mirror of https://github.com/pbatard/rufus.git
241 lines
7.3 KiB
C
241 lines
7.3 KiB
C
/*
|
||
Copyright (C) 2000, 2004 Herbert Valerio Riedel <hvr@gnu.org>
|
||
Copyright (C) 2005, 2008, 2012, 2015 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 bytesex.h
|
||
* \brief Generic Byte-swapping routines.
|
||
*
|
||
* Note: this header will is slated to get removed and libcdio will
|
||
* use glib.h routines instead.
|
||
*/
|
||
|
||
#ifndef CDIO_BYTESEX_H_
|
||
#define CDIO_BYTESEX_H_
|
||
|
||
#include <cdio/types.h>
|
||
#include <cdio/bytesex_asm.h> /* also defines CDIO_INLINE */
|
||
#include <cdio/logging.h>
|
||
|
||
/** 16-bit big-endian to little-endian */
|
||
#define UINT16_SWAP_LE_BE_C(val) ((uint16_t) ( \
|
||
(((uint16_t) (val) & (uint16_t) 0x00ffU) << 8) | \
|
||
(((uint16_t) (val) & (uint16_t) 0xff00U) >> 8)))
|
||
|
||
/** 32-bit big-endian to little-endian */
|
||
#define UINT32_SWAP_LE_BE_C(val) ((uint32_t) ( \
|
||
(((uint32_t) (val) & (uint32_t) 0x000000ffU) << 24) | \
|
||
(((uint32_t) (val) & (uint32_t) 0x0000ff00U) << 8) | \
|
||
(((uint32_t) (val) & (uint32_t) 0x00ff0000U) >> 8) | \
|
||
(((uint32_t) (val) & (uint32_t) 0xff000000U) >> 24)))
|
||
|
||
/** 64-bit big-endian to little-endian */
|
||
#define UINT64_SWAP_LE_BE_C(val) ((uint64_t) ( \
|
||
(((uint64_t) (val) & (uint64_t) UINT64_C(0x00000000000000ff)) << 56) | \
|
||
(((uint64_t) (val) & (uint64_t) UINT64_C(0x000000000000ff00)) << 40) | \
|
||
(((uint64_t) (val) & (uint64_t) UINT64_C(0x0000000000ff0000)) << 24) | \
|
||
(((uint64_t) (val) & (uint64_t) UINT64_C(0x00000000ff000000)) << 8) | \
|
||
(((uint64_t) (val) & (uint64_t) UINT64_C(0x000000ff00000000)) >> 8) | \
|
||
(((uint64_t) (val) & (uint64_t) UINT64_C(0x0000ff0000000000)) >> 24) | \
|
||
(((uint64_t) (val) & (uint64_t) UINT64_C(0x00ff000000000000)) >> 40) | \
|
||
(((uint64_t) (val) & (uint64_t) UINT64_C(0xff00000000000000)) >> 56)))
|
||
|
||
#ifndef UINT16_SWAP_LE_BE
|
||
# define UINT16_SWAP_LE_BE UINT16_SWAP_LE_BE_C
|
||
#endif
|
||
|
||
#ifndef UINT32_SWAP_LE_BE
|
||
# define UINT32_SWAP_LE_BE UINT32_SWAP_LE_BE_C
|
||
#endif
|
||
|
||
#ifndef UINT64_SWAP_LE_BE
|
||
# define UINT64_SWAP_LE_BE UINT64_SWAP_LE_BE_C
|
||
#endif
|
||
|
||
static CDIO_INLINE
|
||
uint16_t uint16_swap_le_be (const uint16_t val)
|
||
{
|
||
return UINT16_SWAP_LE_BE (val);
|
||
}
|
||
|
||
static CDIO_INLINE
|
||
uint32_t uint32_swap_le_be (const uint32_t val)
|
||
{
|
||
return UINT32_SWAP_LE_BE (val);
|
||
}
|
||
|
||
static CDIO_INLINE
|
||
uint64_t uint64_swap_le_be (const uint64_t val)
|
||
{
|
||
return UINT64_SWAP_LE_BE (val);
|
||
}
|
||
|
||
# define UINT8_TO_BE(val) ((uint8_t) (val))
|
||
# define UINT8_TO_LE(val) ((uint8_t) (val))
|
||
#ifdef WORDS_BIGENDIAN
|
||
# define UINT16_TO_BE(val) ((uint16_t) (val))
|
||
# define UINT16_TO_LE(val) ((uint16_t) UINT16_SWAP_LE_BE(val))
|
||
|
||
# define UINT32_TO_BE(val) ((uint32_t) (val))
|
||
# define UINT32_TO_LE(val) ((uint32_t) UINT32_SWAP_LE_BE(val))
|
||
|
||
# define UINT64_TO_BE(val) ((uint64_t) (val))
|
||
# define UINT64_TO_LE(val) ((uint64_t) UINT64_SWAP_LE_BE(val))
|
||
#else
|
||
# define UINT16_TO_BE(val) ((uint16_t) UINT16_SWAP_LE_BE(val))
|
||
# define UINT16_TO_LE(val) ((uint16_t) (val))
|
||
|
||
# define UINT32_TO_BE(val) ((uint32_t) UINT32_SWAP_LE_BE(val))
|
||
# define UINT32_TO_LE(val) ((uint32_t) (val))
|
||
|
||
# define UINT64_TO_BE(val) ((uint64_t) UINT64_SWAP_LE_BE(val))
|
||
# define UINT64_TO_LE(val) ((uint64_t) (val))
|
||
#endif
|
||
|
||
/** symmetric conversions */
|
||
#define UINT8_FROM_BE(val) (UINT8_TO_BE (val))
|
||
#define UINT8_FROM_LE(val) (UINT8_TO_LE (val))
|
||
#define UINT16_FROM_BE(val) (UINT16_TO_BE (val))
|
||
#define UINT16_FROM_LE(val) (UINT16_TO_LE (val))
|
||
#define UINT32_FROM_BE(val) (UINT32_TO_BE (val))
|
||
#define UINT32_FROM_LE(val) (UINT32_TO_LE (val))
|
||
#define UINT64_FROM_BE(val) (UINT64_TO_BE (val))
|
||
#define UINT64_FROM_LE(val) (UINT64_TO_LE (val))
|
||
|
||
/** converter function template */
|
||
#define CVT_TO_FUNC(bits) \
|
||
static CDIO_INLINE uint ## bits ## _t \
|
||
uint ## bits ## _to_be (uint ## bits ## _t val) \
|
||
{ return UINT ## bits ## _TO_BE (val); } \
|
||
static CDIO_INLINE uint ## bits ## _t \
|
||
uint ## bits ## _to_le (uint ## bits ## _t val) \
|
||
{ return UINT ## bits ## _TO_LE (val); } \
|
||
|
||
CVT_TO_FUNC(8)
|
||
CVT_TO_FUNC(16)
|
||
CVT_TO_FUNC(32)
|
||
CVT_TO_FUNC(64)
|
||
|
||
#undef CVT_TO_FUNC
|
||
|
||
#define uint8_from_be(val) (uint8_to_be (val))
|
||
#define uint8_from_le(val) (uint8_to_le (val))
|
||
#define uint16_from_be(val) (uint16_to_be (val))
|
||
#define uint16_from_le(val) (uint16_to_le (val))
|
||
#define uint32_from_be(val) (uint32_to_be (val))
|
||
#define uint32_from_le(val) (uint32_to_le (val))
|
||
#define uint64_from_be(val) (uint64_to_be (val))
|
||
#define uint64_from_le(val) (uint64_to_le (val))
|
||
|
||
/** ISO9660-related field conversion routines */
|
||
|
||
/** Convert from uint8_t to ISO 9660 7.1.1 format */
|
||
#define to_711(i) uint8_to_le(i)
|
||
|
||
/** Convert from ISO 9660 7.1.1 format to uint8_t */
|
||
#define from_711(i) uint8_from_le(i)
|
||
|
||
/** Convert from uint16_t to ISO 9669 7.2.1 format */
|
||
#define to_721(i) uint16_to_le(i)
|
||
|
||
/** Convert from ISO 9660 7.2.1 format to uint16_t */
|
||
#define from_721(i) uint16_from_le(i)
|
||
|
||
/** Convert from uint16_t to ISO 9669 7.2.2 format */
|
||
#define to_722(i) uint16_to_be(i)
|
||
|
||
/** Convert from ISO 9660 7.2.2 format to uint16_t */
|
||
#define from_722(i) uint16_from_be(i)
|
||
|
||
/** Convert from uint16_t to ISO 9669 7.2.3 format */
|
||
static CDIO_INLINE uint32_t
|
||
to_723(uint16_t i)
|
||
{
|
||
return uint32_swap_le_be(i) | i;
|
||
}
|
||
|
||
/** Convert from ISO 9660 7.2.3 format to uint16_t */
|
||
static CDIO_INLINE uint16_t
|
||
from_723 (uint32_t p)
|
||
{
|
||
uint8_t *u = (uint8_t *) &p;
|
||
/* Return the little-endian part always, to handle non-specs-compliant images */
|
||
return (u[0] | (u[1] << 8));
|
||
}
|
||
|
||
static CDIO_INLINE uint16_t
|
||
from_723_with_err (uint32_t p, bool *err)
|
||
{
|
||
if (uint32_swap_le_be (p) != p) {
|
||
cdio_warn ("from_723: broken byte order");
|
||
*err = true;
|
||
} else {
|
||
*err = false;
|
||
}
|
||
return (0xFFFF & p);
|
||
}
|
||
|
||
/** Convert from uint16_t to ISO 9669 7.3.1 format */
|
||
#define to_731(i) uint32_to_le(i)
|
||
|
||
/** Convert from ISO 9660 7.3.1 format to uint32_t */
|
||
#define from_731(i) uint32_from_le(i)
|
||
|
||
/** Convert from uint32_t to ISO 9669 7.3.2 format */
|
||
#define to_732(i) uint32_to_be(i)
|
||
|
||
/** Convert from ISO 9660 7.3.2 format to uint32_t */
|
||
#define from_732(i) uint32_from_be(i)
|
||
|
||
/** Convert from uint16_t to ISO 9669 7.3.3 format */
|
||
static CDIO_INLINE uint64_t
|
||
to_733(uint32_t i)
|
||
{
|
||
return uint64_swap_le_be(i) | i;
|
||
}
|
||
|
||
/** Convert from ISO 9660 7.3.3 format to uint32_t */
|
||
static CDIO_INLINE uint32_t
|
||
from_733 (uint64_t p)
|
||
{
|
||
uint8_t *u = (uint8_t *) &p;
|
||
/* Return the little-endian part always, to handle non-specs-compliant images */
|
||
return (u[0] | (u[1] << 8) | (u[2] << 16) | (u[3] << 24));
|
||
}
|
||
|
||
static CDIO_INLINE uint32_t
|
||
from_733_with_err (uint64_t p, bool *err)
|
||
{
|
||
if (uint64_swap_le_be (p) != p) {
|
||
cdio_warn ("from_733: broken byte order");
|
||
*err = true;
|
||
} else {
|
||
*err = false;
|
||
}
|
||
return (UINT32_C(0xFFFFFFFF) & p);
|
||
}
|
||
|
||
#endif /* CDIO_BYTESEX_H_ */
|
||
|
||
|
||
/*
|
||
* Local variables:
|
||
* c-file-style: "gnu"
|
||
* tab-width: 8
|
||
* indent-tabs-mode: nil
|
||
* End:
|
||
*/
|