/*      $NetBSD: iso.h,v 1.10 2011/09/27 01:01:44 christos Exp $        */

/*-
* Copyright (c) 1994
*      The Regents of the University of California.  All rights reserved.
*
* This code is derived from software contributed to Berkeley
* by Pace Willisson ([email protected]).  The Rock Ridge Extension
* Support code is derived from software contributed to Berkeley
* by Atsushi Murai ([email protected]).
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
*    notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
*    notice, this list of conditions and the following disclaimer in the
*    documentation and/or other materials provided with the distribution.
* 3. Neither the name of the University nor the names of its contributors
*    may be used to endorse or promote products derived from this software
*    without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
*      @(#)iso.h       8.6 (Berkeley) 5/10/95
*/

/*
* Definitions describing ISO9660 file system structure, as well as
* the functions necessary to access fields of ISO9660 file system
* structures.
*/

#ifndef _ISOFS_CD9660_ISO_H_
#define _ISOFS_CD9660_ISO_H_

#define ISODCL(from, to) (to - from + 1)

struct iso_volume_descriptor {
       char type[ISODCL(1,1)]; /* 711 */
       char id[ISODCL(2,6)];
       char version[ISODCL(7,7)];
       char data[ISODCL(8,2048)];
};

/* volume descriptor types */
#define ISO_VD_PRIMARY 1
#define ISO_VD_SUPPLEMENTARY 2
#define ISO_VD_END 255

#define ISO_STANDARD_ID "CD001"
#define ISO_ECMA_ID     "CDW01"

#define ISO_MAXNAMLEN   255

struct iso_primary_descriptor {
       char type                       [ISODCL (  1,   1)]; /* 711 */
       char id                         [ISODCL (  2,   6)];
       char version                    [ISODCL (  7,   7)]; /* 711 */
       char unused1                    [ISODCL (  8,   8)];
       char system_id                  [ISODCL (  9,  40)]; /* achars */
       char volume_id                  [ISODCL ( 41,  72)]; /* dchars */
       char unused2                    [ISODCL ( 73,  80)];
       char volume_space_size          [ISODCL ( 81,  88)]; /* 733 */
       char unused3                    [ISODCL ( 89, 120)];
       char volume_set_size            [ISODCL (121, 124)]; /* 723 */
       char volume_sequence_number     [ISODCL (125, 128)]; /* 723 */
       char logical_block_size         [ISODCL (129, 132)]; /* 723 */
       char path_table_size            [ISODCL (133, 140)]; /* 733 */
       char type_l_path_table          [ISODCL (141, 144)]; /* 731 */
       char opt_type_l_path_table      [ISODCL (145, 148)]; /* 731 */
       char type_m_path_table          [ISODCL (149, 152)]; /* 732 */
       char opt_type_m_path_table      [ISODCL (153, 156)]; /* 732 */
       char root_directory_record      [ISODCL (157, 190)]; /* 9.1 */
       char volume_set_id              [ISODCL (191, 318)]; /* dchars */
       char publisher_id               [ISODCL (319, 446)]; /* achars */
       char preparer_id                [ISODCL (447, 574)]; /* achars */
       char application_id             [ISODCL (575, 702)]; /* achars */
       char copyright_file_id          [ISODCL (703, 739)]; /* 7.5 dchars */
       char abstract_file_id           [ISODCL (740, 776)]; /* 7.5 dchars */
       char bibliographic_file_id      [ISODCL (777, 813)]; /* 7.5 dchars */
       char creation_date              [ISODCL (814, 830)]; /* 8.4.26.1 */
       char modification_date          [ISODCL (831, 847)]; /* 8.4.26.1 */
       char expiration_date            [ISODCL (848, 864)]; /* 8.4.26.1 */
       char effective_date             [ISODCL (865, 881)]; /* 8.4.26.1 */
       char file_structure_version     [ISODCL (882, 882)]; /* 711 */
       char unused4                    [ISODCL (883, 883)];
       char application_data           [ISODCL (884, 1395)];
       char unused5                    [ISODCL (1396, 2048)];
};
#define ISO_DEFAULT_BLOCK_SIZE          2048

struct iso_supplementary_descriptor {
       char type                       [ISODCL (  1,   1)]; /* 711 */
       char id                         [ISODCL (  2,   6)];
       char version                    [ISODCL (  7,   7)]; /* 711 */
       char flags                      [ISODCL (  8,   8)]; /* 711? */
       char system_id                  [ISODCL (  9,  40)]; /* achars */
       char volume_id                  [ISODCL ( 41,  72)]; /* dchars */
       char unused2                    [ISODCL ( 73,  80)];
       char volume_space_size          [ISODCL ( 81,  88)]; /* 733 */
       char escape                     [ISODCL ( 89, 120)];
       char volume_set_size            [ISODCL (121, 124)]; /* 723 */
       char volume_sequence_number     [ISODCL (125, 128)]; /* 723 */
       char logical_block_size         [ISODCL (129, 132)]; /* 723 */
       char path_table_size            [ISODCL (133, 140)]; /* 733 */
       char type_l_path_table          [ISODCL (141, 144)]; /* 731 */
       char opt_type_l_path_table      [ISODCL (145, 148)]; /* 731 */
       char type_m_path_table          [ISODCL (149, 152)]; /* 732 */
       char opt_type_m_path_table      [ISODCL (153, 156)]; /* 732 */
       char root_directory_record      [ISODCL (157, 190)]; /* 9.1 */
       char volume_set_id              [ISODCL (191, 318)]; /* dchars */
       char publisher_id               [ISODCL (319, 446)]; /* achars */
       char preparer_id                [ISODCL (447, 574)]; /* achars */
       char application_id             [ISODCL (575, 702)]; /* achars */
       char copyright_file_id          [ISODCL (703, 739)]; /* 7.5 dchars */
       char abstract_file_id           [ISODCL (740, 776)]; /* 7.5 dchars */
       char bibliographic_file_id      [ISODCL (777, 813)]; /* 7.5 dchars */
       char creation_date              [ISODCL (814, 830)]; /* 8.4.26.1 */
       char modification_date          [ISODCL (831, 847)]; /* 8.4.26.1 */
       char expiration_date            [ISODCL (848, 864)]; /* 8.4.26.1 */
       char effective_date             [ISODCL (865, 881)]; /* 8.4.26.1 */
       char file_structure_version     [ISODCL (882, 882)]; /* 711 */
       char unused4                    [ISODCL (883, 883)];
       char application_data           [ISODCL (884, 1395)];
       char unused5                    [ISODCL (1396, 2048)];
};

struct iso_directory_record {
       char length                     [ISODCL (1, 1)]; /* 711 */
       char ext_attr_length            [ISODCL (2, 2)]; /* 711 */
       u_char extent                   [ISODCL (3, 10)]; /* 733 */
       u_char size                     [ISODCL (11, 18)]; /* 733 */
       char date                       [ISODCL (19, 25)]; /* 7 by 711 */
       char flags                      [ISODCL (26, 26)];
       char file_unit_size             [ISODCL (27, 27)]; /* 711 */
       char interleave                 [ISODCL (28, 28)]; /* 711 */
       char volume_sequence_number     [ISODCL (29, 32)]; /* 723 */
       char name_len                   [ISODCL (33, 33)]; /* 711 */
       char name                       [1];                    /* XXX */
};
/* can't take sizeof(iso_directory_record), because of possible alignment
  of the last entry (34 instead of 33) */
#define ISO_DIRECTORY_RECORD_SIZE       33

struct iso_extended_attributes {
       u_char owner                    [ISODCL (1, 4)]; /* 723 */
       u_char group                    [ISODCL (5, 8)]; /* 723 */
       u_char perm                     [ISODCL (9, 10)]; /* 9.5.3 */
       char ctime                      [ISODCL (11, 27)]; /* 8.4.26.1 */
       char mtime                      [ISODCL (28, 44)]; /* 8.4.26.1 */
       char xtime                      [ISODCL (45, 61)]; /* 8.4.26.1 */
       char ftime                      [ISODCL (62, 78)]; /* 8.4.26.1 */
       char recfmt                     [ISODCL (79, 79)]; /* 711 */
       char recattr                    [ISODCL (80, 80)]; /* 711 */
       u_char reclen                   [ISODCL (81, 84)]; /* 723 */
       char system_id                  [ISODCL (85, 116)]; /* achars */
       char system_use                 [ISODCL (117, 180)];
       char version                    [ISODCL (181, 181)]; /* 711 */
       char len_esc                    [ISODCL (182, 182)]; /* 711 */
       char reserved                   [ISODCL (183, 246)];
       u_char len_au                   [ISODCL (247, 250)]; /* 723 */
};

/* 7.1.1: unsigned char */
static __inline __unused int
isonum_711(const u_char *p)
{
       return *p;
}

/* 7.1.2: signed char */
static __inline __unused int
isonum_712(const u_char *p)
{
       return (signed char) *p;
}

/* 7.2.1: unsigned little-endian 16-bit value.  NOT USED IN KERNEL. */
static __inline __unused uint16_t
isonum_721(const u_char *p)
{
       return le16dec(p);
}

/* 7.2.2: unsigned big-endian 16-bit value.  NOT USED IN KERNEL. */
static __inline __unused uint16_t
isonum_722(const u_char *p)
{
       return be16dec(p);
}

/* 7.2.3: unsigned both-endian (little, then big) 16-bit value */
static __inline __unused uint16_t
isonum_723(const u_char *p)
{
#if BYTE_ORDER == BIG_ENDIAN
       return be16dec(p + 2);
#else
       return le16dec(p);
#endif
}

/* 7.3.1: unsigned little-endian 32-bit value.  NOT USED IN KERNEL. */
static __inline __unused uint32_t
isonum_731(const u_char *p)
{
       return le32dec(p);
}

/* 7.3.2: unsigned big-endian 32-bit value.  NOT USED IN KERNEL. */
static __inline __unused uint32_t
isonum_732(const u_char *p)
{
       return be32dec(p);
}

/* 7.3.3: unsigned both-endian (little, then big) 32-bit value */
static __inline __unused uint32_t
isonum_733(const u_char *p)
{
#if BYTE_ORDER == BIG_ENDIAN
       return be32dec(p + 4);
#else
       return le32dec(p);
#endif
}

/*
* Associated files have a leading '='.
*/
#define ASSOCCHAR       '='

#endif /* _ISOFS_CD9660_ISO_H_ */

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