diff options
Diffstat (limited to 'dvdread/bswap.h')
| -rw-r--r-- | dvdread/bswap.h | 126 |
1 files changed, 126 insertions, 0 deletions
diff --git a/dvdread/bswap.h b/dvdread/bswap.h new file mode 100644 index 0000000..11c9774 --- /dev/null +++ b/dvdread/bswap.h @@ -0,0 +1,126 @@ +/* -*- c-basic-offset: 2; indent-tabs-mode: nil -*- */ +#ifndef BSWAP_H_INCLUDED +#define BSWAP_H_INCLUDED + +/* + * Copyright (C) 2000, 2001 Billy Biggs <vektor@dumbterm.net>, + * Håkan Hjort <d95hjort@dtek.chalmers.se> + * + * 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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA + */ + +#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__) +#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(__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) +#if __FreeBSD_version >= 500000 +#define B2N_64(x) x = be64toh(x) +#else +#define B2N_64(x) \ + x = ((((x) & 0xff00000000000000) >> 56) | \ + (((x) & 0x00ff000000000000) >> 40) | \ + (((x) & 0x0000ff0000000000) >> 24) | \ + (((x) & 0x000000ff00000000) >> 8) | \ + (((x) & 0x00000000ff000000) << 8) | \ + (((x) & 0x0000000000ff0000) << 24) | \ + (((x) & 0x000000000000ff00) << 40) | \ + (((x) & 0x00000000000000ff) << 56)) +#endif /* _FreeBSD_version >= 500000 */ + +#elif defined(__DragonFly__) +#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(__APPLE__) || defined(__DARWIN__) +#include <libkern/OSByteOrder.h> +#define B2N_16(x) x = OSSwapBigToHostConstInt16(x) +#define B2N_32(x) x = OSSwapBigToHostConstInt32(x) +#define B2N_64(x) x = OSSwapBigToHostConstInt64(x) + +#else +#if defined(__FreeBSD__) || defined(__sun) || defined(__bsdi__) || defined(WIN32) || defined(__BEOS__) || defined(__INTERIX) +/* These systems don't have swap macros */ +#else +/* If there isn't a header provided with your system with this functionality + * add the relevant || define( ) to the list above. + */ +#warning "You should add endian swap macros for your system" +#endif + +/* 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! + */ + +#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) & 0xff00000000000000) >> 56) | \ + (((x) & 0x00ff000000000000) >> 40) | \ + (((x) & 0x0000ff0000000000) >> 24) | \ + (((x) & 0x000000ff00000000) >> 8) | \ + (((x) & 0x00000000ff000000) << 8) | \ + (((x) & 0x0000000000ff0000) << 24) | \ + (((x) & 0x000000000000ff00) << 40) | \ + (((x) & 0x00000000000000ff) << 56)) + + + +#endif + +#endif /* WORDS_BIGENDIAN */ + +#endif /* BSWAP_H_INCLUDED */ |