------------------------------------------------------------------------------
-- Ada Lua Binding --
-- --
-- Copyright (C) 2014, AdaCore --
-- --
-- This library is free software; you can redistribute it and/or modify --
-- it under terms of the GNU General Public License as published by the --
-- Free Software Foundation; either version 3, or (at your option) any --
-- later version. This library 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. --
-- --
-- As a special exception under Section 7 of GPL version 3, you are --
-- granted additional permissions described in the GCC Runtime Library --
-- Exception, version 3.1, as published by the Free Software Foundation. --
-- --
-- You should have received a copy of the GNU General Public License and --
-- a copy of the GCC Runtime Library Exception along with this program; --
-- see the files COPYING3 and COPYING.RUNTIME respectively. If not, see --
-- <http://www.gnu.org/licenses/>. --
-- --
-- As a special exception, if other files instantiate generics from this --
-- unit, or you link this unit with other files to produce an executable, --
-- this unit does not by itself cause the resulting executable to be --
-- covered by the GNU General Public License. This exception does not --
-- however invalidate any other reasons why the executable file might be --
-- covered by the GNU Public License. --
------------------------------------------------------------------------------
with System.Address_To_Access_Conversions;
package body Lua.Ada_Limited_Types is
package Conv is new System.Address_To_Access_Conversions (Ada_Type);
------------------
-- New_Instance --
------------------
function New_Instance (State : Lua_State) return Integer is
Arg_Num : constant Lua_Index := Get_Top (State);
Result : constant access Ada_Type := new Ada_Type;
begin
if Arg_Num /= 0 then
Push (State, "no argument expected");
return Error (State);
end if;
Push (State, Result);
return 1;
end New_Instance;
----------
-- Push --
----------
procedure Push (State : Lua_State; Data : access Ada_Type) is
begin
Push (State, Lua_Light_User_Data (Data.all'Address));
end Push;
------------
-- To_Ada --
------------
function To_Ada
(State : Lua_State;
Index : Lua_Index)
return access Ada_Type
is
User_Data : constant Lua_User_Data := To_Ada (State, Index);
Result : constant access Ada_Type :=
Conv.To_Pointer (System.Address (User_Data));
begin
return Result;
end To_Ada;
end Lua.Ada_Limited_Types;