mirror of
https://github.com/ThePhD/sol2.git
synced 2024-03-22 13:10:44 +08:00
446 lines
13 KiB
C++
446 lines
13 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_STATE_VIEW_HPP
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#define SOL_STATE_VIEW_HPP
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#include "error.hpp"
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#include "table.hpp"
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#include "load_result.hpp"
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#include <memory>
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namespace sol {
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enum class lib : char {
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base,
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package,
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coroutine,
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string,
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os,
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math,
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table,
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debug,
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bit32,
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io,
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ffi,
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jit,
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utf8,
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count
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};
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class state_view {
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private:
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lua_State* L;
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table reg;
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global_table global;
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optional<object> is_loaded_package(const std::string& key) {
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auto loaded = reg.traverse_get<optional<object>>("_LOADED", key);
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bool is53mod = loaded && !(loaded->is<bool>() && !loaded->as<bool>());
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if (is53mod)
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return loaded;
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#if SOL_LUA_VERSION <= 501
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auto loaded51 = global.traverse_get<optional<object>>("package", "loaded", key);
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bool is51mod = loaded51 && !(loaded51->is<bool>() && !loaded51->as<bool>());
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if (is51mod)
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return loaded51;
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#endif
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return nullopt;
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}
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template <typename T>
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void ensure_package(const std::string& key, T&& sr) {
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#if SOL_LUA_VERSION <= 501
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auto pkg = global["package"];
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if (!pkg.valid()) {
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pkg = create_table_with("loaded", create_table_with(key, sr));
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}
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else {
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auto ld = pkg["loaded"];
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if (!ld.valid()) {
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ld = create_table_with(key, sr);
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}
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else {
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ld[key] = sr;
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}
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}
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#endif
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auto loaded = reg["_LOADED"];
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if (!loaded.valid()) {
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loaded = create_table_with(key, sr);
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}
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else {
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loaded[key] = sr;
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}
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}
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template <typename Fx>
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object require_core(const std::string& key, Fx&& action, bool create_global = true) {
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optional<object> loaded = is_loaded_package(key);
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if (loaded && loaded->valid())
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return std::move(*loaded);
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action();
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auto sr = stack::get<stack_reference>(L);
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if (create_global)
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set(key, sr);
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ensure_package(key, sr);
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return stack::pop<object>(L);
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}
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public:
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typedef global_table::iterator iterator;
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typedef global_table::const_iterator const_iterator;
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state_view(lua_State* L) :
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L(L),
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reg(L, LUA_REGISTRYINDEX),
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global(L, detail::global_) {
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}
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lua_State* lua_state() const {
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return L;
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}
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template<typename... Args>
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void open_libraries(Args&&... args) {
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static_assert(meta::all_same<lib, Args...>::value, "all types must be libraries");
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if (sizeof...(args) == 0) {
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luaL_openlibs(L);
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return;
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}
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lib libraries[1 + sizeof...(args)] = { lib::count, std::forward<Args>(args)... };
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for (auto&& library : libraries) {
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switch (library) {
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#if SOL_LUA_VERSION <= 501 && defined(SOL_LUAJIT)
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case lib::coroutine:
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#endif // luajit opens coroutine base stuff
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case lib::base:
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luaL_requiref(L, "base", luaopen_base, 1);
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lua_pop(L, 1);
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break;
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case lib::package:
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luaL_requiref(L, "package", luaopen_package, 1);
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lua_pop(L, 1);
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break;
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#if !defined(SOL_LUAJIT)
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case lib::coroutine:
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#if SOL_LUA_VERSION > 501
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luaL_requiref(L, "coroutine", luaopen_coroutine, 1);
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lua_pop(L, 1);
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#endif // Lua 5.2+ only
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break;
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#endif // Not LuaJIT
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case lib::string:
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luaL_requiref(L, "string", luaopen_string, 1);
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lua_pop(L, 1);
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break;
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case lib::table:
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luaL_requiref(L, "table", luaopen_table, 1);
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lua_pop(L, 1);
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break;
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case lib::math:
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luaL_requiref(L, "math", luaopen_math, 1);
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lua_pop(L, 1);
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break;
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case lib::bit32:
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#ifdef SOL_LUAJIT
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luaL_requiref(L, "bit32", luaopen_bit, 1);
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lua_pop(L, 1);
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#elif SOL_LUA_VERSION == 502
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luaL_requiref(L, "bit32", luaopen_bit32, 1);
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lua_pop(L, 1);
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#else
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#endif // Lua 5.2 only (deprecated in 5.3 (503))
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break;
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case lib::io:
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luaL_requiref(L, "io", luaopen_io, 1);
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lua_pop(L, 1);
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break;
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case lib::os:
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luaL_requiref(L, "os", luaopen_os, 1);
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lua_pop(L, 1);
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break;
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case lib::debug:
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luaL_requiref(L, "debug", luaopen_debug, 1);
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lua_pop(L, 1);
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break;
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case lib::utf8:
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#if SOL_LUA_VERSION > 502 && !defined(SOL_LUAJIT)
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luaL_requiref(L, "utf8", luaopen_utf8, 1);
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lua_pop(L, 1);
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#endif // Lua 5.3+ only
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break;
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case lib::ffi:
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#ifdef SOL_LUAJIT
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luaL_requiref(L, "ffi", luaopen_ffi, 1);
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lua_pop(L, 1);
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#endif
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break;
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case lib::jit:
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#ifdef SOL_LUAJIT
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luaL_requiref(L, "jit", luaopen_jit, 1);
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lua_pop(L, 1);
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#endif
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break;
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case lib::count:
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default:
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break;
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}
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}
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}
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object require(const std::string& key, lua_CFunction open_function, bool create_global = true) {
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luaL_requiref(L, key.c_str(), open_function, create_global ? 1 : 0);
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return stack::pop<object>(L);
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}
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object require_script(const std::string& key, const std::string& code, bool create_global = true) {
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return require_core(key, [this, &code]() {stack::script(L, code); }, create_global);
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}
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object require_file(const std::string& key, const std::string& filename, bool create_global = true) {
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return require_core(key, [this, &filename]() {stack::script_file(L, filename); }, create_global);
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}
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function_result script(const std::string& code) {
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int index = (::std::max)(lua_gettop(L), 1);
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stack::script(L, code);
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int returns = lua_gettop(L) - (index - 1);
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return function_result(L, index, returns);
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}
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function_result script_file(const std::string& filename) {
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int index = (::std::max)(lua_gettop(L), 1);
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stack::script_file(L, filename);
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int returns = lua_gettop(L) - index;
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return function_result(L, index, returns);
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}
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load_result load(const std::string& code) {
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load_status x = static_cast<load_status>(luaL_loadstring(L, code.c_str()));
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return load_result(L, -1, 1, 1, x);
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}
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load_result load_file(const std::string& filename) {
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load_status x = static_cast<load_status>(luaL_loadfile(L, filename.c_str()));
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return load_result(L, -1, 1, 1, x);
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}
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load_result load_buffer(const char *buff, size_t size, const char *name, const char* mode = nullptr) {
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load_status x = static_cast<load_status>(luaL_loadbufferx(L, buff, size, name, mode));
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return load_result(L, -1, 1, 1, x);
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}
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iterator begin() const {
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return global.begin();
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}
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iterator end() const {
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return global.end();
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}
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const_iterator cbegin() const {
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return global.cbegin();
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}
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const_iterator cend() const {
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return global.cend();
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}
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global_table globals() const {
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return global;
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}
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table registry() const {
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return reg;
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}
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operator lua_State* () const {
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return lua_state();
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}
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void set_panic(lua_CFunction panic) {
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lua_atpanic(L, panic);
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}
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template<typename... Args, typename... Keys>
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decltype(auto) get(Keys&&... keys) const {
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return global.get<Args...>(std::forward<Keys>(keys)...);
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}
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template<typename T, typename Key>
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decltype(auto) get_or(Key&& key, T&& otherwise) const {
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return global.get_or(std::forward<Key>(key), std::forward<T>(otherwise));
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}
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template<typename T, typename Key, typename D>
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decltype(auto) get_or(Key&& key, D&& otherwise) const {
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return global.get_or<T>(std::forward<Key>(key), std::forward<D>(otherwise));
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}
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template<typename... Args>
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state_view& set(Args&&... args) {
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global.set(std::forward<Args>(args)...);
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return *this;
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}
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template<typename T, typename... Keys>
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decltype(auto) traverse_get(Keys&&... keys) const {
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return global.traverse_get<T>(std::forward<Keys>(keys)...);
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}
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template<typename... Args>
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state_view& traverse_set(Args&&... args) {
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global.traverse_set(std::forward<Args>(args)...);
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return *this;
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}
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template<typename T>
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state_view& set_usertype(usertype<T>& user) {
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return set_usertype(usertype_traits<T>::name, user);
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}
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template<typename Key, typename T>
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state_view& set_usertype(Key&& key, usertype<T>& user) {
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global.set_usertype(std::forward<Key>(key), user);
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return *this;
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}
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template<typename Class, typename... Args>
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state_view& new_usertype(const std::string& name, Args&&... args) {
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global.new_usertype<Class>(name, std::forward<Args>(args)...);
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return *this;
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}
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template<typename Class, typename CTor0, typename... CTor, typename... Args>
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state_view& new_usertype(const std::string& name, Args&&... args) {
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global.new_usertype<Class, CTor0, CTor...>(name, std::forward<Args>(args)...);
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return *this;
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}
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template<typename Class, typename... CArgs, typename... Args>
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state_view& new_usertype(const std::string& name, constructors<CArgs...> ctor, Args&&... args) {
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global.new_usertype<Class>(name, ctor, std::forward<Args>(args)...);
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return *this;
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}
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template<typename Class, typename... Args>
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state_view& new_simple_usertype(const std::string& name, Args&&... args) {
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global.new_simple_usertype<Class>(name, std::forward<Args>(args)...);
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return *this;
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}
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template<typename Class, typename CTor0, typename... CTor, typename... Args>
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state_view& new_simple_usertype(const std::string& name, Args&&... args) {
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global.new_simple_usertype<Class, CTor0, CTor...>(name, std::forward<Args>(args)...);
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return *this;
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}
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template<typename Class, typename... CArgs, typename... Args>
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state_view& new_simple_usertype(const std::string& name, constructors<CArgs...> ctor, Args&&... args) {
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global.new_simple_usertype<Class>(name, ctor, std::forward<Args>(args)...);
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return *this;
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}
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template<bool read_only = true, typename... Args>
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state_view& new_enum(const std::string& name, Args&&... args) {
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global.new_enum<read_only>(name, std::forward<Args>(args)...);
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return *this;
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}
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template <typename Fx>
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void for_each(Fx&& fx) {
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global.for_each(std::forward<Fx>(fx));
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}
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template<typename T>
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proxy<global_table&, T> operator[](T&& key) {
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return global[std::forward<T>(key)];
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}
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template<typename T>
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proxy<const global_table&, T> operator[](T&& key) const {
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return global[std::forward<T>(key)];
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}
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template<typename Sig, typename... Args, typename Key>
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state_view& set_function(Key&& key, Args&&... args) {
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global.set_function<Sig>(std::forward<Key>(key), std::forward<Args>(args)...);
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return *this;
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}
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template<typename... Args, typename Key>
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state_view& set_function(Key&& key, Args&&... args) {
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global.set_function(std::forward<Key>(key), std::forward<Args>(args)...);
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return *this;
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}
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template <typename Name>
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table create_table(Name&& name, int narr = 0, int nrec = 0) {
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return global.create(std::forward<Name>(name), narr, nrec);
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}
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template <typename Name, typename Key, typename Value, typename... Args>
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table create_table(Name&& name, int narr, int nrec, Key&& key, Value&& value, Args&&... args) {
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return global.create(std::forward<Name>(name), narr, nrec, std::forward<Key>(key), std::forward<Value>(value), std::forward<Args>(args)...);
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}
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template <typename Name, typename... Args>
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table create_named_table(Name&& name, Args&&... args) {
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table x = global.create_with(std::forward<Args>(args)...);
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global.set(std::forward<Name>(name), x);
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return x;
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}
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table create_table(int narr = 0, int nrec = 0) {
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return create_table(lua_state(), narr, nrec);
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}
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template <typename Key, typename Value, typename... Args>
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table create_table(int narr, int nrec, Key&& key, Value&& value, Args&&... args) {
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return create_table(lua_state(), narr, nrec, std::forward<Key>(key), std::forward<Value>(value), std::forward<Args>(args)...);
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}
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template <typename... Args>
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table create_table_with(Args&&... args) {
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return create_table_with(lua_state(), std::forward<Args>(args)...);
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}
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static inline table create_table(lua_State* L, int narr = 0, int nrec = 0) {
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return global_table::create(L, narr, nrec);
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}
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template <typename Key, typename Value, typename... Args>
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static inline table create_table(lua_State* L, int narr, int nrec, Key&& key, Value&& value, Args&&... args) {
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return global_table::create(L, narr, nrec, std::forward<Key>(key), std::forward<Value>(value), std::forward<Args>(args)...);
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}
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template <typename... Args>
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static inline table create_table_with(lua_State* L, Args&&... args) {
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return global_table::create_with(L, std::forward<Args>(args)...);
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}
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};
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} // sol
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#endif // SOL_STATE_VIEW_HPP
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