diff options
Diffstat (limited to 'taia.h')
| -rw-r--r-- | taia.h | 159 |
1 files changed, 159 insertions, 0 deletions
@@ -0,0 +1,159 @@ +#ifndef TAIA_H +#define TAIA_H + +#include <stdint.h> + +struct tai { + uint64_t x; +}; + +struct taia { + struct tai sec; + uint32_t nano; + uint32_t atto; +}; + +static inline void tai_pack(unsigned char *s, struct tai *t) +{ + uint64_t x; + + x = t->x; + + s[7] = x & 255; x >>= 8; + s[6] = x & 255; x >>= 8; + s[5] = x & 255; x >>= 8; + s[4] = x & 255; x >>= 8; + s[3] = x & 255; x >>= 8; + s[2] = x & 255; x >>= 8; + s[1] = x & 255; x >>= 8; + s[0] = x; +} + +static inline void tai_unpack(unsigned char *s, struct tai *t) +{ + uint64_t x; + + x = (unsigned char) s[0]; + x <<= 8; x += (unsigned char) s[1]; + x <<= 8; x += (unsigned char) s[2]; + x <<= 8; x += (unsigned char) s[3]; + x <<= 8; x += (unsigned char) s[4]; + x <<= 8; x += (unsigned char) s[5]; + x <<= 8; x += (unsigned char) s[6]; + x <<= 8; x += (unsigned char) s[7]; + + t->x = x; +} + +static inline void taia_pack(unsigned char *s, struct taia *t) +{ + unsigned long x; + + tai_pack(s, &t->sec); + + s += 8; + + x = t->atto; + + s[7] = x & 255; x >>= 8; + s[6] = x & 255; x >>= 8; + s[5] = x & 255; x >>= 8; + s[4] = x; + + x = t->nano; + + s[3] = x & 255; x >>= 8; + s[2] = x & 255; x >>= 8; + s[1] = x & 255; x >>= 8; + s[0] = x; +} + +static inline void taia_unpack(unsigned char *s, struct taia *t) +{ + unsigned long x; + + tai_unpack(s, &t->sec); + + s += 8; + + x = (unsigned char) s[4]; + x <<= 8; x += (unsigned char) s[5]; + x <<= 8; x += (unsigned char) s[6]; + x <<= 8; x += (unsigned char) s[7]; + + t->atto = x; + + x = (unsigned char) s[0]; + x <<= 8; x += (unsigned char) s[1]; + x <<= 8; x += (unsigned char) s[2]; + x <<= 8; x += (unsigned char) s[3]; + + t->nano = x; +} + +#define tai_unix(t, u) ((void) ((t)->x = 4611686018427387914ULL + (uint64_t) (u))) + +static inline void taia_now(struct taia *t) +{ + struct timeval now; + + gettimeofday(&now, NULL); + + tai_unix(&t->sec, now.tv_sec); + t->nano = 1000 * now.tv_usec + 500; + t->atto = secrand(); +} + +static inline void taia_sub(struct taia *res, const struct taia *u, + const struct taia *v) +{ + unsigned long unano = u->nano; + unsigned long uatto = u->atto; + + res->sec.x = u->sec.x - v->sec.x; + res->nano = unano - v->nano; + res->atto = uatto - v->atto; + + if (res->atto > uatto) { + res->atto += 1000000000UL; + --res->nano; + } + + if (res->nano > unano) { + res->nano += 1000000000UL; + --res->sec.x; + } +} + +static inline void taia_add(struct taia *res, const struct taia *u, + const struct taia *v) +{ + res->sec.x = u->sec.x + v->sec.x; + res->nano = u->nano + v->nano; + res->atto = u->atto + v->atto; + + if (res->atto > 999999999UL) { + res->atto -= 1000000000UL; + ++res->nano; + } + + if (res->nano > 999999999UL) { + res->nano -= 1000000000UL; + ++res->sec.x; + } +} + +static inline int taia_less(const struct taia *t, const struct taia *u) +{ + if (t->sec.x < u->sec.x) + return 1; + if (t->sec.x > u->sec.x) + return 0; + if (t->nano < u->nano) + return 1; + if (t->nano > u->nano) + return 0; + return t->atto < u->atto; +} + +#endif /* TAIA_H */ |