/*
 *  ISO 9660 filesystem backend for GRUB (GRand Unified Bootloader)
 *  including Rock Ridge Extensions support
 *
 *  Copyright (C) 1998, 1999  Kousuke Takai  <tak@kmc.kyoto-u.ac.jp>
 *
 *  This program 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.
 *
 *  This program 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 this program; if not, write to the Free Software
 *  Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
 */
/*
 *  References:
 *      linux/fs/isofs/rock.[ch]
 *      mkisofs-1.11.1/diag/isoinfo.c
 *      mkisofs-1.11.1/iso9660.h
 *              (all are written by Eric Youngdale)
 */

#ifndef _ISO9660_H_
#define _ISO9660_H_

#define ISO_SECTOR_BITS              (11)
#define ISO_SECTOR_SIZE              (1<<ISO_SECTOR_BITS)

#define ISO_REGULAR     1       /* regular file */
#define ISO_DIRECTORY   2       /* directory    */
#define ISO_OTHER       0       /* other file (with Rock Ridge) */

#define RR_FLAG_PX      0x01    /* have POSIX file attributes */
#define RR_FLAG_PN      0x02    /* POSIX devices */
#define RR_FLAG_SL      0x04    /* Symbolic link */
#define RR_FLAG_NM      0x08    /* have alternate file name   */
#define RR_FLAG_CL      0x10    /* Child link */
#define RR_FLAG_PL      0x20    /* Parent link */
#define RR_FLAG_RE      0x40    /* Relocation directory */
#define RR_FLAG_TF      0x80    /* Timestamps */

/* POSIX file attributes for Rock Ridge extensions */
#define POSIX_S_IFMT    0xF000
#define POSIX_S_IFREG   0x8000
#define POSIX_S_IFDIR   0x4000

/* volume descriptor types */
#define ISO_VD_PRIMARY 1
#define ISO_VD_END 255

#define ISO_STANDARD_ID "CD001"

#ifndef ASM_FILE

#ifndef __sun
#ifndef __BIT_TYPES_DEFINED__
typedef          int     int8_t __attribute__((mode(QI)));
typedef unsigned int   u_int8_t __attribute__((mode(QI)));
typedef          int    int16_t __attribute__((mode(HI)));
typedef unsigned int  u_int16_t __attribute__((mode(HI)));
typedef          int    int32_t __attribute__((mode(SI)));
typedef unsigned int  u_int32_t __attribute__((mode(SI)));
#endif
#else
#ifndef GRUB_UTIL
typedef          char  int8_t;
typedef          short int16_t;
typedef          int   int32_t;
#endif /* ! GRUB_UTIL */
typedef unsigned char  u_int8_t;
typedef unsigned short u_int16_t;
typedef unsigned int   u_int32_t;
#endif /* __sun */

typedef union {
  u_int8_t l,b;
}       iso_8bit_t;

struct __iso_16bit {
  u_int16_t l, b;
} __attribute__ ((packed));
typedef struct __iso_16bit iso_16bit_t;

struct __iso_32bit {
  u_int32_t l, b;
} __attribute__ ((packed));
typedef struct __iso_32bit iso_32bit_t;

typedef u_int8_t                iso_date_t[7];

struct iso_directory_record {
  iso_8bit_t    length;
  iso_8bit_t    ext_attr_length;
  iso_32bit_t   extent;
  iso_32bit_t   size;
  iso_date_t    date;
  iso_8bit_t    flags;
  iso_8bit_t    file_unit_size;
  iso_8bit_t    interleave;
  iso_16bit_t   volume_seq_number;
  iso_8bit_t    name_len;
  u_int8_t      name[1];
} __attribute__ ((packed));

struct iso_primary_descriptor {
  iso_8bit_t    type;
  u_int8_t      id[5];
  iso_8bit_t    version;
  u_int8_t      _unused1[1];
  u_int8_t      system_id[32];
  u_int8_t      volume_id[32];
  u_int8_t      _unused2[8];
  iso_32bit_t   volume_space_size;
  u_int8_t      _unused3[32];
  iso_16bit_t   volume_set_size;
  iso_16bit_t   volume_seq_number;
  iso_16bit_t   logical_block_size;
  iso_32bit_t   path_table_size;
  u_int8_t      type_l_path_table[4];
  u_int8_t      opt_type_l_path_table[4];
  u_int8_t      type_m_path_table[4];
  u_int8_t      opt_type_m_path_table[4];
  struct iso_directory_record root_directory_record;
  u_int8_t      volume_set_id[128];
  u_int8_t      publisher_id[128];
  u_int8_t      preparer_id[128];
  u_int8_t      application_id[128];
  u_int8_t      copyright_file_id[37];
  u_int8_t      abstract_file_id[37];
  u_int8_t      bibliographic_file_id[37];
  u_int8_t      creation_date[17];
  u_int8_t      modification_date[17];
  u_int8_t      expiration_date[17];
  u_int8_t      effective_date[17];
  iso_8bit_t    file_structure_version;
  u_int8_t      _unused4[1];
  u_int8_t      application_data[512];
  u_int8_t      _unused5[653];
} __attribute__ ((packed));

struct rock_ridge {
  u_int16_t     signature;
  u_int8_t      len;
  u_int8_t      version;
  union {
    struct SP {
      u_int16_t magic;
      u_int8_t  skip;
    } sp;
    struct CE {
      iso_32bit_t       extent;
      iso_32bit_t       offset;
      iso_32bit_t       size;
    } ce;
    struct ER {
      u_int8_t  len_id;
      u_int8_t  len_des;
      u_int8_t  len_src;
      u_int8_t  ext_ver;
      u_int8_t  data[0];
    } er;
    struct RR {
      iso_8bit_t        flags;
    } rr;
    struct PX {
      iso_32bit_t       mode;
      iso_32bit_t       nlink;
      iso_32bit_t       uid;
      iso_32bit_t       gid;
    } px;
    struct PN {
      iso_32bit_t       dev_high;
      iso_32bit_t       dev_low;
    } pn;
    struct SL {
      iso_8bit_t flags;
      struct SL_component {
        iso_8bit_t      flags;
        u_int8_t                len;
        u_int8_t                text[0];
      } link;
    } sl;
    struct NM {
      iso_8bit_t        flags;
      u_int8_t  name[0];
    } nm;
    struct CL {
      iso_32bit_t       location;
    } cl;
    struct PL {
      iso_32bit_t       location;
    } pl;
    struct TF {
      iso_8bit_t        flags;
      iso_date_t        times[0];
    } tf;
  } u;
} __attribute__ ((packed));

typedef union RR_ptr {
  struct rock_ridge *rr;
  char            *ptr;
  int              i;
} RR_ptr_t;

#define RRMAGIC(c1, c2) ((c1)|(c2) << 8)

#define CHECK2(ptr, c1, c2) \
        (*(unsigned short *)(ptr) == (((c1) | (c2) << 8) & 0xFFFF))

#endif /* !ASM_FILE */

#endif /* _ISO9660_H_ */