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286 lines
9.4 KiB
286 lines
9.4 KiB
/*
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* Copyright (c) 2010-2012 OTClient <https://github.com/edubart/otclient>
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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* THE SOFTWARE.
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*/
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#ifndef LUAVALUECASTS_H
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#define LUAVALUECASTS_H
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// this file is and must be included only from luainterface.h
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#include "declarations.h"
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#include <framework/otml/declarations.h>
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// bool
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void push_luavalue(bool b);
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bool luavalue_cast(int index, bool& b);
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// int
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void push_luavalue(int i);
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bool luavalue_cast(int index, int& i);
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// double
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void push_luavalue(double d);
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bool luavalue_cast(int index, double& d);
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// float
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inline void push_luavalue(float f) { push_luavalue((double)f); }
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inline bool luavalue_cast(int index, float& f) { double d; bool r = luavalue_cast(index, d); f = d; return r; }
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// int8
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inline void push_luavalue(int8 v) { push_luavalue((int)v); }
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inline bool luavalue_cast(int index, int8& v) { int i; bool r = luavalue_cast(index, i); v = i; return r; }
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// uint8
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inline void push_luavalue(uint8 v) { push_luavalue((int)v); }
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inline bool luavalue_cast(int index, uint8& v){ int i; bool r = luavalue_cast(index, i); v = i; return r; }
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// int16
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inline void push_luavalue(int16 v) { push_luavalue((int)v); }
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inline bool luavalue_cast(int index, int16& v){ int i; bool r = luavalue_cast(index, i); v = i; return r; }
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// uint16
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inline void push_luavalue(uint16 v) { push_luavalue((int)v); }
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inline bool luavalue_cast(int index, uint16& v){ int i; bool r = luavalue_cast(index, i); v = i; return r; }
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// uint32
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inline void push_luavalue(uint32 v) { push_luavalue((double)v); }
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inline bool luavalue_cast(int index, uint32& v) { double d; bool r = luavalue_cast(index, d); v = d; return r; }
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// int64
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inline void push_luavalue(int64 v) { push_luavalue((double)v); }
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inline bool luavalue_cast(int index, int64& v) { double d; bool r = luavalue_cast(index, d); v = d; return r; }
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// uint64
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inline void push_luavalue(uint64 v) { push_luavalue((double)v); }
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inline bool luavalue_cast(int index, uint64& v) { double d; bool r = luavalue_cast(index, d); v = d; return r; }
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// string
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void push_luavalue(const char* cstr);
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void push_luavalue(const std::string& str);
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bool luavalue_cast(int index, std::string& str);
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// lua cpp function
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void push_luavalue(const LuaCppFunction& func);
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// color
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void push_luavalue(const Color& color);
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bool luavalue_cast(int index, Color& color);
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// rect
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void push_luavalue(const Rect& rect);
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bool luavalue_cast(int index, Rect& rect);
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// point
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void push_luavalue(const Point& point);
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bool luavalue_cast(int index, Point& point);
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// size
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void push_luavalue(const Size& size);
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bool luavalue_cast(int index, Size& size);
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// otml nodes
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void push_luavalue(const OTMLNodePtr& node);
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bool luavalue_cast(int index, OTMLNodePtr& node);
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// enum
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template<class T>
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typename std::enable_if<std::is_enum<T>::value, bool>::type
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luavalue_cast(int index, T& myenum);
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// LuaObject pointers
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template<class T>
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typename std::enable_if<std::is_base_of<LuaObject, typename T::element_type>::value, void>::type
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push_luavalue(const T& obj);
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bool luavalue_cast(int index, LuaObjectPtr& obj);
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template<class T>
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typename std::enable_if<std::is_base_of<LuaObject, T>::value, bool>::type
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luavalue_cast(int index, std::shared_ptr<T>& ptr);
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// std::function
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template<typename Ret, typename... Args>
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void push_luavalue(const std::function<Ret(Args...)>& func);
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template<typename... Args>
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bool luavalue_cast(int index, std::function<void(Args...)>& func);
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template<typename Ret, typename... Args>
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typename std::enable_if<!std::is_void<Ret>::value, bool>::type
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luavalue_cast(int index, std::function<Ret(Args...)>& func);
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// vector
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template<typename T>
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void push_luavalue(const std::vector<T>& vec);
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// deque
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template<class T>
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void push_luavalue(const std::deque<T>& vec);
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// tuple
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template<typename... Args>
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void push_luavalue(const std::tuple<Args...>& tuple);
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// start definitions
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#include "luaexception.h"
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#include "luainterface.h"
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template<class T>
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typename std::enable_if<std::is_enum<T>::value, bool>::type
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luavalue_cast(int index, T& myenum) {
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return luavalue_cast(index, (int&)myenum);
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}
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template<class T>
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typename std::enable_if<std::is_base_of<LuaObject, typename T::element_type>::value, void>::type
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push_luavalue(const T& obj) {
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if(obj)
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return g_lua.pushObject(obj);
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return g_lua.pushNil();
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}
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template<class T>
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typename std::enable_if<std::is_base_of<LuaObject, T>::value, bool>::type
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luavalue_cast(int index, std::shared_ptr<T>& ptr) {
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LuaObjectPtr obj;
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if(!luavalue_cast(index, obj))
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return false;
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ptr = std::dynamic_pointer_cast<T>(obj);
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return true;
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}
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template<typename Ret, typename... Args>
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void push_luavalue(const std::function<Ret(Args...)>& func) {
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if(func) {
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LuaCppFunction f = luabinder::bind_fun(func);
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g_lua.pushCppFunction(f);
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} else
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g_lua.pushNil();
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}
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template<typename... Args>
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bool luavalue_cast(int index, std::function<void(Args...)>& func) {
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if(g_lua.isFunction(index)) {
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g_lua.pushValue(index);
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// weak references are used here, this means that the script must hold another reference
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// to this function, otherwise it will expire
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int funcWeakRef = g_lua.weakRef();
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func = [=](Args... args) {
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// note that we must catch exceptions, because this lambda can be called from anywhere
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// and most of them won't catch exceptions (e.g. dispatcher)
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g_lua.getWeakRef(funcWeakRef);
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try {
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if(g_lua.isFunction()) {
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g_lua.polymorphicPush(args...);
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assert(g_lua.safeCall(sizeof...(Args)) == 0);
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} else {
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throw LuaException("attempt to call an expired lua function from C++,"
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"did you forget to hold a reference for that function?", 0);
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}
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} catch(LuaException& e) {
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logError("lua function callback failed: ", e.what());
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}
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};
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return true;
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} else if(g_lua.isNil(index)) {
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func = std::function<void(Args...)>();
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return true;
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}
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return false;
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}
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template<typename Ret, typename... Args>
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typename std::enable_if<!std::is_void<Ret>::value, bool>::type
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luavalue_cast(int index, std::function<Ret(Args...)>& func) {
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if(g_lua.isFunction(index)) {
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g_lua.pushValue(index);
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// weak references are used here, this means that the script must hold another reference
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// to this function, otherwise it will expire
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int funcWeakRef = g_lua.weakRef();
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func = [=](Args... args) -> Ret {
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// note that we must catch exceptions, because this lambda can be called from anywhere
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// and most of them won't catch exceptions (e.g. dispatcher)
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try {
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g_lua.getWeakRef(funcWeakRef);
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if(g_lua.isFunction()) {
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g_lua.polymorphicPush(args...);
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if(g_lua.safeCall(sizeof...(Args)) != 1)
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throw LuaException("a function from lua didn't retrieve the expected number of results", 0);
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return g_lua.polymorphicPop<Ret>();
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} else {
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throw LuaException("attempt to call an expired lua function from C++,"
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"did you forget to hold a reference for that function?", 0);
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}
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} catch(LuaException& e) {
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logError("lua function callback failed: ", e.what());
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}
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return Ret();
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};
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return true;
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} else if(g_lua.isNil(index)) {
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func = std::function<Ret(Args...)>();
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return true;
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}
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return false;
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}
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template<typename T>
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void push_luavalue(const std::vector<T>& vec) {
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g_lua.newTable();
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int i = 1;
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for(const T& v : vec) {
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push_luavalue(v);
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g_lua.rawSeti(i);
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i++;
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}
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}
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template<typename T>
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void push_luavalue(const std::deque<T>& vec) {
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g_lua.newTable();
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int i = 1;
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for(const T& v : vec) {
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push_luavalue(v);
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g_lua.rawSeti(i);
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i++;
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}
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}
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template<int N>
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struct push_tuple_luavalue {
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template<typename Tuple>
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static void call(const Tuple& tuple) {
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push_luavalue(std::get<N-1>(tuple));
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g_lua.rawSeti(N);
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push_tuple_luavalue<N-1>::call(tuple);
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}
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};
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template<>
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struct push_tuple_luavalue<0> {
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template<typename Tuple>
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static void call(const Tuple& tuple) { }
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};
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template<typename... Args>
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void push_luavalue(const std::tuple<Args...>& tuple) {
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g_lua.newTable();
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push_tuple_luavalue<sizeof...(Args)>::call(tuple);
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}
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#endif
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