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/*
* Copyright (C) 1999-2008 Novell, Inc. (www.novell.com)
*
* This library is free software: you can redistribute it and/or modify it
* under the terms of the GNU Lesser General Public License as published by
* the Free Software Foundation.
*
* 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 Lesser General Public License
* for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with this library. If not, see <http://www.gnu.org/licenses/>.
*
* Authors: Michael Zucchi <notzed@ximian.com>
*/
#if !defined (__CAMEL_H_INSIDE__) && !defined (CAMEL_COMPILATION)
#error "Only <camel/camel.h> can be included directly."
#endif
#ifndef CAMEL_BLOCK_FILE_H
#define CAMEL_BLOCK_FILE_H
#include <stdio.h>
#include <sys/types.h>
#include <glib-object.h>
/* Standard GObject macros */
#define CAMEL_TYPE_BLOCK_FILE \
(camel_block_file_get_type ())
#define CAMEL_BLOCK_FILE(obj) \
(G_TYPE_CHECK_INSTANCE_CAST \
((obj), CAMEL_TYPE_BLOCK_FILE, CamelBlockFile))
#define CAMEL_BLOCK_FILE_CLASS(cls) \
(G_TYPE_CHECK_CLASS_CAST \
((cls), CAMEL_TYPE_BLOCK_FILE, CamelBlockFileClass))
#define CAMEL_IS_BLOCK_FILE(obj) \
(G_TYPE_CHECK_INSTANCE_TYPE \
((obj), CAMEL_TYPE_BLOCK_FILE))
#define CAMEL_IS_BLOCK_FILE_CLASS(cls) \
(G_TYPE_CHECK_CLASS_TYPE \
((cls), CAMEL_TYPE_BLOCK_FILE))
#define CAMEL_BLOCK_FILE_GET_CLASS(obj) \
(G_TYPE_INSTANCE_GET_CLASS \
((obj), CAMEL_TYPE_BLOCK_FILE, CamelBlockFileClass))
#define CAMEL_TYPE_KEY_FILE \
(camel_key_file_get_type ())
#define CAMEL_KEY_FILE(obj) \
(G_TYPE_CHECK_INSTANCE_CAST \
((obj), CAMEL_TYPE_KEY_FILE, CamelKeyFile))
#define CAMEL_KEY_FILE_CLASS(cls) \
(G_TYPE_CHECK_CLASS_CAST \
((cls), CAMEL_TYPE_KEY_FILE, CamelKeyFileClass))
#define CAMEL_IS_KEY_FILE(obj) \
(G_TYPE_CHECK_INSTANCE_TYPE \
((obj), CAMEL_TYPE_KEY_FILE))
#define CAMEL_IS_KEY_FILE_CLASS(cls) \
(G_TYPE_CHECK_CLASS_TYPE \
((cls), CAMEL_TYPE_KEY_FILE))
#define CAMEL_KEY_FILE_GET_CLASS(obj) \
(G_TYPE_INSTANCE_GET_CLASS \
((obj), CAMEL_TYPE_KEY_FILE, CamelKeyFileClass))
G_BEGIN_DECLS
typedef guint32 camel_block_t; /* block offset, absolute, bottom BLOCK_SIZE_BITS always 0 */
typedef guint32 camel_key_t; /* this is a bitfield of (block offset:BLOCK_SIZE_BITS) */
typedef struct _CamelBlockRoot CamelBlockRoot;
typedef struct _CamelBlock CamelBlock;
typedef struct _CamelBlockFile CamelBlockFile;
typedef struct _CamelBlockFileClass CamelBlockFileClass;
typedef struct _CamelBlockFilePrivate CamelBlockFilePrivate;
typedef enum {
CAMEL_BLOCK_FILE_SYNC = 1 << 0
} CamelBlockFileFlags;
#define CAMEL_BLOCK_SIZE (1024)
#define CAMEL_BLOCK_SIZE_BITS (10) /* # bits to contain block_size bytes */
typedef enum {
CAMEL_BLOCK_DIRTY = 1 << 0,
CAMEL_BLOCK_DETACHED = 1 << 1
} CamelBlockFlags;
struct _CamelBlockRoot {
gchar version[8]; /* version number */
guint32 flags; /* flags for file */
guint32 block_size; /* block size of this file */
camel_block_t free; /* free block list */
camel_block_t last; /* pointer to end of blocks */
/* subclasses tack on, but no more than CAMEL_BLOCK_SIZE! */
};
/* LRU cache of blocks */
struct _CamelBlock {
camel_block_t id;
CamelBlockFlags flags;
guint32 refcount;
guint32 align00;
guchar data[CAMEL_BLOCK_SIZE];
};
struct _CamelBlockFile {
GObject parent;
CamelBlockFilePrivate *priv;
gchar version[8];
gchar *path;
CamelBlockFileFlags flags;
gint fd;
gsize block_size;
CamelBlockRoot *root;
CamelBlock *root_block;
/* make private? */
gint block_cache_limit;
gint block_cache_count;
GQueue block_cache;
GHashTable *blocks;
};
struct _CamelBlockFileClass {
GObjectClass parent_class;
gint (*validate_root)(CamelBlockFile *);
gint (*init_root)(CamelBlockFile *);
};
GType camel_block_file_get_type (void);
CamelBlockFile *camel_block_file_new (const gchar *path,
gint flags,
const gchar version[8],
gsize block_size);
gint camel_block_file_rename (CamelBlockFile *bs,
const gchar *path);
gint camel_block_file_delete (CamelBlockFile *kf);
CamelBlock * camel_block_file_new_block (CamelBlockFile *bs);
gint camel_block_file_free_block (CamelBlockFile *bs,
camel_block_t id);
CamelBlock * camel_block_file_get_block (CamelBlockFile *bs,
camel_block_t id);
void camel_block_file_detach_block (CamelBlockFile *bs,
CamelBlock *bl);
void camel_block_file_attach_block (CamelBlockFile *bs,
CamelBlock *bl);
void camel_block_file_touch_block (CamelBlockFile *bs,
CamelBlock *bl);
void camel_block_file_unref_block (CamelBlockFile *bs,
CamelBlock *bl);
gint camel_block_file_sync_block (CamelBlockFile *bs,
CamelBlock *bl);
gint camel_block_file_sync (CamelBlockFile *bs);
/* ********************************************************************** */
typedef struct _CamelKeyFile CamelKeyFile;
typedef struct _CamelKeyFileClass CamelKeyFileClass;
typedef struct _CamelKeyFilePrivate CamelKeyFilePrivate;
struct _CamelKeyFile {
GObject parent;
CamelKeyFilePrivate *priv;
FILE *fp;
gchar *path;
gint flags;
goffset last;
};
struct _CamelKeyFileClass {
GObjectClass parent_class;
};
GType camel_key_file_get_type (void);
CamelKeyFile * camel_key_file_new (const gchar *path, gint flags, const gchar version[8]);
gint camel_key_file_rename (CamelKeyFile *kf, const gchar *path);
gint camel_key_file_delete (CamelKeyFile *kf);
gint camel_key_file_write (CamelKeyFile *kf, camel_block_t *parent, gsize len, camel_key_t *records);
gint camel_key_file_read (CamelKeyFile *kf, camel_block_t *start, gsize *len, camel_key_t **records);
G_END_DECLS
#endif /* CAMEL_BLOCK_FILE_H */
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