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Edit File : basictz.h \| Size : 8.84 KB
// © 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 BASICTZ_H #define BASICTZ_H /* * \file * \brief C++ API: ICU TimeZone base class / #include "unicode/utypes.h" #if !UCONFIG_NO_FORMATTING #include "unicode/timezone.h" #include "unicode/tzrule.h" #include "unicode/tztrans.h" U_NAMESPACE_BEGIN // forward declarations class UVector; /* * <code>BasicTimeZone</code> is an abstract class extending <code>TimeZone</code>. * This class provides some additional methods to access time zone transitions and rules. * All ICU <code>TimeZone</code> concrete subclasses extend this class. * @stable ICU 3.8 / class U_I18N_API BasicTimeZone: public TimeZone { public: /* * Destructor. * @stable ICU 3.8 / virtual ~BasicTimeZone(); /* * 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 = 0; /* * 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 = 0; /* * Checks if the time zone has equivalent transitions in the time range. * This method returns true when all of transition times, from/to standard * offsets and DST savings used by this time zone match the other in the * time range. * @param tz The <code>BasicTimeZone</code> object to be compared with. * @param start The start time of the evaluated time range (inclusive) * @param end The end time of the evaluated time range (inclusive) * @param ignoreDstAmount * When true, any transitions with only daylight saving amount * changes will be ignored, except either of them is zero. * For example, a transition from rawoffset 3:00/dstsavings 1:00 * to rawoffset 2:00/dstsavings 2:00 is excluded from the comparison, * but a transtion from rawoffset 2:00/dstsavings 1:00 to * rawoffset 3:00/dstsavings 0:00 is included. * @param ec Output param to filled in with a success or an error. * @return true if the other time zone has the equivalent transitions in the * time range. * @stable ICU 3.8 / virtual UBool hasEquivalentTransitions(const BasicTimeZone& tz, UDate start, UDate end, UBool ignoreDstAmount, UErrorCode& ec) const; /* * 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 = 0; /* * 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-NULL <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 = 0; /** * Gets the set of time zone rules valid at the specified time. Some known external time zone * implementations are not capable to handle historic time zone rule changes. Also some * implementations can only handle certain type of rule definitions. * If this time zone does not use any daylight saving time within about 1 year from the specified * time, only the <code>InitialTimeZone</code> is returned. Otherwise, the rule for standard * time and daylight saving time transitions are returned in addition to the * <code>InitialTimeZoneRule</code>. The standard and daylight saving time transition rules are * represented by <code>AnnualTimeZoneRule</code> with <code>DateTimeRule::DOW</code> for its date * rule and <code>DateTimeRule::WALL_TIME</code> for its time rule. Because daylight saving time * rule is changing time to time in many time zones and also mapping a transition time rule to * different type is lossy transformation, the set of rules returned by this method may be valid * for short period of time. * The time zone rule objects returned by this method is owned by the caller, so the caller is * responsible for deleting them after use. * @param date The date used for extracting time zone rules. * @param initial Receives the <code>InitialTimeZone</code>, always not NULL. * @param std Receives the <code>AnnualTimeZoneRule</code> for standard time transitions. * When this time time zone does not observe daylight saving times around the * specified date, NULL is set. * @param dst Receives the <code>AnnualTimeZoneRule</code> for daylight saving time * transitions. When this time zone does not observer daylight saving times * around the specified date, NULL is set. * @param status Receives error status code. * @stable ICU 3.8 / virtual void getSimpleRulesNear(UDate date, InitialTimeZoneRule& initial, AnnualTimeZoneRule& std, AnnualTimeZoneRule& dst, UErrorCode& status) const; #ifndef U_HIDE_INTERNAL_API /** * The time type option bit flags used by getOffsetFromLocal * @internal / enum { kStandard = 0x01, kDaylight = 0x03, kFormer = 0x04, kLatter = 0x0C }; #endif / U_HIDE_INTERNAL_API / /* * 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; protected: #ifndef U_HIDE_INTERNAL_API /* * The time type option bit masks used by getOffsetFromLocal * @internal / enum { kStdDstMask = kDaylight, kFormerLatterMask = kLatter }; #endif / U_HIDE_INTERNAL_API / /* * Default constructor. * @stable ICU 3.8 / BasicTimeZone(); /* * Construct a timezone with a given ID. * @param id a system time zone ID * @stable ICU 3.8 / BasicTimeZone(const UnicodeString &id); /* * Copy constructor. * @param source the object to be copied. * @stable ICU 3.8 / BasicTimeZone(const BasicTimeZone& source); /* * Gets the set of TimeZoneRule instances applicable to the specified time and after. * @param start The start date used for extracting time zone rules * @param initial Receives the InitialTimeZone, always not NULL * @param transitionRules Receives the transition rules, could be NULL * @param status Receives error status code / void getTimeZoneRulesAfter(UDate start, InitialTimeZoneRule& initial, UVector& transitionRules, UErrorCode& status) const; }; U_NAMESPACE_END #endif / #if !UCONFIG_NO_FORMATTING */ #endif // BASICTZ_H //eof Back

Edit File : basictz.h | Size : 8.84 KB

// © 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 BASICTZ_H
#define BASICTZ_H

/**
 * \file 
 * \brief C++ API: ICU TimeZone base class
 */

#include "unicode/utypes.h"

#if !UCONFIG_NO_FORMATTING

#include "unicode/timezone.h"
#include "unicode/tzrule.h"
#include "unicode/tztrans.h"

U_NAMESPACE_BEGIN

// forward declarations
class UVector;

/**
 * <code>BasicTimeZone</code> is an abstract class extending <code>TimeZone</code>.
 * This class provides some additional methods to access time zone transitions and rules.
 * All ICU <code>TimeZone</code> concrete subclasses extend this class.
 * @stable ICU 3.8
 */
class U_I18N_API BasicTimeZone: public TimeZone {
public:
    /**
     * Destructor.
     * @stable ICU 3.8
     */
    virtual ~BasicTimeZone();

/**
     * 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 = 0;

/**
     * 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 = 0;

/**
     * Checks if the time zone has equivalent transitions in the time range.
     * This method returns true when all of transition times, from/to standard
     * offsets and DST savings used by this time zone match the other in the
     * time range.
     * @param tz    The <code>BasicTimeZone</code> object to be compared with.
     * @param start The start time of the evaluated time range (inclusive)
     * @param end   The end time of the evaluated time range (inclusive)
     * @param ignoreDstAmount
     *              When true, any transitions with only daylight saving amount
     *              changes will be ignored, except either of them is zero.
     *              For example, a transition from rawoffset 3:00/dstsavings 1:00
     *              to rawoffset 2:00/dstsavings 2:00 is excluded from the comparison,
     *              but a transtion from rawoffset 2:00/dstsavings 1:00 to
     *              rawoffset 3:00/dstsavings 0:00 is included.
     * @param ec    Output param to filled in with a success or an error.
     * @return      true if the other time zone has the equivalent transitions in the
     *              time range.
     * @stable ICU 3.8
     */
    virtual UBool hasEquivalentTransitions(const BasicTimeZone& tz, UDate start, UDate end,
        UBool ignoreDstAmount, UErrorCode& ec) const;

/**
     * 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 = 0;

/**
     * 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-NULL <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 = 0;

/**
     * Gets the set of time zone rules valid at the specified time.  Some known external time zone
     * implementations are not capable to handle historic time zone rule changes.  Also some
     * implementations can only handle certain type of rule definitions.
     * If this time zone does not use any daylight saving time within about 1 year from the specified
     * time, only the <code>InitialTimeZone</code> is returned.  Otherwise, the rule for standard
     * time and daylight saving time transitions are returned in addition to the
     * <code>InitialTimeZoneRule</code>.  The standard and daylight saving time transition rules are
     * represented by <code>AnnualTimeZoneRule</code> with <code>DateTimeRule::DOW</code> for its date
     * rule and <code>DateTimeRule::WALL_TIME</code> for its time rule.  Because daylight saving time
     * rule is changing time to time in many time zones and also mapping a transition time rule to
     * different type is lossy transformation, the set of rules returned by this method may be valid
     * for short period of time.
     * The time zone rule objects returned by this method is owned by the caller, so the caller is
     * responsible for deleting them after use.
     * @param date      The date used for extracting time zone rules.
     * @param initial   Receives the <code>InitialTimeZone</code>, always not NULL.
     * @param std       Receives the <code>AnnualTimeZoneRule</code> for standard time transitions.
     *                  When this time time zone does not observe daylight saving times around the
     *                  specified date, NULL is set.
     * @param dst       Receives the <code>AnnualTimeZoneRule</code> for daylight saving time
     *                  transitions.  When this time zone does not observer daylight saving times
     *                  around the specified date, NULL is set.
     * @param status    Receives error status code.
     * @stable ICU 3.8
     */
    virtual void getSimpleRulesNear(UDate date, InitialTimeZoneRule*& initial,
        AnnualTimeZoneRule*& std, AnnualTimeZoneRule*& dst, UErrorCode& status) const;

#ifndef U_HIDE_INTERNAL_API
    /**
     * The time type option bit flags used by getOffsetFromLocal
     * @internal
     */
    enum {
        kStandard = 0x01,
        kDaylight = 0x03,
        kFormer = 0x04,
        kLatter = 0x0C
    };
#endif  /* U_HIDE_INTERNAL_API */

/**
     * 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;

protected:

#ifndef U_HIDE_INTERNAL_API
    /**
     * The time type option bit masks used by getOffsetFromLocal
     * @internal
     */
    enum {
        kStdDstMask = kDaylight,
        kFormerLatterMask = kLatter
    };
#endif  /* U_HIDE_INTERNAL_API */

/**
     * Default constructor.
     * @stable ICU 3.8
     */
    BasicTimeZone();

/**
     * Construct a timezone with a given ID.
     * @param id a system time zone ID
     * @stable ICU 3.8
     */
    BasicTimeZone(const UnicodeString &id);

/**
     * Copy constructor.
     * @param source the object to be copied.
     * @stable ICU 3.8
     */
    BasicTimeZone(const BasicTimeZone& source);

/**
     * Gets the set of TimeZoneRule instances applicable to the specified time and after.
     * @param start     The start date used for extracting time zone rules
     * @param initial   Receives the InitialTimeZone, always not NULL
     * @param transitionRules   Receives the transition rules, could be NULL
     * @param status    Receives error status code
     */
    void getTimeZoneRulesAfter(UDate start, InitialTimeZoneRule*& initial, UVector*& transitionRules,
        UErrorCode& status) const;
};

U_NAMESPACE_END

#endif /* #if !UCONFIG_NO_FORMATTING */

#endif // BASICTZ_H

//eof

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