glib/ghash.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, write to the
  16  * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
  17  * Boston, MA 02111-1307, USA.
  18  */
  19
  20 /*
  21  * Modified by the GLib Team and others 1997-2000.  See the AUTHORS
  22  * file for a list of people on the GLib Team.  See the ChangeLog
  23  * files for a list of changes.  These files are distributed with
  24  * GLib at ftp://ftp.gtk.org/pub/gtk/.
  25  */
  26
  27 #if defined(G_DISABLE_SINGLE_INCLUDES) && !defined (__GLIB_H_INSIDE__) && !defined (GLIB_COMPILATION)
  28 #error "Only <glib.h> can be included directly."
  29 #endif
  30
  31 #ifndef __G_HASH_H__
  32 #define __G_HASH_H__
  33
  34 #include <glib/gtypes.h>
  35 #include <glib/glist.h>
  36
  37 G_BEGIN_DECLS
  38
  39 typedef struct _GHashTable  GHashTable;
  40
  41 typedef gboolean  (*GHRFunc)  (gpointer  key,
  42                                gpointer  value,
  43                                gpointer  user_data);
  44
  45 typedef struct _GHashTableIter GHashTableIter;
  46
  47 struct _GHashTableIter
  48 {
  49   /*< private >*/
  50   gpointer      dummy1;
  51   gpointer      dummy2;
  52   gpointer      dummy3;
  53   int           dummy4;
  54   gboolean      dummy5;
  55   gpointer      dummy6;
  56 };
  57
  58 /* Hash tables
  59  */
  60 GHashTable* g_hash_table_new               (GHashFunc       hash_func,
  61                                             GEqualFunc      key_equal_func);
  62 GHashTable* g_hash_table_new_full          (GHashFunc       hash_func,
  63                                             GEqualFunc      key_equal_func,
  64                                             GDestroyNotify  key_destroy_func,
  65                                             GDestroyNotify  value_destroy_func);
  66 void        g_hash_table_destroy           (GHashTable     *hash_table);
  67 void        g_hash_table_insert            (GHashTable     *hash_table,
  68                                             gpointer        key,
  69                                             gpointer        value);
  70 void        g_hash_table_replace           (GHashTable     *hash_table,
  71                                             gpointer        key,
  72                                             gpointer        value);
  73 gboolean    g_hash_table_remove            (GHashTable     *hash_table,
  74                                             gconstpointer   key);
  75 void        g_hash_table_remove_all        (GHashTable     *hash_table);
  76 gboolean    g_hash_table_steal             (GHashTable     *hash_table,
  77                                             gconstpointer   key);
  78 void        g_hash_table_steal_all         (GHashTable     *hash_table);
  79 gpointer    g_hash_table_lookup            (GHashTable     *hash_table,
  80                                             gconstpointer   key);
  81 gboolean    g_hash_table_lookup_extended   (GHashTable     *hash_table,
  82                                             gconstpointer   lookup_key,
  83                                             gpointer       *orig_key,
  84                                             gpointer       *value);
  85 void        g_hash_table_foreach           (GHashTable     *hash_table,
  86                                             GHFunc          func,
  87                                             gpointer        user_data);
  88 gpointer    g_hash_table_find              (GHashTable     *hash_table,
  89                                             GHRFunc         predicate,
  90                                             gpointer        user_data);
  91 guint       g_hash_table_foreach_remove    (GHashTable     *hash_table,
  92                                             GHRFunc         func,
  93                                             gpointer        user_data);
  94 guint       g_hash_table_foreach_steal     (GHashTable     *hash_table,
  95                                             GHRFunc         func,
  96                                             gpointer        user_data);
  97 guint       g_hash_table_size              (GHashTable     *hash_table);
  98 GList *     g_hash_table_get_keys          (GHashTable     *hash_table);
  99 GList *     g_hash_table_get_values        (GHashTable     *hash_table);
 100
 101 void        g_hash_table_iter_init         (GHashTableIter *iter,
 102                                             GHashTable     *hash_table);
 103 gboolean    g_hash_table_iter_next         (GHashTableIter *iter,
 104                                             gpointer       *key,
 105                                             gpointer       *value);
 106 GHashTable* g_hash_table_iter_get_hash_table (GHashTableIter *iter);
 107 void        g_hash_table_iter_remove       (GHashTableIter *iter);
 108 void        g_hash_table_iter_steal        (GHashTableIter *iter);
 109
 110 /* keeping hash tables alive */
 111 GHashTable* g_hash_table_ref               (GHashTable     *hash_table);
 112 void        g_hash_table_unref             (GHashTable     *hash_table);
 113
 114 #ifndef G_DISABLE_DEPRECATED
 115
 116 /* The following two functions are deprecated and will be removed in
 117  * the next major release. They do no good. */
 118 #define g_hash_table_freeze(hash_table) ((void)0)
 119 #define g_hash_table_thaw(hash_table) ((void)0)
 120
 121 #endif /* G_DISABLE_DEPRECATED */
 122
 123 /* Hash Functions
 124  */
 125 gboolean g_str_equal (gconstpointer  v1,
 126                       gconstpointer  v2);
 127 guint    g_str_hash  (gconstpointer  v);
 128
 129 gboolean g_int_equal (gconstpointer  v1,
 130                       gconstpointer  v2);
 131 guint    g_int_hash  (gconstpointer  v);
 132
 133 /* This "hash" function will just return the key's address as an
 134  * unsigned integer. Useful for hashing on plain addresses or
 135  * simple integer values.
 136  * Passing NULL into g_hash_table_new() as GHashFunc has the
 137  * same effect as passing g_direct_hash().
 138  */
 139 guint    g_direct_hash  (gconstpointer  v) G_GNUC_CONST;
 140 gboolean g_direct_equal (gconstpointer  v1,
 141                          gconstpointer  v2) G_GNUC_CONST;
 142
 143 G_END_DECLS
 144
 145 #endif /* __G_HASH_H__ */