Branch data     Line data    Source code

       1                 :            : /* memxor.c -- perform binary exclusive OR operation of two memory blocks.
       2                 :            :    Copyright (C) 2005-2006, 2009-2012 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 Lesser General Public License as published by
       6                 :            :    the Free Software Foundation; either version 2.1, 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 Lesser General Public License for more details.
      13                 :            : 
      14                 :            :    You should have received a copy of the GNU Lesser General Public License
      15                 :            :    along with this program; if not, see <http://www.gnu.org/licenses/>.  */
      16                 :            : 
      17                 :            : /* Written by Simon Josefsson.  The interface was inspired by memxor
      18                 :            :    in Niels Möller's Nettle. */
      19                 :            : 
      20                 :            : #include <config.h>
      21                 :            : 
      22                 :            : #include "memxor.h"
      23                 :            : 
      24                 :            : void *
      25                 :         96 : memxor (void *restrict dest, const void *restrict src, size_t n)
      26                 :            : {
      27                 :         96 :   char const *s = src;
      28                 :         96 :   char *d = dest;
      29                 :            : 
      30         [ +  + ]:       1920 :   for (; n > 0; n--)
      31                 :       1824 :     *d++ ^= *s++;
      32                 :            : 
      33                 :         96 :   return dest;
      34                 :            : }