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Diffstat (limited to 'libdvdread-embedded/src/bswap.h')
| -rw-r--r-- | libdvdread-embedded/src/bswap.h | 118 |
1 files changed, 118 insertions, 0 deletions
diff --git a/libdvdread-embedded/src/bswap.h b/libdvdread-embedded/src/bswap.h new file mode 100644 index 0000000..d3b2383 --- /dev/null +++ b/libdvdread-embedded/src/bswap.h @@ -0,0 +1,118 @@ +/* + * Copyright (C) 2000, 2001 Billy Biggs <vektor@dumbterm.net>, + * Håkan 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) + +#elif defined(__QNXNTO__) +#include <gulliver.h> +#define B2N_16(x) x = ENDIAN_RET16(x) +#define B2N_32(x) x = ENDIAN_RET32(x) +#define B2N_64(x) x = ENDIAN_RET64(x) + +#elif defined(__DragonFly__) +#include <sys/endian.h> +#define B2N_16(x) x = bswap16(x) +#define B2N_32(x) x = bswap32(x) +#define B2N_64(x) x = bswap64(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__) || defined(__OS2__) +#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 your system" + +#endif + +#endif /* WORDS_BIGENDIAN */ + +#endif /* LIBDVDREAD_BSWAP_H */ |