| /* |
| ****************************************************************************** |
| * Copyright (C) 2003-2009, International Business Machines Corporation |
| * and others. All Rights Reserved. |
| ****************************************************************************** |
| * |
| * File HEBRWCAL.H |
| * |
| * Modification History: |
| * |
| * Date Name Description |
| * 05/13/2003 srl copied from gregocal.h |
| * 11/26/2003 srl copied from buddhcal.h |
| ****************************************************************************** |
| */ |
| |
| #ifndef HEBRWCAL_H |
| #define HEBRWCAL_H |
| |
| #include "unicode/utypes.h" |
| |
| #if !UCONFIG_NO_FORMATTING |
| |
| #include "unicode/calendar.h" |
| #include "unicode/gregocal.h" |
| |
| U_NAMESPACE_BEGIN |
| |
| /** |
| * <code>HebrewCalendar</code> is a subclass of <code>Calendar</code> |
| * that that implements the traditional Hebrew calendar. |
| * This is the civil calendar in Israel and the liturgical calendar |
| * of the Jewish faith worldwide. |
| * <p> |
| * The Hebrew calendar is lunisolar and thus has a number of interesting |
| * properties that distinguish it from the Gregorian. Months start |
| * on the day of (an arithmetic approximation of) each new moon. Since the |
| * solar year (approximately 365.24 days) is not an even multiple of |
| * the lunar month (approximately 29.53 days) an extra "leap month" is |
| * inserted in 7 out of every 19 years. To make matters even more |
| * interesting, the start of a year can be delayed by up to three days |
| * in order to prevent certain holidays from falling on the Sabbath and |
| * to prevent certain illegal year lengths. Finally, the lengths of certain |
| * months can vary depending on the number of days in the year. |
| * <p> |
| * The leap month is known as "Adar 1" and is inserted between the |
| * months of Shevat and Adar in leap years. Since the leap month does |
| * not come at the end of the year, calculations involving |
| * month numbers are particularly complex. Users of this class should |
| * make sure to use the {@link #roll roll} and {@link #add add} methods |
| * rather than attempting to perform date arithmetic by manipulating |
| * the fields directly. |
| * <p> |
| * <b>Note:</b> In the traditional Hebrew calendar, days start at sunset. |
| * However, in order to keep the time fields in this class |
| * synchronized with those of the other calendars and with local clock time, |
| * we treat days and months as beginning at midnight, |
| * roughly 6 hours after the corresponding sunset. |
| * <p> |
| * If you are interested in more information on the rules behind the Hebrew |
| * calendar, see one of the following references: |
| * <ul> |
| * <li>"<a href="http://www.amazon.com/exec/obidos/ASIN/0521564743">Calendrical Calculations</a>", |
| * by Nachum Dershowitz & Edward Reingold, Cambridge University Press, 1997, pages 85-91. |
| * |
| * <li>Hebrew Calendar Science and Myths, |
| * <a href="http://www.geocities.com/Athens/1584/"> |
| * http://www.geocities.com/Athens/1584/</a> |
| * |
| * <li>The Calendar FAQ, |
| * <a href="http://www.faqs.org/faqs/calendars/faq/"> |
| * http://www.faqs.org/faqs/calendars/faq/</a> |
| * </ul> |
| * <p> |
| * @see com.ibm.icu.util.GregorianCalendar |
| * |
| * @author Laura Werner |
| * @author Alan Liu |
| * @author Steven R. Loomis |
| * <p> |
| * @internal |
| */ |
| class U_I18N_API HebrewCalendar : public Calendar { |
| public: |
| /** |
| * Useful constants for HebrewCalendar. |
| * @internal |
| */ |
| enum EEras { |
| /** |
| * Constant for Tishri, the 1st month of the Hebrew year. |
| */ |
| TISHRI, |
| /** |
| * Constant for Heshvan, the 2nd month of the Hebrew year. |
| */ |
| HESHVAN, |
| /** |
| * Constant for Kislev, the 3rd month of the Hebrew year. |
| */ |
| KISLEV, |
| |
| /** |
| * Constant for Tevet, the 4th month of the Hebrew year. |
| */ |
| TEVET, |
| |
| /** |
| * Constant for Shevat, the 5th month of the Hebrew year. |
| */ |
| SHEVAT, |
| |
| /** |
| * Constant for Adar I, the 6th month of the Hebrew year |
| * (present in leap years only). In non-leap years, the calendar |
| * jumps from Shevat (5th month) to Adar (7th month). |
| */ |
| ADAR_1, |
| |
| /** |
| * Constant for the Adar, the 7th month of the Hebrew year. |
| */ |
| ADAR, |
| |
| /** |
| * Constant for Nisan, the 8th month of the Hebrew year. |
| */ |
| NISAN, |
| |
| /** |
| * Constant for Iyar, the 9th month of the Hebrew year. |
| */ |
| IYAR, |
| |
| /** |
| * Constant for Sivan, the 10th month of the Hebrew year. |
| */ |
| SIVAN, |
| |
| /** |
| * Constant for Tammuz, the 11th month of the Hebrew year. |
| */ |
| TAMUZ, |
| |
| /** |
| * Constant for Av, the 12th month of the Hebrew year. |
| */ |
| AV, |
| |
| /** |
| * Constant for Elul, the 13th month of the Hebrew year. |
| */ |
| ELUL |
| }; |
| |
| /** |
| * Constructs a HebrewCalendar 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 HebrewCalendar object construction. |
| * Returns U_ZERO_ERROR if constructed successfully. |
| * @internal |
| */ |
| HebrewCalendar(const Locale& aLocale, UErrorCode& success); |
| |
| |
| /** |
| * Destructor |
| * @internal |
| */ |
| virtual ~HebrewCalendar(); |
| |
| /** |
| * Copy constructor |
| * @param source the object to be copied. |
| * @internal |
| */ |
| HebrewCalendar(const HebrewCalendar& source); |
| |
| /** |
| * Default assignment operator |
| * @param right the object to be copied. |
| * @internal |
| */ |
| HebrewCalendar& operator=(const HebrewCalendar& right); |
| |
| /** |
| * Create and return a polymorphic copy of this calendar. |
| * @return return a polymorphic copy of this calendar. |
| * @internal |
| */ |
| virtual Calendar* clone(void) 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. |
| * @internal |
| */ |
| 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. |
| * @internal |
| */ |
| static UClassID U_EXPORT2 getStaticClassID(void); |
| |
| /** |
| * return the calendar type, "hebrew". |
| * |
| * @return calendar type |
| * @internal |
| */ |
| virtual const char * getType() const; |
| |
| |
| // Calendar API |
| public: |
| /** |
| * (Overrides Calendar) UDate Arithmetic function. Adds the specified (signed) amount |
| * of time to the given time field, based on the calendar's rules. For more |
| * information, see the documentation for Calendar::add(). |
| * |
| * @param field The time field. |
| * @param amount The amount of date or time to be added to the field. |
| * @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. |
| */ |
| virtual void add(UCalendarDateFields field, int32_t amount, UErrorCode& status); |
| /** |
| * @deprecated ICU 2.6 use UCalendarDateFields instead of EDateFields |
| */ |
| virtual void add(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. |
| * @internal |
| */ |
| virtual void roll(UCalendarDateFields 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. |
| * @deprecated ICU 2.6. Use roll(UCalendarDateFields field, int32_t amount, UErrorCode& status) instead. |
| ` */ |
| virtual void roll(EDateFields field, int32_t amount, UErrorCode& status); |
| |
| /** |
| * @internal |
| */ |
| static UBool isLeapYear(int32_t year) ; |
| |
| protected: |
| |
| /** |
| * 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 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; |
| /** |
| * 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); |
| /** |
| * 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(); |
| /** |
| * 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 |
| * @param 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; |
| |
| |
| |
| protected: |
| |
| /** |
| * (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. |
| * @internal |
| */ |
| virtual UBool inDaylightTime(UErrorCode& status) const; |
| |
| /** |
| * Returns TRUE because the Hebrew Calendar does have a default century |
| * @internal |
| */ |
| virtual UBool haveDefaultCentury() const; |
| |
| /** |
| * Returns the date of the start of the default century |
| * @return start of century - in milliseconds since epoch, 1970 |
| * @internal |
| */ |
| virtual UDate defaultCenturyStart() const; |
| |
| /** |
| * Returns the year in which the default century begins |
| * @internal |
| */ |
| virtual int32_t defaultCenturyStartYear() const; |
| |
| private: // default century stuff. |
| /** |
| * 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; |
| |
| /** |
| * start of default century, as a date |
| */ |
| static const UDate fgSystemDefaultCentury; |
| |
| /** |
| * Returns 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. |
| */ |
| 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); |
| |
| private: // Calendar-specific implementation |
| /** |
| * Finds the day # of the first day in the given Hebrew year. |
| * To do this, we want to calculate the time of the Tishri 1 new moon |
| * in that year. |
| * <p> |
| * The algorithm here is similar to ones described in a number of |
| * references, including: |
| * <ul> |
| * <li>"Calendrical Calculations", by Nachum Dershowitz & Edward Reingold, |
| * Cambridge University Press, 1997, pages 85-91. |
| * |
| * <li>Hebrew Calendar Science and Myths, |
| * <a href="http://www.geocities.com/Athens/1584/"> |
| * http://www.geocities.com/Athens/1584/</a> |
| * |
| * <li>The Calendar FAQ, |
| * <a href="http://www.faqs.org/faqs/calendars/faq/"> |
| * http://www.faqs.org/faqs/calendars/faq/</a> |
| * </ul> |
| * @param year extended year |
| * @return day number (JD) |
| * @internal |
| */ |
| static int32_t startOfYear(int32_t year, UErrorCode& status); |
| |
| static int32_t absoluteDayToDayOfWeek(int32_t day) ; |
| |
| /** |
| * @internal |
| */ |
| int32_t yearType(int32_t year) const; |
| |
| /** |
| * @internal |
| */ |
| static int32_t monthsInYear(int32_t year) ; |
| }; |
| |
| U_NAMESPACE_END |
| |
| #endif /* #if !UCONFIG_NO_FORMATTING */ |
| |
| #endif |
| //eof |
| |
