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//opt/alt/alt-nodejs19/root/usr/include/unicode/calendar.h
// © 2016 and later: Unicode, Inc. and others. // License & terms of use: http://www.unicode.org/copyright.html /* ******************************************************************************** * Copyright (C) 1997-2014, 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" #if U_SHOW_CPLUSPLUS_API /** * \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; // Do not conditionalize the following with #ifndef U_HIDE_INTERNAL_API, // it is a return type for a virtual method (@internal) /** * @internal */ typedef int32_t UFieldResolutionTable[12][8]; class BasicTimeZone; /** * `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: * * Calendar *rightNow = Calendar::createInstance(errCode); * * 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. * * 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 * * For the time of day: * * HOUR_OF_DAY * AM_PM + HOUR * * **Ambiguous Wall Clock Time.** When time offset from UTC has * changed, it produces an 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 12:59 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 historical 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: * * 1. 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 * 2. 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 * * 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 `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. * * <p> * The Japanese calendar uses a combination of era name and year number. * When an emperor of Japan abdicates and a new emperor ascends the throne, * a new era is declared and year number is reset to 1. Even if the date of * abdication is scheduled ahead of time, the new era name might not be * announced until just before the date. In such case, ICU4C may include * a start date of future era without actual era name, but not enabled * by default. ICU4C users who want to test the behavior of the future era * can enable the tentative era by: * <ul> * <li>Environment variable <code>ICU_ENABLE_TENTATIVE_ERA=true</code>.</li> * </ul> * * @stable ICU 2.0 */ class U_I18N_API Calendar : public UObject { public: #ifndef U_FORCE_HIDE_DEPRECATED_API /** * 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 may be defined on other platforms. To avoid any potential problems undefined it here. */ #ifdef ERA #undef ERA #endif 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 */ }; #endif // U_FORCE_HIDE_DEPRECATED_API #ifndef 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 { SUNDAY = 1, MONDAY, TUESDAY, WEDNESDAY, THURSDAY, FRIDAY, SATURDAY }; /** * Useful constants for month. Note: Calendar month is 0-based. * @deprecated ICU 2.6. Use C enum UCalendarMonths defined in ucal.h */ enum EMonths { JANUARY, FEBRUARY, MARCH, APRIL, MAY, JUNE, JULY, AUGUST, SEPTEMBER, OCTOBER, NOVEMBER, DECEMBER, UNDECIMBER }; /** * 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 { 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() 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 zone The given timezone. * @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& zone, 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); /** * Given a key and a locale, returns an array of string values in a preferred * order that would make a difference. These are all and only those values where * the open (creation) of the service with the locale formed from the input locale * plus input keyword and that value has different behavior than creation with the * input locale alone. * @param key one of the keys supported by this service. For now, only * "calendar" is supported. * @param locale the locale * @param commonlyUsed if set to true it will return only commonly used values * with the given locale in preferred order. Otherwise, * it will return all the available values for the locale. * @param status ICU Error Code * @return a string enumeration over keyword values for the given key and the locale. * @stable ICU 4.2 */ static StringEnumeration* U_EXPORT2 getKeywordValuesForLocale(const char* key, const Locale& locale, UBool commonlyUsed, UErrorCode& status); /** * 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 bool 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 */ bool 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; #ifndef U_FORCE_HIDE_DEPRECATED_API /** * 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. * Adding a positive value always means moving forward in time, so for the Gregorian calendar, * starting with 100 BC and adding +1 to year results in 99 BC (even though this actually reduces * the numeric value of the field itself). * * @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); #endif // U_FORCE_HIDE_DEPRECATED_API /** * 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. * Adding a positive value always means moving forward in time, so for the Gregorian calendar, * starting with 100 BC and adding +1 to year results in 99 BC (even though this actually reduces * the numeric value of the field itself). * * @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); #ifndef 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. * <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); #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. * <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); #ifndef U_FORCE_HIDE_DEPRECATED_API /** * 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. * <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); #endif // U_FORCE_HIDE_DEPRECATED_API /** * 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. * <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); #ifndef U_FORCE_HIDE_DEPRECATED_API /** * 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); #endif // U_FORCE_HIDE_DEPRECATED_API /** * 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 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 (America/New_York) occurs twice; * 1:30 AM EDT, then 1:30 AM EST one hour later. When <code>UCAL_WALLTIME_FIRST</code> * is used, the wall time 1:30AM in this example will be interpreted as 1:30 AM EDT * (first occurrence). When <code>UCAL_WALLTIME_LAST</code> is used, it will be * interpreted as 1:30 AM EST (last occurrence). The default value is * <code>UCAL_WALLTIME_LAST</code>. * <p> * <b>Note:</b>When <code>UCAL_WALLTIME_NEXT_VALID</code> is not a valid * option for this. When the argument is neither <code>UCAL_WALLTIME_FIRST</code> * nor <code>UCAL_WALLTIME_LAST</code>, this method has no effect and will keep * the current setting. * * @param option the behavior for handling repeating wall time, either * <code>UCAL_WALLTIME_FIRST</code> or <code>UCAL_WALLTIME_LAST</code>. * @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 * <code>UCAL_WALLTIME_FIRST</code> or <code>UCAL_WALLTIME_LAST</code>. * @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 * <code>UCAL_WALLTIME_FIRST</code> 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 <code>UCAL_WALLTIME_LAST</code> * 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 <code>UCAL_WALLTIME_NEXT_VALID</code> is used, 2:30 AM will * be resolved as next valid wall time, that is 3:00 AM EDT. The default value is * <code>UCAL_WALLTIME_LAST</code>. * <p> * <b>Note:</b>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 <code>UCAL_WALLTIME_FIRST</code>, <code>UCAL_WALLTIME_LAST</code> and * <code>UCAL_WALLTIME_NEXT_VALID</code>. * @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 * <code>UCAL_WALLTIME_FIRST</code>, <code>UCAL_WALLTIME_LAST</code> * and <code>UCAL_WALLTIME_NEXT_VALID</code>. * @see #setSkippedWallTimeOption * @stable ICU 49 */ UCalendarWallTimeOption getSkippedWallTimeOption(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. * @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; #ifndef U_FORCE_HIDE_DEPRECATED_API /** * 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; #endif // U_FORCE_HIDE_DEPRECATED_API /** * 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; #ifndef U_FORCE_HIDE_DEPRECATED_API /** * 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; #endif // U_FORCE_HIDE_DEPRECATED_API /** * 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; #ifndef U_FORCE_HIDE_DEPRECATED_API /** * 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; #endif // U_FORCE_HIDE_DEPRECATED_API /** * 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; #ifndef U_FORCE_HIDE_DEPRECATED_API /** * 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; #endif // U_FORCE_HIDE_DEPRECATED_API /** * 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; /** * 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. * @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. * @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. * @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. * @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 override = 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: * * <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 * @return the extended year, UCAL_EXTENDED_YEAR * @internal */ virtual int32_t handleGetExtendedYearFromWeekFields(int32_t yearWoy, int32_t woy); /** * 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()`. * @internal */ virtual void validateField(UCalendarDateFields field, UErrorCode &status); #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 */ double 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, double 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; /** * Marker for end of resolve set (row or group). Value for field resolution tables. * * @see #resolveFields * @internal */ static constexpr int32_t 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. * Value for field resolution tables. * * @see #resolveFields * @internal */ static constexpr int32_t 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); #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 (private) */ 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]; #ifndef U_FORCE_HIDE_DEPRECATED_API /** * 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]; #endif // U_FORCE_HIDE_DEPRECATED_API /** 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); #ifndef U_HIDE_INTERNAL_API /** * 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; } #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. * <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); #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. * <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(); #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. Always set; never NULL. */ TimeZone* fZone; /** * Option for repeated 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. * * <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&) */ void validateFields(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&)}. */ 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 * * Because ICU may choose to cache Calendars internally, this must * be called at application startup, prior to any calls to * Calendar::createInstance to avoid undefined behavior. * * @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 * * Because ICU may choose to cache Calendars internally, this should * be called during application shutdown, after all calls to * Calendar::createInstance to avoid undefined behavior. * * @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; /** * @return The related Gregorian year; will be obtained by modifying the value * obtained by get from UCAL_EXTENDED_YEAR field * @internal */ virtual int32_t getRelatedYear(UErrorCode &status) const; /** * @param year The related Gregorian year to set; will be modified as necessary then * set in UCAL_EXTENDED_YEAR field * @internal */ virtual void setRelatedYear(int32_t year); #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; /** * Find the previous zone transition near the given time. * @param base The base time, inclusive * @param transitionTime Receives the result time * @param status The error status * @return true if a transition is found. */ UBool getImmediatePreviousZoneTransition(UDate base, UDate *transitionTime, UErrorCode& status) const; public: #ifndef U_HIDE_INTERNAL_API /** * Creates a new Calendar from a Locale for the cache. * This method does not set the time or timezone in returned calendar. * @param locale the locale. * @param status any error returned here. * @return the new Calendar object with no time or timezone set. * @internal For ICU use only. */ static Calendar * U_EXPORT2 makeInstance( const Locale &locale, UErrorCode &status); /** * Get the calendar type for given locale. * @param locale the locale * @param typeBuffer calendar type returned here * @param typeBufferSize The size of typeBuffer in bytes. If the type * can't fit in the buffer, this method sets status to * U_BUFFER_OVERFLOW_ERROR * @param status error, if any, returned here. * @internal For ICU use only. */ static void U_EXPORT2 getCalendarTypeFromLocale( const Locale &locale, char *typeBuffer, int32_t typeBufferSize, UErrorCode &status); #endif /* U_HIDE_INTERNAL_API */ }; // ------------------------------------- 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 /* U_HIDE_DEPRECATED_API */ // ------------------------------------- /** * 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_HIDE_INTERNAL_API */ U_NAMESPACE_END #endif /* #if !UCONFIG_NO_FORMATTING */ #endif /* U_SHOW_CPLUSPLUS_API */ #endif // _CALENDAR
