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/*
Copyright (C) 1997 Free Software Foundation, Inc.
Written by Thomas Bushnell, n/BSG.
This file is part of the GNU Hurd.
The GNU Hurd 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, or (at
your option) any later version.
The GNU Hurd 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, USA. */
/* Specification of ISO 9660 format */
/* Volume descriptor */
struct voldesc
{
unsigned char type;
unsigned char id[5];
unsigned char version;
unsigned char data[0];
};
/* Volume descriptor types */
#define VOLDESC_PRIMARY 1
#define VOLDESC_END 255
/* We don't support any other types */
/* Expected ID */
#define ISO_STANDARD_ID "CD001"
/* Primary descriptor */
struct sblock
{
unsigned char type;
unsigned char id[5];
unsigned char version;
unsigned char skip1;
unsigned char sysid[32];
unsigned char volid[32];
unsigned char skip2[8];
unsigned char vol_sp_size[8]; /* total number of logical blocks */
unsigned char skip[32];
unsigned char vol_set_size[4];
unsigned char vol_seqno[4];
unsigned char blksize[4]; /* logical block size */
unsigned char ptsize[8];
unsigned char type_l_pt[4];
unsigned char opt_type_l_pt[4];
unsigned char type_m_pt[4];
unsigned char opt_type_m_pt[4];
unsigned char root[34];
unsigned char volset_id[128];
unsigned char pub_id[128];
unsigned char prep_id[128];
unsigned char app_id[128];
unsigned char copyr_id[37];
unsigned char abstr_id[37];
unsigned char biblio_id[37];
unsigned char creation_time[17];
unsigned char mod_time[17];
unsigned char expir_time[17];
unsigned char effect_time[17];
unsigned char file_structure;
unsigned char skip4;
unsigned char appl_data[512];
unsigned char skip5[652];
};
/* Directory record */
struct dirrect
{
unsigned char len;
unsigned char ext_attr_len;
unsigned char extent[8];
unsigned char size[8];
unsigned char date[7];
unsigned char flags;
unsigned char file_unit_size;
unsigned char ileave;
unsigned char vol_seqno[4];
unsigned char namelen;
unsigned char name[0];
};
/* Numeric conversions for these fields */
#include <endian.h>
static inline unsigned int
isonum_733 (unsigned char *addr)
{
#if BYTE_ORDER == LITTLE_ENDIAN
return *(unsigned int *)addr;
#elif BYTE_ORDER == BIG_ENDIAN
return *(unsigned int *)(addr + 4);
#else
return
addr[0] | (addr[1] << 8) | (addr[2] << 16) | (addr[3] << 24);
#endif
}
static inline unsigned int
isonum_723 (unsigned char *addr)
{
#if BYTE_ORDER == LITTLE_ENDIAN
return *(unsigned short *)addr;
#elif BYTE_ORDER == BIG_ENDIAN
return *(unsigned short *)addr + 2;
#else
return addr[0] | (addr[1] << 8);
#endif
}
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