random/random-glib.c

   1 /*
   2  * This file is part of the Nice GLib ICE library.
   3  *
   4  * (C) 2006, 2007 Collabora Ltd.
   5  *  Contact: Dafydd Harries
   6  * (C) 2006, 2007 Nokia Corporation. All rights reserved.
   7  *  Contact: Kai Vehmanen
   8  *
   9  * The contents of this file are subject to the Mozilla Public License Version
  10  * 1.1 (the "License"); you may not use this file except in compliance with
  11  * the License. You may obtain a copy of the License at
  12  * http://www.mozilla.org/MPL/
  13  *
  14  * Software distributed under the License is distributed on an "AS IS" basis,
  15  * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
  16  * for the specific language governing rights and limitations under the
  17  * License.
  18  *
  19  * The Original Code is the Nice GLib ICE library.
  20  *
  21  * The Initial Developers of the Original Code are Collabora Ltd and Nokia
  22  * Corporation. All Rights Reserved.
  23  *
  24  * Contributors:
  25  *   Dafydd Harries, Collabora Ltd.
  26  *
  27  * Alternatively, the contents of this file may be used under the terms of the
  28  * the GNU Lesser General Public License Version 2.1 (the "LGPL"), in which
  29  * case the provisions of LGPL are applicable instead of those above. If you
  30  * wish to allow use of your version of this file only under the terms of the
  31  * LGPL and not to allow others to use your version of this file under the
  32  * MPL, indicate your decision by deleting the provisions above and replace
  33  * them with the notice and other provisions required by the LGPL. If you do
  34  * not delete the provisions above, a recipient may use your version of this
  35  * file under either the MPL or the LGPL.
  36  */
  37 #ifdef HAVE_CONFIG_H
  38 # include "config.h"
  39 #endif
  40
  41 #include "random-glib.h"
  42
  43 static void
  44 rng_seed (
  45   G_GNUC_UNUSED
  46   NiceRNG *rng, guint32 seed)
  47 {
  48   (void)rng;
  49   g_random_set_seed (seed);
  50 }
  51
  52 static void
  53 rng_generate_bytes (
  54   G_GNUC_UNUSED
  55   NiceRNG *rng,
  56   guint len,
  57   gchar *buf)
  58 {
  59   guint i;
  60
  61   (void)rng;
  62
  63   for (i = 0; i < len; i++)
  64     buf[i] = g_random_int_range (0, 256);
  65 }
  66
  67 static guint
  68 rng_generate_int (
  69   G_GNUC_UNUSED
  70   NiceRNG *rng,
  71   guint low,
  72   guint high)
  73 {
  74   (void)rng;
  75   return g_random_int_range (low, high);
  76 }
  77
  78 static void
  79 rng_free (NiceRNG *rng)
  80 {
  81   g_slice_free (NiceRNG, rng);
  82 }
  83
  84 NiceRNG *
  85 nice_rng_glib_new (void)
  86 {
  87   NiceRNG *ret;
  88
  89   ret = g_slice_new0 (NiceRNG);
  90   ret->seed = rng_seed;
  91   ret->generate_bytes = rng_generate_bytes;
  92   ret->generate_int = rng_generate_int;
  93   ret->free = rng_free;
  94   return ret;
  95 }
  96
  97 NiceRNG *
  98 nice_rng_glib_new_predictable (void)
  99 {
 100   NiceRNG *rng;
 101
 102   rng = nice_rng_glib_new ();
 103   rng->seed (rng, 0);
 104   return rng;
 105 }
 106