/
utils.h
113 lines (98 loc) · 2.4 KB
/
utils.h
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#ifndef __UTILS_H_
#define __UTILS_H_
#if defined( __amd64__ ) || defined( _M_AMD64 )
# define ARCH_X86_64
# define __CPU__ 686
#elif defined( _M_IX86 )//msvs, intel, digital mars, watcom
# if ! defined( __386__ )
# error "unsupported target: 16-bit x86"
# endif
# define ARCH_X86
# define __CPU__ ( _M_IX86 + 86 )
#elif defined( __i686__ )//gnu c
# define ARCH_X86
# define __CPU__ 686
#elif defined( __i586__ )//gnu c
# define ARCH_X86
# define __CPU__ 586
#elif defined( __i486__ )//gnu c
# define ARCH_X86
# define __CPU__ 486
#elif defined( __i386__ )//gnu c
# define ARCH_X86
# define __CPU__ 386
#else
# error "unknown architecture"
#endif
char *uint2str(char *dest, size_t len, uint64_t num, uint32_t base);
int str2int(char *str, size_t len, int64_t *res, uint32_t base);
int isdigit_base(char c, int base);
#ifdef ARCH_X86_64
# define LEGACY_REGS "=Q"
#else
# define LEGACY_REGS "=q"
#endif
#if !defined(__INTEL_COMPILER) && (defined(ARCH_X86) || defined(ARCH_X86_64))
STATIC_INLINE u_int16_t ByteSwap16(u_int16_t x)
{
__asm("xchgb %b0,%h0" :
LEGACY_REGS (x) :
"0" (x));
return x;
}
#define bswap_16(x) ByteSwap16(x)
STATIC_INLINE u_int32_t ByteSwap32(u_int32_t x)
{
#if __CPU__ > 386
__asm("bswap %0":
"=r" (x) :
#else
__asm("xchgb %b0,%h0\n"\
" rorl $16,%0\n"
" xchgb %b0,%h0":
LEGACY_REGS (x) :
#endif
"0" (x));
return x;
}
#define bswap_32(x) ByteSwap32(x)
STATIC_INLINE u_int64_t ByteSwap64(u_int64_t x)
{
#ifdef ARCH_X86_64
__asm("bswap %0":
"=r" (x) :
"0" (x));
return x;
#else
register union { __extension__ u_int64_t __ll;
u_int32_t __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;
#endif
}
#define bswap_64(x) ByteSwap64(x)
#else
#define bswap_16(x) (((x) & 0x00ff) << 8 | ((x) & 0xff00) >> 8)
#ifdef __INTEL_COMPILER
#define bswap_32(x) _bswap(x)
#else
#define bswap_32(x) \
((((x) & 0xff000000) >> 24) | (((x) & 0x00ff0000) >> 8) | \
(((x) & 0x0000ff00) << 8) | (((x) & 0x000000ff) << 24))
#endif
STATIC_INLINE u_int64_t ByteSwap64(u_int64_t x)
{
union {
u_int64_t ll;
u_int32_t l[2];
} w, r;
w.ll = x;
r.l[0] = bswap_32 (w.l[1]);
r.l[1] = bswap_32 (w.l[0]);
return r.ll;
}
#define bswap_64(x) ByteSwap64(x)
#endif
#endif