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Annotation of embedaddon/sudo/compat/memrchr.c, revision 1.1.1.2

1.1       misho       1: /*
1.1.1.2 ! misho       2:  * Copyright (c) 2007, 2010-2011, 2013
        !             3:  *     Todd C. Miller <Todd.Miller@courtesan.com>
1.1       misho       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: 
1.1.1.2 ! misho      20: #ifndef HAVE_MEMRCHR
        !            21: 
1.1       misho      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: }
1.1.1.2 ! misho      44: #endif /* HAVE_MEMRCHR */