dbus/dbus-hash.h

   1 /* -*- mode: C; c-file-style: "gnu"; indent-tabs-mode: nil; -*- */
   2 /* dbus-hash.h Generic hash table utility (internal to D-Bus implementation)
   3  *
   4  * Copyright (C) 2002  Red Hat, Inc.
   5  *
   6  * Licensed under the Academic Free License version 2.1
   7  *
   8  * This program is free software; you can redistribute it and/or modify
   9  * it under the terms of the GNU General Public License as published by
  10  * the Free Software Foundation; either version 2 of the License, or
  11  * (at your option) any later version.
  12  *
  13  * This program is distributed in the hope that it will be useful,
  14  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16  * GNU General Public License for more details.
  17  *
  18  * You should have received a copy of the GNU General Public License
  19  * along with this program; if not, write to the Free Software
  20  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
  21  *
  22  */
  23
  24 #ifndef DBUS_HASH_H
  25 #define DBUS_HASH_H
  26
  27 #ifdef HAVE_STDINT_H
  28 #include <stdint.h>
  29 #endif
  30
  31 #ifdef HAVE_INTTYPES_H
  32 #include <inttypes.h>
  33 #endif
  34
  35 #include <dbus/dbus-memory.h>
  36 #include <dbus/dbus-types.h>
  37 #include <dbus/dbus-sysdeps.h>
  38
  39 DBUS_BEGIN_DECLS
  40
  41 /**
  42  * @addtogroup DBusHashTable
  43  * @{
  44  */
  45
  46 /** Hash iterator object. The iterator is on the stack, but its real
  47  * fields are hidden privately.
  48  */
  49 struct DBusHashIter
  50 {
  51   void *dummy1; /**< Do not use. */
  52   void *dummy2; /**< Do not use. */
  53   void *dummy3; /**< Do not use. */
  54   void *dummy4; /**< Do not use. */
  55   int   dummy5; /**< Do not use. */
  56   int   dummy6; /**< Do not use. */
  57 };
  58
  59 typedef struct DBusHashTable DBusHashTable;
  60 typedef struct DBusHashIter  DBusHashIter;
  61
  62 /* Allowing an arbitrary function as with GLib
  63  * would be nicer for a public API, but for
  64  * an internal API this saves typing, we can add
  65  * more whenever we feel like it.
  66  */
  67 typedef enum
  68 {
  69   DBUS_HASH_STRING,        /**< Hash keys are strings. */
  70   DBUS_HASH_INT,           /**< Hash keys are integers. */
  71   DBUS_HASH_UINTPTR        /**< Hash keys are integer capable to hold a pointer. */
  72 } DBusHashType;
  73
  74 DBusHashTable* _dbus_hash_table_new                (DBusHashType      type,
  75                                                     DBusFreeFunction  key_free_function,
  76                                                     DBusFreeFunction  value_free_function);
  77 DBusHashTable* _dbus_hash_table_ref                (DBusHashTable    *table);
  78 void           _dbus_hash_table_unref              (DBusHashTable    *table);
  79 void           _dbus_hash_table_remove_all         (DBusHashTable    *table);
  80 void           _dbus_hash_iter_init                (DBusHashTable    *table,
  81                                                     DBusHashIter     *iter);
  82 dbus_bool_t    _dbus_hash_iter_next                (DBusHashIter     *iter);
  83 void           _dbus_hash_iter_remove_entry        (DBusHashIter     *iter);
  84 void*          _dbus_hash_iter_get_value           (DBusHashIter     *iter);
  85 void           _dbus_hash_iter_set_value           (DBusHashIter     *iter,
  86                                                     void             *value);
  87 int            _dbus_hash_iter_get_int_key         (DBusHashIter     *iter);
  88 const char*    _dbus_hash_iter_get_string_key      (DBusHashIter     *iter);
  89 uintptr_t      _dbus_hash_iter_get_uintptr_key     (DBusHashIter     *iter);
  90 dbus_bool_t    _dbus_hash_iter_lookup              (DBusHashTable    *table,
  91                                                     void             *key,
  92                                                     dbus_bool_t       create_if_not_found,
  93                                                     DBusHashIter     *iter);
  94 void*          _dbus_hash_table_lookup_string      (DBusHashTable    *table,
  95                                                     const char       *key);
  96 void*          _dbus_hash_table_lookup_int         (DBusHashTable    *table,
  97                                                     int               key);
  98 void*          _dbus_hash_table_lookup_uintptr     (DBusHashTable    *table,
  99                                                     uintptr_t         key);
 100 dbus_bool_t    _dbus_hash_table_remove_string      (DBusHashTable    *table,
 101                                                     const char       *key);
 102 dbus_bool_t    _dbus_hash_table_remove_int         (DBusHashTable    *table,
 103                                                     int               key);
 104 dbus_bool_t    _dbus_hash_table_remove_uintptr     (DBusHashTable    *table,
 105                                                     uintptr_t         key);
 106 dbus_bool_t    _dbus_hash_table_insert_string      (DBusHashTable    *table,
 107                                                     char             *key,
 108                                                     void             *value);
 109 dbus_bool_t    _dbus_hash_table_insert_int         (DBusHashTable    *table,
 110                                                     int               key,
 111                                                     void             *value);
 112 dbus_bool_t    _dbus_hash_table_insert_uintptr     (DBusHashTable    *table,
 113                                                     uintptr_t         key,
 114                                                     void             *value);
 115 int            _dbus_hash_table_get_n_entries      (DBusHashTable    *table);
 116
 117 /* Preallocation */
 118
 119 /** A preallocated hash entry */
 120 typedef struct DBusPreallocatedHash DBusPreallocatedHash;
 121
 122 DBusPreallocatedHash *_dbus_hash_table_preallocate_entry          (DBusHashTable        *table);
 123 void                  _dbus_hash_table_free_preallocated_entry    (DBusHashTable        *table,
 124                                                                    DBusPreallocatedHash *preallocated);
 125 void                  _dbus_hash_table_insert_string_preallocated (DBusHashTable        *table,
 126                                                                    DBusPreallocatedHash *preallocated,
 127                                                                    char                 *key,
 128                                                                    void                 *value);
 129
 130 /** @} */
 131
 132 DBUS_END_DECLS
 133
 134 #endif /* DBUS_HASH_H */