446 lines
14 KiB
C++
446 lines
14 KiB
C++
// © 2016 and later: Unicode, Inc. and others.
|
|
// License & terms of use: http://www.unicode.org/copyright.html
|
|
/*
|
|
******************************************************************************
|
|
* Copyright (C) 2003-2013, 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);
|
|
|
|
/**
|
|
* Create and return a polymorphic copy of this calendar.
|
|
* @return return a polymorphic copy of this calendar.
|
|
* @internal
|
|
*/
|
|
virtual HebrewCalendar* clone() const override;
|
|
|
|
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 override;
|
|
|
|
/**
|
|
* 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 override;
|
|
|
|
|
|
// 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) override;
|
|
/**
|
|
* @deprecated ICU 2.6 use UCalendarDateFields instead of EDateFields
|
|
*/
|
|
virtual void add(EDateFields field, int32_t amount, UErrorCode& status) override;
|
|
|
|
|
|
/**
|
|
* (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) override;
|
|
|
|
/**
|
|
* (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) override;
|
|
|
|
/**
|
|
* @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 override;
|
|
|
|
/**
|
|
* 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 override;
|
|
|
|
/**
|
|
* 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 override;
|
|
/**
|
|
* 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) override;
|
|
/**
|
|
* 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() override;
|
|
/**
|
|
* 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 override;
|
|
|
|
|
|
/**
|
|
* Validate a single field of this calendar.
|
|
* Overrides Calendar::validateField(int) to provide
|
|
* special handling for month validation for Hebrew calendar.
|
|
* @internal
|
|
*/
|
|
virtual void validateField(UCalendarDateFields field, UErrorCode &status) override;
|
|
|
|
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 override;
|
|
|
|
/**
|
|
* Returns true because the Hebrew Calendar does have a default century
|
|
* @internal
|
|
*/
|
|
virtual UBool haveDefaultCentury() const override;
|
|
|
|
/**
|
|
* Returns the date of the start of the default century
|
|
* @return start of century - in milliseconds since epoch, 1970
|
|
* @internal
|
|
*/
|
|
virtual UDate defaultCenturyStart() const override;
|
|
|
|
/**
|
|
* Returns the year in which the default century begins
|
|
* @internal
|
|
*/
|
|
virtual int32_t defaultCenturyStartYear() const override;
|
|
|
|
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
|
|
|