/*
 *    This file is part of my_read_iso.
 *
 *    my_read_iso is free software; you can redistribute it and/or modify
 *    it under the terms of the GNU General Public License as published by
 *    the Free Software Foundation; either version 2 of the License, or
 *    (at your option) any later version.
 *
 *    my_read_iso is distributed in the hope that it will be useful,
 *    but WITHOUT ANY WARRANTY; without even the implied warranty of
 *    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *    GNU General Public License for more details.
 *
 *    You should have received a copy of the GNU General Public License
 *    along with my_read_iso; if not, write to the Free Software
 *    Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 *
 *    Copyright Alexandre Becoulet, 2003
 *    contact : alexandre.becoulet@epita.fr
 */

#ifndef ISO9660_H
# define ISO9660_H

# define __packed __attribute__((__packed__))

/* Structures used for twin values */

struct endian32 {
	u32 le;  /* little endian value */
	u32 be;  /* big endian value */
} __packed;

struct endian16 {
	u16 le;  /* little endian value */
	u16 be;  /* big endian value */
} __packed;

# define ISO_BLOCK_SIZE 2048

/* ISO9660 Path table structure */

struct iso_path_table_le {
	u8    idf_len; /* Identifier name length */
	u8    ext_size;  /* Extended attribute record length */
	u32   data_blk;  /* File data block index */
	u16   parent_dir;  /* Number of the parent dir */
	char     idf[0];  /* directory name */
} __packed;

/* ISO9660 directory structure */

# define MAX_DIR_DEPTH 8
# define ISO_DATE_LEN  7

enum iso_file_type {
	ISO_FILE_HIDDEN   = 1,  /* File is Hidden */
	ISO_FILE_ISDIR    = 2,  /* Entry is a Directory */
	ISO_FILE_ASSOCIAT = 4,  /* Entry is an Associated */
	ISO_FILE_USEEXT   = 8,
	/* Information is structured according to the extended attribute record */
	ISO_FILE_USEPERM  = 16,
	/* Permissions are specified in the extended attribute record */
	ISO_FILE_MULTIDIR = 128 /* File has more than one directory record */
};

struct iso_dir {
	u8   dir_size;  /* Length of directory record */
	u8   ext_size;  /* Extended attribute record length */
	struct endian32  data_blk;  /* File data block index */
	struct endian32  file_size; /* File size */
	char      date[ISO_DATE_LEN];
	u8   type;    /* File type (enum iso_file_type) */

	/* only valid if the file is recorded in interleave mode */
	u8   unit_size; /* File Unit Size */
	u8   gap_size;  /* Interleave Gap Size */

	struct endian16  vol_seq;
	u8   idf_len;
	char    idf[0];     /* file name */
} __packed;

/* ISO9660 Primary volume descriptor structure */

# define ISO_PRIM_VOLDESC_BLOCK 16

# define ISO_SYSIDF_LEN 32
# define ISO_VOLIDF_LEN 32
# define ISO_VOLSET_LEN 128
# define ISO_PUBIDF_LEN 128
# define ISO_DPREP_LEN  128
# define ISO_APP_LEN  128
# define ISO_CPRFIL_LEN 37
# define ISO_ABSFIL_LEN 37
# define ISO_BIBFIL_LEN 37
# define ISO_LDATE_LEN  17

struct iso_prim_voldesc {
	u8   vol_desc_type;   /* Volume Descriptor Type (1) */
	char      std_identifier[5]; /* Standard Identifier (CD001) */
	u8   vol_desc_version;  /* Volume Descriptor Version (1) */
	u8   unused1; /* Unused Field */
	char      syidf[ISO_SYSIDF_LEN]; /* System Identifier */
	char      vol_idf[ISO_VOLIDF_LEN]; /* Volume Identifier */
	u8   unused2[8]; /* Unused Field */
	struct endian32  vol_blk_count;
	/* Number of logical blocks in the Volume (LE)*/
	u8   unused4[32]; /* Unused Field */
	struct endian16  vol_set_size; /* The Volume Set size of the Volume */
	struct endian16  vol_seq_num; /* The number of the volume in the Set */
	struct endian16  vol_blk_size; /* The size in bytes of a Logical Block */
	struct endian32  path_table_size; /* Length in bytes of the path table */
	u32  le_path_table_blk; /* LittleEndian path table block index */
	u32  le_opath_table_blk;
	/* LittleEndian optional path table block index */
	u32  be_path_table_blk; /* BigEndian path table block index */
	u32  be_opath_table_blk; /* BigEndian optional path table block index */

	struct iso_dir   root_dir;    /* Root directory entry */
	u8 unused5[34 - sizeof (struct iso_dir)];/* padding */

	char    volset_idf[ISO_VOLSET_LEN];  /* Name of the multiple volume set */
	char    pub_idf[ISO_PUBIDF_LEN]; /* Publisher name */
	char    dprep_idf[ISO_DPREP_LEN];  /* Data preparer name */
	char    app_idf[ISO_APP_LEN];  /* Application name */

	char    copyright_file[ISO_CPRFIL_LEN]; /* Copyright file name in root dir */
	char    abstract_file[ISO_ABSFIL_LEN]; /* Abstract file name in root dir */
	char    bibli_file[ISO_BIBFIL_LEN]; /* Bibliographic file name in root dir */
	char    date_creat[ISO_LDATE_LEN]; /* Creation date */
	char    date_modif[ISO_LDATE_LEN]; /* Modification date */
	char    date_expir[ISO_LDATE_LEN]; /* Expiration date */
	char    date_effect[ISO_LDATE_LEN]; /* Effective date */
	u8 filestrutc_version;  /* File Structure Version (1) */
} __packed;

#endif /* !ISO9660_H */