struct tm *localtime_r(const time_t *t, struct tm *result)
{
__tzset();
__time_to_tm(*t - __timezone, result);
result->tm_isdst = -1;
return __dst_adjust(result);
}
struct tm *__dst_adjust(struct tm *tm)
{
time_t t;
int start, end, secs;
int after_start, before_end;
if (tm->tm_isdst >= 0) return tm;
if (!__daylight) {
tm->tm_isdst = 0;
return tm;
}
secs = tm->tm_hour*3600 + tm->tm_min*60 + tm->tm_sec;
start = cutoff_yday(tm, &__dst_start);
end = cutoff_yday(tm, &__dst_end);
after_start = (tm->tm_yday > start || (tm->tm_yday == start && secs >= __dst_start.time));
before_end = (tm->tm_yday < end || (tm->tm_yday == end && secs < __dst_end.time));
if ((after_start && before_end) || ((end < start) && (after_start || before_end))) {
tm->tm_sec -= __dst_offset;
tm->tm_isdst = 1;
t = __tm_to_time(tm);
return __time_to_tm(t, tm);
} else tm->tm_isdst = 0;
return tm;
}
struct tm * gmtime(const time_t * t)
{
static struct tm tm;
__time_to_tm(*t, &tm);
tm.tm_isdst = 0;
return &tm;
}
time_t mktime(struct tm *tm)
{
int isdst = tm->tm_isdst;
time_t t, lt;
__tzset();
tm->tm_sec += __timezone;
if (isdst > 0) tm->tm_sec += __dst_offset;
t = __tm_to_time(tm);
lt = t - __timezone;
if (isdst > 0) lt -= __dst_offset;
__time_to_tm(lt, tm);
__dst_adjust(tm);
return t;
}
struct tm *gmtime_r(const time_t *t, struct tm *result)
{
__time_to_tm(*t, result);
result->tm_isdst = 0;
return result;
}