C++ (Cpp) get_days_in_month Examples

Example #1

File: time_point.cpp Project: missio-cpp/missio

time_point convert_time_point(std::chrono::system_clock::time_point const& value)
{
    std::time_t const time = std::chrono::system_clock::to_time_t(value);

    std::int64_t day_number = time / 86400L;
    std::int64_t time_of_day = time % 86400L;

    time_point result;

    result.hours = time_of_day / 3600L;
    result.minutes = time_of_day % 3600L / 60L;
    result.seconds = time_of_day % 60L;

    auto const fractional_seconds = value - std::chrono::time_point_cast<std::chrono::seconds>(value);
    result.microseconds = std::chrono::duration_cast<std::chrono::microseconds>(fractional_seconds).count();

    for(result.year = 1970;
        day_number >= get_days_in_year(result.year);
        day_number -= get_days_in_year(result.year), ++result.year)
    {
    }

    for(result.month = 1;
        day_number >= get_days_in_month(result.year, result.month - 1);
        day_number -= get_days_in_month(result.year, result.month - 1), ++result.month)
    {
    }

    result.month_name = get_month_name(result.month - 1);

    result.day = day_number + 1;

    return result;
}

Example #2

File: mc146818rtc.c Project: ddk50/ibkvm

/* update 'tm' to the next second */
static void rtc_next_second(struct tm *tm)
{
    int days_in_month;

    tm->tm_sec++;
    if ((unsigned)tm->tm_sec >= 60) {
        tm->tm_sec = 0;
        tm->tm_min++;
        if ((unsigned)tm->tm_min >= 60) {
            tm->tm_min = 0;
            tm->tm_hour++;
            if ((unsigned)tm->tm_hour >= 24) {
                tm->tm_hour = 0;
                /* next day */
                tm->tm_wday++;
                if ((unsigned)tm->tm_wday >= 7)
                    tm->tm_wday = 0;
                days_in_month = get_days_in_month(tm->tm_mon,
                                                  tm->tm_year + 1900);
                tm->tm_mday++;
                if (tm->tm_mday < 1) {
                    tm->tm_mday = 1;
                } else if (tm->tm_mday > days_in_month) {
                    tm->tm_mday = 1;
                    tm->tm_mon++;
                    if (tm->tm_mon >= 12) {
                        tm->tm_mon = 0;
                        tm->tm_year++;
                    }
                }
            }
        }
    }
}