLib.lua_gettop(luaState);

            return(translator.popValues(luaState, top - 1)[0]);
        }
Exemplo n.º 16
0
 /*
  * Pushes the userdata into the Lua stack
  */
 internal void push(LuaCore.lua_State luaState)
 {
     LuaLib.lua_getref(luaState, _Reference);
 }