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Posted to commits@couchdb.apache.org by da...@apache.org on 2014/02/06 18:28:25 UTC
[43/46] support static build
http://git-wip-us.apache.org/repos/asf/couchdb-couch-collate/blob/32ffa429/platform/osx/icu/unicode/calendar.h
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diff --git a/platform/osx/icu/unicode/calendar.h b/platform/osx/icu/unicode/calendar.h
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+/*
+********************************************************************************
+* Copyright (C) 1997-2008, International Business Machines
+* Corporation and others. All Rights Reserved.
+********************************************************************************
+*
+* File CALENDAR.H
+*
+* Modification History:
+*
+* Date Name Description
+* 04/22/97 aliu Expanded and corrected comments and other header
+* contents.
+* 05/01/97 aliu Made equals(), before(), after() arguments const.
+* 05/20/97 aliu Replaced fAreFieldsSet with fAreFieldsInSync and
+* fAreAllFieldsSet.
+* 07/27/98 stephen Sync up with JDK 1.2
+* 11/15/99 weiv added YEAR_WOY and DOW_LOCAL
+* to EDateFields
+* 8/19/2002 srl Removed Javaisms
+* 11/07/2003 srl Update, clean up documentation.
+********************************************************************************
+*/
+
+#ifndef CALENDAR_H
+#define CALENDAR_H
+
+#include "unicode/utypes.h"
+
+/**
+ * \file
+ * \brief C++ API: Calendar object
+ */
+#if !UCONFIG_NO_FORMATTING
+
+#include "unicode/uobject.h"
+#include "unicode/locid.h"
+#include "unicode/timezone.h"
+#include "unicode/ucal.h"
+#include "unicode/umisc.h"
+
+U_NAMESPACE_BEGIN
+
+class ICUServiceFactory;
+
+/**
+ * @internal
+ */
+typedef int32_t UFieldResolutionTable[12][8];
+
+/**
+ * <code>Calendar</code> is an abstract base class for converting between
+ * a <code>UDate</code> object and a set of integer fields such as
+ * <code>YEAR</code>, <code>MONTH</code>, <code>DAY</code>, <code>HOUR</code>,
+ * and so on. (A <code>UDate</code> object represents a specific instant in
+ * time with millisecond precision. See UDate
+ * for information about the <code>UDate</code> class.)
+ *
+ * <p>
+ * Subclasses of <code>Calendar</code> interpret a <code>UDate</code>
+ * according to the rules of a specific calendar system.
+ * The most commonly used subclass of <code>Calendar</code> is
+ * <code>GregorianCalendar</code>. Other subclasses could represent
+ * the various types of lunar calendars in use in many parts of the world.
+ *
+ * <p>
+ * <b>NOTE</b>: (ICU 2.6) The subclass interface should be considered unstable
+ * - it WILL change.
+ *
+ * <p>
+ * Like other locale-sensitive classes, <code>Calendar</code> provides a
+ * static method, <code>createInstance</code>, for getting a generally useful
+ * object of this type. <code>Calendar</code>'s <code>createInstance</code> method
+ * returns the appropriate <code>Calendar</code> subclass whose
+ * time fields have been initialized with the current date and time:
+ * \htmlonly<blockquote>\endhtmlonly
+ * <pre>
+ * Calendar *rightNow = Calendar::createInstance(errCode);
+ * </pre>
+ * \htmlonly</blockquote>\endhtmlonly
+ *
+ * <p>
+ * A <code>Calendar</code> 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).
+ *
+ * <p>
+ * When computing a <code>UDate</code> from time fields, two special circumstances
+ * may arise: there may be insufficient information to compute the
+ * <code>UDate</code> (such as only year and month but no day in the month),
+ * or there may be inconsistent information (such as "Tuesday, July 15, 1996"
+ * -- July 15, 1996 is actually a Monday).
+ *
+ * <p>
+ * <strong>Insufficient information.</strong> 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.
+ *
+ * <p>
+ * <strong>Inconsistent information.</strong> 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<blockquote>\endhtmlonly
+ * <pre>
+ * 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
+ * </pre>
+ * \htmlonly</blockquote>\endhtmlonly
+ *
+ * For the time of day:
+ *
+ * \htmlonly<blockquote>\endhtmlonly
+ * <pre>
+ * HOUR_OF_DAY
+ * AM_PM + HOUR
+ * </pre>
+ * \htmlonly</blockquote>\endhtmlonly
+ *
+ * <p>
+ * <strong>Note:</strong> 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 <em>and</em> day-of-week in some cases.
+ *
+ * <p>
+ * <strong>Note:</strong> There are certain possible ambiguities in
+ * interpretation of certain singular times, which are resolved in the
+ * following ways:
+ * <ol>
+ * <li> 24:00:00 "belongs" to the following day. That is,
+ * 23:59 on Dec 31, 1969 < 24:00 on Jan 1, 1970 < 24:01:00 on Jan 1, 1970
+ *
+ * <li> Although historically not precise, midnight also belongs to "am",
+ * and noon belongs to "pm", so on the same day,
+ * 12:00 am (midnight) < 12:01 am, and 12:00 pm (noon) < 12:01 pm
+ * </ol>
+ *
+ * <p>
+ * 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.
+ *
+ * <p>
+ * <code>Calendar</code> 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 <code>December 12, <b>1996</b></code> results in
+ * <code>January 12, <b>1996</b></code>.
+ *
+ * <p>
+ * <code>Calendar</code> 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 <code>September 12, 1996</code>
+ * results in <code>September 7, 1996</code>.
+ *
+ * @stable ICU 2.0
+ */
+class U_I18N_API Calendar : public UObject {
+public:
+
+ /**
+ * Field IDs for date and time. Used to specify date/time fields. ERA is calendar
+ * specific. Example ranges given are for illustration only; see specific Calendar
+ * subclasses for actual ranges.
+ * @deprecated ICU 2.6. Use C enum UCalendarDateFields defined in ucal.h
+ */
+ enum EDateFields {
+#ifndef U_HIDE_DEPRECATED_API
+ ERA, // Example: 0..1
+ YEAR, // Example: 1..big number
+ MONTH, // Example: 0..11
+ WEEK_OF_YEAR, // Example: 1..53
+ WEEK_OF_MONTH, // Example: 1..4
+ DATE, // Example: 1..31
+ DAY_OF_YEAR, // Example: 1..365
+ DAY_OF_WEEK, // Example: 1..7
+ DAY_OF_WEEK_IN_MONTH, // Example: 1..4, may be specified as -1
+ AM_PM, // Example: 0..1
+ HOUR, // Example: 0..11
+ HOUR_OF_DAY, // Example: 0..23
+ MINUTE, // Example: 0..59
+ SECOND, // Example: 0..59
+ MILLISECOND, // Example: 0..999
+ ZONE_OFFSET, // Example: -12*U_MILLIS_PER_HOUR..12*U_MILLIS_PER_HOUR
+ DST_OFFSET, // Example: 0 or U_MILLIS_PER_HOUR
+ YEAR_WOY, // 'Y' Example: 1..big number - Year of Week of Year
+ DOW_LOCAL, // 'e' Example: 1..7 - Day of Week / Localized
+
+ EXTENDED_YEAR,
+ JULIAN_DAY,
+ MILLISECONDS_IN_DAY,
+ IS_LEAP_MONTH,
+
+ FIELD_COUNT = UCAL_FIELD_COUNT // See ucal.h for other fields.
+#endif /* U_HIDE_DEPRECATED_API */
+ };
+
+ /**
+ * Useful constant for days of week. Note: Calendar day-of-week is 1-based. Clients
+ * who create locale resources for the field of first-day-of-week should be aware of
+ * this. For instance, in US locale, first-day-of-week is set to 1, i.e., SUNDAY.
+ * @deprecated ICU 2.6. Use C enum UCalendarDaysOfWeek defined in ucal.h
+ */
+ enum EDaysOfWeek {
+#ifndef U_HIDE_DEPRECATED_API
+ SUNDAY = 1,
+ MONDAY,
+ TUESDAY,
+ WEDNESDAY,
+ THURSDAY,
+ FRIDAY,
+ SATURDAY
+#endif /* U_HIDE_DEPRECATED_API */
+ };
+
+ /**
+ * Useful constants for month. Note: Calendar month is 0-based.
+ * @deprecated ICU 2.6. Use C enum UCalendarMonths defined in ucal.h
+ */
+ enum EMonths {
+#ifndef U_HIDE_DEPRECATED_API
+ JANUARY,
+ FEBRUARY,
+ MARCH,
+ APRIL,
+ MAY,
+ JUNE,
+ JULY,
+ AUGUST,
+ SEPTEMBER,
+ OCTOBER,
+ NOVEMBER,
+ DECEMBER,
+ UNDECIMBER
+#endif /* U_HIDE_DEPRECATED_API */
+ };
+
+ /**
+ * Useful constants for hour in 12-hour clock. Used in GregorianCalendar.
+ * @deprecated ICU 2.6. Use C enum UCalendarAMPMs defined in ucal.h
+ */
+ enum EAmpm {
+#ifndef U_HIDE_DEPRECATED_API
+ AM,
+ PM
+#endif /* U_HIDE_DEPRECATED_API */
+ };
+
+ /**
+ * destructor
+ * @stable ICU 2.0
+ */
+ virtual ~Calendar();
+
+ /**
+ * Create and return a polymorphic copy of this calendar.
+ *
+ * @return a polymorphic copy of this calendar.
+ * @stable ICU 2.0
+ */
+ virtual Calendar* clone(void) const = 0;
+
+ /**
+ * Creates a Calendar using the default timezone and locale. Clients are responsible
+ * for deleting the object returned.
+ *
+ * @param success Indicates the success/failure of Calendar creation. Filled in
+ * with U_ZERO_ERROR if created successfully, set to a failure result
+ * otherwise. U_MISSING_RESOURCE_ERROR will be returned if the resource data
+ * requests a calendar type which has not been installed.
+ * @return A Calendar if created successfully. NULL otherwise.
+ * @stable ICU 2.0
+ */
+ static Calendar* U_EXPORT2 createInstance(UErrorCode& success);
+
+ /**
+ * Creates a Calendar using the given timezone and the default locale.
+ * The Calendar takes ownership of zoneToAdopt; the
+ * client must not delete it.
+ *
+ * @param zoneToAdopt The given timezone to be adopted.
+ * @param success Indicates the success/failure of Calendar creation. Filled in
+ * with U_ZERO_ERROR if created successfully, set to a failure result
+ * otherwise.
+ * @return A Calendar if created successfully. NULL otherwise.
+ * @stable ICU 2.0
+ */
+ static Calendar* U_EXPORT2 createInstance(TimeZone* zoneToAdopt, UErrorCode& success);
+
+ /**
+ * Creates a Calendar using the given timezone and the default locale. The TimeZone
+ * is _not_ adopted; the client is still responsible for deleting it.
+ *
+ * @param zone The timezone.
+ * @param success Indicates the success/failure of Calendar creation. Filled in
+ * with U_ZERO_ERROR if created successfully, set to a failure result
+ * otherwise.
+ * @return A Calendar if created successfully. NULL otherwise.
+ * @stable ICU 2.0
+ */
+ static Calendar* U_EXPORT2 createInstance(const TimeZone& zone, UErrorCode& success);
+
+ /**
+ * Creates a Calendar using the default timezone and the given locale.
+ *
+ * @param aLocale The given locale.
+ * @param success Indicates the success/failure of Calendar creation. Filled in
+ * with U_ZERO_ERROR if created successfully, set to a failure result
+ * otherwise.
+ * @return A Calendar if created successfully. NULL otherwise.
+ * @stable ICU 2.0
+ */
+ static Calendar* U_EXPORT2 createInstance(const Locale& aLocale, UErrorCode& success);
+
+ /**
+ * Creates a Calendar using the given timezone and given locale.
+ * The Calendar takes ownership of zoneToAdopt; the
+ * client must not delete it.
+ *
+ * @param zoneToAdopt The given timezone to be adopted.
+ * @param aLocale The given locale.
+ * @param success Indicates the success/failure of Calendar creation. Filled in
+ * with U_ZERO_ERROR if created successfully, set to a failure result
+ * otherwise.
+ * @return A Calendar if created successfully. NULL otherwise.
+ * @stable ICU 2.0
+ */
+ static Calendar* U_EXPORT2 createInstance(TimeZone* zoneToAdopt, const Locale& aLocale, UErrorCode& success);
+
+ /**
+ * Gets a Calendar using the given timezone and given locale. The TimeZone
+ * is _not_ adopted; the client is still responsible for deleting it.
+ *
+ * @param zoneToAdopt The given timezone to be adopted.
+ * @param aLocale The given locale.
+ * @param success Indicates the success/failure of Calendar creation. Filled in
+ * with U_ZERO_ERROR if created successfully, set to a failure result
+ * otherwise.
+ * @return A Calendar if created successfully. NULL otherwise.
+ * @stable ICU 2.0
+ */
+ static Calendar* U_EXPORT2 createInstance(const TimeZone& zoneToAdopt, const Locale& aLocale, UErrorCode& success);
+
+ /**
+ * Returns a list of the locales for which Calendars are installed.
+ *
+ * @param count Number of locales returned.
+ * @return An array of Locale objects representing the set of locales for which
+ * Calendars are installed. The system retains ownership of this list;
+ * the caller must NOT delete it. Does not include user-registered Calendars.
+ * @stable ICU 2.0
+ */
+ static const Locale* U_EXPORT2 getAvailableLocales(int32_t& count);
+
+ /**
+ * Returns the current UTC (GMT) time measured in milliseconds since 0:00:00 on 1/1/70
+ * (derived from the system time).
+ *
+ * @return The current UTC time in milliseconds.
+ * @stable ICU 2.0
+ */
+ static UDate U_EXPORT2 getNow(void);
+
+ /**
+ * Gets this Calendar's time as milliseconds. May involve recalculation of time due
+ * to previous calls to set time field values. The time specified is non-local UTC
+ * (GMT) time. Although this method is const, this object may actually be changed
+ * (semantically const).
+ *
+ * @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 in UTC (GMT) time, or zero if the operation
+ * failed.
+ * @stable ICU 2.0
+ */
+ inline UDate getTime(UErrorCode& status) const { return getTimeInMillis(status); }
+
+ /**
+ * Sets this Calendar's current time with the given UDate. The time specified should
+ * be in non-local UTC (GMT) time.
+ *
+ * @param date The given UDate in UTC (GMT) time.
+ * @param status Output param set to success/failure code on exit. If any value
+ * set in the time field is invalid or restricted by
+ * leniency, this will be set to an error status.
+ * @stable ICU 2.0
+ */
+ inline void setTime(UDate date, UErrorCode& status) { setTimeInMillis(date, status); }
+
+ /**
+ * Compares the equality of two Calendar objects. Objects of different subclasses
+ * are considered unequal. This comparison is very exacting; two Calendar objects
+ * must be in exactly the same state to be considered equal. To compare based on the
+ * represented time, use equals() instead.
+ *
+ * @param that The Calendar object to be compared with.
+ * @return True if the given Calendar is the same as this Calendar; false
+ * otherwise.
+ * @stable ICU 2.0
+ */
+ virtual UBool operator==(const Calendar& that) const;
+
+ /**
+ * Compares the inequality of two Calendar objects.
+ *
+ * @param that The Calendar object to be compared with.
+ * @return True if the given Calendar is not the same as this Calendar; false
+ * otherwise.
+ * @stable ICU 2.0
+ */
+ UBool operator!=(const Calendar& that) const {return !operator==(that);}
+
+ /**
+ * Returns TRUE if the given Calendar object is equivalent to this
+ * one. An equivalent Calendar will behave exactly as this one
+ * does, but it may be set to a different time. By contrast, for
+ * the operator==() method to return TRUE, the other Calendar must
+ * be set to the same time.
+ *
+ * @param other the Calendar to be compared with this Calendar
+ * @stable ICU 2.4
+ */
+ virtual UBool isEquivalentTo(const Calendar& other) const;
+
+ /**
+ * Compares the Calendar time, whereas Calendar::operator== compares the equality of
+ * Calendar objects.
+ *
+ * @param when The Calendar to be compared with this Calendar. Although this is a
+ * const parameter, the object may be modified physically
+ * (semantically const).
+ * @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 True if the current time of this Calendar is equal to the time of
+ * Calendar when; false otherwise.
+ * @stable ICU 2.0
+ */
+ UBool equals(const Calendar& when, UErrorCode& status) const;
+
+ /**
+ * Returns true if this Calendar's current time is before "when"'s current time.
+ *
+ * @param when The Calendar to be compared with this Calendar. Although this is a
+ * const parameter, the object may be modified physically
+ * (semantically const).
+ * @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 True if the current time of this Calendar is before the time of
+ * Calendar when; false otherwise.
+ * @stable ICU 2.0
+ */
+ UBool before(const Calendar& when, UErrorCode& status) const;
+
+ /**
+ * Returns true if this Calendar's current time is after "when"'s current time.
+ *
+ * @param when The Calendar to be compared with this Calendar. Although this is a
+ * const parameter, the object may be modified physically
+ * (semantically const).
+ * @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 True if the current time of this Calendar is after the time of
+ * Calendar when; false otherwise.
+ * @stable ICU 2.0
+ */
+ UBool after(const Calendar& when, UErrorCode& status) const;
+
+ /**
+ * UDate Arithmetic function. Adds the specified (signed) amount of time to the given
+ * time field, based on the calendar's rules. For example, to subtract 5 days from
+ * the current time of the calendar, call add(Calendar::DATE, -5). When adding on
+ * the month or Calendar::MONTH field, other fields like date might conflict and
+ * need to be changed. For instance, adding 1 month on the date 01/31/96 will result
+ * in 02/29/96.
+ *
+ * @param field Specifies which date field to modify.
+ * @param amount The amount of time to be added to the field, in the natural unit
+ * for that field (e.g., days for the day fields, hours for the hour
+ * field.)
+ * @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 add(UCalendarDateFields field, int32_t amount, UErrorCode& status) instead.
+ */
+ virtual void add(EDateFields field, int32_t amount, UErrorCode& status);
+
+ /**
+ * UDate Arithmetic function. Adds the specified (signed) amount of time to the given
+ * time field, based on the calendar's rules. For example, to subtract 5 days from
+ * the current time of the calendar, call add(Calendar::DATE, -5). When adding on
+ * the month or Calendar::MONTH field, other fields like date might conflict and
+ * need to be changed. For instance, adding 1 month on the date 01/31/96 will result
+ * in 02/29/96.
+ *
+ * @param field Specifies which date field to modify.
+ * @param amount The amount of time to be added to the field, in the natural unit
+ * for that field (e.g., days for the day fields, hours for the hour
+ * field.)
+ * @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.
+ */
+ virtual void add(UCalendarDateFields field, int32_t amount, UErrorCode& status);
+
+ /**
+ * 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; e.g., rolling the year
+ * up on "100 BC" will result in "99 BC", for Gregorian calendar. 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.
+ * <P>
+ * 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);
+
+ /**
+ * 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; e.g., rolling the year
+ * up on "100 BC" will result in "99 BC", for Gregorian calendar. 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.
+ * <P>
+ * 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;
+ * e.g., rolling the year by +1 on "100 BC" will result in "99 BC", for Gregorian
+ * calendar. 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.
+ * <P>
+ * 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;
+ * e.g., rolling the year by +1 on "100 BC" will result in "99 BC", for Gregorian
+ * calendar. 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.
+ * <P>
+ * 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
+ * <em>before</em> the given time, the returned value will be
+ * positive. If this calendar is set <em>after</em> the given
+ * time, the returned value will be negative. The
+ * <code>field</code> parameter specifies the units of the return
+ * value. For example, if <code>fieldDifference(when,
+ * Calendar::MONTH)</code> returns 3, then this calendar is set to
+ * 3 months before <code>when</code>, and possibly some addition
+ * time less than one month.
+ *
+ * <p>As a side effect of this call, this calendar is advanced
+ * toward <code>when</code> by the given amount. That is, calling
+ * this method has the side effect of calling <code>add(field,
+ * n)</code>, where <code>n</code> is the return value.
+ *
+ * <p>Usage: To use this method, call it first with the largest
+ * field of interest, then with progressively smaller fields. For
+ * example:
+ *
+ * <pre>
+ * int y = cal->fieldDifference(when, Calendar::YEAR, err);
+ * int m = cal->fieldDifference(when, Calendar::MONTH, err);
+ * int d = cal->fieldDifference(when, Calendar::DATE, err);</pre>
+ *
+ * computes the difference between <code>cal</code> and
+ * <code>when</code> in years, months, and days.
+ *
+ * <p>Note: <code>fieldDifference()</code> is
+ * <em>asymmetrical</em>. That is, in the following code:
+ *
+ * <pre>
+ * 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);</pre>
+ *
+ * one might expect that <code>m1 == -m2 && d1 == -d2</code>.
+ * 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 <code>when</code>, in terms of
+ * <code>field</code>.
+ * @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
+ * <em>before</em> the given time, the returned value will be
+ * positive. If this calendar is set <em>after</em> the given
+ * time, the returned value will be negative. The
+ * <code>field</code> parameter specifies the units of the return
+ * value. For example, if <code>fieldDifference(when,
+ * Calendar::MONTH)</code> returns 3, then this calendar is set to
+ * 3 months before <code>when</code>, and possibly some addition
+ * time less than one month.
+ *
+ * <p>As a side effect of this call, this calendar is advanced
+ * toward <code>when</code> by the given amount. That is, calling
+ * this method has the side effect of calling <code>add(field,
+ * n)</code>, where <code>n</code> is the return value.
+ *
+ * <p>Usage: To use this method, call it first with the largest
+ * field of interest, then with progressively smaller fields. For
+ * example:
+ *
+ * <pre>
+ * int y = cal->fieldDifference(when, Calendar::YEAR, err);
+ * int m = cal->fieldDifference(when, Calendar::MONTH, err);
+ * int d = cal->fieldDifference(when, Calendar::DATE, err);</pre>
+ *
+ * computes the difference between <code>cal</code> and
+ * <code>when</code> in years, months, and days.
+ *
+ * <p>Note: <code>fieldDifference()</code> is
+ * <em>asymmetrical</em>. That is, in the following code:
+ *
+ * <pre>
+ * 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);</pre>
+ *
+ * one might expect that <code>m1 == -m2 && d1 == -d2</code>.
+ * 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 <code>when</code>, in terms of
+ * <code>field</code>.
+ * @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 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);
+
+ /**
+ * 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);
+
+ /**
+ * 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;
+
+ /**
+ * 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;
+
+ /**
+ * 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;
+
+ /**
+ * 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;
+
+ /**
+ * 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;
+
+ /**
+ * 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;
+
+ /**
+ * 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;
+
+ /**
+ * 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;
+
+ /**
+ * 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;
+
+ /**
+ * 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;
+
+ /**
+ * 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);
+
+ /**
+ * 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);
+
+ /**
+ * 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);
+
+ /**
+ * 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.
+ * <P>
+ * 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 resource key string used for this calendar type.
+ * For example, prepending "Eras_" to this string could return "Eras_japanese"
+ * or "Eras_gregorian".
+ *
+ * @returns static string, for example, "gregorian" or "japanese"
+ * @internal
+ */
+ virtual const char * getType() const = 0;
+
+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);
+
+ /**
+ * 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];}
+
+ /**
+ * 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];}
+
+ /**
+ * 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);
+
+ /**
+ * 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 {
+ UCAL_LIMIT_MINIMUM = 0,
+ UCAL_LIMIT_GREATEST_MINIMUM,
+ UCAL_LIMIT_LEAST_MAXIMUM,
+ UCAL_LIMIT_MAXIMUM,
+ UCAL_LIMIT_COUNT
+ };
+
+ /**
+ * 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 = 0;
+
+ /**
+ * Return a limit for a field.
+ * @param field the field, from <code>0..UCAL_MAX_FIELD</code>
+ * @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
+ * @internal
+ * @return the extended year, UCAL_EXTENDED_YEAR
+ */
+ virtual int32_t handleGetExtendedYearFromWeekFields(int32_t yearWoy, int32_t woy);
+
+ /**
+ * 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.
+ *
+ * <p>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.
+ *
+ * <p>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 <code>kResolveRemap | F</code> at
+ * the start of the line, where <code>F</code> 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.
+ *
+ * <p>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);
+
+
+ /**
+ * @internal
+ */
+ virtual const UFieldResolutionTable* getFieldResolutionTable() const;
+
+ /**
+ * 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;
+
+
+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.
+ * <P>
+ * 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:
+ *
+ * <ul><li>ERA
+ * <li>YEAR
+ * <li>MONTH
+ * <li>DAY_OF_MONTH
+ * <li>DAY_OF_YEAR
+ * <li>EXTENDED_YEAR</ul>
+ *
+ * Subclasses can refer to the DAY_OF_WEEK and DOW_LOCAL fields, which
+ * will be set when this method is called. Subclasses can also call
+ * the getGregorianXxx() methods to obtain Gregorian calendar
+ * equivalents for the given Julian day.
+ *
+ * <p>In addition, subclasses should compute any subclass-specific
+ * fields, that is, fields from BASE_FIELD_COUNT to
+ * getFieldCount() - 1.
+ *
+ * <p>The default implementation in <code>Calendar</code> implements
+ * a pure proleptic Gregorian calendar.
+ * @internal
+ */
+ virtual void handleComputeFields(int32_t julianDay, UErrorCode &status);
+
+ /**
+ * Return the extended year on the Gregorian calendar as computed by
+ * <code>computeGregorianFields()</code>.
+ * @internal
+ */
+ int32_t getGregorianYear() const {
+ return fGregorianYear;
+ }
+
+ /**
+ * Return the month (0-based) on the Gregorian calendar as computed by
+ * <code>computeGregorianFields()</code>.
+ * @internal
+ */
+ int32_t getGregorianMonth() const {
+ return fGregorianMonth;
+ }
+
+ /**
+ * Return the day of year (1-based) on the Gregorian calendar as
+ * computed by <code>computeGregorianFields()</code>.
+ * @internal
+ */
+ int32_t getGregorianDayOfYear() const {
+ return fGregorianDayOfYear;
+ }
+
+ /**
+ * Return the day of month (1-based) on the Gregorian calendar as
+ * computed by <code>computeGregorianFields()</code>.
+ * @internal
+ */
+ int32_t getGregorianDayOfMonth() const {
+ return fGregorianDayOfMonth;
+ }
+
+ /**
+ * 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.
+ * @internal
+ * @internal
+ */
+ virtual int32_t getDefaultMonthInYear() ;
+
+
+ /**
+ * 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.
+ * @internal
+ */
+ virtual int32_t getDefaultDayInMonth(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.
+ * <p>
+ * <b>Subclassing:</b>
+ * <br>
+ * This utility method is intended for use by subclasses that need to implement
+ * their own overrides of {@link #roll roll} and {@link #add add}.
+ * <p>
+ * <b>Note:</b>
+ * <code>pinField</code> 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 <code>pinField</code> for that field. If you
+ * really do need to do so, you should override this method to do
+ * something more efficient for that field.
+ * <p>
+ * @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.
+ * <p>
+ * <b>Subclassing:</b>
+ * <br>
+ * 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.
+ * <p>
+ * 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) <em>is</em> known.
+ * <p>
+ * @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
+ * <code>knownDayOfWeek</code> parameter.
+ * Should be 1 for first day of period.
+ *
+ * @param dayOfWeek The {@link #UCalendarDateFields DAY_OF_WEEK} for the day
+ * corresponding to the <code>knownDayOfPeriod</code> 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);
+
+
+ /**
+ * 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.
+ * <p>
+ * <b>Subclassing:</b>
+ * <br>
+ * 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.
+ * <p>
+ * @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 <code>dayOfPeriod</code> 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();
+
+private:
+
+ /**
+ * The next available value for fStamp[]
+ */
+ int32_t fNextStamp;// = MINIMUM_USER_STAMP;
+
+ /**
+ * 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;
+
+ /**
+ * 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;
+
+ /**
+ * 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 setWeekCountData(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.
+ * To perform a Gregorian calendar fields->millis computation, call
+ * computeGregorianMonthStart().
+ * @see #computeGregorianMonthStart
+ */
+ 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.
+ *
+ * <p>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
+ * <code>Calendar.validateField()</code>.
+ * @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,
+ * <code>U_ILLEGAL_ARGUMENT_ERROR</code> 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:
+ /**
+ * 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);
+
+ private:
+ char validLocale[ULOC_FULLNAME_CAPACITY];
+ char actualLocale[ULOC_FULLNAME_CAPACITY];
+
+ public:
+#if !UCONFIG_NO_SERVICE
+ /**
+ * INTERNAL FOR 2.6 -- Registration.
+ */
+
+ /**
+ * 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);
+
+ /**
+ * Multiple Calendar Implementation
+ * @internal
+ */
+ friend class CalendarFactory;
+
+ /**
+ * Multiple Calendar Implementation
+ * @internal
+ */
+
<TRUNCATED>