(* Copyright (C) 2001, 2002, 2003, 2004, 2005, 2006 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 2, 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. *)

IMPLEMENTATION MODULE opaque ;

CONST
   MaxBuf   = 127 ;

TYPE
   Contents = RECORD
                 buf : ARRAY [0..MaxBuf-1] OF CHAR ;
                 len : CARDINAL ;
                 next: String ;
              END ;

   Descriptor = POINTER TO descriptor ;   (* forward declaration necessary for p2c *)

   String = POINTER TO RECORD
                          contents: Contents ;
                          head    : Descriptor ;
                       END ;

   descriptor =            RECORD
                              charStarUsed : BOOLEAN ;     (* can we garbage collect this? *)
                              charStarSize : CARDINAL ;
                              charStarValid: BOOLEAN ;
                              state        : (inuse, marked, onlist, poisoned) ;
                              garbage      : String ;      (* temporary strings to be destroyed
                                                              once this string is killed *)
                           END ;


END opaque.