(* cflex.def provides a Modula-2 definition module for C lexical analysis.

Copyright (C) 2003-2023 Free Software Foundation, Inc.
Contributed by Gaius Mulley <gaius.mulley@southwales.ac.uk>.

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 GNU Modula-2; see the file COPYING3.  If not see
<http://www.gnu.org/licenses/>.  *)

DEFINITION MODULE cflex ;

(*
    Title      : clex
    Author     : Gaius Mulley
    System     : GNU Modula-2
    Date       : Thu Jan 23 12:39:36 2003
    Revision   : $Version$
    Description: provides a Modula-2 definition module for C lexical analysis.
*)

FROM SYSTEM IMPORT ADDRESS ;
EXPORT QUALIFIED GetToken, AdvanceToken, CError, OpenSource, CloseSource, GetLineNo,
                 ParsingOn, SetSearchPath, AddTypeDef ;


(*
   CloseSource - provided for semantic sugar
*)

PROCEDURE CloseSource ;


(*
   OpenSource - returns TRUE if file, s, can be opened and
                all tokens are taken from this file.
*)

PROCEDURE OpenSource (s: ADDRESS) : BOOLEAN ;


(*
   GetToken - returns the ADDRESS of the next token.
*)

PROCEDURE GetToken () : ADDRESS ;


(*
   AdvanceToken - move onto the next token.
*)

PROCEDURE AdvanceToken ;


(*
   GetLineNo - returns the current line number.
*)

PROCEDURE GetLineNo () : CARDINAL ;


(*
   CError - displays the error message, s, after the code line and pointer
            to the erroneous token.
*)

PROCEDURE CError (s: ADDRESS) ;


(*
   ParsingOn - if t is FALSE then the lexical analysis will
               consume all lines except when a line is one of
               '#endif' or '#else' or '#if' or '#ifdef'
*)

PROCEDURE ParsingOn (t: BOOLEAN) ;


(*
   SetSearchPath - reassigns the search path to newPath.
*)

PROCEDURE SetSearchPath (newPath: ADDRESS) ;


(*
   AddTypeDef - adds the string, a, to the list of typedefs.
*)

PROCEDURE AddTypeDef (a: ADDRESS) ;


END cflex.