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-// The MIT License (MIT)
-
-// Copyright (c) 2013-2016 Rapptz, ThePhD and contributors
-
-// Permission is hereby granted, free of charge, to any person obtaining a copy of
-// this software and associated documentation files (the "Software"), to deal in
-// the Software without restriction, including without limitation the rights to
-// use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
-// the Software, and to permit persons to whom the Software is furnished to do so,
-// subject to the following conditions:
-
-// The above copyright notice and this permission notice shall be included in all
-// copies or substantial portions of the Software.
-
-// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
-// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
-// FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
-// COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
-// IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
-// CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
-
-#ifndef SOL_STATE_VIEW_HPP
-#define SOL_STATE_VIEW_HPP
-
-#include "error.hpp"
-#include "table.hpp"
-#include "load_result.hpp"
-#include <memory>
-
-namespace sol {
- enum class lib : char {
- base,
- package,
- coroutine,
- string,
- os,
- math,
- table,
- debug,
- bit32,
- io,
- ffi,
- jit,
- utf8,
- count
- };
-
- inline std::size_t total_memory_used(lua_State* L) {
- std::size_t kb = lua_gc(L, LUA_GCCOUNT, 0);
- kb *= 1024;
- kb += lua_gc(L, LUA_GCCOUNTB, 0);
- return kb;
- }
-
- class state_view {
- private:
- lua_State* L;
- table reg;
- global_table global;
-
- optional<object> is_loaded_package(const std::string& key) {
- auto loaded = reg.traverse_get<optional<object>>("_LOADED", key);
- bool is53mod = loaded && !(loaded->is<bool>() && !loaded->as<bool>());
- if (is53mod)
- return loaded;
-#if SOL_LUA_VERSION <= 501
- auto loaded51 = global.traverse_get<optional<object>>("package", "loaded", key);
- bool is51mod = loaded51 && !(loaded51->is<bool>() && !loaded51->as<bool>());
- if (is51mod)
- return loaded51;
-#endif
- return nullopt;
- }
-
- template <typename T>
- void ensure_package(const std::string& key, T&& sr) {
-#if SOL_LUA_VERSION <= 501
- auto pkg = global["package"];
- if (!pkg.valid()) {
- pkg = create_table_with("loaded", create_table_with(key, sr));
- }
- else {
- auto ld = pkg["loaded"];
- if (!ld.valid()) {
- ld = create_table_with(key, sr);
- }
- else {
- ld[key] = sr;
- }
- }
-#endif
- auto loaded = reg["_LOADED"];
- if (!loaded.valid()) {
- loaded = create_table_with(key, sr);
- }
- else {
- loaded[key] = sr;
- }
- }
-
- template <typename Fx>
- object require_core(const std::string& key, Fx&& action, bool create_global = true) {
- optional<object> loaded = is_loaded_package(key);
- if (loaded && loaded->valid())
- return std::move(*loaded);
- action();
- auto sr = stack::get<stack_reference>(L);
- if (create_global)
- set(key, sr);
- ensure_package(key, sr);
- return stack::pop<object>(L);
- }
-
- public:
- typedef global_table::iterator iterator;
- typedef global_table::const_iterator const_iterator;
-
- state_view(lua_State* Ls) :
- L(Ls),
- reg(Ls, LUA_REGISTRYINDEX),
- global(Ls, detail::global_) {
-
- }
-
- state_view(this_state Ls) : state_view(Ls.L){
-
- }
-
- lua_State* lua_state() const {
- return L;
- }
-
- template<typename... Args>
- void open_libraries(Args&&... args) {
- static_assert(meta::all_same<lib, Args...>::value, "all types must be libraries");
- if (sizeof...(args) == 0) {
- luaL_openlibs(L);
- return;
- }
-
- lib libraries[1 + sizeof...(args)] = { lib::count, std::forward<Args>(args)... };
-
- for (auto&& library : libraries) {
- switch (library) {
-#if SOL_LUA_VERSION <= 501 && defined(SOL_LUAJIT)
- case lib::coroutine:
-#endif // luajit opens coroutine base stuff
- case lib::base:
- luaL_requiref(L, "base", luaopen_base, 1);
- lua_pop(L, 1);
- break;
- case lib::package:
- luaL_requiref(L, "package", luaopen_package, 1);
- lua_pop(L, 1);
- break;
-#if !defined(SOL_LUAJIT)
- case lib::coroutine:
-#if SOL_LUA_VERSION > 501
- luaL_requiref(L, "coroutine", luaopen_coroutine, 1);
- lua_pop(L, 1);
-#endif // Lua 5.2+ only
- break;
-#endif // Not LuaJIT - comes builtin
- case lib::string:
- luaL_requiref(L, "string", luaopen_string, 1);
- lua_pop(L, 1);
- break;
- case lib::table:
- luaL_requiref(L, "table", luaopen_table, 1);
- lua_pop(L, 1);
- break;
- case lib::math:
- luaL_requiref(L, "math", luaopen_math, 1);
- lua_pop(L, 1);
- break;
- case lib::bit32:
-#ifdef SOL_LUAJIT
- luaL_requiref(L, "bit32", luaopen_bit, 1);
- lua_pop(L, 1);
-#elif (SOL_LUA_VERSION == 502) || defined(LUA_COMPAT_BITLIB) || defined(LUA_COMPAT_5_2)
- luaL_requiref(L, "bit32", luaopen_bit32, 1);
- lua_pop(L, 1);
-#else
-#endif // Lua 5.2 only (deprecated in 5.3 (503)) (Can be turned on with Compat flags)
- break;
- case lib::io:
- luaL_requiref(L, "io", luaopen_io, 1);
- lua_pop(L, 1);
- break;
- case lib::os:
- luaL_requiref(L, "os", luaopen_os, 1);
- lua_pop(L, 1);
- break;
- case lib::debug:
- luaL_requiref(L, "debug", luaopen_debug, 1);
- lua_pop(L, 1);
- break;
- case lib::utf8:
-#if SOL_LUA_VERSION > 502 && !defined(SOL_LUAJIT)
- luaL_requiref(L, "utf8", luaopen_utf8, 1);
- lua_pop(L, 1);
-#endif // Lua 5.3+ only
- break;
- case lib::ffi:
-#ifdef SOL_LUAJIT
- luaL_requiref(L, "ffi", luaopen_ffi, 1);
- lua_pop(L, 1);
-#endif // LuaJIT only
- break;
- case lib::jit:
-#ifdef SOL_LUAJIT
- luaL_requiref(L, "jit", luaopen_jit, 1);
- lua_pop(L, 1);
-#endif // LuaJIT Only
- break;
- case lib::count:
- default:
- break;
- }
- }
- }
-
- object require(const std::string& key, lua_CFunction open_function, bool create_global = true) {
- luaL_requiref(L, key.c_str(), open_function, create_global ? 1 : 0);
- return stack::pop<object>(L);
- }
-
- object require_script(const std::string& key, const std::string& code, bool create_global = true) {
- return require_core(key, [this, &code]() {stack::script(L, code); }, create_global);
- }
-
- object require_file(const std::string& key, const std::string& filename, bool create_global = true) {
- return require_core(key, [this, &filename]() {stack::script_file(L, filename); }, create_global);
- }
-
- protected_function_result do_string(const std::string& code) {
- sol::protected_function pf = load(code);
- return pf();
- }
-
- protected_function_result do_file(const std::string& filename) {
- sol::protected_function pf = load_file(filename);
- return pf();
- }
-
- function_result script(const std::string& code) {
- int index = lua_gettop(L);
- stack::script(L, code);
- int postindex = lua_gettop(L);
- int returns = postindex - index;
- return function_result(L, (std::max)(postindex - (returns - 1), 1), returns);
- }
-
- function_result script_file(const std::string& filename) {
- int index = lua_gettop(L);
- stack::script_file(L, filename);
- int postindex = lua_gettop(L);
- int returns = postindex - index;
- return function_result(L, (std::max)(postindex - (returns - 1), 1), returns);
- }
-
- load_result load(const std::string& code) {
- load_status x = static_cast<load_status>(luaL_loadstring(L, code.c_str()));
- return load_result(L, lua_absindex(L, -1), 1, 1, x);
- }
-
- load_result load_file(const std::string& filename) {
- load_status x = static_cast<load_status>(luaL_loadfile(L, filename.c_str()));
- return load_result(L, lua_absindex(L, -1), 1, 1, x);
- }
-
- load_result load_buffer(const char *buff, size_t size, const char *name, const char* mode = nullptr) {
- load_status x = static_cast<load_status>(luaL_loadbufferx(L, buff, size, name, mode));
- return load_result(L, lua_absindex(L, -1), 1, 1, x);
- }
-
- iterator begin() const {
- return global.begin();
- }
-
- iterator end() const {
- return global.end();
- }
-
- const_iterator cbegin() const {
- return global.cbegin();
- }
-
- const_iterator cend() const {
- return global.cend();
- }
-
- global_table globals() const {
- return global;
- }
-
- table registry() const {
- return reg;
- }
-
- std::size_t memory_used() const {
- return total_memory_used(lua_state());
- }
-
- void collect_garbage() {
- lua_gc(lua_state(), LUA_GCCOLLECT, 0);
- }
-
- operator lua_State* () const {
- return lua_state();
- }
-
- void set_panic(lua_CFunction panic) {
- lua_atpanic(L, panic);
- }
-
- template<typename... Args, typename... Keys>
- decltype(auto) get(Keys&&... keys) const {
- return global.get<Args...>(std::forward<Keys>(keys)...);
- }
-
- template<typename T, typename Key>
- decltype(auto) get_or(Key&& key, T&& otherwise) const {
- return global.get_or(std::forward<Key>(key), std::forward<T>(otherwise));
- }
-
- template<typename T, typename Key, typename D>
- decltype(auto) get_or(Key&& key, D&& otherwise) const {
- return global.get_or<T>(std::forward<Key>(key), std::forward<D>(otherwise));
- }
-
- template<typename... Args>
- state_view& set(Args&&... args) {
- global.set(std::forward<Args>(args)...);
- return *this;
- }
-
- template<typename T, typename... Keys>
- decltype(auto) traverse_get(Keys&&... keys) const {
- return global.traverse_get<T>(std::forward<Keys>(keys)...);
- }
-
- template<typename... Args>
- state_view& traverse_set(Args&&... args) {
- global.traverse_set(std::forward<Args>(args)...);
- return *this;
- }
-
- template<typename T>
- state_view& set_usertype(usertype<T>& user) {
- return set_usertype(usertype_traits<T>::name(), user);
- }
-
- template<typename Key, typename T>
- state_view& set_usertype(Key&& key, usertype<T>& user) {
- global.set_usertype(std::forward<Key>(key), user);
- return *this;
- }
-
- template<typename Class, typename... Args>
- state_view& new_usertype(const std::string& name, Args&&... args) {
- global.new_usertype<Class>(name, std::forward<Args>(args)...);
- return *this;
- }
-
- template<typename Class, typename CTor0, typename... CTor, typename... Args>
- state_view& new_usertype(const std::string& name, Args&&... args) {
- global.new_usertype<Class, CTor0, CTor...>(name, std::forward<Args>(args)...);
- return *this;
- }
-
- template<typename Class, typename... CArgs, typename... Args>
- state_view& new_usertype(const std::string& name, constructors<CArgs...> ctor, Args&&... args) {
- global.new_usertype<Class>(name, ctor, std::forward<Args>(args)...);
- return *this;
- }
-
- template<typename Class, typename... Args>
- state_view& new_simple_usertype(const std::string& name, Args&&... args) {
- global.new_simple_usertype<Class>(name, std::forward<Args>(args)...);
- return *this;
- }
-
- template<typename Class, typename CTor0, typename... CTor, typename... Args>
- state_view& new_simple_usertype(const std::string& name, Args&&... args) {
- global.new_simple_usertype<Class, CTor0, CTor...>(name, std::forward<Args>(args)...);
- return *this;
- }
-
- template<typename Class, typename... CArgs, typename... Args>
- state_view& new_simple_usertype(const std::string& name, constructors<CArgs...> ctor, Args&&... args) {
- global.new_simple_usertype<Class>(name, ctor, std::forward<Args>(args)...);
- return *this;
- }
-
- template<typename Class, typename... Args>
- simple_usertype<Class> create_simple_usertype(Args&&... args) {
- return global.create_simple_usertype<Class>(std::forward<Args>(args)...);
- }
-
- template<typename Class, typename CTor0, typename... CTor, typename... Args>
- simple_usertype<Class> create_simple_usertype(Args&&... args) {
- return global.create_simple_usertype<Class, CTor0, CTor...>(std::forward<Args>(args)...);
- }
-
- template<typename Class, typename... CArgs, typename... Args>
- simple_usertype<Class> create_simple_usertype(constructors<CArgs...> ctor, Args&&... args) {
- return global.create_simple_usertype<Class>(ctor, std::forward<Args>(args)...);
- }
-
- template<bool read_only = true, typename... Args>
- state_view& new_enum(const std::string& name, Args&&... args) {
- global.new_enum<read_only>(name, std::forward<Args>(args)...);
- return *this;
- }
-
- template <typename Fx>
- void for_each(Fx&& fx) {
- global.for_each(std::forward<Fx>(fx));
- }
-
- template<typename T>
- proxy<global_table&, T> operator[](T&& key) {
- return global[std::forward<T>(key)];
- }
-
- template<typename T>
- proxy<const global_table&, T> operator[](T&& key) const {
- return global[std::forward<T>(key)];
- }
-
- template<typename Sig, typename... Args, typename Key>
- state_view& set_function(Key&& key, Args&&... args) {
- global.set_function<Sig>(std::forward<Key>(key), std::forward<Args>(args)...);
- return *this;
- }
-
- template<typename... Args, typename Key>
- state_view& set_function(Key&& key, Args&&... args) {
- global.set_function(std::forward<Key>(key), std::forward<Args>(args)...);
- return *this;
- }
-
- template <typename Name>
- table create_table(Name&& name, int narr = 0, int nrec = 0) {
- return global.create(std::forward<Name>(name), narr, nrec);
- }
-
- template <typename Name, typename Key, typename Value, typename... Args>
- table create_table(Name&& name, int narr, int nrec, Key&& key, Value&& value, Args&&... args) {
- return global.create(std::forward<Name>(name), narr, nrec, std::forward<Key>(key), std::forward<Value>(value), std::forward<Args>(args)...);
- }
-
- template <typename Name, typename... Args>
- table create_named_table(Name&& name, Args&&... args) {
- table x = global.create_with(std::forward<Args>(args)...);
- global.set(std::forward<Name>(name), x);
- return x;
- }
-
- table create_table(int narr = 0, int nrec = 0) {
- return create_table(lua_state(), narr, nrec);
- }
-
- template <typename Key, typename Value, typename... Args>
- table create_table(int narr, int nrec, Key&& key, Value&& value, Args&&... args) {
- return create_table(lua_state(), narr, nrec, std::forward<Key>(key), std::forward<Value>(value), std::forward<Args>(args)...);
- }
-
- template <typename... Args>
- table create_table_with(Args&&... args) {
- return create_table_with(lua_state(), std::forward<Args>(args)...);
- }
-
- static inline table create_table(lua_State* L, int narr = 0, int nrec = 0) {
- return global_table::create(L, narr, nrec);
- }
-
- template <typename Key, typename Value, typename... Args>
- static inline table create_table(lua_State* L, int narr, int nrec, Key&& key, Value&& value, Args&&... args) {
- return global_table::create(L, narr, nrec, std::forward<Key>(key), std::forward<Value>(value), std::forward<Args>(args)...);
- }
-
- template <typename... Args>
- static inline table create_table_with(lua_State* L, Args&&... args) {
- return global_table::create_with(L, std::forward<Args>(args)...);
- }
- };
-} // sol
-
-#endif // SOL_STATE_VIEW_HPP