/* extend-fname.c: give a filename a suffix, if necessary.

Copyright (C) 1992, 93 Free Software Foundation, Inc.

This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Library General Public
License as published by the Free Software Foundation; either
version 2 of the License, or (at your option) any later version.

This library 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
Library General Public License for more details.

You should have received a copy of the GNU Library General Public
License along with this library; if not, write to the Free Software
Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.  */

#include <kpathsea/config.h>


/* We may or may not return NAME.  It's up to the caller not to assume
   the return value is modifiable.  */

string 
extend_filename P2C(const_string, name, const_string, default_suffix)
{
  string new_s;
  const_string suffix = find_suffix (name);

  new_s = suffix == NULL ? concat3 (name, ".", default_suffix)
                         : (string) name;
  return new_s;
}