assuan/memrchr.c

   1 /* memrchr.c - Replacement for memrchr.
   2  * Copyright (C) 2002, 2004, 2005 Free Software Foundation, Inc.
   3  *
   4  * This file is part of Assuan.
   5  *
   6  * Assuan is free software; you can redistribute it and/or modify it
   7  * under the terms of the GNU Lesser General Public License as
   8  * published by the Free Software Foundation; either version 2.1 of
   9  * the License, or (at your option) any later version.
  10  *
  11  * Assuan is distributed in the hope that it will be useful, but
  12  * WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14  * Lesser General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU Lesser General Public
  17  * License along with this program; if not, see <http://www.gnu.org/licenses/>.
  18  */
  19
  20 #ifdef HAVE_CONFIG_H
  21 #include <config.h>
  22 #endif
  23
  24 #include <string.h>
  25
  26 void *
  27 memrchr (const void *block, int c, size_t size)
  28 {
  29   const unsigned char *p = block;
  30
  31   if (size)
  32     {
  33       for (p += size - 1; size; p--, size--)
  34         if (*p == c)
  35           return (void *)p;
  36     }
  37   return NULL;
  38 }
  39