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diff --git a/src/mscorlib/corefx/System/Globalization/GregorianCalendar.cs b/src/mscorlib/corefx/System/Globalization/GregorianCalendar.cs
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--- a/src/mscorlib/corefx/System/Globalization/GregorianCalendar.cs
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-// 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.
-
-//
-
-//
-
-using System;
-using System.Globalization;
-using System.Diagnostics.Contracts;
-using System.Runtime.Serialization;
-using System.Threading;
-
-namespace System.Globalization
-{
- // This calendar recognizes two era values:
- // 0 CurrentEra (AD)
- // 1 BeforeCurrentEra (BC)
-
- [Serializable]
-
- public class GregorianCalendar : Calendar
- {
- /*
- A.D. = anno Domini
- */
-
- public const int ADEra = 1;
-
-
- internal const int DatePartYear = 0;
- internal const int DatePartDayOfYear = 1;
- internal const int DatePartMonth = 2;
- internal const int DatePartDay = 3;
-
- //
- // This is the max Gregorian year can be represented by DateTime class. The limitation
- // is derived from DateTime class.
- //
- internal const int MaxYear = 9999;
-
- internal GregorianCalendarTypes m_type;
-
- internal static readonly int[] DaysToMonth365 =
- {
- 0, 31, 59, 90, 120, 151, 181, 212, 243, 273, 304, 334, 365
- };
-
- internal static readonly int[] DaysToMonth366 =
- {
- 0, 31, 60, 91, 121, 152, 182, 213, 244, 274, 305, 335, 366
- };
-
- private static volatile Calendar s_defaultInstance;
-
- [OnDeserialized]
- private void OnDeserialized(StreamingContext ctx)
- {
- if (m_type < GregorianCalendarTypes.Localized ||
- m_type > GregorianCalendarTypes.TransliteratedFrench)
- {
- throw new SerializationException(
- String.Format(CultureInfo.CurrentCulture, SR.Serialization_MemberOutOfRange, "type", "GregorianCalendar"));
- }
- }
-
- public override DateTime MinSupportedDateTime
- {
- get
- {
- return (DateTime.MinValue);
- }
- }
-
- public override DateTime MaxSupportedDateTime
- {
- get
- {
- return (DateTime.MaxValue);
- }
- }
-
- public override CalendarAlgorithmType AlgorithmType
- {
- get
- {
- return CalendarAlgorithmType.SolarCalendar;
- }
- }
-
- /*=================================GetDefaultInstance==========================
- **Action: Internal method to provide a default intance of GregorianCalendar. Used by NLS+ implementation
- ** and other calendars.
- **Returns:
- **Arguments:
- **Exceptions:
- ============================================================================*/
-
- internal static Calendar GetDefaultInstance()
- {
- if (s_defaultInstance == null)
- {
- s_defaultInstance = new GregorianCalendar();
- }
- return (s_defaultInstance);
- }
-
- // Construct an instance of gregorian calendar.
-
- public GregorianCalendar() :
- this(GregorianCalendarTypes.Localized)
- {
- }
-
-
- public GregorianCalendar(GregorianCalendarTypes type)
- {
- if ((int)type < (int)GregorianCalendarTypes.Localized || (int)type > (int)GregorianCalendarTypes.TransliteratedFrench)
- {
- throw new ArgumentOutOfRangeException(
- nameof(type),
- SR.Format(SR.ArgumentOutOfRange_Range,
- GregorianCalendarTypes.Localized, GregorianCalendarTypes.TransliteratedFrench));
- }
- Contract.EndContractBlock();
- this.m_type = type;
- }
-
- public virtual GregorianCalendarTypes CalendarType
- {
- get
- {
- return (m_type);
- }
-
- set
- {
- VerifyWritable();
-
- switch (value)
- {
- case GregorianCalendarTypes.Localized:
- case GregorianCalendarTypes.USEnglish:
- case GregorianCalendarTypes.MiddleEastFrench:
- case GregorianCalendarTypes.Arabic:
- case GregorianCalendarTypes.TransliteratedEnglish:
- case GregorianCalendarTypes.TransliteratedFrench:
- m_type = value;
- break;
-
- default:
- throw new ArgumentOutOfRangeException("m_type", SR.ArgumentOutOfRange_Enum);
- }
- }
- }
-
- internal override CalendarId ID
- {
- get
- {
- // By returning different ID for different variations of GregorianCalendar,
- // we can support the Transliterated Gregorian calendar.
- // DateTimeFormatInfo will use this ID to get formatting information about
- // the calendar.
- return ((CalendarId)m_type);
- }
- }
-
-
- // Returns a given date part of this DateTime. This method is used
- // to compute the year, day-of-year, month, or day part.
- internal virtual int GetDatePart(long ticks, int part)
- {
- // n = number of days since 1/1/0001
- int n = (int)(ticks / TicksPerDay);
- // y400 = number of whole 400-year periods since 1/1/0001
- int y400 = n / DaysPer400Years;
- // n = day number within 400-year period
- n -= y400 * DaysPer400Years;
- // y100 = number of whole 100-year periods within 400-year period
- int y100 = n / DaysPer100Years;
- // Last 100-year period has an extra day, so decrement result if 4
- if (y100 == 4) y100 = 3;
- // n = day number within 100-year period
- n -= y100 * DaysPer100Years;
- // y4 = number of whole 4-year periods within 100-year period
- int y4 = n / DaysPer4Years;
- // n = day number within 4-year period
- n -= y4 * DaysPer4Years;
- // y1 = number of whole years within 4-year period
- int y1 = n / DaysPerYear;
- // Last year has an extra day, so decrement result if 4
- if (y1 == 4) y1 = 3;
- // If year was requested, compute and return it
- if (part == DatePartYear)
- {
- return (y400 * 400 + y100 * 100 + y4 * 4 + y1 + 1);
- }
- // n = day number within year
- n -= y1 * DaysPerYear;
- // If day-of-year was requested, return it
- if (part == DatePartDayOfYear)
- {
- return (n + 1);
- }
- // Leap year calculation looks different from IsLeapYear since y1, y4,
- // and y100 are relative to year 1, not year 0
- bool leapYear = (y1 == 3 && (y4 != 24 || y100 == 3));
- int[] days = leapYear ? DaysToMonth366 : DaysToMonth365;
- // All months have less than 32 days, so n >> 5 is a good conservative
- // estimate for the month
- int m = (n >> 5) + 1;
- // m = 1-based month number
- while (n >= days[m]) m++;
- // If month was requested, return it
- if (part == DatePartMonth) return (m);
- // Return 1-based day-of-month
- return (n - days[m - 1] + 1);
- }
-
- /*=================================GetAbsoluteDate==========================
- **Action: Gets the absolute date for the given Gregorian date. The absolute date means
- ** the number of days from January 1st, 1 A.D.
- **Returns: the absolute date
- **Arguments:
- ** year the Gregorian year
- ** month the Gregorian month
- ** day the day
- **Exceptions:
- ** ArgumentOutOfRangException if year, month, day value is valid.
- **Note:
- ** This is an internal method used by DateToTicks() and the calculations of Hijri and Hebrew calendars.
- ** Number of Days in Prior Years (both common and leap years) +
- ** Number of Days in Prior Months of Current Year +
- ** Number of Days in Current Month
- **
- ============================================================================*/
-
- internal static long GetAbsoluteDate(int year, int month, int day)
- {
- if (year >= 1 && year <= MaxYear && month >= 1 && month <= 12)
- {
- int[] days = ((year % 4 == 0 && (year % 100 != 0 || year % 400 == 0))) ? DaysToMonth366 : DaysToMonth365;
- if (day >= 1 && (day <= days[month] - days[month - 1]))
- {
- int y = year - 1;
- int absoluteDate = y * 365 + y / 4 - y / 100 + y / 400 + days[month - 1] + day - 1;
- return (absoluteDate);
- }
- }
- throw new ArgumentOutOfRangeException(null, SR.ArgumentOutOfRange_BadYearMonthDay);
- }
-
- // Returns the tick count corresponding to the given year, month, and day.
- // Will check the if the parameters are valid.
- internal virtual long DateToTicks(int year, int month, int day)
- {
- return (GetAbsoluteDate(year, month, day) * TicksPerDay);
- }
-
- // Returns the DateTime resulting from adding the given number of
- // months to the specified DateTime. The result is computed by incrementing
- // (or decrementing) the year and month parts of the specified DateTime by
- // value months, and, if required, adjusting the day part of the
- // resulting date downwards to the last day of the resulting month in the
- // resulting year. The time-of-day part of the result is the same as the
- // time-of-day part of the specified DateTime.
- //
- // In more precise terms, considering the specified DateTime to be of the
- // form y / m / d + t, where y is the
- // year, m is the month, d is the day, and t is the
- // time-of-day, the result is y1 / m1 / d1 + t,
- // where y1 and m1 are computed by adding value months
- // to y and m, and d1 is the largest value less than
- // or equal to d that denotes a valid day in month m1 of year
- // y1.
- //
-
- public override DateTime AddMonths(DateTime time, int months)
- {
- if (months < -120000 || months > 120000)
- {
- throw new ArgumentOutOfRangeException(
- nameof(months),
- String.Format(
- CultureInfo.CurrentCulture,
- SR.ArgumentOutOfRange_Range,
- -120000,
- 120000));
- }
- Contract.EndContractBlock();
- int y = GetDatePart(time.Ticks, DatePartYear);
- int m = GetDatePart(time.Ticks, DatePartMonth);
- int d = GetDatePart(time.Ticks, DatePartDay);
- int i = m - 1 + months;
- if (i >= 0)
- {
- m = i % 12 + 1;
- y = y + i / 12;
- }
- else
- {
- m = 12 + (i + 1) % 12;
- y = y + (i - 11) / 12;
- }
- int[] daysArray = (y % 4 == 0 && (y % 100 != 0 || y % 400 == 0)) ? DaysToMonth366 : DaysToMonth365;
- int days = (daysArray[m] - daysArray[m - 1]);
-
- if (d > days)
- {
- d = days;
- }
- long ticks = DateToTicks(y, m, d) + time.Ticks % TicksPerDay;
- Calendar.CheckAddResult(ticks, MinSupportedDateTime, MaxSupportedDateTime);
-
- return (new DateTime(ticks));
- }
-
-
- // Returns the DateTime resulting from adding the given number of
- // years to the specified DateTime. The result is computed by incrementing
- // (or decrementing) the year part of the specified DateTime by value
- // years. If the month and day of the specified DateTime is 2/29, and if the
- // resulting year is not a leap year, the month and day of the resulting
- // DateTime becomes 2/28. Otherwise, the month, day, and time-of-day
- // parts of the result are the same as those of the specified DateTime.
- //
-
- public override DateTime AddYears(DateTime time, int years)
- {
- return (AddMonths(time, years * 12));
- }
-
- // Returns the day-of-month part of the specified DateTime. The returned
- // value is an integer between 1 and 31.
- //
-
- public override int GetDayOfMonth(DateTime time)
- {
- return (GetDatePart(time.Ticks, DatePartDay));
- }
-
- // Returns the day-of-week part of the specified DateTime. The returned value
- // is an integer between 0 and 6, where 0 indicates Sunday, 1 indicates
- // Monday, 2 indicates Tuesday, 3 indicates Wednesday, 4 indicates
- // Thursday, 5 indicates Friday, and 6 indicates Saturday.
- //
-
- public override DayOfWeek GetDayOfWeek(DateTime time)
- {
- return ((DayOfWeek)((int)(time.Ticks / TicksPerDay + 1) % 7));
- }
-
- // Returns the day-of-year part of the specified DateTime. The returned value
- // is an integer between 1 and 366.
- //
-
- public override int GetDayOfYear(DateTime time)
- {
- return (GetDatePart(time.Ticks, DatePartDayOfYear));
- }
-
- // Returns the number of days in the month given by the year and
- // month arguments.
- //
-
- public override int GetDaysInMonth(int year, int month, int era)
- {
- if (era == CurrentEra || era == ADEra)
- {
- if (year < 1 || year > MaxYear)
- {
- throw new ArgumentOutOfRangeException(nameof(year), SR.Format(SR.ArgumentOutOfRange_Range,
- 1, MaxYear));
- }
- if (month < 1 || month > 12)
- {
- throw new ArgumentOutOfRangeException(nameof(month), SR.ArgumentOutOfRange_Month);
- }
- int[] days = ((year % 4 == 0 && (year % 100 != 0 || year % 400 == 0)) ? DaysToMonth366 : DaysToMonth365);
- return (days[month] - days[month - 1]);
- }
- throw new ArgumentOutOfRangeException(nameof(era), SR.ArgumentOutOfRange_InvalidEraValue);
- }
-
- // Returns the number of days in the year given by the year argument for the current era.
- //
-
- public override int GetDaysInYear(int year, int era)
- {
- if (era == CurrentEra || era == ADEra)
- {
- if (year >= 1 && year <= MaxYear)
- {
- return ((year % 4 == 0 && (year % 100 != 0 || year % 400 == 0)) ? 366 : 365);
- }
- throw new ArgumentOutOfRangeException(
- nameof(year),
- String.Format(
- CultureInfo.CurrentCulture,
- SR.ArgumentOutOfRange_Range,
- 1,
- MaxYear));
- }
- throw new ArgumentOutOfRangeException(nameof(era), SR.ArgumentOutOfRange_InvalidEraValue);
- }
-
- // Returns the era for the specified DateTime value.
-
- public override int GetEra(DateTime time)
- {
- return (ADEra);
- }
-
-
- public override int[] Eras
- {
- get
- {
- return (new int[] { ADEra });
- }
- }
-
-
- // Returns the month part of the specified DateTime. The returned value is an
- // integer between 1 and 12.
- //
-
- public override int GetMonth(DateTime time)
- {
- return (GetDatePart(time.Ticks, DatePartMonth));
- }
-
- // Returns the number of months in the specified year and era.
-
- public override int GetMonthsInYear(int year, int era)
- {
- if (era == CurrentEra || era == ADEra)
- {
- if (year >= 1 && year <= MaxYear)
- {
- return (12);
- }
- throw new ArgumentOutOfRangeException(
- nameof(year),
- String.Format(
- CultureInfo.CurrentCulture,
- SR.ArgumentOutOfRange_Range,
- 1,
- MaxYear));
- }
- throw new ArgumentOutOfRangeException(nameof(era), SR.ArgumentOutOfRange_InvalidEraValue);
- }
-
- // Returns the year part of the specified DateTime. The returned value is an
- // integer between 1 and 9999.
- //
-
- public override int GetYear(DateTime time)
- {
- return (GetDatePart(time.Ticks, DatePartYear));
- }
-
- // Checks whether a given day in the specified era is a leap day. This method returns true if
- // the date is a leap day, or false if not.
- //
-
- public override bool IsLeapDay(int year, int month, int day, int era)
- {
- if (month < 1 || month > 12)
- {
- throw new ArgumentOutOfRangeException(nameof(month), SR.Format(SR.ArgumentOutOfRange_Range,
- 1, 12));
- }
- Contract.EndContractBlock();
-
- if (era != CurrentEra && era != ADEra)
- {
- throw new ArgumentOutOfRangeException(nameof(era), SR.ArgumentOutOfRange_InvalidEraValue);
- }
- if (year < 1 || year > MaxYear)
- {
- throw new ArgumentOutOfRangeException(
- nameof(year),
- SR.Format(SR.ArgumentOutOfRange_Range, 1, MaxYear));
- }
-
- if (day < 1 || day > GetDaysInMonth(year, month))
- {
- throw new ArgumentOutOfRangeException(nameof(day), SR.Format(SR.ArgumentOutOfRange_Range,
- 1, GetDaysInMonth(year, month)));
- }
- if (!IsLeapYear(year))
- {
- return (false);
- }
- if (month == 2 && day == 29)
- {
- return (true);
- }
- return (false);
- }
-
- // 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.
- //
-
- public override int GetLeapMonth(int year, int era)
- {
- if (era != CurrentEra && era != ADEra)
- {
- throw new ArgumentOutOfRangeException(nameof(era), SR.ArgumentOutOfRange_InvalidEraValue);
- }
- if (year < 1 || year > MaxYear)
- {
- throw new ArgumentOutOfRangeException(
- nameof(year),
- String.Format(
- CultureInfo.CurrentCulture,
- SR.ArgumentOutOfRange_Range, 1, MaxYear));
- }
- Contract.EndContractBlock();
- return (0);
- }
-
- // Checks whether a given month in the specified era is a leap month. This method returns true if
- // month is a leap month, or false if not.
- //
-
- public override bool IsLeapMonth(int year, int month, int era)
- {
- if (era != CurrentEra && era != ADEra)
- {
- throw new ArgumentOutOfRangeException(nameof(era), SR.ArgumentOutOfRange_InvalidEraValue);
- }
-
- if (year < 1 || year > MaxYear)
- {
- throw new ArgumentOutOfRangeException(
- nameof(year),
- String.Format(
- CultureInfo.CurrentCulture,
- SR.ArgumentOutOfRange_Range, 1, MaxYear));
- }
-
- if (month < 1 || month > 12)
- {
- throw new ArgumentOutOfRangeException(nameof(month), SR.Format(SR.ArgumentOutOfRange_Range,
- 1, 12));
- }
- Contract.EndContractBlock();
- return (false);
- }
-
- // Checks whether a given year in the specified era is a leap year. This method returns true if
- // year is a leap year, or false if not.
- //
-
- public override bool IsLeapYear(int year, int era)
- {
- if (era == CurrentEra || era == ADEra)
- {
- if (year >= 1 && year <= MaxYear)
- {
- return (year % 4 == 0 && (year % 100 != 0 || year % 400 == 0));
- }
-
- throw new ArgumentOutOfRangeException(
- nameof(year),
- String.Format(
- CultureInfo.CurrentCulture,
- SR.ArgumentOutOfRange_Range, 1, MaxYear));
- }
- throw new ArgumentOutOfRangeException(nameof(era), SR.ArgumentOutOfRange_InvalidEraValue);
- }
-
- // Returns the date and time converted to a DateTime value. Throws an exception if the n-tuple is invalid.
- //
-
- public override DateTime ToDateTime(int year, int month, int day, int hour, int minute, int second, int millisecond, int era)
- {
- if (era == CurrentEra || era == ADEra)
- {
- return new DateTime(year, month, day, hour, minute, second, millisecond);
- }
- throw new ArgumentOutOfRangeException(nameof(era), SR.ArgumentOutOfRange_InvalidEraValue);
- }
-
- internal override Boolean TryToDateTime(int year, int month, int day, int hour, int minute, int second, int millisecond, int era, out DateTime result)
- {
- if (era == CurrentEra || era == ADEra)
- {
- try
- {
- result = new DateTime(year, month, day, hour, minute, second, millisecond);
- return true;
- }
- catch (ArgumentOutOfRangeException)
- {
- result = DateTime.Now;
- return false;
- }
- catch (ArgumentException)
- {
- result = DateTime.Now;
- return false;
- }
- }
- result = DateTime.MinValue;
- return false;
- }
-
- private const int DEFAULT_TWO_DIGIT_YEAR_MAX = 2029;
-
-
- public override int TwoDigitYearMax
- {
- get
- {
- if (twoDigitYearMax == -1)
- {
- twoDigitYearMax = GetSystemTwoDigitYearSetting(ID, DEFAULT_TWO_DIGIT_YEAR_MAX);
- }
- return (twoDigitYearMax);
- }
-
- set
- {
- VerifyWritable();
- if (value < 99 || value > MaxYear)
- {
- throw new ArgumentOutOfRangeException(
- "year",
- String.Format(
- CultureInfo.CurrentCulture,
- SR.ArgumentOutOfRange_Range,
- 99,
- MaxYear));
- }
- twoDigitYearMax = value;
- }
- }
-
-
- public override int ToFourDigitYear(int year)
- {
- if (year < 0)
- {
- throw new ArgumentOutOfRangeException(nameof(year),
- SR.ArgumentOutOfRange_NeedNonNegNum);
- }
- Contract.EndContractBlock();
-
- if (year > MaxYear)
- {
- throw new ArgumentOutOfRangeException(
- nameof(year),
- String.Format(
- CultureInfo.CurrentCulture,
- SR.ArgumentOutOfRange_Range, 1, MaxYear));
- }
- return (base.ToFourDigitYear(year));
- }
- }
-}