include/grub/hfs.h

   1 /*
   2  *  GRUB  --  GRand Unified Bootloader
   3  *  Copyright (C) 2005,2006,2007  Free Software Foundation, Inc.
   4  *
   5  *  GRUB is free software: you can redistribute it and/or modify
   6  *  it under the terms of the GNU General Public License as published by
   7  *  the Free Software Foundation, either version 3 of the License, or
   8  *  (at your option) any later version.
   9  *
  10  *  GRUB is distributed in the hope that it will be useful,
  11  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13  *  GNU General Public License for more details.
  14  *
  15  *  You should have received a copy of the GNU General Public License
  16  *  along with GRUB.  If not, see <http://www.gnu.org/licenses/>.
  17  */
  18
  19 #ifndef GRUB_HFS_HEADER
  20 #define GRUB_HFS_HEADER 1
  21
  22 #include <grub/types.h>
  23
  24 #define GRUB_HFS_MAGIC          0x4244
  25
  26 /* A single extent.  A file consists of one or more extents.  */
  27 struct grub_hfs_extent
  28 {
  29   /* The first physical block.  */
  30   grub_uint16_t first_block;
  31   grub_uint16_t count;
  32 };
  33
  34 /* HFS stores extents in groups of 3.  */
  35 typedef struct grub_hfs_extent grub_hfs_datarecord_t[3];
  36
  37 /* The HFS superblock (The official name is `Master Directory
  38    Block').  */
  39 struct grub_hfs_sblock
  40 {
  41   grub_uint16_t magic;
  42   grub_uint8_t unused[18];
  43   grub_uint32_t blksz;
  44   grub_uint8_t unused2[4];
  45   grub_uint16_t first_block;
  46   grub_uint8_t unused4[6];
  47
  48   /* A pascal style string that holds the volumename.  */
  49   grub_uint8_t volname[28];
  50
  51   grub_uint8_t unused5[60];
  52   grub_uint16_t embed_sig;
  53   struct grub_hfs_extent embed_extent;
  54   grub_uint8_t unused6[4];
  55   grub_hfs_datarecord_t extent_recs;
  56   grub_uint32_t catalog_size;
  57   grub_hfs_datarecord_t catalog_recs;
  58 } __attribute__ ((packed));
  59
  60 #endif /* ! GRUB_HFS_HEADER */