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strrstr.c

/* Dynamically allocated strings
   Copyright (c) Kent Irwin (kent.irwin@nist.gov).
   Copyright (c) 2004 Reuben Thomas.
   All rights reserved.

   This file is part of Zile.

   Zile 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 2, or (at your option) any later
   version.

   Zile 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 Zile; see the file COPYING.  If not, write to the Free
   Software Foundation, 59 Temple Place - Suite 330, Boston, MA
   02111-1307, USA.  */

/*    $Id: strrstr.c,v 1.2 2004/12/20 18:23:22 rrt Exp $    */

#include "config.h"

#ifndef HAVE_STRRSTR

#include <string.h>

char *strrstr(const char *s, const char *t);

char *strrstr(const char *s, const char *t) {
        int i, j, slen = strlen(s), tlen = strlen(t);

        if (slen < tlen)
                return NULL;

      for (i = slen - tlen; i > 0; i--) {
            for (j = 0; j < tlen && s[i + j] == t[j]; j++);
                if (j == tlen)
                        return (char *)(s + i);
        }
      return NULL;
}

#endif

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