(* Copyright (C) 2005-2023 Free Software Foundation, Inc. *)
(* This file is part of GNU Modula-2.

GNU Modula-2 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, or (at your option) any later
version.

GNU Modula-2 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 gm2; see the file COPYING.  If not, write to the Free Software
Foundation, 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. *)
DEFINITION MODULE MakeBoxes ;

(*
   Title      : MakeBoxes
   Author     : Gaius Mulley
   Date       : 15/7/88
   LastEdit   : 15/7/88
   System     : LOGITECH MODULA-2/86
   Description: Provides a list of all possible box sizes.
                Any number of unique boxes may be requested and deleted.
*)

EXPORT QUALIFIED InitBoxes, KillBoxes,
                 AddBoxes, GetAndDeleteRandomBox ;


(*
   InitBoxes - Initializes a list of boxes.
               An index to this box list is returned.
*)

PROCEDURE InitBoxes () : CARDINAL ;


(*
   KillBoxes - Kills a complete box list.
*)

PROCEDURE KillBoxes (BoxListIndex: CARDINAL) ;


(*
   AddBoxes - Adds a list of boxes MinX..MaxX, MinY..MaxY
              to a box list BoxListIndex.
*)

PROCEDURE AddBoxes (BoxListIndex: CARDINAL;
                    MinX, MinY, MaxX, MaxY: CARDINAL) ;


(*
   GetAndDeleteRandomBox - Returns a random box from the box list and
                           this box is then deleted from the list.
*)

PROCEDURE GetAndDeleteRandomBox (BoxListIndex: CARDINAL;
                                 VAR SizeX, SizeY: CARDINAL) ;


END MakeBoxes.