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72 lines
2.5 KiB
C
72 lines
2.5 KiB
C
/* msdos_fs.h - MS-DOS filesystem constants/structures
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This program is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>.
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The complete text of the GNU General Public License
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can be found in /usr/share/common-licenses/GPL-3 file.
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*/
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#ifndef _MSDOS_FS_H
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#define _MSDOS_FS_H
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#ifndef __REACTOS__
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#include <stdint.h>
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#endif
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#define SECTOR_SIZE 512 /* sector size (bytes) */
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#define MSDOS_DPS (SECTOR_SIZE / sizeof(struct msdos_dir_entry))
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#define MSDOS_DPS_BITS 4 /* log2(MSDOS_DPS) */
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#define MSDOS_DIR_BITS 5 /* log2(sizeof(struct msdos_dir_entry)) */
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#define ATTR_NONE 0 /* no attribute bits */
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#define ATTR_RO 1 /* read-only */
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#define ATTR_HIDDEN 2 /* hidden */
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#define ATTR_SYS 4 /* system */
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#define ATTR_VOLUME 8 /* volume label */
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#define ATTR_DIR 16 /* directory */
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#define ATTR_ARCH 32 /* archived */
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/* attribute bits that are copied "as is" */
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#define ATTR_UNUSED (ATTR_VOLUME | ATTR_ARCH | ATTR_SYS | ATTR_HIDDEN)
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#define DELETED_FLAG 0xe5 /* marks file as deleted when in name[0] */
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#define IS_FREE(n) (!*(n) || *(n) == DELETED_FLAG)
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#define MSDOS_NAME 11 /* maximum name length */
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#define MSDOS_DOT ". " /* ".", padded to MSDOS_NAME chars */
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#define MSDOS_DOTDOT ".. " /* "..", padded to MSDOS_NAME chars */
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#ifdef __REACTOS__
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#include <pshpack1.h>
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#endif
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struct msdos_dir_entry {
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uint8_t name[MSDOS_NAME]; /* name including extension */
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uint8_t attr; /* attribute bits */
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uint8_t lcase; /* Case for base and extension */
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uint8_t ctime_cs; /* Creation time, centiseconds (0-199) */
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uint16_t ctime; /* Creation time */
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uint16_t cdate; /* Creation date */
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uint16_t adate; /* Last access date */
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uint16_t starthi; /* High 16 bits of cluster in FAT32 */
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uint16_t time, date, start; /* time, date and first cluster */
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uint32_t size; /* file size (in bytes) */
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} __attribute__ ((packed));
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#ifdef __REACTOS__
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#include <poppack.h>
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#endif
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#endif /* _MSDOS_FS_H */
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