time_t mktime( tm_t* tm ) {
if ( tm->tm_year > 2100 ) {
return -1;
}
return daysdiff( tm->tm_year, tm->tm_mon, tm->tm_mday ) * SECONDS_PER_DAY +
tm->tm_hour * SECONDS_PER_HOUR + tm->tm_min * SECONDS_PER_MINUTE + tm->tm_sec;
}
time_t mktime( tm_t* _time ) {
if ( _time->tm_year > 2100 ) {
return -1;
}
return daysdiff(
_time->tm_year,
_time->tm_mon,
_time->tm_mday
) * SECONDS_PER_DAY + _time->tm_hour * SECONDS_PER_HOUR + _time->tm_min * SECONDS_PER_MINUTE + _time->tm_sec;
}
int dayofweek( int year, int month, int day ) {
/* The UNIX Epoch(1 Jan 1970) was a Thursday */
return ( 4 + daysdiff( year, month, day ) ) % 7;
}
