SimpleTimeZone is a concrete subclass of TimeZone
+ * that represents a time zone for use with a Gregorian calendar. This
+ * class does not handle historical changes.
+ *
+ * When specifying daylight-savings-time begin and end dates, use a negative value for
+ * dayOfWeekInMonth to indicate that SimpleTimeZone should
+ * count from the end of the month backwards. For example, if Daylight Savings
+ * Time starts or ends at the last Sunday a month, use dayOfWeekInMonth = -1
+ * along with dayOfWeek = UCAL_SUNDAY to specify the rule.
+ *
+ * @see Calendar
+ * @see GregorianCalendar
+ * @see TimeZone
+ * @author D. Goldsmith, Mark Davis, Chen-Lieh Huang, Alan Liu
+ */
+class U_I18N_API SimpleTimeZone: public BasicTimeZone {
+public:
+
+ /**
+ * TimeMode is used, together with a millisecond offset after
+ * midnight, to specify a rule transition time. Most rules
+ * transition at a local wall time, that is, according to the
+ * current time in effect, either standard, or DST. However, some
+ * rules transition at local standard time, and some at a specific
+ * UTC time. Although it might seem that all times could be
+ * converted to wall time, thus eliminating the need for this
+ * parameter, this is not the case.
+ * @stable ICU 2.0
+ */
+ enum TimeMode {
+ WALL_TIME = 0,
+ STANDARD_TIME,
+ UTC_TIME
+ };
+
+ /**
+ * Copy constructor
+ * @param source the object to be copied.
+ * @stable ICU 2.0
+ */
+ SimpleTimeZone(const SimpleTimeZone& source);
+
+ /**
+ * Default assignment operator
+ * @param right the object to be copied.
+ * @stable ICU 2.0
+ */
+ SimpleTimeZone& operator=(const SimpleTimeZone& right);
+
+ /**
+ * Destructor
+ * @stable ICU 2.0
+ */
+ virtual ~SimpleTimeZone();
+
+ /**
+ * Returns true if the two TimeZone objects are equal; that is, they have
+ * the same ID, raw GMT offset, and DST rules.
+ *
+ * @param that The SimpleTimeZone object to be compared with.
+ * @return True if the given time zone is equal to this time zone; false
+ * otherwise.
+ * @stable ICU 2.0
+ */
+ virtual UBool operator==(const TimeZone& that) const;
+
+ /**
+ * Constructs a SimpleTimeZone with the given raw GMT offset and time zone ID,
+ * and which doesn't observe daylight savings time. Normally you should use
+ * TimeZone::createInstance() to create a TimeZone instead of creating a
+ * SimpleTimeZone directly with this constructor.
+ *
+ * @param rawOffsetGMT The given base time zone offset to GMT.
+ * @param ID The timezone ID which is obtained from
+ * TimeZone.getAvailableIDs.
+ * @stable ICU 2.0
+ */
+ SimpleTimeZone(int32_t rawOffsetGMT, const UnicodeString& ID);
+
+ /**
+ * Construct a SimpleTimeZone with the given raw GMT offset, time zone ID,
+ * and times to start and end daylight savings time. To create a TimeZone that
+ * doesn't observe daylight savings time, don't use this constructor; use
+ * SimpleTimeZone(rawOffset, ID) instead. Normally, you should use
+ * TimeZone.createInstance() to create a TimeZone instead of creating a
+ * SimpleTimeZone directly with this constructor.
+ *
+ * Various types of daylight-savings time rules can be specfied by using different + * values for startDay and startDayOfWeek and endDay and endDayOfWeek. For a + * complete explanation of how these parameters work, see the documentation for + * setStartRule(). + * + * @param rawOffsetGMT The new SimpleTimeZone's raw GMT offset + * @param ID The new SimpleTimeZone's time zone ID. + * @param savingsStartMonth The daylight savings starting month. Month is + * 0-based. eg, 0 for January. + * @param savingsStartDayOfWeekInMonth The daylight savings starting + * day-of-week-in-month. See setStartRule() for a + * complete explanation. + * @param savingsStartDayOfWeek The daylight savings starting day-of-week. + * See setStartRule() for a complete explanation. + * @param savingsStartTime The daylight savings starting time, expressed as the + * number of milliseconds after midnight. + * @param savingsEndMonth The daylight savings ending month. Month is + * 0-based. eg, 0 for January. + * @param savingsEndDayOfWeekInMonth The daylight savings ending day-of-week-in-month. + * See setStartRule() for a complete explanation. + * @param savingsEndDayOfWeek The daylight savings ending day-of-week. + * See setStartRule() for a complete explanation. + * @param savingsEndTime The daylight savings ending time, expressed as the + * number of milliseconds after midnight. + * @param status An UErrorCode to receive the status. + * @stable ICU 2.0 + */ + SimpleTimeZone(int32_t rawOffsetGMT, const UnicodeString& ID, + int8_t savingsStartMonth, int8_t savingsStartDayOfWeekInMonth, + int8_t savingsStartDayOfWeek, int32_t savingsStartTime, + int8_t savingsEndMonth, int8_t savingsEndDayOfWeekInMonth, + int8_t savingsEndDayOfWeek, int32_t savingsEndTime, + UErrorCode& status); + /** + * Construct a SimpleTimeZone with the given raw GMT offset, time zone ID, + * and times to start and end daylight savings time. To create a TimeZone that + * doesn't observe daylight savings time, don't use this constructor; use + * SimpleTimeZone(rawOffset, ID) instead. Normally, you should use + * TimeZone.createInstance() to create a TimeZone instead of creating a + * SimpleTimeZone directly with this constructor. + *
+ * Various types of daylight-savings time rules can be specfied by using different + * values for startDay and startDayOfWeek and endDay and endDayOfWeek. For a + * complete explanation of how these parameters work, see the documentation for + * setStartRule(). + * + * @param rawOffsetGMT The new SimpleTimeZone's raw GMT offset + * @param ID The new SimpleTimeZone's time zone ID. + * @param savingsStartMonth The daylight savings starting month. Month is + * 0-based. eg, 0 for January. + * @param savingsStartDayOfWeekInMonth The daylight savings starting + * day-of-week-in-month. See setStartRule() for a + * complete explanation. + * @param savingsStartDayOfWeek The daylight savings starting day-of-week. + * See setStartRule() for a complete explanation. + * @param savingsStartTime The daylight savings starting time, expressed as the + * number of milliseconds after midnight. + * @param savingsEndMonth The daylight savings ending month. Month is + * 0-based. eg, 0 for January. + * @param savingsEndDayOfWeekInMonth The daylight savings ending day-of-week-in-month. + * See setStartRule() for a complete explanation. + * @param savingsEndDayOfWeek The daylight savings ending day-of-week. + * See setStartRule() for a complete explanation. + * @param savingsEndTime The daylight savings ending time, expressed as the + * number of milliseconds after midnight. + * @param savingsDST The number of milliseconds added to standard time + * to get DST time. Default is one hour. + * @param status An UErrorCode to receive the status. + * @stable ICU 2.0 + */ + SimpleTimeZone(int32_t rawOffsetGMT, const UnicodeString& ID, + int8_t savingsStartMonth, int8_t savingsStartDayOfWeekInMonth, + int8_t savingsStartDayOfWeek, int32_t savingsStartTime, + int8_t savingsEndMonth, int8_t savingsEndDayOfWeekInMonth, + int8_t savingsEndDayOfWeek, int32_t savingsEndTime, + int32_t savingsDST, UErrorCode& status); + + /** + * Construct a SimpleTimeZone with the given raw GMT offset, time zone ID, + * and times to start and end daylight savings time. To create a TimeZone that + * doesn't observe daylight savings time, don't use this constructor; use + * SimpleTimeZone(rawOffset, ID) instead. Normally, you should use + * TimeZone.createInstance() to create a TimeZone instead of creating a + * SimpleTimeZone directly with this constructor. + *
+ * Various types of daylight-savings time rules can be specfied by using different + * values for startDay and startDayOfWeek and endDay and endDayOfWeek. For a + * complete explanation of how these parameters work, see the documentation for + * setStartRule(). + * + * @param rawOffsetGMT The new SimpleTimeZone's raw GMT offset + * @param ID The new SimpleTimeZone's time zone ID. + * @param savingsStartMonth The daylight savings starting month. Month is + * 0-based. eg, 0 for January. + * @param savingsStartDayOfWeekInMonth The daylight savings starting + * day-of-week-in-month. See setStartRule() for a + * complete explanation. + * @param savingsStartDayOfWeek The daylight savings starting day-of-week. + * See setStartRule() for a complete explanation. + * @param savingsStartTime The daylight savings starting time, expressed as the + * number of milliseconds after midnight. + * @param savingsStartTimeMode Whether the start time is local wall time, local + * standard time, or UTC time. Default is local wall time. + * @param savingsEndMonth The daylight savings ending month. Month is + * 0-based. eg, 0 for January. + * @param savingsEndDayOfWeekInMonth The daylight savings ending day-of-week-in-month. + * See setStartRule() for a complete explanation. + * @param savingsEndDayOfWeek The daylight savings ending day-of-week. + * See setStartRule() for a complete explanation. + * @param savingsEndTime The daylight savings ending time, expressed as the + * number of milliseconds after midnight. + * @param savingsEndTimeMode Whether the end time is local wall time, local + * standard time, or UTC time. Default is local wall time. + * @param savingsDST The number of milliseconds added to standard time + * to get DST time. Default is one hour. + * @param status An UErrorCode to receive the status. + * @stable ICU 2.0 + */ + SimpleTimeZone(int32_t rawOffsetGMT, const UnicodeString& ID, + int8_t savingsStartMonth, int8_t savingsStartDayOfWeekInMonth, + int8_t savingsStartDayOfWeek, int32_t savingsStartTime, + TimeMode savingsStartTimeMode, + int8_t savingsEndMonth, int8_t savingsEndDayOfWeekInMonth, + int8_t savingsEndDayOfWeek, int32_t savingsEndTime, TimeMode savingsEndTimeMode, + int32_t savingsDST, UErrorCode& status); + + /** + * Sets the daylight savings starting year, that is, the year this time zone began + * observing its specified daylight savings time rules. The time zone is considered + * not to observe daylight savings time prior to that year; SimpleTimeZone doesn't + * support historical daylight-savings-time rules. + * @param year the daylight savings starting year. + * @stable ICU 2.0 + */ + void setStartYear(int32_t year); + + /** + * Sets the daylight savings starting rule. For example, in the U.S., Daylight Savings + * Time starts at the second Sunday in March, at 2 AM in standard time. + * Therefore, you can set the start rule by calling: + * setStartRule(UCAL_MARCH, 2, UCAL_SUNDAY, 2*60*60*1000); + * The dayOfWeekInMonth and dayOfWeek parameters together specify how to calculate + * the exact starting date. Their exact meaning depend on their respective signs, + * allowing various types of rules to be constructed, as follows: + *
+ * setEndRule(UCAL_OCTOBER, -1, UCAL_SUNDAY, 2*60*60*1000); + *+ * Various other types of rules can be specified by manipulating the dayOfWeek + * and dayOfWeekInMonth parameters. For complete details, see the documentation + * for setStartRule(). + * + * @param month the daylight savings ending month. Month is 0-based. + * eg, 0 for January. + * @param dayOfWeekInMonth the daylight savings ending + * day-of-week-in-month. See setStartRule() for a complete explanation. + * @param dayOfWeek the daylight savings ending day-of-week. See setStartRule() + * for a complete explanation. + * @param time the daylight savings ending time. Please see the member + * description for an example. + * @param status An UErrorCode + * @stable ICU 2.0 + */ + void setEndRule(int32_t month, int32_t dayOfWeekInMonth, int32_t dayOfWeek, + int32_t time, UErrorCode& status); + + /** + * Sets the daylight savings ending rule. For example, if Daylight + * Savings Time ends at the last (-1) Sunday in October, at 2 AM in standard time. + * Therefore, you can set the end rule by calling: + *
+ * setEndRule(UCAL_OCTOBER, -1, UCAL_SUNDAY, 2*60*60*1000); + *+ * Various other types of rules can be specified by manipulating the dayOfWeek + * and dayOfWeekInMonth parameters. For complete details, see the documentation + * for setStartRule(). + * + * @param month the daylight savings ending month. Month is 0-based. + * eg, 0 for January. + * @param dayOfWeekInMonth the daylight savings ending + * day-of-week-in-month. See setStartRule() for a complete explanation. + * @param dayOfWeek the daylight savings ending day-of-week. See setStartRule() + * for a complete explanation. + * @param time the daylight savings ending time. Please see the member + * description for an example. + * @param mode whether the time is local wall time, local standard time, + * or UTC time. Default is local wall time. + * @param status An UErrorCode + * @stable ICU 2.0 + */ + void setEndRule(int32_t month, int32_t dayOfWeekInMonth, int32_t dayOfWeek, + int32_t time, TimeMode mode, UErrorCode& status); + + /** + * Sets the DST end rule to a fixed date within a month. + * + * @param month The month in which this rule occurs (0-based). + * @param dayOfMonth The date in that month (1-based). + * @param time The time of that day (number of millis after midnight) + * when DST ends in local wall time, which is daylight + * time in this case. + * @param status An UErrorCode + * @stable ICU 2.0 + */ + void setEndRule(int32_t month, int32_t dayOfMonth, int32_t time, UErrorCode& status); + + /** + * Sets the DST end rule to a fixed date within a month. + * + * @param month The month in which this rule occurs (0-based). + * @param dayOfMonth The date in that month (1-based). + * @param time The time of that day (number of millis after midnight) + * when DST ends in local wall time, which is daylight + * time in this case. + * @param mode whether the time is local wall time, local standard time, + * or UTC time. Default is local wall time. + * @param status An UErrorCode + * @stable ICU 2.0 + */ + void setEndRule(int32_t month, int32_t dayOfMonth, int32_t time, + TimeMode mode, UErrorCode& status); + + /** + * Sets the DST end rule to a weekday before or after a give date within + * a month, e.g., the first Monday on or after the 8th. + * + * @param month The month in which this rule occurs (0-based). + * @param dayOfMonth A date within that month (1-based). + * @param dayOfWeek The day of the week on which this rule occurs. + * @param time The time of that day (number of millis after midnight) + * when DST ends in local wall time, which is daylight + * time in this case. + * @param after If true, this rule selects the first dayOfWeek on + * or after dayOfMonth. If false, this rule selects + * the last dayOfWeek on or before dayOfMonth. + * @param status An UErrorCode + * @stable ICU 2.0 + */ + void setEndRule(int32_t month, int32_t dayOfMonth, int32_t dayOfWeek, + int32_t time, UBool after, UErrorCode& status); + + /** + * Sets the DST end rule to a weekday before or after a give date within + * a month, e.g., the first Monday on or after the 8th. + * + * @param month The month in which this rule occurs (0-based). + * @param dayOfMonth A date within that month (1-based). + * @param dayOfWeek The day of the week on which this rule occurs. + * @param time The time of that day (number of millis after midnight) + * when DST ends in local wall time, which is daylight + * time in this case. + * @param mode whether the time is local wall time, local standard time, + * or UTC time. Default is local wall time. + * @param after If true, this rule selects the first dayOfWeek on + * or after dayOfMonth. If false, this rule selects + * the last dayOfWeek on or before dayOfMonth. + * @param status An UErrorCode + * @stable ICU 2.0 + */ + void setEndRule(int32_t month, int32_t dayOfMonth, int32_t dayOfWeek, + int32_t time, TimeMode mode, UBool after, UErrorCode& status); + + /** + * Returns the TimeZone's adjusted GMT offset (i.e., the number of milliseconds to add + * to GMT to get local time in this time zone, taking daylight savings time into + * account) as of a particular reference date. The reference date is used to determine + * whether daylight savings time is in effect and needs to be figured into the offset + * that is returned (in other words, what is the adjusted GMT offset in this time zone + * at this particular date and time?). For the time zones produced by createTimeZone(), + * the reference data is specified according to the Gregorian calendar, and the date + * and time fields are in GMT, NOT local time. + * + * @param era The reference date's era + * @param year The reference date's year + * @param month The reference date's month (0-based; 0 is January) + * @param day The reference date's day-in-month (1-based) + * @param dayOfWeek The reference date's day-of-week (1-based; 1 is Sunday) + * @param millis The reference date's milliseconds in day, UTT (NOT local time). + * @param status An UErrorCode to receive the status. + * @return The offset in milliseconds to add to GMT to get local time. + * @stable ICU 2.0 + */ + virtual int32_t getOffset(uint8_t era, int32_t year, int32_t month, int32_t day, + uint8_t dayOfWeek, int32_t millis, UErrorCode& status) const; + + /** + * Gets the time zone offset, for current date, modified in case of + * daylight savings. This is the offset to add *to* UTC to get local time. + * @param era the era of the given date. + * @param year the year in the given date. + * @param month the month in the given date. + * Month is 0-based. e.g., 0 for January. + * @param day the day-in-month of the given date. + * @param dayOfWeek the day-of-week of the given date. + * @param milliseconds the millis in day in standard local time. + * @param monthLength the length of the given month in days. + * @param status An UErrorCode to receive the status. + * @return the offset to add *to* GMT to get local time. + * @stable ICU 2.0 + */ + virtual int32_t getOffset(uint8_t era, int32_t year, int32_t month, int32_t day, + uint8_t dayOfWeek, int32_t milliseconds, + int32_t monthLength, UErrorCode& status) const; + /** + * Gets the time zone offset, for current date, modified in case of + * daylight savings. This is the offset to add *to* UTC to get local time. + * @param era the era of the given date. + * @param year the year in the given date. + * @param month the month in the given date. + * Month is 0-based. e.g., 0 for January. + * @param day the day-in-month of the given date. + * @param dayOfWeek the day-of-week of the given date. + * @param milliseconds the millis in day in standard local time. + * @param monthLength the length of the given month in days. + * @param prevMonthLength length of the previous month in days. + * @param status An UErrorCode to receive the status. + * @return the offset to add *to* GMT to get local time. + * @stable ICU 2.0 + */ + virtual int32_t getOffset(uint8_t era, int32_t year, int32_t month, int32_t day, + uint8_t dayOfWeek, int32_t milliseconds, + int32_t monthLength, int32_t prevMonthLength, + UErrorCode& status) const; + + /** + * Redeclared TimeZone method. This implementation simply calls + * the base class method, which otherwise would be hidden. + * @stable ICU 2.8 + */ + virtual void getOffset(UDate date, UBool local, int32_t& rawOffset, + int32_t& dstOffset, UErrorCode& ec) const; + + /** + * Get time zone offsets from local wall time. + * @internal + */ + virtual void getOffsetFromLocal(UDate date, int32_t nonExistingTimeOpt, int32_t duplicatedTimeOpt, + int32_t& rawOffset, int32_t& dstOffset, UErrorCode& status) const; + + /** + * Returns the TimeZone's raw GMT offset (i.e., the number of milliseconds to add + * to GMT to get local time, before taking daylight savings time into account). + * + * @return The TimeZone's raw GMT offset. + * @stable ICU 2.0 + */ + virtual int32_t getRawOffset(void) const; + + /** + * Sets the TimeZone's raw GMT offset (i.e., the number of milliseconds to add + * to GMT to get local time, before taking daylight savings time into account). + * + * @param offsetMillis The new raw GMT offset for this time zone. + * @stable ICU 2.0 + */ + virtual void setRawOffset(int32_t offsetMillis); + + /** + * Sets the amount of time in ms that the clock is advanced during DST. + * @param millisSavedDuringDST the number of milliseconds the time is + * advanced with respect to standard time when the daylight savings rules + * are in effect. A positive number, typically one hour (3600000). + * @param status An UErrorCode to receive the status. + * @stable ICU 2.0 + */ + void setDSTSavings(int32_t millisSavedDuringDST, UErrorCode& status); + + /** + * Returns the amount of time in ms that the clock is advanced during DST. + * @return the number of milliseconds the time is + * advanced with respect to standard time when the daylight savings rules + * are in effect. A positive number, typically one hour (3600000). + * @stable ICU 2.0 + */ + virtual int32_t getDSTSavings(void) const; + + /** + * Queries if this TimeZone uses Daylight Savings Time. + * + * @return True if this TimeZone uses Daylight Savings Time; false otherwise. + * @stable ICU 2.0 + */ + virtual UBool useDaylightTime(void) const; + + /** + * Returns true if the given date is within the period when daylight savings time + * is in effect; false otherwise. If the TimeZone doesn't observe daylight savings + * time, this functions always returns false. + * This method is wasteful since it creates a new GregorianCalendar and + * deletes it each time it is called. This is a deprecated method + * and provided only for Java compatibility. + * + * @param date The date to test. + * @param status An UErrorCode to receive the status. + * @return true if the given date is in Daylight Savings Time; + * false otherwise. + * @deprecated ICU 2.4. Use Calendar::inDaylightTime() instead. + */ + virtual UBool inDaylightTime(UDate date, UErrorCode& status) const; + + /** + * Return true if this zone has the same rules and offset as another zone. + * @param other the TimeZone object to be compared with + * @return true if the given zone has the same rules and offset as this one + * @stable ICU 2.0 + */ + UBool hasSameRules(const TimeZone& other) const; + + /** + * Clones TimeZone objects polymorphically. Clients are responsible for deleting + * the TimeZone object cloned. + * + * @return A new copy of this TimeZone object. + * @stable ICU 2.0 + */ + virtual TimeZone* clone(void) const; + + /** + * Gets the first time zone transition after the base time. + * @param base The base time. + * @param inclusive Whether the base time is inclusive or not. + * @param result Receives the first transition after the base time. + * @return TRUE if the transition is found. + * @stable ICU 3.8 + */ + virtual UBool getNextTransition(UDate base, UBool inclusive, TimeZoneTransition& result) const; + + /** + * Gets the most recent time zone transition before the base time. + * @param base The base time. + * @param inclusive Whether the base time is inclusive or not. + * @param result Receives the most recent transition before the base time. + * @return TRUE if the transition is found. + * @stable ICU 3.8 + */ + virtual UBool getPreviousTransition(UDate base, UBool inclusive, TimeZoneTransition& result) const; + + /** + * Returns the number of
TimeZoneRules which represents time transitions,
+ * for this time zone, that is, all TimeZoneRules for this time zone except
+ * InitialTimeZoneRule. The return value range is 0 or any positive value.
+ * @param status Receives error status code.
+ * @return The number of TimeZoneRules representing time transitions.
+ * @stable ICU 3.8
+ */
+ virtual int32_t countTransitionRules(UErrorCode& status) const;
+
+ /**
+ * Gets the InitialTimeZoneRule and the set of TimeZoneRule
+ * which represent time transitions for this time zone. On successful return,
+ * the argument initial points to non-NULL InitialTimeZoneRule and
+ * the array trsrules is filled with 0 or multiple TimeZoneRule
+ * instances up to the size specified by trscount. The results are referencing the
+ * rule instance held by this time zone instance. Therefore, after this time zone
+ * is destructed, they are no longer available.
+ * @param initial Receives the initial timezone rule
+ * @param trsrules Receives the timezone transition rules
+ * @param trscount On input, specify the size of the array 'transitions' receiving
+ * the timezone transition rules. On output, actual number of
+ * rules filled in the array will be set.
+ * @param status Receives error status code.
+ * @stable ICU 3.8
+ */
+ virtual void getTimeZoneRules(const InitialTimeZoneRule*& initial,
+ const TimeZoneRule* trsrules[], int32_t& trscount, UErrorCode& status) const;
+
+
+public:
+
+ /**
+ * Override TimeZone Returns a unique class ID POLYMORPHICALLY. Pure virtual
+ * override. This method is to implement a simple version of RTTI, since not all C++
+ * compilers support genuine RTTI. Polymorphic operator==() and clone() methods call
+ * this method.
+ *
+ * @return The class ID for this object. All objects of a given class have the
+ * same class ID. Objects of other classes have different class IDs.
+ * @stable ICU 2.0
+ */
+ virtual UClassID getDynamicClassID(void) const;
+
+ /**
+ * Return the class ID for this class. This is useful only for comparing to a return
+ * value from getDynamicClassID(). For example:
+ * + * . Base* polymorphic_pointer = createPolymorphicObject(); + * . if (polymorphic_pointer->getDynamicClassID() == + * . Derived::getStaticClassID()) ... + *+ * @return The class ID for all objects of this class. + * @stable ICU 2.0 + */ + static UClassID U_EXPORT2 getStaticClassID(void); + +private: + /** + * Constants specifying values of startMode and endMode. + */ + enum EMode + { + DOM_MODE = 1, + DOW_IN_MONTH_MODE, + DOW_GE_DOM_MODE, + DOW_LE_DOM_MODE + }; + + SimpleTimeZone(); // default constructor not implemented + + /** + * Internal construction method. + * @param rawOffsetGMT The new SimpleTimeZone's raw GMT offset + * @param startMonth the month DST starts + * @param startDay the day DST starts + * @param startDayOfWeek the DOW DST starts + * @param startTime the time DST starts + * @param startTimeMode Whether the start time is local wall time, local + * standard time, or UTC time. Default is local wall time. + * @param endMonth the month DST ends + * @param endDay the day DST ends + * @param endDayOfWeek the DOW DST ends + * @param endTime the time DST ends + * @param endTimeMode Whether the end time is local wall time, local + * standard time, or UTC time. Default is local wall time. + * @param dstSavings The number of milliseconds added to standard time + * to get DST time. Default is one hour. + * @param status An UErrorCode to receive the status. + */ + void construct(int32_t rawOffsetGMT, + int8_t startMonth, int8_t startDay, int8_t startDayOfWeek, + int32_t startTime, TimeMode startTimeMode, + int8_t endMonth, int8_t endDay, int8_t endDayOfWeek, + int32_t endTime, TimeMode endTimeMode, + int32_t dstSavings, UErrorCode& status); + + /** + * Compare a given date in the year to a rule. Return 1, 0, or -1, depending + * on whether the date is after, equal to, or before the rule date. The + * millis are compared directly against the ruleMillis, so any + * standard-daylight adjustments must be handled by the caller. + * + * @return 1 if the date is after the rule date, -1 if the date is before + * the rule date, or 0 if the date is equal to the rule date. + */ + static int32_t compareToRule(int8_t month, int8_t monthLen, int8_t prevMonthLen, + int8_t dayOfMonth, + int8_t dayOfWeek, int32_t millis, int32_t millisDelta, + EMode ruleMode, int8_t ruleMonth, int8_t ruleDayOfWeek, + int8_t ruleDay, int32_t ruleMillis); + + /** + * Given a set of encoded rules in startDay and startDayOfMonth, decode + * them and set the startMode appropriately. Do the same for endDay and + * endDayOfMonth. + *
+ * Upon entry, the day of week variables may be zero or + * negative, in order to indicate special modes. The day of month + * variables may also be negative. + *
+ * Upon exit, the mode variables will be + * set, and the day of week and day of month variables will be positive. + *
+ * This method also recognizes a startDay or endDay of zero as indicating + * no DST. + */ + void decodeRules(UErrorCode& status); + void decodeStartRule(UErrorCode& status); + void decodeEndRule(UErrorCode& status); + + int8_t startMonth, startDay, startDayOfWeek; // the month, day, DOW, and time DST starts + int32_t startTime; + TimeMode startTimeMode, endTimeMode; // Mode for startTime, endTime; see TimeMode + int8_t endMonth, endDay, endDayOfWeek; // the month, day, DOW, and time DST ends + int32_t endTime; + int32_t startYear; // the year these DST rules took effect + int32_t rawOffset; // the TimeZone's raw GMT offset + UBool useDaylight; // flag indicating whether this TimeZone uses DST + static const int8_t STATICMONTHLENGTH[12]; // lengths of the months + EMode startMode, endMode; // flags indicating what kind of rules the DST rules are + + /** + * A positive value indicating the amount of time saved during DST in ms. + * Typically one hour; sometimes 30 minutes. + */ + int32_t dstSavings; + + /* Private for BasicTimeZone implementation */ + void checkTransitionRules(UErrorCode& status) const; + void initTransitionRules(UErrorCode& status); + void clearTransitionRules(void); + void deleteTransitionRules(void); + UBool transitionRulesInitialized; + InitialTimeZoneRule* initialRule; + TimeZoneTransition* firstTransition; + AnnualTimeZoneRule* stdRule; + AnnualTimeZoneRule* dstRule; +}; + +inline void SimpleTimeZone::setStartRule(int32_t month, int32_t dayOfWeekInMonth, + int32_t dayOfWeek, + int32_t time, UErrorCode& status) { + setStartRule(month, dayOfWeekInMonth, dayOfWeek, time, WALL_TIME, status); +} + +inline void SimpleTimeZone::setStartRule(int32_t month, int32_t dayOfMonth, + int32_t time, + UErrorCode& status) { + setStartRule(month, dayOfMonth, time, WALL_TIME, status); +} + +inline void SimpleTimeZone::setStartRule(int32_t month, int32_t dayOfMonth, + int32_t dayOfWeek, + int32_t time, UBool after, UErrorCode& status) { + setStartRule(month, dayOfMonth, dayOfWeek, time, WALL_TIME, after, status); +} + +inline void SimpleTimeZone::setEndRule(int32_t month, int32_t dayOfWeekInMonth, + int32_t dayOfWeek, + int32_t time, UErrorCode& status) { + setEndRule(month, dayOfWeekInMonth, dayOfWeek, time, WALL_TIME, status); +} + +inline void SimpleTimeZone::setEndRule(int32_t month, int32_t dayOfMonth, + int32_t time, UErrorCode& status) { + setEndRule(month, dayOfMonth, time, WALL_TIME, status); +} + +inline void SimpleTimeZone::setEndRule(int32_t month, int32_t dayOfMonth, int32_t dayOfWeek, + int32_t time, UBool after, UErrorCode& status) { + setEndRule(month, dayOfMonth, dayOfWeek, time, WALL_TIME, after, status); +} + +inline void +SimpleTimeZone::getOffset(UDate date, UBool local, int32_t& rawOffsetRef, + int32_t& dstOffsetRef, UErrorCode& ec) const { + TimeZone::getOffset(date, local, rawOffsetRef, dstOffsetRef, ec); +} + +U_NAMESPACE_END + +#endif /* #if !UCONFIG_NO_FORMATTING */ + +#endif // _SIMPLETZ