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#ifndef __BSWAP_H__
#define __BSWAP_H__
#ifdef HAVE_BYTESWAP_H
#include <byteswap.h>
#else
#include <inttypes.h>
#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 long 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)
#define bswap_32(x) \
((((x) & 0xff000000) >> 24) | (((x) & 0x00ff0000) >> 8) | \
(((x) & 0x0000ff00) << 8) | (((x) & 0x000000ff) << 24))
#ifdef __GNUC__
/* code from bits/byteswap.h (C) 1997, 1998 Free Software Foundation, Inc. */
#define bswap_64(x) \
(__extension__ \
({ union { __extension__ unsigned long long int __ll; \
unsigned long 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; }))
#else
#define bswap_64(x) \
((((x) & 0xff00000000000000LL) >> 56) | \
(((x) & 0x00ff000000000000LL) >> 40) | \
(((x) & 0x0000ff0000000000LL) >> 24) | \
(((x) & 0x000000ff00000000LL) >> 8) | \
(((x) & 0x00000000ff000000LL) << 8) | \
(((x) & 0x0000000000ff0000LL) << 24) | \
(((x) & 0x000000000000ff00LL) << 40) | \
(((x) & 0x00000000000000ffLL) << 56))
#endif /* !__GNUC__ */
#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
#define ABE_16(x) (be2me_16(*(uint16_t*)(x)))
#define ABE_32(x) (be2me_32(*(uint32_t*)(x)))
#define ABE_64(x) (be2me_64(*(uint64_t*)(x)))
#define ALE_16(x) (le2me_16(*(uint16_t*)(x)))
#define ALE_32(x) (le2me_32(*(uint32_t*)(x)))
#define ALE_64(x) (le2me_64(*(uint64_t*)(x)))
#ifdef ARCH_X86
#define BE_16(x) ABE_16(x)
#define BE_32(x) ABE_32(x)
#define BE_64(x) ABE_64(x)
#define LE_16(x) ALE_16(x)
#define LE_32(x) ALE_32(x)
#define LE_64(x) ALE_64(x)
#else
#define BE_16(x) ((((uint8_t*)(x))[0] << 8) | ((uint8_t*)(x))[1])
#define BE_32(x) ((((uint8_t*)(x))[0] << 24) | \
(((uint8_t*)(x))[1] << 16) | \
(((uint8_t*)(x))[2] << 8) | \
((uint8_t*)(x))[3])
#define BE_64(x) ((uint64_t)(((uint8_t*)(x))[0] << 56) | \
(uint64_t)(((uint8_t*)(x))[1] << 48) | \
(uint64_t)(((uint8_t*)(x))[2] << 40) | \
(uint64_t)(((uint8_t*)(x))[3] << 32) | \
(uint64_t)(((uint8_t*)(x))[4] << 24) | \
(uint64_t)(((uint8_t*)(x))[5] << 16) | \
(uint64_t)(((uint8_t*)(x))[6] << 8) | \
(uint64_t)((uint8_t*)(x))[7])
#define LE_16(x) ((((uint8_t*)(x))[1] << 8) | ((uint8_t*)(x))[0])
#define LE_32(x) ((((uint8_t*)(x))[3] << 24) | \
(((uint8_t*)(x))[2] << 16) | \
(((uint8_t*)(x))[1] << 8) | \
((uint8_t*)(x))[0])
#define LE_64(x) ((uint64_t)(((uint8_t*)(x))[7] << 56) | \
(uint64_t)(((uint8_t*)(x))[6] << 48) | \
(uint64_t)(((uint8_t*)(x))[5] << 40) | \
(uint64_t)(((uint8_t*)(x))[4] << 32) | \
(uint64_t)(((uint8_t*)(x))[3] << 24) | \
(uint64_t)(((uint8_t*)(x))[2] << 16) | \
(uint64_t)(((uint8_t*)(x))[1] << 8) | \
(uint64_t)((uint8_t*)(x))[0])
#endif /* !ARCH_X86 */
#ifdef WORDS_BIGENDIAN
#define ME_16(x) BE_16(x)
#define ME_32(x) BE_32(x)
#define ME_64(x) BE_64(x)
#define AME_16(x) ABE_16(x)
#define AME_32(x) ABE_32(x)
#define AME_64(x) ABE_64(x)
#else
#define ME_16(x) LE_16(x)
#define ME_32(x) LE_32(x)
#define ME_64(x) LE_64(x)
#define AME_16(x) ALE_16(x)
#define AME_32(x) ALE_32(x)
#define AME_64(x) ALE_64(x)
#endif
#define BE_FOURCC( ch0, ch1, ch2, ch3 ) \
( (uint32_t)(unsigned char)(ch3) | \
( (uint32_t)(unsigned char)(ch2) << 8 ) | \
( (uint32_t)(unsigned char)(ch1) << 16 ) | \
( (uint32_t)(unsigned char)(ch0) << 24 ) )
#define LE_FOURCC( ch0, ch1, ch2, ch3 ) \
( (uint32_t)(unsigned char)(ch0) | \
( (uint32_t)(unsigned char)(ch1) << 8 ) | \
( (uint32_t)(unsigned char)(ch2) << 16 ) | \
( (uint32_t)(unsigned char)(ch3) << 24 ) )
#ifdef WORDS_BIGENDIAN
#define ME_FOURCC BE_FOURCC
#else
#define ME_FOURCC LE_FOURCC
#endif
#endif
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