1 grand.h

     1 /* GLIB - Library of useful routines for C programming

     2  * Copyright (C) 1995-1997  Peter Mattis, Spencer Kimball and Josh MacDonald

     3  * Portions copyright (c) 2006 Nokia Corporation.  All rights reserved.

     4  *

     5  * This library is free software; you can redistribute it and/or

     6  * modify it under the terms of the GNU Lesser General Public

     7  * License as published by the Free Software Foundation; either

     8  * version 2 of the License, or (at your option) any later version.

     9  *

    10  * This library is distributed in the hope that it will be useful,

    11  * but WITHOUT ANY WARRANTY; without even the implied warranty of

    12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.	 See the GNU

    13  * Lesser General Public License for more details.

    14  *

    15  * You should have received a copy of the GNU Lesser General Public

    16  * License along with this library; if not, write to the

    17  * Free Software Foundation, Inc., 59 Temple Place - Suite 330,

    18  * Boston, MA 02111-1307, USA.

    19  */

    20 

    21 /*

    22  * Modified by the GLib Team and others 1997-2000.  See the AUTHORS

    23  * file for a list of people on the GLib Team.  See the ChangeLog

    24  * files for a list of changes.  These files are distributed with

    25  * GLib at ftp://ftp.gtk.org/pub/gtk/. 

    26  */

    27 

    28 #ifndef __G_RAND_H__

    29 #define __G_RAND_H__

    30 

    31 #include <_ansi.h>

    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.keio.ac.jp/~matumoto/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 IMPORT_C GRand*  g_rand_new_with_seed  (guint32  seed);

    48 IMPORT_C GRand*  g_rand_new_with_seed_array (const guint32 *seed,

    49 				    guint seed_length);

    50 IMPORT_C GRand*  g_rand_new            (void);

    51 IMPORT_C void    g_rand_free           (GRand   *rand_);

    52 IMPORT_C GRand*  g_rand_copy           (GRand   *rand_);

    53 IMPORT_C void    g_rand_set_seed       (GRand   *rand_,

    54 			       guint32  seed);

    55 IMPORT_C void	g_rand_set_seed_array (GRand   *rand_,

    56 			       const guint32 *seed,

    57 			       guint    seed_length);

    58 

    59 #define g_rand_boolean(rand_) ((g_rand_int (rand_) & (1 << 15)) != 0)

    60 

    61 IMPORT_C guint32 g_rand_int            (GRand   *rand_);

    62 IMPORT_C gint32  g_rand_int_range      (GRand   *rand_,

    63 			       gint32   begin,

    64 			       gint32   end);

    65 IMPORT_C gdouble g_rand_double         (GRand   *rand_);

    66 IMPORT_C gdouble g_rand_double_range   (GRand   *rand_,

    67 			       gdouble  begin,

    68 			       gdouble  end);

    69 IMPORT_C void    g_random_set_seed     (guint32  seed);

    70 

    71 #define g_random_boolean() ((g_random_int () & (1 << 15)) != 0)

    72 

    73 IMPORT_C guint32 g_random_int          (void);

    74 IMPORT_C gint32  g_random_int_range    (gint32   begin,

    75 			       gint32   end);

    76 IMPORT_C gdouble g_random_double       (void);

    77 IMPORT_C gdouble g_random_double_range (gdouble  begin,

    78 			       gdouble  end);

    79 

    80 

    81 G_END_DECLS

    82 

    83 #endif /* __G_RAND_H__ */

    84 

    85 

    86 

    87 

    88 

    89