mirror of
https://github.com/ThePhD/sol2.git
synced 2024-03-22 13:10:44 +08:00
27174aba9c
Adds a `protect()` function to trigger safety for an item. This commit also optimizes away all instances of virtual function calls for function calls and storage. Will need to test speed to see how it works out. Closes #133 Closes #134 Closes #135 Closes #136
533 lines
15 KiB
C++
533 lines
15 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_PUSH_HPP
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#define SOL_STACK_PUSH_HPP
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#include "stack_core.hpp"
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#include "raii.hpp"
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#include "optional.hpp"
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#include <memory>
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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 pusher {
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template <typename K, typename... Args>
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static int push_keyed(lua_State* L, K&& k, Args&&... args) {
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// Basically, we store all user-data like this:
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// If it's a movable/copyable value (no std::ref(x)), then we store the pointer to the new
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// data in the first sizeof(T*) bytes, and then however many bytes it takes to
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// do the actual object. Things that are std::ref or plain T* are stored as
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// just the sizeof(T*), and nothing else.
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T** pointerpointer = static_cast<T**>(lua_newuserdata(L, sizeof(T*) + sizeof(T)));
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T*& referencereference = *pointerpointer;
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T* allocationtarget = reinterpret_cast<T*>(pointerpointer + 1);
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referencereference = allocationtarget;
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std::allocator<T> alloc{};
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alloc.construct(allocationtarget, std::forward<Args>(args)...);
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luaL_newmetatable(L, &k[0]);
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lua_setmetatable(L, -2);
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return 1;
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}
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template <typename... Args>
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static int push(lua_State* L, Args&&... args) {
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return push_keyed(L, usertype_traits<T>::metatable, std::forward<Args>(args)...);
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}
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};
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template<typename T>
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struct pusher<T*> {
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template <typename K>
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static int push_keyed(lua_State* L, K&& k, T* obj) {
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if (obj == nullptr)
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return stack::push(L, nil);
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T** pref = static_cast<T**>(lua_newuserdata(L, sizeof(T*)));
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*pref = obj;
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luaL_getmetatable(L, &k[0]);
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lua_setmetatable(L, -2);
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return 1;
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}
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static int push(lua_State* L, T* obj) {
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return push_keyed(L, usertype_traits<T*>::metatable, obj);
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}
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};
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template <>
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struct pusher<detail::as_reference_tag> {
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template <typename T>
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static int push(lua_State* L, T&& obj) {
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return stack::push(L, detail::ptr(obj));
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}
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};
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template<typename T>
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struct pusher<T, std::enable_if_t<is_unique_usertype<T>::value>> {
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typedef typename unique_usertype_traits<T>::type P;
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typedef typename unique_usertype_traits<T>::actual_type Real;
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template <typename Arg, meta::enable<std::is_base_of<Real, meta::unqualified_t<Arg>>> = meta::enabler>
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static int push(lua_State* L, Arg&& arg) {
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if (unique_usertype_traits<T>::is_null(arg))
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return stack::push(L, nil);
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return push_deep(L, std::forward<Arg>(arg));
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}
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template <typename Arg0, typename Arg1, typename... Args>
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static int push(lua_State* L, Arg0&& arg0, Arg0&& arg1, Args&&... args) {
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return push_deep(L, std::forward<Arg0>(arg0), std::forward<Arg1>(arg1), std::forward<Args>(args)...);
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}
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template <typename... Args>
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static int push_deep(lua_State* L, Args&&... args) {
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P** pref = static_cast<P**>(lua_newuserdata(L, sizeof(P*) + sizeof(detail::special_destruct_func) + sizeof(Real)));
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detail::special_destruct_func* fx = static_cast<detail::special_destruct_func*>(static_cast<void*>(pref + 1));
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Real* mem = static_cast<Real*>(static_cast<void*>(fx + 1));
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*fx = detail::special_destruct<P, Real>;
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detail::default_construct::construct(mem, std::forward<Args>(args)...);
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*pref = unique_usertype_traits<T>::get(*mem);
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if (luaL_newmetatable(L, &usertype_traits<detail::unique_usertype<P>>::metatable[0]) == 1) {
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set_field(L, "__gc", detail::unique_destruct<P>);
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}
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lua_setmetatable(L, -2);
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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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struct pusher<std::reference_wrapper<T>> {
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static int push(lua_State* L, const std::reference_wrapper<T>& t) {
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return stack::push(L, std::addressof(detail::deref(t.get())));
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}
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};
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template<typename T>
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struct pusher<T, std::enable_if_t<std::is_floating_point<T>::value>> {
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static int push(lua_State* L, const T& value) {
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lua_pushnumber(L, value);
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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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struct pusher<T, std::enable_if_t<meta::all<std::is_integral<T>, std::is_signed<T>>::value>> {
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static int push(lua_State* L, const T& value) {
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lua_pushinteger(L, static_cast<lua_Integer>(value));
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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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struct pusher<T, std::enable_if_t<std::is_enum<T>::value>> {
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static int push(lua_State* L, const T& value) {
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if (std::is_same<char, T>::value) {
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return stack::push(L, static_cast<int>(value));
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}
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return stack::push(L, static_cast<std::underlying_type_t<T>>(value));
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}
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};
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template<typename T>
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struct pusher<T, std::enable_if_t<meta::all<std::is_integral<T>, std::is_unsigned<T>>::value>> {
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static int push(lua_State* L, const T& value) {
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lua_pushinteger(L, static_cast<lua_Integer>(value));
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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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struct pusher<T, std::enable_if_t<meta::all<meta::has_begin_end<T>, meta::neg<meta::has_key_value_pair<T>>, meta::neg<meta::any<std::is_base_of<reference, T>, std::is_base_of<stack_reference, T>>>>::value>> {
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static int push(lua_State* L, const T& cont) {
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lua_createtable(L, static_cast<int>(cont.size()), 0);
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int tableindex = lua_gettop(L);
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unsigned index = 1;
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for (auto&& i : cont) {
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set_field(L, index++, i, tableindex);
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}
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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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struct pusher<T, std::enable_if_t<meta::all<meta::has_begin_end<T>, meta::has_key_value_pair<T>, meta::neg<meta::any<std::is_base_of<reference, T>, std::is_base_of<stack_reference, T>>>>::value>> {
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static int push(lua_State* L, const T& cont) {
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lua_createtable(L, static_cast<int>(cont.size()), 0);
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int tableindex = lua_gettop(L);
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for (auto&& pair : cont) {
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set_field(L, pair.first, pair.second, tableindex);
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}
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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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struct pusher<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 int push(lua_State*, T& ref) {
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return ref.push();
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}
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static int push(lua_State*, T&& ref) {
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return ref.push();
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}
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};
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template<>
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struct pusher<bool> {
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static int push(lua_State* L, bool b) {
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lua_pushboolean(L, b);
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return 1;
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}
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};
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template<>
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struct pusher<nil_t> {
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static int push(lua_State* L, nil_t) {
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lua_pushnil(L);
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return 1;
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}
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};
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template<>
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struct pusher<metatable_key_t> {
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static int push(lua_State* L, metatable_key_t) {
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lua_pushlstring(L, "__mt", 4);
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return 1;
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}
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};
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template<>
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struct pusher<std::remove_pointer_t<lua_CFunction>> {
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static int push(lua_State* L, lua_CFunction func, int n = 0) {
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lua_pushcclosure(L, func, n);
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return 1;
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}
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};
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template<>
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struct pusher<lua_CFunction> {
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static int push(lua_State* L, lua_CFunction func, int n = 0) {
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lua_pushcclosure(L, func, n);
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return 1;
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}
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};
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template<>
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struct pusher<c_closure> {
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static int push(lua_State* L, c_closure cc) {
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lua_pushcclosure(L, cc.c_function, cc.upvalues);
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return 1;
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}
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};
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template<typename Arg, typename... Args>
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struct pusher<closure<Arg, Args...>> {
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template <std::size_t... I, typename T>
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static int push(std::index_sequence<I...>, lua_State* L, T&& c) {
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int pushcount = multi_push(L, detail::forward_get<I>(c.upvalues)...);
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return stack::push(L, c_closure(c.c_function, pushcount));
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}
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template <typename T>
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static int push(lua_State* L, T&& c) {
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return push(std::make_index_sequence<1 + sizeof...(Args)>(), L, std::forward<T>(c));
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}
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};
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template<>
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struct pusher<void*> {
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static int push(lua_State* L, void* userdata) {
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lua_pushlightuserdata(L, userdata);
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return 1;
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}
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};
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template<>
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struct pusher<lightuserdata_value> {
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static int push(lua_State* L, lightuserdata_value userdata) {
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lua_pushlightuserdata(L, userdata);
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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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struct pusher<light<T>> {
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static int push(lua_State* L, light<T> l) {
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lua_pushlightuserdata(L, static_cast<void*>(l.value));
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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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struct pusher<user<T>> {
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template <bool with_meta = true, typename... Args>
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static int push_with(lua_State* L, Args&&... args) {
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// A dumb pusher
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void* rawdata = lua_newuserdata(L, sizeof(T));
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T* data = static_cast<T*>(rawdata);
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std::allocator<T> alloc;
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alloc.construct(data, std::forward<Args>(args)...);
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if (with_meta) {
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lua_CFunction cdel = stack_detail::alloc_destroy<T>;
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// Make sure we have a plain GC set for this data
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lua_createtable(L, 0, 1);
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lua_pushlightuserdata(L, rawdata);
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lua_pushcclosure(L, cdel, 1);
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lua_setfield(L, -2, "__gc");
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lua_setmetatable(L, -2);
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}
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return 1;
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}
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template <typename... Args>
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static int push(lua_State* L, Args&&... args) {
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return push_with(L, std::forward<Args>(args)...);
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}
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static int push(lua_State* L, const user<T>& u) {
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return push_with(L, u.value);
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}
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static int push(lua_State* L, user<T>&& u) {
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return push_with(L, std::move(u.value));
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}
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static int push(lua_State* L, no_metatable_t, const user<T>& u) {
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return push_with<false>(L, u.value);
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}
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static int push(lua_State* L, no_metatable_t, user<T>&& u) {
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return push_with<false>(L, std::move(u.value));
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}
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};
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template<>
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struct pusher<userdata_value> {
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static int push(lua_State* L, userdata_value data) {
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void** ud = static_cast<void**>(lua_newuserdata(L, sizeof(void*)));
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*ud = data.value;
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return 1;
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}
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};
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template<>
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struct pusher<const char*> {
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static int push(lua_State* L, const char* str) {
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lua_pushlstring(L, str, std::char_traits<char>::length(str));
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return 1;
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}
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};
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template<size_t N>
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struct pusher<char[N]> {
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static int push(lua_State* L, const char(&str)[N]) {
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lua_pushlstring(L, str, N - 1);
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return 1;
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}
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};
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template <>
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struct pusher<char> {
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static int push(lua_State* L, char c) {
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const char str[2] = { c, '\0' };
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return stack::push(L, str);
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}
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};
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template<>
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struct pusher<std::string> {
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static int push(lua_State* L, const std::string& str) {
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lua_pushlstring(L, str.c_str(), str.size());
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return 1;
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}
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};
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template<>
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struct pusher<meta_function> {
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static int push(lua_State* L, meta_function m) {
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const std::string& str = name_of(m);
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lua_pushlstring(L, str.c_str(), str.size());
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return 1;
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}
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};
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#if 0
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template<>
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struct pusher<const wchar_t*> {
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static int push(lua_State* L, const wchar_t* wstr) {
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return push(L, wstr, wstr + std::char_traits<wchar_t>::length(wstr));
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}
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static int push(lua_State* L, const wchar_t* wstrb, const wchar_t* wstre) {
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std::string str{};
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return stack::push(L, str);
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}
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};
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template<>
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struct pusher<const char16_t*> {
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static int push(lua_State* L, const char16_t* u16str) {
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return push(L, u16str, u16str + std::char_traits<char16_t>::length(u16str));
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}
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static int push(lua_State* L, const char16_t* u16strb, const char16_t* u16stre) {
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std::string str{};
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return stack::push(L, str);
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}
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};
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template<>
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struct pusher<const char32_t*> {
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static int push(lua_State* L, const char32_t* u32str) {
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return push(L, u32str, u32str + std::char_traits<char32_t>::length(u32str));
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}
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static int push(lua_State* L, const char32_t* u32strb, const char32_t* u32stre) {
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std::string str{};
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return stack::push(L, str);
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}
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};
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template<size_t N>
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struct pusher<wchar_t[N]> {
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static int push(lua_State* L, const wchar_t(&str)[N]) {
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return stack::push<const wchar_t*>(L, str, str + N - 1);
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}
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};
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template<size_t N>
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struct pusher<char16_t[N]> {
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static int push(lua_State* L, const char16_t(&str)[N]) {
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return stack::push<const char16_t*>(L, str, str + N - 1);
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}
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};
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template<size_t N>
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struct pusher<char32_t[N]> {
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static int push(lua_State* L, const char32_t(&str)[N]) {
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return stack::push<const char32_t*>(L, str, str + N - 1);
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}
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};
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template <>
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struct pusher<wchar_t> {
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static int push(lua_State* L, wchar_t c) {
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const wchar_t str[2] = { c, '\0' };
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return stack::push(L, str);
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}
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};
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template <>
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struct pusher<char16_t> {
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static int push(lua_State* L, char16_t c) {
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const char16_t str[2] = { c, '\0' };
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return stack::push(L, str);
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}
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};
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template <>
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struct pusher<char32_t> {
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static int push(lua_State* L, char32_t c) {
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const char32_t str[2] = { c, '\0' };
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return stack::push(L, str);
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}
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};
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template<>
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struct pusher<std::wstring> {
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static int push(lua_State* L, const std::wstring& wstr) {
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return stack::push(L, wstr.data(), wstr.data() + wstr.size());
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}
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};
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template<>
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struct pusher<std::u16string> {
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static int push(lua_State* L, const std::u16string& u16str) {
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return stack::push(L, u16str.data(), u16str.data() + u16str.size());
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}
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};
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template<>
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struct pusher<std::u32string> {
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static int push(lua_State* L, const std::u32string& u32str) {
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return stack::push(L, u32str.data(), u32str.data() + u32str.size());
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}
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};
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#endif // Bad conversions
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template<typename... Args>
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struct pusher<std::tuple<Args...>> {
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template <std::size_t... I, typename T>
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static int push(std::index_sequence<I...>, lua_State* L, T&& t) {
|
|
int pushcount = 0;
|
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(void)detail::swallow{ 0, (pushcount += stack::push(L,
|
|
detail::forward_get<I>(t)
|
|
), 0)... };
|
|
return pushcount;
|
|
}
|
|
|
|
template <typename T>
|
|
static int push(lua_State* L, T&& t) {
|
|
return push(std::index_sequence_for<Args...>(), L, std::forward<T>(t));
|
|
}
|
|
};
|
|
|
|
template<typename A, typename B>
|
|
struct pusher<std::pair<A, B>> {
|
|
template <typename T>
|
|
static int push(lua_State* L, T&& t) {
|
|
int pushcount = stack::push(L, detail::forward_get<0>(t));
|
|
pushcount += stack::push(L, detail::forward_get<1>(t));
|
|
return pushcount;
|
|
}
|
|
};
|
|
|
|
template<typename O>
|
|
struct pusher<optional<O>> {
|
|
template <typename T>
|
|
static int push(lua_State* L, T&& t) {
|
|
if (t == nullopt) {
|
|
return stack::push(L, nullopt);
|
|
}
|
|
return stack::push(L, t.value());
|
|
}
|
|
};
|
|
|
|
template<>
|
|
struct pusher<nullopt_t> {
|
|
static int push(lua_State* L, nullopt_t) {
|
|
return stack::push(L, nil);
|
|
}
|
|
};
|
|
|
|
template<>
|
|
struct pusher<this_state> {
|
|
static int push(lua_State*, const this_state&) {
|
|
return 0;
|
|
}
|
|
};
|
|
} // stack
|
|
} // sol
|
|
|
|
#endif // SOL_STACK_PUSH_HPP
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