/*
 * strstr.c -- return the offset of one string within another
 *
 * Copyright (C) 1989, 1990 Free Software Foundation, Inc.
 *
 * This program 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.
 *
 * This program 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 this program; if not, write to the Free Software
 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.  
 *
 * $Id: strstr.c,v 1.1 1995/03/14 12:23:27 tom Exp $
 * $Log: strstr.c,v $
 * Revision 1.1  1995/03/14  12:23:27  tom
 * Initial revision
 */

/* Written by Mike Rendell <michael@cs.mun.ca>.  */

/*
 * Return the starting address of string S2 in S1;
 * return 0 if it is not found.
 */

char *
strstr (s1, s2)
  char *s1;
  char *s2;
{
  int i;
  char *p1;
  char *p2;
  char *s = s1;

  for (p2 = s2, i = 0; *s; p2 = s2, i++, s++)
    {
    /* empty loop */
    for (p1 = s; *p1 && *p2 && *p1 == *p2; p1++, p2++);
    if (!*p2)
      break;
    }
  if (!*p2)
    return s1 + i;

  return 0;
}