| 1 | /*
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| 2 | * Copyright (c) 2008 Jakub Jermar
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| 3 | * All rights reserved.
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| 4 | *
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| 5 | * Redistribution and use in source and binary forms, with or without
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| 6 | * modification, are permitted provided that the following conditions
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| 7 | * are met:
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| 8 | *
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| 9 | * - Redistributions of source code must retain the above copyright
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| 10 | * notice, this list of conditions and the following disclaimer.
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| 11 | * - Redistributions in binary form must reproduce the above copyright
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| 12 | * notice, this list of conditions and the following disclaimer in the
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| 13 | * documentation and/or other materials provided with the distribution.
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| 14 | * - The name of the author may not be used to endorse or promote products
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| 15 | * derived from this software without specific prior written permission.
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| 16 | *
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| 17 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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| 18 | * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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| 19 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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| 20 | * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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| 21 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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| 22 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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| 23 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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| 24 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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| 25 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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| 26 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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| 27 | */
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| 28 |
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| 29 | /** @addtogroup fs
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| 30 | * @{
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| 31 | */
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| 32 |
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| 33 | #ifndef FAT_FAT_FAT_H_
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| 34 | #define FAT_FAT_FAT_H_
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| 35 |
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| 36 | #include "../../vfs/vfs.h"
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| 37 | #include <stdint.h>
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| 38 |
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| 39 | #define FAT1 0
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| 40 |
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| 41 | #define FAT_CLST_RES0 0x0000
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| 42 | #define FAT_CLST_RES1 0x0001
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| 43 | #define FAT_CLST_FIRST 0x0002
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| 44 | #define FAT_CLST_BAD 0xfff7
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| 45 | #define FAT_CLST_LAST1 0xfff8
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| 46 | #define FAT_CLST_LAST8 0xffff
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| 47 |
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| 48 | /* internally used to mark root directory's parent */
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| 49 | #define FAT_CLST_ROOTPAR FAT_CLST_RES0
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| 50 | /* internally used to mark root directory */
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| 51 | #define FAT_CLST_ROOT FAT_CLST_RES1
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| 52 |
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| 53 |
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| 54 | /* forward declarations */
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| 55 | struct block;
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| 56 | struct fat_node;
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| 57 |
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| 58 | typedef uint16_t fat_cluster_t;
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| 59 |
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| 60 | #define fat_block_get(np, off) \
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| 61 | _fat_block_get((np)->idx->dev_handle, (np)->firstc, (off))
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| 62 |
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| 63 | extern struct block *_fat_block_get(dev_handle_t, fat_cluster_t, off_t);
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| 64 | extern uint16_t _fat_blcks_get(dev_handle_t, fat_cluster_t);
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| 65 | extern uint16_t fat_bps_get(dev_handle_t);
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| 66 |
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| 67 | extern void fat_append_clusters(struct fat_node *, fat_cluster_t);
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| 68 | extern int fat_alloc_clusters(dev_handle_t, unsigned, fat_cluster_t *,
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| 69 | fat_cluster_t *);
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| 70 | extern void fat_alloc_shadow_clusters(dev_handle_t, fat_cluster_t *, unsigned);
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| 71 | extern void fat_mark_cluster(dev_handle_t, unsigned, fat_cluster_t,
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| 72 | fat_cluster_t);
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| 73 | extern void fat_fill_gap(struct fat_node *, fat_cluster_t, off_t);
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| 74 |
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| 75 | #endif
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| 76 |
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| 77 | /**
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| 78 | * @}
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| 79 | */
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