Function set_datetimestruct_days

numpy/core/src/multiarray/datetime.c:252–270

* Fills in the year, month, day in 'dts' based on the days * offset from 1970. */

 * offset from 1970.
 */
static void
set_datetimestruct_days(npy_int64 days, npy_datetimestruct *dts)
{
    int *month_lengths, i;

    dts->year = days_to_yearsdays(&days);
    month_lengths = _days_per_month_table[is_leapyear(dts->year)];

    for (i = 0; i < 12; ++i) {
        if (days < month_lengths[i]) {
            dts->month = i + 1;
            dts->day = (int)days + 1;
            return;
        }
        else {
            days -= month_lengths[i];
        }
    }
}

/*
 * Converts a datetime from a datetimestruct to a datetime based