gl/memxor.c

   1 /* memxor.c -- perform binary exclusive OR operation of two memory blocks.
   2    Copyright (C) 2005, 2006 Free Software Foundation, Inc.
   3
   4    This program is free software; you can redistribute it and/or modify
   5    it under the terms of the GNU General Public License as published by
   6    the Free Software Foundation; either version 2, or (at your option)
   7    any later version.
   8
   9    This program is distributed in the hope that it will be useful,
  10    but WITHOUT ANY WARRANTY; without even the implied warranty of
  11    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12    GNU General Public License for more details.
  13
  14    You should have received a copy of the GNU General Public License
  15    along with this program; if not, write to the Free Software Foundation,
  16    Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.  */
  17
  18 /* Written by Simon Josefsson.  The interface was inspired by memxor
  19    in Niels Möller's Nettle. */
  20
  21 #include <config.h>
  22
  23 #include "memxor.h"
  24
  25 void *
  26 memxor (void *restrict dest, const void *restrict src, size_t n)
  27 {
  28   char const *s = src;
  29   char *d = dest;
  30
  31   for (; n > 0; n--)
  32     *d++ ^= *s++;
  33
  34   return dest;
  35 }