dt_bool_t dt_is_leap_year()

in src/dt.c [61:72]

• 11 lines of code
• 5 McCabe index (conditional complexity)

dt_bool_t dt_is_leap_year(int year)
{
    if (year <= 0) {
        return DT_FALSE;
    }
    if (year < 1582) {
        // Simple leap year calculation in Julian calendar
        return (abs(year) % 4 == 0);
    } else {
        return ((year % 4 == 0 && year % 100 != 0) || year % 400 == 0);
    }
}