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/*
* Copyright (C) 2001 Ximian Inc.
*
* Authors: Michael Zucchi <notzed@ximian.com>
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of version 2 of the GNU General Public
* License as published by the Free Software Foundation.
*
* This program 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
* General Public License for more details.
*
* You should have received a copy of the GNU General Public
* License along with this program; if not, write to the
* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
*/
#ifndef _CAMEL_BLOCK_FILE_H
#define _CAMEL_BLOCK_FILE_H
#include <camel/camel-object.h>
#include <glib.h>
#include <e-util/e-msgport.h>
#include <stdio.h>
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;
#define CAMEL_BLOCK_FILE_SYNC (1<<0)
#define CAMEL_BLOCK_SIZE (1024)
#define CAMEL_BLOCK_SIZE_BITS (10) /* # bits to contain block_size bytes */
#define CAMEL_BLOCK_DIRTY (1<<0)
#define CAMEL_BLOCK_DETACHED (1<<1)
struct _CamelBlockRoot {
char 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 {
struct _CamelBlock *next;
struct _CamelBlock *prev;
camel_block_t id;
guint32 flags;
guint32 refcount;
guint32 align00;
unsigned char data[CAMEL_BLOCK_SIZE];
};
struct _CamelBlockFile {
CamelObject parent;
struct _CamelBlockFilePrivate *priv;
char version[8];
char *path;
int flags;
int fd;
size_t block_size;
CamelBlockRoot *root;
CamelBlock *root_block;
/* make private? */
int block_cache_limit;
int block_cache_count;
EDList block_cache;
GHashTable *blocks;
};
struct _CamelBlockFileClass {
CamelObjectClass parent;
int (*validate_root)(CamelBlockFile *);
int (*init_root)(CamelBlockFile *);
};
CamelType camel_block_file_get_type(void);
CamelBlockFile *camel_block_file_new(const char *path, int flags, const char version[8], size_t block_size);
int camel_block_file_rename(CamelBlockFile *bs, const char *path);
CamelBlock *camel_block_file_new_block(CamelBlockFile *bs);
int 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);
int camel_block_file_sync_block(CamelBlockFile *bs, CamelBlock *bl);
int camel_block_file_sync(CamelBlockFile *bs);
/* ********************************************************************** */
typedef struct _CamelKeyFile CamelKeyFile;
typedef struct _CamelKeyFileClass CamelKeyFileClass;
struct _CamelKeyFile {
CamelObject parent;
struct _CamelKeyFilePrivate *priv;
FILE *fp;
char *path;
int flags;
off_t last;
};
struct _CamelKeyFileClass {
CamelObjectClass parent;
};
CamelType camel_key_file_get_type(void);
CamelKeyFile * camel_key_file_new(const char *path, int flags, const char version[8]);
int camel_key_file_rename(CamelKeyFile *kf, const char *path);
int camel_key_file_write(CamelKeyFile *kf, camel_block_t *parent, size_t len, camel_key_t *records);
int camel_key_file_read(CamelKeyFile *kf, camel_block_t *start, size_t *len, camel_key_t **records);
#endif /* ! _CAMEL_BLOCK_FILE_H */
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