| /* |
| * Copyright (C) 1997-2009, International Business Machines Corporation and others. |
| * All Rights Reserved. |
| ******************************************************************************** |
| * |
| * File GREGOCAL.H |
| * |
| * Modification History: |
| * |
| * Date Name Description |
| * 04/22/97 aliu Overhauled header. |
| * 07/28/98 stephen Sync with JDK 1.2 |
| * 09/04/98 stephen Re-sync with JDK 8/31 putback |
| * 09/14/98 stephen Changed type of kOneDay, kOneWeek to double. |
| * Fixed bug in roll() |
| * 10/15/99 aliu Fixed j31, incorrect WEEK_OF_YEAR computation. |
| * Added documentation of WEEK_OF_YEAR computation. |
| * 10/15/99 aliu Fixed j32, cannot set date to Feb 29 2000 AD. |
| * {JDK bug 4210209 4209272} |
| * 11/07/2003 srl Update, clean up documentation. |
| ******************************************************************************** |
| */ |
| |
| #ifndef GREGOCAL_H |
| #define GREGOCAL_H |
| |
| #include "unicode/utypes.h" |
| |
| #if !UCONFIG_NO_FORMATTING |
| |
| #include "unicode/calendar.h" |
| |
| /** |
| * \file |
| * \brief C++ API: Concrete class which provides the standard calendar. |
| */ |
| |
| U_NAMESPACE_BEGIN |
| |
| /** |
| * Concrete class which provides the standard calendar used by most of the world. |
| * <P> |
| * The standard (Gregorian) calendar has 2 eras, BC and AD. |
| * <P> |
| * This implementation handles a single discontinuity, which corresponds by default to |
| * the date the Gregorian calendar was originally instituted (October 15, 1582). Not all |
| * countries adopted the Gregorian calendar then, so this cutover date may be changed by |
| * the caller. |
| * <P> |
| * Prior to the institution of the Gregorian Calendar, New Year's Day was March 25. To |
| * avoid confusion, this Calendar always uses January 1. A manual adjustment may be made |
| * if desired for dates that are prior to the Gregorian changeover and which fall |
| * between January 1 and March 24. |
| * |
| * <p>Values calculated for the <code>WEEK_OF_YEAR</code> field range from 1 to |
| * 53. Week 1 for a year is the first week that contains at least |
| * <code>getMinimalDaysInFirstWeek()</code> days from that year. It thus |
| * depends on the values of <code>getMinimalDaysInFirstWeek()</code>, |
| * <code>getFirstDayOfWeek()</code>, and the day of the week of January 1. |
| * Weeks between week 1 of one year and week 1 of the following year are |
| * numbered sequentially from 2 to 52 or 53 (as needed). |
| * |
| * <p>For example, January 1, 1998 was a Thursday. If |
| * <code>getFirstDayOfWeek()</code> is <code>MONDAY</code> and |
| * <code>getMinimalDaysInFirstWeek()</code> is 4 (these are the values |
| * reflecting ISO 8601 and many national standards), then week 1 of 1998 starts |
| * on December 29, 1997, and ends on January 4, 1998. If, however, |
| * <code>getFirstDayOfWeek()</code> is <code>SUNDAY</code>, then week 1 of 1998 |
| * starts on January 4, 1998, and ends on January 10, 1998; the first three days |
| * of 1998 then are part of week 53 of 1997. |
| * |
| * <p>Example for using GregorianCalendar: |
| * <pre> |
| * \code |
| * // get the supported ids for GMT-08:00 (Pacific Standard Time) |
| * UErrorCode success = U_ZERO_ERROR; |
| * const StringEnumeration *ids = TimeZone::createEnumeration(-8 * 60 * 60 * 1000); |
| * // if no ids were returned, something is wrong. get out. |
| * if (ids == 0 || ids->count(success) == 0) { |
| * return; |
| * } |
| * |
| * // begin output |
| * cout << "Current Time" << endl; |
| * |
| * // create a Pacific Standard Time time zone |
| * SimpleTimeZone* pdt = new SimpleTimeZone(-8 * 60 * 60 * 1000, ids->unext(NULL, success))); |
| * |
| * // set up rules for daylight savings time |
| * pdt->setStartRule(UCAL_MARCH, 1, UCAL_SUNDAY, 2 * 60 * 60 * 1000); |
| * pdt->setEndRule(UCAL_NOVEMBER, 2, UCAL_SUNDAY, 2 * 60 * 60 * 1000); |
| * |
| * // create a GregorianCalendar with the Pacific Daylight time zone |
| * // and the current date and time |
| * Calendar* calendar = new GregorianCalendar( pdt, success ); |
| * |
| * // print out a bunch of interesting things |
| * cout << "ERA: " << calendar->get( UCAL_ERA, success ) << endl; |
| * cout << "YEAR: " << calendar->get( UCAL_YEAR, success ) << endl; |
| * cout << "MONTH: " << calendar->get( UCAL_MONTH, success ) << endl; |
| * cout << "WEEK_OF_YEAR: " << calendar->get( UCAL_WEEK_OF_YEAR, success ) << endl; |
| * cout << "WEEK_OF_MONTH: " << calendar->get( UCAL_WEEK_OF_MONTH, success ) << endl; |
| * cout << "DATE: " << calendar->get( UCAL_DATE, success ) << endl; |
| * cout << "DAY_OF_MONTH: " << calendar->get( UCAL_DAY_OF_MONTH, success ) << endl; |
| * cout << "DAY_OF_YEAR: " << calendar->get( UCAL_DAY_OF_YEAR, success ) << endl; |
| * cout << "DAY_OF_WEEK: " << calendar->get( UCAL_DAY_OF_WEEK, success ) << endl; |
| * cout << "DAY_OF_WEEK_IN_MONTH: " << calendar->get( UCAL_DAY_OF_WEEK_IN_MONTH, success ) << endl; |
| * cout << "AM_PM: " << calendar->get( UCAL_AM_PM, success ) << endl; |
| * cout << "HOUR: " << calendar->get( UCAL_HOUR, success ) << endl; |
| * cout << "HOUR_OF_DAY: " << calendar->get( UCAL_HOUR_OF_DAY, success ) << endl; |
| * cout << "MINUTE: " << calendar->get( UCAL_MINUTE, success ) << endl; |
| * cout << "SECOND: " << calendar->get( UCAL_SECOND, success ) << endl; |
| * cout << "MILLISECOND: " << calendar->get( UCAL_MILLISECOND, success ) << endl; |
| * cout << "ZONE_OFFSET: " << (calendar->get( UCAL_ZONE_OFFSET, success )/(60*60*1000)) << endl; |
| * cout << "DST_OFFSET: " << (calendar->get( UCAL_DST_OFFSET, success )/(60*60*1000)) << endl; |
| * |
| * cout << "Current Time, with hour reset to 3" << endl; |
| * calendar->clear(UCAL_HOUR_OF_DAY); // so doesn't override |
| * calendar->set(UCAL_HOUR, 3); |
| * cout << "ERA: " << calendar->get( UCAL_ERA, success ) << endl; |
| * cout << "YEAR: " << calendar->get( UCAL_YEAR, success ) << endl; |
| * cout << "MONTH: " << calendar->get( UCAL_MONTH, success ) << endl; |
| * cout << "WEEK_OF_YEAR: " << calendar->get( UCAL_WEEK_OF_YEAR, success ) << endl; |
| * cout << "WEEK_OF_MONTH: " << calendar->get( UCAL_WEEK_OF_MONTH, success ) << endl; |
| * cout << "DATE: " << calendar->get( UCAL_DATE, success ) << endl; |
| * cout << "DAY_OF_MONTH: " << calendar->get( UCAL_DAY_OF_MONTH, success ) << endl; |
| * cout << "DAY_OF_YEAR: " << calendar->get( UCAL_DAY_OF_YEAR, success ) << endl; |
| * cout << "DAY_OF_WEEK: " << calendar->get( UCAL_DAY_OF_WEEK, success ) << endl; |
| * cout << "DAY_OF_WEEK_IN_MONTH: " << calendar->get( UCAL_DAY_OF_WEEK_IN_MONTH, success ) << endl; |
| * cout << "AM_PM: " << calendar->get( UCAL_AM_PM, success ) << endl; |
| * cout << "HOUR: " << calendar->get( UCAL_HOUR, success ) << endl; |
| * cout << "HOUR_OF_DAY: " << calendar->get( UCAL_HOUR_OF_DAY, success ) << endl; |
| * cout << "MINUTE: " << calendar->get( UCAL_MINUTE, success ) << endl; |
| * cout << "SECOND: " << calendar->get( UCAL_SECOND, success ) << endl; |
| * cout << "MILLISECOND: " << calendar->get( UCAL_MILLISECOND, success ) << endl; |
| * cout << "ZONE_OFFSET: " << (calendar->get( UCAL_ZONE_OFFSET, success )/(60*60*1000)) << endl; // in hours |
| * cout << "DST_OFFSET: " << (calendar->get( UCAL_DST_OFFSET, success )/(60*60*1000)) << endl; // in hours |
| * |
| * if (U_FAILURE(success)) { |
| * cout << "An error occured. success=" << u_errorName(success) << endl; |
| * } |
| * |
| * delete ids; |
| * delete calendar; // also deletes pdt |
| * \endcode |
| * </pre> |
| * @stable ICU 2.0 |
| */ |
| class U_I18N_API GregorianCalendar: public Calendar { |
| public: |
| |
| /** |
| * Useful constants for GregorianCalendar and TimeZone. |
| * @stable ICU 2.0 |
| */ |
| enum EEras { |
| BC, |
| AD |
| }; |
| |
| /** |
| * Constructs a default GregorianCalendar using the current time in the default time |
| * zone with the default locale. |
| * |
| * @param success Indicates the status of GregorianCalendar object construction. |
| * Returns U_ZERO_ERROR if constructed successfully. |
| * @stable ICU 2.0 |
| */ |
| GregorianCalendar(UErrorCode& success); |
| |
| /** |
| * Constructs a GregorianCalendar based on the current time in the given time zone |
| * with the default locale. Clients are no longer responsible for deleting the given |
| * time zone object after it's adopted. |
| * |
| * @param zoneToAdopt The given timezone. |
| * @param success Indicates the status of GregorianCalendar object construction. |
| * Returns U_ZERO_ERROR if constructed successfully. |
| * @stable ICU 2.0 |
| */ |
| GregorianCalendar(TimeZone* zoneToAdopt, UErrorCode& success); |
| |
| /** |
| * Constructs a GregorianCalendar based on the current time in the given time zone |
| * with the default locale. |
| * |
| * @param zone The given timezone. |
| * @param success Indicates the status of GregorianCalendar object construction. |
| * Returns U_ZERO_ERROR if constructed successfully. |
| * @stable ICU 2.0 |
| */ |
| GregorianCalendar(const TimeZone& zone, UErrorCode& success); |
| |
| /** |
| * Constructs a GregorianCalendar based on the current time in the default time zone |
| * with the given locale. |
| * |
| * @param aLocale The given locale. |
| * @param success Indicates the status of GregorianCalendar object construction. |
| * Returns U_ZERO_ERROR if constructed successfully. |
| * @stable ICU 2.0 |
| */ |
| GregorianCalendar(const Locale& aLocale, UErrorCode& success); |
| |
| /** |
| * Constructs a GregorianCalendar based on the current time in the given time zone |
| * with the given locale. Clients are no longer responsible for deleting the given |
| * time zone object after it's adopted. |
| * |
| * @param zoneToAdopt The given timezone. |
| * @param aLocale The given locale. |
| * @param success Indicates the status of GregorianCalendar object construction. |
| * Returns U_ZERO_ERROR if constructed successfully. |
| * @stable ICU 2.0 |
| */ |
| GregorianCalendar(TimeZone* zoneToAdopt, const Locale& aLocale, UErrorCode& success); |
| |
| /** |
| * Constructs a GregorianCalendar based on the current time in the given time zone |
| * with the given locale. |
| * |
| * @param zone The given timezone. |
| * @param aLocale The given locale. |
| * @param success Indicates the status of GregorianCalendar object construction. |
| * Returns U_ZERO_ERROR if constructed successfully. |
| * @stable ICU 2.0 |
| */ |
| GregorianCalendar(const TimeZone& zone, const Locale& aLocale, UErrorCode& success); |
| |
| /** |
| * Constructs a GregorianCalendar with the given AD date set in the default time |
| * zone with the default locale. |
| * |
| * @param year The value used to set the YEAR time field in the calendar. |
| * @param month The value used to set the MONTH time field in the calendar. Month |
| * value is 0-based. e.g., 0 for January. |
| * @param date The value used to set the DATE time field in the calendar. |
| * @param success Indicates the status of GregorianCalendar object construction. |
| * Returns U_ZERO_ERROR if constructed successfully. |
| * @stable ICU 2.0 |
| */ |
| GregorianCalendar(int32_t year, int32_t month, int32_t date, UErrorCode& success); |
| |
| /** |
| * Constructs a GregorianCalendar with the given AD date and time set for the |
| * default time zone with the default locale. |
| * |
| * @param year The value used to set the YEAR time field in the calendar. |
| * @param month The value used to set the MONTH time field in the calendar. Month |
| * value is 0-based. e.g., 0 for January. |
| * @param date The value used to set the DATE time field in the calendar. |
| * @param hour The value used to set the HOUR_OF_DAY time field in the calendar. |
| * @param minute The value used to set the MINUTE time field in the calendar. |
| * @param success Indicates the status of GregorianCalendar object construction. |
| * Returns U_ZERO_ERROR if constructed successfully. |
| * @stable ICU 2.0 |
| */ |
| GregorianCalendar(int32_t year, int32_t month, int32_t date, int32_t hour, int32_t minute, UErrorCode& success); |
| |
| /** |
| * Constructs a GregorianCalendar with the given AD date and time set for the |
| * default time zone with the default locale. |
| * |
| * @param year The value used to set the YEAR time field in the calendar. |
| * @param month The value used to set the MONTH time field in the calendar. Month |
| * value is 0-based. e.g., 0 for January. |
| * @param date The value used to set the DATE time field in the calendar. |
| * @param hour The value used to set the HOUR_OF_DAY time field in the calendar. |
| * @param minute The value used to set the MINUTE time field in the calendar. |
| * @param second The value used to set the SECOND time field in the calendar. |
| * @param success Indicates the status of GregorianCalendar object construction. |
| * Returns U_ZERO_ERROR if constructed successfully. |
| * @stable ICU 2.0 |
| */ |
| GregorianCalendar(int32_t year, int32_t month, int32_t date, int32_t hour, int32_t minute, int32_t second, UErrorCode& success); |
| |
| /** |
| * Destructor |
| * @stable ICU 2.0 |
| */ |
| virtual ~GregorianCalendar(); |
| |
| /** |
| * Copy constructor |
| * @param source the object to be copied. |
| * @stable ICU 2.0 |
| */ |
| GregorianCalendar(const GregorianCalendar& source); |
| |
| /** |
| * Default assignment operator |
| * @param right the object to be copied. |
| * @stable ICU 2.0 |
| */ |
| GregorianCalendar& operator=(const GregorianCalendar& right); |
| |
| /** |
| * Create and return a polymorphic copy of this calendar. |
| * @return return a polymorphic copy of this calendar. |
| * @stable ICU 2.0 |
| */ |
| virtual Calendar* clone(void) const; |
| |
| /** |
| * Sets the GregorianCalendar change date. This is the point when the switch from |
| * Julian dates to Gregorian dates occurred. Default is 00:00:00 local time, October |
| * 15, 1582. Previous to this time and date will be Julian dates. |
| * |
| * @param date The given Gregorian cutover date. |
| * @param success Output param set to success/failure code on exit. |
| * @stable ICU 2.0 |
| */ |
| void setGregorianChange(UDate date, UErrorCode& success); |
| |
| /** |
| * Gets the Gregorian Calendar change date. This is the point when the switch from |
| * Julian dates to Gregorian dates occurred. Default is 00:00:00 local time, October |
| * 15, 1582. Previous to this time and date will be Julian dates. |
| * |
| * @return The Gregorian cutover time for this calendar. |
| * @stable ICU 2.0 |
| */ |
| UDate getGregorianChange(void) const; |
| |
| /** |
| * Return true if the given year is a leap year. Determination of whether a year is |
| * a leap year is actually very complicated. We do something crude and mostly |
| * correct here, but for a real determination you need a lot of contextual |
| * information. For example, in Sweden, the change from Julian to Gregorian happened |
| * in a complex way resulting in missed leap years and double leap years between |
| * 1700 and 1753. Another example is that after the start of the Julian calendar in |
| * 45 B.C., the leap years did not regularize until 8 A.D. This method ignores these |
| * quirks, and pays attention only to the Julian onset date and the Gregorian |
| * cutover (which can be changed). |
| * |
| * @param year The given year. |
| * @return True if the given year is a leap year; false otherwise. |
| * @stable ICU 2.0 |
| */ |
| UBool isLeapYear(int32_t year) const; |
| |
| /** |
| * Returns TRUE if the given Calendar object is equivalent to this |
| * one. Calendar override. |
| * |
| * @param other the Calendar to be compared with this Calendar |
| * @stable ICU 2.4 |
| */ |
| virtual UBool isEquivalentTo(const Calendar& other) const; |
| |
| /** |
| * (Overrides Calendar) Rolls up or down by the given amount in the specified field. |
| * For more information, see the documentation for Calendar::roll(). |
| * |
| * @param field The time field. |
| * @param amount Indicates amount to roll. |
| * @param status Output param set to success/failure code on exit. If any value |
| * previously set in the time field is invalid, this will be set to |
| * an error status. |
| * @deprecated ICU 2.6. Use roll(UCalendarDateFields field, int32_t amount, UErrorCode& status) instead. |
| */ |
| virtual void roll(EDateFields field, int32_t amount, UErrorCode& status); |
| |
| /** |
| * (Overrides Calendar) Rolls up or down by the given amount in the specified field. |
| * For more information, see the documentation for Calendar::roll(). |
| * |
| * @param field The time field. |
| * @param amount Indicates amount to roll. |
| * @param status Output param set to success/failure code on exit. If any value |
| * previously set in the time field is invalid, this will be set to |
| * an error status. |
| * @stable ICU 2.6. |
| */ |
| virtual void roll(UCalendarDateFields field, int32_t amount, UErrorCode& status); |
| |
| /** |
| * Return the minimum value that this field could have, given the current date. |
| * For the Gregorian calendar, this is the same as getMinimum() and getGreatestMinimum(). |
| * @param field the time field. |
| * @return the minimum value that this field could have, given the current date. |
| * @deprecated ICU 2.6. Use getActualMinimum(UCalendarDateFields field) instead. |
| */ |
| int32_t getActualMinimum(EDateFields field) const; |
| |
| /** |
| * Return the minimum value that this field could have, given the current date. |
| * For the Gregorian calendar, this is the same as getMinimum() and getGreatestMinimum(). |
| * @param field the time field. |
| * @param status |
| * @return the minimum value that this field could have, given the current date. |
| * @deprecated ICU 2.6. Use getActualMinimum(UCalendarDateFields field) instead. (Added to ICU 3.0 for signature consistency) |
| */ |
| int32_t getActualMinimum(EDateFields field, UErrorCode& status) const; |
| |
| /** |
| * Return the minimum value that this field could have, given the current date. |
| * For the Gregorian calendar, this is the same as getMinimum() and getGreatestMinimum(). |
| * @param field the time field. |
| * @param status error result. |
| * @return the minimum value that this field could have, given the current date. |
| * @stable ICU 3.0 |
| */ |
| int32_t getActualMinimum(UCalendarDateFields field, UErrorCode &status) const; |
| |
| /** |
| * Return the maximum value that this field could have, given the current date. |
| * For example, with the date "Feb 3, 1997" and the DAY_OF_MONTH field, the actual |
| * maximum would be 28; for "Feb 3, 1996" it s 29. Similarly for a Hebrew calendar, |
| * for some years the actual maximum for MONTH is 12, and for others 13. |
| * @param field the time field. |
| * @return the maximum value that this field could have, given the current date. |
| * @deprecated ICU 2.6. Use getActualMaximum(UCalendarDateFields field) instead. |
| */ |
| int32_t getActualMaximum(EDateFields field) const; |
| |
| /** |
| * Return the maximum value that this field could have, given the current date. |
| * For example, with the date "Feb 3, 1997" and the DAY_OF_MONTH field, the actual |
| * maximum would be 28; for "Feb 3, 1996" it s 29. Similarly for a Hebrew calendar, |
| * for some years the actual maximum for MONTH is 12, and for others 13. |
| * @param field the time field. |
| * @param status returns any errors that may result from this function call. |
| * @return the maximum value that this field could have, given the current date. |
| * @stable ICU 2.6 |
| */ |
| virtual int32_t getActualMaximum(UCalendarDateFields field, UErrorCode& status) const; |
| |
| /** |
| * (Overrides Calendar) Return true if the current date for this Calendar is in |
| * Daylight Savings Time. Recognizes DST_OFFSET, if it is set. |
| * |
| * @param status Fill-in parameter which receives the status of this operation. |
| * @return True if the current date for this Calendar is in Daylight Savings Time, |
| * false, otherwise. |
| * @stable ICU 2.0 |
| */ |
| virtual UBool inDaylightTime(UErrorCode& status) const; |
| |
| public: |
| |
| /** |
| * Override Calendar Returns a unique class ID POLYMORPHICALLY. Pure virtual |
| * override. This method is to implement a simple version of RTTI, since not all C++ |
| * compilers support genuine RTTI. Polymorphic operator==() and clone() methods call |
| * this method. |
| * |
| * @return The class ID for this object. All objects of a given class have the |
| * same class ID. Objects of other classes have different class IDs. |
| * @stable ICU 2.0 |
| */ |
| virtual UClassID getDynamicClassID(void) const; |
| |
| /** |
| * Return the class ID for this class. This is useful only for comparing to a return |
| * value from getDynamicClassID(). For example: |
| * |
| * Base* polymorphic_pointer = createPolymorphicObject(); |
| * if (polymorphic_pointer->getDynamicClassID() == |
| * Derived::getStaticClassID()) ... |
| * |
| * @return The class ID for all objects of this class. |
| * @stable ICU 2.0 |
| */ |
| static UClassID U_EXPORT2 getStaticClassID(void); |
| |
| /** |
| * Get the calendar type, "gregorian", for use in DateFormatSymbols. |
| * |
| * @return calendar type |
| * @internal |
| */ |
| virtual const char * getType() const; |
| |
| protected: |
| |
| /** |
| * (Overrides Calendar) Converts GMT as milliseconds to time field values. |
| * @param status Fill-in parameter which receives the status of this operation. |
| * @stable ICU 2.0 |
| */ |
| |
| private: |
| GregorianCalendar(); // default constructor not implemented |
| |
| protected: |
| /** |
| * Return the ERA. We need a special method for this because the |
| * default ERA is AD, but a zero (unset) ERA is BC. |
| * @return the ERA. |
| * @internal |
| */ |
| virtual int32_t internalGetEra() const; |
| |
| /** |
| * Return the Julian day number of day before the first day of the |
| * given month in the given extended year. Subclasses should override |
| * this method to implement their calendar system. |
| * @param eyear the extended year |
| * @param month the zero-based month, or 0 if useMonth is false |
| * @param useMonth if false, compute the day before the first day of |
| * the given year, otherwise, compute the day before the first day of |
| * the given month |
| * @return the Julian day number of the day before the first |
| * day of the given month and year |
| * @internal |
| */ |
| virtual int32_t handleComputeMonthStart(int32_t eyear, int32_t month, |
| UBool useMonth) const; |
| |
| /** |
| * Subclasses may override this. This method calls |
| * handleGetMonthLength() to obtain the calendar-specific month |
| * length. |
| * @param bestField which field to use to calculate the date |
| * @return julian day specified by calendar fields. |
| * @internal |
| */ |
| virtual int32_t handleComputeJulianDay(UCalendarDateFields bestField) ; |
| |
| /** |
| * Return the number of days in the given month of the given extended |
| * year of this calendar system. Subclasses should override this |
| * method if they can provide a more correct or more efficient |
| * implementation than the default implementation in Calendar. |
| * @internal |
| */ |
| virtual int32_t handleGetMonthLength(int32_t extendedYear, int32_t month) const; |
| |
| /** |
| * Return the number of days in the given extended year of this |
| * calendar system. Subclasses should override this method if they can |
| * provide a more correct or more efficient implementation than the |
| * default implementation in Calendar. |
| * @stable ICU 2.0 |
| */ |
| virtual int32_t handleGetYearLength(int32_t eyear) const; |
| |
| /** |
| * return the length of the given month. |
| * @param month the given month. |
| * @return the length of the given month. |
| * @internal |
| */ |
| virtual int32_t monthLength(int32_t month) const; |
| |
| /** |
| * return the length of the month according to the given year. |
| * @param month the given month. |
| * @param year the given year. |
| * @return the length of the month |
| * @internal |
| */ |
| virtual int32_t monthLength(int32_t month, int32_t year) const; |
| |
| /** |
| * return the length of the given year. |
| * @param year the given year. |
| * @return the length of the given year. |
| * @internal |
| */ |
| int32_t yearLength(int32_t year) const; |
| |
| /** |
| * return the length of the year field. |
| * @return the length of the year field |
| * @internal |
| */ |
| int32_t yearLength(void) const; |
| |
| /** |
| * After adjustments such as add(MONTH), add(YEAR), we don't want the |
| * month to jump around. E.g., we don't want Jan 31 + 1 month to go to Mar |
| * 3, we want it to go to Feb 28. Adjustments which might run into this |
| * problem call this method to retain the proper month. |
| * @internal |
| */ |
| void pinDayOfMonth(void); |
| |
| /** |
| * Return the day number with respect to the epoch. January 1, 1970 (Gregorian) |
| * is day zero. |
| * @param status Fill-in parameter which receives the status of this operation. |
| * @return the day number with respect to the epoch. |
| * @internal |
| */ |
| virtual UDate getEpochDay(UErrorCode& status); |
| |
| /** |
| * Subclass API for defining limits of different types. |
| * Subclasses must implement this method to return limits for the |
| * following fields: |
| * |
| * <pre>UCAL_ERA |
| * UCAL_YEAR |
| * UCAL_MONTH |
| * UCAL_WEEK_OF_YEAR |
| * UCAL_WEEK_OF_MONTH |
| * UCAL_DATE (DAY_OF_MONTH on Java) |
| * UCAL_DAY_OF_YEAR |
| * UCAL_DAY_OF_WEEK_IN_MONTH |
| * UCAL_YEAR_WOY |
| * UCAL_EXTENDED_YEAR</pre> |
| * |
| * @param field one of the above field numbers |
| * @param limitType one of <code>MINIMUM</code>, <code>GREATEST_MINIMUM</code>, |
| * <code>LEAST_MAXIMUM</code>, or <code>MAXIMUM</code> |
| * @internal |
| */ |
| virtual int32_t handleGetLimit(UCalendarDateFields field, ELimitType limitType) const; |
| |
| /** |
| * Return the extended year defined by the current fields. This will |
| * use the UCAL_EXTENDED_YEAR field or the UCAL_YEAR and supra-year fields (such |
| * as UCAL_ERA) specific to the calendar system, depending on which set of |
| * fields is newer. |
| * @return the extended year |
| * @internal |
| */ |
| virtual int32_t handleGetExtendedYear(); |
| |
| /** |
| * Subclasses may override this to convert from week fields |
| * (YEAR_WOY and WEEK_OF_YEAR) to an extended year in the case |
| * where YEAR, EXTENDED_YEAR are not set. |
| * The Gregorian implementation assumes a yearWoy in gregorian format, according to the current era. |
| * @return the extended year, UCAL_EXTENDED_YEAR |
| * @internal |
| */ |
| virtual int32_t handleGetExtendedYearFromWeekFields(int32_t yearWoy, int32_t woy); |
| |
| |
| /** |
| * Subclasses may override this method to compute several fields |
| * specific to each calendar system. These are: |
| * |
| * <ul><li>ERA |
| * <li>YEAR |
| * <li>MONTH |
| * <li>DAY_OF_MONTH |
| * <li>DAY_OF_YEAR |
| * <li>EXTENDED_YEAR</ul> |
| * |
| * <p>The GregorianCalendar implementation implements |
| * a calendar with the specified Julian/Gregorian cutover date. |
| * @internal |
| */ |
| virtual void handleComputeFields(int32_t julianDay, UErrorCode &status); |
| |
| private: |
| /** |
| * Compute the julian day number of the given year. |
| * @param isGregorian if true, using Gregorian calendar, otherwise using Julian calendar |
| * @param year the given year. |
| * @param isLeap true if the year is a leap year. |
| * @return |
| */ |
| static double computeJulianDayOfYear(UBool isGregorian, int32_t year, |
| UBool& isLeap); |
| |
| /** |
| * Validates the values of the set time fields. True if they're all valid. |
| * @return True if the set time fields are all valid. |
| */ |
| UBool validateFields(void) const; |
| |
| /** |
| * Validates the value of the given time field. True if it's valid. |
| */ |
| UBool boundsCheck(int32_t value, UCalendarDateFields field) const; |
| |
| /** |
| * Return the pseudo-time-stamp for two fields, given their |
| * individual pseudo-time-stamps. If either of the fields |
| * is unset, then the aggregate is unset. Otherwise, the |
| * aggregate is the later of the two stamps. |
| * @param stamp_a One given field. |
| * @param stamp_b Another given field. |
| * @return the pseudo-time-stamp for two fields |
| */ |
| int32_t aggregateStamp(int32_t stamp_a, int32_t stamp_b); |
| |
| /** |
| * The point at which the Gregorian calendar rules are used, measured in |
| * milliseconds from the standard epoch. Default is October 15, 1582 |
| * (Gregorian) 00:00:00 UTC, that is, October 4, 1582 (Julian) is followed |
| * by October 15, 1582 (Gregorian). This corresponds to Julian day number |
| * 2299161. This is measured from the standard epoch, not in Julian Days. |
| * @internal |
| */ |
| UDate fGregorianCutover; |
| |
| /** |
| * Julian day number of the Gregorian cutover |
| */ |
| int32_t fCutoverJulianDay; |
| |
| /** |
| * Midnight, local time (using this Calendar's TimeZone) at or before the |
| * gregorianCutover. This is a pure date value with no time of day or |
| * timezone component. |
| */ |
| UDate fNormalizedGregorianCutover;// = gregorianCutover; |
| |
| /** |
| * The year of the gregorianCutover, with 0 representing |
| * 1 BC, -1 representing 2 BC, etc. |
| */ |
| int32_t fGregorianCutoverYear;// = 1582; |
| |
| /** |
| * The year of the gregorianCutover, with 0 representing |
| * 1 BC, -1 representing 2 BC, etc. |
| */ |
| int32_t fGregorianCutoverJulianDay;// = 2299161; |
| |
| /** |
| * Converts time as milliseconds to Julian date. The Julian date used here is not a |
| * true Julian date, since it is measured from midnight, not noon. |
| * |
| * @param millis The given milliseconds. |
| * @return The Julian date number. |
| */ |
| static double millisToJulianDay(UDate millis); |
| |
| /** |
| * Converts Julian date to time as milliseconds. The Julian date used here is not a |
| * true Julian date, since it is measured from midnight, not noon. |
| * |
| * @param julian The given Julian date number. |
| * @return Time as milliseconds. |
| */ |
| static UDate julianDayToMillis(double julian); |
| |
| /** |
| * Used by handleComputeJulianDay() and handleComputeMonthStart(). |
| * Temporary field indicating whether the calendar is currently Gregorian as opposed to Julian. |
| */ |
| UBool fIsGregorian; |
| |
| /** |
| * Used by handleComputeJulianDay() and handleComputeMonthStart(). |
| * Temporary field indicating that the sense of the gregorian cutover should be inverted |
| * to handle certain calculations on and around the cutover date. |
| */ |
| UBool fInvertGregorian; |
| |
| |
| public: // internal implementation |
| |
| /** |
| * @internal |
| * @return TRUE if this calendar has the notion of a default century |
| */ |
| virtual UBool haveDefaultCentury() const; |
| |
| /** |
| * @internal |
| * @return the start of the default century |
| */ |
| virtual UDate defaultCenturyStart() const; |
| |
| /** |
| * @internal |
| * @return the beginning year of the default century |
| */ |
| virtual int32_t defaultCenturyStartYear() const; |
| |
| private: |
| /** |
| * The system maintains a static default century start date. This is initialized |
| * the first time it is used. Before then, it is set to SYSTEM_DEFAULT_CENTURY to |
| * indicate an uninitialized state. Once the system default century date and year |
| * are set, they do not change. |
| */ |
| static UDate fgSystemDefaultCenturyStart; |
| |
| /** |
| * See documentation for systemDefaultCenturyStart. |
| */ |
| static int32_t fgSystemDefaultCenturyStartYear; |
| |
| /** |
| * Default value that indicates the defaultCenturyStartYear is unitialized |
| */ |
| static const int32_t fgSystemDefaultCenturyYear; |
| |
| /** |
| * Default value that indicates the UDate of the beginning of the system default century |
| */ |
| static const UDate fgSystemDefaultCentury; |
| |
| /** |
| * Returns the beginning date of the 100-year window that dates with 2-digit years |
| * are considered to fall within. |
| * @return the beginning date of the 100-year window that dates with 2-digit years |
| * are considered to fall within. |
| */ |
| UDate internalGetDefaultCenturyStart(void) const; |
| |
| /** |
| * Returns the first year of the 100-year window that dates with 2-digit years |
| * are considered to fall within. |
| * @return the first year of the 100-year window that dates with 2-digit years |
| * are considered to fall within. |
| */ |
| int32_t internalGetDefaultCenturyStartYear(void) const; |
| |
| /** |
| * Initializes the 100-year window that dates with 2-digit years are considered |
| * to fall within so that its start date is 80 years before the current time. |
| */ |
| static void initializeSystemDefaultCentury(void); |
| |
| }; |
| |
| U_NAMESPACE_END |
| |
| #endif /* #if !UCONFIG_NO_FORMATTING */ |
| |
| #endif // _GREGOCAL |
| //eof |
| |
