diff options
Diffstat (limited to 'mytimegm.c')
| -rw-r--r-- | mytimegm.c | 130 |
1 files changed, 65 insertions, 65 deletions
diff --git a/mytimegm.c b/mytimegm.c index 3d3fccd..7b63b2f 100644 --- a/mytimegm.c +++ b/mytimegm.c @@ -5,82 +5,82 @@ static long long __year_to_secs(long long year, int *is_leap) { - if (year-2ULL <= 136) { - int y = year; - int leaps = (y-68)>>2; - if (!((y-68)&3)) { - leaps--; - if (is_leap) *is_leap = 1; - } else if (is_leap) *is_leap = 0; - return 31536000*(y-70) + 86400*leaps; - } + if (year-2ULL <= 136) { + int y = year; + int leaps = (y-68)>>2; + if (!((y-68)&3)) { + leaps--; + if (is_leap) *is_leap = 1; + } else if (is_leap) *is_leap = 0; + return 31536000*(y-70) + 86400*leaps; + } - int cycles, centuries, leaps, rem; + int cycles, centuries, leaps, rem; - cycles = (year-100) / 400; - rem = (year-100) % 400; - if (rem < 0) { - cycles--; - rem += 400; - } - if (!rem) { - *is_leap = 1; - centuries = 0; - leaps = 0; - } else { - if (rem >= 200) { - if (rem >= 300) centuries = 3, rem -= 300; - else centuries = 2, rem -= 200; - } else { - if (rem >= 100) centuries = 1, rem -= 100; - else centuries = 0; - } - if (!rem) { - *is_leap = 0; - leaps = 0; - } else { - leaps = rem / 4U; - rem %= 4U; - *is_leap = !rem; - } - } + cycles = (year-100) / 400; + rem = (year-100) % 400; + if (rem < 0) { + cycles--; + rem += 400; + } + if (!rem) { + *is_leap = 1; + centuries = 0; + leaps = 0; + } else { + if (rem >= 200) { + if (rem >= 300) centuries = 3, rem -= 300; + else centuries = 2, rem -= 200; + } else { + if (rem >= 100) centuries = 1, rem -= 100; + else centuries = 0; + } + if (!rem) { + *is_leap = 0; + leaps = 0; + } else { + leaps = rem / 4U; + rem %= 4U; + *is_leap = !rem; + } + } - leaps += 97*cycles + 24*centuries - *is_leap; + leaps += 97*cycles + 24*centuries - *is_leap; - return (year-100) * 31536000LL + leaps * 86400LL + 946684800 + 86400; + return (year-100) * 31536000LL + leaps * 86400LL + 946684800 + 86400; } static int __month_to_secs(int month, int is_leap) { - static const int secs_through_month[] = { - 0, 31*86400, 59*86400, 90*86400, - 120*86400, 151*86400, 181*86400, 212*86400, - 243*86400, 273*86400, 304*86400, 334*86400 }; - int t = secs_through_month[month]; - if (is_leap && month >= 2) t+=86400; - return t; + static const int secs_through_month[] = { + 0, 31*86400, 59*86400, 90*86400, + 120*86400, 151*86400, 181*86400, 212*86400, + 243*86400, 273*86400, 304*86400, 334*86400 }; + int t = secs_through_month[month]; + if (is_leap && month >= 2) t+=86400; + return t; } time_t tm_to_secs(const struct tm *tm) { - int is_leap; - long long year = tm->tm_year; - int month = tm->tm_mon; - if (month >= 12 || month < 0) { - int adj = month / 12; - month %= 12; - if (month < 0) { - adj--; - month += 12; - } - year += adj; - } - long long t = __year_to_secs(year, &is_leap); - t += __month_to_secs(month, is_leap); - t += 86400LL * (tm->tm_mday-1); - t += 3600LL * tm->tm_hour; - t += 60LL * tm->tm_min; - t += tm->tm_sec; - return t; + int is_leap; + long long year = tm->tm_year; + int month = tm->tm_mon; + if (month >= 12 || month < 0) { + int adj = month / 12; + month %= 12; + if (month < 0) { + adj--; + month += 12; + } + year += adj; + } + long long t = __year_to_secs(year, &is_leap); + t += __month_to_secs(month, is_leap); + t += 86400LL * (tm->tm_mday-1); + t += 3600LL * tm->tm_hour; + t += 60LL * tm->tm_min; + t += tm->tm_sec; + return t; } |