mirror of
https://github.com/ThePhD/sol2.git
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208 lines
10 KiB
C++
208 lines
10 KiB
C++
// The MIT License (MIT)
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// Copyright (c) 2013-2017 Rapptz, ThePhD and contributors
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// Permission is hereby granted, free of charge, to any person obtaining a copy of
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// this software and associated documentation files (the "Software"), to deal in
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// the Software without restriction, including without limitation the rights to
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// use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
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// the Software, and to permit persons to whom the Software is furnished to do so,
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// subject to the following conditions:
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// The above copyright notice and this permission notice shall be included in all
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// copies or substantial portions of the Software.
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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, FITNESS
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// FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
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// COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
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// IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
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// CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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#ifndef SOL_STACK_HPP
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#define SOL_STACK_HPP
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#include "stack_core.hpp"
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#include "stack_reference.hpp"
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#include "stack_check.hpp"
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#include "stack_get.hpp"
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#include "stack_check_get.hpp"
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#include "stack_push.hpp"
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#include "stack_pop.hpp"
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#include "stack_field.hpp"
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#include "stack_probe.hpp"
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#include <cstring>
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#include <array>
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namespace sol {
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namespace stack {
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namespace stack_detail {
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template<typename T>
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inline int push_as_upvalues(lua_State* L, T& item) {
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typedef std::decay_t<T> TValue;
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const static std::size_t itemsize = sizeof(TValue);
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const static std::size_t voidsize = sizeof(void*);
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const static std::size_t voidsizem1 = voidsize - 1;
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const static std::size_t data_t_count = (sizeof(TValue) + voidsizem1) / voidsize;
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typedef std::array<void*, data_t_count> data_t;
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data_t data{ {} };
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std::memcpy(&data[0], std::addressof(item), itemsize);
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int pushcount = 0;
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for (auto&& v : data) {
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pushcount += push(L, lightuserdata_value(v));
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}
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return pushcount;
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}
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template<typename T>
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inline std::pair<T, int> get_as_upvalues(lua_State* L, int index = 2) {
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const static std::size_t data_t_count = (sizeof(T) + (sizeof(void*) - 1)) / sizeof(void*);
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typedef std::array<void*, data_t_count> data_t;
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data_t voiddata{ {} };
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for (std::size_t i = 0, d = 0; d < sizeof(T); ++i, d += sizeof(void*)) {
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voiddata[i] = get<lightuserdata_value>(L, upvalue_index(index++));
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}
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return std::pair<T, int>(*reinterpret_cast<T*>(static_cast<void*>(voiddata.data())), index);
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}
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struct evaluator {
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template <typename Fx, typename... Args>
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static decltype(auto) eval(types<>, std::index_sequence<>, lua_State*, int, record&, Fx&& fx, Args&&... args) {
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return std::forward<Fx>(fx)(std::forward<Args>(args)...);
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}
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template <typename Fx, typename Arg, typename... Args, std::size_t I, std::size_t... Is, typename... FxArgs>
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static decltype(auto) eval(types<Arg, Args...>, std::index_sequence<I, Is...>, lua_State* L, int start, record& tracking, Fx&& fx, FxArgs&&... fxargs) {
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return eval(types<Args...>(), std::index_sequence<Is...>(), L, start, tracking, std::forward<Fx>(fx), std::forward<FxArgs>(fxargs)..., stack_detail::unchecked_get<Arg>(L, start + tracking.used, tracking));
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}
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};
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template <bool checkargs = default_check_arguments, std::size_t... I, typename R, typename... Args, typename Fx, typename... FxArgs, typename = std::enable_if_t<!std::is_void<R>::value>>
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inline decltype(auto) call(types<R>, types<Args...> ta, std::index_sequence<I...> tai, lua_State* L, int start, Fx&& fx, FxArgs&&... args) {
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#ifndef _MSC_VER
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static_assert(meta::all<meta::is_not_move_only<Args>...>::value, "One of the arguments being bound is a move-only type, and it is not being taken by reference: this will break your code. Please take a reference and std::move it manually if this was your intention.");
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#endif // This compiler make me so fucking sad
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multi_check<checkargs, Args...>(L, start, type_panic);
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record tracking{};
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return evaluator{}.eval(ta, tai, L, start, tracking, std::forward<Fx>(fx), std::forward<FxArgs>(args)...);
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}
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template <bool checkargs = default_check_arguments, std::size_t... I, typename... Args, typename Fx, typename... FxArgs>
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inline void call(types<void>, types<Args...> ta, std::index_sequence<I...> tai, lua_State* L, int start, Fx&& fx, FxArgs&&... args) {
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#ifndef _MSC_VER
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static_assert(meta::all<meta::is_not_move_only<Args>...>::value, "One of the arguments being bound is a move-only type, and it is not being taken by reference: this will break your code. Please take a reference and std::move it manually if this was your intention.");
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#endif // This compiler make me so fucking sad
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multi_check<checkargs, Args...>(L, start, type_panic);
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record tracking{};
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evaluator{}.eval(ta, tai, L, start, tracking, std::forward<Fx>(fx), std::forward<FxArgs>(args)...);
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}
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} // stack_detail
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template <typename T>
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int set_ref(lua_State* L, T&& arg, int tableindex = -2) {
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push(L, std::forward<T>(arg));
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return luaL_ref(L, tableindex);
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}
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template <bool check_args = stack_detail::default_check_arguments, typename R, typename... Args, typename Fx, typename... FxArgs, typename = std::enable_if_t<!std::is_void<R>::value>>
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inline decltype(auto) call(types<R> tr, types<Args...> ta, lua_State* L, int start, Fx&& fx, FxArgs&&... args) {
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typedef std::make_index_sequence<sizeof...(Args)> args_indices;
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return stack_detail::call<check_args>(tr, ta, args_indices(), L, start, std::forward<Fx>(fx), std::forward<FxArgs>(args)...);
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}
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template <bool check_args = stack_detail::default_check_arguments, typename R, typename... Args, typename Fx, typename... FxArgs, typename = std::enable_if_t<!std::is_void<R>::value>>
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inline decltype(auto) call(types<R> tr, types<Args...> ta, lua_State* L, Fx&& fx, FxArgs&&... args) {
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return call<check_args>(tr, ta, L, 1, std::forward<Fx>(fx), std::forward<FxArgs>(args)...);
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}
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template <bool check_args = stack_detail::default_check_arguments, typename... Args, typename Fx, typename... FxArgs>
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inline void call(types<void> tr, types<Args...> ta, lua_State* L, int start, Fx&& fx, FxArgs&&... args) {
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typedef std::make_index_sequence<sizeof...(Args)> args_indices;
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stack_detail::call<check_args>(tr, ta, args_indices(), L, start, std::forward<Fx>(fx), std::forward<FxArgs>(args)...);
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}
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template <bool check_args = stack_detail::default_check_arguments, typename... Args, typename Fx, typename... FxArgs>
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inline void call(types<void> tr, types<Args...> ta, lua_State* L, Fx&& fx, FxArgs&&... args) {
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call<check_args>(tr, ta, L, 1, std::forward<Fx>(fx), std::forward<FxArgs>(args)...);
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}
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template <bool check_args = stack_detail::default_check_arguments, typename R, typename... Args, typename Fx, typename... FxArgs, typename = std::enable_if_t<!std::is_void<R>::value>>
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inline decltype(auto) call_from_top(types<R> tr, types<Args...> ta, lua_State* L, Fx&& fx, FxArgs&&... args) {
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return call<check_args>(tr, ta, L, static_cast<int>(lua_gettop(L) - sizeof...(Args)), std::forward<Fx>(fx), std::forward<FxArgs>(args)...);
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}
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template <bool check_args = stack_detail::default_check_arguments, typename... Args, typename Fx, typename... FxArgs>
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inline void call_from_top(types<void> tr, types<Args...> ta, lua_State* L, Fx&& fx, FxArgs&&... args) {
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call<check_args>(tr, ta, L, static_cast<int>(lua_gettop(L) - sizeof...(Args)), std::forward<Fx>(fx), std::forward<FxArgs>(args)...);
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}
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template<bool check_args = stack_detail::default_check_arguments, typename... Args, typename Fx, typename... FxArgs>
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inline int call_into_lua(types<void> tr, types<Args...> ta, lua_State* L, int start, Fx&& fx, FxArgs&&... fxargs) {
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call<check_args>(tr, ta, L, start, std::forward<Fx>(fx), std::forward<FxArgs>(fxargs)...);
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lua_settop(L, 0);
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return 0;
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}
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template<bool check_args = stack_detail::default_check_arguments, typename Ret0, typename... Ret, typename... Args, typename Fx, typename... FxArgs, typename = std::enable_if_t<meta::neg<std::is_void<Ret0>>::value>>
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inline int call_into_lua(types<Ret0, Ret...>, types<Args...> ta, lua_State* L, int start, Fx&& fx, FxArgs&&... fxargs) {
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decltype(auto) r = call<check_args>(types<meta::return_type_t<Ret0, Ret...>>(), ta, L, start, std::forward<Fx>(fx), std::forward<FxArgs>(fxargs)...);
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lua_settop(L, 0);
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return push_reference(L, std::forward<decltype(r)>(r));
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}
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template<bool check_args = stack_detail::default_check_arguments, typename Fx, typename... FxArgs>
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inline int call_lua(lua_State* L, int start, Fx&& fx, FxArgs&&... fxargs) {
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typedef lua_bind_traits<meta::unqualified_t<Fx>> traits_type;
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typedef typename traits_type::args_list args_list;
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typedef typename traits_type::returns_list returns_list;
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return call_into_lua(returns_list(), args_list(), L, start, std::forward<Fx>(fx), std::forward<FxArgs>(fxargs)...);
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}
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inline call_syntax get_call_syntax(lua_State* L, const std::string& key, int index) {
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if (lua_gettop(L) == 0) {
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return call_syntax::dot;
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}
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luaL_getmetatable(L, key.c_str());
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auto pn = pop_n(L, 1);
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if (lua_compare(L, -1, index, LUA_OPEQ) != 1) {
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return call_syntax::dot;
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}
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return call_syntax::colon;
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}
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inline void script(lua_State* L, const std::string& code) {
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if (luaL_dostring(L, code.c_str())) {
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lua_error(L);
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}
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}
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inline void script_file(lua_State* L, const std::string& filename) {
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if (luaL_dofile(L, filename.c_str())) {
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lua_error(L);
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}
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}
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inline void luajit_exception_handler(lua_State* L, int(*handler)(lua_State*, lua_CFunction) = detail::c_trampoline) {
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#ifdef SOL_LUAJIT
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lua_pushlightuserdata(L, (void*)handler);
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auto pn = pop_n(L, 1);
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luaJIT_setmode(L, -1, LUAJIT_MODE_WRAPCFUNC | LUAJIT_MODE_ON);
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#else
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(void)L;
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(void)handler;
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#endif
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}
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inline void luajit_exception_off(lua_State* L) {
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#ifdef SOL_LUAJIT
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luaJIT_setmode(L, -1, LUAJIT_MODE_WRAPCFUNC | LUAJIT_MODE_OFF);
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#else
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(void)L;
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#endif
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}
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} // stack
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} // sol
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#endif // SOL_STACK_HPP
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