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Diffstat (limited to 'src/mscorlib/corefx/System/Globalization/GregorianCalendarHelper.cs')
-rw-r--r-- | src/mscorlib/corefx/System/Globalization/GregorianCalendarHelper.cs | 668 |
1 files changed, 0 insertions, 668 deletions
diff --git a/src/mscorlib/corefx/System/Globalization/GregorianCalendarHelper.cs b/src/mscorlib/corefx/System/Globalization/GregorianCalendarHelper.cs deleted file mode 100644 index ee8ba13894..0000000000 --- a/src/mscorlib/corefx/System/Globalization/GregorianCalendarHelper.cs +++ /dev/null @@ -1,668 +0,0 @@ -// 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.Diagnostics.Contracts; -using System.Runtime.Serialization; -using System.Threading; - -namespace System.Globalization -{ - // Gregorian Calendars use Era Info - [Serializable] - internal class EraInfo - { - internal int era; // The value of the era. - internal long ticks; // The time in ticks when the era starts - internal int yearOffset; // The offset to Gregorian year when the era starts. - // Gregorian Year = Era Year + yearOffset - // Era Year = Gregorian Year - yearOffset - internal int minEraYear; // Min year value in this era. Generally, this value is 1, but this may - // be affected by the DateTime.MinValue; - internal int maxEraYear; // Max year value in this era. (== the year length of the era + 1) - - [OptionalField(VersionAdded = 4)] - internal String eraName; // The era name - [OptionalField(VersionAdded = 4)] - internal String abbrevEraName; // Abbreviated Era Name - [OptionalField(VersionAdded = 4)] - internal String englishEraName; // English era name - - internal EraInfo(int era, int startYear, int startMonth, int startDay, int yearOffset, int minEraYear, int maxEraYear) - { - this.era = era; - this.yearOffset = yearOffset; - this.minEraYear = minEraYear; - this.maxEraYear = maxEraYear; - this.ticks = new DateTime(startYear, startMonth, startDay).Ticks; - } - - internal EraInfo(int era, int startYear, int startMonth, int startDay, int yearOffset, int minEraYear, int maxEraYear, - String eraName, String abbrevEraName, String englishEraName) - { - this.era = era; - this.yearOffset = yearOffset; - this.minEraYear = minEraYear; - this.maxEraYear = maxEraYear; - this.ticks = new DateTime(startYear, startMonth, startDay).Ticks; - this.eraName = eraName; - this.abbrevEraName = abbrevEraName; - this.englishEraName = englishEraName; - } - } - - // This calendar recognizes two era values: - // 0 CurrentEra (AD) - // 1 BeforeCurrentEra (BC) - [Serializable] - internal class GregorianCalendarHelper - { - // 1 tick = 100ns = 10E-7 second - // Number of ticks per time unit - internal const long TicksPerMillisecond = 10000; - internal const long TicksPerSecond = TicksPerMillisecond * 1000; - internal const long TicksPerMinute = TicksPerSecond * 60; - internal const long TicksPerHour = TicksPerMinute * 60; - internal const long TicksPerDay = TicksPerHour * 24; - - // Number of milliseconds per time unit - internal const int MillisPerSecond = 1000; - internal const int MillisPerMinute = MillisPerSecond * 60; - internal const int MillisPerHour = MillisPerMinute * 60; - internal const int MillisPerDay = MillisPerHour * 24; - - // Number of days in a non-leap year - internal const int DaysPerYear = 365; - // Number of days in 4 years - internal const int DaysPer4Years = DaysPerYear * 4 + 1; - // Number of days in 100 years - internal const int DaysPer100Years = DaysPer4Years * 25 - 1; - // Number of days in 400 years - internal const int DaysPer400Years = DaysPer100Years * 4 + 1; - - // Number of days from 1/1/0001 to 1/1/10000 - internal const int DaysTo10000 = DaysPer400Years * 25 - 366; - - internal const long MaxMillis = (long)DaysTo10000 * MillisPerDay; - - 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 int MaxYear - { - get - { - return (m_maxYear); - } - } - - 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 - }; - - [OptionalField(VersionAdded = 1)] - internal int m_maxYear = 9999; - [OptionalField(VersionAdded = 1)] - internal int m_minYear; - internal Calendar m_Cal; - - [OptionalField(VersionAdded = 1)] - internal EraInfo[] m_EraInfo; - [OptionalField(VersionAdded = 1)] - internal int[] m_eras = null; - - - // Construct an instance of gregorian calendar. - internal GregorianCalendarHelper(Calendar cal, EraInfo[] eraInfo) - { - m_Cal = cal; - m_EraInfo = eraInfo; - m_maxYear = m_EraInfo[0].maxEraYear; - m_minYear = m_EraInfo[0].minEraYear; ; - } - - /*=================================GetGregorianYear========================== - **Action: Get the Gregorian year value for the specified year in an era. - **Returns: The Gregorian year value. - **Arguments: - ** year the year value in Japanese calendar - ** era the Japanese emperor era value. - **Exceptions: - ** ArgumentOutOfRangeException if year value is invalid or era value is invalid. - ============================================================================*/ - - internal int GetGregorianYear(int year, int era) - { - if (year < 0) - { - throw new ArgumentOutOfRangeException(nameof(year), - SR.ArgumentOutOfRange_NeedNonNegNum); - } - Contract.EndContractBlock(); - - if (era == Calendar.CurrentEra) - { - era = m_Cal.CurrentEraValue; - } - - for (int i = 0; i < m_EraInfo.Length; i++) - { - if (era == m_EraInfo[i].era) - { - if (year < m_EraInfo[i].minEraYear || year > m_EraInfo[i].maxEraYear) - { - throw new ArgumentOutOfRangeException( - nameof(year), - String.Format( - CultureInfo.CurrentCulture, - SR.ArgumentOutOfRange_Range, - m_EraInfo[i].minEraYear, - m_EraInfo[i].maxEraYear)); - } - return (m_EraInfo[i].yearOffset + year); - } - } - throw new ArgumentOutOfRangeException(nameof(era), SR.ArgumentOutOfRange_InvalidEraValue); - } - - internal bool IsValidYear(int year, int era) - { - if (year < 0) - { - return false; - } - - if (era == Calendar.CurrentEra) - { - era = m_Cal.CurrentEraValue; - } - - for (int i = 0; i < m_EraInfo.Length; i++) - { - if (era == m_EraInfo[i].era) - { - if (year < m_EraInfo[i].minEraYear || year > m_EraInfo[i].maxEraYear) - { - return false; - } - return true; - } - } - return false; - } - - - // 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) - { - CheckTicksRange(ticks); - // 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 <= 9999 && 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 static long DateToTicks(int year, int month, int day) - { - return (GetAbsoluteDate(year, month, day) * TicksPerDay); - } - - // Return the tick count corresponding to the given hour, minute, second. - // Will check the if the parameters are valid. - internal static long TimeToTicks(int hour, int minute, int second, int millisecond) - { - //TimeSpan.TimeToTicks is a family access function which does no error checking, so - //we need to put some error checking out here. - if (hour >= 0 && hour < 24 && minute >= 0 && minute < 60 && second >= 0 && second < 60) - { - if (millisecond < 0 || millisecond >= MillisPerSecond) - { - throw new ArgumentOutOfRangeException( - nameof(millisecond), - String.Format( - CultureInfo.CurrentCulture, - SR.ArgumentOutOfRange_Range, - 0, - MillisPerSecond - 1)); - } - return (InternalGloablizationHelper.TimeToTicks(hour, minute, second) + millisecond * TicksPerMillisecond); ; - } - throw new ArgumentOutOfRangeException(null, SR.ArgumentOutOfRange_BadHourMinuteSecond); - } - - - internal void CheckTicksRange(long ticks) - { - if (ticks < m_Cal.MinSupportedDateTime.Ticks || ticks > m_Cal.MaxSupportedDateTime.Ticks) - { - throw new ArgumentOutOfRangeException( - "time", - String.Format( - CultureInfo.InvariantCulture, - SR.ArgumentOutOfRange_CalendarRange, - m_Cal.MinSupportedDateTime, - m_Cal.MaxSupportedDateTime)); - } - Contract.EndContractBlock(); - } - - // 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 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(); - CheckTicksRange(time.Ticks); - - 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, m_Cal.MinSupportedDateTime, m_Cal.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 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 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 DayOfWeek GetDayOfWeek(DateTime time) - { - CheckTicksRange(time.Ticks); - return ((DayOfWeek)((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 int GetDayOfYear(DateTime time) - { - return (GetDatePart(time.Ticks, DatePartDayOfYear)); - } - - // Returns the number of days in the month given by the year and - // month arguments. - // - [Pure] - public int GetDaysInMonth(int year, int month, int era) - { - // - // Convert year/era value to Gregorain year value. - // - year = GetGregorianYear(year, era); - 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]); - } - - // Returns the number of days in the year given by the year argument for the current era. - // - - public int GetDaysInYear(int year, int era) - { - // - // Convert year/era value to Gregorain year value. - // - year = GetGregorianYear(year, era); - return ((year % 4 == 0 && (year % 100 != 0 || year % 400 == 0)) ? 366 : 365); - } - - // Returns the era for the specified DateTime value. - public int GetEra(DateTime time) - { - long ticks = time.Ticks; - // The assumption here is that m_EraInfo is listed in reverse order. - for (int i = 0; i < m_EraInfo.Length; i++) - { - if (ticks >= m_EraInfo[i].ticks) - { - return (m_EraInfo[i].era); - } - } - throw new ArgumentOutOfRangeException(nameof(time), SR.ArgumentOutOfRange_Era); - } - - - public int[] Eras - { - get - { - if (m_eras == null) - { - m_eras = new int[m_EraInfo.Length]; - for (int i = 0; i < m_EraInfo.Length; i++) - { - m_eras[i] = m_EraInfo[i].era; - } - } - return ((int[])m_eras.Clone()); - } - } - - // Returns the month part of the specified DateTime. The returned value is an - // integer between 1 and 12. - // - public int GetMonth(DateTime time) - { - return (GetDatePart(time.Ticks, DatePartMonth)); - } - - // Returns the number of months in the specified year and era. - public int GetMonthsInYear(int year, int era) - { - year = GetGregorianYear(year, era); - return (12); - } - - // Returns the year part of the specified DateTime. The returned value is an - // integer between 1 and 9999. - // - public int GetYear(DateTime time) - { - long ticks = time.Ticks; - int year = GetDatePart(ticks, DatePartYear); - for (int i = 0; i < m_EraInfo.Length; i++) - { - if (ticks >= m_EraInfo[i].ticks) - { - return (year - m_EraInfo[i].yearOffset); - } - } - throw new ArgumentException(SR.Argument_NoEra); - } - - // Returns the year that match the specified Gregorian year. The returned value is an - // integer between 1 and 9999. - // - public int GetYear(int year, DateTime time) - { - long ticks = time.Ticks; - for (int i = 0; i < m_EraInfo.Length; i++) - { - // while calculating dates with JapaneseLuniSolarCalendar, we can run into cases right after the start of the era - // and still belong to the month which is started in previous era. Calculating equivalent calendar date will cause - // using the new era info which will have the year offset equal to the year we are calculating year = m_EraInfo[i].yearOffset - // which will end up with zero as calendar year. - // We should use the previous era info instead to get the right year number. Example of such date is Feb 2nd 1989 - if (ticks >= m_EraInfo[i].ticks && year > m_EraInfo[i].yearOffset) - { - return (year - m_EraInfo[i].yearOffset); - } - } - throw new ArgumentException(SR.Argument_NoEra); - } - - // 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 bool IsLeapDay(int year, int month, int day, int era) - { - // year/month/era checking is done in GetDaysInMonth() - if (day < 1 || day > GetDaysInMonth(year, month, era)) - { - throw new ArgumentOutOfRangeException( - nameof(day), - String.Format( - CultureInfo.CurrentCulture, - SR.ArgumentOutOfRange_Range, - 1, - GetDaysInMonth(year, month, era))); - } - Contract.EndContractBlock(); - - if (!IsLeapYear(year, era)) - { - 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 int GetLeapMonth(int year, int era) - { - year = GetGregorianYear(year, era); - 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 bool IsLeapMonth(int year, int month, int era) - { - year = GetGregorianYear(year, era); - if (month < 1 || month > 12) - { - throw new ArgumentOutOfRangeException( - nameof(month), - String.Format( - CultureInfo.CurrentCulture, - SR.ArgumentOutOfRange_Range, - 1, - 12)); - } - 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 bool IsLeapYear(int year, int era) - { - year = GetGregorianYear(year, era); - return (year % 4 == 0 && (year % 100 != 0 || year % 400 == 0)); - } - - // Returns the date and time converted to a DateTime value. Throws an exception if the n-tuple is invalid. - // - public DateTime ToDateTime(int year, int month, int day, int hour, int minute, int second, int millisecond, int era) - { - year = GetGregorianYear(year, era); - long ticks = DateToTicks(year, month, day) + TimeToTicks(hour, minute, second, millisecond); - CheckTicksRange(ticks); - return (new DateTime(ticks)); - } - - public virtual int GetWeekOfYear(DateTime time, CalendarWeekRule rule, DayOfWeek firstDayOfWeek) - { - CheckTicksRange(time.Ticks); - // Use GregorianCalendar to get around the problem that the implmentation in Calendar.GetWeekOfYear() - // can call GetYear() that exceeds the supported range of the Gregorian-based calendars. - return (GregorianCalendar.GetDefaultInstance().GetWeekOfYear(time, rule, firstDayOfWeek)); - } - - - public int ToFourDigitYear(int year, int twoDigitYearMax) - { - if (year < 0) - { - throw new ArgumentOutOfRangeException(nameof(year), - SR.ArgumentOutOfRange_NeedPosNum); - } - Contract.EndContractBlock(); - - if (year < 100) - { - int y = year % 100; - return ((twoDigitYearMax / 100 - (y > twoDigitYearMax % 100 ? 1 : 0)) * 100 + y); - } - - if (year < m_minYear || year > m_maxYear) - { - throw new ArgumentOutOfRangeException( - nameof(year), - String.Format( - CultureInfo.CurrentCulture, - SR.ArgumentOutOfRange_Range, m_minYear, m_maxYear)); - } - // If the year value is above 100, just return the year value. Don't have to do - // the TwoDigitYearMax comparison. - return (year); - } - } -} - |