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Diffstat (limited to '')
| -rw-r--r-- | src/liblzma/check/check_byteswap.h | 43 |
1 files changed, 43 insertions, 0 deletions
diff --git a/src/liblzma/check/check_byteswap.h b/src/liblzma/check/check_byteswap.h new file mode 100644 index 00000000..264def26 --- /dev/null +++ b/src/liblzma/check/check_byteswap.h @@ -0,0 +1,43 @@ +/////////////////////////////////////////////////////////////////////////////// +// +/// \file check_byteswap.h +/// \brief Byteswapping needed by the checks +// +// This code has been put into the public domain. +// +// This library 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. +// +/////////////////////////////////////////////////////////////////////////////// + +#ifndef LZMA_CHECK_BYTESWAP_H +#define LZMA_CHECK_BYTESWAP_H + +#ifdef HAVE_CONFIG_H +# include <config.h> +#endif + +// byteswap.h is a GNU extension. It contains inline assembly versions +// for byteswapping. When byteswap.h is not available, we use generic code. +#ifdef HAVE_BYTESWAP_H +# include <byteswap.h> +#else +# define bswap_32(num) \ + ( (((num) << 24) ) \ + | (((num) << 8) & UINT32_C(0x00FF0000)) \ + | (((num) >> 8) & UINT32_C(0x0000FF00)) \ + | (((num) >> 24) ) ) + +# define bswap_64(num) \ + ( (((num) << 56) ) \ + | (((num) << 40) & UINT64_C(0x00FF000000000000)) \ + | (((num) << 24) & UINT64_C(0x0000FF0000000000)) \ + | (((num) << 8) & UINT64_C(0x000000FF00000000)) \ + | (((num) >> 8) & UINT64_C(0x00000000FF000000)) \ + | (((num) >> 24) & UINT64_C(0x0000000000FF0000)) \ + | (((num) >> 40) & UINT64_C(0x000000000000FF00)) \ + | (((num) >> 56) ) ) +#endif + +#endif |