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#include "../internal.h"
/* Run-time endianness detection is easier and more reliable than trying to
* figure it out from preprocessor defines. A sane compiler should optimize the
* run-time code away when inlined, so there should be no overhead from
* checking endianness. */
static inline bool ypc__bigendian() {
union { uint16_t l; char c[2]; } u;
u.l = 1;
return u.c[0] == 0;
}
static inline uint16_t ypc__swap16(uint16_t v) {
#if defined(_MSC_VER)
return _byteswap_short(v);
#else
return (v>>8) | (v<<8);
#endif
}
static inline uint32_t ypc__swap32(uint32_t v) {
#if defined(_MSC_VER)
return _byteswap_ulong(v);
#elif __GNUC__ > 4 || (__GNUC__ == 4 && __GNUC_MINOR__ >= 3)
return __builtin_bswap32(v);
#else
return ypc__swap16(v >> 16) | ((uint32_t)ypc__swap16(v) << 16);
#endif
}
static inline uint64_t ypc__swap64(uint64_t v) {
#if defined(_MSC_VER)
return _byteswap_uint64(v);
#elif __GNUC__ > 4 || (__GNUC__ == 4 && __GNUC_MINOR__ >= 3)
return __builtin_bswap64(v);
#else
return ypc__swap32(v >> 32) | ((uint64_t)ypc__swap32(v) << 32);
#endif
}
/* Conversion between host<->network byte order */
static inline uint16_t ypc__hn16(uint16_t v) { return ypc__bigendian() ? v : ypc__swap16(v); }
static inline uint32_t ypc__hn32(uint32_t v) { return ypc__bigendian() ? v : ypc__swap32(v); }
static inline uint64_t ypc__hn64(uint64_t v) { return ypc__bigendian() ? v : ypc__swap64(v); }
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