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-rw-r--r--libibex/index.h103
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diff --git a/libibex/index.h b/libibex/index.h
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-/* -*- Mode: C; tab-width: 8; indent-tabs-mode: t; c-basic-offset: 8 -*-
- *
- * Copyright (C) 2000 Helix Code, Inc.
- *
- * Authors: Michael Zucchi <notzed@helixcode.com>
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU Library General Public License
- * as published by the Free Software Foundation; either version 2 of
- * the License, or (at your option) any later version.
- *
- * This library is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- * Library General Public License for more details.
- *
- * You should have received a copy of the GNU Library General Public
- * License along with the Gnome Library; see the file COPYING.LIB. If not,
- * write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
- * Boston, MA 02111-1307, USA.
- */
-
-#ifndef _INDEX_H
-#define _INDEX_H
-
-/* an indexing 'class' maps a key to 1 piece of info */
-
-#define INDEX_STAT
-
-struct _IBEXCursor {
- struct _IBEXCursorClass *klass;
- struct _IBEXIndex *index;
-};
-
-struct _IBEXCursorClass {
- void (*close)(struct _IBEXCursor *);
-
- guint32 (*next)(struct _IBEXCursor *);
- char *(*next_key)(struct _IBEXCursor *, int *keylenptr);
-};
-
-struct _IBEXIndex {
- struct _IBEXIndexClass *klass;
- struct _memcache *blocks;
- blockid_t root; /* root block of ondisk index data */
-#ifdef INDEX_STAT
- int lookups; /* how many lookups */
- int lookup_total; /* how many blocks loaded for all lookups (hash chain depth) */
-#endif
-};
-
-struct _IBEXIndexClass {
-
- struct _IBEXIndex *(*create)(struct _memcache *bc, int size);
- struct _IBEXIndex *(*open)(struct _memcache *bc, blockid_t root);
-
- int (*sync)(struct _IBEXIndex *);
- int (*close)(struct _IBEXIndex *);
-
- /* lookup a key in the index, returns the keyid of this item, or 0 if not found */
- guint32 (*find)(struct _IBEXIndex *, const char *key, int keylen);
-
- /* remove a key from the index */
- void (*remove)(struct _IBEXIndex *, const char *key, int keylen);
-
- /* insert a new key into the index, the keyid is returned */
- guint32 (*insert)(struct _IBEXIndex *, const char *key, int keylen);
-
- /* get the key contents/key length from the keyid */
- char *(*get_key)(struct _IBEXIndex *, guint32 keyid, int *keylenptr);
-
- /* set the key contents based on the keyid */
- void (*set_data)(struct _IBEXIndex *, guint32 keyid, blockid_t datablock, blockid_t tail);
-
- /* get the key contents based on the keyid */
- blockid_t (*get_data)(struct _IBEXIndex *, guint32 keyid, blockid_t *tail);
-
- /* get a cursor for iterating over all contents */
- struct _IBEXCursor *(*get_cursor)(struct _IBEXIndex *);
-};
-
-/* a storage class, stores lists of lists of id's */
-
-struct _IBEXStore {
- struct _IBEXStoreClass *klass;
- struct _memcache *blocks;
-};
-
-struct _IBEXStoreClass {
- struct _IBEXStore *(*create)(struct _memcache *bc);
- int (*sync)(struct _IBEXStore *store);
- int (*close)(struct _IBEXStore *store);
-
- blockid_t (*add)(struct _IBEXStore *store, blockid_t *head, blockid_t *tail, nameid_t data);
- blockid_t (*add_list)(struct _IBEXStore *store, blockid_t *head, blockid_t *tail, GArray *data);
- blockid_t (*remove)(struct _IBEXStore *store, blockid_t *head, blockid_t *tail, nameid_t data);
- void (*free)(struct _IBEXStore *store, blockid_t head, blockid_t tail);
-
- gboolean (*find)(struct _IBEXStore *store, blockid_t head, blockid_t tail, nameid_t data);
- GArray *(*get)(struct _IBEXStore *store, blockid_t head, blockid_t tail);
-};
-
-#endif