The Tor Browser: intl/icu/source/i18n/hebrwcal.h@fc2d59ddac77 (annotated)

intl/icu/source/i18n/hebrwcal.h@fc2d59ddac77 (annotated)

intl/icu/source/i18n/hebrwcal.h

Wed, 31 Dec 2014 07:22:50 +0100

author: Michael Schloh von Bennewitz <michael@schloh.com>
date: Wed, 31 Dec 2014 07:22:50 +0100
branch: TOR_BUG_3246
changeset 4: fc2d59ddac77
permissions: -rw-r--r--

Correct previous dual key logic pending first delivery installment.

 /*
 ******************************************************************************
 * 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);
     /**
      * 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: // 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

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intl/icu/source/i18n/hebrwcal.h@fc2d59ddac77 (annotated)

intl/icu/source/i18n/hebrwcal.h