src/os2/rand.c

   1 /*****************************************************************************
   2  * rand.c : non-predictible random bytes generator
   3  *****************************************************************************
   4  * Copyright (C) 2011 KO Myung-Hun <komh@chollian.net>
   5  *
   6  * This program is free software; you can redistribute it and/or modify it
   7  * under the terms of the GNU Lesser General Public License as published by
   8  * the Free Software Foundation; either version 2.1 of the License, or
   9  * (at your option) any later version.
  10  *
  11  * This program is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  14  * GNU Lesser General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU Lesser General Public License
  17  * along with this program; if not, write to the Free Software Foundation,
  18  * Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
  19  *****************************************************************************/
  20
  21 #ifdef HAVE_CONFIG_H
  22 # include "config.h"
  23 #endif
  24
  25 #include <vlc_common.h>
  26 #include <vlc_rand.h>
  27
  28 void vlc_rand_bytes (void *buf, size_t len)
  29 {
  30     QWORD qwTime;
  31     uint8_t *p_buf = (uint8_t *)buf;
  32
  33     while (len > 0)
  34     {
  35         DosTmrQueryTime( &qwTime );
  36
  37         *p_buf++ = ( uint8_t )( qwTime.ulLo * rand());
  38         len--;
  39     }
  40 }