| [6ebaff9] | 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 |
|
|---|
| [0f57d0e] | 36 | #include "../../vfs/vfs.h"
|
|---|
| 37 | #include <stdint.h>
|
|---|
| 38 |
|
|---|
| 39 | #define FAT1 0
|
|---|
| 40 |
|
|---|
| 41 | #define FAT_CLST_RES0 0x0000
|
|---|
| 42 | #define FAT_CLST_RES1 0x0001
|
|---|
| 43 | #define FAT_CLST_FIRST 0x0002
|
|---|
| 44 | #define FAT_CLST_BAD 0xfff7
|
|---|
| 45 | #define FAT_CLST_LAST1 0xfff8
|
|---|
| 46 | #define FAT_CLST_LAST8 0xffff
|
|---|
| 47 |
|
|---|
| 48 | /* internally used to mark root directory's parent */
|
|---|
| 49 | #define FAT_CLST_ROOTPAR FAT_CLST_RES0
|
|---|
| 50 | /* internally used to mark root directory */
|
|---|
| 51 | #define FAT_CLST_ROOT FAT_CLST_RES1
|
|---|
| 52 |
|
|---|
| 53 |
|
|---|
| 54 | /* forward declarations */
|
|---|
| 55 | struct block;
|
|---|
| 56 | struct fat_node;
|
|---|
| 57 |
|
|---|
| 58 | typedef uint16_t fat_cluster_t;
|
|---|
| 59 |
|
|---|
| 60 | #define fat_block_get(np, off) \
|
|---|
| 61 | _fat_block_get((np)->idx->dev_handle, (np)->firstc, (off))
|
|---|
| 62 |
|
|---|
| 63 | extern struct block *_fat_block_get(dev_handle_t, fat_cluster_t, off_t);
|
|---|
| 64 | extern uint16_t _fat_blcks_get(dev_handle_t, fat_cluster_t);
|
|---|
| 65 | extern uint16_t fat_bps_get(dev_handle_t);
|
|---|
| 66 |
|
|---|
| 67 | extern void fat_append_clusters(struct fat_node *, fat_cluster_t);
|
|---|
| 68 | extern int fat_alloc_clusters(dev_handle_t, unsigned, fat_cluster_t *,
|
|---|
| 69 | fat_cluster_t *);
|
|---|
| 70 | extern void fat_alloc_shadow_clusters(dev_handle_t, fat_cluster_t *, unsigned);
|
|---|
| 71 | extern void fat_mark_cluster(dev_handle_t, unsigned, fat_cluster_t,
|
|---|
| 72 | fat_cluster_t);
|
|---|
| 73 | extern void fat_fill_gap(struct fat_node *, fat_cluster_t, off_t);
|
|---|
| 74 |
|
|---|
| [6ebaff9] | 75 | #endif
|
|---|
| 76 |
|
|---|
| 77 | /**
|
|---|
| 78 | * @}
|
|---|
| 79 | */
|
|---|
