tzrule.h

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// © 2016 and later: Unicode, Inc. and others.
// License & terms of use: http://www.unicode.org/copyright.html
/*
*******************************************************************************
* Copyright (C) 2007-2008, International Business Machines Corporation and    *
* others. All Rights Reserved.                                                *
*******************************************************************************
*/
#ifndef TZRULE_H
#define TZRULE_H
 
#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
 
class U_I18N_API TimeZoneRule : public UObject {
public:
    virtual ~TimeZoneRule();
 
    virtual TimeZoneRule* clone() const = 0;
 
    virtual bool operator==(const TimeZoneRule& that) const;
 
    virtual bool operator!=(const TimeZoneRule& that) const;
 
    UnicodeString& getName(UnicodeString& name) const;
 
    int32_t getRawOffset(void) const;
 
    int32_t getDSTSavings(void) const;
 
    virtual UBool isEquivalentTo(const TimeZoneRule& other) const;
 
    virtual UBool getFirstStart(int32_t prevRawOffset, int32_t prevDSTSavings, UDate& result) const = 0;
 
    virtual UBool getFinalStart(int32_t prevRawOffset, int32_t prevDSTSavings, UDate& result) const = 0;
 
    virtual UBool getNextStart(UDate base, int32_t prevRawOffset, int32_t prevDSTSavings,
        UBool inclusive, UDate& result) const = 0;
 
    virtual UBool getPreviousStart(UDate base, int32_t prevRawOffset, int32_t prevDSTSavings,
        UBool inclusive, UDate& result) const = 0;
 
protected:
 
    TimeZoneRule(const UnicodeString& name, int32_t rawOffset, int32_t dstSavings);
 
    TimeZoneRule(const TimeZoneRule& source);
 
    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
};
 
class U_I18N_API InitialTimeZoneRule : public TimeZoneRule {
public:
    InitialTimeZoneRule(const UnicodeString& name, int32_t rawOffset, int32_t dstSavings);
 
    InitialTimeZoneRule(const InitialTimeZoneRule& source);
 
    virtual ~InitialTimeZoneRule();
 
    virtual InitialTimeZoneRule* clone() const override;
 
    InitialTimeZoneRule& operator=(const InitialTimeZoneRule& right);
 
    virtual bool operator==(const TimeZoneRule& that) const override;
 
    virtual bool operator!=(const TimeZoneRule& that) const override;
 
    virtual UBool isEquivalentTo(const TimeZoneRule& that) const override;
 
    virtual UBool getFirstStart(int32_t prevRawOffset, int32_t prevDSTSavings, UDate& result) const override;
 
    virtual UBool getFinalStart(int32_t prevRawOffset, int32_t prevDSTSavings, UDate& result) const override;
 
    virtual UBool getNextStart(UDate base, int32_t prevRawOffset, int32_t prevDSTSavings,
        UBool inclusive, UDate& result) const override;
 
    virtual UBool getPreviousStart(UDate base, int32_t prevRawOffset, int32_t prevDSTSavings,
        UBool inclusive, UDate& result) const override;
 
public:
    static UClassID U_EXPORT2 getStaticClassID(void);
 
    virtual UClassID getDynamicClassID(void) const override;
};
 
class U_I18N_API AnnualTimeZoneRule : public TimeZoneRule {
public:
    static const int32_t MAX_YEAR;
 
    AnnualTimeZoneRule(const UnicodeString& name, int32_t rawOffset, int32_t dstSavings,
            const DateTimeRule& dateTimeRule, int32_t startYear, int32_t endYear);
 
    AnnualTimeZoneRule(const UnicodeString& name, int32_t rawOffset, int32_t dstSavings,
            DateTimeRule* dateTimeRule, int32_t startYear, int32_t endYear);
 
    AnnualTimeZoneRule(const AnnualTimeZoneRule& source);
 
    virtual ~AnnualTimeZoneRule();
 
    virtual AnnualTimeZoneRule* clone() const override;
 
    AnnualTimeZoneRule& operator=(const AnnualTimeZoneRule& right);
 
    virtual bool operator==(const TimeZoneRule& that) const override;
 
    virtual bool operator!=(const TimeZoneRule& that) const override;
 
    const DateTimeRule* getRule(void) const;
 
    int32_t getStartYear(void) const;
 
    int32_t getEndYear(void) const;
 
    UBool getStartInYear(int32_t year, int32_t prevRawOffset, int32_t prevDSTSavings, UDate& result) const;
 
    virtual UBool isEquivalentTo(const TimeZoneRule& that) const override;
 
    virtual UBool getFirstStart(int32_t prevRawOffset, int32_t prevDSTSavings, UDate& result) const override;
 
    virtual UBool getFinalStart(int32_t prevRawOffset, int32_t prevDSTSavings, UDate& result) const override;
 
    virtual UBool getNextStart(UDate base, int32_t prevRawOffset, int32_t prevDSTSavings,
        UBool inclusive, UDate& result) const override;
 
    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:
    static UClassID U_EXPORT2 getStaticClassID(void);
 
    virtual UClassID getDynamicClassID(void) const override;
};
 
class U_I18N_API TimeArrayTimeZoneRule : public TimeZoneRule {
public:
    TimeArrayTimeZoneRule(const UnicodeString& name, int32_t rawOffset, int32_t dstSavings,
        const UDate* startTimes, int32_t numStartTimes, DateTimeRule::TimeRuleType timeRuleType);
 
    TimeArrayTimeZoneRule(const TimeArrayTimeZoneRule& source);
 
    virtual ~TimeArrayTimeZoneRule();
 
    virtual TimeArrayTimeZoneRule* clone() const override;
 
    TimeArrayTimeZoneRule& operator=(const TimeArrayTimeZoneRule& right);
 
    virtual bool operator==(const TimeZoneRule& that) const override;
 
    virtual bool operator!=(const TimeZoneRule& that) const override;
 
    DateTimeRule::TimeRuleType getTimeType(void) const;
 
    UBool getStartTimeAt(int32_t index, UDate& result) const;
 
    int32_t countStartTimes(void) const;
 
    virtual UBool isEquivalentTo(const TimeZoneRule& that) const override;
 
    virtual UBool getFirstStart(int32_t prevRawOffset, int32_t prevDSTSavings, UDate& result) const override;
 
    virtual UBool getFinalStart(int32_t prevRawOffset, int32_t prevDSTSavings, UDate& result) const override;
 
    virtual UBool getNextStart(UDate base, int32_t prevRawOffset, int32_t prevDSTSavings,
        UBool inclusive, UDate& result) const override;
 
    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:
    static UClassID U_EXPORT2 getStaticClassID(void);
 
    virtual UClassID getDynamicClassID(void) const override;
};
 
 
U_NAMESPACE_END
 
#endif /* #if !UCONFIG_NO_FORMATTING */
 
#endif /* U_SHOW_CPLUSPLUS_API */
 
#endif // TZRULE_H
 
//eof