glib/grand.h

   1 /* GLIB - Library of useful routines for C programming
   2  * Copyright (C) 1995-1997  Peter Mattis, Spencer Kimball and Josh MacDonald
   3  *
   4  * This library is free software; you can redistribute it and/or
   5  * modify it under the terms of the GNU Lesser General Public
   6  * License as published by the Free Software Foundation; either
   7  * version 2 of the License, or (at your option) any later version.
   8  *
   9  * This library is distributed in the hope that it will be useful,
  10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  12  * Lesser General Public License for more details.
  13  *
  14  * You should have received a copy of the GNU Lesser General Public
  15  * License along with this library; if not, see <http://www.gnu.org/licenses/>.
  16  */
  17
  18 /*
  19  * Modified by the GLib Team and others 1997-2000.  See the AUTHORS
  20  * file for a list of people on the GLib Team.  See the ChangeLog
  21  * files for a list of changes.  These files are distributed with
  22  * GLib at ftp://ftp.gtk.org/pub/gtk/.
  23  */
  24
  25 #ifndef __G_RAND_H__
  26 #define __G_RAND_H__
  27
  28 #if !defined (__GLIB_H_INSIDE__) && !defined (GLIB_COMPILATION)
  29 #error "Only <glib.h> can be included directly."
  30 #endif
  31
  32 #include <glib/gtypes.h>
  33
  34 G_BEGIN_DECLS
  35
  36 typedef struct _GRand           GRand;
  37
  38 /* GRand - a good and fast random number generator: Mersenne Twister
  39  * see http://www.math.sci.hiroshima-u.ac.jp/~m-mat/MT/emt.html for more info.
  40  * The range functions return a value in the intervall [begin, end).
  41  * int          -> [0..2^32-1]
  42  * int_range    -> [begin..end-1]
  43  * double       -> [0..1)
  44  * double_range -> [begin..end)
  45  */
  46
  47 GLIB_AVAILABLE_IN_ALL
  48 GRand*  g_rand_new_with_seed  (guint32  seed);
  49 GLIB_AVAILABLE_IN_ALL
  50 GRand*  g_rand_new_with_seed_array (const guint32 *seed,
  51                                     guint seed_length);
  52 GLIB_AVAILABLE_IN_ALL
  53 GRand*  g_rand_new            (void);
  54 GLIB_AVAILABLE_IN_ALL
  55 void    g_rand_free           (GRand   *rand_);
  56 GLIB_AVAILABLE_IN_ALL
  57 GRand*  g_rand_copy           (GRand   *rand_);
  58 GLIB_AVAILABLE_IN_ALL
  59 void    g_rand_set_seed       (GRand   *rand_,
  60                                guint32  seed);
  61 GLIB_AVAILABLE_IN_ALL
  62 void    g_rand_set_seed_array (GRand   *rand_,
  63                                const guint32 *seed,
  64                                guint    seed_length);
  65
  66 #define g_rand_boolean(rand_) ((g_rand_int (rand_) & (1 << 15)) != 0)
  67
  68 GLIB_AVAILABLE_IN_ALL
  69 guint32 g_rand_int            (GRand   *rand_);
  70 GLIB_AVAILABLE_IN_ALL
  71 gint32  g_rand_int_range      (GRand   *rand_,
  72                                gint32   begin,
  73                                gint32   end);
  74 GLIB_AVAILABLE_IN_ALL
  75 gdouble g_rand_double         (GRand   *rand_);
  76 GLIB_AVAILABLE_IN_ALL
  77 gdouble g_rand_double_range   (GRand   *rand_,
  78                                gdouble  begin,
  79                                gdouble  end);
  80 GLIB_AVAILABLE_IN_ALL
  81 void    g_random_set_seed     (guint32  seed);
  82
  83 #define g_random_boolean() ((g_random_int () & (1 << 15)) != 0)
  84
  85 GLIB_AVAILABLE_IN_ALL
  86 guint32 g_random_int          (void);
  87 GLIB_AVAILABLE_IN_ALL
  88 gint32  g_random_int_range    (gint32   begin,
  89                                gint32   end);
  90 GLIB_AVAILABLE_IN_ALL
  91 gdouble g_random_double       (void);
  92 GLIB_AVAILABLE_IN_ALL
  93 gdouble g_random_double_range (gdouble  begin,
  94                                gdouble  end);
  95
  96
  97 G_END_DECLS
  98
  99 #endif /* __G_RAND_H__ */