* fs/hfsplus.c (grub_hfsplus_read_block): Convert the offset of
the HFS+ filesystem to filesystem blocks.
(grub_hfsplus_iterate_dir): Cast the `fileinfo' assignment so a
GCC warning is silenced.
* fs/hfs.c: Include <grub/hfs.h>. Added reference to the official
documentation.
(GRUB_HFS_EMBED_HFSPLUS_SIG): New macro.
(grub_hfs_mount): Grammar fix in error. Make sure this is not an
embedded HFS+ filesystem.
(GRUB_HFS_MAGIC, grub_hfs_extent, grub_hfs_datarecord_t)
(grub_hfs_sblock): Move from here...
* include/grub/hfs.h: To here... New file.
* fs/hfsplus.c: Include <grub/hfs.h>. Added reference to the official
documentation.
(GRUB_HFSPLUS_MAGIC, GRUB_HFSPLUSX_MAGIC, GRUB_HFSPLUS_SBLOCK):
New macros.
(grub_hfsplus_volheader): Change type of member `magic' to
`grub_uint16_t'.
(grub_hfsplus_data): Add new member `embedded_offset'.
(grub_hfsplus_read_block): Add the HFS+ wrapper offset to the
returned block.
(grub_hfsplus_mount): Read the HFS+ wrapper if it exists.
Calculate the offset.