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author | tpearson <tpearson@283d02a7-25f6-0310-bc7c-ecb5cbfe19da> | 2010-02-22 18:58:28 +0000 |
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committer | tpearson <tpearson@283d02a7-25f6-0310-bc7c-ecb5cbfe19da> | 2010-02-22 18:58:28 +0000 |
commit | 83b9bf0e3bfb1d842b10b80bbe749095b2c661a1 (patch) | |
tree | b05b1793361693ae88106648c2a953bed988f423 /iso/libisofs/bswap.h | |
download | krusader-83b9bf0e3bfb1d842b10b80bbe749095b2c661a1.tar.gz krusader-83b9bf0e3bfb1d842b10b80bbe749095b2c661a1.zip |
Added old KDE3 version of Krusader
git-svn-id: svn://anonsvn.kde.org/home/kde/branches/trinity/applications/krusader@1094427 283d02a7-25f6-0310-bc7c-ecb5cbfe19da
Diffstat (limited to 'iso/libisofs/bswap.h')
-rw-r--r-- | iso/libisofs/bswap.h | 94 |
1 files changed, 94 insertions, 0 deletions
diff --git a/iso/libisofs/bswap.h b/iso/libisofs/bswap.h new file mode 100644 index 0000000..95520c6 --- /dev/null +++ b/iso/libisofs/bswap.h @@ -0,0 +1,94 @@ +/* From the mplayer project (www.mplayerhq.hu) */ + +#ifndef __BSWAP_H__ +#define __BSWAP_H__ + +#ifdef HAVE_CONFIG_H +#include "config.h" +#endif + +#ifdef HAVE_BYTESWAP_H +#include <byteswap.h> +#else + +#ifdef ARCH_X86 +inline static unsigned short ByteSwap16(unsigned short x) +{ + __asm("xchgb %b0,%h0" : + "=q" (x) : + "0" (x)); + return x; +} +#define bswap_16(x) ByteSwap16(x) + +inline static unsigned int ByteSwap32(unsigned int x) +{ +#if __CPU__ > 386 + __asm("bswap %0": + "=r" (x) : +#else + __asm("xchgb %b0,%h0\n" + " rorl $16,%0\n" + " xchgb %b0,%h0": + "=q" (x) : +#endif + "0" (x)); + return x; +} +#define bswap_32(x) ByteSwap32(x) + +inline static unsigned long long int ByteSwap64(unsigned long long int x) +{ + register union { __extension__ unsigned long long int __ll; + unsigned int __l[2]; } __x; + asm("xchgl %0,%1": + "=r"(__x.__l[0]),"=r"(__x.__l[1]): + "0"(bswap_32((unsigned long)x)),"1"(bswap_32((unsigned long)(x>>32)))); + return __x.__ll; +} +#define bswap_64(x) ByteSwap64(x) + +#else + +#define bswap_16(x) (((x) & 0x00ff) << 8 | ((x) & 0xff00) >> 8) + + +/* code from bits/byteswap.h (C) 1997, 1998 Free Software Foundation, Inc. */ +#define bswap_32(x) \ + ((((x) & 0xff000000) >> 24) | (((x) & 0x00ff0000) >> 8) | \ + (((x) & 0x0000ff00) << 8) | (((x) & 0x000000ff) << 24)) + +#define bswap_64(x) \ + (__extension__ \ + ({ union { __extension__ unsigned long long int __ll; \ + unsigned int __l[2]; } __w, __r; \ + __w.__ll = (x); \ + __r.__l[0] = bswap_32 (__w.__l[1]); \ + __r.__l[1] = bswap_32 (__w.__l[0]); \ + __r.__ll; })) +#endif /* !ARCH_X86 */ + +#endif /* !HAVE_BYTESWAP_H */ + +/* + be2me ... BigEndian to MachineEndian + le2me ... LittleEndian to MachineEndian +*/ + +#ifdef WORDS_BIGENDIAN +#define be2me_16(x) (x) +#define be2me_32(x) (x) +#define be2me_64(x) (x) +#define le2me_16(x) bswap_16(x) +#define le2me_32(x) bswap_32(x) +#define le2me_64(x) bswap_64(x) +#else +#define be2me_16(x) bswap_16(x) +#define be2me_32(x) bswap_32(x) +#define be2me_64(x) bswap_64(x) +#define le2me_16(x) (x) +#define le2me_32(x) (x) +#define le2me_64(x) (x) +#endif + +#endif |