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+// © 2016 and later: Unicode, Inc. and others.
+// License & terms of use: http://www.unicode.org/copyright.html
+/*
+*******************************************************************************
+* Copyright (C) 2007-2013, International Business Machines Corporation and
+* others. All Rights Reserved.
+*******************************************************************************
+*/
+#ifndef VTZONE_H
+#define VTZONE_H
+
+#include "unicode/utypes.h"
+
+#if U_SHOW_CPLUSPLUS_API
+
+/**
+ * \file
+ * \brief C++ API: RFC2445 VTIMEZONE support
+ */
+
+#if !UCONFIG_NO_FORMATTING
+
+#include "unicode/basictz.h"
+
+U_NAMESPACE_BEGIN
+
+class VTZWriter;
+class VTZReader;
+class UVector;
+
+/**
+ * <code>VTimeZone</code> is a class implementing RFC2445 VTIMEZONE. You can create a
+ * <code>VTimeZone</code> instance from a time zone ID supported by <code>TimeZone</code>.
+ * With the <code>VTimeZone</code> instance created from the ID, you can write out the rule
+ * in RFC2445 VTIMEZONE format. Also, you can create a <code>VTimeZone</code> instance
+ * from RFC2445 VTIMEZONE data stream, which allows you to calculate time
+ * zone offset by the rules defined by the data. Or, you can create a
+ * <code>VTimeZone</code> from any other ICU <code>BasicTimeZone</code>.
+ * <br><br>
+ * Note: The consumer of this class reading or writing VTIMEZONE data is responsible to
+ * decode or encode Non-ASCII text. Methods reading/writing VTIMEZONE data in this class
+ * do nothing with MIME encoding.
+ * @stable ICU 3.8
+ */
+class U_I18N_API VTimeZone : public BasicTimeZone {
+public:
+ /**
+ * Copy constructor.
+ * @param source The <code>VTimeZone</code> object to be copied.
+ * @stable ICU 3.8
+ */
+ VTimeZone(const VTimeZone& source);
+
+ /**
+ * Destructor.
+ * @stable ICU 3.8
+ */
+ virtual ~VTimeZone();
+
+ /**
+ * Assignment operator.
+ * @param right The object to be copied.
+ * @stable ICU 3.8
+ */
+ VTimeZone& operator=(const VTimeZone& right);
+
+ /**
+ * Return true if the given <code>TimeZone</code> objects are
+ * semantically equal. Objects of different subclasses are considered unequal.
+ * @param that The object to be compared with.
+ * @return true if the given <code>TimeZone</code> objects are
+ *semantically equal.
+ * @stable ICU 3.8
+ */
+ virtual bool operator==(const TimeZone& that) const override;
+
+ /**
+ * Return true if the given <code>TimeZone</code> objects are
+ * semantically unequal. Objects of different subclasses are considered unequal.
+ * @param that The object to be compared with.
+ * @return true if the given <code>TimeZone</code> objects are
+ * semantically unequal.
+ * @stable ICU 3.8
+ */
+ virtual bool operator!=(const TimeZone& that) const;
+
+ /**
+ * Create a <code>VTimeZone</code> instance by the time zone ID.
+ * @param ID The time zone ID, such as America/New_York
+ * @return A <code>VTimeZone</code> object initialized by the time zone ID,
+ * or nullptr when the ID is unknown.
+ * @stable ICU 3.8
+ */
+ static VTimeZone* createVTimeZoneByID(const UnicodeString& ID);
+
+ /**
+ * Create a <code>VTimeZone</code> instance using a basic time zone.
+ * @param basicTZ The basic time zone instance
+ * @param status Output param to filled in with a success or an error.
+ * @return A <code>VTimeZone</code> object initialized by the basic time zone.
+ * @stable ICU 4.6
+ */
+ static VTimeZone* createVTimeZoneFromBasicTimeZone(const BasicTimeZone& basicTZ,
+ UErrorCode &status);
+
+ /**
+ * Create a <code>VTimeZone</code> instance by RFC2445 VTIMEZONE data
+ *
+ * @param vtzdata The string including VTIMEZONE data block
+ * @param status Output param to filled in with a success or an error.
+ * @return A <code>VTimeZone</code> initialized by the VTIMEZONE data or
+ * nullptr if failed to load the rule from the VTIMEZONE data.
+ * @stable ICU 3.8
+ */
+ static VTimeZone* createVTimeZone(const UnicodeString& vtzdata, UErrorCode& status);
+
+ /**
+ * Gets the RFC2445 TZURL property value. When a <code>VTimeZone</code> instance was
+ * created from VTIMEZONE data, the initial value is set by the TZURL property value
+ * in the data. Otherwise, the initial value is not set.
+ * @param url Receives the RFC2445 TZURL property value.
+ * @return true if TZURL attribute is available and value is set.
+ * @stable ICU 3.8
+ */
+ UBool getTZURL(UnicodeString& url) const;
+
+ /**
+ * Sets the RFC2445 TZURL property value.
+ * @param url The TZURL property value.
+ * @stable ICU 3.8
+ */
+ void setTZURL(const UnicodeString& url);
+
+ /**
+ * Gets the RFC2445 LAST-MODIFIED property value. When a <code>VTimeZone</code> instance
+ * was created from VTIMEZONE data, the initial value is set by the LAST-MODIFIED property
+ * value in the data. Otherwise, the initial value is not set.
+ * @param lastModified Receives the last modified date.
+ * @return true if lastModified attribute is available and value is set.
+ * @stable ICU 3.8
+ */
+ UBool getLastModified(UDate& lastModified) const;
+
+ /**
+ * Sets the RFC2445 LAST-MODIFIED property value.
+ * @param lastModified The LAST-MODIFIED date.
+ * @stable ICU 3.8
+ */
+ void setLastModified(UDate lastModified);
+
+ /**
+ * Writes RFC2445 VTIMEZONE data for this time zone
+ * @param result Output param to filled in with the VTIMEZONE data.
+ * @param status Output param to filled in with a success or an error.
+ * @stable ICU 3.8
+ */
+ void write(UnicodeString& result, UErrorCode& status) const;
+
+ /**
+ * Writes RFC2445 VTIMEZONE data for this time zone applicable
+ * for dates after the specified start time.
+ * @param start The start date.
+ * @param result Output param to filled in with the VTIMEZONE data.
+ * @param status Output param to filled in with a success or an error.
+ * @stable ICU 3.8
+ */
+ void write(UDate start, UnicodeString& result, UErrorCode& status) const;
+
+ /**
+ * Writes RFC2445 VTIMEZONE data applicable for the specified date.
+ * Some common iCalendar implementations can only handle a single time
+ * zone property or a pair of standard and daylight time properties using
+ * BYDAY rule with day of week (such as BYDAY=1SUN). This method produce
+ * the VTIMEZONE data which can be handled these implementations. The rules
+ * produced by this method can be used only for calculating time zone offset
+ * around the specified date.
+ * @param time The date used for rule extraction.
+ * @param result Output param to filled in with the VTIMEZONE data.
+ * @param status Output param to filled in with a success or an error.
+ * @stable ICU 3.8
+ */
+ void writeSimple(UDate time, UnicodeString& result, UErrorCode& status) const;
+
+ /**
+ * Clones TimeZone objects polymorphically. Clients are responsible for deleting
+ * the TimeZone object cloned.
+ * @return A new copy of this TimeZone object.
+ * @stable ICU 3.8
+ */
+ virtual VTimeZone* clone() const override;
+
+ /**
+ * 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 local standard time.
+ *
+ * <p>Note: Don't call this method. Instead, call the getOffset(UDate...) overload,
+ * which returns both the raw and the DST offset for a given time. This method
+ * is retained only for backward compatibility.
+ *
+ * @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, local standard time
+ * @param status Output param to filled in with a success or an error.
+ * @return The offset in milliseconds to add to GMT to get local time.
+ * @stable ICU 3.8
+ */
+ 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 override;
+
+ /**
+ * 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.
+ *
+ * <p>Note: Don't call this method. Instead, call the getOffset(UDate...) overload,
+ * which returns both the raw and the DST offset for a given time. This method
+ * is retained only for backward compatibility.
+ *
+ * @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, local standard time
+ * @param monthLength The length of the given month in days.
+ * @param status Output param to filled in with a success or an error.
+ * @return The offset in milliseconds to add to GMT to get local time.
+ * @stable ICU 3.8
+ */
+ virtual int32_t getOffset(uint8_t era, int32_t year, int32_t month, int32_t day,
+ uint8_t dayOfWeek, int32_t millis,
+ int32_t monthLength, UErrorCode& status) const override;
+
+ /**
+ * Returns the time zone raw and GMT offset for the given moment
+ * in time. Upon return, local-millis = GMT-millis + rawOffset +
+ * dstOffset. All computations are performed in the proleptic
+ * Gregorian calendar. The default implementation in the TimeZone
+ * class delegates to the 8-argument getOffset().
+ *
+ * @param date moment in time for which to return offsets, in
+ * units of milliseconds from January 1, 1970 0:00 GMT, either GMT
+ * time or local wall time, depending on `local'.
+ * @param local if true, `date' is local wall time; otherwise it
+ * is in GMT time.
+ * @param rawOffset output parameter to receive the raw offset, that
+ * is, the offset not including DST adjustments
+ * @param dstOffset output parameter to receive the DST offset,
+ * that is, the offset to be added to `rawOffset' to obtain the
+ * total offset between local and GMT time. If DST is not in
+ * effect, this value is zero; otherwise it is a positive value,
+ * typically one hour.
+ * @param ec input-output error code
+ * @stable ICU 3.8
+ */
+ virtual void getOffset(UDate date, UBool local, int32_t& rawOffset,
+ int32_t& dstOffset, UErrorCode& ec) const override;
+
+ /**
+ * Get time zone offsets from local wall time.
+ * @stable ICU 69
+ */
+ virtual void getOffsetFromLocal(
+ UDate date, UTimeZoneLocalOption nonExistingTimeOpt,
+ UTimeZoneLocalOption duplicatedTimeOpt,
+ int32_t& rawOffset, int32_t& dstOffset, UErrorCode& status) const override;
+
+ /**
+ * 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 3.8
+ */
+ virtual void setRawOffset(int32_t offsetMillis) override;
+
+ /**
+ * 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 3.8
+ */
+ virtual int32_t getRawOffset(void) const override;
+
+ /**
+ * Queries if this time zone uses daylight savings time.
+ * @return true if this time zone uses daylight savings time,
+ * false, otherwise.
+ * @stable ICU 3.8
+ */
+ virtual UBool useDaylightTime(void) const override;
+
+#ifndef U_FORCE_HIDE_DEPRECATED_API
+ /**
+ * Queries if the given date is in daylight savings time in
+ * this time zone.
+ * 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 given UDate.
+ * @param status Output param filled in with success/error code.
+ * @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 override;
+#endif // U_FORCE_HIDE_DEPRECATED_API
+
+ /**
+ * Returns true if this zone has the same rule and offset as another zone.
+ * That is, if this zone differs only in ID, if at all.
+ * @param other the <code>TimeZone</code> object to be compared with
+ * @return true if the given zone is the same as this one,
+ * with the possible exception of the ID
+ * @stable ICU 3.8
+ */
+ virtual UBool hasSameRules(const TimeZone& other) const override;
+
+ /**
+ * 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 override;
+
+ /**
+ * 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 override;
+
+ /**
+ * Returns the number of <code>TimeZoneRule</code>s which represents time transitions,
+ * for this time zone, that is, all <code>TimeZoneRule</code>s for this time zone except
+ * <code>InitialTimeZoneRule</code>. The return value range is 0 or any positive value.
+ * @param status Receives error status code.
+ * @return The number of <code>TimeZoneRule</code>s representing time transitions.
+ * @stable ICU 3.8
+ */
+ virtual int32_t countTransitionRules(UErrorCode& status) const override;
+
+ /**
+ * Gets the <code>InitialTimeZoneRule</code> and the set of <code>TimeZoneRule</code>
+ * which represent time transitions for this time zone. On successful return,
+ * the argument initial points to non-nullptr <code>InitialTimeZoneRule</code> and
+ * the array trsrules is filled with 0 or multiple <code>TimeZoneRule</code>
+ * 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 override;
+
+private:
+ enum { DEFAULT_VTIMEZONE_LINES = 100 };
+
+ /**
+ * Default constructor.
+ */
+ VTimeZone();
+ void write(VTZWriter& writer, UErrorCode& status) const;
+ void write(UDate start, VTZWriter& writer, UErrorCode& status) const;
+ void writeSimple(UDate time, VTZWriter& writer, UErrorCode& status) const;
+ void load(VTZReader& reader, UErrorCode& status);
+ void parse(UErrorCode& status);
+
+ void writeZone(VTZWriter& w, BasicTimeZone& basictz, UVector* customProps,
+ UErrorCode& status) const;
+
+ void writeHeaders(VTZWriter& w, UErrorCode& status) const;
+ void writeFooter(VTZWriter& writer, UErrorCode& status) const;
+
+ void writeZonePropsByTime(VTZWriter& writer, UBool isDst, const UnicodeString& zonename,
+ int32_t fromOffset, int32_t toOffset, UDate time, UBool withRDATE,
+ UErrorCode& status) const;
+ void writeZonePropsByDOM(VTZWriter& writer, UBool isDst, const UnicodeString& zonename,
+ int32_t fromOffset, int32_t toOffset,
+ int32_t month, int32_t dayOfMonth, UDate startTime, UDate untilTime,
+ UErrorCode& status) const;
+ void writeZonePropsByDOW(VTZWriter& writer, UBool isDst, const UnicodeString& zonename,
+ int32_t fromOffset, int32_t toOffset,
+ int32_t month, int32_t weekInMonth, int32_t dayOfWeek,
+ UDate startTime, UDate untilTime, UErrorCode& status) const;
+ void writeZonePropsByDOW_GEQ_DOM(VTZWriter& writer, UBool isDst, const UnicodeString& zonename,
+ int32_t fromOffset, int32_t toOffset,
+ int32_t month, int32_t dayOfMonth, int32_t dayOfWeek,
+ UDate startTime, UDate untilTime, UErrorCode& status) const;
+ void writeZonePropsByDOW_GEQ_DOM_sub(VTZWriter& writer, int32_t month, int32_t dayOfMonth,
+ int32_t dayOfWeek, int32_t numDays,
+ UDate untilTime, int32_t fromOffset, UErrorCode& status) const;
+ void writeZonePropsByDOW_LEQ_DOM(VTZWriter& writer, UBool isDst, const UnicodeString& zonename,
+ int32_t fromOffset, int32_t toOffset,
+ int32_t month, int32_t dayOfMonth, int32_t dayOfWeek,
+ UDate startTime, UDate untilTime, UErrorCode& status) const;
+ void writeFinalRule(VTZWriter& writer, UBool isDst, const AnnualTimeZoneRule* rule,
+ int32_t fromRawOffset, int32_t fromDSTSavings,
+ UDate startTime, UErrorCode& status) const;
+
+ void beginZoneProps(VTZWriter& writer, UBool isDst, const UnicodeString& zonename,
+ int32_t fromOffset, int32_t toOffset, UDate startTime, UErrorCode& status) const;
+ void endZoneProps(VTZWriter& writer, UBool isDst, UErrorCode& status) const;
+ void beginRRULE(VTZWriter& writer, int32_t month, UErrorCode& status) const;
+ void appendUNTIL(VTZWriter& writer, const UnicodeString& until, UErrorCode& status) const;
+
+ BasicTimeZone *tz;
+ UVector *vtzlines;
+ UnicodeString tzurl;
+ UDate lastmod;
+ UnicodeString olsonzid;
+ UnicodeString icutzver;
+
+public:
+ /**
+ * Return the class ID for this class. This is useful only for comparing to
+ * a return value from getDynamicClassID(). For example:
+ * <pre>
+ * . Base* polymorphic_pointer = createPolymorphicObject();
+ * . if (polymorphic_pointer->getDynamicClassID() ==
+ * . erived::getStaticClassID()) ...
+ * </pre>
+ * @return The class ID for all objects of this class.
+ * @stable ICU 3.8
+ */
+ static UClassID U_EXPORT2 getStaticClassID(void);
+
+ /**
+ * 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 3.8
+ */
+ virtual UClassID getDynamicClassID(void) const override;
+};
+
+U_NAMESPACE_END
+
+#endif /* #if !UCONFIG_NO_FORMATTING */
+
+#endif /* U_SHOW_CPLUSPLUS_API */
+
+#endif // VTZONE_H
+//eof
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