basictz.h

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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 BASICTZ_H
#define BASICTZ_H

#include "unicode/utypes.h"

#if U_SHOW_CPLUSPLUS_API

#if !UCONFIG_NO_FORMATTING

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

U_NAMESPACE_BEGIN

// forward declarations
class UVector;

class U_I18N_API BasicTimeZone: public TimeZone {
public:
    virtual ~BasicTimeZone();

    virtual BasicTimeZone* clone() const override = 0;

    virtual UBool getNextTransition(UDate base, UBool inclusive, TimeZoneTransition& result) const = 0;

    virtual UBool getPreviousTransition(UDate base, UBool inclusive, TimeZoneTransition& result) const = 0;

    virtual UBool hasEquivalentTransitions(const BasicTimeZone& tz, UDate start, UDate end,
        UBool ignoreDstAmount, UErrorCode& ec) const;

    virtual int32_t countTransitionRules(UErrorCode& status) const = 0;

    virtual void getTimeZoneRules(const InitialTimeZoneRule*& initial,
        const TimeZoneRule* trsrules[], int32_t& trscount, UErrorCode& status) const = 0;

    virtual void getSimpleRulesNear(UDate date, InitialTimeZoneRule*& initial,
        AnnualTimeZoneRule*& std, AnnualTimeZoneRule*& dst, UErrorCode& status) const;

    virtual void getOffsetFromLocal(
        UDate date, UTimeZoneLocalOption nonExistingTimeOpt,
        UTimeZoneLocalOption duplicatedTimeOpt, int32_t& rawOffset,
        int32_t& dstOffset, UErrorCode& status) const;


#ifndef U_HIDE_INTERNAL_API

    enum {
        kStandard = 0x01,
        kDaylight = 0x03,
        kFormer = 0x04, /* UCAL_TZ_LOCAL_FORMER */
        kLatter = 0x0C  /* UCAL_TZ_LOCAL_LATTER */
    };

    void getOffsetFromLocal(UDate date, int32_t nonExistingTimeOpt, int32_t duplicatedTimeOpt,
        int32_t& rawOffset, int32_t& dstOffset, UErrorCode& status) const;
#endif  /* U_HIDE_INTERNAL_API */

protected:

#ifndef U_HIDE_INTERNAL_API

    static constexpr int32_t kStdDstMask = kDaylight;
    static constexpr int32_t kFormerLatterMask = kLatter;
#endif  /* U_HIDE_INTERNAL_API */

    BasicTimeZone();

    BasicTimeZone(const UnicodeString &id);

    BasicTimeZone(const BasicTimeZone& source);

    BasicTimeZone& operator=(const BasicTimeZone&) = default;

    void getTimeZoneRulesAfter(UDate start, InitialTimeZoneRule*& initial, UVector*& transitionRules,
        UErrorCode& status) const;
};

U_NAMESPACE_END

#endif /* #if !UCONFIG_NO_FORMATTING */

#endif /* U_SHOW_CPLUSPLUS_API */

#endif // BASICTZ_H

//eof

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