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1.8.7

    1: /*
    2:  * Copyright (c) 2007, 2010-2011, 2013
    3:  *	Todd C. Miller <Todd.Miller@courtesan.com>
    4:  *
    5:  * Permission to use, copy, modify, and distribute this software for any
    6:  * purpose with or without fee is hereby granted, provided that the above
    7:  * copyright notice and this permission notice appear in all copies.
    8:  *
    9:  * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
   10:  * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
   11:  * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
   12:  * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
   13:  * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
   14:  * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
   15:  * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
   16:  */
   17: 
   18: #include <config.h>
   19: 
   20: #ifndef HAVE_MEMRCHR
   21: 
   22: #include <sys/types.h>
   23: 
   24: #include "missing.h"
   25: 
   26: /*
   27:  * Reverse memchr()
   28:  * Find the last occurrence of 'c' in the buffer 's' of size 'n'.
   29:  */
   30: void *
   31: memrchr(const void *s, int c, size_t n)
   32: {
   33:     const unsigned char *cp;
   34: 
   35:     if (n != 0) {
   36: 	cp = (unsigned char *)s + n;
   37: 	do {
   38: 	    if (*(--cp) == (unsigned char)c)
   39: 		return (void *)cp;
   40: 	} while (--n != 0);
   41:     }
   42:     return (void *)0;
   43: }
   44: #endif /* HAVE_MEMRCHR */