コード例 #1
0
ファイル: ISO8601Calculator.cs プロジェクト: nharren/ISO-8601
        public static CalendarDateTime Subtract(CalendarDateTime x, CalendarDateTimeDuration y)
        {
            long year = x.Year - y.Years;
            double month = x.Month - y.Months;
            double day = x.Day - y.Days;
            double hour = x.Hour - y.Hours;
            double minute = x.Minute;
            double second = x.Second;
            TimePrecision precision = x.Precision;

            if (y.Minutes != null)
            {
                minute -= y.Minutes.Value;

                if (minute != (int)minute && precision > TimePrecision.Minute)
                {
                    second += (minute - (int)minute) * SecondsPerMinute;
                    minute = (int)minute;
                }

                if (precision < TimePrecision.Minute)
                {
                    precision = TimePrecision.Minute;
                }
            }

            if (y.Seconds != null)
            {
                second -= y.Seconds.Value;

                if (precision < TimePrecision.Second)
                {
                    precision = TimePrecision.Second;
                }
            }

            while (second <= -SecondsPerMinute)
            {
                second += SecondsPerMinute;
                minute--;
            }

            while (minute <= -MinutesPerHour)
            {
                minute += MinutesPerHour;
                hour--;
            }

            while (hour <= -HoursPerDay)
            {
                hour += HoursPerDay;
                day--;
            }

            while (month < 1)
            {
                month += MonthsPerYear;
                year--;
            }

            while (day < 1)
            {
                day += DaysInMonth(year, (int)month);
                month--;
            }

            switch (precision)
            {
                case TimePrecision.Hour:
                    return new CalendarDateTime(new CalendarDate(year, (int)month, (int)day), new Time(hour));

                case TimePrecision.Minute:
                    return new CalendarDateTime(new CalendarDate(year, (int)month, (int)day), new Time((int)hour, minute));

                case TimePrecision.Second:
                    return new CalendarDateTime(new CalendarDate(year, (int)month, (int)day), new Time((int)hour, (int)minute, second));

                default:
                    return null;
            }
        }
コード例 #2
0
ファイル: ISO8601Calculator.cs プロジェクト: nharren/ISO-8601
        public static CalendarDateTime Add(CalendarDateTime x, CalendarDateTimeDuration y)
        {
            double day = x.Day + y.Days;
            double month = x.Month + y.Months;
            double year = x.Year + y.Years;
            var second = x.Second;
            var minute = x.Minute;
            var hour = x.Hour + y.Hours;
            var precision = x.Precision;

            if (y.Minutes != null)
            {
                minute += y.Minutes.Value;

                if (hour != (int)hour)
                {
                    minute += (hour - (int)hour) * MinutesPerHour;
                }

                if (precision < TimePrecision.Minute)
                {
                    precision = TimePrecision.Minute;
                }
            }

            if (y.Seconds != null)
            {
                second += y.Seconds.Value;

                if (minute != (int)minute)
                {
                    second += (minute - (int)minute) * SecondsPerMinute;
                }

                if (precision < TimePrecision.Second)
                {
                    precision = TimePrecision.Second;
                }
            }

            while (!(second < SecondsPerMinute))
            {
                second -= SecondsPerMinute;
                minute++;
            }

            while ((int)minute >= MinutesPerHour)
            {
                minute -= MinutesPerHour;
                hour++;
            }

            while ((int)hour >= HoursPerDay)
            {
                hour -= HoursPerDay;
                day++;
            }

            while ((int)month > MonthsPerYear)
            {
                month -= MonthsPerYear;
                year++;
            }

            int daysInMonth = DaysInMonth((long)year, (int)month);

            while (day > daysInMonth)
            {
                day -= daysInMonth;
                month++;

                daysInMonth = DaysInMonth((long)year, (int)month);
            }

            switch (precision)
            {
                case TimePrecision.Hour:
                    return new CalendarDateTime(new CalendarDate((long)year, (int)month, (int)day), new Time(hour));

                case TimePrecision.Minute:
                    return new CalendarDateTime(new CalendarDate((long)year, (int)month, (int)day), new Time((int)hour, minute));

                case TimePrecision.Second:
                    return new CalendarDateTime(new CalendarDate((long)year, (int)month, (int)day), new Time((int)hour, (int)minute, second));

                default:
                    return null;
            }
        }