sdk/lib/fslib/vfatlib/check/msdos_fs.h

   1 /* msdos_fs.h - MS-DOS filesystem constants/structures
   2
   3    This program is free software: you can redistribute it and/or modify
   4    it under the terms of the GNU General Public License as published by
   5    the Free Software Foundation, either version 3 of the License, or
   6    (at your option) any later version.
   7
   8    This program is distributed in the hope that it will be useful,
   9    but WITHOUT ANY WARRANTY; without even the implied warranty of
  10    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  11    GNU General Public License for more details.
  12
  13    You should have received a copy of the GNU General Public License
  14    along with this program. If not, see <http://www.gnu.org/licenses/>.
  15
  16    The complete text of the GNU General Public License
  17    can be found in /usr/share/common-licenses/GPL-3 file.
  18 */
  19
  20 #ifndef _MSDOS_FS_H
  21 #define _MSDOS_FS_H
  22
  23 #ifndef __REACTOS__
  24 #include <stdint.h>
  25 #endif
  26
  27 #define SECTOR_SIZE 512         /* sector size (bytes) */
  28 #define MSDOS_DPS (SECTOR_SIZE / sizeof(struct msdos_dir_entry))
  29 #define MSDOS_DPS_BITS 4        /* log2(MSDOS_DPS) */
  30 #define MSDOS_DIR_BITS 5        /* log2(sizeof(struct msdos_dir_entry)) */
  31
  32 #define ATTR_NONE 0     /* no attribute bits */
  33 #define ATTR_RO 1       /* read-only */
  34 #define ATTR_HIDDEN 2   /* hidden */
  35 #define ATTR_SYS 4      /* system */
  36 #define ATTR_VOLUME 8   /* volume label */
  37 #define ATTR_DIR 16     /* directory */
  38 #define ATTR_ARCH 32    /* archived */
  39
  40 /* attribute bits that are copied "as is" */
  41 #define ATTR_UNUSED (ATTR_VOLUME | ATTR_ARCH | ATTR_SYS | ATTR_HIDDEN)
  42
  43 #define DELETED_FLAG 0xe5       /* marks file as deleted when in name[0] */
  44 #define IS_FREE(n) (!*(n) || *(n) == DELETED_FLAG)
  45
  46 #define MSDOS_NAME 11                   /* maximum name length */
  47 #define MSDOS_DOT ".          "         /* ".", padded to MSDOS_NAME chars */
  48 #define MSDOS_DOTDOT "..         "      /* "..", padded to MSDOS_NAME chars */
  49
  50 #ifdef __REACTOS__
  51 #include <pshpack1.h>
  52 #endif
  53
  54 struct msdos_dir_entry {
  55     uint8_t name[MSDOS_NAME];   /* name including extension */
  56     uint8_t attr;               /* attribute bits */
  57     uint8_t lcase;              /* Case for base and extension */
  58     uint8_t ctime_cs;           /* Creation time, centiseconds (0-199) */
  59     uint16_t ctime;             /* Creation time */
  60     uint16_t cdate;             /* Creation date */
  61     uint16_t adate;             /* Last access date */
  62     uint16_t starthi;           /* High 16 bits of cluster in FAT32 */
  63     uint16_t time, date, start; /* time, date and first cluster */
  64     uint32_t size;              /* file size (in bytes) */
  65 } __attribute__ ((packed));
  66
  67 #ifdef __REACTOS__
  68 #include <poppack.h>
  69 #endif
  70
  71 #endif /* _MSDOS_FS_H */