Calendar is an abstract base class for converting between
+ * a UDate object and a set of integer fields such as
+ * YEAR, MONTH, DAY, HOUR,
+ * and so on. (A UDate object represents a specific instant in
+ * time with millisecond precision. See UDate
+ * for information about the UDate class.)
+ *
+ *
+ * Subclasses of Calendar interpret a UDate
+ * according to the rules of a specific calendar system.
+ * The most commonly used subclass of Calendar is
+ * GregorianCalendar. Other subclasses could represent
+ * the various types of lunar calendars in use in many parts of the world.
+ *
+ *
+ * NOTE: (ICU 2.6) The subclass interface should be considered unstable + * - it WILL change. + * + *
+ * Like other locale-sensitive classes, Calendar provides a
+ * static method, createInstance, for getting a generally useful
+ * object of this type. Calendar's createInstance method
+ * returns the appropriate Calendar subclass whose
+ * time fields have been initialized with the current date and time:
+ * \htmlonly
\endhtmlonly + *\endhtmlonly + * + *+ * Calendar *rightNow = Calendar::createInstance(errCode); + *+ * \htmlonly
+ * A Calendar object can produce all the time field values
+ * needed to implement the date-time formatting for a particular language
+ * and calendar style (for example, Japanese-Gregorian, Japanese-Traditional).
+ *
+ *
+ * When computing a UDate from time fields, some special circumstances
+ * may arise: there may be insufficient information to compute the
+ * UDate (such as only year and month but no day in the month),
+ * there may be inconsistent information (such as "Tuesday, July 15, 1996"
+ * -- July 15, 1996 is actually a Monday), or the input time might be ambiguous
+ * because of time zone transition.
+ *
+ *
+ * Insufficient information. The calendar will use default + * information to specify the missing fields. This may vary by calendar; for + * the Gregorian calendar, the default for a field is the same as that of the + * start of the epoch: i.e., YEAR = 1970, MONTH = JANUARY, DATE = 1, etc. + * + *
+ * Inconsistent information. If fields conflict, the calendar + * will give preference to fields set more recently. For example, when + * determining the day, the calendar will look for one of the following + * combinations of fields. The most recent combination, as determined by the + * most recently set single field, will be used. + * + * \htmlonly
\endhtmlonly + *\endhtmlonly + * + * For the time of day: + * + * \htmlonly+ * MONTH + DAY_OF_MONTH + * MONTH + WEEK_OF_MONTH + DAY_OF_WEEK + * MONTH + DAY_OF_WEEK_IN_MONTH + DAY_OF_WEEK + * DAY_OF_YEAR + * DAY_OF_WEEK + WEEK_OF_YEAR + *+ * \htmlonly
\endhtmlonly + *\endhtmlonly + * + *+ * HOUR_OF_DAY + * AM_PM + HOUR + *+ * \htmlonly
+ * Ambiguous Wall Clock Time. When time offset from UTC has + * changed, it produces ambiguous time slot around the transition. For example, + * many US locations observe daylight saving time. On the date switching to daylight + * saving time in US, wall clock time jumps from 1:00 AM (standard) to 2:00 AM + * (daylight). Therefore, wall clock time from 1:00 AM to 1:59 AM do not exist on + * the date. When the input wall time fall into this missing time slot, the ICU + * Calendar resolves the time using the UTC offset before the transition by default. + * In this example, 1:30 AM is interpreted as 1:30 AM standard time (non-exist), + * so the final result will be 2:30 AM daylight time. + * + *
On the date switching back to standard time, wall clock time is moved back one + * hour at 2:00 AM. So wall clock time from 1:00 AM to 1:59 AM occur twice. In this + * case, the ICU Calendar resolves the time using the UTC offset after the transition + * by default. For example, 1:30 AM on the date is resolved as 1:30 AM standard time. + * + *
Ambiguous wall clock time resolution behaviors can be customized by Calendar APIs + * {@link #setRepeatedWallTimeOption} and {@link #setSkippedWallTimeOption}. + * These methods are available in ICU 49 or later versions. + * + *
+ * Note: for some non-Gregorian calendars, different + * fields may be necessary for complete disambiguation. For example, a full + * specification of the historial Arabic astronomical calendar requires year, + * month, day-of-month and day-of-week in some cases. + * + *
+ * Note: There are certain possible ambiguities in + * interpretation of certain singular times, which are resolved in the + * following ways: + *
+ * The date or time format strings are not part of the definition of a + * calendar, as those must be modifiable or overridable by the user at + * runtime. Use {@link DateFormat} + * to format dates. + * + *
+ * Calendar provides an API for field "rolling", where fields
+ * can be incremented or decremented, but wrap around. For example, rolling the
+ * month up in the date December 12, 1996 results in
+ * January 12, 1996.
+ *
+ *
+ * Calendar also provides a date arithmetic function for
+ * adding the specified (signed) amount of time to a particular time field.
+ * For example, subtracting 5 days from the date September 12, 1996
+ * results in September 7, 1996.
+ *
+ *
Supported range + * + *
The allowable range of Calendar has been
+ * narrowed. GregorianCalendar used to attempt to support
+ * the range of dates with millisecond values from
+ * Long.MIN_VALUE to Long.MAX_VALUE.
+ * The new Calendar protocol specifies the
+ * maximum range of supportable dates as those having Julian day numbers
+ * of -0x7F000000 to +0x7F000000. This
+ * corresponds to years from ~5,800,000 BCE to ~5,800,000 CE. Programmers
+ * should use the protected constants in Calendar to
+ * specify an extremely early or extremely late date.
+ * NOTE: Do not use this method -- use roll(EDateFields, int, UErrorCode&) instead. + * + * @param field The time field. + * @param up Indicates if the value of the specified time field is to be rolled + * up or rolled down. Use true if rolling up, false otherwise. + * @param status Output param set to success/failure code on exit. If any value + * previously set in the time field is invalid or restricted by + * leniency, this will be set to an error status. + * @deprecated ICU 2.6. Use roll(UCalendarDateFields field, UBool up, UErrorCode& status) instead. + */ + inline void roll(EDateFields field, UBool up, UErrorCode& status); +#endif /* U_HIDE_DEPRECATED_API */ + + /** + * Time Field Rolling function. Rolls (up/down) a single unit of time on the given + * time field. For example, to roll the current date up by one day, call + * roll(Calendar::DATE, true). When rolling on the year or Calendar::YEAR field, it + * will roll the year value in the range between getMinimum(Calendar::YEAR) and the + * value returned by getMaximum(Calendar::YEAR). When rolling on the month or + * Calendar::MONTH field, other fields like date might conflict and, need to be + * changed. For instance, rolling the month up on the date 01/31/96 will result in + * 02/29/96. Rolling up always means rolling forward in time (unless the limit of the + * field is reached, in which case it may pin or wrap), so for Gregorian calendar, + * starting with 100 BC and rolling the year up results in 99 BC. + * When eras have a definite beginning and end (as in the Chinese calendar, or as in + * most eras in the Japanese calendar) then rolling the year past either limit of the + * era will cause the year to wrap around. When eras only have a limit at one end, + * then attempting to roll the year past that limit will result in pinning the year + * at that limit. Note that for most calendars in which era 0 years move forward in + * time (such as Buddhist, Hebrew, or Islamic), it is possible for add or roll to + * result in negative years for era 0 (that is the only way to represent years before + * the calendar epoch). + * When rolling on the hour-in-day or Calendar::HOUR_OF_DAY field, it will roll the + * hour value in the range between 0 and 23, which is zero-based. + *
+ * NOTE: Do not use this method -- use roll(UCalendarDateFields, int, UErrorCode&) instead. + * + * @param field The time field. + * @param up Indicates if the value of the specified time field is to be rolled + * up or rolled down. Use true if rolling up, false otherwise. + * @param status Output param set to success/failure code on exit. If any value + * previously set in the time field is invalid or restricted by + * leniency, this will be set to an error status. + * @stable ICU 2.6. + */ + inline void roll(UCalendarDateFields field, UBool up, UErrorCode& status); + + /** + * Time Field Rolling function. Rolls by the given amount on the given + * time field. For example, to roll the current date up by one day, call + * roll(Calendar::DATE, +1, status). When rolling on the month or + * Calendar::MONTH field, other fields like date might conflict and, need to be + * changed. For instance, rolling the month up on the date 01/31/96 will result in + * 02/29/96. Rolling by a positive value always means rolling forward in time (unless + * the limit of the field is reached, in which case it may pin or wrap), so for + * Gregorian calendar, starting with 100 BC and rolling the year by + 1 results in 99 BC. + * When eras have a definite beginning and end (as in the Chinese calendar, or as in + * most eras in the Japanese calendar) then rolling the year past either limit of the + * era will cause the year to wrap around. When eras only have a limit at one end, + * then attempting to roll the year past that limit will result in pinning the year + * at that limit. Note that for most calendars in which era 0 years move forward in + * time (such as Buddhist, Hebrew, or Islamic), it is possible for add or roll to + * result in negative years for era 0 (that is the only way to represent years before + * the calendar epoch). + * When rolling on the hour-in-day or Calendar::HOUR_OF_DAY field, it will roll the + * hour value in the range between 0 and 23, which is zero-based. + *
+ * The only difference between roll() and add() is that roll() does not change + * the value of more significant fields when it reaches the minimum or maximum + * of its range, whereas add() does. + * + * @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); + + /** + * Time Field Rolling function. Rolls by the given amount on the given + * time field. For example, to roll the current date up by one day, call + * roll(Calendar::DATE, +1, status). When rolling on the month or + * Calendar::MONTH field, other fields like date might conflict and, need to be + * changed. For instance, rolling the month up on the date 01/31/96 will result in + * 02/29/96. Rolling by a positive value always means rolling forward in time (unless + * the limit of the field is reached, in which case it may pin or wrap), so for + * Gregorian calendar, starting with 100 BC and rolling the year by + 1 results in 99 BC. + * When eras have a definite beginning and end (as in the Chinese calendar, or as in + * most eras in the Japanese calendar) then rolling the year past either limit of the + * era will cause the year to wrap around. When eras only have a limit at one end, + * then attempting to roll the year past that limit will result in pinning the year + * at that limit. Note that for most calendars in which era 0 years move forward in + * time (such as Buddhist, Hebrew, or Islamic), it is possible for add or roll to + * result in negative years for era 0 (that is the only way to represent years before + * the calendar epoch). + * When rolling on the hour-in-day or Calendar::HOUR_OF_DAY field, it will roll the + * hour value in the range between 0 and 23, which is zero-based. + *
+ * The only difference between roll() and add() is that roll() does not change
+ * the value of more significant fields when it reaches the minimum or maximum
+ * of its range, whereas add() does.
+ *
+ * @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 difference between the given time and the time this
+ * calendar object is set to. If this calendar is set
+ * before the given time, the returned value will be
+ * positive. If this calendar is set after the given
+ * time, the returned value will be negative. The
+ * field parameter specifies the units of the return
+ * value. For example, if fieldDifference(when,
+ * Calendar::MONTH) returns 3, then this calendar is set to
+ * 3 months before when, and possibly some addition
+ * time less than one month.
+ *
+ *
As a side effect of this call, this calendar is advanced
+ * toward when by the given amount. That is, calling
+ * this method has the side effect of calling add(field,
+ * n), where n is the return value.
+ *
+ *
Usage: To use this method, call it first with the largest + * field of interest, then with progressively smaller fields. For + * example: + * + *
+ * int y = cal->fieldDifference(when, Calendar::YEAR, err); + * int m = cal->fieldDifference(when, Calendar::MONTH, err); + * int d = cal->fieldDifference(when, Calendar::DATE, err);+ * + * computes the difference between
cal and
+ * when in years, months, and days.
+ *
+ * Note: fieldDifference() is
+ * asymmetrical. That is, in the following code:
+ *
+ *
+ * cal->setTime(date1, err); + * int m1 = cal->fieldDifference(date2, Calendar::MONTH, err); + * int d1 = cal->fieldDifference(date2, Calendar::DATE, err); + * cal->setTime(date2, err); + * int m2 = cal->fieldDifference(date1, Calendar::MONTH, err); + * int d2 = cal->fieldDifference(date1, Calendar::DATE, err);+ * + * one might expect that
m1 == -m2 && d1 == -d2.
+ * However, this is not generally the case, because of
+ * irregularities in the underlying calendar system (e.g., the
+ * Gregorian calendar has a varying number of days per month).
+ *
+ * @param when the date to compare this calendar's time to
+ * @param field the field in which to compute the result
+ * @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.
+ * @return the difference, either positive or negative, between
+ * this calendar's time and when, in terms of
+ * field.
+ * @deprecated ICU 2.6. Use fieldDifference(UDate when, UCalendarDateFields field, UErrorCode& status).
+ */
+ virtual int32_t fieldDifference(UDate when, EDateFields field, UErrorCode& status);
+
+ /**
+ * Return the difference between the given time and the time this
+ * calendar object is set to. If this calendar is set
+ * before the given time, the returned value will be
+ * positive. If this calendar is set after the given
+ * time, the returned value will be negative. The
+ * field parameter specifies the units of the return
+ * value. For example, if fieldDifference(when,
+ * Calendar::MONTH) returns 3, then this calendar is set to
+ * 3 months before when, and possibly some addition
+ * time less than one month.
+ *
+ * As a side effect of this call, this calendar is advanced
+ * toward when by the given amount. That is, calling
+ * this method has the side effect of calling add(field,
+ * n), where n is the return value.
+ *
+ *
Usage: To use this method, call it first with the largest + * field of interest, then with progressively smaller fields. For + * example: + * + *
+ * int y = cal->fieldDifference(when, Calendar::YEAR, err); + * int m = cal->fieldDifference(when, Calendar::MONTH, err); + * int d = cal->fieldDifference(when, Calendar::DATE, err);+ * + * computes the difference between
cal and
+ * when in years, months, and days.
+ *
+ * Note: fieldDifference() is
+ * asymmetrical. That is, in the following code:
+ *
+ *
+ * cal->setTime(date1, err); + * int m1 = cal->fieldDifference(date2, Calendar::MONTH, err); + * int d1 = cal->fieldDifference(date2, Calendar::DATE, err); + * cal->setTime(date2, err); + * int m2 = cal->fieldDifference(date1, Calendar::MONTH, err); + * int d2 = cal->fieldDifference(date1, Calendar::DATE, err);+ * + * one might expect that
m1 == -m2 && d1 == -d2.
+ * However, this is not generally the case, because of
+ * irregularities in the underlying calendar system (e.g., the
+ * Gregorian calendar has a varying number of days per month).
+ *
+ * @param when the date to compare this calendar's time to
+ * @param field the field in which to compute the result
+ * @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.
+ * @return the difference, either positive or negative, between
+ * this calendar's time and when, in terms of
+ * field.
+ * @stable ICU 2.6.
+ */
+ virtual int32_t fieldDifference(UDate when, UCalendarDateFields field, UErrorCode& status);
+
+ /**
+ * Sets the calendar's time zone to be the one passed in. The Calendar takes ownership
+ * of the TimeZone; the caller is no longer responsible for deleting it. If the
+ * given time zone is NULL, this function has no effect.
+ *
+ * @param value The given time zone.
+ * @stable ICU 2.0
+ */
+ void adoptTimeZone(TimeZone* value);
+
+ /**
+ * Sets the calendar's time zone to be the same as the one passed in. The TimeZone
+ * passed in is _not_ adopted; the client is still responsible for deleting it.
+ *
+ * @param zone The given time zone.
+ * @stable ICU 2.0
+ */
+ void setTimeZone(const TimeZone& zone);
+
+ /**
+ * Returns a reference to the time zone owned by this calendar. The returned reference
+ * is only valid until clients make another call to adoptTimeZone or setTimeZone,
+ * or this Calendar is destroyed.
+ *
+ * @return The time zone object associated with this calendar.
+ * @stable ICU 2.0
+ */
+ const TimeZone& getTimeZone(void) const;
+
+ /**
+ * Returns the time zone owned by this calendar. The caller owns the returned object
+ * and must delete it when done. After this call, the new time zone associated
+ * with this Calendar is the default TimeZone as returned by TimeZone::createDefault().
+ *
+ * @return The time zone object which was associated with this calendar.
+ * @stable ICU 2.0
+ */
+ TimeZone* orphanTimeZone(void);
+
+ /**
+ * Queries if the current date for this Calendar is in Daylight Savings Time.
+ *
+ * @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 = 0;
+
+ /**
+ * Specifies whether or not date/time interpretation is to be lenient. With lenient
+ * interpretation, a date such as "February 942, 1996" will be treated as being
+ * equivalent to the 941st day after February 1, 1996. With strict interpretation,
+ * such dates will cause an error when computing time from the time field values
+ * representing the dates.
+ *
+ * @param lenient True specifies date/time interpretation to be lenient.
+ *
+ * @see DateFormat#setLenient
+ * @stable ICU 2.0
+ */
+ void setLenient(UBool lenient);
+
+ /**
+ * Tells whether date/time interpretation is to be lenient.
+ *
+ * @return True tells that date/time interpretation is to be lenient.
+ * @stable ICU 2.0
+ */
+ UBool isLenient(void) const;
+
+ /**
+ * Sets the behavior for handling wall time repeating multiple times
+ * at negative time zone offset transitions. For example, 1:30 AM on
+ * November 6, 2011 in US Eastern time (Ameirca/New_York) occurs twice;
+ * 1:30 AM EDT, then 1:30 AM EST one hour later. When UCAL_WALLTIME_FIRST
+ * is used, the wall time 1:30AM in this example will be interpreted as 1:30 AM EDT
+ * (first occurrence). When UCAL_WALLTIME_LAST is used, it will be
+ * interpreted as 1:30 AM EST (last occurrence). The default value is
+ * UCAL_WALLTIME_LAST.
+ *
+ * Note:When UCAL_WALLTIME_NEXT_VALID is not a valid
+ * option for this. When the argument is neither UCAL_WALLTIME_FIRST
+ * nor UCAL_WALLTIME_LAST, this method has no effect and will keep
+ * the current setting.
+ *
+ * @param option the behavior for handling repeating wall time, either
+ * UCAL_WALLTIME_FIRST or UCAL_WALLTIME_LAST.
+ * @see #getRepeatedWallTimeOption
+ * @stable ICU 49
+ */
+ void setRepeatedWallTimeOption(UCalendarWallTimeOption option);
+
+ /**
+ * Gets the behavior for handling wall time repeating multiple times
+ * at negative time zone offset transitions.
+ *
+ * @return the behavior for handling repeating wall time, either
+ * UCAL_WALLTIME_FIRST or UCAL_WALLTIME_LAST.
+ * @see #setRepeatedWallTimeOption
+ * @stable ICU 49
+ */
+ UCalendarWallTimeOption getRepeatedWallTimeOption(void) const;
+
+ /**
+ * Sets the behavior for handling skipped wall time at positive time zone offset
+ * transitions. For example, 2:30 AM on March 13, 2011 in US Eastern time (America/New_York)
+ * does not exist because the wall time jump from 1:59 AM EST to 3:00 AM EDT. When
+ * UCAL_WALLTIME_FIRST is used, 2:30 AM is interpreted as 30 minutes before 3:00 AM
+ * EDT, therefore, it will be resolved as 1:30 AM EST. When UCAL_WALLTIME_LAST
+ * is used, 2:30 AM is interpreted as 31 minutes after 1:59 AM EST, therefore, it will be
+ * resolved as 3:30 AM EDT. When UCAL_WALLTIME_NEXT_VALID is used, 2:30 AM will
+ * be resolved as next valid wall time, that is 3:00 AM EDT. The default value is
+ * UCAL_WALLTIME_LAST.
+ *
+ * Note:This option is effective only when this calendar is lenient.
+ * When the calendar is strict, such non-existing wall time will cause an error.
+ *
+ * @param option the behavior for handling skipped wall time at positive time zone
+ * offset transitions, one of UCAL_WALLTIME_FIRST, UCAL_WALLTIME_LAST and
+ * UCAL_WALLTIME_NEXT_VALID.
+ * @see #getSkippedWallTimeOption
+ *
+ * @stable ICU 49
+ */
+ void setSkippedWallTimeOption(UCalendarWallTimeOption option);
+
+ /**
+ * Gets the behavior for handling skipped wall time at positive time zone offset
+ * transitions.
+ *
+ * @return the behavior for handling skipped wall time, one of
+ * UCAL_WALLTIME_FIRST, UCAL_WALLTIME_LAST
+ * and UCAL_WALLTIME_NEXT_VALID.
+ * @see #setSkippedWallTimeOption
+ * @stable ICU 49
+ */
+ UCalendarWallTimeOption getSkippedWallTimeOption(void) const;
+
+#ifndef U_HIDE_DEPRECATED_API
+ /**
+ * Sets what the first day of the week is; e.g., Sunday in US, Monday in France.
+ *
+ * @param value The given first day of the week.
+ * @deprecated ICU 2.6. Use setFirstDayOfWeek(UCalendarDaysOfWeek value) instead.
+ */
+ void setFirstDayOfWeek(EDaysOfWeek value);
+#endif /* U_HIDE_DEPRECATED_API */
+
+ /**
+ * Sets what the first day of the week is; e.g., Sunday in US, Monday in France.
+ *
+ * @param value The given first day of the week.
+ * @stable ICU 2.6.
+ */
+ void setFirstDayOfWeek(UCalendarDaysOfWeek value);
+
+#ifndef U_HIDE_DEPRECATED_API
+ /**
+ * Gets what the first day of the week is; e.g., Sunday in US, Monday in France.
+ *
+ * @return The first day of the week.
+ * @deprecated ICU 2.6 use the overload with error code
+ */
+ EDaysOfWeek getFirstDayOfWeek(void) const;
+#endif /* U_HIDE_DEPRECATED_API */
+
+ /**
+ * Gets what the first day of the week is; e.g., Sunday in US, Monday in France.
+ *
+ * @param status error code
+ * @return The first day of the week.
+ * @stable ICU 2.6
+ */
+ UCalendarDaysOfWeek getFirstDayOfWeek(UErrorCode &status) const;
+
+ /**
+ * Sets what the minimal days required in the first week of the year are; For
+ * example, if the first week is defined as one that contains the first day of the
+ * first month of a year, call the method with value 1. If it must be a full week,
+ * use value 7.
+ *
+ * @param value The given minimal days required in the first week of the year.
+ * @stable ICU 2.0
+ */
+ void setMinimalDaysInFirstWeek(uint8_t value);
+
+ /**
+ * Gets what the minimal days required in the first week of the year are; e.g., if
+ * the first week is defined as one that contains the first day of the first month
+ * of a year, getMinimalDaysInFirstWeek returns 1. If the minimal days required must
+ * be a full week, getMinimalDaysInFirstWeek returns 7.
+ *
+ * @return The minimal days required in the first week of the year.
+ * @stable ICU 2.0
+ */
+ uint8_t getMinimalDaysInFirstWeek(void) const;
+
+ /**
+ * Gets the minimum value for the given time field. e.g., for Gregorian
+ * DAY_OF_MONTH, 1.
+ *
+ * @param field The given time field.
+ * @return The minimum value for the given time field.
+ * @deprecated ICU 2.6. Use getMinimum(UCalendarDateFields field) instead.
+ */
+ virtual int32_t getMinimum(EDateFields field) const;
+
+ /**
+ * Gets the minimum value for the given time field. e.g., for Gregorian
+ * DAY_OF_MONTH, 1.
+ *
+ * @param field The given time field.
+ * @return The minimum value for the given time field.
+ * @stable ICU 2.6.
+ */
+ virtual int32_t getMinimum(UCalendarDateFields field) const;
+
+ /**
+ * Gets the maximum value for the given time field. e.g. for Gregorian DAY_OF_MONTH,
+ * 31.
+ *
+ * @param field The given time field.
+ * @return The maximum value for the given time field.
+ * @deprecated ICU 2.6. Use getMaximum(UCalendarDateFields field) instead.
+ */
+ virtual int32_t getMaximum(EDateFields field) const;
+
+ /**
+ * Gets the maximum value for the given time field. e.g. for Gregorian DAY_OF_MONTH,
+ * 31.
+ *
+ * @param field The given time field.
+ * @return The maximum value for the given time field.
+ * @stable ICU 2.6.
+ */
+ virtual int32_t getMaximum(UCalendarDateFields field) const;
+
+ /**
+ * Gets the highest minimum value for the given field if varies. Otherwise same as
+ * getMinimum(). For Gregorian, no difference.
+ *
+ * @param field The given time field.
+ * @return The highest minimum value for the given time field.
+ * @deprecated ICU 2.6. Use getGreatestMinimum(UCalendarDateFields field) instead.
+ */
+ virtual int32_t getGreatestMinimum(EDateFields field) const;
+
+ /**
+ * Gets the highest minimum value for the given field if varies. Otherwise same as
+ * getMinimum(). For Gregorian, no difference.
+ *
+ * @param field The given time field.
+ * @return The highest minimum value for the given time field.
+ * @stable ICU 2.6.
+ */
+ virtual int32_t getGreatestMinimum(UCalendarDateFields field) const;
+
+ /**
+ * Gets the lowest maximum value for the given field if varies. Otherwise same as
+ * getMaximum(). e.g., for Gregorian DAY_OF_MONTH, 28.
+ *
+ * @param field The given time field.
+ * @return The lowest maximum value for the given time field.
+ * @deprecated ICU 2.6. Use getLeastMaximum(UCalendarDateFields field) instead.
+ */
+ virtual int32_t getLeastMaximum(EDateFields field) const;
+
+ /**
+ * Gets the lowest maximum value for the given field if varies. Otherwise same as
+ * getMaximum(). e.g., for Gregorian DAY_OF_MONTH, 28.
+ *
+ * @param field The given time field.
+ * @return The lowest maximum value for the given time field.
+ * @stable ICU 2.6.
+ */
+ virtual int32_t getLeastMaximum(UCalendarDateFields field) const;
+
+#ifndef U_HIDE_DEPRECATED_API
+ /**
+ * 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().
+ *
+ * The version of this function on Calendar uses an iterative algorithm to determine the
+ * actual minimum value for the field. There is almost always a more efficient way to
+ * accomplish this (in most cases, you can simply return getMinimum()). GregorianCalendar
+ * overrides this function with a more efficient implementation.
+ *
+ * @param field the field to determine the minimum of
+ * @param status Fill-in parameter which receives the status of this operation.
+ * @return the minimum of the given field for the current date of this Calendar
+ * @deprecated ICU 2.6. Use getActualMinimum(UCalendarDateFields field, UErrorCode& status) instead.
+ */
+ int32_t getActualMinimum(EDateFields field, UErrorCode& status) const;
+#endif /* U_HIDE_DEPRECATED_API */
+
+ /**
+ * 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().
+ *
+ * The version of this function on Calendar uses an iterative algorithm to determine the
+ * actual minimum value for the field. There is almost always a more efficient way to
+ * accomplish this (in most cases, you can simply return getMinimum()). GregorianCalendar
+ * overrides this function with a more efficient implementation.
+ *
+ * @param field the field to determine the minimum of
+ * @param status Fill-in parameter which receives the status of this operation.
+ * @return the minimum of the given field for the current date of this Calendar
+ * @stable ICU 2.6.
+ */
+ virtual int32_t getActualMinimum(UCalendarDateFields field, UErrorCode& status) const;
+
+#ifndef U_HIDE_DEPRECATED_API
+ /**
+ * 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.
+ *
+ * The version of this function on Calendar uses an iterative algorithm to determine the
+ * actual maximum value for the field. There is almost always a more efficient way to
+ * accomplish this (in most cases, you can simply return getMaximum()). GregorianCalendar
+ * overrides this function with a more efficient implementation.
+ *
+ * @param field the field to determine the maximum of
+ * @param status Fill-in parameter which receives the status of this operation.
+ * @return the maximum of the given field for the current date of this Calendar
+ * @deprecated ICU 2.6. Use getActualMaximum(UCalendarDateFields field, UErrorCode& status) instead.
+ */
+ int32_t getActualMaximum(EDateFields field, UErrorCode& status) const;
+#endif /* U_HIDE_DEPRECATED_API */
+
+ /**
+ * 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.
+ *
+ * The version of this function on Calendar uses an iterative algorithm to determine the
+ * actual maximum value for the field. There is almost always a more efficient way to
+ * accomplish this (in most cases, you can simply return getMaximum()). GregorianCalendar
+ * overrides this function with a more efficient implementation.
+ *
+ * @param field the field to determine the maximum of
+ * @param status Fill-in parameter which receives the status of this operation.
+ * @return the maximum of the given field for the current date of this Calendar
+ * @stable ICU 2.6.
+ */
+ virtual int32_t getActualMaximum(UCalendarDateFields field, UErrorCode& status) const;
+
+#ifndef U_HIDE_DEPRECATED_API
+ /**
+ * Gets the value for a given time field. Recalculate the current time field values
+ * if the time value has been changed by a call to setTime(). Return zero for unset
+ * fields if any fields have been explicitly set by a call to set(). To force a
+ * recomputation of all fields regardless of the previous state, call complete().
+ * This method is semantically const, but may alter the object in memory.
+ *
+ * @param field The given time field.
+ * @param status Fill-in parameter which receives the status of the operation.
+ * @return The value for the given time field, or zero if the field is unset,
+ * and set() has been called for any other field.
+ * @deprecated ICU 2.6. Use get(UCalendarDateFields field, UErrorCode& status) instead.
+ */
+ int32_t get(EDateFields field, UErrorCode& status) const;
+#endif /* U_HIDE_DEPRECATED_API */
+
+ /**
+ * Gets the value for a given time field. Recalculate the current time field values
+ * if the time value has been changed by a call to setTime(). Return zero for unset
+ * fields if any fields have been explicitly set by a call to set(). To force a
+ * recomputation of all fields regardless of the previous state, call complete().
+ * This method is semantically const, but may alter the object in memory.
+ *
+ * @param field The given time field.
+ * @param status Fill-in parameter which receives the status of the operation.
+ * @return The value for the given time field, or zero if the field is unset,
+ * and set() has been called for any other field.
+ * @stable ICU 2.6.
+ */
+ int32_t get(UCalendarDateFields field, UErrorCode& status) const;
+
+#ifndef U_HIDE_DEPRECATED_API
+ /**
+ * Determines if the given time field has a value set. This can affect in the
+ * resolving of time in Calendar. Unset fields have a value of zero, by definition.
+ *
+ * @param field The given time field.
+ * @return True if the given time field has a value set; false otherwise.
+ * @deprecated ICU 2.6. Use isSet(UCalendarDateFields field) instead.
+ */
+ UBool isSet(EDateFields field) const;
+#endif /* U_HIDE_DEPRECATED_API */
+
+ /**
+ * Determines if the given time field has a value set. This can affect in the
+ * resolving of time in Calendar. Unset fields have a value of zero, by definition.
+ *
+ * @param field The given time field.
+ * @return True if the given time field has a value set; false otherwise.
+ * @stable ICU 2.6.
+ */
+ UBool isSet(UCalendarDateFields field) const;
+
+#ifndef U_HIDE_DEPRECATED_API
+ /**
+ * Sets the given time field with the given value.
+ *
+ * @param field The given time field.
+ * @param value The value to be set for the given time field.
+ * @deprecated ICU 2.6. Use set(UCalendarDateFields field, int32_t value) instead.
+ */
+ void set(EDateFields field, int32_t value);
+#endif /* U_HIDE_DEPRECATED_API */
+
+ /**
+ * Sets the given time field with the given value.
+ *
+ * @param field The given time field.
+ * @param value The value to be set for the given time field.
+ * @stable ICU 2.6.
+ */
+ void set(UCalendarDateFields field, int32_t value);
+
+ /**
+ * Sets the values for the fields YEAR, MONTH, and DATE. Other field values are
+ * retained; call clear() first if this is not desired.
+ *
+ * @param year The value used to set the YEAR time field.
+ * @param month The value used to set the MONTH time field. Month value is 0-based.
+ * e.g., 0 for January.
+ * @param date The value used to set the DATE time field.
+ * @stable ICU 2.0
+ */
+ void set(int32_t year, int32_t month, int32_t date);
+
+ /**
+ * Sets the values for the fields YEAR, MONTH, DATE, HOUR_OF_DAY, and MINUTE. Other
+ * field values are retained; call clear() first if this is not desired.
+ *
+ * @param year The value used to set the YEAR time field.
+ * @param month The value used to set the MONTH time field. Month value is
+ * 0-based. E.g., 0 for January.
+ * @param date The value used to set the DATE time field.
+ * @param hour The value used to set the HOUR_OF_DAY time field.
+ * @param minute The value used to set the MINUTE time field.
+ * @stable ICU 2.0
+ */
+ void set(int32_t year, int32_t month, int32_t date, int32_t hour, int32_t minute);
+
+ /**
+ * Sets the values for the fields YEAR, MONTH, DATE, HOUR_OF_DAY, MINUTE, and SECOND.
+ * Other field values are retained; call clear() first if this is not desired.
+ *
+ * @param year The value used to set the YEAR time field.
+ * @param month The value used to set the MONTH time field. Month value is
+ * 0-based. E.g., 0 for January.
+ * @param date The value used to set the DATE time field.
+ * @param hour The value used to set the HOUR_OF_DAY time field.
+ * @param minute The value used to set the MINUTE time field.
+ * @param second The value used to set the SECOND time field.
+ * @stable ICU 2.0
+ */
+ void set(int32_t year, int32_t month, int32_t date, int32_t hour, int32_t minute, int32_t second);
+
+ /**
+ * Clears the values of all the time fields, making them both unset and assigning
+ * them a value of zero. The field values will be determined during the next
+ * resolving of time into time fields.
+ * @stable ICU 2.0
+ */
+ void clear(void);
+
+#ifndef U_HIDE_DEPRECATED_API
+ /**
+ * Clears the value in the given time field, both making it unset and assigning it a
+ * value of zero. This field value will be determined during the next resolving of
+ * time into time fields.
+ *
+ * @param field The time field to be cleared.
+ * @deprecated ICU 2.6. Use clear(UCalendarDateFields field) instead.
+ */
+ void clear(EDateFields field);
+#endif /* U_HIDE_DEPRECATED_API */
+
+ /**
+ * Clears the value in the given time field, both making it unset and assigning it a
+ * value of zero. This field value will be determined during the next resolving of
+ * time into time fields.
+ *
+ * @param field The time field to be cleared.
+ * @stable ICU 2.6.
+ */
+ void clear(UCalendarDateFields field);
+
+ /**
+ * Returns a unique class ID POLYMORPHICALLY. Pure virtual method. 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.
+ *
+ * Concrete subclasses of Calendar must implement getDynamicClassID() and also a + * static method and data member: + * + * static UClassID getStaticClassID() { return (UClassID)&fgClassID; } + * static char fgClassID; + * + * @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 = 0; + + /** + * Returns the calendar type name string for this Calendar object. + * The returned string is the legacy ICU calendar attribute value, + * for example, "gregorian" or "japanese". + * + * See type="old type name" for the calendar attribute of locale IDs + * at http://www.unicode.org/reports/tr35/#Key_Type_Definitions + * + * Sample code for getting the LDML/BCP 47 calendar key value: + * \code + * const char *calType = cal->getType(); + * if (0 == strcmp(calType, "unknown")) { + * // deal with unknown calendar type + * } else { + * string localeID("root@calendar="); + * localeID.append(calType); + * char langTag[100]; + * UErrorCode errorCode = U_ZERO_ERROR; + * int32_t length = uloc_toLanguageTag(localeID.c_str(), langTag, (int32_t)sizeof(langTag), TRUE, &errorCode); + * if (U_FAILURE(errorCode)) { + * // deal with errors & overflow + * } + * string lang(langTag, length); + * size_t caPos = lang.find("-ca-"); + * lang.erase(0, caPos + 4); + * // lang now contains the LDML calendar type + * } + * \endcode + * + * @return legacy calendar type name string + * @stable ICU 49 + */ + virtual const char * getType() const = 0; + + /** + * Returns whether the given day of the week is a weekday, a weekend day, + * or a day that transitions from one to the other, for the locale and + * calendar system associated with this Calendar (the locale's region is + * often the most determinant factor). If a transition occurs at midnight, + * then the days before and after the transition will have the + * type UCAL_WEEKDAY or UCAL_WEEKEND. If a transition occurs at a time + * other than midnight, then the day of the transition will have + * the type UCAL_WEEKEND_ONSET or UCAL_WEEKEND_CEASE. In this case, the + * method getWeekendTransition() will return the point of + * transition. + * @param dayOfWeek The day of the week whose type is desired (UCAL_SUNDAY..UCAL_SATURDAY). + * @param status The error code for the operation. + * @return The UCalendarWeekdayType for the day of the week. + * @stable ICU 4.4 + */ + virtual UCalendarWeekdayType getDayOfWeekType(UCalendarDaysOfWeek dayOfWeek, UErrorCode &status) const; + + /** + * Returns the time during the day at which the weekend begins or ends in + * this calendar system. If getDayOfWeekType() returns UCAL_WEEKEND_ONSET + * for the specified dayOfWeek, return the time at which the weekend begins. + * If getDayOfWeekType() returns UCAL_WEEKEND_CEASE for the specified dayOfWeek, + * return the time at which the weekend ends. If getDayOfWeekType() returns + * some other UCalendarWeekdayType for the specified dayOfWeek, is it an error condition + * (U_ILLEGAL_ARGUMENT_ERROR). + * @param dayOfWeek The day of the week for which the weekend transition time is + * desired (UCAL_SUNDAY..UCAL_SATURDAY). + * @param status The error code for the operation. + * @return The milliseconds after midnight at which the weekend begins or ends. + * @stable ICU 4.4 + */ + virtual int32_t getWeekendTransition(UCalendarDaysOfWeek dayOfWeek, UErrorCode &status) const; + + /** + * Returns TRUE if the given UDate is in the weekend in + * this calendar system. + * @param date The UDate in question. + * @param status The error code for the operation. + * @return TRUE if the given UDate is in the weekend in + * this calendar system, FALSE otherwise. + * @stable ICU 4.4 + */ + virtual UBool isWeekend(UDate date, UErrorCode &status) const; + + /** + * Returns TRUE if this Calendar's current date-time is in the weekend in + * this calendar system. + * @return TRUE if this Calendar's current date-time is in the weekend in + * this calendar system, FALSE otherwise. + * @stable ICU 4.4 + */ + virtual UBool isWeekend(void) const; + +protected: + + /** + * Constructs a Calendar with the default time zone as returned by + * TimeZone::createInstance(), and the default locale. + * + * @param success Indicates the status of Calendar object construction. Returns + * U_ZERO_ERROR if constructed successfully. + * @stable ICU 2.0 + */ + Calendar(UErrorCode& success); + + /** + * Copy constructor + * + * @param source Calendar object to be copied from + * @stable ICU 2.0 + */ + Calendar(const Calendar& source); + + /** + * Default assignment operator + * + * @param right Calendar object to be copied + * @stable ICU 2.0 + */ + Calendar& operator=(const Calendar& right); + + /** + * Constructs a Calendar with the given time zone and locale. Clients are no longer + * responsible for deleting the given time zone object after it's adopted. + * + * @param zone The given time zone. + * @param aLocale The given locale. + * @param success Indicates the status of Calendar object construction. Returns + * U_ZERO_ERROR if constructed successfully. + * @stable ICU 2.0 + */ + Calendar(TimeZone* zone, const Locale& aLocale, UErrorCode& success); + + /** + * Constructs a Calendar with the given time zone and locale. + * + * @param zone The given time zone. + * @param aLocale The given locale. + * @param success Indicates the status of Calendar object construction. Returns + * U_ZERO_ERROR if constructed successfully. + * @stable ICU 2.0 + */ + Calendar(const TimeZone& zone, const Locale& aLocale, UErrorCode& success); + + /** + * Converts Calendar's time field values to GMT as milliseconds. + * + * @param status Output param set to success/failure code on exit. If any value + * previously set in the time field is invalid or restricted by + * leniency, this will be set to an error status. + * @stable ICU 2.0 + */ + virtual void computeTime(UErrorCode& status); + + /** + * Converts GMT as milliseconds to time field values. This allows you to sync up the + * time field values with a new time that is set for the calendar. This method + * does NOT recompute the time first; to recompute the time, then the fields, use + * the method complete(). + * + * @param status Output param set to success/failure code on exit. If any value + * previously set in the time field is invalid or restricted by + * leniency, this will be set to an error status. + * @stable ICU 2.0 + */ + virtual void computeFields(UErrorCode& status); + + /** + * Gets this Calendar's current time as a long. + * + * @param status Output param set to success/failure code on exit. If any value + * previously set in the time field is invalid or restricted by + * leniency, this will be set to an error status. + * @return the current time as UTC milliseconds from the epoch. + * @stable ICU 2.0 + */ + double getTimeInMillis(UErrorCode& status) const; + + /** + * Sets this Calendar's current time from the given long value. + * @param millis the new time in UTC milliseconds from the epoch. + * @param status Output param set to success/failure code on exit. If any value + * previously set in the time field is invalid or restricted by + * leniency, this will be set to an error status. + * @stable ICU 2.0 + */ + void setTimeInMillis( double millis, UErrorCode& status ); + + /** + * Recomputes the current time from currently set fields, and then fills in any + * unset fields in the time field list. + * + * @param status Output param set to success/failure code on exit. If any value + * previously set in the time field is invalid or restricted by + * leniency, this will be set to an error status. + * @stable ICU 2.0 + */ + void complete(UErrorCode& status); + +#ifndef U_HIDE_DEPRECATED_API + /** + * Gets the value for a given time field. Subclasses can use this function to get + * field values without forcing recomputation of time. + * + * @param field The given time field. + * @return The value for the given time field. + * @deprecated ICU 2.6. Use internalGet(UCalendarDateFields field) instead. + */ + inline int32_t internalGet(EDateFields field) const {return fFields[field];} +#endif /* U_HIDE_DEPRECATED_API */ + +#ifndef U_HIDE_INTERNAL_API + /** + * Gets the value for a given time field. Subclasses can use this function to get + * field values without forcing recomputation of time. If the field's stamp is UNSET, + * the defaultValue is used. + * + * @param field The given time field. + * @param defaultValue a default value used if the field is unset. + * @return The value for the given time field. + * @internal + */ + inline int32_t internalGet(UCalendarDateFields field, int32_t defaultValue) const {return fStamp[field]>kUnset ? fFields[field] : defaultValue;} + + /** + * Gets the value for a given time field. Subclasses can use this function to get + * field values without forcing recomputation of time. + * + * @param field The given time field. + * @return The value for the given time field. + * @internal + */ + inline int32_t internalGet(UCalendarDateFields field) const {return fFields[field];} +#endif /* U_HIDE_INTERNAL_API */ + +#ifndef U_HIDE_DEPRECATED_API + /** + * Sets the value for a given time field. This is a fast internal method for + * subclasses. It does not affect the areFieldsInSync, isTimeSet, or areAllFieldsSet + * flags. + * + * @param field The given time field. + * @param value The value for the given time field. + * @deprecated ICU 2.6. Use internalSet(UCalendarDateFields field, int32_t value) instead. + */ + void internalSet(EDateFields field, int32_t value); +#endif /* U_HIDE_DEPRECATED_API */ + + /** + * Sets the value for a given time field. This is a fast internal method for + * subclasses. It does not affect the areFieldsInSync, isTimeSet, or areAllFieldsSet + * flags. + * + * @param field The given time field. + * @param value The value for the given time field. + * @stable ICU 2.6. + */ + inline void internalSet(UCalendarDateFields field, int32_t value); + + /** + * Prepare this calendar for computing the actual minimum or maximum. + * This method modifies this calendar's fields; it is called on a + * temporary calendar. + * @internal + */ + virtual void prepareGetActual(UCalendarDateFields field, UBool isMinimum, UErrorCode &status); + + /** + * Limit enums. Not in sync with UCalendarLimitType (refers to internal fields). + * @internal + */ + enum ELimitType { +#ifndef U_HIDE_INTERNAL_API + UCAL_LIMIT_MINIMUM = 0, + UCAL_LIMIT_GREATEST_MINIMUM, + UCAL_LIMIT_LEAST_MAXIMUM, + UCAL_LIMIT_MAXIMUM, + UCAL_LIMIT_COUNT +#endif /* U_HIDE_INTERNAL_API */ + }; + + /** + * Subclass API for defining limits of different types. + * Subclasses must implement this method to return limits for the + * following fields: + * + *
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+ * + * @param field one of the above field numbers + * @param limitType one of
MINIMUM, GREATEST_MINIMUM,
+ * LEAST_MAXIMUM, or MAXIMUM
+ * @internal
+ */
+ virtual int32_t handleGetLimit(UCalendarDateFields field, ELimitType limitType) const = 0;
+
+ /**
+ * Return a limit for a field.
+ * @param field the field, from 0..UCAL_MAX_FIELD
+ * @param limitType the type specifier for the limit
+ * @see #ELimitType
+ * @internal
+ */
+ virtual int32_t getLimit(UCalendarDateFields field, ELimitType limitType) 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 = 0;
+
+ /**
+ * 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 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() = 0;
+
+ /**
+ * 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);
+
+ /**
+ * Subclasses must 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 Calendar implementation assumes yearWoy is in extended gregorian form
+ * @return the extended year, UCAL_EXTENDED_YEAR
+ * @internal
+ */
+ virtual int32_t handleGetExtendedYearFromWeekFields(int32_t yearWoy, int32_t woy);
+
+#ifndef U_HIDE_INTERNAL_API
+ /**
+ * Compute the Julian day from fields. Will determine whether to use
+ * the JULIAN_DAY field directly, or other fields.
+ * @return the julian day
+ * @internal
+ */
+ int32_t computeJulianDay();
+
+ /**
+ * Compute the milliseconds in the day from the fields. This is a
+ * value from 0 to 23:59:59.999 inclusive, unless fields are out of
+ * range, in which case it can be an arbitrary value. This value
+ * reflects local zone wall time.
+ * @internal
+ */
+ int32_t computeMillisInDay();
+
+ /**
+ * This method can assume EXTENDED_YEAR has been set.
+ * @param millis milliseconds of the date fields
+ * @param millisInDay milliseconds of the time fields; may be out
+ * or range.
+ * @param ec Output param set to failure code on function return
+ * when this function fails.
+ * @internal
+ */
+ int32_t computeZoneOffset(double millis, int32_t millisInDay, UErrorCode &ec);
+
+
+ /**
+ * Determine the best stamp in a range.
+ * @param start first enum to look at
+ * @param end last enum to look at
+ * @param bestSoFar stamp prior to function call
+ * @return the stamp value of the best stamp
+ * @internal
+ */
+ int32_t newestStamp(UCalendarDateFields start, UCalendarDateFields end, int32_t bestSoFar) const;
+
+ /**
+ * Values for field resolution tables
+ * @see #resolveFields
+ * @internal
+ */
+ enum {
+ /** Marker for end of resolve set (row or group). */
+ kResolveSTOP = -1,
+ /** Value to be bitwised "ORed" against resolve table field values for remapping. Example: (UCAL_DATE | kResolveRemap) in 1st column will cause 'UCAL_DATE' to be returned, but will not examine the value of UCAL_DATE. */
+ kResolveRemap = 32
+ };
+
+ /**
+ * Precedence table for Dates
+ * @see #resolveFields
+ * @internal
+ */
+ static const UFieldResolutionTable kDatePrecedence[];
+
+ /**
+ * Precedence table for Year
+ * @see #resolveFields
+ * @internal
+ */
+ static const UFieldResolutionTable kYearPrecedence[];
+
+ /**
+ * Precedence table for Day of Week
+ * @see #resolveFields
+ * @internal
+ */
+ static const UFieldResolutionTable kDOWPrecedence[];
+
+ /**
+ * Given a precedence table, return the newest field combination in
+ * the table, or UCAL_FIELD_COUNT if none is found.
+ *
+ * The precedence table is a 3-dimensional array of integers. It + * may be thought of as an array of groups. Each group is an array of + * lines. Each line is an array of field numbers. Within a line, if + * all fields are set, then the time stamp of the line is taken to be + * the stamp of the most recently set field. If any field of a line is + * unset, then the line fails to match. Within a group, the line with + * the newest time stamp is selected. The first field of the line is + * returned to indicate which line matched. + * + *
In some cases, it may be desirable to map a line to field that
+ * whose stamp is NOT examined. For example, if the best field is
+ * DAY_OF_WEEK then the DAY_OF_WEEK_IN_MONTH algorithm may be used. In
+ * order to do this, insert the value kResolveRemap | F at
+ * the start of the line, where F is the desired return
+ * field value. This field will NOT be examined; it only determines
+ * the return value if the other fields in the line are the newest.
+ *
+ *
If all lines of a group contain at least one unset field, then no + * line will match, and the group as a whole will fail to match. In + * that case, the next group will be processed. If all groups fail to + * match, then UCAL_FIELD_COUNT is returned. + * @internal + */ + UCalendarDateFields resolveFields(const UFieldResolutionTable *precedenceTable); +#endif /* U_HIDE_INTERNAL_API */ + + + /** + * @internal + */ + virtual const UFieldResolutionTable* getFieldResolutionTable() const; + +#ifndef U_HIDE_INTERNAL_API + /** + * Return the field that is newer, either defaultField, or + * alternateField. If neither is newer or neither is set, return defaultField. + * @internal + */ + UCalendarDateFields newerField(UCalendarDateFields defaultField, UCalendarDateFields alternateField) const; +#endif /* U_HIDE_INTERNAL_API */ + + +private: + /** + * Helper function for calculating limits by trial and error + * @param field The field being investigated + * @param startValue starting (least max) value of field + * @param endValue ending (greatest max) value of field + * @param status return type + * @internal + */ + int32_t getActualHelper(UCalendarDateFields field, int32_t startValue, int32_t endValue, UErrorCode &status) const; + + +protected: + /** + * The flag which indicates if the current time is set in the calendar. + * @stable ICU 2.0 + */ + UBool fIsTimeSet; + + /** + * True if the fields are in sync with the currently set time of this Calendar. + * If false, then the next attempt to get the value of a field will + * force a recomputation of all fields from the current value of the time + * field. + *
+ * This should really be named areFieldsInSync, but the old name is retained + * for backward compatibility. + * @stable ICU 2.0 + */ + UBool fAreFieldsSet; + + /** + * True if all of the fields have been set. This is initially false, and set to + * true by computeFields(). + * @stable ICU 2.0 + */ + UBool fAreAllFieldsSet; + + /** + * True if all fields have been virtually set, but have not yet been + * computed. This occurs only in setTimeInMillis(). A calendar set + * to this state will compute all fields from the time if it becomes + * necessary, but otherwise will delay such computation. + * @stable ICU 3.0 + */ + UBool fAreFieldsVirtuallySet; + + /** + * Get the current time without recomputing. + * + * @return the current time without recomputing. + * @stable ICU 2.0 + */ + UDate internalGetTime(void) const { return fTime; } + + /** + * Set the current time without affecting flags or fields. + * + * @param time The time to be set + * @return the current time without recomputing. + * @stable ICU 2.0 + */ + void internalSetTime(UDate time) { fTime = time; } + + /** + * The time fields containing values into which the millis is computed. + * @stable ICU 2.0 + */ + int32_t fFields[UCAL_FIELD_COUNT]; + + /** + * The flags which tell if a specified time field for the calendar is set. + * @deprecated ICU 2.8 use (fStamp[n]!=kUnset) + */ + UBool fIsSet[UCAL_FIELD_COUNT]; + + /** Special values of stamp[] + * @stable ICU 2.0 + */ + enum { + kUnset = 0, + kInternallySet, + kMinimumUserStamp + }; + + /** + * Pseudo-time-stamps which specify when each field was set. There + * are two special values, UNSET and INTERNALLY_SET. Values from + * MINIMUM_USER_SET to Integer.MAX_VALUE are legal user set values. + * @stable ICU 2.0 + */ + int32_t fStamp[UCAL_FIELD_COUNT]; + + /** + * Subclasses may override this method to compute several fields + * specific to each calendar system. These are: + * + *
In addition, subclasses should compute any subclass-specific + * fields, that is, fields from BASE_FIELD_COUNT to + * getFieldCount() - 1. + * + *
The default implementation in Calendar implements
+ * a pure proleptic Gregorian calendar.
+ * @internal
+ */
+ virtual void handleComputeFields(int32_t julianDay, UErrorCode &status);
+
+#ifndef U_HIDE_INTERNAL_API
+ /**
+ * Return the extended year on the Gregorian calendar as computed by
+ * computeGregorianFields().
+ * @internal
+ */
+ int32_t getGregorianYear() const {
+ return fGregorianYear;
+ }
+
+ /**
+ * Return the month (0-based) on the Gregorian calendar as computed by
+ * computeGregorianFields().
+ * @internal
+ */
+ int32_t getGregorianMonth() const {
+ return fGregorianMonth;
+ }
+
+ /**
+ * Return the day of year (1-based) on the Gregorian calendar as
+ * computed by computeGregorianFields().
+ * @internal
+ */
+ int32_t getGregorianDayOfYear() const {
+ return fGregorianDayOfYear;
+ }
+
+ /**
+ * Return the day of month (1-based) on the Gregorian calendar as
+ * computed by computeGregorianFields().
+ * @internal
+ */
+ int32_t getGregorianDayOfMonth() const {
+ return fGregorianDayOfMonth;
+ }
+#endif /* U_HIDE_INTERNAL_API */
+
+ /**
+ * Called by computeJulianDay. Returns the default month (0-based) for the year,
+ * taking year and era into account. Defaults to 0 for Gregorian, which doesn't care.
+ * @param eyear The extended year
+ * @internal
+ */
+ virtual int32_t getDefaultMonthInYear(int32_t eyear) ;
+
+
+ /**
+ * Called by computeJulianDay. Returns the default day (1-based) for the month,
+ * taking currently-set year and era into account. Defaults to 1 for Gregorian.
+ * @param eyear the extended year
+ * @param month the month in the year
+ * @internal
+ */
+ virtual int32_t getDefaultDayInMonth(int32_t eyear, int32_t month);
+
+ //-------------------------------------------------------------------------
+ // Protected utility methods for use by subclasses. These are very handy
+ // for implementing add, roll, and computeFields.
+ //-------------------------------------------------------------------------
+
+ /**
+ * Adjust the specified field so that it is within
+ * the allowable range for the date to which this calendar is set.
+ * For example, in a Gregorian calendar pinning the {@link #UCalendarDateFields DAY_OF_MONTH}
+ * field for a calendar set to April 31 would cause it to be set
+ * to April 30.
+ *
+ * Subclassing:
+ *
+ * This utility method is intended for use by subclasses that need to implement
+ * their own overrides of {@link #roll roll} and {@link #add add}.
+ *
+ * Note:
+ * pinField is implemented in terms of
+ * {@link #getActualMinimum getActualMinimum}
+ * and {@link #getActualMaximum getActualMaximum}. If either of those methods uses
+ * a slow, iterative algorithm for a particular field, it would be
+ * unwise to attempt to call pinField for that field. If you
+ * really do need to do so, you should override this method to do
+ * something more efficient for that field.
+ *
+ * @param field The calendar field whose value should be pinned. + * @param status Output param set to failure code on function return + * when this function fails. + * + * @see #getActualMinimum + * @see #getActualMaximum + * @stable ICU 2.0 + */ + virtual void pinField(UCalendarDateFields field, UErrorCode& status); + + /** + * Return the week number of a day, within a period. This may be the week number in + * a year or the week number in a month. Usually this will be a value >= 1, but if + * some initial days of the period are excluded from week 1, because + * {@link #getMinimalDaysInFirstWeek getMinimalDaysInFirstWeek} is > 1, then + * the week number will be zero for those + * initial days. This method requires the day number and day of week for some + * known date in the period in order to determine the day of week + * on the desired day. + *
+ * Subclassing:
+ *
+ * This method is intended for use by subclasses in implementing their
+ * {@link #computeTime computeTime} and/or {@link #computeFields computeFields} methods.
+ * It is often useful in {@link #getActualMinimum getActualMinimum} and
+ * {@link #getActualMaximum getActualMaximum} as well.
+ *
+ * This variant is handy for computing the week number of some other + * day of a period (often the first or last day of the period) when its day + * of the week is not known but the day number and day of week for some other + * day in the period (e.g. the current date) is known. + *
+ * @param desiredDay The {@link #UCalendarDateFields DAY_OF_YEAR} or
+ * {@link #UCalendarDateFields DAY_OF_MONTH} whose week number is desired.
+ * Should be 1 for the first day of the period.
+ *
+ * @param dayOfPeriod The {@link #UCalendarDateFields DAY_OF_YEAR}
+ * or {@link #UCalendarDateFields DAY_OF_MONTH} for a day in the period whose
+ * {@link #UCalendarDateFields DAY_OF_WEEK} is specified by the
+ * knownDayOfWeek parameter.
+ * Should be 1 for first day of period.
+ *
+ * @param dayOfWeek The {@link #UCalendarDateFields DAY_OF_WEEK} for the day
+ * corresponding to the knownDayOfPeriod parameter.
+ * 1-based with 1=Sunday.
+ *
+ * @return The week number (one-based), or zero if the day falls before
+ * the first week because
+ * {@link #getMinimalDaysInFirstWeek getMinimalDaysInFirstWeek}
+ * is more than one.
+ *
+ * @stable ICU 2.8
+ */
+ int32_t weekNumber(int32_t desiredDay, int32_t dayOfPeriod, int32_t dayOfWeek);
+
+
+#ifndef U_HIDE_INTERNAL_API
+ /**
+ * Return the week number of a day, within a period. This may be the week number in
+ * a year, or the week number in a month. Usually this will be a value >= 1, but if
+ * some initial days of the period are excluded from week 1, because
+ * {@link #getMinimalDaysInFirstWeek getMinimalDaysInFirstWeek} is > 1,
+ * then the week number will be zero for those
+ * initial days. This method requires the day of week for the given date in order to
+ * determine the result.
+ *
+ * Subclassing:
+ *
+ * This method is intended for use by subclasses in implementing their
+ * {@link #computeTime computeTime} and/or {@link #computeFields computeFields} methods.
+ * It is often useful in {@link #getActualMinimum getActualMinimum} and
+ * {@link #getActualMaximum getActualMaximum} as well.
+ *
+ * @param dayOfPeriod The {@link #UCalendarDateFields DAY_OF_YEAR} or
+ * {@link #UCalendarDateFields DAY_OF_MONTH} whose week number is desired.
+ * Should be 1 for the first day of the period.
+ *
+ * @param dayOfWeek The {@link #UCalendarDateFields DAY_OF_WEEK} for the day
+ * corresponding to the dayOfPeriod parameter.
+ * 1-based with 1=Sunday.
+ *
+ * @return The week number (one-based), or zero if the day falls before
+ * the first week because
+ * {@link #getMinimalDaysInFirstWeek getMinimalDaysInFirstWeek}
+ * is more than one.
+ * @internal
+ */
+ inline int32_t weekNumber(int32_t dayOfPeriod, int32_t dayOfWeek);
+
+ /**
+ * returns the local DOW, valid range 0..6
+ * @internal
+ */
+ int32_t getLocalDOW();
+#endif /* U_HIDE_INTERNAL_API */
+
+private:
+
+ /**
+ * The next available value for fStamp[]
+ */
+ int32_t fNextStamp;// = MINIMUM_USER_STAMP;
+
+ /**
+ * Recalculates the time stamp array (fStamp).
+ * Resets fNextStamp to lowest next stamp value.
+ */
+ void recalculateStamp();
+
+ /**
+ * The current time set for the calendar.
+ */
+ UDate fTime;
+
+ /**
+ * @see #setLenient
+ */
+ UBool fLenient;
+
+ /**
+ * Time zone affects the time calculation done by Calendar. Calendar subclasses use
+ * the time zone data to produce the local time.
+ */
+ TimeZone* fZone;
+
+ /**
+ * Option for rpeated wall time
+ * @see #setRepeatedWallTimeOption
+ */
+ UCalendarWallTimeOption fRepeatedWallTime;
+
+ /**
+ * Option for skipped wall time
+ * @see #setSkippedWallTimeOption
+ */
+ UCalendarWallTimeOption fSkippedWallTime;
+
+ /**
+ * Both firstDayOfWeek and minimalDaysInFirstWeek are locale-dependent. They are
+ * used to figure out the week count for a specific date for a given locale. These
+ * must be set when a Calendar is constructed. For example, in US locale,
+ * firstDayOfWeek is SUNDAY; minimalDaysInFirstWeek is 1. They are used to figure
+ * out the week count for a specific date for a given locale. These must be set when
+ * a Calendar is constructed.
+ */
+ UCalendarDaysOfWeek fFirstDayOfWeek;
+ uint8_t fMinimalDaysInFirstWeek;
+ UCalendarDaysOfWeek fWeekendOnset;
+ int32_t fWeekendOnsetMillis;
+ UCalendarDaysOfWeek fWeekendCease;
+ int32_t fWeekendCeaseMillis;
+
+ /**
+ * Sets firstDayOfWeek and minimalDaysInFirstWeek. Called at Calendar construction
+ * time.
+ *
+ * @param desiredLocale The given locale.
+ * @param type The calendar type identifier, e.g: gregorian, buddhist, etc.
+ * @param success Indicates the status of setting the week count data from
+ * the resource for the given locale. Returns U_ZERO_ERROR if
+ * constructed successfully.
+ */
+ void setWeekData(const Locale& desiredLocale, const char *type, UErrorCode& success);
+
+ /**
+ * Recompute the time and update the status fields isTimeSet
+ * and areFieldsSet. Callers should check isTimeSet and only
+ * call this method if isTimeSet is false.
+ *
+ * @param status Output param set to success/failure code on exit. If any value
+ * previously set in the time field is invalid or restricted by
+ * leniency, this will be set to an error status.
+ */
+ void updateTime(UErrorCode& status);
+
+ /**
+ * The Gregorian year, as computed by computeGregorianFields() and
+ * returned by getGregorianYear().
+ * @see #computeGregorianFields
+ */
+ int32_t fGregorianYear;
+
+ /**
+ * The Gregorian month, as computed by computeGregorianFields() and
+ * returned by getGregorianMonth().
+ * @see #computeGregorianFields
+ */
+ int32_t fGregorianMonth;
+
+ /**
+ * The Gregorian day of the year, as computed by
+ * computeGregorianFields() and returned by getGregorianDayOfYear().
+ * @see #computeGregorianFields
+ */
+ int32_t fGregorianDayOfYear;
+
+ /**
+ * The Gregorian day of the month, as computed by
+ * computeGregorianFields() and returned by getGregorianDayOfMonth().
+ * @see #computeGregorianFields
+ */
+ int32_t fGregorianDayOfMonth;
+
+ /* calculations */
+
+ /**
+ * Compute the Gregorian calendar year, month, and day of month from
+ * the given Julian day. These values are not stored in fields, but in
+ * member variables gregorianXxx. Also compute the DAY_OF_WEEK and
+ * DOW_LOCAL fields.
+ */
+ void computeGregorianAndDOWFields(int32_t julianDay, UErrorCode &ec);
+
+protected:
+
+ /**
+ * Compute the Gregorian calendar year, month, and day of month from the
+ * Julian day. These values are not stored in fields, but in member
+ * variables gregorianXxx. They are used for time zone computations and by
+ * subclasses that are Gregorian derivatives. Subclasses may call this
+ * method to perform a Gregorian calendar millis->fields computation.
+ */
+ void computeGregorianFields(int32_t julianDay, UErrorCode &ec);
+
+private:
+
+ /**
+ * Compute the fields WEEK_OF_YEAR, YEAR_WOY, WEEK_OF_MONTH,
+ * DAY_OF_WEEK_IN_MONTH, and DOW_LOCAL from EXTENDED_YEAR, YEAR,
+ * DAY_OF_WEEK, and DAY_OF_YEAR. The latter fields are computed by the
+ * subclass based on the calendar system.
+ *
+ *
The YEAR_WOY field is computed simplistically. It is equal to YEAR
+ * most of the time, but at the year boundary it may be adjusted to YEAR-1
+ * or YEAR+1 to reflect the overlap of a week into an adjacent year. In
+ * this case, a simple increment or decrement is performed on YEAR, even
+ * though this may yield an invalid YEAR value. For instance, if the YEAR
+ * is part of a calendar system with an N-year cycle field CYCLE, then
+ * incrementing the YEAR may involve incrementing CYCLE and setting YEAR
+ * back to 0 or 1. This is not handled by this code, and in fact cannot be
+ * simply handled without having subclasses define an entire parallel set of
+ * fields for fields larger than or equal to a year. This additional
+ * complexity is not warranted, since the intention of the YEAR_WOY field is
+ * to support ISO 8601 notation, so it will typically be used with a
+ * proleptic Gregorian calendar, which has no field larger than a year.
+ */
+ void computeWeekFields(UErrorCode &ec);
+
+
+ /**
+ * Ensure that each field is within its valid range by calling {@link
+ * #validateField(int, int&)} on each field that has been set. This method
+ * should only be called if this calendar is not lenient.
+ * @see #isLenient
+ * @see #validateField(int, int&)
+ * @internal
+ */
+ void validateFields(UErrorCode &status);
+
+ /**
+ * Validate a single field of this calendar. Subclasses should
+ * override this method to validate any calendar-specific fields.
+ * Generic fields can be handled by
+ * Calendar::validateField().
+ * @see #validateField(int, int, int, int&)
+ * @internal
+ */
+ virtual void validateField(UCalendarDateFields field, UErrorCode &status);
+
+ /**
+ * Validate a single field of this calendar given its minimum and
+ * maximum allowed value. If the field is out of range,
+ * U_ILLEGAL_ARGUMENT_ERROR will be set. Subclasses may
+ * use this method in their implementation of {@link
+ * #validateField(int, int&)}.
+ * @internal
+ */
+ void validateField(UCalendarDateFields field, int32_t min, int32_t max, UErrorCode& status);
+
+ protected:
+#ifndef U_HIDE_INTERNAL_API
+ /**
+ * Convert a quasi Julian date to the day of the week. The Julian date used here is
+ * not a true Julian date, since it is measured from midnight, not noon. Return
+ * value is one-based.
+ *
+ * @param julian The given Julian date number.
+ * @return Day number from 1..7 (SUN..SAT).
+ * @internal
+ */
+ static uint8_t julianDayToDayOfWeek(double julian);
+#endif /* U_HIDE_INTERNAL_API */
+
+ private:
+ char validLocale[ULOC_FULLNAME_CAPACITY];
+ char actualLocale[ULOC_FULLNAME_CAPACITY];
+
+ public:
+#if !UCONFIG_NO_SERVICE
+ /**
+ * INTERNAL FOR 2.6 -- Registration.
+ */
+
+#ifndef U_HIDE_INTERNAL_API
+ /**
+ * Return a StringEnumeration over the locales available at the time of the call,
+ * including registered locales.
+ * @return a StringEnumeration over the locales available at the time of the call
+ * @internal
+ */
+ static StringEnumeration* getAvailableLocales(void);
+
+ /**
+ * Register a new Calendar factory. The factory will be adopted.
+ * INTERNAL in 2.6
+ * @param toAdopt the factory instance to be adopted
+ * @param status the in/out status code, no special meanings are assigned
+ * @return a registry key that can be used to unregister this factory
+ * @internal
+ */
+ static URegistryKey registerFactory(ICUServiceFactory* toAdopt, UErrorCode& status);
+
+ /**
+ * Unregister a previously-registered CalendarFactory using the key returned from the
+ * register call. Key becomes invalid after a successful call and should not be used again.
+ * The CalendarFactory corresponding to the key will be deleted.
+ * INTERNAL in 2.6
+ * @param key the registry key returned by a previous call to registerFactory
+ * @param status the in/out status code, no special meanings are assigned
+ * @return TRUE if the factory for the key was successfully unregistered
+ * @internal
+ */
+ static UBool unregister(URegistryKey key, UErrorCode& status);
+#endif /* U_HIDE_INTERNAL_API */
+
+ /**
+ * Multiple Calendar Implementation
+ * @internal
+ */
+ friend class CalendarFactory;
+
+ /**
+ * Multiple Calendar Implementation
+ * @internal
+ */
+ friend class CalendarService;
+
+ /**
+ * Multiple Calendar Implementation
+ * @internal
+ */
+ friend class DefaultCalendarFactory;
+#endif /* !UCONFIG_NO_SERVICE */
+
+ /**
+ * @return TRUE if this calendar has a default century (i.e. 03 -> 2003)
+ * @internal
+ */
+ virtual UBool haveDefaultCentury() const = 0;
+
+ /**
+ * @return the start of the default century, as a UDate
+ * @internal
+ */
+ virtual UDate defaultCenturyStart() const = 0;
+ /**
+ * @return the beginning year of the default century, as a year
+ * @internal
+ */
+ virtual int32_t defaultCenturyStartYear() const = 0;
+
+ /** Get the locale for this calendar object. You can choose between valid and actual locale.
+ * @param type type of the locale we're looking for (valid or actual)
+ * @param status error code for the operation
+ * @return the locale
+ * @stable ICU 2.8
+ */
+ Locale getLocale(ULocDataLocaleType type, UErrorCode &status) const;
+
+#ifndef U_HIDE_INTERNAL_API
+ /** Get the locale for this calendar object. You can choose between valid and actual locale.
+ * @param type type of the locale we're looking for (valid or actual)
+ * @param status error code for the operation
+ * @return the locale
+ * @internal
+ */
+ const char* getLocaleID(ULocDataLocaleType type, UErrorCode &status) const;
+#endif /* U_HIDE_INTERNAL_API */
+
+private:
+ /**
+ * Cast TimeZone used by this object to BasicTimeZone, or NULL if the TimeZone
+ * is not an instance of BasicTimeZone.
+ */
+ BasicTimeZone* getBasicTimeZone() const;
+};
+
+// -------------------------------------
+
+inline Calendar*
+Calendar::createInstance(TimeZone* zone, UErrorCode& errorCode)
+{
+ // since the Locale isn't specified, use the default locale
+ return createInstance(zone, Locale::getDefault(), errorCode);
+}
+
+// -------------------------------------
+
+inline void
+Calendar::roll(UCalendarDateFields field, UBool up, UErrorCode& status)
+{
+ roll(field, (int32_t)(up ? +1 : -1), status);
+}
+
+#ifndef U_HIDE_DEPRECATED_API
+inline void
+Calendar::roll(EDateFields field, UBool up, UErrorCode& status)
+{
+ roll((UCalendarDateFields) field, up, status);
+}
+#endif
+
+
+// -------------------------------------
+
+/**
+ * Fast method for subclasses. The caller must maintain fUserSetDSTOffset and
+ * fUserSetZoneOffset, as well as the isSet[] array.
+ */
+
+inline void
+Calendar::internalSet(UCalendarDateFields field, int32_t value)
+{
+ fFields[field] = value;
+ fStamp[field] = kInternallySet;
+ fIsSet[field] = TRUE; // Remove later
+}
+
+
+#ifndef U_HIDE_INTERNAL_API
+inline int32_t Calendar::weekNumber(int32_t dayOfPeriod, int32_t dayOfWeek)
+{
+ return weekNumber(dayOfPeriod, dayOfPeriod, dayOfWeek);
+}
+#endif
+
+U_NAMESPACE_END
+
+#endif /* #if !UCONFIG_NO_FORMATTING */
+
+#endif // _CALENDAR