src/memzero.c

   1 /*
   2     Copyright (C) 2012
   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 memzero(void *ptr, size_t size)
  28 {
  29 #ifdef HAVE_MEMSET
  30     (void)memset(ptr, 0, size);
  31 #else
  32     size_t n = size;
  33     volatile char *p = (volatile char *)ptr;
  34
  35     while (n) {
  36         *p++ = 0;
  37         n--;
  38     }
  39 #endif
  40 }