mirror of
https://github.com/pbatard/rufus.git
synced 2025-05-20 09:55:11 -04:00
[iso] initial ISO image support (EXPERIMENTAL)
* from libcdio: http://www.gnu.org/software/libcdio/
This commit is contained in:
Pete Batard
parent
9d2f9faa70
commit
5bd86bc743
93 changed files with 18908 additions and 676 deletions
328
src/libcdio/driver/read.c
Normal file
328
src/libcdio/driver/read.c
Normal file
|
|
@ -0,0 +1,328 @@
|
|||
/*
|
||||
Copyright (C) 2005, 2008, 2011 Rocky Bernstein <rocky@gnu.org>
|
||||
|
||||
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 3 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, see <http://www.gnu.org/licenses/>.
|
||||
*/
|
||||
/** \file read.h
|
||||
*
|
||||
* \brief sector (block, frame)-related libcdio routines.
|
||||
*/
|
||||
|
||||
|
||||
#ifdef HAVE_CONFIG_H
|
||||
# include "config.h"
|
||||
# define __CDIO_CONFIG_H__ 1
|
||||
#endif
|
||||
|
||||
#include <cdio/cdio.h>
|
||||
#include <cdio/logging.h>
|
||||
#include "cdio_private.h"
|
||||
#include "cdio_assert.h"
|
||||
|
||||
#ifdef HAVE_STRING_H
|
||||
#include <string.h>
|
||||
#endif
|
||||
|
||||
#define check_read_parms(p_cdio, p_buf, i_lsn) \
|
||||
if (!p_cdio) return DRIVER_OP_UNINIT; \
|
||||
if (!p_buf || CDIO_INVALID_LSN == i_lsn) \
|
||||
return DRIVER_OP_ERROR;
|
||||
|
||||
#define check_lsn(i_lsn) \
|
||||
check_read_parms(p_cdio, p_buf, i_lsn); \
|
||||
{ \
|
||||
lsn_t end_lsn = \
|
||||
cdio_get_track_lsn(p_cdio, CDIO_CDROM_LEADOUT_TRACK); \
|
||||
if ( i_lsn > end_lsn ) { \
|
||||
cdio_info("Trying to access past end of disk lsn: %ld, end lsn: %ld", \
|
||||
(long int) i_lsn, (long int) end_lsn); \
|
||||
return DRIVER_OP_ERROR; \
|
||||
} \
|
||||
}
|
||||
|
||||
#define check_lsn_blocks(i_lsn, i_blocks) \
|
||||
check_read_parms(p_cdio, p_buf, i_lsn); \
|
||||
{ \
|
||||
lsn_t end_lsn = \
|
||||
cdio_get_track_lsn(p_cdio, CDIO_CDROM_LEADOUT_TRACK); \
|
||||
if ( i_lsn > end_lsn ) { \
|
||||
cdio_info("Trying to access past end of disk lsn: %ld, end lsn: %ld", \
|
||||
(long int) i_lsn, (long int) end_lsn); \
|
||||
return DRIVER_OP_ERROR; \
|
||||
} \
|
||||
/* Care is used in the expression below to be correct with */ \
|
||||
/* respect to unsigned integers. */ \
|
||||
if ( i_lsn + i_blocks > end_lsn + 1 ) { \
|
||||
cdio_info("Request truncated to end disk; lsn: %ld, end lsn: %ld", \
|
||||
(long int) i_lsn, (long int) end_lsn); \
|
||||
i_blocks = end_lsn - i_lsn + 1; \
|
||||
} \
|
||||
}
|
||||
|
||||
/*!
|
||||
lseek - reposition read/write file offset
|
||||
Returns (off_t) -1 on error.
|
||||
Similar to (if not the same as) libc's lseek()
|
||||
*/
|
||||
off_t
|
||||
cdio_lseek (const CdIo_t *p_cdio, off_t offset, int whence)
|
||||
{
|
||||
if (!p_cdio) return DRIVER_OP_UNINIT;
|
||||
|
||||
if (p_cdio->op.lseek)
|
||||
return (p_cdio->op.lseek) (p_cdio->env, offset, whence);
|
||||
return DRIVER_OP_UNSUPPORTED;
|
||||
}
|
||||
|
||||
/*! Reads into buf the next size bytes. Similar to (if not the
|
||||
same as) libc's read(). This is a "cooked" read, or one handled by
|
||||
the OS. It probably won't work on audio data. For that use
|
||||
cdio_read_audio_sector(s).
|
||||
|
||||
@param p_cdio object to read from
|
||||
@param p_buf place to read data into. The caller should make sure
|
||||
this location can store at least i_size bytes.
|
||||
@param i_size number of bytes to read
|
||||
|
||||
@return (ssize_t) -1 on error.
|
||||
*/
|
||||
ssize_t
|
||||
cdio_read (const CdIo_t *p_cdio, void *p_buf, size_t i_size)
|
||||
{
|
||||
if (!p_cdio) return DRIVER_OP_UNINIT;
|
||||
|
||||
if (p_cdio->op.read)
|
||||
return (p_cdio->op.read) (p_cdio->env, p_buf, i_size);
|
||||
return DRIVER_OP_UNSUPPORTED;
|
||||
}
|
||||
|
||||
/*!
|
||||
Reads an audio sector from cd device into data starting
|
||||
from lsn. Returns DRIVER_OP_SUCCESS if no error.
|
||||
*/
|
||||
driver_return_code_t
|
||||
cdio_read_audio_sector (const CdIo_t *p_cdio, void *p_buf, lsn_t i_lsn)
|
||||
{
|
||||
check_lsn(i_lsn);
|
||||
if (p_cdio->op.read_audio_sectors)
|
||||
return p_cdio->op.read_audio_sectors (p_cdio->env, p_buf, i_lsn, 1);
|
||||
return DRIVER_OP_UNSUPPORTED;
|
||||
}
|
||||
|
||||
/*!
|
||||
Reads audio sectors from cd device into data starting
|
||||
from lsn. Returns DRIVER_OP_SUCCESS if no error.
|
||||
*/
|
||||
driver_return_code_t
|
||||
cdio_read_audio_sectors (const CdIo_t *p_cdio, void *p_buf, lsn_t i_lsn,
|
||||
uint32_t i_blocks)
|
||||
{
|
||||
check_lsn_blocks(i_lsn, i_blocks);
|
||||
|
||||
if (0 == i_blocks) return DRIVER_OP_SUCCESS;
|
||||
|
||||
if (p_cdio->op.read_audio_sectors)
|
||||
return (p_cdio->op.read_audio_sectors) (p_cdio->env, p_buf, i_lsn,
|
||||
i_blocks);
|
||||
return DRIVER_OP_UNSUPPORTED;
|
||||
}
|
||||
|
||||
/*!
|
||||
Reads an audio sector from cd device into data starting
|
||||
from lsn. Returns DRIVER_OP_SUCCESS if no error.
|
||||
*/
|
||||
driver_return_code_t
|
||||
cdio_read_data_sectors (const CdIo_t *p_cdio, void *p_buf, lsn_t i_lsn,
|
||||
uint16_t i_blocksize, uint32_t i_blocks)
|
||||
{
|
||||
check_lsn(i_lsn);
|
||||
|
||||
if (0 == i_blocks) return DRIVER_OP_SUCCESS;
|
||||
|
||||
if (p_cdio->op.read_data_sectors)
|
||||
return p_cdio->op.read_data_sectors (p_cdio->env, p_buf, i_lsn,
|
||||
i_blocksize, i_blocks);
|
||||
return DRIVER_OP_UNSUPPORTED;
|
||||
}
|
||||
|
||||
|
||||
#ifndef SEEK_SET
|
||||
#define SEEK_SET 0
|
||||
#endif
|
||||
|
||||
/*!
|
||||
Reads a single mode1 form1 or form2 sector from cd device
|
||||
into data starting from lsn. Returns DRIVER_OP_SUCCESS if no error.
|
||||
*/
|
||||
driver_return_code_t
|
||||
cdio_read_mode1_sector (const CdIo_t *p_cdio, void *p_buf, lsn_t i_lsn,
|
||||
bool b_form2)
|
||||
{
|
||||
uint32_t size = b_form2 ? M2RAW_SECTOR_SIZE : CDIO_CD_FRAMESIZE ;
|
||||
|
||||
check_lsn(i_lsn);
|
||||
if (p_cdio->op.read_mode1_sector) {
|
||||
return p_cdio->op.read_mode1_sector(p_cdio->env, p_buf, i_lsn, b_form2);
|
||||
} else if (p_cdio->op.lseek && p_cdio->op.read) {
|
||||
char buf[M2RAW_SECTOR_SIZE] = { 0, };
|
||||
if (0 > cdio_lseek(p_cdio, CDIO_CD_FRAMESIZE*i_lsn, SEEK_SET))
|
||||
return -1;
|
||||
if (0 > cdio_read(p_cdio, buf, CDIO_CD_FRAMESIZE))
|
||||
return -1;
|
||||
memcpy (p_buf, buf, size);
|
||||
return DRIVER_OP_SUCCESS;
|
||||
}
|
||||
|
||||
return DRIVER_OP_UNSUPPORTED;
|
||||
}
|
||||
|
||||
/*!
|
||||
Reads mode 1 sectors
|
||||
|
||||
@param p_cdio object to read from
|
||||
@param buf place to read data into
|
||||
@param lsn sector to read
|
||||
@param b_form2 true for reading mode 1 form 2 sectors or false for
|
||||
mode 1 form 1 sectors.
|
||||
@param i_blocks number of sectors to read
|
||||
*/
|
||||
driver_return_code_t
|
||||
cdio_read_mode1_sectors (const CdIo_t *p_cdio, void *p_buf, lsn_t i_lsn,
|
||||
bool b_form2, uint32_t i_blocks)
|
||||
{
|
||||
check_lsn_blocks(i_lsn, i_blocks);
|
||||
|
||||
if (0 == i_blocks) return DRIVER_OP_SUCCESS;
|
||||
|
||||
if (p_cdio->op.read_mode1_sectors)
|
||||
return (p_cdio->op.read_mode1_sectors) (p_cdio->env, p_buf, i_lsn, b_form2,
|
||||
i_blocks);
|
||||
return DRIVER_OP_UNSUPPORTED;
|
||||
}
|
||||
|
||||
/*!
|
||||
Reads a mode 2 sector
|
||||
|
||||
@param p_cdio object to read from
|
||||
@param buf place to read data into
|
||||
@param lsn sector to read
|
||||
@param b_form2 true for reading mode 2 form 2 sectors or false for
|
||||
mode 2 form 1 sectors.
|
||||
*/
|
||||
driver_return_code_t
|
||||
cdio_read_mode2_sector (const CdIo_t *p_cdio, void *p_buf, lsn_t i_lsn,
|
||||
bool b_form2)
|
||||
{
|
||||
check_lsn(i_lsn);
|
||||
if (p_cdio->op.read_mode2_sector)
|
||||
return p_cdio->op.read_mode2_sector (p_cdio->env, p_buf, i_lsn, b_form2);
|
||||
|
||||
/* fallback */
|
||||
if (p_cdio->op.read_mode2_sectors != NULL)
|
||||
return cdio_read_mode2_sectors (p_cdio, p_buf, i_lsn, b_form2, 1);
|
||||
return DRIVER_OP_UNSUPPORTED;
|
||||
}
|
||||
|
||||
/*!
|
||||
Reads mode 2 sectors
|
||||
|
||||
@param p_cdio object to read from
|
||||
@param buf place to read data into
|
||||
@param lsn sector to read
|
||||
@param b_form2 true for reading mode2 form 2 sectors or false for
|
||||
mode 2 form 1 sectors.
|
||||
@param i_blocks number of sectors to read
|
||||
*/
|
||||
driver_return_code_t
|
||||
cdio_read_mode2_sectors (const CdIo_t *p_cdio, void *p_buf, lsn_t i_lsn,
|
||||
bool b_form2, uint32_t i_blocks)
|
||||
{
|
||||
check_lsn_blocks(i_lsn, i_blocks);
|
||||
|
||||
if (0 == i_blocks) return DRIVER_OP_SUCCESS;
|
||||
|
||||
if (p_cdio->op.read_mode2_sectors)
|
||||
return (p_cdio->op.read_mode2_sectors) (p_cdio->env, p_buf, i_lsn,
|
||||
b_form2, i_blocks);
|
||||
return DRIVER_OP_UNSUPPORTED;
|
||||
|
||||
}
|
||||
|
||||
|
||||
/** The special case of reading a single block is a common one so we
|
||||
provide a routine for that as a convenience.
|
||||
*/
|
||||
driver_return_code_t
|
||||
cdio_read_sector(const CdIo_t *p_cdio, void *p_buf, lsn_t i_lsn,
|
||||
cdio_read_mode_t read_mode)
|
||||
{
|
||||
return cdio_read_sectors(p_cdio, p_buf, i_lsn, read_mode, 1);
|
||||
}
|
||||
|
||||
/*!
|
||||
Reads a number of sectors (AKA blocks).
|
||||
|
||||
@param p_buf place to read data into. The caller should make sure
|
||||
this location is large enough. See below for size information.
|
||||
@param read_mode the kind of "mode" to use in reading.
|
||||
@param i_lsn sector to read
|
||||
@param i_blocks number of sectors to read
|
||||
@return DRIVER_OP_SUCCESS (0) if no error, other (negative) enumerations
|
||||
are returned on error.
|
||||
|
||||
If read_mode is CDIO_MODE_AUDIO,
|
||||
*p_buf should hold at least CDIO_FRAMESIZE_RAW * i_blocks bytes.
|
||||
|
||||
If read_mode is CDIO_MODE_DATA,
|
||||
*p_buf should hold at least i_blocks times either ISO_BLOCKSIZE,
|
||||
M1RAW_SECTOR_SIZE or M2F2_SECTOR_SIZE depending on the kind of
|
||||
sector getting read. If you don't know whether you have a Mode 1/2,
|
||||
Form 1/ Form 2/Formless sector best to reserve space for the maximum
|
||||
which is M2RAW_SECTOR_SIZE.
|
||||
|
||||
If read_mode is CDIO_MODE_M2F1,
|
||||
*p_buf should hold at least M2RAW_SECTOR_SIZE * i_blocks bytes.
|
||||
|
||||
If read_mode is CDIO_MODE_M2F2,
|
||||
*p_buf should hold at least CDIO_CD_FRAMESIZE * i_blocks bytes.
|
||||
|
||||
|
||||
*/
|
||||
driver_return_code_t
|
||||
cdio_read_sectors(const CdIo_t *p_cdio, void *p_buf, lsn_t i_lsn,
|
||||
cdio_read_mode_t read_mode, uint32_t i_blocks)
|
||||
{
|
||||
switch(read_mode) {
|
||||
case CDIO_READ_MODE_AUDIO:
|
||||
return cdio_read_audio_sectors (p_cdio, p_buf, i_lsn, i_blocks);
|
||||
case CDIO_READ_MODE_M1F1:
|
||||
return cdio_read_mode1_sectors (p_cdio, p_buf, i_lsn, false, i_blocks);
|
||||
case CDIO_READ_MODE_M1F2:
|
||||
return cdio_read_mode1_sectors (p_cdio, p_buf, i_lsn, true, i_blocks);
|
||||
case CDIO_READ_MODE_M2F1:
|
||||
return cdio_read_mode2_sectors (p_cdio, p_buf, i_lsn, false, i_blocks);
|
||||
case CDIO_READ_MODE_M2F2:
|
||||
return cdio_read_mode2_sectors (p_cdio, p_buf, i_lsn, true, i_blocks);
|
||||
}
|
||||
/* Can't happen. Just to shut up gcc. */
|
||||
return DRIVER_OP_ERROR;
|
||||
}
|
||||
|
||||
/*
|
||||
* Local variables:
|
||||
* c-file-style: "gnu"
|
||||
* tab-width: 8
|
||||
* indent-tabs-mode: nil
|
||||
* End:
|
||||
*/
|
||||
Loading…
Add table
Add a link
Reference in a new issue