Rev 3572 | Details | Compare with Previous | Last modification | View Log | RSS feed
| Rev | Author | Line No. | Line |
|---|---|---|---|
| 3504 | jermar | 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_FAT_H_ |
||
| 34 | #define FAT_FAT_FAT_H_ |
||
| 35 | |||
| 3506 | jermar | 36 | #include "../../vfs/vfs.h" |
| 37 | #include <stdint.h> |
||
| 3571 | jermar | 38 | #include <libblock.h> |
| 3506 | jermar | 39 | |
| 40 | #define FAT1 0 |
||
| 41 | |||
| 42 | #define FAT_CLST_RES0 0x0000 |
||
| 43 | #define FAT_CLST_RES1 0x0001 |
||
| 44 | #define FAT_CLST_FIRST 0x0002 |
||
| 45 | #define FAT_CLST_BAD 0xfff7 |
||
| 46 | #define FAT_CLST_LAST1 0xfff8 |
||
| 47 | #define FAT_CLST_LAST8 0xffff |
||
| 48 | |||
| 49 | /* internally used to mark root directory's parent */ |
||
| 50 | #define FAT_CLST_ROOTPAR FAT_CLST_RES0 |
||
| 51 | /* internally used to mark root directory */ |
||
| 52 | #define FAT_CLST_ROOT FAT_CLST_RES1 |
||
| 53 | |||
| 54 | /* forward declarations */ |
||
| 55 | struct block; |
||
| 56 | struct fat_node; |
||
| 3516 | jermar | 57 | struct fat_bs; |
| 3506 | jermar | 58 | |
| 59 | typedef uint16_t fat_cluster_t; |
||
| 60 | |||
| 3550 | jermar | 61 | #define fat_clusters_get(bs, dh, fc) \ |
| 3571 | jermar | 62 | fat_cluster_walk((bs), (dh), (fc), NULL, (uint16_t) -1) |
| 63 | extern uint16_t fat_cluster_walk(struct fat_bs *, dev_handle_t, fat_cluster_t, |
||
| 64 | fat_cluster_t *, uint16_t); |
||
| 3550 | jermar | 65 | |
| 3595 | jermar | 66 | #define fat_block_get(bs, np, bn, flags) \ |
| 67 | _fat_block_get((bs), (np)->idx->dev_handle, (np)->firstc, (bn), (flags)) |
||
| 3571 | jermar | 68 | |
| 3516 | jermar | 69 | extern struct block *_fat_block_get(struct fat_bs *, dev_handle_t, |
| 3595 | jermar | 70 | fat_cluster_t, bn_t, int); |
| 3506 | jermar | 71 | |
| 3516 | jermar | 72 | extern void fat_append_clusters(struct fat_bs *, struct fat_node *, |
| 3506 | jermar | 73 | fat_cluster_t); |
| 3572 | jermar | 74 | extern void fat_chop_clusters(struct fat_bs *, struct fat_node *, |
| 75 | fat_cluster_t); |
||
| 3516 | jermar | 76 | extern int fat_alloc_clusters(struct fat_bs *, dev_handle_t, unsigned, |
| 77 | fat_cluster_t *, fat_cluster_t *); |
||
| 3572 | jermar | 78 | extern void fat_free_clusters(struct fat_bs *, dev_handle_t, fat_cluster_t); |
| 3516 | jermar | 79 | extern void fat_alloc_shadow_clusters(struct fat_bs *, dev_handle_t, |
| 80 | fat_cluster_t *, unsigned); |
||
| 3572 | jermar | 81 | extern fat_cluster_t fat_get_cluster(struct fat_bs *, dev_handle_t, fat_cluster_t); |
| 82 | extern void fat_set_cluster(struct fat_bs *, dev_handle_t, unsigned, |
||
| 3516 | jermar | 83 | fat_cluster_t, fat_cluster_t); |
| 84 | extern void fat_fill_gap(struct fat_bs *, struct fat_node *, fat_cluster_t, |
||
| 85 | off_t); |
||
| 3506 | jermar | 86 | |
| 3504 | jermar | 87 | #endif |
| 88 | |||
| 89 | /** |
||
| 90 | * @} |
||
| 91 | */ |