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
+ * `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.)
+ * for information about the `UDate` class.)
*
- *
- * Subclasses of Calendar interpret a UDate
+ * 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 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. + * **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
+ * Like other locale-sensitive classes, `Calendar` provides a
+ * static method, `createInstance`, for getting a generally useful
+ * object of this type. `Calendar`'s `createInstance` method
+ * returns the appropriate `Calendar` subclass whose
* time fields have been initialized with the current date and time:
- * \htmlonly
\endhtmlonly - *\endhtmlonly * - *- * Calendar *rightNow = Calendar::createInstance(errCode); - *- * \htmlonly
- * A Calendar object can produce all the time field values
+ * 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, two special circumstances
+ * 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),
- * or there may be inconsistent information (such as "Tuesday, July 15, 1996"
- * -- July 15, 1996 is actually a Monday).
+ * `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 + * **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 + * **Inconsistent information.** If fields conflict, the calendar * will give preference to fields set more recently. For example, when * determining the day, the calendar will look for one of the following * combinations of fields. The most recent combination, as determined by the * most recently set single field, will be used. * - * \htmlonly
\endhtmlonly - *\endhtmlonly + * 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: * - * \htmlonly- * MONTH + DAY_OF_MONTH - * MONTH + WEEK_OF_MONTH + DAY_OF_WEEK - * MONTH + DAY_OF_WEEK_IN_MONTH + DAY_OF_WEEK - * DAY_OF_YEAR - * DAY_OF_WEEK + WEEK_OF_YEAR - *- * \htmlonly
\endhtmlonly - *\endhtmlonly + * HOUR_OF_DAY + * AM_PM + HOUR * - *- * HOUR_OF_DAY - * AM_PM + HOUR - *- * \htmlonly
- * Note: for some non-Gregorian calendars, different + * **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 historial Arabic astronomical calendar requires year, - * month, day-of-month and day-of-week in some cases. + * 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 + * **Note:** There are certain possible ambiguities in * interpretation of certain singular times, which are resolved in the * following ways: - *
* The date or time format strings are not part of the definition of a * calendar, as those must be modifiable or overridable by the user at - * runtime. Use {@link DateFormat} - * to format dates. + * runtime. Use `DateFormat` to format dates. * - *
- * Calendar provides an API for field "rolling", where fields
+ * `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.
+ * month up in the date December 12, **1996** results in
+ * January 12, **1996**.
*
- *
- * Calendar also provides a date arithmetic function for
+ * `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.
+ * 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.
+ *
+ *
+ * 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: + *
ICU_ENABLE_TENTATIVE_ERA=true.* NOTE: Do not use this method -- use roll(EDateFields, int, UErrorCode&) instead. * @@ -564,6 +601,7 @@ public: * @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 @@ -573,10 +611,19 @@ public: * 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. + * 02/29/96. Rolling up always means rolling forward in time (unless the limit of the + * field is reached, in which case it may pin or wrap), so for Gregorian calendar, + * starting with 100 BC and rolling the year up results in 99 BC. + * When eras have a definite beginning and end (as in the Chinese calendar, or as in + * most eras in the Japanese calendar) then rolling the year past either limit of the + * era will cause the year to wrap around. When eras only have a limit at one end, + * then attempting to roll the year past that limit will result in pinning the year + * at that limit. Note that for most calendars in which era 0 years move forward in + * time (such as Buddhist, Hebrew, or Islamic), it is possible for add or roll to + * result in negative years for era 0 (that is the only way to represent years before + * the calendar epoch). + * When rolling on the hour-in-day or Calendar::HOUR_OF_DAY field, it will roll the + * hour value in the range between 0 and 23, which is zero-based. *
* NOTE: Do not use this method -- use roll(UCalendarDateFields, int, UErrorCode&) instead. * @@ -590,16 +637,26 @@ public: */ 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; - * 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. + * 02/29/96. Rolling by a positive value always means rolling forward in time (unless + * the limit of the field is reached, in which case it may pin or wrap), so for + * Gregorian calendar, starting with 100 BC and rolling the year by + 1 results in 99 BC. + * When eras have a definite beginning and end (as in the Chinese calendar, or as in + * most eras in the Japanese calendar) then rolling the year past either limit of the + * era will cause the year to wrap around. When eras only have a limit at one end, + * then attempting to roll the year past that limit will result in pinning the year + * at that limit. Note that for most calendars in which era 0 years move forward in + * time (such as Buddhist, Hebrew, or Islamic), it is possible for add or roll to + * result in negative years for era 0 (that is the only way to represent years before + * the calendar epoch). + * When rolling on the hour-in-day or Calendar::HOUR_OF_DAY field, it will roll the + * hour value in the range between 0 and 23, which is zero-based. *
* The only difference between roll() and add() is that roll() does not change * the value of more significant fields when it reaches the minimum or maximum @@ -613,6 +670,7 @@ public: * @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 @@ -620,10 +678,19 @@ public: * 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. + * 02/29/96. Rolling by a positive value always means rolling forward in time (unless + * the limit of the field is reached, in which case it may pin or wrap), so for + * Gregorian calendar, starting with 100 BC and rolling the year by + 1 results in 99 BC. + * When eras have a definite beginning and end (as in the Chinese calendar, or as in + * most eras in the Japanese calendar) then rolling the year past either limit of the + * era will cause the year to wrap around. When eras only have a limit at one end, + * then attempting to roll the year past that limit will result in pinning the year + * at that limit. Note that for most calendars in which era 0 years move forward in + * time (such as Buddhist, Hebrew, or Islamic), it is possible for add or roll to + * result in negative years for era 0 (that is the only way to represent years before + * the calendar epoch). + * When rolling on the hour-in-day or Calendar::HOUR_OF_DAY field, it will roll the + * hour value in the range between 0 and 23, which is zero-based. *
* The only difference between roll() and add() is that roll() does not change
* the value of more significant fields when it reaches the minimum or maximum
@@ -638,6 +705,7 @@ public:
*/
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
@@ -694,6 +762,7 @@ public:
* @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
@@ -823,6 +892,75 @@ public:
*/
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 UCAL_WALLTIME_FIRST
+ * is used, the wall time 1:30AM in this example will be interpreted as 1:30 AM EDT
+ * (first occurrence). When UCAL_WALLTIME_LAST is used, it will be
+ * interpreted as 1:30 AM EST (last occurrence). The default value is
+ * UCAL_WALLTIME_LAST.
+ *
+ * Note:When UCAL_WALLTIME_NEXT_VALID is not a valid
+ * option for this. When the argument is neither UCAL_WALLTIME_FIRST
+ * nor UCAL_WALLTIME_LAST, this method has no effect and will keep
+ * the current setting.
+ *
+ * @param option the behavior for handling repeating wall time, either
+ * UCAL_WALLTIME_FIRST or UCAL_WALLTIME_LAST.
+ * @see #getRepeatedWallTimeOption
+ * @stable ICU 49
+ */
+ void setRepeatedWallTimeOption(UCalendarWallTimeOption option);
+
+ /**
+ * Gets the behavior for handling wall time repeating multiple times
+ * at negative time zone offset transitions.
+ *
+ * @return the behavior for handling repeating wall time, either
+ * UCAL_WALLTIME_FIRST or UCAL_WALLTIME_LAST.
+ * @see #setRepeatedWallTimeOption
+ * @stable ICU 49
+ */
+ UCalendarWallTimeOption getRepeatedWallTimeOption(void) const;
+
+ /**
+ * Sets the behavior for handling skipped wall time at positive time zone offset
+ * transitions. For example, 2:30 AM on March 13, 2011 in US Eastern time (America/New_York)
+ * does not exist because the wall time jump from 1:59 AM EST to 3:00 AM EDT. When
+ * UCAL_WALLTIME_FIRST is used, 2:30 AM is interpreted as 30 minutes before 3:00 AM
+ * EDT, therefore, it will be resolved as 1:30 AM EST. When UCAL_WALLTIME_LAST
+ * is used, 2:30 AM is interpreted as 31 minutes after 1:59 AM EST, therefore, it will be
+ * resolved as 3:30 AM EDT. When UCAL_WALLTIME_NEXT_VALID is used, 2:30 AM will
+ * be resolved as next valid wall time, that is 3:00 AM EDT. The default value is
+ * UCAL_WALLTIME_LAST.
+ *
+ * Note:This option is effective only when this calendar is lenient.
+ * When the calendar is strict, such non-existing wall time will cause an error.
+ *
+ * @param option the behavior for handling skipped wall time at positive time zone
+ * offset transitions, one of UCAL_WALLTIME_FIRST, UCAL_WALLTIME_LAST and
+ * UCAL_WALLTIME_NEXT_VALID.
+ * @see #getSkippedWallTimeOption
+ *
+ * @stable ICU 49
+ */
+ void setSkippedWallTimeOption(UCalendarWallTimeOption option);
+
+ /**
+ * Gets the behavior for handling skipped wall time at positive time zone offset
+ * transitions.
+ *
+ * @return the behavior for handling skipped wall time, one of
+ * UCAL_WALLTIME_FIRST, UCAL_WALLTIME_LAST
+ * and UCAL_WALLTIME_NEXT_VALID.
+ * @see #setSkippedWallTimeOption
+ * @stable ICU 49
+ */
+ UCalendarWallTimeOption getSkippedWallTimeOption(void) const;
+
+#ifndef U_HIDE_DEPRECATED_API
/**
* Sets what the first day of the week is; e.g., Sunday in US, Monday in France.
*
@@ -830,6 +968,7 @@ public:
* @deprecated ICU 2.6. Use setFirstDayOfWeek(UCalendarDaysOfWeek value) instead.
*/
void setFirstDayOfWeek(EDaysOfWeek value);
+#endif /* U_HIDE_DEPRECATED_API */
/**
* Sets what the first day of the week is; e.g., Sunday in US, Monday in France.
@@ -839,6 +978,7 @@ public:
*/
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.
*
@@ -846,6 +986,7 @@ public:
* @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.
@@ -878,6 +1019,7 @@ public:
*/
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.
@@ -887,6 +1029,7 @@ public:
* @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
@@ -898,6 +1041,7 @@ public:
*/
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.
@@ -907,6 +1051,7 @@ public:
* @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,
@@ -918,6 +1063,7 @@ public:
*/
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.
@@ -927,6 +1073,7 @@ public:
* @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
@@ -938,6 +1085,7 @@ public:
*/
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.
@@ -947,6 +1095,7 @@ public:
* @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
@@ -958,6 +1107,7 @@ public:
*/
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().
@@ -973,6 +1123,7 @@ public:
* @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.
@@ -990,6 +1141,7 @@ public:
*/
virtual int32_t getActualMinimum(UCalendarDateFields field, UErrorCode& status) const;
+#ifndef U_HIDE_DEPRECATED_API
/**
* Return the maximum value that this field could have, given the current date.
* For example, with the date "Feb 3, 1997" and the DAY_OF_MONTH field, the actual
@@ -1007,6 +1159,7 @@ public:
* @deprecated ICU 2.6. Use getActualMaximum(UCalendarDateFields field, UErrorCode& status) instead.
*/
int32_t getActualMaximum(EDateFields field, UErrorCode& status) const;
+#endif /* U_HIDE_DEPRECATED_API */
/**
* Return the maximum value that this field could have, given the current date.
@@ -1026,6 +1179,7 @@ public:
*/
virtual int32_t getActualMaximum(UCalendarDateFields field, UErrorCode& status) const;
+#ifndef U_HIDE_DEPRECATED_API
/**
* Gets the value for a given time field. Recalculate the current time field values
* if the time value has been changed by a call to setTime(). Return zero for unset
@@ -1040,6 +1194,7 @@ public:
* @deprecated ICU 2.6. Use get(UCalendarDateFields field, UErrorCode& status) instead.
*/
int32_t get(EDateFields field, UErrorCode& status) const;
+#endif /* U_HIDE_DEPRECATED_API */
/**
* Gets the value for a given time field. Recalculate the current time field values
@@ -1056,6 +1211,7 @@ public:
*/
int32_t get(UCalendarDateFields field, UErrorCode& status) const;
+#ifndef U_HIDE_DEPRECATED_API
/**
* Determines if the given time field has a value set. This can affect in the
* resolving of time in Calendar. Unset fields have a value of zero, by definition.
@@ -1065,6 +1221,7 @@ public:
* @deprecated ICU 2.6. Use isSet(UCalendarDateFields field) instead.
*/
UBool isSet(EDateFields field) const;
+#endif /* U_HIDE_DEPRECATED_API */
/**
* Determines if the given time field has a value set. This can affect in the
@@ -1076,6 +1233,7 @@ public:
*/
UBool isSet(UCalendarDateFields field) const;
+#ifndef U_HIDE_DEPRECATED_API
/**
* Sets the given time field with the given value.
*
@@ -1084,6 +1242,7 @@ public:
* @deprecated ICU 2.6. Use set(UCalendarDateFields field, int32_t value) instead.
*/
void set(EDateFields field, int32_t value);
+#endif /* U_HIDE_DEPRECATED_API */
/**
* Sets the given time field with the given value.
@@ -1137,12 +1296,22 @@ public:
/**
* 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.
+ * them a value of zero (except for era in some cases, see below). The field values
+ * will be determined during the next resolving of time into time fields.
+ *
+ * This effectively results in the following:
+ * 1. Gregorian-like calendars (gregorian, iso8601, japanese, buddhist, roc) are set
+ * to a UDate value of 0, corresponding to the epoch date of gregorian
+ * January 1, 1970 CE at UTC 00:00:00.
+ * 2. Other calendars are set to the beginning of the first day of the first month of
+ * the current era. Note that for the chinese and dangi calendars, the era
+ * corresponds to the current 60-year stem-branch cycle, so there is a new era
+ * every 60 years. The current era began on gregorian February 2, 1984.
* @stable ICU 2.0
*/
void clear(void);
+#ifndef U_HIDE_DEPRECATED_API
/**
* Clears the value in the given time field, both making it unset and assigning it a
* value of zero. This field value will be determined during the next resolving of
@@ -1152,6 +1321,7 @@ public:
* @deprecated ICU 2.6. Use clear(UCalendarDateFields field) instead.
*/
void clear(EDateFields field);
+#endif /* U_HIDE_DEPRECATED_API */
/**
* Clears the value in the given time field, both making it unset and assigning it a
@@ -1181,19 +1351,44 @@ public:
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
+ * 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,
- * in this calendar system. If a transition occurs at midnight,
+ * 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
@@ -1209,7 +1404,7 @@ public:
/**
* Returns the time during the day at which the weekend begins or ends in
- * this calendar system. If getDayOfWeekType() rerturns UCAL_WEEKEND_ONSET
+ * 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
@@ -1349,6 +1544,7 @@ protected:
*/
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.
@@ -1358,7 +1554,9 @@ protected:
* @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,
@@ -1380,7 +1578,9 @@ protected:
* @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
@@ -1391,6 +1591,7 @@ protected:
* @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
@@ -1416,11 +1617,13 @@ protected:
* @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 */
};
/**
@@ -1516,11 +1719,20 @@ protected:
* (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
+ * @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.
@@ -1536,7 +1748,7 @@ protected:
* reflects local zone wall time.
* @internal
*/
- int32_t computeMillisInDay();
+ double computeMillisInDay();
/**
* This method can assume EXTENDED_YEAR has been set.
@@ -1547,7 +1759,7 @@ protected:
* when this function fails.
* @internal
*/
- int32_t computeZoneOffset(double millis, int32_t millisInDay, UErrorCode &ec);
+ int32_t computeZoneOffset(double millis, double millisInDay, UErrorCode &ec);
/**
@@ -1621,6 +1833,7 @@ protected:
* @internal
*/
UCalendarDateFields resolveFields(const UFieldResolutionTable *precedenceTable);
+#endif /* U_HIDE_INTERNAL_API */
/**
@@ -1628,12 +1841,14 @@ protected:
*/
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:
@@ -1706,11 +1921,13 @@ protected:
*/
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
@@ -1755,6 +1972,7 @@ protected:
*/
virtual void handleComputeFields(int32_t julianDay, UErrorCode &status);
+#ifndef U_HIDE_INTERNAL_API
/**
* Return the extended year on the Gregorian calendar as computed by
* computeGregorianFields().
@@ -1790,6 +2008,7 @@ protected:
int32_t getGregorianDayOfMonth() const {
return fGregorianDayOfMonth;
}
+#endif /* U_HIDE_INTERNAL_API */
/**
* Called by computeJulianDay. Returns the default month (0-based) for the year,
@@ -1891,6 +2110,7 @@ protected:
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
@@ -1928,6 +2148,7 @@ protected:
* @internal
*/
int32_t getLocalDOW();
+#endif /* U_HIDE_INTERNAL_API */
private:
@@ -1936,6 +2157,12 @@ private:
*/
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.
*/
@@ -1948,10 +2175,22 @@ private:
/**
* Time zone affects the time calculation done by Calendar. Calendar subclasses use
- * the time zone data to produce the local time.
+ * 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
@@ -2070,31 +2309,20 @@ private:
* should only be called if this calendar is not lenient.
* @see #isLenient
* @see #validateField(int, int&)
- * @internal
*/
void validateFields(UErrorCode &status);
- /**
- * Validate a single field of this calendar. Subclasses should
- * override this method to validate any calendar-specific fields.
- * Generic fields can be handled by
- * Calendar.validateField().
- * @see #validateField(int, int, int, int&)
- * @internal
- */
- virtual void validateField(UCalendarDateFields field, UErrorCode &status);
-
/**
* Validate a single field of this calendar given its minimum and
* maximum allowed value. If the field is out of range,
* U_ILLEGAL_ARGUMENT_ERROR will be set. Subclasses may
* use this method in their implementation of {@link
* #validateField(int, int&)}.
- * @internal
*/
void validateField(UCalendarDateFields field, int32_t min, int32_t max, UErrorCode& status);
protected:
+#ifndef U_HIDE_INTERNAL_API
/**
* Convert a quasi Julian date to the day of the week. The Julian date used here is
* not a true Julian date, since it is measured from midnight, not noon. Return
@@ -2105,6 +2333,7 @@ private:
* @internal
*/
static uint8_t julianDayToDayOfWeek(double julian);
+#endif /* U_HIDE_INTERNAL_API */
private:
char validLocale[ULOC_FULLNAME_CAPACITY];
@@ -2116,6 +2345,7 @@ private:
* 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.
@@ -2127,6 +2357,11 @@ private:
/**
* 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
@@ -2139,12 +2374,18 @@ private:
* 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
@@ -2166,19 +2407,19 @@ private:
#endif /* !UCONFIG_NO_SERVICE */
/**
- * @internal
* @return TRUE if this calendar has a default century (i.e. 03 -> 2003)
+ * @internal
*/
virtual UBool haveDefaultCentury() const = 0;
/**
- * @internal
* @return the start of the default century, as a UDate
+ * @internal
*/
virtual UDate defaultCenturyStart() const = 0;
/**
- * @internal
* @return the beginning year of the default century, as a year
+ * @internal
*/
virtual int32_t defaultCenturyStartYear() const = 0;
@@ -2190,6 +2431,21 @@ private:
*/
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
@@ -2197,7 +2453,53 @@ private:
* @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 */
};
// -------------------------------------
@@ -2217,11 +2519,13 @@ 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 */
// -------------------------------------
@@ -2239,14 +2543,18 @@ Calendar::internalSet(UCalendarDateFields field, int32_t value)
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