1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
|
/*
* 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);
int camel_block_file_delete(CamelBlockFile *kf);
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_delete(CamelKeyFile *kf);
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 */
|
