mirror of
https://github.com/ThePhD/sol2.git
synced 2024-03-22 13:10:44 +08:00
280 lines
10 KiB
C++
280 lines
10 KiB
C++
// The MIT License (MIT)
|
|
|
|
// Copyright (c) 2013 Danny Y., Rapptz
|
|
|
|
// 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_LUA_FUNC_HPP
|
|
#define SOL_LUA_FUNC_HPP
|
|
|
|
#include "functional.hpp"
|
|
#include "stack.hpp"
|
|
#include <memory>
|
|
|
|
namespace sol {
|
|
namespace detail {
|
|
template<typename T, std::size_t n>
|
|
void get_upvalue_ptr(lua_State* L, T*& data, std::size_t datasize, std::array<void*, n> voiddata, int& upvalue) {
|
|
for (std::size_t i = 0, d = 0; d < datasize; ++i, d += sizeof(void*)) {
|
|
voiddata[ i ] = lua_touserdata(L, lua_upvalueindex(upvalue++));
|
|
}
|
|
data = reinterpret_cast<T*>(static_cast<void*>(voiddata.data()));
|
|
}
|
|
template<typename T, std::size_t n>
|
|
void get_upvalue_ptr(lua_State* L, T*& data, std::array<void*, n> voiddata, int& upvalue) {
|
|
get_upvalue_ptr(L, data, sizeof(T), voiddata, upvalue);
|
|
}
|
|
template<typename T>
|
|
void get_upvalue_ptr(lua_State* L, T*& data, int& upvalue) {
|
|
const static std::size_t data_t_count = (sizeof(T)+(sizeof(void*)-1)) / sizeof(void*);
|
|
typedef std::array<void*, data_t_count> data_t;
|
|
data_t voiddata{{}};
|
|
return get_upvalue_ptr(L, data, voiddata, upvalue);
|
|
}
|
|
template<typename T>
|
|
void get_upvalue(lua_State* L, T& data, int& upvalue) {
|
|
const static std::size_t data_t_count = (sizeof(T)+(sizeof(void*)-1)) / sizeof(void*);
|
|
typedef std::array<void*, data_t_count> data_t;
|
|
data_t voiddata{ { } };
|
|
for (std::size_t i = 0, d = 0; d < sizeof(T); ++i, d += sizeof(void*)) {
|
|
voiddata[ i ] = lua_touserdata(L, lua_upvalueindex(upvalue++));
|
|
}
|
|
data = *reinterpret_cast<T*>(static_cast<void*>(voiddata.data()));
|
|
}
|
|
} // detail
|
|
|
|
|
|
template<typename TFx>
|
|
struct static_lua_func {
|
|
typedef typename std::remove_pointer<typename std::decay<TFx>::type>::type fx_t;
|
|
typedef detail::function_traits<fx_t> fx_traits;
|
|
|
|
template<typename... Args>
|
|
static int typed_call(types<void>, types<Args...> t, fx_t* fx, lua_State* L) {
|
|
stack::pop_call(L, fx, t);
|
|
return 0;
|
|
}
|
|
|
|
template<typename... TRn, typename... Args>
|
|
static int typed_call(types<TRn...>, types<Args...> t, fx_t* fx, lua_State* L) {
|
|
auto r = stack::pop_call(L, fx, t);
|
|
stack::push(L, std::move(r));
|
|
return sizeof...(TRn);
|
|
}
|
|
|
|
static int call(lua_State* L) {
|
|
int upvalue = 1;
|
|
fx_t* fx;
|
|
detail::get_upvalue(L, fx, upvalue);
|
|
int r = typed_call(tuple_types<typename fx_traits::return_type>(), typename fx_traits::args_type(), fx, L);
|
|
return r;
|
|
}
|
|
|
|
int operator()(lua_State* L) {
|
|
return call(L);
|
|
}
|
|
};
|
|
|
|
template<typename T, typename TFx>
|
|
struct static_object_lua_func {
|
|
typedef typename std::decay<TFx>::type fx_t;
|
|
typedef detail::function_traits<fx_t> fx_traits;
|
|
|
|
template<typename... Args>
|
|
static int typed_call(types<void>, types<Args...>, T& item, fx_t& ifx, lua_State* L) {
|
|
auto fx = [ &item, &ifx ] (Args&&... args) { (item.*ifx)(std::forward<Args>(args)...); };
|
|
stack::pop_call(L, fx, types<Args...>());
|
|
return 0;
|
|
}
|
|
|
|
template<typename TR, typename... Args>
|
|
static int typed_call(types<TR>, types<Args...>, T& item, fx_t& ifx, lua_State* L) {
|
|
auto fx = [ &item, &ifx ] (Args&&... args) -> TR {
|
|
return (item.*ifx)(std::forward<Args>(args)...);
|
|
};
|
|
auto r = stack::pop_call(L, fx, types<Args...>());
|
|
stack::push(L, std::move(r));
|
|
return 1;
|
|
}
|
|
|
|
template<typename... TRn, typename... Args>
|
|
static int typed_call(types<TRn...>, types<Args...>, T& item, fx_t& ifx, lua_State* L) {
|
|
auto fx = [ &item, &ifx ] (Args&&... args) -> std::tuple<TRn...> { return (item.*ifx)(std::forward<Args>(args)...); };
|
|
auto r = stack::pop_call(L, fx, types<Args...>());
|
|
stack::push(L, std::move(r));
|
|
return sizeof...(TRn);
|
|
}
|
|
|
|
static int call(lua_State* L) {
|
|
const static std::size_t data_t_count = (sizeof(fx_t)+(sizeof(void*)-1)) / sizeof(void*);
|
|
typedef std::array<void*, data_t_count> data_t;
|
|
int upvalue = 1;
|
|
data_t data = { { } };
|
|
fx_t* fxptr;
|
|
for (std::size_t i = 0, d = 0; d < sizeof(fx_t*); ++i, d += sizeof(void*)) {
|
|
data[ i ] = lua_touserdata(L, lua_upvalueindex(upvalue++));
|
|
}
|
|
fxptr = reinterpret_cast<fx_t*>(static_cast<void*>(data.data()));
|
|
fx_t& mem_ptr = *fxptr;
|
|
void* objectdata = lua_touserdata(L, lua_upvalueindex(upvalue++));
|
|
T& obj = *static_cast<T*>(objectdata);
|
|
int r = typed_call(tuple_types<typename fx_traits::return_type>(), typename fx_traits::args_type(), obj, mem_ptr, L);
|
|
return r;
|
|
}
|
|
|
|
int operator()(lua_State* L) {
|
|
return call(L);
|
|
}
|
|
};
|
|
|
|
struct lua_func {
|
|
static int call(lua_State* L) {
|
|
void** pinheritancedata = static_cast<void**>(lua_touserdata(L, lua_upvalueindex(1)));
|
|
void* inheritancedata = *pinheritancedata;
|
|
if (inheritancedata == nullptr)
|
|
throw sol_error("call from lua to c++ function has null data");
|
|
lua_func* pfx = static_cast<lua_func*>(inheritancedata);
|
|
lua_func& fx = *pfx;
|
|
int r = fx(L);
|
|
return r;
|
|
}
|
|
|
|
static int gc(lua_State* L) {
|
|
void** puserdata = static_cast<void**>(lua_touserdata(L, 1));
|
|
void* userdata = *puserdata;
|
|
lua_func* ptr = static_cast<lua_func*>(userdata);
|
|
std::default_delete<lua_func> dx{};
|
|
dx(ptr);
|
|
return 0;
|
|
}
|
|
|
|
virtual int operator()(lua_State*) {
|
|
throw sol_error("Failure to call specialized wrapped C++ function from lua");
|
|
}
|
|
|
|
virtual ~lua_func() {};
|
|
};
|
|
|
|
template<typename TFx>
|
|
struct lambda_lua_func : public lua_func {
|
|
typedef decltype(&TFx::operator()) fx_t;
|
|
typedef detail::function_traits<fx_t> fx_traits;
|
|
TFx fx;
|
|
|
|
template<typename... FxArgs>
|
|
lambda_lua_func(FxArgs&&... fxargs): fx(std::forward<FxArgs>(fxargs)...) {}
|
|
|
|
virtual int operator()(lua_State* L) override {
|
|
return (*this)(tuple_types<typename fx_traits::return_type>(), typename fx_traits::args_type(), L);
|
|
}
|
|
|
|
template<typename... Args>
|
|
int operator()(types<void>, types<Args...> t, lua_State* L) {
|
|
stack::pop_call(L, fx, t);
|
|
return 0;
|
|
}
|
|
|
|
template<typename... TRn, typename... Args>
|
|
int operator()(types<TRn...>, types<Args...> t, lua_State* L) {
|
|
auto r = stack::pop_call(L, fx, t);
|
|
stack::push(L, r);
|
|
return sizeof...(TRn);
|
|
}
|
|
|
|
~lambda_lua_func() {
|
|
|
|
}
|
|
};
|
|
|
|
template<typename TFx, typename T = TFx, bool is_member_pointer = std::is_member_function_pointer<TFx>::value>
|
|
struct explicit_lua_func : public lua_func {
|
|
typedef typename std::remove_pointer<typename std::decay<TFx>::type>::type fx_t;
|
|
typedef detail::function_traits<fx_t> fx_traits;
|
|
TFx fx;
|
|
|
|
template<typename... FxArgs>
|
|
explicit_lua_func(FxArgs&&... fxargs): fx(std::forward<FxArgs>(fxargs)...) {}
|
|
|
|
virtual int operator()(lua_State* L) override {
|
|
return (*this)(tuple_types<typename fx_traits::return_type>(), typename fx_traits::args_type(), L);
|
|
}
|
|
|
|
template<typename... Args>
|
|
int operator()(types<void>, types<Args...> t, lua_State* L) {
|
|
stack::pop_call(L, fx, t);
|
|
return 0;
|
|
}
|
|
|
|
template<typename... TRn, typename... Args>
|
|
int operator()(types<TRn...>, types<Args...> t, lua_State* L) {
|
|
auto r = stack::pop_call(L, fx, t);
|
|
stack::push(L, std::move(r));
|
|
return sizeof...(TRn);
|
|
}
|
|
|
|
~explicit_lua_func() {
|
|
|
|
}
|
|
};
|
|
|
|
template<typename TFx, typename T>
|
|
struct explicit_lua_func<TFx, T, true> : public lua_func {
|
|
typedef typename std::remove_pointer<typename std::decay<TFx>::type>::type fx_t;
|
|
typedef detail::function_traits<fx_t> fx_traits;
|
|
struct lambda {
|
|
T member;
|
|
TFx invocation;
|
|
|
|
template<typename... FxArgs>
|
|
lambda(T m, FxArgs&&... fxargs): member(std::move(m)), invocation(std::forward<FxArgs>(fxargs)...) {}
|
|
|
|
template<typename... Args>
|
|
typename fx_traits::return_type operator()(Args&&... args) {
|
|
return (member.*invocation)(std::forward<Args>(args)...);
|
|
}
|
|
} fx;
|
|
|
|
template<typename... FxArgs>
|
|
explicit_lua_func(T m, FxArgs&&... fxargs): fx(std::move(m), std::forward<FxArgs>(fxargs)...) {}
|
|
|
|
virtual int operator()(lua_State* L) override {
|
|
return (*this)(tuple_types<typename fx_traits::return_type>(), typename fx_traits::args_type(), L);
|
|
}
|
|
|
|
template<typename... Args>
|
|
int operator()(types<void>, types<Args...> t, lua_State* L) {
|
|
stack::pop_call(L, fx, t);
|
|
return 0;
|
|
}
|
|
|
|
template<typename... TRn, typename... Args>
|
|
int operator()(types<TRn...>, types<Args...> t, lua_State* L) {
|
|
auto r = stack::pop_call(L, fx, t);
|
|
stack::push(L, r);
|
|
return sizeof...(TRn);
|
|
}
|
|
|
|
~explicit_lua_func() {
|
|
|
|
}
|
|
};
|
|
|
|
} // sol
|
|
|
|
#endif // SOL_LUA_FUNC_HPP
|