/*
$Id: bytesex.h,v 1.4 2005/02/12 09:48:18 rocky Exp $
Copyright (C) 2000, 2004 Herbert Valerio Riedel <hvr@gnu.org>
Copyright (C) 2005 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
*/
/** \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>
#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
inline static
uint16_t uint16_swap_le_be (const uint16_t val)
{
return UINT16_SWAP_LE_BE (val);
}
inline static
uint32_t uint32_swap_le_be (const uint32_t val)
{
return UINT32_SWAP_LE_BE (val);
}
inline static
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 inline uint ## bits ## _t \
uint ## bits ## _to_be (uint ## bits ## _t val) \
{ return UINT ## bits ## _TO_BE (val); } \
static 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 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 inline uint16_t
from_723 (uint32_t p)
{
if (uint32_swap_le_be (p) != p)
cdio_warn ("from_723: broken byte order");
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 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 inline uint32_t
from_733 (uint64_t p)
{
if (uint64_swap_le_be (p) != p)
cdio_warn ("from_733: broken byte order");
return (UINT32_C(0xFFFFFFFF) & p);
}
#endif /* __CDIO_BYTESEX_H__ */
/*
* Local variables:
* c-file-style: "gnu"
* tab-width: 8
* indent-tabs-mode: nil
* End:
*/
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