(* StrLib.def provides string manipulation procedures.

Copyright (C) 2001-2021 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 StrLib ;

EXPORT QUALIFIED StrConCat, StrLen, StrCopy, StrEqual, StrLess,
      	       	 IsSubString, StrRemoveWhitePrefix ;


(*
   StrConCat - combines a and b into c.
*)

PROCEDURE StrConCat (a, b: ARRAY OF CHAR; VAR c: ARRAY OF CHAR) ;


(*
   StrLess - returns TRUE if string, a, alphabetically occurs before
             string, b.
*)

PROCEDURE StrLess (a, b: ARRAY OF CHAR) : BOOLEAN ;


(*
   StrEqual - performs a = b on two strings.
*)

PROCEDURE StrEqual (a, b: ARRAY OF CHAR) : BOOLEAN ;


(*
   StrLen - returns the length of string, a.
*)

PROCEDURE StrLen (a: ARRAY OF CHAR) : CARDINAL ;


(*
   StrCopy - copy string src into string dest providing dest is large enough.
             If dest is smaller than a then src then the string is truncated when
             dest is full.  Add a nul character if there is room in dest.
*)

PROCEDURE StrCopy (src: ARRAY OF CHAR ; VAR dest: ARRAY OF CHAR) ;


(*
   IsSubString - returns true if b is a subcomponent of a.
*)

PROCEDURE IsSubString (a, b: ARRAY OF CHAR) : BOOLEAN ;


(*
   StrRemoveWhitePrefix - copies string, into string, b, excluding any white
                          space infront of a.
*)

PROCEDURE StrRemoveWhitePrefix (a: ARRAY OF CHAR; VAR b: ARRAY OF CHAR) ;


END StrLib.
