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/*
* Copyright (C) 2000, 2001 Billy Biggs <vektor@dumbterm.net>,
* H책kan Hjort <d95hjort@dtek.chalmers.se>
*
* This file is part of libdvdread.
*
* libdvdread 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.
*
* libdvdread 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 libdvdread; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
#ifndef LIBDVDREAD_BSWAP_H
#define LIBDVDREAD_BSWAP_H
#include <config.h>
#if defined(WORDS_BIGENDIAN)
/* All bigendian systems are fine, just ignore the swaps. */
#define B2N_16(x) (void)(x)
#define B2N_32(x) (void)(x)
#define B2N_64(x) (void)(x)
#else
/* For __FreeBSD_version */
#if defined(HAVE_SYS_PARAM_H)
#include <sys/param.h>
#endif
#if defined(__linux__) || defined(__GLIBC__)
#include <byteswap.h>
#define B2N_16(x) x = bswap_16(x)
#define B2N_32(x) x = bswap_32(x)
#define B2N_64(x) x = bswap_64(x)
#elif defined(__APPLE__)
#include <libkern/OSByteOrder.h>
#define B2N_16(x) x = OSSwapBigToHostInt16(x)
#define B2N_32(x) x = OSSwapBigToHostInt32(x)
#define B2N_64(x) x = OSSwapBigToHostInt64(x)
#elif defined(__NetBSD__)
#include <sys/endian.h>
#define B2N_16(x) BE16TOH(x)
#define B2N_32(x) BE32TOH(x)
#define B2N_64(x) BE64TOH(x)
#elif defined(__OpenBSD__)
#include <sys/endian.h>
#define B2N_16(x) x = swap16(x)
#define B2N_32(x) x = swap32(x)
#define B2N_64(x) x = swap64(x)
#elif defined(__FreeBSD__) && __FreeBSD_version >= 470000
#include <sys/endian.h>
#define B2N_16(x) x = be16toh(x)
#define B2N_32(x) x = be32toh(x)
#define B2N_64(x) x = be64toh(x)
/* This is a slow but portable implementation, it has multiple evaluation
* problems so beware.
* Old FreeBSD's and Solaris don't have <byteswap.h> or any other such
* functionality!
*/
#elif defined(__FreeBSD__) || defined(__sun) || defined(__bsdi__) || defined(WIN32) || defined(__CYGWIN__) || defined(__BEOS__)
#define B2N_16(x) \
x = ((((x) & 0xff00) >> 8) | \
(((x) & 0x00ff) << 8))
#define B2N_32(x) \
x = ((((x) & 0xff000000) >> 24) | \
(((x) & 0x00ff0000) >> 8) | \
(((x) & 0x0000ff00) << 8) | \
(((x) & 0x000000ff) << 24))
#define B2N_64(x) \
x = ((((x) & 0xff00000000000000ULL) >> 56) | \
(((x) & 0x00ff000000000000ULL) >> 40) | \
(((x) & 0x0000ff0000000000ULL) >> 24) | \
(((x) & 0x000000ff00000000ULL) >> 8) | \
(((x) & 0x00000000ff000000ULL) << 8) | \
(((x) & 0x0000000000ff0000ULL) << 24) | \
(((x) & 0x000000000000ff00ULL) << 40) | \
(((x) & 0x00000000000000ffULL) << 56))
#else
/* If there isn't a header provided with your system with this functionality
* add the relevant || define( ) to the portable implementation above.
*/
#error "You need to add endian swap macros for you're system"
#endif
#endif /* WORDS_BIGENDIAN */
#endif /* LIBDVDREAD_BSWAP_H */