random/random-glib.c

   1 /*
   2  * This file is part of the Nice GLib ICE library.
   3  *
   4  * (C) 2006-2008 Collabora Ltd.
   5  *  Contact: Dafydd Harries
   6  * (C) 2006-2008 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  *   Youness Alaoui, Collabora Ltd.
  27  *   Kai Vehmanen, Nokia
  28  *
  29  * Alternatively, the contents of this file may be used under the terms of the
  30  * the GNU Lesser General Public License Version 2.1 (the "LGPL"), in which
  31  * case the provisions of LGPL are applicable instead of those above. If you
  32  * wish to allow use of your version of this file only under the terms of the
  33  * LGPL and not to allow others to use your version of this file under the
  34  * MPL, indicate your decision by deleting the provisions above and replace
  35  * them with the notice and other provisions required by the LGPL. If you do
  36  * not delete the provisions above, a recipient may use your version of this
  37  * file under either the MPL or the LGPL.
  38  */
  39 #ifdef HAVE_CONFIG_H
  40 # include "config.h"
  41 #endif
  42
  43 #include "random-glib.h"
  44
  45 static void
  46 rng_seed (
  47   G_GNUC_UNUSED
  48   NiceRNG *rng, guint32 seed)
  49 {
  50   (void)rng;
  51   g_random_set_seed (seed);
  52 }
  53
  54 static void
  55 rng_generate_bytes (
  56   G_GNUC_UNUSED
  57   NiceRNG *rng,
  58   guint len,
  59   gchar *buf)
  60 {
  61   guint i;
  62
  63   (void)rng;
  64
  65   for (i = 0; i < len; i++)
  66     buf[i] = g_random_int_range (0, 256);
  67 }
  68
  69 static guint
  70 rng_generate_int (
  71   G_GNUC_UNUSED
  72   NiceRNG *rng,
  73   guint low,
  74   guint high)
  75 {
  76   (void)rng;
  77   return g_random_int_range (low, high);
  78 }
  79
  80 static void
  81 rng_free (NiceRNG *rng)
  82 {
  83   g_slice_free (NiceRNG, rng);
  84 }
  85
  86 NiceRNG *
  87 nice_rng_glib_new (void)
  88 {
  89   NiceRNG *ret;
  90
  91   ret = g_slice_new0 (NiceRNG);
  92   ret->seed = rng_seed;
  93   ret->generate_bytes = rng_generate_bytes;
  94   ret->generate_int = rng_generate_int;
  95   ret->free = rng_free;
  96   return ret;
  97 }
  98
  99 NiceRNG *
 100 nice_rng_glib_new_predictable (void)
 101 {
 102   NiceRNG *rng;
 103
 104   rng = nice_rng_glib_new ();
 105   rng->seed (rng, 0);
 106   return rng;
 107 }
 108