1  /*
 2   * Copyright (c) 1988, 1993
 3   *	The Regents of the University of California.  All rights reserved.
 4   *
 5   * Redistribution and use in source and binary forms, with or without
 6   * modification, are permitted provided that the following conditions
 7   * are met:
 8   * 1. Redistributions of source code must retain the above copyright
 9   *    notice, this list of conditions and the following disclaimer.
10   * 2. Redistributions in binary form must reproduce the above copyright
11   *    notice, this list of conditions and the following disclaimer in the
12   *    documentation and/or other materials provided with the distribution.
13   * 4. Neither the name of the University nor the names of its contributors
14   *    may be used to endorse or promote products derived from this software
15   *    without specific prior written permission.
16   *
17   * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
18   * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
19   * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
20   * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
21   * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
22   * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
23   * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
24   * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
25   * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
26   * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
27   * SUCH DAMAGE.
28   */
29  
30  #if defined(LIBC_SCCS) && !defined(lint)
31  static char sccsid[] = "@(#)rindex.c	8.1 (Berkeley) 6/4/93";
32  #endif /* LIBC_SCCS and not lint */
33  #include <sys/cdefs.h>
34  __FBSDID("$FreeBSD: src/lib/libc/string/rindex.c,v 1.8 2007/01/09 00:28:12 imp Exp $");
35  
36  #include <stddef.h>
37  
38  #ifdef STRRCHR
39  #include <string.h>
40  
41  char *
42  strrchr
43  #else
44  #include <strings.h>
45  
46  char *
47  rindex
48  #endif
49  (const char *p, int ch)
50  {
51  	char *save;
52  	char c;
53  
54  	c = ch;
55  	for (save = NULL;; ++p) {
56  		if (*p == c)
57  			save = (char *)p;
58  		if (*p == '\0')
59  			return (save);
60  	}
61  	/* NOTREACHED */
62  }