Use CSTD and remove local CSTD settings which are no longer needed.
[dragonfly.git] / lib / libstand / dosfs.h
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1/*
2 * Copyright (c) 1996, 1998 Robert Nordier
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 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in
12 * the documentation and/or other materials provided with the
13 * distribution.
14 *
15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR(S) ``AS IS'' AND ANY EXPRESS
16 * OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
17 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
18 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR(S) BE LIABLE FOR ANY
19 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
20 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE
21 * GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
22 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER
23 * IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
24 * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN
25 * IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
26 */
27
28#ifndef DOSIO_H
29#define DOSIO_H
30
31/*
32 * DOS file attributes
33 */
34
35#define FA_RDONLY 001 /* read-only */
36#define FA_HIDDEN 002 /* hidden file */
37#define FA_SYSTEM 004 /* system file */
38#define FA_LABEL 010 /* volume label */
39#define FA_DIR 020 /* directory */
40#define FA_ARCH 040 /* archive (file modified) */
41#define FA_XDE 017 /* extended directory entry */
42#define FA_MASK 077 /* all attributes */
43
44/*
45 * Macros to convert DOS-format 16-bit and 32-bit quantities
46 */
47
48#define cv2(p) ((u_int16_t)(p)[0] | \
49 ((u_int16_t)(p)[1] << 010))
50#define cv4(p) ((u_int32_t)(p)[0] | \
51 ((u_int32_t)(p)[1] << 010) | \
52 ((u_int32_t)(p)[2] << 020) | \
53 ((u_int32_t)(p)[3] << 030))
54
55/*
56 * Directory, filesystem, and file structures.
57 */
58
59typedef struct {
60 u_char x_case; /* case */
61 u_char c_hsec; /* created: secs/100 */
62 u_char c_time[2]; /* created: time */
63 u_char c_date[2]; /* created: date */
64 u_char a_date[2]; /* accessed: date */
65 u_char h_clus[2]; /* clus[hi] */
66} DOS_DEX;
67
68typedef struct {
69 u_char name[8]; /* name */
70 u_char ext[3]; /* extension */
71 u_char attr; /* attributes */
72 DOS_DEX dex; /* VFAT/FAT32 only */
73 u_char time[2]; /* modified: time */
74 u_char date[2]; /* modified: date */
75 u_char clus[2]; /* starting cluster */
76 u_char size[4]; /* size */
77} DOS_DE;
78
79typedef struct {
80 u_char seq; /* flags */
81 u_char name1[5][2]; /* 1st name area */
82 u_char attr; /* (see fat_de) */
83 u_char res; /* reserved */
84 u_char chk; /* checksum */
85 u_char name2[6][2]; /* 2nd name area */
86 u_char clus[2]; /* (see fat_de) */
87 u_char name3[2][2]; /* 3rd name area */
88} DOS_XDE;
89
90typedef union {
91 DOS_DE de; /* standard directory entry */
92 DOS_XDE xde; /* extended directory entry */
93} DOS_DIR;
94
95typedef struct {
96 struct open_file *fd; /* file descriptor */
97 u_char *buf; /* buffer */
98 u_int bufsec; /* buffered sector */
99 u_int links; /* active links to structure */
100 u_int spc; /* sectors per cluster */
101 u_int bsize; /* cluster size in bytes */
102 u_int bshift; /* cluster conversion shift */
103 u_int dirents; /* root directory entries */
104 u_int spf; /* sectors per fat */
105 u_int rdcl; /* root directory start cluster */
106 u_int lsnfat; /* start of fat */
107 u_int lsndir; /* start of root dir */
108 u_int lsndta; /* start of data area */
109 u_int fatsz; /* FAT entry size */
110 u_int xclus; /* maximum cluster number */
111} DOS_FS;
112
113typedef struct {
114 DOS_FS *fs; /* associated filesystem */
115 DOS_DE de; /* directory entry */
116 u_int offset; /* current offset */
117 u_int c; /* last cluster read */
118} DOS_FILE;
119
120#endif /* !DOSIO_H */