/* find-suffix.c: return the stuff after a dot.

   Copyright 1992, 1993, 1995, 2008 Karl Berry.

   This library is free software; you can redistribute it and/or
   modify it under the terms of the GNU Lesser General Public
   License as published by the Free Software Foundation; either
   version 2.1 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
   Lesser General Public License for more details.

   You should have received a copy of the GNU Lesser General Public License
   along with this library; if not, see <http://www.gnu.org/licenses/>.  */

#include <kpathsea/config.h>

#include <kpathsea/c-pathch.h>


/* Return pointer to first character after `.' in last directory element
   of NAME.  If the name is `foo' or `/foo.bar/baz', we have no extension.  */

string
find_suffix (const_string name)
{
  const_string slash_pos;
  string dot_pos = strrchr (name, '.');

  if (dot_pos == NULL)
    return NULL;

  for (slash_pos = name + strlen (name);
       slash_pos > dot_pos && !IS_DIR_SEP (*slash_pos);
       slash_pos--)
    ;

  return slash_pos > dot_pos ? NULL : dot_pos + 1;
}