src/memzero.c

   1 /*
   2     Copyright (C) 2012, 2013, 2014, 2015
   3     Ben Kibbey <bjk@luxsci.net>
   4
   5     This file is part of pwmd.
   6
   7     Pwmd is free software: you can redistribute it and/or modify
   8     it under the terms of the GNU General Public License as published by
   9     the Free Software Foundation, either version 2 of the License, or
  10     (at your option) any later version.
  11
  12     Pwmd is distributed in the hope that it will be useful,
  13     but WITHOUT ANY WARRANTY; without even the implied warranty of
  14     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15     GNU General Public License for more details.
  16
  17     You should have received a copy of the GNU General Public License
  18     along with Pwmd.  If not, see <http://www.gnu.org/licenses/>.
  19 */
  20 #ifdef HAVE_CONFIG_H
  21 #include <config.h>
  22 #endif
  23
  24 #include <string.h>
  25 #include "memzero.h"
  26
  27 void
  28 memzero (void *ptr, size_t size)
  29 {
  30 #ifdef HAVE_MEMSET
  31   (void) memset (ptr, 0, size);
  32 #else
  33   size_t n = size;
  34   volatile char *p = (volatile char *) ptr;
  35
  36   while (n)
  37     {
  38       *p++ = 0;
  39       n--;
  40     }
  41 #endif
  42 }