// System.Globalization.JulianCalendar.cs
//
// (C) Ulrich Kunitz 2002
//
//
// Copyright (C) 2004 Novell, Inc (http://www.novell.com)
//
// Permission is hereby granted, free of charge, to any person obtaining
// a copy of this software and associated documentation files (the
// "Software"), to deal in the Software without restriction, including
// without limitation the rights to use, copy, modify, merge, publish,
// distribute, sublicense, and/or sell copies of the Software, and to
// permit persons to whom the Software is furnished to do so, subject to
// the following conditions:
//
// The above copyright notice and this permission notice shall be
// included in all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
// EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
// NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
// LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
// OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
// WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
//
namespace System.Globalization{
using System;
using System.Runtime.InteropServices;
/// <summary>
/// This is the Julian calendar.
/// </summary>
/// <remarks>
/// <para>The Julian calendar supports only the Common Era from
/// January 1, 1 (Gregorian) to December 31, 9999 (Gregorian).
/// </para>
/// <para>The implementation uses the
/// <see cref="N:CalendricalCalculations"/> namespace.
/// </para>
/// </remarks>
[Serializable]
[ComVisible (true)]
[MonoLimitation ("Serialization format not compatible with .NET")]
public class JulianCalendar : Calendar {
/// <summary>
/// Default constructor.
/// </summary>
public JulianCalendar() {
M_AbbrEraNames = new string[] {"C.E."};
M_EraNames = new string[] {"Common Era"};
if (twoDigitYearMax == 99)
twoDigitYearMax = 2029;
}
/// <summary>
/// The era number for the Common Era (C.E.) or Anno Domini (A.D.)
/// respective.
/// </summary>
public static readonly int JulianEra = 1;
/// <value>Overridden. Gives the eras supported by the Julian
/// calendar as an array of integers.
/// </value>
public override int[] Eras {
get {
return new int[] { JulianEra };
}
}
public override int TwoDigitYearMax
{
get {
return twoDigitYearMax;
}
set {
CheckReadOnly ();
M_ArgumentInRange ("value", value, 100, M_MaxYear);
twoDigitYearMax = value;
}
}
/// <summary>
/// A protected method checking the era number.
/// </summary>
/// <param name="era">The era number.</param>
/// <exception name="T:System.ArgumentException">
/// The exception is thrown if the era is not equal
/// <see cref="M:JulianEra"/>.
/// </exception>
internal void M_CheckEra(ref int era) {
if (era == CurrentEra)
era = JulianEra;
if (era != JulianEra)
throw new ArgumentException("Era value was not valid.");
}
/// <summary>
/// A protected method checking calendar year and the era number.
/// </summary>
/// <param name="year">An integer representing the calendar year.
/// </param>
/// <param name="era">The era number.</param>
/// <exception cref="T:System.ArgumentException">
/// The exception is thrown if the era is not equal
/// <see cref="M:JulianEra"/>.
/// </exception>
/// <exception cref="T:System.ArgumentOutOfRangeException">
/// The exception is thrown if the calendar year is outside of
/// the allowed range.
/// </exception>
internal override void M_CheckYE(int year, ref int era) {
M_CheckEra(ref era);
M_ArgumentInRange("year", year, 1, 9999);
}
/// <summary>
/// A protected method checking the calendar year, month, and
/// era number.
/// </summary>
/// <param name="year">An integer representing the calendar year.
/// </param>
/// <param name="month">An integer giving the calendar month.
/// </param>
/// <param name="era">The era number.</param>
/// <exception cref="T:System.ArgumentException">
/// The exception is thrown if the era is not equal
/// <see cref="M:JulianEra"/>.
/// </exception>
/// <exception cref="T:System.ArgumentOutOfRangeException">
/// The exception is thrown if the calendar year or month is
/// outside of the allowed range.
/// </exception>
internal void M_CheckYME(int year, int month, ref int era) {
M_CheckYE(year, ref era);
if (month < 1 || month > 12)
throw new ArgumentOutOfRangeException("month",
"Month must be between one and twelve.");
}
/// <summary>
/// A protected method checking the calendar day, month, and year
/// and the era number.
/// </summary>
/// <param name="year">An integer representing the calendar year.
/// </param>
/// <param name="month">An integer giving the calendar month.
/// </param>
/// <param name="day">An integer giving the calendar day.
/// </param>
/// <param name="era">The era number.</param>
/// <exception cref="T:System.ArgumentException">
/// The exception is thrown if the era is not equal
/// <see cref="M:JulianEra"/>.
/// </exception>
/// <exception cref="T:System.ArgumentOutOfRangeException">
/// The exception is thrown if the calendar year, month, or day is
/// outside of the allowed range.
/// </exception>
internal void M_CheckYMDE(int year, int month, int day, ref int era)
{
M_CheckYME(year, month, ref era);
M_ArgumentInRange("day", day, 1,
GetDaysInMonth(year, month, era));
if (year == 9999 && ((month == 10 && day > 19) || month > 10))
throw new ArgumentOutOfRangeException(
"The maximum Julian date is 19. 10. 9999.");
}
/// <summary>
/// Overridden. Adds months to a given date.
/// </summary>
/// <param name="time">The
/// <see cref="T:System.DateTime"/> to which to add
/// months.
/// </param>
/// <param name="months">The number of months to add.</param>
/// <returns>A new <see cref="T:System.DateTime"/> value, that
/// results from adding <paramref name="months"/> to the specified
/// DateTime.</returns>
public override DateTime AddMonths(DateTime time, int months) {
int rd = CCFixed.FromDateTime(time);
int day, month, year;
CCJulianCalendar.dmy_from_fixed(
out day, out month, out year, rd);
month += months;
year += CCMath.div_mod(out month, month, 12);
rd = CCJulianCalendar.fixed_from_dmy(day, month, year);
DateTime t = CCFixed.ToDateTime(rd);
return t.Add(time.TimeOfDay);
}
/// <summary>
/// Overridden. Adds years to a given date.
/// </summary>
/// <param name="time">The
/// <see cref="T:System.DateTime"/> to which to add
/// years.
/// </param>
/// <param name="years">The number of years to add.</param>
/// <returns>A new <see cref="T:System.DateTime"/> value, that
/// results from adding <paramref name="years"/> to the specified
/// DateTime.</returns>
public override DateTime AddYears(DateTime time, int years) {
int rd = CCFixed.FromDateTime(time);
int day, month, year;
CCJulianCalendar.dmy_from_fixed(
out day, out month, out year, rd);
year += years;
rd = CCJulianCalendar.fixed_from_dmy(day, month, year);
DateTime t = CCFixed.ToDateTime(rd);
return t.Add(time.TimeOfDay);
}
/// <summary>
/// Overridden. Gets the day of the month from
/// <paramref name="time"/>.
/// </summary>
/// <param name="time">The
/// <see cref="T:System.DateTime"/> that specifies a
/// date.
/// </param>
/// <returns>An integer giving the day of months, starting with 1.
/// </returns>
public override int GetDayOfMonth(DateTime time) {
int rd = CCFixed.FromDateTime(time);
return CCJulianCalendar.day_from_fixed(rd);
}
/// <summary>
/// Overridden. Gets the day of the week from the specified date.
/// </summary>
/// <param name="time">The
/// <see cref="T:System.DateTime"/> that specifies a
/// date.
/// </param>
/// <returns>An integer giving the day of months, starting with 1.
/// </returns>
public override DayOfWeek GetDayOfWeek(DateTime time) {
int rd = CCFixed.FromDateTime(time);
return (DayOfWeek)CCFixed.day_of_week(rd);
}
/// <summary>
/// Overridden. Gives the number of the day in the year.
/// </summary>
/// <param name="time">The
/// <see cref="T:System.DateTime"/> that specifies a
/// date.
/// </param>
/// <returns>An integer representing the day of the year,
/// starting with 1.</returns>
public override int GetDayOfYear(DateTime time) {
int rd = CCFixed.FromDateTime(time);
int year = CCJulianCalendar.year_from_fixed(rd);
int rd1_1 = CCJulianCalendar.fixed_from_dmy(1, 1, year);
return rd - rd1_1 + 1;
}
/// <summary>
/// Overridden. Gives the number of days in the specified month
/// of the given year and era.
/// </summary>
/// <param name="year">An integer that gives the year.
/// </param>
/// <param name="month">An integer that gives the month, starting
/// with 1.</param>
/// <param name="era">An intger that gives the era of the specified
/// year.</param>
/// <returns>An integer that gives the number of days of the
/// specified month.</returns>
/// <exception cref="T:System.ArgumentOutOfRangeException">
/// The exception is thrown, if <paramref name="month"/>,
/// <paramref name="year"/> ,or <paramref name="era"/> is outside
/// the allowed range.
/// </exception>
public override int GetDaysInMonth(int year, int month, int era) {
M_CheckYME(year, month, ref era);
int rd1 = CCJulianCalendar.fixed_from_dmy(1, month, year);
int rd2 = CCJulianCalendar.fixed_from_dmy(1, month+1, year);
return rd2 - rd1;
}
/// <summary>
/// Overridden. Gives the number of days of the specified
/// year of the given era.
/// </summary>
/// <param name="year">An integer that specifies the year.
/// </param>
/// <param name="era">An ineger that specifies the era.
/// </param>
/// <returns>An integer that gives the number of days of the
/// specified year.</returns>
/// <exception cref="T:System.ArgumentOutOfRangeExceiption">
/// The exception is thrown, if
/// <paramref name="year"/> is outside the allowed range.
/// </exception>
public override int GetDaysInYear(int year, int era) {
M_CheckYE(year, ref era);
int rd1 = CCJulianCalendar.fixed_from_dmy(1, 1, year);
int rd2 = CCJulianCalendar.fixed_from_dmy(1, 1, year+1);
return rd2 - rd1;
}
/// <summary>
/// Overridden. Gives the era of the specified date.
/// </summary>
/// <param name="time">The
/// <see cref="T:System.DateTime"/> that specifies a
/// date.
/// </param>
/// <returns>An integer representing the era of the calendar.
/// </returns>
public override int GetEra(DateTime time) {
// should change, if more than one era is supported
return JulianEra;
}
[ComVisible (false)]
public override int GetLeapMonth (int year, int era)
{
return 0;
}
/// <summary>
/// Overridden. Gives the number of the month of the specified
/// date.
/// </summary>
/// <param name="time">The
/// <see cref="T:System.DateTime"/> that specifies a
/// date.
/// </param>
/// <returns>An integer representing the month,
/// starting with 1.</returns>
public override int GetMonth(DateTime time) {
int rd = CCFixed.FromDateTime(time);
return CCJulianCalendar.month_from_fixed(rd);
}
/// <summary>
/// Overridden. Gives the number of months in the specified year
/// and era.
/// </summary>
/// <param name="year">An integer that specifies the year.
/// </param>
/// <param name="era">An integer that specifies the era.
/// </param>
/// <returns>An integer that gives the number of the months in the
/// specified year.</returns>
/// <exception cref="T:System.ArgumentOutOfRangeException">
/// The exception is thrown, if the year or the era are not valid.
/// </exception>
public override int GetMonthsInYear(int year, int era) {
M_CheckYE(year, ref era);
return 12;
}
/// <summary>
/// Overridden. Gives the number of the year of the specified
/// date.
/// </summary>
/// <param name="time">The
/// <see cref="T:System.DateTime"/> that specifies a
/// date.
/// </param>
/// <returns>An integer representing the year,
/// starting with 1.</returns>
public override int GetYear(DateTime time) {
int rd = CCFixed.FromDateTime(time);
return CCJulianCalendar.year_from_fixed(rd);
}
/// <summary>
/// Overridden. Tells whether the given day
/// is a leap day.
/// </summary>
/// <param name="year">An integer that specifies the year in the
/// given era.
/// </param>
/// <param name="month">An integer that specifies the month.
/// </param>
/// <param name="day">An integer that specifies the day.
/// </param>
/// <param name="era">An integer that specifies the era.
/// </param>
/// <returns>A boolean that tells whether the given day is a leap
/// day.
/// </returns>
/// <exception cref="T:System.ArgumentOutOfRangeException">
/// The exception is thrown, if the year, month, day, or era is not
/// valid.
/// </exception>
public override bool IsLeapDay(int year, int month, int day, int era)
{
M_CheckYMDE(year, month, day, ref era);
return IsLeapYear(year) && month == 2 && day == 29;
}
/// <summary>
/// Overridden. Tells whether the given month
/// is a leap month.
/// </summary>
/// <param name="year">An integer that specifies the year in the
/// given era.
/// </param>
/// <param name="month">An integer that specifies the month.
/// </param>
/// <param name="era">An integer that specifies the era.
/// </param>
/// <returns>A boolean that tells whether the given month is a leap
/// month.
/// </returns>
/// <exception cref="T:System.ArgumentOutOfRangeException">
/// The exception is thrown, if the year, month, or era is not
/// valid.
/// </exception>
public override bool IsLeapMonth(int year, int month, int era) {
M_CheckYME(year, month, ref era);
return false;
}
/// <summary>
/// Overridden. Tells whether the given year
/// is a leap year.
/// </summary>
/// <param name="year">An integer that specifies the year in the
/// given era.
/// </param>
/// <param name="era">An integer that specifies the era.
/// </param>
/// <returns>A boolean that tells whether the given year is a leap
/// year.
/// </returns>
/// <exception cref="T:System.ArgumentOutOfRangeException">
/// The exception is thrown, if the year or era is not
/// valid.
/// </exception>
public override bool IsLeapYear(int year, int era) {
M_CheckYE(year, ref era);
return CCJulianCalendar.is_leap_year(year);
}
/// <summary>
/// Overridden. Creates the
/// <see cref="T:System.DateTime"/> from the parameters.
/// </summary>
/// <param name="year">An integer that gives the year in the
/// <paramref name="era"/>.
/// </param>
/// <param name="month">An integer that specifies the month.
/// </param>
/// <param name="day">An integer that specifies the day.
/// </param>
/// <param name="hour">An integer that specifies the hour.
/// </param>
/// <param name="minute">An integer that specifies the minute.
/// </param>
/// <param name="second">An integer that gives the second.
/// </param>
/// <param name="milliseconds">An integer that gives the
/// milliseconds.
/// </param>
/// <param name="era">An integer that specifies the era.
/// </param>
/// <returns>
/// <see cref="T:system.DateTime"/> representig the date and time.
/// </returns>
/// <exception cref="T:System.ArgumentOutOfRangeException">
/// The exception is thrown, if at least one of the parameters
/// is out of range.
/// </exception>
public override DateTime ToDateTime(int year, int month, int day,
int hour, int minute, int second, int millisecond,
int era)
{
M_CheckYMDE(year, month, day, ref era);
M_CheckHMSM(hour, minute, second, millisecond);
int rd = CCJulianCalendar.fixed_from_dmy(day, month, year);
return CCFixed.ToDateTime(rd,
hour, minute, second, millisecond);
}
public override int ToFourDigitYear(int year)
{
return base.ToFourDigitYear (year);
}
[ComVisible (false)]
public override CalendarAlgorithmType AlgorithmType {
get {
return CalendarAlgorithmType.SolarCalendar;
}
}
static DateTime JulianMin = new DateTime (1, 1, 1, 0, 0, 0);
static DateTime JulianMax = new DateTime (9999, 12, 31, 11, 59, 59);
[ComVisible (false)]
public override DateTime MinSupportedDateTime {
get {
return JulianMin;
}
}
[ComVisible (false)]
public override DateTime MaxSupportedDateTime {
get {
return JulianMax;
}
}
} // class JulianCalendar
} // namespace System.Globalization
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