mirror of
https://github.com/vcmi/vcmi.git
synced 2024-12-28 23:06:24 +02:00
365 lines
7.3 KiB
C++
365 lines
7.3 KiB
C++
/*
|
|
* LuaStack.h, part of VCMI engine
|
|
*
|
|
* Authors: listed in file AUTHORS in main folder
|
|
*
|
|
* License: GNU General Public License v2.0 or later
|
|
* Full text of license available in license.txt file, in main folder
|
|
*
|
|
*/
|
|
|
|
#pragma once
|
|
|
|
#include "api/Registry.h"
|
|
#include "../../lib/GameConstants.h"
|
|
|
|
class JsonNode;
|
|
class int3;
|
|
|
|
namespace scripting
|
|
{
|
|
|
|
namespace detail
|
|
{
|
|
template<typename T>
|
|
struct IsRegularClass
|
|
{
|
|
static constexpr auto value = std::is_class<T>::value && !std::is_base_of<IdTag, T>::value;
|
|
};
|
|
|
|
template<typename T>
|
|
struct IsIdClass
|
|
{
|
|
static constexpr auto value = std::is_class<T>::value && std::is_base_of<IdTag, T>::value;
|
|
};
|
|
}
|
|
|
|
class LuaStack
|
|
{
|
|
public:
|
|
LuaStack(lua_State * L_);
|
|
void balance();
|
|
void clear();
|
|
|
|
void pushByIndex(lua_Integer index);
|
|
|
|
void pushNil();
|
|
void pushInteger(lua_Integer value);
|
|
void push(bool value);
|
|
void push(const char * value);
|
|
void push(const std::string & value);
|
|
void push(const JsonNode & value);
|
|
|
|
template<typename T>
|
|
void push(const boost::optional<T> & value)
|
|
{
|
|
if(value.is_initialized())
|
|
push(value.get());
|
|
else
|
|
pushNil();
|
|
}
|
|
|
|
template<typename T, typename std::enable_if< std::is_integral<T>::value && !std::is_same<T, bool>::value, int>::type = 0>
|
|
void push(const T value)
|
|
{
|
|
pushInteger(static_cast<lua_Integer>(value));
|
|
}
|
|
|
|
template<typename T, typename std::enable_if< std::is_enum<T>::value, int>::type = 0>
|
|
void push(const T value)
|
|
{
|
|
pushInteger(static_cast<lua_Integer>(value));
|
|
}
|
|
|
|
void push(const int3 & value);
|
|
|
|
template<typename T, typename std::enable_if< detail::IsIdClass<T>::value, int>::type = 0>
|
|
void push(const T & value)
|
|
{
|
|
pushInteger(static_cast<lua_Integer>(value.toEnum()));
|
|
}
|
|
|
|
template<typename T, typename std::enable_if<detail::IsRegularClass<T>::value, int>::type = 0>
|
|
void push(T * value)
|
|
{
|
|
using UData = T *;
|
|
static auto KEY = api::TypeRegistry::get()->getKey<UData>();
|
|
|
|
if(!value)
|
|
{
|
|
pushNil();
|
|
return;
|
|
}
|
|
|
|
void * raw = lua_newuserdata(L, sizeof(UData));
|
|
if(!raw)
|
|
{
|
|
pushNil();
|
|
return;
|
|
}
|
|
|
|
UData * ptr = static_cast<UData *>(raw);
|
|
*ptr = value;
|
|
|
|
luaL_getmetatable(L, KEY);
|
|
lua_setmetatable(L, -2);
|
|
}
|
|
|
|
template<typename T, typename std::enable_if<detail::IsRegularClass<T>::value, int>::type = 0>
|
|
void push(std::shared_ptr<T> value)
|
|
{
|
|
using UData = std::shared_ptr<T>;
|
|
static auto KEY = api::TypeRegistry::get()->getKey<UData>();
|
|
|
|
if(!value)
|
|
{
|
|
pushNil();
|
|
return;
|
|
}
|
|
|
|
void * raw = lua_newuserdata(L, sizeof(UData));
|
|
|
|
if(!raw)
|
|
{
|
|
pushNil();
|
|
return;
|
|
}
|
|
|
|
new(raw) UData(value);
|
|
|
|
luaL_getmetatable(L, KEY);
|
|
lua_setmetatable(L, -2);
|
|
}
|
|
|
|
template<typename T, typename std::enable_if<detail::IsRegularClass<T>::value, int>::type = 0>
|
|
void push(std::unique_ptr<T> && value)
|
|
{
|
|
using UData = std::unique_ptr<T>;
|
|
static auto KEY = api::TypeRegistry::get()->getKey<UData>();
|
|
|
|
if(!value)
|
|
{
|
|
pushNil();
|
|
return;
|
|
}
|
|
|
|
void * raw = lua_newuserdata(L, sizeof(UData));
|
|
|
|
if(!raw)
|
|
{
|
|
pushNil();
|
|
return;
|
|
}
|
|
|
|
new(raw) UData(std::move(value));
|
|
|
|
luaL_getmetatable(L, KEY);
|
|
lua_setmetatable(L, -2);
|
|
}
|
|
|
|
bool tryGetInteger(int position, lua_Integer & value);
|
|
|
|
bool tryGet(int position, bool & value);
|
|
|
|
template<typename T, typename std::enable_if< std::is_integral<T>::value && !std::is_same<T, bool>::value, int>::type = 0>
|
|
bool tryGet(int position, T & value)
|
|
{
|
|
lua_Integer temp;
|
|
if(tryGetInteger(position, temp))
|
|
{
|
|
value = static_cast<T>(temp);
|
|
return true;
|
|
}
|
|
else
|
|
{
|
|
return false;
|
|
}
|
|
}
|
|
|
|
template<typename T, typename std::enable_if<detail::IsIdClass<T>::value, int>::type = 0>
|
|
bool tryGet(int position, T & value)
|
|
{
|
|
lua_Integer temp;
|
|
if(tryGetInteger(position, temp))
|
|
{
|
|
value = T(temp);
|
|
return true;
|
|
}
|
|
else
|
|
{
|
|
return false;
|
|
}
|
|
}
|
|
|
|
template<typename T, typename std::enable_if< std::is_enum<T>::value, int>::type = 0>
|
|
bool tryGet(int position, T & value)
|
|
{
|
|
lua_Integer temp;
|
|
if(tryGetInteger(position, temp))
|
|
{
|
|
value = static_cast<T>(temp);
|
|
return true;
|
|
}
|
|
else
|
|
{
|
|
return false;
|
|
}
|
|
}
|
|
|
|
bool tryGet(int position, int3 & value);
|
|
|
|
bool tryGet(int position, double & value);
|
|
bool tryGet(int position, std::string & value);
|
|
|
|
template<typename T, typename std::enable_if<detail::IsRegularClass<T>::value && std::is_const<T>::value, int>::type = 0>
|
|
STRONG_INLINE bool tryGet(int position, T * & value)
|
|
{
|
|
using NCValue = typename std::remove_const<T>::type;
|
|
|
|
using UData = NCValue *;
|
|
using CUData = T *;
|
|
|
|
return tryGetCUData<T *, UData, CUData>(position, value);
|
|
}
|
|
|
|
template<typename T, typename std::enable_if<detail::IsRegularClass<T>::value && !std::is_const<T>::value, int>::type = 0>
|
|
STRONG_INLINE bool tryGet(int position, T * & value)
|
|
{
|
|
return tryGetUData<T *>(position, value);
|
|
}
|
|
|
|
template<typename T, typename std::enable_if<detail::IsRegularClass<T>::value && std::is_const<T>::value, int>::type = 0>
|
|
STRONG_INLINE bool tryGet(int position, std::shared_ptr<T> & value)
|
|
{
|
|
using NCValue = typename std::remove_const<T>::type;
|
|
|
|
using UData = std::shared_ptr<NCValue>;
|
|
using CUData = std::shared_ptr<T>;
|
|
|
|
return tryGetCUData<std::shared_ptr<T>, UData, CUData>(position, value);
|
|
}
|
|
|
|
template<typename T, typename std::enable_if<detail::IsRegularClass<T>::value && !std::is_const<T>::value, int>::type = 0>
|
|
STRONG_INLINE bool tryGet(int position, std::shared_ptr<T> & value)
|
|
{
|
|
return tryGetUData<std::shared_ptr<T>>(position, value);
|
|
}
|
|
|
|
template<typename U>
|
|
bool tryGetUData(int position, U & value)
|
|
{
|
|
static auto KEY = api::TypeRegistry::get()->getKey<U>();
|
|
|
|
void * raw = lua_touserdata(L, position);
|
|
|
|
if(!raw)
|
|
return false;
|
|
|
|
if(lua_getmetatable(L, position) == 0)
|
|
return false;
|
|
|
|
lua_getfield(L, LUA_REGISTRYINDEX, KEY);
|
|
|
|
if(lua_rawequal(L, -1, -2) == 1)
|
|
{
|
|
value = *(static_cast<U *>(raw));
|
|
lua_pop(L, 2);
|
|
return true;
|
|
}
|
|
|
|
lua_pop(L, 2);
|
|
return false;
|
|
}
|
|
|
|
template<typename T, typename U, typename CU>
|
|
bool tryGetCUData(int position, T & value)
|
|
{
|
|
static auto KEY = api::TypeRegistry::get()->getKey<U>();
|
|
static auto C_KEY = api::TypeRegistry::get()->getKey<CU>();
|
|
|
|
void * raw = lua_touserdata(L, position);
|
|
|
|
if(!raw)
|
|
return false;
|
|
|
|
if(lua_getmetatable(L, position) == 0)
|
|
return false;
|
|
|
|
//top is metatable
|
|
|
|
lua_getfield(L, LUA_REGISTRYINDEX, KEY);
|
|
|
|
if(lua_rawequal(L, -1, -2) == 1)
|
|
{
|
|
value = *(static_cast<U *>(raw));
|
|
lua_pop(L, 2);
|
|
return true;
|
|
}
|
|
|
|
lua_pop(L, 1);
|
|
|
|
//top is metatable
|
|
|
|
lua_getfield(L, LUA_REGISTRYINDEX, C_KEY);
|
|
|
|
if(lua_rawequal(L, -1, -2) == 1)
|
|
{
|
|
value = *(static_cast<CU *>(raw));
|
|
lua_pop(L, 2);
|
|
return true;
|
|
}
|
|
|
|
lua_pop(L, 2);
|
|
return false;
|
|
}
|
|
|
|
bool tryGet(int position, JsonNode & value);
|
|
|
|
int retNil();
|
|
int retVoid();
|
|
|
|
STRONG_INLINE
|
|
int retPushed()
|
|
{
|
|
return lua_gettop(L);
|
|
}
|
|
|
|
inline bool isFunction(int position)
|
|
{
|
|
return lua_isfunction(L, position);
|
|
}
|
|
|
|
inline bool isNumber(int position)
|
|
{
|
|
return lua_isnumber(L, position);
|
|
}
|
|
|
|
static int quickRetBool(lua_State * L, bool value)
|
|
{
|
|
lua_settop(L, 0);
|
|
lua_pushboolean(L, value);
|
|
return 1;
|
|
}
|
|
|
|
template<typename T>
|
|
static int quickRetInt(lua_State * L, const T & value)
|
|
{
|
|
lua_settop(L, 0);
|
|
lua_pushinteger(L, static_cast<int32_t>(value));
|
|
return 1;
|
|
}
|
|
|
|
static int quickRetStr(lua_State * L, const std::string & value)
|
|
{
|
|
lua_settop(L, 0);
|
|
lua_pushlstring(L, value.c_str(), value.size());
|
|
return 1;
|
|
}
|
|
|
|
private:
|
|
lua_State * L;
|
|
int initialTop;
|
|
};
|
|
|
|
}
|