mirror of
https://github.com/ThePhD/sol2.git
synced 2024-03-22 13:10:44 +08:00
c7deb82535
Temporary warnings against alignment padding nonsense. Closes #325 Still need to test #324 and find out what's wrong with #327
552 lines
16 KiB
C++
552 lines
16 KiB
C++
// The MIT License (MIT)
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// Copyright (c) 2013-2016 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_GET_HPP
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#define SOL_STACK_GET_HPP
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#include "stack_core.hpp"
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#include "usertype_traits.hpp"
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#include "inheritance.hpp"
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#include "overload.hpp"
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#include "error.hpp"
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#include <memory>
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#include <functional>
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#include <utility>
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#ifdef SOL_CODECVT_SUPPORT
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#include <codecvt>
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#include <locale>
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#endif
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namespace sol {
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namespace stack {
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template<typename T, typename>
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struct getter {
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static T& get(lua_State* L, int index, record& tracking) {
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return getter<sol::detail::as_value_tag<T>>{}.get(L, index, tracking);
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}
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};
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template<typename T>
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struct getter<T, std::enable_if_t<std::is_floating_point<T>::value>> {
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static T get(lua_State* L, int index, record& tracking) {
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tracking.use(1);
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return static_cast<T>(lua_tonumber(L, index));
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}
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};
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template<typename T>
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struct getter<T, std::enable_if_t<meta::all<std::is_integral<T>, std::is_signed<T>>::value>> {
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static T get(lua_State* L, int index, record& tracking) {
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tracking.use(1);
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return static_cast<T>(lua_tointeger(L, index));
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}
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};
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template<typename T>
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struct getter<T, std::enable_if_t<meta::all<std::is_integral<T>, std::is_unsigned<T>>::value>> {
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static T get(lua_State* L, int index, record& tracking) {
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tracking.use(1);
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return static_cast<T>(lua_tointeger(L, index));
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}
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};
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template<typename T>
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struct getter<T, std::enable_if_t<std::is_enum<T>::value>> {
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static T get(lua_State* L, int index, record& tracking) {
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tracking.use(1);
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return static_cast<T>(lua_tointegerx(L, index, nullptr));
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}
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};
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template<typename T>
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struct getter<as_table_t<T>, std::enable_if_t<!meta::has_key_value_pair<meta::unqualified_t<T>>::value>> {
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static T get(lua_State* L, int index, record& tracking) {
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typedef typename T::value_type V;
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tracking.use(1);
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index = lua_absindex(L, index);
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T arr;
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get_field<false, true>(L, static_cast<lua_Integer>(-1), index);
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int isnum;
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std::size_t sizehint = static_cast<std::size_t>(lua_tointegerx(L, -1, &isnum));
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if (isnum != 0) {
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detail::reserve(arr, sizehint);
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}
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lua_pop(L, 1);
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#if SOL_LUA_VERSION >= 503
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// This method is HIGHLY performant over regular table iteration thanks to the Lua API changes in 5.3
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for (lua_Integer i = 0; ; i += lua_size<V>::value, lua_pop(L, lua_size<V>::value)) {
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for (int vi = 0; vi < lua_size<V>::value; ++vi) {
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type t = static_cast<type>(lua_geti(L, index, i + vi));
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if (t == type::lua_nil) {
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if (i == 0) {
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continue;
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}
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else {
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lua_pop(L, (vi + 1));
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return arr;
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}
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}
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}
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arr.push_back(stack::get<V>(L, -lua_size<V>::value));
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}
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#else
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// Zzzz slower but necessary thanks to the lower version API and missing functions qq
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for (lua_Integer i = 0; ; i += lua_size<V>::value, lua_pop(L, lua_size<V>::value)) {
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for (int vi = 0; vi < lua_size<V>::value; ++vi) {
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lua_pushinteger(L, i);
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lua_gettable(L, index);
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type t = type_of(L, -1);
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if (t == type::lua_nil) {
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if (i == 0) {
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continue;
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}
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else {
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lua_pop(L, (vi + 1));
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return arr;
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}
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}
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}
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arr.push_back(stack::get<V>(L, -1));
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}
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#endif
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return arr;
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}
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};
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template<typename T>
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struct getter<as_table_t<T>, std::enable_if_t<meta::has_key_value_pair<meta::unqualified_t<T>>::value>> {
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static T get(lua_State* L, int index, record& tracking) {
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typedef typename T::value_type P;
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typedef typename P::first_type K;
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typedef typename P::second_type V;
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tracking.use(1);
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T associative;
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index = lua_absindex(L, index);
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lua_pushnil(L);
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while (lua_next(L, index) != 0) {
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decltype(auto) key = stack::check_get<K>(L, -2);
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if (!key) {
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lua_pop(L, 1);
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continue;
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}
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associative.emplace(std::forward<decltype(*key)>(*key), stack::get<V>(L, -1));
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lua_pop(L, 1);
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}
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return associative;
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}
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};
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template<typename T>
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struct getter<T, std::enable_if_t<std::is_base_of<reference, T>::value || std::is_base_of<stack_reference, T>::value>> {
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static T get(lua_State* L, int index, record& tracking) {
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tracking.use(1);
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return T(L, index);
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}
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};
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template<>
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struct getter<userdata_value> {
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static userdata_value get(lua_State* L, int index, record& tracking) {
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tracking.use(1);
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return userdata_value(lua_touserdata(L, index));
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}
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};
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template<>
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struct getter<lightuserdata_value> {
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static lightuserdata_value get(lua_State* L, int index, record& tracking) {
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tracking.use(1);
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return lightuserdata_value(lua_touserdata(L, index));
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}
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};
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template<typename T>
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struct getter<light<T>> {
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static light<T> get(lua_State* L, int index, record& tracking) {
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tracking.use(1);
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return light<T>(static_cast<T*>(lua_touserdata(L, index)));
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}
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};
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template<typename T>
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struct getter<user<T>> {
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static T& get(lua_State* L, int index, record& tracking) {
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tracking.use(1);
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return *static_cast<T*>(lua_touserdata(L, index));
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}
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};
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template<typename T>
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struct getter<user<T*>> {
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static T* get(lua_State* L, int index, record& tracking) {
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tracking.use(1);
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return static_cast<T*>(lua_touserdata(L, index));
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}
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};
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template<>
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struct getter<type> {
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static type get(lua_State *L, int index, record& tracking) {
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tracking.use(1);
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return static_cast<type>(lua_type(L, index));
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}
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};
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template<>
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struct getter<bool> {
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static bool get(lua_State* L, int index, record& tracking) {
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tracking.use(1);
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return lua_toboolean(L, index) != 0;
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}
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};
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template<>
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struct getter<std::string> {
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static std::string get(lua_State* L, int index, record& tracking) {
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tracking.use(1);
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std::size_t len;
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auto str = lua_tolstring(L, index, &len);
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return std::string( str, len );
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}
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};
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template <>
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struct getter<string_detail::string_shim> {
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string_detail::string_shim get(lua_State* L, int index, record& tracking) {
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tracking.use(1);
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size_t len;
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const char* p = lua_tolstring(L, index, &len);
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return string_detail::string_shim(p, len);
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}
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};
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template<>
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struct getter<const char*> {
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static const char* get(lua_State* L, int index, record& tracking) {
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tracking.use(1);
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return lua_tostring(L, index);
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}
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};
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template<>
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struct getter<char> {
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static char get(lua_State* L, int index, record& tracking) {
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tracking.use(1);
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size_t len;
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auto str = lua_tolstring(L, index, &len);
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return len > 0 ? str[0] : '\0';
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}
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};
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#ifdef SOL_CODECVT_SUPPORT
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template<>
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struct getter<std::wstring> {
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static std::wstring get(lua_State* L, int index, record& tracking) {
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tracking.use(1);
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size_t len;
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auto str = lua_tolstring(L, index, &len);
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if (len < 1)
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return std::wstring();
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if (sizeof(wchar_t) == 2) {
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static std::wstring_convert<std::codecvt_utf8_utf16<wchar_t>> convert;
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std::wstring r = convert.from_bytes(str, str + len);
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#ifdef __MINGW32__
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// Fuck you, MinGW, and fuck you libstdc++ for introducing this absolutely asinine bug
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// https://sourceforge.net/p/mingw-w64/bugs/538/
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// http://chat.stackoverflow.com/transcript/message/32271369#32271369
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for (auto& c : r) {
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uint8_t* b = reinterpret_cast<uint8_t*>(&c);
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std::swap(b[0], b[1]);
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}
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#endif
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return r;
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}
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static std::wstring_convert<std::codecvt_utf8<wchar_t>> convert;
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std::wstring r = convert.from_bytes(str, str + len);
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return r;
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}
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};
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template<>
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struct getter<std::u16string> {
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static std::u16string get(lua_State* L, int index, record& tracking) {
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tracking.use(1);
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size_t len;
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auto str = lua_tolstring(L, index, &len);
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if (len < 1)
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return std::u16string();
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#ifdef _MSC_VER
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static std::wstring_convert<std::codecvt_utf8_utf16<int16_t>, int16_t> convert;
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auto intd = convert.from_bytes(str, str + len);
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std::u16string r(intd.size(), '\0');
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std::memcpy(&r[0], intd.data(), intd.size() * sizeof(char16_t));
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#else
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static std::wstring_convert<std::codecvt_utf8_utf16<char16_t>, char16_t> convert;
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std::u16string r = convert.from_bytes(str, str + len);
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#endif // VC++ is a shit
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return r;
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}
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};
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template<>
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struct getter<std::u32string> {
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static std::u32string get(lua_State* L, int index, record& tracking) {
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tracking.use(1);
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size_t len;
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auto str = lua_tolstring(L, index, &len);
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if (len < 1)
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return std::u32string();
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#ifdef _MSC_VER
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static std::wstring_convert<std::codecvt_utf8<int32_t>, int32_t> convert;
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auto intd = convert.from_bytes(str, str + len);
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std::u32string r(intd.size(), '\0');
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std::memcpy(&r[0], intd.data(), r.size() * sizeof(char32_t));
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#else
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static std::wstring_convert<std::codecvt_utf8<char32_t>, char32_t> convert;
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std::u32string r = convert.from_bytes(str, str + len);
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#endif // VC++ is a shit
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return r;
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}
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};
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template<>
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struct getter<wchar_t> {
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static wchar_t get(lua_State* L, int index, record& tracking) {
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auto str = getter<std::wstring>{}.get(L, index, tracking);
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return str.size() > 0 ? str[0] : wchar_t(0);
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}
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};
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template<>
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struct getter<char16_t> {
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static char16_t get(lua_State* L, int index, record& tracking) {
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auto str = getter<std::u16string>{}.get(L, index, tracking);
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return str.size() > 0 ? str[0] : char16_t(0);
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}
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};
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template<>
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struct getter<char32_t> {
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static char32_t get(lua_State* L, int index, record& tracking) {
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auto str = getter<std::u32string>{}.get(L, index, tracking);
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return str.size() > 0 ? str[0] : char32_t(0);
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}
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};
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#endif // codecvt header support
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template<>
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struct getter<meta_function> {
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static meta_function get(lua_State *L, int index, record& tracking) {
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tracking.use(1);
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const char* name = getter<const char*>{}.get(L, index, tracking);
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for (std::size_t i = 0; i < meta_function_names.size(); ++i)
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if (meta_function_names[i] == name)
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return static_cast<meta_function>(i);
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return meta_function::construct;
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}
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};
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template<>
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struct getter<lua_nil_t> {
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static lua_nil_t get(lua_State*, int, record& tracking) {
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tracking.use(1);
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return lua_nil;
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}
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};
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template<>
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struct getter<std::nullptr_t> {
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static std::nullptr_t get(lua_State*, int, record& tracking) {
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tracking.use(1);
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return nullptr;
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}
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};
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template<>
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struct getter<nullopt_t> {
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static nullopt_t get(lua_State*, int, record& tracking) {
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tracking.use(1);
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return nullopt;
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}
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};
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template<>
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struct getter<this_state> {
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static this_state get(lua_State* L, int, record& tracking) {
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tracking.use(0);
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return this_state{ L };
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}
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};
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template<>
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struct getter<lua_CFunction> {
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static lua_CFunction get(lua_State* L, int index, record& tracking) {
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tracking.use(1);
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return lua_tocfunction(L, index);
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}
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};
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template<>
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struct getter<c_closure> {
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static c_closure get(lua_State* L, int index, record& tracking) {
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tracking.use(1);
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return c_closure(lua_tocfunction(L, index), -1);
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}
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};
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template<>
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struct getter<error> {
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static error get(lua_State* L, int index, record& tracking) {
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tracking.use(1);
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size_t sz = 0;
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const char* err = lua_tolstring(L, index, &sz);
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if (err == nullptr) {
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return error(detail::direct_error, "");
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}
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return error(detail::direct_error, std::string(err, sz));
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}
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};
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template<>
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struct getter<void*> {
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static void* get(lua_State* L, int index, record& tracking) {
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tracking.use(1);
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return lua_touserdata(L, index);
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}
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};
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template<typename T>
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struct getter<detail::as_value_tag<T>> {
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static T* get_no_lua_nil(lua_State* L, int index, record& tracking) {
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tracking.use(1);
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void** pudata = static_cast<void**>(lua_touserdata(L, index));
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void* udata = *pudata;
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return get_no_lua_nil_from(L, udata, index, tracking);
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}
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static T* get_no_lua_nil_from(lua_State* L, void* udata, int index, record&) {
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if (detail::has_derived<T>::value && luaL_getmetafield(L, index, &detail::base_class_cast_key()[0]) != 0) {
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void* basecastdata = lua_touserdata(L, -1);
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detail::inheritance_cast_function ic = (detail::inheritance_cast_function)basecastdata;
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// use the casting function to properly adjust the pointer for the desired T
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udata = ic(udata, detail::id_for<T>::value);
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lua_pop(L, 1);
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}
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T* obj = static_cast<T*>(udata);
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return obj;
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}
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static T& get(lua_State* L, int index, record& tracking) {
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return *get_no_lua_nil(L, index, tracking);
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}
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};
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template<typename T>
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struct getter<detail::as_pointer_tag<T>> {
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static T* get(lua_State* L, int index, record& tracking) {
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type t = type_of(L, index);
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if (t == type::lua_nil) {
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tracking.use(1);
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return nullptr;
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}
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return getter<detail::as_value_tag<T>>::get_no_lua_nil(L, index, tracking);
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}
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};
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template<typename T>
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struct getter<non_null<T*>> {
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static T* get(lua_State* L, int index, record& tracking) {
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return getter<detail::as_value_tag<T>>::get_no_lua_nil(L, index, tracking);
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}
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};
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template<typename T>
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struct getter<T&> {
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static T& get(lua_State* L, int index, record& tracking) {
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return getter<detail::as_value_tag<T>>::get(L, index, tracking);
|
|
}
|
|
};
|
|
|
|
template<typename T>
|
|
struct getter<std::reference_wrapper<T>> {
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|
static T& get(lua_State* L, int index, record& tracking) {
|
|
return getter<T&>{}.get(L, index, tracking);
|
|
}
|
|
};
|
|
|
|
template<typename T>
|
|
struct getter<T*> {
|
|
static T* get(lua_State* L, int index, record& tracking) {
|
|
return getter<detail::as_pointer_tag<T>>::get(L, index, tracking);
|
|
}
|
|
};
|
|
|
|
template<typename T>
|
|
struct getter<T, std::enable_if_t<is_unique_usertype<T>::value>> {
|
|
typedef typename unique_usertype_traits<T>::type P;
|
|
typedef typename unique_usertype_traits<T>::actual_type Real;
|
|
|
|
static Real& get(lua_State* L, int index, record& tracking) {
|
|
tracking.use(1);
|
|
P** pref = static_cast<P**>(lua_touserdata(L, index));
|
|
detail::special_destruct_func* fx = static_cast<detail::special_destruct_func*>(static_cast<void*>(pref + 1));
|
|
Real* mem = static_cast<Real*>(static_cast<void*>(fx + 1));
|
|
return *mem;
|
|
}
|
|
};
|
|
|
|
template<typename... Args>
|
|
struct getter<std::tuple<Args...>> {
|
|
typedef std::tuple<decltype(stack::get<Args>(nullptr, 0))...> R;
|
|
|
|
template <typename... TArgs>
|
|
static R apply(std::index_sequence<>, lua_State*, int, record&, TArgs&&... args) {
|
|
// Fuck you too, VC++
|
|
return R{std::forward<TArgs>(args)...};
|
|
}
|
|
|
|
template <std::size_t I, std::size_t... Ix, typename... TArgs>
|
|
static R apply(std::index_sequence<I, Ix...>, lua_State* L, int index, record& tracking, TArgs&&... args) {
|
|
// Fuck you too, VC++
|
|
typedef std::tuple_element_t<I, std::tuple<Args...>> T;
|
|
return apply(std::index_sequence<Ix...>(), L, index, tracking, std::forward<TArgs>(args)..., stack::get<T>(L, index + tracking.used, tracking));
|
|
}
|
|
|
|
static R get(lua_State* L, int index, record& tracking) {
|
|
return apply(std::make_index_sequence<sizeof...(Args)>(), L, index, tracking);
|
|
}
|
|
};
|
|
|
|
template<typename A, typename B>
|
|
struct getter<std::pair<A, B>> {
|
|
static decltype(auto) get(lua_State* L, int index, record& tracking) {
|
|
return std::pair<decltype(stack::get<A>(L, index)), decltype(stack::get<B>(L, index))>{stack::get<A>(L, index, tracking), stack::get<B>(L, index + tracking.used, tracking)};
|
|
}
|
|
};
|
|
|
|
} // stack
|
|
} // sol
|
|
|
|
#endif // SOL_STACK_GET_HPP
|