Function calcDate

src/OpenLoco/src/Date.cpp:100–133

0x00495C65 eax: totalDays returns: eax: year ebx: month edx: day

    //    ebx: month
    //    edx: day
    Date calcDate(const uint32_t totalDays)
    {
        constexpr auto kBaseYear = 1800;
        constexpr auto kDaysInYear = 365;
        constexpr auto kDaysInOlympiad = (365 * 4) + 1; // Useful because the calendar that Loco uses (Julian) has a 4-year cycle.
        constexpr auto kFeb29 = 31 + 28;

        int32_t years = ((totalDays / kDaysInOlympiad) & 0xFFFF) * 4;
        int32_t day = totalDays % kDaysInOlympiad;

        // Count the years and add an extra day for when there isn't leap year
        if (day > kDaysInYear)
        {
            day -= kDaysInYear;
            day -= 1;
            do
            {
                years++;
                day -= kDaysInYear;
            } while (day >= 0);
            day += kDaysInYear;
            if (day >= kFeb29)
            {
                day++;
            }
        }

        const auto year = kBaseYear + years;
        const auto monthDay = getMonthDay(day);

        auto result = Date(year, monthDay.first, monthDay.second);
        result.dayOfYear = day;
        return result;
    }

    uint32_t calcDays(Date date)
    {