2 * Let's make sure we always have a sane definition for ntohl()/htonl().
3 * Some libraries define those as a function call, just to perform byte
4 * shifting, bringing significant overhead to what should be a simple
11 * Default version that the compiler ought to optimize properly with
14 GIT_INLINE(uint32_t) default_swab32(uint32_t val
)
16 return (((val
& 0xff000000) >> 24) |
17 ((val
& 0x00ff0000) >> 8) |
18 ((val
& 0x0000ff00) << 8) |
19 ((val
& 0x000000ff) << 24));
24 #if defined(__GNUC__) && (defined(__i386__) || defined(__x86_64__))
26 #define bswap32(x) ({ \
28 if (__builtin_constant_p(x)) { \
29 __res = default_swab32(x); \
31 __asm__("bswap %0" : "=r" (__res) : "0" ((uint32_t)(x))); \
35 #elif defined(_MSC_VER) && (defined(_M_IX86) || defined(_M_X64))
39 #define bswap32(x) _byteswap_ulong(x)
47 #define ntohl(x) bswap32(x)
48 #define htonl(x) bswap32(x)