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diff --git a/intl/icu/source/i18n/unicode/tzfmt.h b/intl/icu/source/i18n/unicode/tzfmt.h new file mode 100644 index 0000000000..4bd80e0e34 --- /dev/null +++ b/intl/icu/source/i18n/unicode/tzfmt.h @@ -0,0 +1,1102 @@ +// © 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 + +/** + * \file + * \brief C++ API: TimeZoneFormat + */ + +#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 +/** + * Constants for time zone display format style used by format/parse APIs + * in TimeZoneFormat. + * @stable ICU 50 + */ +typedef enum UTimeZoneFormatStyle { + /** + * Generic location format, such as "United States Time (New York)", "Italy Time" + * @stable ICU 50 + */ + UTZFMT_STYLE_GENERIC_LOCATION, + /** + * Generic long non-location format, such as "Eastern Time". + * @stable ICU 50 + */ + UTZFMT_STYLE_GENERIC_LONG, + /** + * Generic short non-location format, such as "ET". + * @stable ICU 50 + */ + UTZFMT_STYLE_GENERIC_SHORT, + /** + * Specific long format, such as "Eastern Standard Time". + * @stable ICU 50 + */ + UTZFMT_STYLE_SPECIFIC_LONG, + /** + * Specific short format, such as "EST", "PDT". + * @stable ICU 50 + */ + UTZFMT_STYLE_SPECIFIC_SHORT, + /** + * Localized GMT offset format, such as "GMT-05:00", "UTC+0100" + * @stable ICU 50 + */ + UTZFMT_STYLE_LOCALIZED_GMT, + /** + * Short localized GMT offset format, such as "GMT-5", "UTC+1:30" + * This style is equivalent to the LDML date format pattern "O". + * @stable ICU 51 + */ + UTZFMT_STYLE_LOCALIZED_GMT_SHORT, + /** + * Short ISO 8601 local time difference (basic format) or the UTC indicator. + * For example, "-05", "+0530", and "Z"(UTC). + * This style is equivalent to the LDML date format pattern "X". + * @stable ICU 51 + */ + UTZFMT_STYLE_ISO_BASIC_SHORT, + /** + * Short ISO 8601 locale time difference (basic format). + * For example, "-05" and "+0530". + * This style is equivalent to the LDML date format pattern "x". + * @stable ICU 51 + */ + UTZFMT_STYLE_ISO_BASIC_LOCAL_SHORT, + /** + * Fixed width ISO 8601 local time difference (basic format) or the UTC indicator. + * For example, "-0500", "+0530", and "Z"(UTC). + * This style is equivalent to the LDML date format pattern "XX". + * @stable ICU 51 + */ + UTZFMT_STYLE_ISO_BASIC_FIXED, + /** + * Fixed width ISO 8601 local time difference (basic format). + * For example, "-0500" and "+0530". + * This style is equivalent to the LDML date format pattern "xx". + * @stable ICU 51 + */ + UTZFMT_STYLE_ISO_BASIC_LOCAL_FIXED, + /** + * ISO 8601 local time difference (basic format) with optional seconds field, or the UTC indicator. + * For example, "-0500", "+052538", and "Z"(UTC). + * This style is equivalent to the LDML date format pattern "XXXX". + * @stable ICU 51 + */ + UTZFMT_STYLE_ISO_BASIC_FULL, + /** + * ISO 8601 local time difference (basic format) with optional seconds field. + * For example, "-0500" and "+052538". + * This style is equivalent to the LDML date format pattern "xxxx". + * @stable ICU 51 + */ + UTZFMT_STYLE_ISO_BASIC_LOCAL_FULL, + /** + * Fixed width ISO 8601 local time difference (extended format) or the UTC indicator. + * For example, "-05:00", "+05:30", and "Z"(UTC). + * This style is equivalent to the LDML date format pattern "XXX". + * @stable ICU 51 + */ + UTZFMT_STYLE_ISO_EXTENDED_FIXED, + /** + * Fixed width ISO 8601 local time difference (extended format). + * For example, "-05:00" and "+05:30". + * This style is equivalent to the LDML date format pattern "xxx" and "ZZZZZ". + * @stable ICU 51 + */ + UTZFMT_STYLE_ISO_EXTENDED_LOCAL_FIXED, + /** + * ISO 8601 local time difference (extended format) with optional seconds field, or the UTC indicator. + * For example, "-05:00", "+05:25:38", and "Z"(UTC). + * This style is equivalent to the LDML date format pattern "XXXXX". + * @stable ICU 51 + */ + UTZFMT_STYLE_ISO_EXTENDED_FULL, + /** + * ISO 8601 local time difference (extended format) with optional seconds field. + * For example, "-05:00" and "+05:25:38". + * This style is equivalent to the LDML date format pattern "xxxxx". + * @stable ICU 51 + */ + UTZFMT_STYLE_ISO_EXTENDED_LOCAL_FULL, + /** + * Time Zone ID, such as "America/Los_Angeles". + * @stable ICU 51 + */ + UTZFMT_STYLE_ZONE_ID, + /** + * Short Time Zone ID (BCP 47 Unicode location extension, time zone type value), such as "uslax". + * @stable ICU 51 + */ + UTZFMT_STYLE_ZONE_ID_SHORT, + /** + * Exemplar location, such as "Los Angeles" and "Paris". + * @stable ICU 51 + */ + UTZFMT_STYLE_EXEMPLAR_LOCATION +} UTimeZoneFormatStyle; + +/** + * Constants for GMT offset pattern types. + * @stable ICU 50 + */ +typedef enum UTimeZoneFormatGMTOffsetPatternType { + /** + * Positive offset with hours and minutes fields + * @stable ICU 50 + */ + UTZFMT_PAT_POSITIVE_HM, + /** + * Positive offset with hours, minutes and seconds fields + * @stable ICU 50 + */ + UTZFMT_PAT_POSITIVE_HMS, + /** + * Negative offset with hours and minutes fields + * @stable ICU 50 + */ + UTZFMT_PAT_NEGATIVE_HM, + /** + * Negative offset with hours, minutes and seconds fields + * @stable ICU 50 + */ + UTZFMT_PAT_NEGATIVE_HMS, + /** + * Positive offset with hours field + * @stable ICU 51 + */ + UTZFMT_PAT_POSITIVE_H, + /** + * Negative offset with hours field + * @stable ICU 51 + */ + UTZFMT_PAT_NEGATIVE_H, + + /* The following cannot be #ifndef U_HIDE_INTERNAL_API, needed for other .h declarations */ + /** + * Number of UTimeZoneFormatGMTOffsetPatternType types. + * @internal + */ + UTZFMT_PAT_COUNT = 6 +} UTimeZoneFormatGMTOffsetPatternType; + +/** + * Constants for time types used by TimeZoneFormat APIs for + * receiving time type (standard time, daylight time or unknown). + * @stable ICU 50 + */ +typedef enum UTimeZoneFormatTimeType { + /** + * Unknown + * @stable ICU 50 + */ + UTZFMT_TIME_TYPE_UNKNOWN, + /** + * Standard time + * @stable ICU 50 + */ + UTZFMT_TIME_TYPE_STANDARD, + /** + * Daylight saving time + * @stable ICU 50 + */ + UTZFMT_TIME_TYPE_DAYLIGHT +} UTimeZoneFormatTimeType; + +/** + * Constants for parse option flags, used for specifying optional parse behavior. + * @stable ICU 50 + */ +typedef enum UTimeZoneFormatParseOption { + /** + * No option. + * @stable ICU 50 + */ + UTZFMT_PARSE_OPTION_NONE = 0x00, + /** + * When a time zone display name is not found within a set of display names + * used for the specified style, look for the name from display names used + * by other styles. + * @stable ICU 50 + */ + UTZFMT_PARSE_OPTION_ALL_STYLES = 0x01, + /** + * When parsing a time zone display name in \link UTZFMT_STYLE_SPECIFIC_SHORT \endlink, + * look for the IANA tz database compatible zone abbreviations in addition + * to the localized names coming from the icu::TimeZoneNames currently + * used by the icu::TimeZoneFormat. + * @stable ICU 54 + */ + UTZFMT_PARSE_OPTION_TZ_DATABASE_ABBREVIATIONS = 0x02 +} UTimeZoneFormatParseOption; + +U_CDECL_END + +U_NAMESPACE_BEGIN + +class TimeZoneGenericNames; +class TZDBTimeZoneNames; +class UVector; + +/** + * <code>TimeZoneFormat</code> supports time zone display name formatting and parsing. + * An instance of TimeZoneFormat works as a subformatter of {@link SimpleDateFormat}, + * but you can also directly get a new instance of <code>TimeZoneFormat</code> and + * formatting/parsing time zone display names. + * <p> + * ICU implements the time zone display names defined by <a href="http://www.unicode.org/reports/tr35/">UTS#35 + * Unicode Locale Data Markup Language (LDML)</a>. {@link TimeZoneNames} represents the + * time zone display name data model and this class implements the algorithm for actual + * formatting and parsing. + * + * @see SimpleDateFormat + * @see TimeZoneNames + * @stable ICU 50 + */ +class U_I18N_API TimeZoneFormat : public Format { +public: + /** + * Copy constructor. + * @stable ICU 50 + */ + TimeZoneFormat(const TimeZoneFormat& other); + + /** + * Destructor. + * @stable ICU 50 + */ + virtual ~TimeZoneFormat(); + + /** + * Assignment operator. + * @stable ICU 50 + */ + TimeZoneFormat& operator=(const TimeZoneFormat& other); + + /** + * Return true if the given Format objects are semantically equal. + * Objects of different subclasses are considered unequal. + * @param other The object to be compared with. + * @return Return true if the given Format objects are semantically equal. + * Objects of different subclasses are considered unequal. + * @stable ICU 50 + */ + virtual bool operator==(const Format& other) const override; + + /** + * Clone this object polymorphically. The caller is responsible + * for deleting the result when done. + * @return A copy of the object + * @stable ICU 50 + */ + virtual TimeZoneFormat* clone() const override; + + /** + * Creates an instance of <code>TimeZoneFormat</code> for the given locale. + * @param locale The locale. + * @param status Receives the status. + * @return An instance of <code>TimeZoneFormat</code> for the given locale, + * owned by the caller. + * @stable ICU 50 + */ + static TimeZoneFormat* U_EXPORT2 createInstance(const Locale& locale, UErrorCode& status); + + /** + * Returns the time zone display name data used by this instance. + * @return The time zone display name data. + * @stable ICU 50 + */ + const TimeZoneNames* getTimeZoneNames() const; + + /** + * Sets the time zone display name data to this format instance. + * The caller should not delete the TimeZoenNames object after it is adopted + * by this call. + * @param tznames TimeZoneNames object to be adopted. + * @stable ICU 50 + */ + void adoptTimeZoneNames(TimeZoneNames *tznames); + + /** + * Sets the time zone display name data to this format instance. + * @param tznames TimeZoneNames object to be set. + * @stable ICU 50 + */ + void setTimeZoneNames(const TimeZoneNames &tznames); + + /** + * Returns the localized GMT format pattern. + * @param pattern Receives the localized GMT format pattern. + * @return A reference to the result pattern. + * @see #setGMTPattern + * @stable ICU 50 + */ + UnicodeString& getGMTPattern(UnicodeString& pattern) const; + + /** + * Sets the localized GMT format pattern. The pattern must contain + * a single argument {0}, for example "GMT {0}". + * @param pattern The localized GMT format pattern to be used by this object. + * @param status Receives the status. + * @see #getGMTPattern + * @stable ICU 50 + */ + void setGMTPattern(const UnicodeString& pattern, UErrorCode& status); + + /** + * Returns the offset pattern used for localized GMT format. + * @param type The offset pattern type enum. + * @param pattern Receives the offset pattern. + * @return A reference to the result pattern. + * @see #setGMTOffsetPattern + * @stable ICU 50 + */ + UnicodeString& getGMTOffsetPattern(UTimeZoneFormatGMTOffsetPatternType type, UnicodeString& pattern) const; + + /** + * Sets the offset pattern for the given offset type. + * @param type The offset pattern type enum. + * @param pattern The offset pattern used for localized GMT format for the type. + * @param status Receives the status. + * @see #getGMTOffsetPattern + * @stable ICU 50 + */ + void setGMTOffsetPattern(UTimeZoneFormatGMTOffsetPatternType type, const UnicodeString& pattern, UErrorCode& status); + + /** + * Returns the decimal digit characters used for localized GMT format. + * The return string contains exactly 10 code points (may include Unicode + * supplementary character) representing digit 0 to digit 9 in the ascending + * order. + * @param digits Receives the decimal digits used for localized GMT format. + * @see #setGMTOffsetDigits + * @stable ICU 50 + */ + UnicodeString& getGMTOffsetDigits(UnicodeString& digits) const; + + /** + * Sets the decimal digit characters used for localized GMT format. + * The input <code>digits</code> must contain exactly 10 code points + * (Unicode supplementary characters are also allowed) representing + * digit 0 to digit 9 in the ascending order. When the input <code>digits</code> + * does not satisfy the condition, <code>U_ILLEGAL_ARGUMENT_ERROR</code> + * will be set to the return status. + * @param digits The decimal digits used for localized GMT format. + * @param status Receives the status. + * @see #getGMTOffsetDigits + * @stable ICU 50 + */ + void setGMTOffsetDigits(const UnicodeString& digits, UErrorCode& status); + + /** + * Returns the localized GMT format string for GMT(UTC) itself (GMT offset is 0). + * @param gmtZeroFormat Receives the localized GMT string string for GMT(UTC) itself. + * @return A reference to the result GMT string. + * @see #setGMTZeroFormat + * @stable ICU 50 + */ + UnicodeString& getGMTZeroFormat(UnicodeString& gmtZeroFormat) const; + + /** + * Sets the localized GMT format string for GMT(UTC) itself (GMT offset is 0). + * @param gmtZeroFormat The localized GMT format string for GMT(UTC). + * @param status Receives the status. + * @see #getGMTZeroFormat + * @stable ICU 50 + */ + void setGMTZeroFormat(const UnicodeString& gmtZeroFormat, UErrorCode& status); + + /** + * Returns the bitwise flags of UTimeZoneFormatParseOption representing the default parse + * options used by this object. + * @return the default parse options. + * @see ParseOption + * @stable ICU 50 + */ + uint32_t getDefaultParseOptions(void) const; + + /** + * Sets the default parse options. + * <p><b>Note</b>: By default, an instance of <code>TimeZoneFormat</code> + * created by {@link #createInstance} has no parse options set (UTZFMT_PARSE_OPTION_NONE). + * To specify multiple options, use bitwise flags of UTimeZoneFormatParseOption. + * @see #UTimeZoneFormatParseOption + * @stable ICU 50 + */ + void setDefaultParseOptions(uint32_t flags); + + /** + * Returns the ISO 8601 basic time zone string for the given offset. + * For example, "-08", "-0830" and "Z" + * + * @param offset the offset from GMT(UTC) in milliseconds. + * @param useUtcIndicator true if ISO 8601 UTC indicator "Z" is used when the offset is 0. + * @param isShort true if shortest form is used. + * @param ignoreSeconds true if non-zero offset seconds is appended. + * @param result Receives the ISO format string. + * @param status Receives the status + * @return the ISO 8601 basic format. + * @see #formatOffsetISO8601Extended + * @see #parseOffsetISO8601 + * @stable ICU 51 + */ + UnicodeString& formatOffsetISO8601Basic(int32_t offset, UBool useUtcIndicator, UBool isShort, UBool ignoreSeconds, + UnicodeString& result, UErrorCode& status) const; + + /** + * Returns the ISO 8601 extended time zone string for the given offset. + * For example, "-08:00", "-08:30" and "Z" + * + * @param offset the offset from GMT(UTC) in milliseconds. + * @param useUtcIndicator true if ISO 8601 UTC indicator "Z" is used when the offset is 0. + * @param isShort true if shortest form is used. + * @param ignoreSeconds true if non-zero offset seconds is appended. + * @param result Receives the ISO format string. + * @param status Receives the status + * @return the ISO 8601 basic format. + * @see #formatOffsetISO8601Extended + * @see #parseOffsetISO8601 + * @stable ICU 51 + */ + UnicodeString& formatOffsetISO8601Extended(int32_t offset, UBool useUtcIndicator, UBool isShort, UBool ignoreSeconds, + UnicodeString& result, UErrorCode& status) const; + + /** + * Returns the localized GMT(UTC) offset format for the given offset. + * The localized GMT offset is defined by; + * <ul> + * <li>GMT format pattern (e.g. "GMT {0}" - see {@link #getGMTPattern}) + * <li>Offset time pattern (e.g. "+HH:mm" - see {@link #getGMTOffsetPattern}) + * <li>Offset digits (e.g. "0123456789" - see {@link #getGMTOffsetDigits}) + * <li>GMT zero format (e.g. "GMT" - see {@link #getGMTZeroFormat}) + * </ul> + * This format always uses 2 digit hours and minutes. When the given offset has non-zero + * seconds, 2 digit seconds field will be appended. For example, + * GMT+05:00 and GMT+05:28:06. + * @param offset the offset from GMT(UTC) in milliseconds. + * @param status Receives the status + * @param result Receives the localized GMT format string. + * @return A reference to the result. + * @see #parseOffsetLocalizedGMT + * @stable ICU 50 + */ + UnicodeString& formatOffsetLocalizedGMT(int32_t offset, UnicodeString& result, UErrorCode& status) const; + + /** + * Returns the short localized GMT(UTC) offset format for the given offset. + * The short localized GMT offset is defined by; + * <ul> + * <li>GMT format pattern (e.g. "GMT {0}" - see {@link #getGMTPattern}) + * <li>Offset time pattern (e.g. "+HH:mm" - see {@link #getGMTOffsetPattern}) + * <li>Offset digits (e.g. "0123456789" - see {@link #getGMTOffsetDigits}) + * <li>GMT zero format (e.g. "GMT" - see {@link #getGMTZeroFormat}) + * </ul> + * This format uses the shortest representation of offset. The hours field does not + * have leading zero and lower fields with zero will be truncated. For example, + * GMT+5 and GMT+530. + * @param offset the offset from GMT(UTC) in milliseconds. + * @param status Receives the status + * @param result Receives the short localized GMT format string. + * @return A reference to the result. + * @see #parseOffsetShortLocalizedGMT + * @stable ICU 51 + */ + UnicodeString& formatOffsetShortLocalizedGMT(int32_t offset, UnicodeString& result, UErrorCode& status) const; + + using Format::format; + + /** + * Returns the display name of the time zone at the given date for the style. + * @param style The style (e.g. <code>UTZFMT_STYLE_GENERIC_LONG</code>, <code>UTZFMT_STYLE_LOCALIZED_GMT</code>...) + * @param tz The time zone. + * @param date The date. + * @param name Receives the display name. + * @param timeType the output argument for receiving the time type (standard/daylight/unknown) + * used for the display name, or nullptr if the information is not necessary. + * @return A reference to the result + * @see #UTimeZoneFormatStyle + * @see #UTimeZoneFormatTimeType + * @stable ICU 50 + */ + virtual UnicodeString& format(UTimeZoneFormatStyle style, const TimeZone& tz, UDate date, + UnicodeString& name, UTimeZoneFormatTimeType* timeType = nullptr) const; + + /** + * Returns offset from GMT(UTC) in milliseconds for the given ISO 8601 + * style time zone string. When the given string is not an ISO 8601 time zone + * string, this method sets the current position as the error index + * to <code>ParsePosition pos</code> and returns 0. + * @param text The text contains ISO8601 style time zone string (e.g. "-08:00", "Z") + * at the position. + * @param pos The ParsePosition object. + * @return The offset from GMT(UTC) in milliseconds for the given ISO 8601 style + * time zone string. + * @see #formatOffsetISO8601Basic + * @see #formatOffsetISO8601Extended + * @stable ICU 50 + */ + int32_t parseOffsetISO8601(const UnicodeString& text, ParsePosition& pos) const; + + /** + * Returns offset from GMT(UTC) in milliseconds for the given localized GMT + * offset format string. When the given string cannot be parsed, this method + * sets the current position as the error index to <code>ParsePosition pos</code> + * and returns 0. + * @param text The text contains a localized GMT offset string at the position. + * @param pos The ParsePosition object. + * @return The offset from GMT(UTC) in milliseconds for the given localized GMT + * offset format string. + * @see #formatOffsetLocalizedGMT + * @stable ICU 50 + */ + int32_t parseOffsetLocalizedGMT(const UnicodeString& text, ParsePosition& pos) const; + + /** + * Returns offset from GMT(UTC) in milliseconds for the given short localized GMT + * offset format string. When the given string cannot be parsed, this method + * sets the current position as the error index to <code>ParsePosition pos</code> + * and returns 0. + * @param text The text contains a short localized GMT offset string at the position. + * @param pos The ParsePosition object. + * @return The offset from GMT(UTC) in milliseconds for the given short localized GMT + * offset format string. + * @see #formatOffsetShortLocalizedGMT + * @stable ICU 51 + */ + int32_t parseOffsetShortLocalizedGMT(const UnicodeString& text, ParsePosition& pos) const; + + /** + * Returns a <code>TimeZone</code> by parsing the time zone string according to + * the given parse position, the specified format style and parse options. + * + * @param text The text contains a time zone string at the position. + * @param style The format style + * @param pos The position. + * @param parseOptions The parse options represented by bitwise flags of UTimeZoneFormatParseOption. + * @param timeType The output argument for receiving the time type (standard/daylight/unknown), + * or nullptr if the information is not necessary. + * @return A <code>TimeZone</code>, or null if the input could not be parsed. + * @see UTimeZoneFormatStyle + * @see UTimeZoneFormatParseOption + * @see UTimeZoneFormatTimeType + * @stable ICU 50 + */ + virtual TimeZone* parse(UTimeZoneFormatStyle style, const UnicodeString& text, ParsePosition& pos, + int32_t parseOptions, UTimeZoneFormatTimeType* timeType = nullptr) const; + + /** + * Returns a <code>TimeZone</code> by parsing the time zone string according to + * the given parse position, the specified format style and the default parse options. + * + * @param text The text contains a time zone string at the position. + * @param style The format style + * @param pos The position. + * @param timeType The output argument for receiving the time type (standard/daylight/unknown), + * or nullptr if the information is not necessary. + * @return A <code>TimeZone</code>, or null if the input could not be parsed. + * @see UTimeZoneFormatStyle + * @see UTimeZoneFormatParseOption + * @see UTimeZoneFormatTimeType + * @stable ICU 50 + */ + TimeZone* parse(UTimeZoneFormatStyle style, const UnicodeString& text, ParsePosition& pos, + UTimeZoneFormatTimeType* timeType = nullptr) const; + + /* ---------------------------------------------- + * Format APIs + * ---------------------------------------------- */ + + /** + * Format an object to produce a time zone display string using localized GMT offset format. + * This method handles Formattable objects with a <code>TimeZone</code>. If a the Formattable + * object type is not a <code>TimeZone</code>, then it returns a failing UErrorCode. + * @param obj The object to format. Must be a <code>TimeZone</code>. + * @param appendTo Output parameter to receive result. Result is appended to existing contents. + * @param pos On input: an alignment field, if desired. On output: the offsets of the alignment field. + * @param status Output param filled with success/failure status. + * @return Reference to 'appendTo' parameter. + * @stable ICU 50 + */ + virtual UnicodeString& format(const Formattable& obj, UnicodeString& appendTo, + FieldPosition& pos, UErrorCode& status) const override; + + /** + * Parse a string to produce an object. This methods handles parsing of + * time zone display strings into Formattable objects with <code>TimeZone</code>. + * @param source The string to be parsed into an object. + * @param result Formattable to be set to the parse result. If parse fails, return contents are undefined. + * @param parse_pos The position to start parsing at. Upon return this param is set to the position after the + * last character successfully parsed. If the source is not parsed successfully, this param + * will remain unchanged. + * @return A newly created Formattable* object, or nullptr on failure. The caller owns this and should + * delete it when done. + * @stable ICU 50 + */ + virtual void parseObject(const UnicodeString& source, Formattable& result, ParsePosition& parse_pos) const override; + + /** + * ICU "poor man's RTTI", returns a UClassID for this class. + * @stable ICU 50 + */ + static UClassID U_EXPORT2 getStaticClassID(void); + + /** + * ICU "poor man's RTTI", returns a UClassID for the actual class. + * @stable ICU 50 + */ + virtual UClassID getDynamicClassID() const override; + +protected: + /** + * Constructs a TimeZoneFormat object for the specified locale. + * @param locale the locale + * @param status receives the status. + * @stable ICU 50 + */ + 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; + + /** + * Returns the time zone's specific format string. + * @param tz the time zone + * @param stdType the name type used for standard time + * @param dstType the name type used for daylight time + * @param date the date + * @param name receives the time zone's specific format name string + * @param timeType when null, actual time type is set + * @return a reference to name. + */ + UnicodeString& formatSpecific(const TimeZone& tz, UTimeZoneNameType stdType, UTimeZoneNameType dstType, + UDate date, UnicodeString& name, UTimeZoneFormatTimeType *timeType) const; + + /** + * Returns the time zone's generic format string. + * @param tz the time zone + * @param genType the generic name type + * @param date the date + * @param name receives the time zone's generic format name string + * @return a reference to name. + */ + UnicodeString& formatGeneric(const TimeZone& tz, int32_t genType, UDate date, UnicodeString& name) const; + + /** + * Lazily create a TimeZoneGenericNames instance + * @param status receives the status + * @return the cached TimeZoneGenericNames. + */ + const TimeZoneGenericNames* getTimeZoneGenericNames(UErrorCode& status) const; + + /** + * Lazily create a TZDBTimeZoneNames instance + * @param status receives the status + * @return the cached TZDBTimeZoneNames. + */ + const TZDBTimeZoneNames* getTZDBTimeZoneNames(UErrorCode& status) const; + + /** + * Private method returning the time zone's exemplar location string. + * This method will never return empty. + * @param tz the time zone + * @param name receives the time zone's exemplar location name + * @return a reference to name. + */ + UnicodeString& formatExemplarLocation(const TimeZone& tz, UnicodeString& name) const; + + /** + * Private enum specifying a combination of offset fields + */ + enum OffsetFields { + FIELDS_H, + FIELDS_HM, + FIELDS_HMS + }; + + /** + * Parses the localized GMT pattern string and initialize + * localized gmt pattern fields. + * @param gmtPattern the localized GMT pattern string such as "GMT {0}" + * @param status U_ILLEGAL_ARGUMENT_ERROR is set when the specified pattern does not + * contain an argument "{0}". + */ + void initGMTPattern(const UnicodeString& gmtPattern, UErrorCode& status); + + /** + * Parse the GMT offset pattern into runtime optimized format. + * @param pattern the offset pattern string + * @param required the required set of fields, such as FIELDS_HM + * @param status U_ILLEGAL_ARGUMENT is set when the specified pattern does not contain + * pattern letters for the required fields. + * @return A list of GMTOffsetField objects, or nullptr on error. + */ + static UVector* parseOffsetPattern(const UnicodeString& pattern, OffsetFields required, UErrorCode& status); + + /** + * Appends seconds field to the offset pattern with hour/minute + * Note: This code will be obsoleted once we add hour-minute-second pattern data in CLDR. + * @param offsetHM the offset pattern including hours and minutes fields + * @param result the output offset pattern including hour, minute and seconds fields + * @param status receives the status + * @return a reference to result + */ + static UnicodeString& expandOffsetPattern(const UnicodeString& offsetHM, UnicodeString& result, UErrorCode& status); + + /** + * Truncates minutes field to the offset pattern with hour/minute + * Note: This code will be obsoleted once we add hour pattern data in CLDR. + * @param offsetHM the offset pattern including hours and minutes fields + * @param result the output offset pattern including only hours field + * @param status receives the status + * @return a reference to result + */ + static UnicodeString& truncateOffsetPattern(const UnicodeString& offsetHM, UnicodeString& result, UErrorCode& status); + + /** + * Break input string into UChar32[]. Each array element represents + * a code point. This method is used for parsing localized digit + * characters and support characters in Unicode supplemental planes. + * @param str the string + * @param codeArray receives the result + * @param capacity the capacity of codeArray + * @return true when the specified code array is fully filled with code points + * (no under/overflow). + */ + static UBool toCodePoints(const UnicodeString& str, UChar32* codeArray, int32_t capacity); + + /** + * Private method supprting all of ISO8601 formats + * @param offset the offset from GMT(UTC) in milliseconds. + * @param useUtcIndicator true if ISO 8601 UTC indicator "Z" is used when the offset is 0. + * @param isShort true if shortest form is used. + * @param ignoreSeconds true if non-zero offset seconds is appended. + * @param result Receives the result + * @param status Receives the status + * @return the ISO 8601 basic format. + */ + UnicodeString& formatOffsetISO8601(int32_t offset, UBool isBasic, UBool useUtcIndicator, + UBool isShort, UBool ignoreSeconds, UnicodeString& result, UErrorCode& status) const; + + /** + * Private method used for localized GMT formatting. + * @param offset the zone's UTC offset + * @param isShort true if the short localized GMT format is desired. + * @param result receives the localized GMT format string + * @param status receives the status + */ + UnicodeString& formatOffsetLocalizedGMT(int32_t offset, UBool isShort, UnicodeString& result, UErrorCode& status) const; + + /** + * Returns offset from GMT(UTC) in milliseconds for the given ISO 8601 style + * (extended format) time zone string. When the given string is not an ISO 8601 time + * zone string, this method sets the current position as the error index + * to <code>ParsePosition pos</code> and returns 0. + * @param text the text contains ISO 8601 style time zone string (e.g. "-08:00", "Z") + * at the position. + * @param pos the position, non-negative error index will be set on failure. + * @param extendedOnly true if parsing the text as ISO 8601 extended offset format (e.g. "-08:00"), + * or false to evaluate the text as basic format. + * @param hasDigitOffset receiving if the parsed zone string contains offset digits. + * @return the offset from GMT(UTC) in milliseconds for the given ISO 8601 style + * time zone string. + */ + int32_t parseOffsetISO8601(const UnicodeString& text, ParsePosition& pos, UBool extendedOnly, + UBool* hasDigitOffset = nullptr) const; + + /** + * Appends localized digits to the buffer. + * This code assumes that the input number is 0 - 59 + * @param buf the target buffer + * @param n the integer number + * @param minDigits the minimum digits width + */ + void appendOffsetDigits(UnicodeString& buf, int32_t n, uint8_t minDigits) const; + + /** + * Returns offset from GMT(UTC) in milliseconds for the given localized GMT + * offset format string. When the given string cannot be parsed, this method + * sets the current position as the error index to <code>ParsePosition pos</code> + * and returns 0. + * @param text the text contains a localized GMT offset string at the position. + * @param pos the position, non-negative error index will be set on failure. + * @param isShort true if this parser to try the short format first + * @param hasDigitOffset receiving if the parsed zone string contains offset digits. + * @return the offset from GMT(UTC) in milliseconds for the given localized GMT + * offset format string. + */ + int32_t parseOffsetLocalizedGMT(const UnicodeString& text, ParsePosition& pos, + UBool isShort, UBool* hasDigitOffset) const; + + /** + * Parse localized GMT format generated by the patter used by this formatter, except + * GMT Zero format. + * @param text the input text + * @param start the start index + * @param isShort true if the short localized format is parsed. + * @param parsedLen receives the parsed length + * @return the parsed offset in milliseconds + */ + int32_t parseOffsetLocalizedGMTPattern(const UnicodeString& text, int32_t start, + UBool isShort, int32_t& parsedLen) const; + + /** + * Parses localized GMT offset fields into offset. + * @param text the input text + * @param start the start index + * @param isShort true if this is a short format - currently not used + * @param parsedLen the parsed length, or 0 on failure. + * @return the parsed offset in milliseconds. + */ + int32_t parseOffsetFields(const UnicodeString& text, int32_t start, UBool isShort, int32_t& parsedLen) const; + + /** + * Parse localized GMT offset fields with the given pattern. + * @param text the input text + * @param start the start index + * @param pattenItems the pattern (already itemized) + * @param forceSingleHourDigit true if hours field is parsed as a single digit + * @param hour receives the hour offset field + * @param min receives the minute offset field + * @param sec receives the second offset field + * @return the parsed length + */ + int32_t parseOffsetFieldsWithPattern(const UnicodeString& text, int32_t start, + UVector* patternItems, UBool forceSingleHourDigit, int32_t& hour, int32_t& min, int32_t& sec) const; + + /** + * Parses abutting localized GMT offset fields (such as 0800) into offset. + * @param text the input text + * @param start the start index + * @param parsedLen the parsed length, or 0 on failure + * @return the parsed offset in milliseconds. + */ + int32_t parseAbuttingOffsetFields(const UnicodeString& text, int32_t start, int32_t& parsedLen) const; + + /** + * Parses the input text using the default format patterns (e.g. "UTC{0}"). + * @param text the input text + * @param start the start index + * @param parsedLen the parsed length, or 0 on failure + * @return the parsed offset in milliseconds. + */ + int32_t parseOffsetDefaultLocalizedGMT(const UnicodeString& text, int start, int32_t& parsedLen) const; + + /** + * Parses the input GMT offset fields with the default offset pattern. + * @param text the input text + * @param start the start index + * @param separator the separator character, e.g. ':' + * @param parsedLen the parsed length, or 0 on failure. + * @return the parsed offset in milliseconds. + */ + int32_t parseDefaultOffsetFields(const UnicodeString& text, int32_t start, char16_t separator, + int32_t& parsedLen) const; + + /** + * Reads an offset field value. This method will stop parsing when + * 1) number of digits reaches <code>maxDigits</code> + * 2) just before already parsed number exceeds <code>maxVal</code> + * + * @param text the text + * @param start the start offset + * @param minDigits the minimum number of required digits + * @param maxDigits the maximum number of digits + * @param minVal the minimum value + * @param maxVal the maximum value + * @param parsedLen the actual parsed length. + * @return the integer value parsed + */ + 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; + + /** + * Reads a single decimal digit, either localized digits used by this object + * or any Unicode numeric character. + * @param text the text + * @param start the start index + * @param len the actual length read from the text + * the start index is not a decimal number. + * @return the integer value of the parsed digit, or -1 on failure. + */ + int32_t parseSingleLocalizedDigit(const UnicodeString& text, int32_t start, int32_t& len) const; + + /** + * Formats offset using ASCII digits. The input offset range must be + * within +/-24 hours (exclusive). + * @param offset The offset + * @param sep The field separator character or 0 if not required + * @param minFields The minimum fields + * @param maxFields The maximum fields + * @return The offset string + */ + static UnicodeString& formatOffsetWithAsciiDigits(int32_t offset, char16_t sep, + OffsetFields minFields, OffsetFields maxFields, UnicodeString& result); + + /** + * Parses offset represented by contiguous ASCII digits. + * <p> + * Note: This method expects the input position is already at the start of + * ASCII digits and does not parse sign (+/-). + * @param text The text contains a sequence of ASCII digits + * @param pos The parse position + * @param minFields The minimum Fields to be parsed + * @param maxFields The maximum Fields to be parsed + * @param fixedHourWidth true if hours field must be width of 2 + * @return Parsed offset, 0 or positive number. + */ + static int32_t parseAbuttingAsciiOffsetFields(const UnicodeString& text, ParsePosition& pos, + OffsetFields minFields, OffsetFields maxFields, UBool fixedHourWidth); + + /** + * Parses offset represented by ASCII digits and separators. + * <p> + * Note: This method expects the input position is already at the start of + * ASCII digits and does not parse sign (+/-). + * @param text The text + * @param pos The parse position + * @param sep The separator character + * @param minFields The minimum Fields to be parsed + * @param maxFields The maximum Fields to be parsed + * @return Parsed offset, 0 or positive number. + */ + static int32_t parseAsciiOffsetFields(const UnicodeString& text, ParsePosition& pos, char16_t sep, + OffsetFields minFields, OffsetFields maxFields); + + /** + * Unquotes the message format style pattern. + * @param pattern the pattern + * @param result receive the unquoted pattern. + * @return A reference to result. + */ + static UnicodeString& unquote(const UnicodeString& pattern, UnicodeString& result); + + /** + * Initialize localized GMT format offset hour/min/sec patterns. + * This method parses patterns into optimized run-time format. + * @param status receives the status. + */ + void initGMTOffsetPatterns(UErrorCode& status); + + /** + * Check if there are any GMT format offset patterns without + * any separators between hours field and minutes field and update + * fAbuttingOffsetHoursAndMinutes field. This method must be called + * after all patterns are parsed into pattern items. + */ + void checkAbuttingHoursAndMinutes(); + + /** + * Creates an instance of TimeZone for the given offset + * @param offset the offset + * @return A TimeZone with the given offset + */ + TimeZone* createTimeZoneForOffset(int32_t offset) const; + + /** + * Returns the time type for the given name type + * @param nameType the name type + * @return the time type (unknown/standard/daylight) + */ + static UTimeZoneFormatTimeType getTimeType(UTimeZoneNameType nameType); + + /** + * Returns the time zone ID of a match at the specified index within + * the MatchInfoCollection. + * @param matches the collection of matches + * @param idx the index within matches + * @param tzID receives the resolved time zone ID + * @return a reference to tzID. + */ + UnicodeString& getTimeZoneID(const TimeZoneNames::MatchInfoCollection* matches, int32_t idx, UnicodeString& tzID) const; + + + /** + * Parse a zone ID. + * @param text the text contains a time zone ID string at the position. + * @param pos the position + * @param tzID receives the zone ID + * @return a reference to tzID + */ + UnicodeString& parseZoneID(const UnicodeString& text, ParsePosition& pos, UnicodeString& tzID) const; + + /** + * Parse a short zone ID. + * @param text the text contains a short time zone ID string at the position. + * @param pos the position + * @param tzID receives the short zone ID + * @return a reference to tzID + */ + UnicodeString& parseShortZoneID(const UnicodeString& text, ParsePosition& pos, UnicodeString& tzID) const; + + /** + * Parse an exemplar location string. + * @param text the text contains an exemplar location string at the position. + * @param pos the position. + * @param tzID receives the time zone ID + * @return a reference to tzID + */ + UnicodeString& parseExemplarLocation(const UnicodeString& text, ParsePosition& pos, UnicodeString& tzID) const; +}; + +U_NAMESPACE_END + +#endif /* !UCONFIG_NO_FORMATTING */ + +#endif /* U_SHOW_CPLUSPLUS_API */ + +#endif |