// Licensed to the .NET Foundation under one or more agreements.
// The .NET Foundation licenses this file to you under the MIT license.
// See the LICENSE file in the project root for more information.
namespace System.Globalization
{
///
/// Korean calendar is based on the Gregorian calendar. And the year is an offset to Gregorian calendar.
/// That is,
/// Korean year = Gregorian year + 2333. So 2000/01/01 A.D. is Korean 4333/01/01
///
/// 0001/1/1 A.D. is Korean year 2334.
///
///
/// Calendar support range:
/// Calendar Minimum Maximum
/// ========== ========== ==========
/// Gregorian 0001/01/01 9999/12/31
/// Korean 2334/01/01 12332/12/31
///
public class KoreanCalendar : Calendar
{
public const int KoreanEra = 1;
// Since
// Gregorian Year = Era Year + yearOffset
// Gregorian Year 1 is Korean year 2334, so that
// 1 = 2334 + yearOffset
// So yearOffset = -2333
// Gregorian year 2001 is Korean year 4334.
private static readonly EraInfo[] s_koreanEraInfo = new EraInfo[]
{
new EraInfo(1, 1, 1, 1, -2333, 2334, GregorianCalendar.MaxYear + 2333) // era #, start year/month/day, yearOffset, minEraYear
};
private readonly GregorianCalendarHelper _helper;
public override DateTime MinSupportedDateTime => DateTime.MinValue;
public override DateTime MaxSupportedDateTime => DateTime.MaxValue;
public override CalendarAlgorithmType AlgorithmType => CalendarAlgorithmType.SolarCalendar;
public KoreanCalendar()
{
try
{
new CultureInfo("ko-KR");
}
catch (ArgumentException e)
{
throw new TypeInitializationException(GetType().ToString(), e);
}
_helper = new GregorianCalendarHelper(this, s_koreanEraInfo);
}
internal override CalendarId ID => CalendarId.KOREA;
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);
}
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);
}
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 => _helper.Eras;
private const int DefaultTwoDigitYearMax = 4362;
public override int TwoDigitYearMax
{
get
{
if (_twoDigitYearMax == -1)
{
_twoDigitYearMax = GetSystemTwoDigitYearSetting(ID, DefaultTwoDigitYearMax);
}
return _twoDigitYearMax;
}
set
{
VerifyWritable();
if (value < 99 || value > _helper.MaxYear)
{
throw new ArgumentOutOfRangeException(
nameof(value),
value,
SR.Format(SR.ArgumentOutOfRange_Range, 99, _helper.MaxYear));
}
_twoDigitYearMax = value;
}
}
public override int ToFourDigitYear(int year)
{
if (year < 0)
{
throw new ArgumentOutOfRangeException(nameof(year), year, SR.ArgumentOutOfRange_NeedNonNegNum);
}
return _helper.ToFourDigitYear(year, TwoDigitYearMax);
}
}
}