source: mainline/uspace/srv/fs/fat/fat_dentry.h@ 8a40c49

lfn serial ticket/834-toolchain-update topic/msim-upgrade topic/simplify-dev-export
Last change on this file since 8a40c49 was 65ccd23, checked in by Oleg Romanenko <romanenko.oleg@…>, 14 years ago

Initial support for LFN. Long names could be read from
filesystem through common api: readdir()

  • Property mode set to 100644
File size: 4.5 KB
Line 
1/*
2 * Copyright (c) 2008 Jakub Jermar
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 *
9 * - Redistributions of source code must retain the above copyright
10 * notice, this list of conditions and the following disclaimer.
11 * - Redistributions in binary form must reproduce the above copyright
12 * notice, this list of conditions and the following disclaimer in the
13 * documentation and/or other materials provided with the distribution.
14 * - The name of the author may not be used to endorse or promote products
15 * derived from this software without specific prior written permission.
16 *
17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
18 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
19 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
20 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
21 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
22 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
23 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
24 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
25 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
26 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
27 */
28
29/** @addtogroup fs
30 * @{
31 */
32
33#ifndef FAT_FAT_DENTRY_H_
34#define FAT_FAT_DENTRY_H_
35
36#include <stdint.h>
37#include <bool.h>
38
39#define FAT_NAME_LEN 8
40#define FAT_EXT_LEN 3
41
42#define FAT_NAME_DOT ". "
43#define FAT_NAME_DOT_DOT ".. "
44#define FAT_EXT_PAD " "
45
46#define FAT_ATTR_RDONLY 0x01
47#define FAT_ATTR_HIDDEN 0x02
48#define FAT_ATTR_SYSTEM 0x04
49#define FAT_ATTR_VOLLABEL 0x08
50#define FAT_ATTR_SUBDIR 0x10
51#define FAT_ATTR_ARCHIVE 0x20
52#define FAT_ATTR_LFN \
53 (FAT_ATTR_RDONLY | FAT_ATTR_HIDDEN | FAT_ATTR_SYSTEM | FAT_ATTR_VOLLABEL)
54
55#define FAT_LCASE_LOWER_NAME 0x08
56#define FAT_LCASE_LOWER_EXT 0x10
57
58#define FAT_PAD ' '
59
60#define FAT_DENTRY_UNUSED 0x00
61#define FAT_DENTRY_E5_ESC 0x05
62#define FAT_DENTRY_DOT 0x2e
63#define FAT_DENTRY_ERASED 0xe5
64#define FAT_LFN_LAST 0x40
65#define FAT_LFN_ERASED 0x80
66
67#define FAT_LFN_ORDER(d) (d->lfn.order)
68#define FAT_IS_LFN(d) \
69 ((FAT_LFN_ORDER(d) & FAT_LFN_LAST) == FAT_LFN_LAST)
70#define FAT_LFN_COUNT(d) \
71 (FAT_LFN_ORDER(d) ^ FAT_LFN_LAST)
72#define FAT_LFN_PART1(d) (d->lfn.part1)
73#define FAT_LFN_PART2(d) (d->lfn.part2)
74#define FAT_LFN_PART3(d) (d->lfn.part3)
75#define FAT_LFN_ATTR(d) (d->lfn.attr)
76#define FAT_LFN_CHKSUM(d) (d->lfn.check_sum)
77
78#define FAT_LFN_NAME_SIZE 255
79#define FAT_LFN_MAX_COUNT 20
80#define FAT_LFN_PART1_SIZE 10
81#define FAT_LFN_PART2_SIZE 12
82#define FAT_LFN_PART3_SIZE 4
83#define FAT_LFN_ENTRY_SIZE \
84 (FAT_LFN_PART1_SIZE + FAT_LFN_PART2_SIZE + FAT_LFN_PART3_SIZE)
85
86typedef enum {
87 FAT_DENTRY_SKIP,
88 FAT_DENTRY_LAST,
89 FAT_DENTRY_FREE,
90 FAT_DENTRY_VALID,
91 FAT_DENTRY_LFN
92} fat_dentry_clsf_t;
93
94typedef struct {
95 union {
96 struct {
97 uint8_t name[8];
98 uint8_t ext[3];
99 uint8_t attr;
100 uint8_t lcase;
101 uint8_t ctime_fine;
102 uint16_t ctime;
103 uint16_t cdate;
104 uint16_t adate;
105 union {
106 uint16_t eaidx; /* FAT12/FAT16 */
107 uint16_t firstc_hi; /* FAT32 */
108 } __attribute__ ((packed));
109 uint16_t mtime;
110 uint16_t mdate;
111 union {
112 uint16_t firstc; /* FAT12/FAT16 */
113 uint16_t firstc_lo; /* FAT32 */
114 } __attribute__ ((packed));
115 uint32_t size;
116 } __attribute__ ((packed));
117 struct {
118 uint8_t order;
119 uint8_t part1[FAT_LFN_PART1_SIZE];
120 uint8_t attr;
121 uint8_t type;
122 uint8_t check_sum;
123 uint8_t part2[FAT_LFN_PART2_SIZE];
124 uint16_t firstc_lo; /* MUST be 0 */
125 uint8_t part3[FAT_LFN_PART3_SIZE];
126 } lfn __attribute__ ((packed));
127 };
128} __attribute__ ((packed)) fat_dentry_t;
129
130
131extern int fat_dentry_namecmp(char *, const char *);
132extern bool fat_dentry_name_verify(const char *);
133extern void fat_dentry_name_get(const fat_dentry_t *, char *);
134extern void fat_dentry_name_set(fat_dentry_t *, const char *);
135extern fat_dentry_clsf_t fat_classify_dentry(const fat_dentry_t *);
136extern uint8_t fat_dentry_chksum(uint8_t *);
137
138extern size_t fat_lfn_str_nlength(const uint8_t *, size_t);
139extern size_t fat_lfn_size(const fat_dentry_t *);
140extern void fat_lfn_copy_part(const uint8_t *, size_t, uint8_t *, size_t *);
141extern void fat_lfn_copy_entry(const fat_dentry_t *, uint8_t *, size_t *);
142extern int fat_lfn_convert_name(const uint8_t *, size_t, uint8_t *, size_t);
143
144
145#endif
146
147/**
148 * @}
149 */
Note: See TracBrowser for help on using the repository browser.