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Annotation of embedaddon/sudo/compat/memrchr.c, revision 1.1.1.1

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