| 0,0 → 1,91 |
|---|
| /* |
| * Copyright (c) 2008 Jakub Jermar |
| * All rights reserved. |
| * |
| * Redistribution and use in source and binary forms, with or without |
| * modification, are permitted provided that the following conditions |
| * are met: |
| * |
| * - Redistributions of source code must retain the above copyright |
| * notice, this list of conditions and the following disclaimer. |
| * - Redistributions in binary form must reproduce the above copyright |
| * notice, this list of conditions and the following disclaimer in the |
| * documentation and/or other materials provided with the distribution. |
| * - The name of the author may not be used to endorse or promote products |
| * derived from this software without specific prior written permission. |
| * |
| * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR |
| * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
| * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
| * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
| * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
| * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
| * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
| * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
| * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| */ |
| |
| /** @addtogroup fs |
| * @{ |
| */ |
| |
| #ifndef FAT_FAT_FAT_H_ |
| #define FAT_FAT_FAT_H_ |
| |
| #include "../../vfs/vfs.h" |
| #include <stdint.h> |
| #include <libblock.h> |
| |
| #define FAT1 0 |
| |
| #define FAT_CLST_RES0 0x0000 |
| #define FAT_CLST_RES1 0x0001 |
| #define FAT_CLST_FIRST 0x0002 |
| #define FAT_CLST_BAD 0xfff7 |
| #define FAT_CLST_LAST1 0xfff8 |
| #define FAT_CLST_LAST8 0xffff |
| |
| /* internally used to mark root directory's parent */ |
| #define FAT_CLST_ROOTPAR FAT_CLST_RES0 |
| /* internally used to mark root directory */ |
| #define FAT_CLST_ROOT FAT_CLST_RES1 |
| |
| /* forward declarations */ |
| struct block; |
| struct fat_node; |
| struct fat_bs; |
| |
| typedef uint16_t fat_cluster_t; |
| |
| #define fat_clusters_get(bs, dh, fc) \ |
| fat_cluster_walk((bs), (dh), (fc), NULL, (uint16_t) -1) |
| extern uint16_t fat_cluster_walk(struct fat_bs *, dev_handle_t, fat_cluster_t, |
| fat_cluster_t *, uint16_t); |
| |
| #define fat_block_get(bs, np, bn) \ |
| _fat_block_get((bs), (np)->idx->dev_handle, (np)->firstc, (bn)) |
| |
| extern struct block *_fat_block_get(struct fat_bs *, dev_handle_t, |
| fat_cluster_t, bn_t); |
| |
| extern void fat_append_clusters(struct fat_bs *, struct fat_node *, |
| fat_cluster_t); |
| extern void fat_chop_clusters(struct fat_bs *, struct fat_node *, |
| fat_cluster_t); |
| extern int fat_alloc_clusters(struct fat_bs *, dev_handle_t, unsigned, |
| fat_cluster_t *, fat_cluster_t *); |
| extern void fat_free_clusters(struct fat_bs *, dev_handle_t, fat_cluster_t); |
| extern void fat_alloc_shadow_clusters(struct fat_bs *, dev_handle_t, |
| fat_cluster_t *, unsigned); |
| extern fat_cluster_t fat_get_cluster(struct fat_bs *, dev_handle_t, fat_cluster_t); |
| extern void fat_set_cluster(struct fat_bs *, dev_handle_t, unsigned, |
| fat_cluster_t, fat_cluster_t); |
| extern void fat_fill_gap(struct fat_bs *, struct fat_node *, fat_cluster_t, |
| off_t); |
| |
| #endif |
| |
| /** |
| * @} |
| */ |