tzfmt.h

Go to the documentation of this file.

// © 2016 and later: Unicode, Inc. and others.
// License & terms of use: http://www.unicode.org/copyright.html
/*
*******************************************************************************
* Copyright (C) 2011-2015, International Business Machines Corporation and
* others. All Rights Reserved.
*******************************************************************************
*/
#ifndef __TZFMT_H
#define __TZFMT_H

#include "unicode/utypes.h"

#if U_SHOW_CPLUSPLUS_API

#if !UCONFIG_NO_FORMATTING

#include "unicode/format.h"
#include "unicode/timezone.h"
#include "unicode/tznames.h"

U_CDECL_BEGIN
typedef enum UTimeZoneFormatStyle {
    UTZFMT_STYLE_GENERIC_LOCATION,
    UTZFMT_STYLE_GENERIC_LONG,
    UTZFMT_STYLE_GENERIC_SHORT,
    UTZFMT_STYLE_SPECIFIC_LONG,
    UTZFMT_STYLE_SPECIFIC_SHORT,
    UTZFMT_STYLE_LOCALIZED_GMT,
    UTZFMT_STYLE_LOCALIZED_GMT_SHORT,
    UTZFMT_STYLE_ISO_BASIC_SHORT,
    UTZFMT_STYLE_ISO_BASIC_LOCAL_SHORT,
    UTZFMT_STYLE_ISO_BASIC_FIXED,
    UTZFMT_STYLE_ISO_BASIC_LOCAL_FIXED,
    UTZFMT_STYLE_ISO_BASIC_FULL,
    UTZFMT_STYLE_ISO_BASIC_LOCAL_FULL,
    UTZFMT_STYLE_ISO_EXTENDED_FIXED,
    UTZFMT_STYLE_ISO_EXTENDED_LOCAL_FIXED,
    UTZFMT_STYLE_ISO_EXTENDED_FULL,
    UTZFMT_STYLE_ISO_EXTENDED_LOCAL_FULL,
    UTZFMT_STYLE_ZONE_ID,
    UTZFMT_STYLE_ZONE_ID_SHORT,
    UTZFMT_STYLE_EXEMPLAR_LOCATION
} UTimeZoneFormatStyle;

typedef enum UTimeZoneFormatGMTOffsetPatternType {
    UTZFMT_PAT_POSITIVE_HM,
    UTZFMT_PAT_POSITIVE_HMS,
    UTZFMT_PAT_NEGATIVE_HM,
    UTZFMT_PAT_NEGATIVE_HMS,
    UTZFMT_PAT_POSITIVE_H,
    UTZFMT_PAT_NEGATIVE_H,

    /* The following cannot be #ifndef U_HIDE_INTERNAL_API, needed for other .h declarations */
    UTZFMT_PAT_COUNT = 6
} UTimeZoneFormatGMTOffsetPatternType;

typedef enum UTimeZoneFormatTimeType {
    UTZFMT_TIME_TYPE_UNKNOWN,
    UTZFMT_TIME_TYPE_STANDARD,
    UTZFMT_TIME_TYPE_DAYLIGHT
} UTimeZoneFormatTimeType;

typedef enum UTimeZoneFormatParseOption {
    UTZFMT_PARSE_OPTION_NONE        = 0x00,
    UTZFMT_PARSE_OPTION_ALL_STYLES  = 0x01,
    UTZFMT_PARSE_OPTION_TZ_DATABASE_ABBREVIATIONS = 0x02
} UTimeZoneFormatParseOption;

U_CDECL_END

U_NAMESPACE_BEGIN

class TimeZoneGenericNames;
class TZDBTimeZoneNames;
class UVector;

class U_I18N_API TimeZoneFormat : public Format {
public:
    TimeZoneFormat(const TimeZoneFormat& other);

    virtual ~TimeZoneFormat();

    TimeZoneFormat& operator=(const TimeZoneFormat& other);

    virtual bool operator==(const Format& other) const override;

    virtual TimeZoneFormat* clone() const override;

    static TimeZoneFormat* U_EXPORT2 createInstance(const Locale& locale, UErrorCode& status);

    const TimeZoneNames* getTimeZoneNames() const;

    void adoptTimeZoneNames(TimeZoneNames *tznames);

    void setTimeZoneNames(const TimeZoneNames &tznames);

    UnicodeString& getGMTPattern(UnicodeString& pattern) const;

    void setGMTPattern(const UnicodeString& pattern, UErrorCode& status);

    UnicodeString& getGMTOffsetPattern(UTimeZoneFormatGMTOffsetPatternType type, UnicodeString& pattern) const;

    void setGMTOffsetPattern(UTimeZoneFormatGMTOffsetPatternType type, const UnicodeString& pattern, UErrorCode& status);

    UnicodeString& getGMTOffsetDigits(UnicodeString& digits) const;

    void setGMTOffsetDigits(const UnicodeString& digits, UErrorCode& status);

    UnicodeString& getGMTZeroFormat(UnicodeString& gmtZeroFormat) const;

    void setGMTZeroFormat(const UnicodeString& gmtZeroFormat, UErrorCode& status);

    uint32_t getDefaultParseOptions(void) const;

    void setDefaultParseOptions(uint32_t flags);

    UnicodeString& formatOffsetISO8601Basic(int32_t offset, UBool useUtcIndicator, UBool isShort, UBool ignoreSeconds,
        UnicodeString& result, UErrorCode& status) const;

    UnicodeString& formatOffsetISO8601Extended(int32_t offset, UBool useUtcIndicator, UBool isShort, UBool ignoreSeconds,
        UnicodeString& result, UErrorCode& status) const;

    UnicodeString& formatOffsetLocalizedGMT(int32_t offset, UnicodeString& result, UErrorCode& status) const;

    UnicodeString& formatOffsetShortLocalizedGMT(int32_t offset, UnicodeString& result, UErrorCode& status) const;

    using Format::format;

    virtual UnicodeString& format(UTimeZoneFormatStyle style, const TimeZone& tz, UDate date,
        UnicodeString& name, UTimeZoneFormatTimeType* timeType = nullptr) const;

    int32_t parseOffsetISO8601(const UnicodeString& text, ParsePosition& pos) const;

    int32_t parseOffsetLocalizedGMT(const UnicodeString& text, ParsePosition& pos) const;

    int32_t parseOffsetShortLocalizedGMT(const UnicodeString& text, ParsePosition& pos) const;

    virtual TimeZone* parse(UTimeZoneFormatStyle style, const UnicodeString& text, ParsePosition& pos,
        int32_t parseOptions, UTimeZoneFormatTimeType* timeType = nullptr) const;

    TimeZone* parse(UTimeZoneFormatStyle style, const UnicodeString& text, ParsePosition& pos,
        UTimeZoneFormatTimeType* timeType = nullptr) const;

    /* ----------------------------------------------
     * Format APIs
     * ---------------------------------------------- */

    virtual UnicodeString& format(const Formattable& obj, UnicodeString& appendTo,
        FieldPosition& pos, UErrorCode& status) const override;

    virtual void parseObject(const UnicodeString& source, Formattable& result, ParsePosition& parse_pos) const override;

    static UClassID U_EXPORT2 getStaticClassID(void);

    virtual UClassID getDynamicClassID() const override;

protected:
    TimeZoneFormat(const Locale& locale, UErrorCode& status);

private:
    /* Locale of this object */
    Locale fLocale;

    /* Stores the region (could be implicit default) */
    char fTargetRegion[ULOC_COUNTRY_CAPACITY];

    /* TimeZoneNames object used by this formatter */
    TimeZoneNames* fTimeZoneNames;

    /* TimeZoneGenericNames object used by this formatter - lazily instantiated */
    TimeZoneGenericNames* fTimeZoneGenericNames;

    /* Localized GMT format pattern - e.g. "GMT{0}" */
    UnicodeString fGMTPattern;

    /* Array of offset patterns used by Localized GMT format - e.g. "+HH:mm" */
    UnicodeString fGMTOffsetPatterns[UTZFMT_PAT_COUNT];

    /* Localized decimal digits used by Localized GMT format */
    UChar32 fGMTOffsetDigits[10];

    /* Localized GMT zero format - e.g. "GMT" */
    UnicodeString fGMTZeroFormat;

    /* Bit flags representing parse options */
    uint32_t fDefParseOptionFlags;

    /* Constant parts of GMT format pattern, populated from localized GMT format pattern*/
    UnicodeString fGMTPatternPrefix;    /* Substring before {0} */
    UnicodeString fGMTPatternSuffix;    /* Substring after {0} */

    /* Compiled offset patterns generated from fGMTOffsetPatterns[] */
    UVector* fGMTOffsetPatternItems[UTZFMT_PAT_COUNT];

    UBool fAbuttingOffsetHoursAndMinutes;

    /* TZDBTimeZoneNames object used for parsing */
    TZDBTimeZoneNames* fTZDBTimeZoneNames;

    UnicodeString& formatSpecific(const TimeZone& tz, UTimeZoneNameType stdType, UTimeZoneNameType dstType,
        UDate date, UnicodeString& name, UTimeZoneFormatTimeType *timeType) const;

    UnicodeString& formatGeneric(const TimeZone& tz, int32_t genType, UDate date, UnicodeString& name) const;

    const TimeZoneGenericNames* getTimeZoneGenericNames(UErrorCode& status) const;

    const TZDBTimeZoneNames* getTZDBTimeZoneNames(UErrorCode& status) const;

    UnicodeString& formatExemplarLocation(const TimeZone& tz, UnicodeString& name) const;

    enum OffsetFields {
        FIELDS_H,
        FIELDS_HM,
        FIELDS_HMS
    };

    void initGMTPattern(const UnicodeString& gmtPattern, UErrorCode& status);

    static UVector* parseOffsetPattern(const UnicodeString& pattern, OffsetFields required, UErrorCode& status);

    static UnicodeString& expandOffsetPattern(const UnicodeString& offsetHM, UnicodeString& result, UErrorCode& status);

    static UnicodeString& truncateOffsetPattern(const UnicodeString& offsetHM, UnicodeString& result, UErrorCode& status);

    static UBool toCodePoints(const UnicodeString& str, UChar32* codeArray, int32_t capacity);

    UnicodeString& formatOffsetISO8601(int32_t offset, UBool isBasic, UBool useUtcIndicator,
        UBool isShort, UBool ignoreSeconds, UnicodeString& result, UErrorCode& status) const;

    UnicodeString& formatOffsetLocalizedGMT(int32_t offset, UBool isShort, UnicodeString& result, UErrorCode& status) const;

    int32_t parseOffsetISO8601(const UnicodeString& text, ParsePosition& pos, UBool extendedOnly,
        UBool* hasDigitOffset = nullptr) const;

    void appendOffsetDigits(UnicodeString& buf, int32_t n, uint8_t minDigits) const;

    int32_t parseOffsetLocalizedGMT(const UnicodeString& text, ParsePosition& pos,
        UBool isShort, UBool* hasDigitOffset) const;

    int32_t parseOffsetLocalizedGMTPattern(const UnicodeString& text, int32_t start,
        UBool isShort, int32_t& parsedLen) const;

    int32_t parseOffsetFields(const UnicodeString& text, int32_t start, UBool isShort, int32_t& parsedLen) const;

    int32_t parseOffsetFieldsWithPattern(const UnicodeString& text, int32_t start,
        UVector* patternItems, UBool forceSingleHourDigit, int32_t& hour, int32_t& min, int32_t& sec) const;

    int32_t parseAbuttingOffsetFields(const UnicodeString& text, int32_t start, int32_t& parsedLen) const;

    int32_t parseOffsetDefaultLocalizedGMT(const UnicodeString& text, int start, int32_t& parsedLen) const;

    int32_t parseDefaultOffsetFields(const UnicodeString& text, int32_t start, char16_t separator,
        int32_t& parsedLen) const;

    int32_t parseOffsetFieldWithLocalizedDigits(const UnicodeString& text, int32_t start,
        uint8_t minDigits, uint8_t maxDigits, uint16_t minVal, uint16_t maxVal, int32_t& parsedLen) const;

    int32_t parseSingleLocalizedDigit(const UnicodeString& text, int32_t start, int32_t& len) const;

    static UnicodeString& formatOffsetWithAsciiDigits(int32_t offset, char16_t sep,
        OffsetFields minFields, OffsetFields maxFields, UnicodeString& result);

    static int32_t parseAbuttingAsciiOffsetFields(const UnicodeString& text, ParsePosition& pos,
        OffsetFields minFields, OffsetFields maxFields, UBool fixedHourWidth);

    static int32_t parseAsciiOffsetFields(const UnicodeString& text, ParsePosition& pos, char16_t sep,
        OffsetFields minFields, OffsetFields maxFields);

    static UnicodeString& unquote(const UnicodeString& pattern, UnicodeString& result);

    void initGMTOffsetPatterns(UErrorCode& status);

    void checkAbuttingHoursAndMinutes();

    TimeZone* createTimeZoneForOffset(int32_t offset) const;

    static UTimeZoneFormatTimeType getTimeType(UTimeZoneNameType nameType);

    UnicodeString& getTimeZoneID(const TimeZoneNames::MatchInfoCollection* matches, int32_t idx, UnicodeString& tzID) const;


    UnicodeString& parseZoneID(const UnicodeString& text, ParsePosition& pos, UnicodeString& tzID) const;

    UnicodeString& parseShortZoneID(const UnicodeString& text, ParsePosition& pos, UnicodeString& tzID) const;

    UnicodeString& parseExemplarLocation(const UnicodeString& text, ParsePosition& pos, UnicodeString& tzID) const;
};

U_NAMESPACE_END

#endif /* !UCONFIG_NO_FORMATTING */

#endif /* U_SHOW_CPLUSPLUS_API */

#endif