(* Strings.def provides a Logitech-3.0 compatible library.

Copyright (C) 2005-2021 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.

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/>.  *)

DEFINITION MODULE Strings ;

EXPORT QUALIFIED Assign, Insert, Delete, Pos, Copy, ConCat, Length,
                 CompareStr ;

(*
   Assign - dest := source.
*)

PROCEDURE Assign (VAR dest: ARRAY OF CHAR; source: ARRAY OF CHAR) ;


(*
   Insert - insert the string, substr, into str at position, index.
            substr, is added to the end of, str, if, index >= length(str)
*)

PROCEDURE Insert (substr: ARRAY OF CHAR; VAR str: ARRAY OF CHAR;
                  index: CARDINAL) ;


(*
   Delete - delete len characters from, str, starting at, index.
*)

PROCEDURE Delete (VAR str: ARRAY OF CHAR; index: CARDINAL; length: CARDINAL) ;


(*
   Pos - return the first position of, substr, in, str.
*)

PROCEDURE Pos (substr, str: ARRAY OF CHAR) : CARDINAL ;


(*
   Copy - copy at most, length, characters in, substr, to, str,
          starting at position, index.
*)

PROCEDURE Copy (str: ARRAY OF CHAR;
                index, length: CARDINAL; VAR result: ARRAY OF CHAR) ;

(*
   ConCat - concatenates two strings, s1, and, s2
            and places the result into, dest.
*)

PROCEDURE ConCat (s1, s2: ARRAY OF CHAR; VAR dest: ARRAY OF CHAR) ;


(*
   Length - return the length of string, s.
*)

PROCEDURE Length (s: ARRAY OF CHAR) : CARDINAL ;


(*
   CompareStr - compare two strings, left, and, right.
*)

PROCEDURE CompareStr (left, right: ARRAY OF CHAR) : INTEGER ;


END Strings.
