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1 | /* |
1 | /* |
2 | * Copyright (c) 2008 Jakub Jermar |
2 | * Copyright (c) 2008 Jakub Jermar |
3 | * All rights reserved. |
3 | * All rights reserved. |
4 | * |
4 | * |
5 | * Redistribution and use in source and binary forms, with or without |
5 | * Redistribution and use in source and binary forms, with or without |
6 | * modification, are permitted provided that the following conditions |
6 | * modification, are permitted provided that the following conditions |
7 | * are met: |
7 | * are met: |
8 | * |
8 | * |
9 | * - Redistributions of source code must retain the above copyright |
9 | * - Redistributions of source code must retain the above copyright |
10 | * notice, this list of conditions and the following disclaimer. |
10 | * notice, this list of conditions and the following disclaimer. |
11 | * - Redistributions in binary form must reproduce the above copyright |
11 | * - Redistributions in binary form must reproduce the above copyright |
12 | * notice, this list of conditions and the following disclaimer in the |
12 | * notice, this list of conditions and the following disclaimer in the |
13 | * documentation and/or other materials provided with the distribution. |
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 |
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. |
15 | * derived from this software without specific prior written permission. |
16 | * |
16 | * |
17 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR |
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 |
18 | * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
19 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
19 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
20 | * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
20 | * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
21 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
21 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
22 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
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 |
23 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
24 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
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 |
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. |
26 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
27 | */ |
27 | */ |
28 | 28 | ||
29 | /** @addtogroup fs |
29 | /** @addtogroup fs |
30 | * @{ |
30 | * @{ |
31 | */ |
31 | */ |
32 | 32 | ||
33 | /** |
33 | /** |
34 | * @file fat_dentry.c |
34 | * @file fat_dentry.c |
35 | * @brief Functions that work with FAT directory entries. |
35 | * @brief Functions that work with FAT directory entries. |
36 | */ |
36 | */ |
37 | 37 | ||
38 | #include "fat_dentry.h" |
38 | #include "fat_dentry.h" |
39 | 39 | ||
40 | #define FAT_PAD ' ' |
40 | #define FAT_PAD ' ' |
41 | 41 | ||
42 | #define FAT_DENTRY_UNUSED 0x00 |
42 | #define FAT_DENTRY_UNUSED 0x00 |
43 | #define FAT_DENTRY_E5_ESC 0x05 |
43 | #define FAT_DENTRY_E5_ESC 0x05 |
44 | #define FAT_DENTRY_DOT 0x2e |
44 | #define FAT_DENTRY_DOT 0x2e |
45 | #define FAT_DENTRY_ERASED 0xe5 |
45 | #define FAT_DENTRY_ERASED 0xe5 |
46 | 46 | ||
47 | void dentry_name_canonify(fat_dentry_t *d, char *buf) |
47 | void dentry_name_canonify(fat_dentry_t *d, char *buf) |
48 | { |
48 | { |
49 | int i; |
49 | int i; |
50 | 50 | ||
51 | for (i = 0; i < FAT_NAME_LEN; i++) { |
51 | for (i = 0; i < FAT_NAME_LEN; i++) { |
52 | if (d->name[i] == FAT_PAD) |
52 | if (d->name[i] == FAT_PAD) |
53 | break; |
53 | break; |
54 | if (d->name[i] == FAT_DENTRY_E5_ESC) |
54 | if (d->name[i] == FAT_DENTRY_E5_ESC) |
55 | *buf++ = 0xe5; |
55 | *buf++ = 0xe5; |
56 | else |
56 | else |
57 | *buf++ = d->name[i]; |
57 | *buf++ = d->name[i]; |
58 | } |
58 | } |
59 | if (d->ext[0] != FAT_PAD) |
59 | if (d->ext[0] != FAT_PAD) |
60 | *buf++ = '.'; |
60 | *buf++ = '.'; |
61 | for (i = 0; i < FAT_EXT_LEN; i++) { |
61 | for (i = 0; i < FAT_EXT_LEN; i++) { |
62 | if (d->ext[i] == FAT_PAD) { |
62 | if (d->ext[i] == FAT_PAD) { |
63 | *buf = '\0'; |
63 | *buf = '\0'; |
64 | return; |
64 | return; |
65 | } |
65 | } |
66 | if (d->ext[i] == FAT_DENTRY_E5_ESC) |
66 | if (d->ext[i] == FAT_DENTRY_E5_ESC) |
67 | *buf++ = 0xe5; |
67 | *buf++ = 0xe5; |
68 | else |
68 | else |
69 | *buf++ = d->ext[i]; |
69 | *buf++ = d->ext[i]; |
70 | } |
70 | } |
71 | *buf = '\0'; |
71 | *buf = '\0'; |
72 | } |
72 | } |
73 | 73 | ||
74 | fat_dentry_clsf_t fat_classify_dentry(fat_dentry_t *d) |
74 | fat_dentry_clsf_t fat_classify_dentry(fat_dentry_t *d) |
75 | { |
75 | { |
76 | if (d->attr & FAT_ATTR_VOLLABEL) { |
76 | if (d->attr & FAT_ATTR_VOLLABEL) { |
77 | /* volume label entry */ |
77 | /* volume label entry */ |
78 | return FAT_DENTRY_SKIP; |
78 | return FAT_DENTRY_SKIP; |
79 | } |
79 | } |
80 | if (d->name[0] == FAT_DENTRY_ERASED) { |
80 | if (d->name[0] == FAT_DENTRY_ERASED) { |
81 | /* not-currently-used entry */ |
81 | /* not-currently-used entry */ |
82 | return FAT_DENTRY_SKIP; |
82 | return FAT_DENTRY_SKIP; |
83 | } |
83 | } |
84 | if (d->name[0] == FAT_DENTRY_UNUSED) { |
84 | if (d->name[0] == FAT_DENTRY_UNUSED) { |
85 | /* never used entry */ |
85 | /* never used entry */ |
86 | return FAT_DENTRY_LAST; |
86 | return FAT_DENTRY_LAST; |
87 | } |
87 | } |
88 | if (d->name[0] == FAT_DENTRY_DOT) { |
88 | if (d->name[0] == FAT_DENTRY_DOT) { |
89 | /* |
89 | /* |
90 | * Most likely '.' or '..'. |
90 | * Most likely '.' or '..'. |
91 | * It cannot occur in a regular file name. |
91 | * It cannot occur in a regular file name. |
92 | */ |
92 | */ |
93 | return FAT_DENTRY_SKIP; |
93 | return FAT_DENTRY_SKIP; |
94 | } |
94 | } |
95 | return FAT_DENTRY_VALID; |
95 | return FAT_DENTRY_VALID; |
96 | } |
96 | } |
97 | 97 | ||
98 | /** |
98 | /** |
99 | * @} |
99 | * @} |
100 | */ |
100 | */ |
101 | 101 |