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LuaStack.inl
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LuaStack.inl
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// Copyright � 2013 Tom Tondeur
//
// This file is part of LuaLink.
//
// LuaLink is free software: you can redistribute it and/or modify
// it under the terms of the GNU Lesser General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// LuaLink is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU Lesser General Public License for more details.
//
// You should have received a copy of the GNU Lesser General Public License
// along with LuaLink. If not, see <http://www.gnu.org/licenses/>.
namespace LuaLink
{
//Partial specialization for LuaStack::Implementation_pushStack
template<typename H, typename... T>
struct LuaStack::Implementation_pushStack<H, T...>{
static void pushStack(lua_State* pLua, H data, T... tailData)
{
pushVariable<H>(pLua, data);
pushStack(pLua, tailData...);
}
};
template<typename T>
struct LuaStack::Implementation_pushStack<T>{
static void pushStack(lua_State* pLua, T data)
{
pushVariable<T>(pLua, data);
}
};
template<>
struct LuaStack::Implementation_pushStack<>{
static void pushStack(lua_State* pLua) { }
};
template<typename... T>
void LuaStack::pushStack(lua_State* pLua, T... data)
{
Implementation_pushStack<T...>::pushStack(pLua, data...);
}
}
#ifdef LUALINK_DEFINE
#include <string>
namespace LuaLink {
//getVariable (safe version)
template<>
std::string LuaStack::getVariable<std::string>(lua_State* pLua, int varIdx, bool& isOk)
{
const char* str = lua_tostring(pLua, varIdx);
isOk = str != nullptr;
return std::string(str);
}
template<>
int LuaStack::getVariable<int>(lua_State* pLua, int varIdx, bool& isOk)
{
int isnum;
lua_Integer i = lua_tointegerx(pLua, varIdx, &isnum);
isOk = isnum != 0;
return static_cast<int>(i);
}
template<>
unsigned int LuaStack::getVariable<unsigned int>(lua_State* pLua, int varIdx, bool& isOk)
{
int isnum;
lua_Unsigned u = (lua_Unsigned)lua_tointegerx(pLua, varIdx, &isnum);
isOk = isnum != 0;
return static_cast<unsigned int>(u);
}
template<>
bool LuaStack::getVariable<bool>(lua_State* pLua, int varIdx, bool& isOk)
{
isOk = lua_isboolean(pLua, varIdx) != 0;
if(isOk)
return lua_toboolean(pLua, varIdx) == 0 ? false : true;
return false;
}
template<>
double LuaStack::getVariable<double>(lua_State* pLua, int varIdx, bool& isOk)
{
int isnum;
lua_Number d = lua_tonumberx(pLua, varIdx, &isnum);
isOk = isnum != 0;
return static_cast<double>(d);
}
template<>
void* LuaStack::getVariable<void*>(lua_State* pLua, int varIdx, bool& isOk)
{
isOk = lua_isuserdata(pLua, varIdx) != 0;
return lua_touserdata(pLua, varIdx);
}
//getVariable (no checking)
template<>
std::string LuaStack::getVariable<std::string>(lua_State* pLua, int varIdx)
{
const char* str = lua_tostring(pLua, varIdx);
return std::string(str);
}
template<>
int LuaStack::getVariable<int>(lua_State* pLua, int varIdx)
{
return static_cast<int>(lua_tointeger(pLua, varIdx));
}
template<>
unsigned int LuaStack::getVariable<unsigned int>(lua_State* pLua, int varIdx)
{
return static_cast<unsigned int>(lua_tointeger(pLua, varIdx));
}
template<>
bool LuaStack::getVariable<bool>(lua_State* pLua, int varIdx)
{
return lua_toboolean(pLua, varIdx) == 0 ? false : true;
}
template<>
double LuaStack::getVariable<double>(lua_State* pLua, int varIdx)
{
lua_Number d = lua_tonumber(pLua, varIdx);
return static_cast<double>(d);
}
template<>
void* LuaStack::getVariable<void*>(lua_State* pLua, int varIdx)
{
return lua_touserdata(pLua, varIdx);
}
//pushVariable
template<>
void LuaStack::pushVariable<const char*>(lua_State* pLua, const char* data)
{
lua_pushstring(pLua, data);
}
template<>
void LuaStack::pushVariable<std::string>(lua_State* pLua, std::string data)
{
lua_pushstring( pLua, data.c_str() );
}
template<>
void LuaStack::pushVariable<const wchar_t*>(lua_State* pLua, const wchar_t* data)
{
lua_pushlstring( pLua, reinterpret_cast<const char*>(data), (wcslen(data)+1)*sizeof(wchar_t) );
}
template<>
void LuaStack::pushVariable<std::wstring>(lua_State* pLua, std::wstring data)
{
lua_pushlstring( pLua, reinterpret_cast<const char*>(data.c_str() ), (data.size()+1)*sizeof(wchar_t) );
}
template<>
void LuaStack::pushVariable<int>(lua_State* pLua, int data)
{
lua_pushinteger(pLua, static_cast<lua_Integer>(data) );
}
template<>
void LuaStack::pushVariable<unsigned int>(lua_State* pLua, unsigned int data)
{
lua_pushinteger(pLua, static_cast<lua_Integer>(data) );
}
template<>
void LuaStack::pushVariable<bool>(lua_State* pLua, bool data)
{
lua_pushboolean(pLua, static_cast<int>(data) );
}
template<>
void LuaStack::pushVariable<float>(lua_State* pLua, float data)
{
lua_pushnumber(pLua, static_cast<lua_Number>(data) );
}
template<>
void LuaStack::pushVariable<double>(lua_State* pLua, double data)
{
lua_pushnumber(pLua, static_cast<lua_Number>(data) );
}
template<>
void LuaStack::pushVariable<void*>(lua_State* pLua, void* data)
{
lua_pushlightuserdata(pLua, data);
}
}
#endif //LUALINK_DEFINE