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diff --git a/intl/icu/source/i18n/unicode/tzrule.h b/intl/icu/source/i18n/unicode/tzrule.h new file mode 100644 index 0000000000..9ec1e96179 --- /dev/null +++ b/intl/icu/source/i18n/unicode/tzrule.h @@ -0,0 +1,820 @@ +// © 2016 and later: Unicode, Inc. and others. +// License & terms of use: http://www.unicode.org/copyright.html +/* +******************************************************************************* +* Copyright (C) 2007-2008, International Business Machines Corporation and * +* others. All Rights Reserved. * +******************************************************************************* +*/ +#ifndef TZRULE_H +#define TZRULE_H + +/** + * \file + * \brief C++ API: Time zone rule classes + */ + +#include "unicode/utypes.h" + +#if U_SHOW_CPLUSPLUS_API + +#if !UCONFIG_NO_FORMATTING + +#include "unicode/uobject.h" +#include "unicode/unistr.h" +#include "unicode/dtrule.h" + +U_NAMESPACE_BEGIN + +/** + * <code>TimeZoneRule</code> is a class representing a rule for time zone. + * <code>TimeZoneRule</code> has a set of time zone attributes, such as zone name, + * raw offset (UTC offset for standard time) and daylight saving time offset. + * + * @stable ICU 3.8 + */ +class U_I18N_API TimeZoneRule : public UObject { +public: + /** + * Destructor. + * @stable ICU 3.8 + */ + virtual ~TimeZoneRule(); + + /** + * Clone this TimeZoneRule object polymorphically. The caller owns the result and + * should delete it when done. + * @return A copy of the object. + * @stable ICU 3.8 + */ + virtual TimeZoneRule* clone() const = 0; + + /** + * Return true if the given <code>TimeZoneRule</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>TimeZoneRule</code> objects are semantically equal. + * @stable ICU 3.8 + */ + virtual bool operator==(const TimeZoneRule& that) const; + + /** + * Return true if the given <code>TimeZoneRule</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>TimeZoneRule</code> objects are semantically unequal. + * @stable ICU 3.8 + */ + virtual bool operator!=(const TimeZoneRule& that) const; + + /** + * Fills in "name" with the name of this time zone. + * @param name Receives the name of this time zone. + * @return A reference to "name" + * @stable ICU 3.8 + */ + UnicodeString& getName(UnicodeString& name) const; + + /** + * Gets the standard time offset. + * @return The standard time offset from UTC in milliseconds. + * @stable ICU 3.8 + */ + int32_t getRawOffset(void) const; + + /** + * Gets the amount of daylight saving delta time from the standard time. + * @return The amount of daylight saving offset used by this rule + * in milliseconds. + * @stable ICU 3.8 + */ + int32_t getDSTSavings(void) const; + + /** + * Returns if this rule represents the same rule and offsets as another. + * When two <code>TimeZoneRule</code> objects differ only its names, this method + * returns true. + * @param other The <code>TimeZoneRule</code> object to be compared with. + * @return true if the other <code>TimeZoneRule</code> is the same as this one. + * @stable ICU 3.8 + */ + virtual UBool isEquivalentTo(const TimeZoneRule& other) const; + + /** + * Gets the very first time when this rule takes effect. + * @param prevRawOffset The standard time offset from UTC before this rule + * takes effect in milliseconds. + * @param prevDSTSavings The amount of daylight saving offset from the + * standard time. + * @param result Receives the very first time when this rule takes effect. + * @return true if the start time is available. When false is returned, output parameter + * "result" is unchanged. + * @stable ICU 3.8 + */ + virtual UBool getFirstStart(int32_t prevRawOffset, int32_t prevDSTSavings, UDate& result) const = 0; + + /** + * Gets the final time when this rule takes effect. + * @param prevRawOffset The standard time offset from UTC before this rule + * takes effect in milliseconds. + * @param prevDSTSavings The amount of daylight saving offset from the + * standard time. + * @param result Receives the final time when this rule takes effect. + * @return true if the start time is available. When false is returned, output parameter + * "result" is unchanged. + * @stable ICU 3.8 + */ + virtual UBool getFinalStart(int32_t prevRawOffset, int32_t prevDSTSavings, UDate& result) const = 0; + + /** + * Gets the first time when this rule takes effect after the specified time. + * @param base The first start time after this base time will be returned. + * @param prevRawOffset The standard time offset from UTC before this rule + * takes effect in milliseconds. + * @param prevDSTSavings The amount of daylight saving offset from the + * standard time. + * @param inclusive Whether the base time is inclusive or not. + * @param result Receives The first time when this rule takes effect after + * the specified base time. + * @return true if the start time is available. When false is returned, output parameter + * "result" is unchanged. + * @stable ICU 3.8 + */ + virtual UBool getNextStart(UDate base, int32_t prevRawOffset, int32_t prevDSTSavings, + UBool inclusive, UDate& result) const = 0; + + /** + * Gets the most recent time when this rule takes effect before the specified time. + * @param base The most recent time before this base time will be returned. + * @param prevRawOffset The standard time offset from UTC before this rule + * takes effect in milliseconds. + * @param prevDSTSavings The amount of daylight saving offset from the + * standard time. + * @param inclusive Whether the base time is inclusive or not. + * @param result Receives The most recent time when this rule takes effect before + * the specified base time. + * @return true if the start time is available. When false is returned, output parameter + * "result" is unchanged. + * @stable ICU 3.8 + */ + virtual UBool getPreviousStart(UDate base, int32_t prevRawOffset, int32_t prevDSTSavings, + UBool inclusive, UDate& result) const = 0; + +protected: + + /** + * Constructs a <code>TimeZoneRule</code> with the name, the GMT offset of its + * standard time and the amount of daylight saving offset adjustment. + * @param name The time zone name. + * @param rawOffset The UTC offset of its standard time in milliseconds. + * @param dstSavings The amount of daylight saving offset adjustment in milliseconds. + * If this ia a rule for standard time, the value of this argument is 0. + * @stable ICU 3.8 + */ + TimeZoneRule(const UnicodeString& name, int32_t rawOffset, int32_t dstSavings); + + /** + * Copy constructor. + * @param source The TimeZoneRule object to be copied. + * @stable ICU 3.8 + */ + TimeZoneRule(const TimeZoneRule& source); + + /** + * Assignment operator. + * @param right The object to be copied. + * @stable ICU 3.8 + */ + TimeZoneRule& operator=(const TimeZoneRule& right); + +private: + UnicodeString fName; // time name + int32_t fRawOffset; // UTC offset of the standard time in milliseconds + int32_t fDSTSavings; // DST saving amount in milliseconds +}; + +/** + * <code>InitialTimeZoneRule</code> represents a time zone rule + * representing a time zone effective from the beginning and + * has no actual start times. + * @stable ICU 3.8 + */ +class U_I18N_API InitialTimeZoneRule : public TimeZoneRule { +public: + /** + * Constructs an <code>InitialTimeZoneRule</code> with the name, the GMT offset of its + * standard time and the amount of daylight saving offset adjustment. + * @param name The time zone name. + * @param rawOffset The UTC offset of its standard time in milliseconds. + * @param dstSavings The amount of daylight saving offset adjustment in milliseconds. + * If this ia a rule for standard time, the value of this argument is 0. + * @stable ICU 3.8 + */ + InitialTimeZoneRule(const UnicodeString& name, int32_t rawOffset, int32_t dstSavings); + + /** + * Copy constructor. + * @param source The InitialTimeZoneRule object to be copied. + * @stable ICU 3.8 + */ + InitialTimeZoneRule(const InitialTimeZoneRule& source); + + /** + * Destructor. + * @stable ICU 3.8 + */ + virtual ~InitialTimeZoneRule(); + + /** + * Clone this InitialTimeZoneRule object polymorphically. The caller owns the result and + * should delete it when done. + * @return A copy of the object. + * @stable ICU 3.8 + */ + virtual InitialTimeZoneRule* clone() const override; + + /** + * Assignment operator. + * @param right The object to be copied. + * @stable ICU 3.8 + */ + InitialTimeZoneRule& operator=(const InitialTimeZoneRule& right); + + /** + * Return true if the given <code>TimeZoneRule</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>TimeZoneRule</code> objects are semantically equal. + * @stable ICU 3.8 + */ + virtual bool operator==(const TimeZoneRule& that) const override; + + /** + * Return true if the given <code>TimeZoneRule</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>TimeZoneRule</code> objects are semantically unequal. + * @stable ICU 3.8 + */ + virtual bool operator!=(const TimeZoneRule& that) const override; + + /** + * Returns if this rule represents the same rule and offsets as another. + * When two <code>TimeZoneRule</code> objects differ only its names, this method + * returns true. + * @param that The <code>TimeZoneRule</code> object to be compared with. + * @return true if the other <code>TimeZoneRule</code> is equivalent to this one. + * @stable ICU 3.8 + */ + virtual UBool isEquivalentTo(const TimeZoneRule& that) const override; + + /** + * Gets the very first time when this rule takes effect. + * @param prevRawOffset The standard time offset from UTC before this rule + * takes effect in milliseconds. + * @param prevDSTSavings The amount of daylight saving offset from the + * standard time. + * @param result Receives the very first time when this rule takes effect. + * @return true if the start time is available. When false is returned, output parameter + * "result" is unchanged. + * @stable ICU 3.8 + */ + virtual UBool getFirstStart(int32_t prevRawOffset, int32_t prevDSTSavings, UDate& result) const override; + + /** + * Gets the final time when this rule takes effect. + * @param prevRawOffset The standard time offset from UTC before this rule + * takes effect in milliseconds. + * @param prevDSTSavings The amount of daylight saving offset from the + * standard time. + * @param result Receives the final time when this rule takes effect. + * @return true if the start time is available. When false is returned, output parameter + * "result" is unchanged. + * @stable ICU 3.8 + */ + virtual UBool getFinalStart(int32_t prevRawOffset, int32_t prevDSTSavings, UDate& result) const override; + + /** + * Gets the first time when this rule takes effect after the specified time. + * @param base The first start time after this base time will be returned. + * @param prevRawOffset The standard time offset from UTC before this rule + * takes effect in milliseconds. + * @param prevDSTSavings The amount of daylight saving offset from the + * standard time. + * @param inclusive Whether the base time is inclusive or not. + * @param result Receives The first time when this rule takes effect after + * the specified base time. + * @return true if the start time is available. When false is returned, output parameter + * "result" is unchanged. + * @stable ICU 3.8 + */ + virtual UBool getNextStart(UDate base, int32_t prevRawOffset, int32_t prevDSTSavings, + UBool inclusive, UDate& result) const override; + + /** + * Gets the most recent time when this rule takes effect before the specified time. + * @param base The most recent time before this base time will be returned. + * @param prevRawOffset The standard time offset from UTC before this rule + * takes effect in milliseconds. + * @param prevDSTSavings The amount of daylight saving offset from the + * standard time. + * @param inclusive Whether the base time is inclusive or not. + * @param result Receives The most recent time when this rule takes effect before + * the specified base time. + * @return true if the start time is available. When false is returned, output parameter + * "result" is unchanged. + * @stable ICU 3.8 + */ + virtual UBool getPreviousStart(UDate base, int32_t prevRawOffset, int32_t prevDSTSavings, + UBool inclusive, UDate& result) const override; + +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; +}; + +/** + * <code>AnnualTimeZoneRule</code> is a class used for representing a time zone + * rule which takes effect annually. The calendar system used for the rule is + * is based on Gregorian calendar + * + * @stable ICU 3.8 + */ +class U_I18N_API AnnualTimeZoneRule : public TimeZoneRule { +public: + /** + * The constant representing the maximum year used for designating + * a rule is permanent. + */ + static const int32_t MAX_YEAR; + + /** + * Constructs a <code>AnnualTimeZoneRule</code> with the name, the GMT offset of its + * standard time, the amount of daylight saving offset adjustment, the annual start + * time rule and the start/until years. The input DateTimeRule is copied by this + * constructor, so the caller remains responsible for deleting the object. + * @param name The time zone name. + * @param rawOffset The GMT offset of its standard time in milliseconds. + * @param dstSavings The amount of daylight saving offset adjustment in + * milliseconds. If this ia a rule for standard time, + * the value of this argument is 0. + * @param dateTimeRule The start date/time rule repeated annually. + * @param startYear The first year when this rule takes effect. + * @param endYear The last year when this rule takes effect. If this + * rule is effective forever in future, specify MAX_YEAR. + * @stable ICU 3.8 + */ + AnnualTimeZoneRule(const UnicodeString& name, int32_t rawOffset, int32_t dstSavings, + const DateTimeRule& dateTimeRule, int32_t startYear, int32_t endYear); + + /** + * Constructs a <code>AnnualTimeZoneRule</code> with the name, the GMT offset of its + * standard time, the amount of daylight saving offset adjustment, the annual start + * time rule and the start/until years. The input DateTimeRule object is adopted + * by this object, therefore, the caller must not delete the object. + * @param name The time zone name. + * @param rawOffset The GMT offset of its standard time in milliseconds. + * @param dstSavings The amount of daylight saving offset adjustment in + * milliseconds. If this ia a rule for standard time, + * the value of this argument is 0. + * @param dateTimeRule The start date/time rule repeated annually. + * @param startYear The first year when this rule takes effect. + * @param endYear The last year when this rule takes effect. If this + * rule is effective forever in future, specify MAX_YEAR. + * @stable ICU 3.8 + */ + AnnualTimeZoneRule(const UnicodeString& name, int32_t rawOffset, int32_t dstSavings, + DateTimeRule* dateTimeRule, int32_t startYear, int32_t endYear); + + /** + * Copy constructor. + * @param source The AnnualTimeZoneRule object to be copied. + * @stable ICU 3.8 + */ + AnnualTimeZoneRule(const AnnualTimeZoneRule& source); + + /** + * Destructor. + * @stable ICU 3.8 + */ + virtual ~AnnualTimeZoneRule(); + + /** + * Clone this AnnualTimeZoneRule object polymorphically. The caller owns the result and + * should delete it when done. + * @return A copy of the object. + * @stable ICU 3.8 + */ + virtual AnnualTimeZoneRule* clone() const override; + + /** + * Assignment operator. + * @param right The object to be copied. + * @stable ICU 3.8 + */ + AnnualTimeZoneRule& operator=(const AnnualTimeZoneRule& right); + + /** + * Return true if the given <code>TimeZoneRule</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>TimeZoneRule</code> objects are semantically equal. + * @stable ICU 3.8 + */ + virtual bool operator==(const TimeZoneRule& that) const override; + + /** + * Return true if the given <code>TimeZoneRule</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>TimeZoneRule</code> objects are semantically unequal. + * @stable ICU 3.8 + */ + virtual bool operator!=(const TimeZoneRule& that) const override; + + /** + * Gets the start date/time rule used by this rule. + * @return The <code>AnnualDateTimeRule</code> which represents the start date/time + * rule used by this time zone rule. + * @stable ICU 3.8 + */ + const DateTimeRule* getRule(void) const; + + /** + * Gets the first year when this rule takes effect. + * @return The start year of this rule. The year is in Gregorian calendar + * with 0 == 1 BCE, -1 == 2 BCE, etc. + * @stable ICU 3.8 + */ + int32_t getStartYear(void) const; + + /** + * Gets the end year when this rule takes effect. + * @return The end year of this rule (inclusive). The year is in Gregorian calendar + * with 0 == 1 BCE, -1 == 2 BCE, etc. + * @stable ICU 3.8 + */ + int32_t getEndYear(void) const; + + /** + * Gets the time when this rule takes effect in the given year. + * @param year The Gregorian year, with 0 == 1 BCE, -1 == 2 BCE, etc. + * @param prevRawOffset The standard time offset from UTC before this rule + * takes effect in milliseconds. + * @param prevDSTSavings The amount of daylight saving offset from the + * standard time. + * @param result Receives the start time in the year. + * @return true if this rule takes effect in the year and the result is set to + * "result". + * @stable ICU 3.8 + */ + UBool getStartInYear(int32_t year, int32_t prevRawOffset, int32_t prevDSTSavings, UDate& result) const; + + /** + * Returns if this rule represents the same rule and offsets as another. + * When two <code>TimeZoneRule</code> objects differ only its names, this method + * returns true. + * @param that The <code>TimeZoneRule</code> object to be compared with. + * @return true if the other <code>TimeZoneRule</code> is equivalent to this one. + * @stable ICU 3.8 + */ + virtual UBool isEquivalentTo(const TimeZoneRule& that) const override; + + /** + * Gets the very first time when this rule takes effect. + * @param prevRawOffset The standard time offset from UTC before this rule + * takes effect in milliseconds. + * @param prevDSTSavings The amount of daylight saving offset from the + * standard time. + * @param result Receives the very first time when this rule takes effect. + * @return true if the start time is available. When false is returned, output parameter + * "result" is unchanged. + * @stable ICU 3.8 + */ + virtual UBool getFirstStart(int32_t prevRawOffset, int32_t prevDSTSavings, UDate& result) const override; + + /** + * Gets the final time when this rule takes effect. + * @param prevRawOffset The standard time offset from UTC before this rule + * takes effect in milliseconds. + * @param prevDSTSavings The amount of daylight saving offset from the + * standard time. + * @param result Receives the final time when this rule takes effect. + * @return true if the start time is available. When false is returned, output parameter + * "result" is unchanged. + * @stable ICU 3.8 + */ + virtual UBool getFinalStart(int32_t prevRawOffset, int32_t prevDSTSavings, UDate& result) const override; + + /** + * Gets the first time when this rule takes effect after the specified time. + * @param base The first start time after this base time will be returned. + * @param prevRawOffset The standard time offset from UTC before this rule + * takes effect in milliseconds. + * @param prevDSTSavings The amount of daylight saving offset from the + * standard time. + * @param inclusive Whether the base time is inclusive or not. + * @param result Receives The first time when this rule takes effect after + * the specified base time. + * @return true if the start time is available. When false is returned, output parameter + * "result" is unchanged. + * @stable ICU 3.8 + */ + virtual UBool getNextStart(UDate base, int32_t prevRawOffset, int32_t prevDSTSavings, + UBool inclusive, UDate& result) const override; + + /** + * Gets the most recent time when this rule takes effect before the specified time. + * @param base The most recent time before this base time will be returned. + * @param prevRawOffset The standard time offset from UTC before this rule + * takes effect in milliseconds. + * @param prevDSTSavings The amount of daylight saving offset from the + * standard time. + * @param inclusive Whether the base time is inclusive or not. + * @param result Receives The most recent time when this rule takes effect before + * the specified base time. + * @return true if the start time is available. When false is returned, output parameter + * "result" is unchanged. + * @stable ICU 3.8 + */ + virtual UBool getPreviousStart(UDate base, int32_t prevRawOffset, int32_t prevDSTSavings, + UBool inclusive, UDate& result) const override; + + +private: + DateTimeRule* fDateTimeRule; + int32_t fStartYear; + int32_t fEndYear; + +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; +}; + +/** + * <code>TimeArrayTimeZoneRule</code> represents a time zone rule whose start times are + * defined by an array of milliseconds since the standard base time. + * + * @stable ICU 3.8 + */ +class U_I18N_API TimeArrayTimeZoneRule : public TimeZoneRule { +public: + /** + * Constructs a <code>TimeArrayTimeZoneRule</code> with the name, the GMT offset of its + * standard time, the amount of daylight saving offset adjustment and + * the array of times when this rule takes effect. + * @param name The time zone name. + * @param rawOffset The UTC offset of its standard time in milliseconds. + * @param dstSavings The amount of daylight saving offset adjustment in + * milliseconds. If this ia a rule for standard time, + * the value of this argument is 0. + * @param startTimes The array start times in milliseconds since the base time + * (January 1, 1970, 00:00:00). + * @param numStartTimes The number of elements in the parameter "startTimes" + * @param timeRuleType The time type of the start times, which is one of + * <code>DataTimeRule::WALL_TIME</code>, <code>STANDARD_TIME</code> + * and <code>UTC_TIME</code>. + * @stable ICU 3.8 + */ + TimeArrayTimeZoneRule(const UnicodeString& name, int32_t rawOffset, int32_t dstSavings, + const UDate* startTimes, int32_t numStartTimes, DateTimeRule::TimeRuleType timeRuleType); + + /** + * Copy constructor. + * @param source The TimeArrayTimeZoneRule object to be copied. + * @stable ICU 3.8 + */ + TimeArrayTimeZoneRule(const TimeArrayTimeZoneRule& source); + + /** + * Destructor. + * @stable ICU 3.8 + */ + virtual ~TimeArrayTimeZoneRule(); + + /** + * Clone this TimeArrayTimeZoneRule object polymorphically. The caller owns the result and + * should delete it when done. + * @return A copy of the object. + * @stable ICU 3.8 + */ + virtual TimeArrayTimeZoneRule* clone() const override; + + /** + * Assignment operator. + * @param right The object to be copied. + * @stable ICU 3.8 + */ + TimeArrayTimeZoneRule& operator=(const TimeArrayTimeZoneRule& right); + + /** + * Return true if the given <code>TimeZoneRule</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>TimeZoneRule</code> objects are semantically equal. + * @stable ICU 3.8 + */ + virtual bool operator==(const TimeZoneRule& that) const override; + + /** + * Return true if the given <code>TimeZoneRule</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>TimeZoneRule</code> objects are semantically unequal. + * @stable ICU 3.8 + */ + virtual bool operator!=(const TimeZoneRule& that) const override; + + /** + * Gets the time type of the start times used by this rule. The return value + * is either <code>DateTimeRule::WALL_TIME</code> or <code>STANDARD_TIME</code> + * or <code>UTC_TIME</code>. + * + * @return The time type used of the start times used by this rule. + * @stable ICU 3.8 + */ + DateTimeRule::TimeRuleType getTimeType(void) const; + + /** + * Gets a start time at the index stored in this rule. + * @param index The index of start times + * @param result Receives the start time at the index + * @return true if the index is within the valid range and + * and the result is set. When false, the output + * parameger "result" is unchanged. + * @stable ICU 3.8 + */ + UBool getStartTimeAt(int32_t index, UDate& result) const; + + /** + * Returns the number of start times stored in this rule + * @return The number of start times. + * @stable ICU 3.8 + */ + int32_t countStartTimes(void) const; + + /** + * Returns if this rule represents the same rule and offsets as another. + * When two <code>TimeZoneRule</code> objects differ only its names, this method + * returns true. + * @param that The <code>TimeZoneRule</code> object to be compared with. + * @return true if the other <code>TimeZoneRule</code> is equivalent to this one. + * @stable ICU 3.8 + */ + virtual UBool isEquivalentTo(const TimeZoneRule& that) const override; + + /** + * Gets the very first time when this rule takes effect. + * @param prevRawOffset The standard time offset from UTC before this rule + * takes effect in milliseconds. + * @param prevDSTSavings The amount of daylight saving offset from the + * standard time. + * @param result Receives the very first time when this rule takes effect. + * @return true if the start time is available. When false is returned, output parameter + * "result" is unchanged. + * @stable ICU 3.8 + */ + virtual UBool getFirstStart(int32_t prevRawOffset, int32_t prevDSTSavings, UDate& result) const override; + + /** + * Gets the final time when this rule takes effect. + * @param prevRawOffset The standard time offset from UTC before this rule + * takes effect in milliseconds. + * @param prevDSTSavings The amount of daylight saving offset from the + * standard time. + * @param result Receives the final time when this rule takes effect. + * @return true if the start time is available. When false is returned, output parameter + * "result" is unchanged. + * @stable ICU 3.8 + */ + virtual UBool getFinalStart(int32_t prevRawOffset, int32_t prevDSTSavings, UDate& result) const override; + + /** + * Gets the first time when this rule takes effect after the specified time. + * @param base The first start time after this base time will be returned. + * @param prevRawOffset The standard time offset from UTC before this rule + * takes effect in milliseconds. + * @param prevDSTSavings The amount of daylight saving offset from the + * standard time. + * @param inclusive Whether the base time is inclusive or not. + * @param result Receives The first time when this rule takes effect after + * the specified base time. + * @return true if the start time is available. When false is returned, output parameter + * "result" is unchanged. + * @stable ICU 3.8 + */ + virtual UBool getNextStart(UDate base, int32_t prevRawOffset, int32_t prevDSTSavings, + UBool inclusive, UDate& result) const override; + + /** + * Gets the most recent time when this rule takes effect before the specified time. + * @param base The most recent time before this base time will be returned. + * @param prevRawOffset The standard time offset from UTC before this rule + * takes effect in milliseconds. + * @param prevDSTSavings The amount of daylight saving offset from the + * standard time. + * @param inclusive Whether the base time is inclusive or not. + * @param result Receives The most recent time when this rule takes effect before + * the specified base time. + * @return true if the start time is available. When false is returned, output parameter + * "result" is unchanged. + * @stable ICU 3.8 + */ + virtual UBool getPreviousStart(UDate base, int32_t prevRawOffset, int32_t prevDSTSavings, + UBool inclusive, UDate& result) const override; + + +private: + enum { TIMEARRAY_STACK_BUFFER_SIZE = 32 }; + UBool initStartTimes(const UDate source[], int32_t size, UErrorCode& ec); + UDate getUTC(UDate time, int32_t raw, int32_t dst) const; + + DateTimeRule::TimeRuleType fTimeRuleType; + int32_t fNumStartTimes; + UDate* fStartTimes; + UDate fLocalStartTimes[TIMEARRAY_STACK_BUFFER_SIZE]; + +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 // TZRULE_H + +//eof |