TaiwanCalendar.cs source code in C# .NET

                        Code:
                         / DotNET / DotNET / 8.0 / untmp / whidbey / REDBITS / ndp / clr / src / BCL / System / Globalization / TaiwanCalendar.cs / 1 / TaiwanCalendar.cs
                        
                        
                            // ==++== 
//
//   Copyright (c) Microsoft Corporation.  All rights reserved.
//
// ==--== 
namespace System.Globalization {
 
    using System; 
/* SSS_WARNINGS_OFF */
    /*=================================TaiwanCalendar========================== 
    **
    ** Taiwan calendar is based on the Gregorian calendar.  And the year is an offset to Gregorian calendar.
    ** That is,
    **      Taiwan year = Gregorian year - 1911.  So 1912/01/01 A.D. is Taiwan 1/01/01 
    **
    **  Calendar support range: 
    **      Calendar    Minimum     Maximum 
    **      ==========  ==========  ==========
    **      Gregorian   1912/01/01  9999/12/31 
    **      Taiwan      01/01/01    8088/12/31
    ============================================================================*/
/* SSS_WARNINGS_ON */
 
[System.Runtime.InteropServices.ComVisible(true)]
    [Serializable] public class TaiwanCalendar: Calendar { 
        // 
        // The era value for the current era.
        // 

        // Since
        //    Gregorian Year = Era Year + yearOffset
        // When Gregorian Year 1912 is year 1, so that 
        //    1912 = 1 + yearOffset
        //  So yearOffset = 1911 
        //m_EraInfo[0] = new EraInfo(1, new DateTime(1912, 1, 1).Ticks, 1911, 1, GregorianCalendar.MaxYear - 1911); 
        internal static EraInfo[] m_EraInfo = GregorianCalendarHelper.InitEraInfo(Calendar.CAL_TAIWAN);
 
        internal static Calendar m_defaultInstance;

        internal GregorianCalendarHelper helper;
 
        /*=================================GetDefaultInstance==========================
        **Action: Internal method to provide a default intance of TaiwanCalendar.  Used by NLS+ implementation 
        **       and other calendars. 
        **Returns:
        **Arguments: 
        **Exceptions:
        ============================================================================*/

        internal static Calendar GetDefaultInstance() { 
            if (m_defaultInstance == null) {
                m_defaultInstance = new TaiwanCalendar(); 
            } 
            return (m_defaultInstance);
        } 

        internal static readonly DateTime calendarMinValue = new DateTime(1912, 1, 1);

 
        [System.Runtime.InteropServices.ComVisible(false)]
        public override DateTime MinSupportedDateTime 
        { 
            get
            { 
                return (calendarMinValue);
            }
        }
 
        [System.Runtime.InteropServices.ComVisible(false)]
        public override DateTime MaxSupportedDateTime 
        { 
            get
            { 
                return (DateTime.MaxValue);
            }
        }
/* SSS_WARNINGS_OFF */ 
        // Return the type of the Taiwan calendar.
        // 
/* SSS_WARNINGS_ON */ 
        [System.Runtime.InteropServices.ComVisible(false)]
        public override CalendarAlgorithmType AlgorithmType 
        {
            get
            {
                return CalendarAlgorithmType.SolarCalendar; 
            }
        } 
 

        public TaiwanCalendar() { 
            helper = new GregorianCalendarHelper(this, m_EraInfo);
        }

        internal override int ID { 
            get {
                return (CAL_TAIWAN); 
            } 
        }
 

        public override DateTime AddMonths(DateTime time, int months) {
            return (helper.AddMonths(time, months));
        } 

 
        public override DateTime AddYears(DateTime time, int years) { 
            return (helper.AddYears(time, years));
        } 


        public override int GetDaysInMonth(int year, int month, int era) {
            return (helper.GetDaysInMonth(year, month, era)); 
        }
 
 
        public override int GetDaysInYear(int year, int era) {
            return (helper.GetDaysInYear(year, era)); 
        }


        public override int GetDayOfMonth(DateTime time) { 
            return (helper.GetDayOfMonth(time));
        } 
 

        public override DayOfWeek GetDayOfWeek(DateTime time)  { 
            return (helper.GetDayOfWeek(time));
        }

 
        public override int GetDayOfYear(DateTime time)
        { 
            return (helper.GetDayOfYear(time)); 
        }
 

        public override int GetMonthsInYear(int year, int era) {
            return (helper.GetMonthsInYear(year, era));
        } 

 
        [System.Runtime.InteropServices.ComVisible(false)] 
        public override int GetWeekOfYear(DateTime time, CalendarWeekRule rule, DayOfWeek firstDayOfWeek)
        { 
            return (helper.GetWeekOfYear(time, rule, firstDayOfWeek));
        }

 
        public override int GetEra(DateTime time) {
            return (helper.GetEra(time)); 
        } 

        public override int GetMonth(DateTime time) { 
            return (helper.GetMonth(time));
        }

 
        public override int GetYear(DateTime time) {
            return (helper.GetYear(time)); 
        } 

 
        public override bool IsLeapDay(int year, int month, int day, int era)
        {
            return (helper.IsLeapDay(year, month, day, era));
        } 

 
        public override bool IsLeapYear(int year, int era) { 
            return (helper.IsLeapYear(year, era));
        } 

        // Returns  the leap month in a calendar year of the specified era. This method returns 0
        // if this calendar does not have leap month, or this year is not a leap year.
        // 

        [System.Runtime.InteropServices.ComVisible(false)] 
        public override int GetLeapMonth(int year, int era) 
        {
            return (helper.GetLeapMonth(year, era)); 
        }


        public override bool IsLeapMonth(int year, int month, int era) { 
            return (helper.IsLeapMonth(year, month, era));
        } 
 

        public override DateTime ToDateTime(int year, int month, int day, int hour, int minute, int second, int millisecond, int era) { 
            return (helper.ToDateTime(year, month, day, hour, minute, second, millisecond, era));
        }

 
        public override int[] Eras {
            get { 
                return (helper.Eras); 
            }
        } 

        private const int DEFAULT_TWO_DIGIT_YEAR_MAX = 99;

        public override int TwoDigitYearMax { 
            get {
                if (twoDigitYearMax == -1) { 
                    twoDigitYearMax = GetSystemTwoDigitYearSetting(ID, DEFAULT_TWO_DIGIT_YEAR_MAX); 
                }
                return (twoDigitYearMax); 
            }

            set {
                VerifyWritable(); 
                if (value < 99 || value > helper.MaxYear) {
                    throw new ArgumentOutOfRangeException( 
                                "year", 
                                String.Format(
                                    CultureInfo.CurrentCulture, 
                                    Environment.GetResourceString("ArgumentOutOfRange_Range"),
                                    99,
                                    helper.MaxYear));
 
                }
                twoDigitYearMax = value; 
            } 
        }
/* SSS_WARNINGS_OFF */ 
        // For Taiwan calendar, four digit year is not used.
        // Therefore, for any two digit number, we just return the original number.
/* SSS_WARNINGS_ON */
        public override int ToFourDigitYear(int year) { 
            if (year <= 0) {
                throw new ArgumentOutOfRangeException("year", 
                    Environment.GetResourceString("ArgumentOutOfRange_NeedPosNum")); 
            }
 
            if (year > helper.MaxYear) {
                throw new ArgumentOutOfRangeException(
                            "year",
                            String.Format( 
                                CultureInfo.CurrentCulture,
                                Environment.GetResourceString("ArgumentOutOfRange_Range"), 
                                1, 
                                helper.MaxYear));
            } 
            return (year);
        }
    }
}
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TaiwanCalendar.cs source code in C# .NET

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