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Add iso9660 library and regression test.

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Will be deleted from vcdimager-cdio branch.
cd_types.c: forgot to add previously.
This commit is contained in:
rocky
2003-08-17 05:31:19 +00:00
parent 1f17d9961d
commit 82d792cd44
15 changed files with 1427 additions and 11 deletions
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lib/cd_types.c Normal file
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/*
$Id: cd_types.c,v 1.1 2003/08/17 05:31:19 rocky Exp $
Copyright (C) 2003 Rocky Bernstein <rocky@panix.com>
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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
/*
This tries to determine what kind of CD-image or filesystems on a
track we've got.
*/
#include "config.h"
#ifdef HAVE_STDIO_H
#include <stdio.h>
#endif
#ifdef HAVE_STDLIB_H
#include <stdlib.h>
#endif
#ifdef HAVE_UNISTD_H
#include <unistd.h>
#endif
#ifdef HAVE_STRING_H
#include <string.h>
#endif
#include <cdio/cdio.h>
#include <cdio/logging.h>
#include <cdio/util.h>
#include <cdio/cd_types.h>
/*
Subject: -65- How can I read an IRIX (EFS) CD-ROM on a machine which
doesn't use EFS?
Date: 18 Jun 1995 00:00:01 EST
You want 'efslook', at
ftp://viz.tamu.edu/pub/sgi/software/efslook.tar.gz.
and
! Robert E. Seastrom <rs@access4.digex.net>'s software (with source
! code) for using an SGI CD-ROM on a Macintosh is at
! ftp://bifrost.seastrom.com/pub/mac/CDROM-Jumpstart.sit151.hqx.
*/
static char buffer[6][CDIO_CD_FRAMESIZE_RAW]; /* for CD-Data */
/* Some interesting sector numbers stored in the above buffer. */
#define ISO_SUPERBLOCK_SECTOR 16 /* buffer[0] */
#define UFS_SUPERBLOCK_SECTOR 4 /* buffer[2] */
#define BOOT_SECTOR 17 /* buffer[3] */
#define VCD_INFO_SECTOR 150 /* buffer[4] */
typedef struct signature
{
unsigned int buf_num;
unsigned int offset;
const char *sig_str;
const char *description;
} signature_t;
static signature_t sigs[] =
{
/*buffer[x] off look for description */
{0, 1, "CD001", "ISO 9660"},
{0, 1, "CD-I", "CD-I"},
{0, 8, "CDTV", "CDTV"},
{0, 8, "CD-RTOS", "CD-RTOS"},
{0, 9, "CDROM", "HIGH SIERRA"},
{0, 16, "CD-BRIDGE", "BRIDGE"},
{0, 1024, "CD-XA001", "XA"},
{1, 64, "PPPPHHHHOOOOTTTTOOOO____CCCCDDDD", "PHOTO CD"},
{1, 0x438, "\x53\xef", "EXT2 FS"},
{2, 1372, "\x54\x19\x01\x0", "UFS"},
{3, 7, "EL TORITO", "BOOTABLE"},
{4, 0, "VIDEO_CD", "VIDEO CD"},
{4, 0, "SUPERVCD", "SVCD or Chaoji VCD"},
{ 0 }
};
/* The below index into the above sigs array. Make sure things match. */
#define INDEX_ISOFS 0
#define INDEX_CD_I 1
#define INDEX_CDTV 2
#define INDEX_CD_RTOS 3
#define INDEX_HS 4
#define INDEX_BRIDGE 5
#define INDEX_XA 6
#define INDEX_PHOTO_CD 7
#define INDEX_EXT2 8
#define INDEX_UFS 9
#define INDEX_BOOTABLE 10
#define INDEX_VIDEO_CD 11 /* Video CD */
#define INDEX_SVCD 12 /* CVD *or* SVCD */
/*
Read a particular block into the global array to be used for further
analysis later.
*/
static int
_cdio_read_block(CdIo *cdio, int superblock, uint32_t offset, uint8_t bufnum,
track_t track_num)
{
unsigned int track_sec_count = cdio_get_track_sec_count(cdio, track_num);
memset(buffer[bufnum], 0, CDIO_CD_FRAMESIZE);
if ( track_sec_count < superblock) {
cdio_debug("reading block %u skipped track %d has only %u sectors\n",
superblock, track_num, track_sec_count);
return -1;
}
cdio_debug("about to read sector %u\n", offset+superblock);
if (cdio_get_track_green(cdio, track_num)) {
if (0 > cdio_read_mode2_sector(cdio, buffer[bufnum],
offset+superblock, false))
return -1;
} else {
if (0 > cdio_read_yellow_sector(cdio, buffer[bufnum],
offset+superblock, false))
return -1;
}
return 0;
}
/*
Return true if the previously read-in buffer contains a "signature" that
matches index "num".
*/
static bool
_cdio_is_it(int num)
{
signature_t *sigp=&sigs[num];
int len=strlen(sigp->sig_str);
/* TODO: check that num < largest sig. */
return 0 == memcmp(&buffer[sigp->buf_num][sigp->offset], sigp->sig_str, len);
}
static int
_cdio_is_hfs(void)
{
return (0 == memcmp(&buffer[1][512],"PM",2)) ||
(0 == memcmp(&buffer[1][512],"TS",2)) ||
(0 == memcmp(&buffer[1][1024], "BD",2));
}
static int
_cdio_is_3do(void)
{
return (0 == memcmp(&buffer[1][0],"\x01\x5a\x5a\x5a\x5a\x5a\x01", 7)) &&
(0 == memcmp(&buffer[1][40], "CD-ROM", 6));
}
static int
_cdio_is_joliet(void)
{
return 2 == buffer[3][0] && buffer[3][88] == 0x25 && buffer[3][89] == 0x2f;
}
/* ISO 9660 volume space in M2F1_SECTOR_SIZE byte units */
static int
_cdio_get_iso9660_fs_sec_count(void)
{
return ((buffer[0][80] & 0xff) |
((buffer[0][81] & 0xff) << 8) |
((buffer[0][82] & 0xff) << 16) |
((buffer[0][83] & 0xff) << 24));
}
static int
_cdio_get_joliet_level( void )
{
switch (buffer[3][90]) {
case 0x40: return 1;
case 0x43: return 2;
case 0x45: return 3;
}
return 0;
}
/*
Try to determine what kind of CD-image and/or filesystem we
have at track track_num. Return information about the CD image
is returned in cdio_analysis and the return value.
*/
cdio_fs_anal_t
cdio_guess_cd_type(/*in*/ CdIo *cdio, int start_session, track_t track_num,
/*out*/ cdio_analysis_t *cdio_analysis)
{
int ret = 0;
if ( _cdio_read_block(cdio, ISO_SUPERBLOCK_SECTOR, start_session,
0, track_num) < 0 )
return CDIO_FS_UNKNOWN;
/* We have something that smells of a filesystem. */
if (_cdio_is_it(INDEX_CD_I) && _cdio_is_it(INDEX_CD_RTOS)
&& !_cdio_is_it(INDEX_BRIDGE) && !_cdio_is_it(INDEX_XA)) {
return CDIO_FS_INTERACTIVE;
} else {
/* read sector 0 ONLY, when NO greenbook CD-I !!!! */
if ( _cdio_read_block(cdio, 0, start_session, 1, track_num) < 0 )
return ret;
if (_cdio_is_it(INDEX_HS))
ret |= CDIO_FS_HIGH_SIERRA;
else if (_cdio_is_it(INDEX_ISOFS)) {
if (_cdio_is_it(INDEX_CD_RTOS) && _cdio_is_it(INDEX_BRIDGE))
ret = CDIO_FS_ISO_9660_INTERACTIVE;
else if (_cdio_is_hfs())
ret = CDIO_FS_ISO_HFS;
else
ret = CDIO_FS_ISO_9660;
cdio_analysis->isofs_size = _cdio_get_iso9660_fs_sec_count();
sprintf(cdio_analysis->iso_label, buffer[0]+40);
#if 0
if (_cdio_is_rockridge())
ret |= CDIO_FS_ANAL_ROCKRIDGE;
#endif
if (_cdio_read_block(cdio, BOOT_SECTOR, start_session, 3, track_num) < 0)
return ret;
if (_cdio_is_joliet()) {
cdio_analysis->joliet_level = _cdio_get_joliet_level();
ret |= CDIO_FS_ANAL_JOLIET;
}
if (_cdio_is_it(INDEX_BOOTABLE))
ret |= CDIO_FS_ANAL_BOOTABLE;
if (_cdio_is_it(INDEX_XA) && _cdio_is_it(INDEX_ISOFS)
&& !_cdio_is_it(INDEX_PHOTO_CD)) {
if ( _cdio_read_block(cdio, VCD_INFO_SECTOR, start_session, 4,
track_num) < 0 )
return ret;
if (_cdio_is_it(INDEX_BRIDGE) && _cdio_is_it(INDEX_CD_RTOS)) {
if (_cdio_is_it(INDEX_VIDEO_CD)) ret |= CDIO_FS_ANAL_VIDEOCDI;
else if (_cdio_is_it(INDEX_SVCD)) ret |= CDIO_FS_ANAL_SVCD;
} else if (_cdio_is_it(INDEX_SVCD)) ret |= CDIO_FS_ANAL_CVD;
}
}
else if (_cdio_is_hfs()) ret |= CDIO_FS_HFS;
else if (_cdio_is_it(INDEX_EXT2)) ret |= CDIO_FS_EXT2;
else if (_cdio_is_3do()) ret |= CDIO_FS_3DO;
else {
if ( _cdio_read_block(cdio, UFS_SUPERBLOCK_SECTOR, start_session, 2,
track_num) < 0 )
return ret;
if (_cdio_is_it(INDEX_UFS))
ret |= CDIO_FS_UFS;
else
ret |= CDIO_FS_UNKNOWN;
}
}
/* other checks */
if (_cdio_is_it(INDEX_XA)) ret |= CDIO_FS_ANAL_XA;
if (_cdio_is_it(INDEX_PHOTO_CD)) ret |= CDIO_FS_ANAL_PHOTO_CD;
if (_cdio_is_it(INDEX_CDTV)) ret |= CDIO_FS_ANAL_CDTV;
return ret;
}