554 lines
16 KiB
C++
554 lines
16 KiB
C++
// Copyright (C) 2015 Jérôme Leclercq
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// This file is part of the "Nazara Engine - Lua scripting module"
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// For conditions of distribution and use, see copyright notice in Config.hpp
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#include <Nazara/Core/Algorithm.hpp>
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#include <string>
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#include <type_traits>
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namespace Nz
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{
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// Functions args
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inline unsigned int LuaImplQueryArg(const LuaInstance& instance, int index, bool* arg, TypeTag<bool>)
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{
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*arg = instance.CheckBoolean(index);
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return 1;
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}
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inline unsigned int LuaImplQueryArg(const LuaInstance& instance, int index, bool* arg, bool defValue, TypeTag<bool>)
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{
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*arg = instance.CheckBoolean(index, defValue);
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return 1;
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}
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inline unsigned int LuaImplQueryArg(const LuaInstance& instance, int index, std::string* arg, TypeTag<std::string>)
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{
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std::size_t strLength = 0;
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const char* str = instance.CheckString(index, &strLength);
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arg->assign(str, strLength);
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return 1;
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}
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inline unsigned int LuaImplQueryArg(const LuaInstance& instance, int index, String* arg, TypeTag<String>)
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{
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std::size_t strLength = 0;
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const char* str = instance.CheckString(index, &strLength);
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arg->Set(str, strLength);
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return 1;
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}
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template<typename T>
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std::enable_if_t<std::is_enum<T>::value, unsigned int> LuaImplQueryArg(const LuaInstance& instance, int index, T* arg, TypeTag<T>)
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{
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using UnderlyingT = std::underlying_type_t<T>;
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return LuaImplQueryArg(instance, index, reinterpret_cast<UnderlyingT*>(arg), TypeTag<UnderlyingT>());
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}
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template<typename T>
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std::enable_if_t<std::is_enum<T>::value, unsigned int> LuaImplQueryArg(const LuaInstance& instance, int index, T* arg, T defValue, TypeTag<T>)
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{
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using UnderlyingT = std::underlying_type_t<T>;
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return LuaImplQueryArg(instance, index, reinterpret_cast<UnderlyingT*>(arg), static_cast<UnderlyingT>(defValue), TypeTag<UnderlyingT>());
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}
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template<typename T>
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std::enable_if_t<std::is_floating_point<T>::value, unsigned int> LuaImplQueryArg(const LuaInstance& instance, int index, T* arg, TypeTag<T>)
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{
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*arg = static_cast<T>(instance.CheckNumber(index));
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return 1;
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}
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template<typename T>
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std::enable_if_t<std::is_floating_point<T>::value, unsigned int> LuaImplQueryArg(const LuaInstance& instance, int index, T* arg, T defValue, TypeTag<T>)
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{
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*arg = static_cast<T>(instance.CheckNumber(index, static_cast<double>(defValue)));
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return 1;
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}
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template<typename T>
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std::enable_if_t<std::is_integral<T>::value && !std::is_unsigned<T>::value, unsigned int> LuaImplQueryArg(const LuaInstance& instance, int index, T* arg, TypeTag<T>)
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{
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*arg = static_cast<T>(instance.CheckInteger(index));
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return 1;
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}
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template<typename T>
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std::enable_if_t<std::is_integral<T>::value && !std::is_unsigned<T>::value, unsigned int> LuaImplQueryArg(const LuaInstance& instance, int index, T* arg, T defValue, TypeTag<T>)
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{
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*arg = static_cast<T>(instance.CheckInteger(index, defValue));
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return 1;
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}
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template<typename T>
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std::enable_if_t<std::is_unsigned<T>::value, unsigned int> LuaImplQueryArg(const LuaInstance& instance, int index, T* arg, TypeTag<T>)
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{
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using SignedT = std::make_signed_t<T>;
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return LuaImplQueryArg(instance, index, reinterpret_cast<SignedT*>(arg), TypeTag<SignedT>());
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}
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template<typename T>
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std::enable_if_t<std::is_unsigned<T>::value, unsigned int> LuaImplQueryArg(const LuaInstance& instance, int index, T* arg, T defValue, TypeTag<T>)
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{
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using SignedT = std::make_signed_t<T>;
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return LuaImplQueryArg(instance, index, reinterpret_cast<SignedT*>(arg), static_cast<SignedT>(defValue), TypeTag<SignedT>());
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}
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template<typename T>
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std::enable_if_t<!std::is_integral<T>::value, unsigned int> LuaImplQueryArg(const LuaInstance& instance, int index, T* arg, const T& defValue, TypeTag<T> tag)
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{
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if (instance.IsValid(index))
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return LuaImplQueryArg(instance, index, arg, tag);
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else
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{
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*arg = defValue;
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return 1;
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}
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}
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template<typename T>
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unsigned int LuaImplQueryArg(const LuaInstance& instance, int index, T* arg, TypeTag<const T&>)
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{
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return LuaImplQueryArg(instance, index, arg, TypeTag<T>());
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}
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template<typename T>
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unsigned int LuaImplQueryArg(const LuaInstance& instance, int index, T* arg, const T& defValue, TypeTag<const T&>)
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{
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return LuaImplQueryArg(instance, index, arg, defValue, TypeTag<T>());
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}
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// Function returns
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inline int LuaImplReplyVal(const LuaInstance& instance, bool val, TypeTag<bool>)
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{
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instance.PushBoolean(val);
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return 1;
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}
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inline int LuaImplReplyVal(const LuaInstance& instance, double val, TypeTag<double>)
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{
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instance.PushNumber(val);
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return 1;
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}
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inline int LuaImplReplyVal(const LuaInstance& instance, float val, TypeTag<float>)
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{
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instance.PushNumber(val);
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return 1;
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}
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template<typename T>
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std::enable_if_t<std::is_enum<T>::value, int> LuaImplReplyVal(const LuaInstance& instance, T val, TypeTag<T>)
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{
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using EnumT = typename std::underlying_type<T>::type;
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return LuaImplReplyVal(instance, static_cast<EnumT>(val), TypeTag<EnumT>());
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}
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template<typename T>
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std::enable_if_t<std::is_integral<T>::value && !std::is_unsigned<T>::value, int> LuaImplReplyVal(const LuaInstance& instance, T val, TypeTag<T>)
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{
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instance.PushInteger(val);
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return 1;
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}
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template<typename T>
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std::enable_if_t<std::is_unsigned<T>::value, int> LuaImplReplyVal(const LuaInstance& instance, T val, TypeTag<T>)
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{
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using SignedT = typename std::make_signed<T>::type;
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return LuaImplReplyVal(instance, static_cast<SignedT>(val), TypeTag<SignedT>());
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}
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inline int LuaImplReplyVal(const LuaInstance& instance, std::string val, TypeTag<std::string>)
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{
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instance.PushString(val.c_str(), val.size());
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return 1;
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}
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inline int LuaImplReplyVal(const LuaInstance& instance, String val, TypeTag<String>)
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{
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instance.PushString(std::move(val));
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return 1;
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}
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template<typename T1, typename T2>
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int LuaImplReplyVal(const LuaInstance& instance, std::pair<T1, T2> val, TypeTag<std::pair<T1, T2>>)
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{
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int retVal = 0;
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retVal += LuaImplReplyVal(instance, std::move(val.first), TypeTag<T1>());
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retVal += LuaImplReplyVal(instance, std::move(val.second), TypeTag<T2>());
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return retVal;
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}
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template<bool HasDefault>
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struct LuaImplArgProcesser;
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template<>
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struct LuaImplArgProcesser<true>
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{
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template<std::size_t N, std::size_t FirstDefArg, typename ArgType, typename ArgContainer, typename DefArgContainer>
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static unsigned int Process(const LuaInstance& instance, unsigned int argIndex, ArgContainer& args, DefArgContainer& defArgs)
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{
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return LuaImplQueryArg(instance, argIndex, &std::get<N>(args), std::get<std::tuple_size<DefArgContainer>() - N + FirstDefArg - 1>(defArgs), TypeTag<ArgType>());
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}
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};
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template<>
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struct LuaImplArgProcesser<false>
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{
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template<std::size_t N, std::size_t FirstDefArg, typename ArgType, typename ArgContainer, typename DefArgContainer>
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static unsigned int Process(const LuaInstance& instance, unsigned int argIndex, ArgContainer& args, DefArgContainer& defArgs)
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{
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NazaraUnused(defArgs);
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return LuaImplQueryArg(instance, argIndex, &std::get<N>(args), TypeTag<ArgType>());
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}
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};
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template<typename... Args>
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class LuaImplFunctionProxy
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{
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public:
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template<typename... DefArgs>
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class Impl
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{
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static constexpr std::size_t ArgCount = sizeof...(Args);
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static constexpr std::size_t DefArgCount = sizeof...(DefArgs);
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static_assert(ArgCount >= DefArgCount, "There cannot be more default arguments than argument");
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static constexpr std::size_t FirstDefArg = ArgCount - DefArgCount;
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public:
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Impl(DefArgs... defArgs) :
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m_defaultArgs(std::forward<DefArgs>(defArgs)...)
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{
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}
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void ProcessArgs(const LuaInstance& instance) const
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{
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m_index = 1;
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ProcessArgs<0, Args...>(instance);
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}
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int Invoke(const LuaInstance& instance, void(*func)(Args...)) const
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{
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NazaraUnused(instance);
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Apply(func, m_args);
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return 0;
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}
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template<typename Ret>
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int Invoke(const LuaInstance& instance, Ret(*func)(Args...)) const
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{
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return LuaImplReplyVal(instance, std::move(Apply(func, m_args)), TypeTag<decltype(Apply(func, m_args))>());
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}
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private:
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using ArgContainer = std::tuple<std::remove_cv_t<std::remove_reference_t<Args>>...>;
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using DefArgContainer = std::tuple<std::remove_cv_t<std::remove_reference_t<DefArgs>>...>;
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template<std::size_t N>
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void ProcessArgs(const LuaInstance& instance) const
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{
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NazaraUnused(instance);
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// No argument to process
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}
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template<std::size_t N, typename ArgType>
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void ProcessArgs(const LuaInstance& instance) const
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{
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LuaImplArgProcesser<(N >= FirstDefArg)>::template Process<N, FirstDefArg, ArgType>(instance, m_index, m_args, m_defaultArgs);
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}
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template<std::size_t N, typename ArgType1, typename ArgType2, typename... Rest>
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void ProcessArgs(const LuaInstance& instance) const
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{
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ProcessArgs<N, ArgType1>(instance);
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ProcessArgs<N + 1, ArgType2, Rest...>(instance);
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}
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mutable ArgContainer m_args;
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DefArgContainer m_defaultArgs;
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mutable unsigned int m_index;
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};
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};
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template<typename... Args>
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class LuaImplMethodProxy
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{
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public:
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template<typename... DefArgs>
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class Impl
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{
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static constexpr std::size_t ArgCount = sizeof...(Args);
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static constexpr std::size_t DefArgCount = sizeof...(DefArgs);
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static_assert(ArgCount >= DefArgCount, "There cannot be more default arguments than argument");
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static constexpr std::size_t FirstDefArg = ArgCount - DefArgCount;
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public:
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Impl(DefArgs... defArgs) :
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m_defaultArgs(std::forward<DefArgs>(defArgs)...)
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{
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}
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void ProcessArgs(const LuaInstance& instance) const
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{
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m_index = 1;
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ProcessArgs<0, Args...>(instance);
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}
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template<typename T, typename P>
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std::enable_if_t<std::is_base_of<P, T>::value, int> Invoke(const LuaInstance& instance, T& object, void(P::*func)(Args...)) const
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{
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NazaraUnused(instance);
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Apply(object, func, m_args);
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return 0;
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}
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template<typename T, typename P, typename Ret>
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std::enable_if_t<std::is_base_of<P, T>::value, int> Invoke(const LuaInstance& instance, T& object, Ret(P::*func)(Args...)) const
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{
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return LuaImplReplyVal(instance, std::move(Apply(object, func, m_args)), TypeTag<decltype(Apply(object, func, m_args))>());
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}
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template<typename T, typename P>
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std::enable_if_t<std::is_base_of<P, T>::value, int> Invoke(const LuaInstance& instance, const T& object, void(P::*func)(Args...) const) const
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{
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NazaraUnused(instance);
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Apply(object, func, m_args);
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return 0;
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}
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template<typename T, typename P, typename Ret>
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std::enable_if_t<std::is_base_of<P, T>::value, int> Invoke(const LuaInstance& instance, const T& object, Ret(P::*func)(Args...) const) const
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{
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return LuaImplReplyVal(instance, std::move(Apply(object, func, m_args)), TypeTag<decltype(Apply(object, func, m_args))>());
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}
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template<typename T, typename P>
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std::enable_if_t<std::is_base_of<P, typename PointedType<T>::type>::value, int> Invoke(const LuaInstance& instance, T& object, void(P::*func)(Args...)) const
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{
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NazaraUnused(instance);
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Apply(*object, func, m_args);
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return 0;
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}
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template<typename T, typename P, typename Ret>
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std::enable_if_t<std::is_base_of<P, typename PointedType<T>::type>::value, int> Invoke(const LuaInstance& instance, T& object, Ret(P::*func)(Args...)) const
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{
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return LuaImplReplyVal(instance, std::move(Apply(*object, func, m_args)), TypeTag<decltype(Apply(*object, func, m_args))>());
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}
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template<typename T, typename P>
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std::enable_if_t<std::is_base_of<P, typename PointedType<T>::type>::value, int> Invoke(const LuaInstance& instance, const T& object, void(P::*func)(Args...) const) const
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{
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NazaraUnused(instance);
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Apply(*object, func, m_args);
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return 0;
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}
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template<typename T, typename P, typename Ret>
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std::enable_if_t<std::is_base_of<P, typename PointedType<T>::type>::value, int> Invoke(const LuaInstance& instance, const T& object, Ret(P::*func)(Args...) const) const
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{
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return LuaImplReplyVal(instance, std::move(Apply(*object, func, m_args)), TypeTag<decltype(Apply(*object, func, m_args))>());
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}
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private:
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using ArgContainer = std::tuple<std::remove_cv_t<std::remove_reference_t<Args>>...>;
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using DefArgContainer = std::tuple<std::remove_cv_t<std::remove_reference_t<DefArgs>>...>;
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template<std::size_t N>
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void ProcessArgs(const LuaInstance& instance) const
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{
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NazaraUnused(instance);
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// No argument to process
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}
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template<std::size_t N, typename ArgType>
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void ProcessArgs(const LuaInstance& instance) const
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{
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m_index += LuaImplArgProcesser<(N >= FirstDefArg)>::template Process<N, FirstDefArg, ArgType>(instance, m_index, m_args, m_defaultArgs);
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}
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template<std::size_t N, typename ArgType1, typename ArgType2, typename... Rest>
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void ProcessArgs(const LuaInstance& instance) const
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{
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ProcessArgs<N, ArgType1>(instance);
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ProcessArgs<N + 1, ArgType2, Rest...>(instance);
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}
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mutable ArgContainer m_args;
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DefArgContainer m_defaultArgs;
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mutable unsigned int m_index;
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};
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};
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template<typename T>
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T LuaInstance::Check(int* index) const
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{
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NazaraAssert(index, "Invalid index pointer");
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T object;
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*index += LuaImplQueryArg(*this, *index, &object, TypeTag<T>());
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return object;
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}
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template<typename T>
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T LuaInstance::Check(int* index, T defValue) const
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{
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NazaraAssert(index, "Invalid index pointer");
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T object;
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*index += LuaImplQueryArg(*this, *index, &object, defValue, TypeTag<T>());
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return object;
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}
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template<typename T>
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T LuaInstance::CheckField(const char* fieldName, int tableIndex) const
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{
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T object;
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GetField(fieldName, tableIndex);
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tableIndex += LuaImplQueryArg(*this, -1, &object, TypeTag<T>());
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Pop();
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return object;
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}
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template<typename T>
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T LuaInstance::CheckField(const String& fieldName, int tableIndex) const
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{
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return CheckField<T>(fieldName.GetConstBuffer(), tableIndex);
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}
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template<typename T>
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T LuaInstance::CheckField(const char* fieldName, T defValue, int tableIndex) const
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{
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T object;
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GetField(fieldName, tableIndex);
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tableIndex += LuaImplQueryArg(*this, -1, &object, defValue, TypeTag<T>());
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Pop();
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return object;
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}
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template<typename T>
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T LuaInstance::CheckField(const String& fieldName, T defValue, int tableIndex) const
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{
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return CheckField<T>(fieldName.GetConstBuffer(), defValue, tableIndex);
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}
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template<typename T>
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T LuaInstance::CheckGlobal(const char* fieldName) const
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{
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T object;
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GetGlobal(fieldName);
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LuaImplQueryArg(*this, -1, &object, TypeTag<T>());
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Pop();
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return object;
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}
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template<typename T>
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T LuaInstance::CheckGlobal(const String& fieldName) const
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{
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return CheckGlobal<T>(fieldName.GetConstBuffer());
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}
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template<typename T>
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T LuaInstance::CheckGlobal(const char* fieldName, T defValue) const
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{
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T object;
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GetGlobal(fieldName);
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LuaImplQueryArg(*this, -1, &object, defValue, TypeTag<T>());
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Pop();
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return object;
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}
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template<typename T>
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T LuaInstance::CheckGlobal(const String& fieldName, T defValue) const
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{
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return CheckGlobal<T>(fieldName.GetConstBuffer(), defValue);
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}
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template<typename T>
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int LuaInstance::Push(T arg) const
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{
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return LuaImplReplyVal(*this, std::move(arg), TypeTag<T>());
|
|
}
|
|
|
|
template<typename R, typename... Args, typename... DefArgs>
|
|
void LuaInstance::PushFunction(R(*func)(Args...), DefArgs&&... defArgs) const
|
|
{
|
|
typename LuaImplFunctionProxy<Args...>::template Impl<DefArgs...> handler(std::forward<DefArgs>(defArgs)...);
|
|
|
|
PushFunction([func, handler] (LuaInstance& lua) -> int
|
|
{
|
|
handler.ProcessArgs(lua);
|
|
|
|
return handler.Invoke(lua, func);
|
|
});
|
|
}
|
|
|
|
template<typename T>
|
|
void LuaInstance::PushInstance(const char* tname, T* instance) const
|
|
{
|
|
T** userdata = static_cast<T**>(PushUserdata(sizeof(T*)));
|
|
*userdata = instance;
|
|
SetMetatable(tname);
|
|
}
|
|
|
|
template<typename T, typename... Args>
|
|
void LuaInstance::PushInstance(const char* tname, Args&&... args) const
|
|
{
|
|
PushInstance(tname, new T(std::forward<Args>(args)...));
|
|
}
|
|
|
|
template<typename T>
|
|
void LuaInstance::SetField(const char* name, T&& arg, int tableIndex)
|
|
{
|
|
Push<T>(std::forward<T>(arg));
|
|
SetField(name, tableIndex);
|
|
}
|
|
|
|
template<typename T>
|
|
void LuaInstance::SetField(const String& name, T&& arg, int tableIndex)
|
|
{
|
|
SetField(name.GetConstBuffer(), std::forward<T>(arg), tableIndex);
|
|
}
|
|
|
|
template<typename T>
|
|
void LuaInstance::SetGlobal(const char* name, T&& arg)
|
|
{
|
|
Push<T>(std::forward<T>(arg));
|
|
SetGlobal(name);
|
|
}
|
|
|
|
template<typename T>
|
|
void LuaInstance::SetGlobal(const String& name, T&& arg)
|
|
{
|
|
SetGlobal(name.GetConstBuffer(), std::forward<T>(arg));
|
|
}
|
|
}
|