lua51scriptargument.cpp

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// © Copyright 2010 - 2016 BlackTopp Studios Inc.
/* This file is part of The Mezzanine Engine.

    The Mezzanine Engine is free software: you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
    the Free Software Foundation, either version 3 of the License, or
    (at your option) any later version.

    The Mezzanine Engine 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 General Public License for more details.

    You should have received a copy of the GNU General Public License
    along with The Mezzanine Engine.  If not, see <http://www.gnu.org/licenses/>.
*/
/* The original authors have included a copy of the license specified above in the
   'Docs' folder. See 'gpl.txt'
*/
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   However there are some practical restrictions, so if your project involves
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   Joseph Toppi - toppij@gmail.com
   John Blackwood - makoenergy02@gmail.com
*/
#ifndef _lua51scriptargument_cpp
#define _lua51scriptargument_cpp

#include "datatypes.h"
#include "lua51scriptargument.h"

#ifdef MEZZLUA51

#include "lua51script.h"
#include "lua51scriptingengine.h"
#include "exception.h"

#include <algorithm>

/// @file
/// @brief This file has the implementation for the Lua script argument.

extern "C"
{
    #include "lua.h"            // Lua Core
    #include "lualib.h"         // for opening the base state
    #include "lauxlib.h"        // Extra Lua Goodies like lua_open()
}

namespace Mezzanine
{
    namespace Scripting
    {
        namespace Lua
        {


            void Lua51IntegerArgument::Push(lua_State* TargetState) const
                { lua_pushinteger(TargetState, this->Datum); }
            void Lua51IntegerArgument::Pop(lua_State* TargetState)
            {
                int Top = lua_gettop(TargetState);
                if(LUA_TNUMBER==lua_type(TargetState,Top))
                {
                    Datum = lua_tointeger(TargetState,Top);
                    lua_pop(TargetState,1);
                }
                else
                { MEZZ_EXCEPTION(ExceptionBase::PARAMETERS_EXCEPTION, "Expected a Lua number(Integer), but found something else.") }
            }

            void Lua51RealArgument::Push(lua_State* TargetState) const
                { lua_pushnumber(TargetState, this->Datum); }
            void Lua51RealArgument::Pop(lua_State* TargetState)
            {
                int Top = lua_gettop(TargetState);
                if(LUA_TNUMBER==lua_type(TargetState,Top))
                {
                    Datum = lua_tonumber(TargetState,Top);
                    lua_pop(TargetState,1);
                }
                else
                    { MEZZ_EXCEPTION(ExceptionBase::PARAMETERS_EXCEPTION, "Expected a Lua number(Real), but found something else.") }
            }

            void Lua51WholeArgument::Push(lua_State* TargetState) const
                { lua_pushnumber(TargetState, this->Datum); }
            void Lua51WholeArgument::Pop(lua_State* TargetState)
            {
                int Top = lua_gettop(TargetState);
                if(LUA_TNUMBER==lua_type(TargetState,Top))
                {
                    Datum = lua_tointeger(TargetState,Top);
                    lua_pop(TargetState,1);
                }
                else
                    { MEZZ_EXCEPTION(ExceptionBase::PARAMETERS_EXCEPTION, "Expected a Lua number(Whole), but found something else.") }
            }

            void Lua51StringArgument::Push(lua_State *TargetState) const
                { lua_pushlstring(TargetState, this->Datum.c_str(), this->Datum.size() ); }
            void Lua51StringArgument::Pop(lua_State *TargetState)
            {
                int Top = lua_gettop(TargetState);
                if(LUA_TSTRING==lua_type(TargetState,Top))
                {
                    Datum = lua_tostring(TargetState,Top);
                    lua_pop(TargetState,1);
                }
                else
                    { MEZZ_EXCEPTION(ExceptionBase::PARAMETERS_EXCEPTION, "Expected a Lua string(String), but found something else.") }
            }

            void Lua51BoolArgument::Push(lua_State *TargetState) const
                { lua_pushboolean(TargetState, this->Datum); }
            void Lua51BoolArgument::Pop(lua_State *TargetState)
            {
                int Top = lua_gettop(TargetState);
                if(LUA_TBOOLEAN==lua_type(TargetState,Top))
                {
                    Datum = lua_toboolean(TargetState,Top);
                    lua_pop(TargetState,1);
                }
                else
                    { MEZZ_EXCEPTION(ExceptionBase::PARAMETERS_EXCEPTION, "Expected a Lua string(String), but found something else.") }
            }

            void Lua51NilArgument::Push(lua_State *TargetState) const
                { lua_pushnil(TargetState); }
            void Lua51NilArgument::Pop(lua_State *TargetState)
            {
                int Top = lua_gettop(TargetState);
                if(LUA_TNIL==lua_type(TargetState,Top))
                    { lua_pop(TargetState,1); }
                else
                    { MEZZ_EXCEPTION(ExceptionBase::PARAMETERS_EXCEPTION, "Expected a Lua string(String), but found something else.") }
                // It seems Lua Nils never go on the stack when being returned sometimes.
            }




        } // Lua
    } // Scripting
} // Mezzanine




#endif //  MEZZLUA51
#endif