/** * \file * \brief C++ API: Symbols for formatting numbers.
*/
U_NAMESPACE_BEGIN
/** * This class represents the set of symbols needed by DecimalFormat * to format numbers. DecimalFormat creates for itself an instance of * DecimalFormatSymbols from its locale data. If you need to change any * of these symbols, you can get the DecimalFormatSymbols object from * your DecimalFormat and modify it. * <P> * Here are the special characters used in the parts of the * subpattern, with notes on their usage. * <pre> * \code * Symbol Meaning * 0 a digit * # a digit, zero shows as absent * . placeholder for decimal separator * , placeholder for grouping separator. * ; separates formats. * - default negative prefix. * % divide by 100 and show as percentage * X any other characters can be used in the prefix or suffix * ' used to quote special characters in a prefix or suffix. * \endcode * </pre> * [Notes] * <P> * If there is no explicit negative subpattern, - is prefixed to the * positive form. That is, "0.00" alone is equivalent to "0.00;-0.00". * <P> * The grouping separator is commonly used for thousands, but in some * countries for ten-thousands. The interval is a constant number of * digits between the grouping characters, such as 100,000,000 or 1,0000,0000. * If you supply a pattern with multiple grouping characters, the interval * between the last one and the end of the integer is the one that is * used. So "#,##,###,####" == "######,####" == "##,####,####".
*/ class U_I18N_API DecimalFormatSymbols : public UObject { public: /** * Constants for specifying a number format symbol. * @stable ICU 2.0
*/ enum ENumberFormatSymbol { /** The decimal separator */
kDecimalSeparatorSymbol, /** The grouping separator */
kGroupingSeparatorSymbol, /** The pattern separator */
kPatternSeparatorSymbol, /** The percent sign */
kPercentSymbol, /** Zero*/
kZeroDigitSymbol, /** Character representing a digit in the pattern */
kDigitSymbol, /** The minus sign */
kMinusSignSymbol, /** The plus sign */
kPlusSignSymbol, /** The currency symbol */
kCurrencySymbol, /** The international currency symbol */
kIntlCurrencySymbol, /** The monetary separator */
kMonetarySeparatorSymbol, /** The exponential symbol */
kExponentialSymbol, /** Per mill symbol - replaces kPermillSymbol */
kPerMillSymbol, /** Escape padding character */
kPadEscapeSymbol, /** Infinity symbol */
kInfinitySymbol, /** Nan symbol */
kNaNSymbol, /** Significant digit symbol
* @stable ICU 3.0 */
kSignificantDigitSymbol, /** The monetary grouping separator * @stable ICU 3.6
*/
kMonetaryGroupingSeparatorSymbol, /** One * @stable ICU 4.6
*/
kOneDigitSymbol, /** Two * @stable ICU 4.6
*/
kTwoDigitSymbol, /** Three * @stable ICU 4.6
*/
kThreeDigitSymbol, /** Four * @stable ICU 4.6
*/
kFourDigitSymbol, /** Five * @stable ICU 4.6
*/
kFiveDigitSymbol, /** Six * @stable ICU 4.6
*/
kSixDigitSymbol, /** Seven * @stable ICU 4.6
*/
kSevenDigitSymbol, /** Eight * @stable ICU 4.6
*/
kEightDigitSymbol, /** Nine * @stable ICU 4.6
*/
kNineDigitSymbol, /** Multiplication sign. * @stable ICU 54
*/
kExponentMultiplicationSymbol, #ifndef U_HIDE_INTERNAL_API /** Approximately sign. * @internal
*/
kApproximatelySignSymbol, #endif/* U_HIDE_INTERNAL_API */ /** count symbol constants */
kFormatSymbolCount = kExponentMultiplicationSymbol + 2
};
/** * Create a DecimalFormatSymbols object for the given locale. * * @param locale The locale to get symbols for. * @param status Input/output parameter, set to success or * failure code upon return. * @stable ICU 2.0
*/
DecimalFormatSymbols(const Locale& locale, UErrorCode& status);
/** * Creates a DecimalFormatSymbols instance for the given locale with digits and symbols * corresponding to the given NumberingSystem. * * This constructor behaves equivalently to the normal constructor called with a locale having a * "numbers=xxxx" keyword specifying the numbering system by name. * * In this constructor, the NumberingSystem argument will be used even if the locale has its own * "numbers=xxxx" keyword. * * @param locale The locale to get symbols for. * @param ns The numbering system. * @param status Input/output parameter, set to success or * failure code upon return. * @stable ICU 60
*/
DecimalFormatSymbols(const Locale& locale, const NumberingSystem& ns, UErrorCode& status);
/** * Create a DecimalFormatSymbols object for the default locale. * This constructor will not fail. If the resource file data is * not available, it will use hard-coded last-resort data and * set status to U_USING_FALLBACK_ERROR. * * @param status Input/output parameter, set to success or * failure code upon return. * @stable ICU 2.0
*/
DecimalFormatSymbols(UErrorCode& status);
/** * Creates a DecimalFormatSymbols object with last-resort data. * Intended for callers who cache the symbols data and * set all symbols on the resulting object. * * The last-resort symbols are similar to those for the root data, * except that the grouping separators are empty, * the NaN symbol is U+FFFD rather than "NaN", * and the CurrencySpacing patterns are empty. * * @param status Input/output parameter, set to success or * failure code upon return. * @return last-resort symbols * @stable ICU 52
*/ static DecimalFormatSymbols* createWithLastResortData(UErrorCode& status);
/** * Return true if another object is semantically equal to this one. * * @param other the object to be compared with. * @return true if another object is semantically equal to this one. * @stable ICU 2.0
*/ booloperator==(const DecimalFormatSymbols& other) const;
/** * Return true if another object is semantically unequal to this one. * * @param other the object to be compared with. * @return true if another object is semantically unequal to this one. * @stable ICU 2.0
*/ booloperator!=(const DecimalFormatSymbols& other) const { return !operator==(other); }
/** * Get one of the format symbols by its enum constant. * Each symbol is stored as a string so that graphemes * (characters with modifier letters) can be used. * * @param symbol Constant to indicate a number format symbol. * @return the format symbols by the param 'symbol' * @stable ICU 2.0
*/ inline UnicodeString getSymbol(ENumberFormatSymbol symbol) const;
/** * Set one of the format symbols by its enum constant. * Each symbol is stored as a string so that graphemes * (characters with modifier letters) can be used. * * @param symbol Constant to indicate a number format symbol. * @param value value of the format symbol * @param propagateDigits If false, setting the zero digit will not automatically set 1-9. * The default behavior is to automatically set 1-9 if zero is being set and the value * it is being set to corresponds to a known Unicode zero digit. * @stable ICU 2.0
*/ void setSymbol(ENumberFormatSymbol symbol, const UnicodeString &value, const UBool propagateDigits);
#ifndef U_HIDE_INTERNAL_API /** * Loads symbols for the specified currency into this instance. * * This method is internal. If you think it should be public, file a ticket. * * @internal
*/ void setCurrency(const char16_t* currency, UErrorCode& status); #endif// U_HIDE_INTERNAL_API
/** * Returns the locale for which this object was constructed. * @stable ICU 2.6
*/ inline Locale getLocale() const;
/** * Returns the locale for this object. Two flavors are available: * valid and actual locale. * @stable ICU 2.8
*/
Locale getLocale(ULocDataLocaleType type, UErrorCode& status) const;
/** * Get pattern string for 'CurrencySpacing' that can be applied to * currency format. * This API gets the CurrencySpacing data from ResourceBundle. The pattern can * be empty if there is no data from current locale and its parent locales. * * @param type : UNUM_CURRENCY_MATCH, UNUM_CURRENCY_SURROUNDING_MATCH or UNUM_CURRENCY_INSERT. * @param beforeCurrency : true if the pattern is for before currency symbol. * false if the pattern is for after currency symbol. * @param status: Input/output parameter, set to success or * failure code upon return. * @return pattern string for currencyMatch, surroundingMatch or spaceInsert. * Return empty string if there is no data for this locale and its parent * locales. * @stable ICU 4.8
*/ const UnicodeString& getPatternForCurrencySpacing(UCurrencySpacing type,
UBool beforeCurrency,
UErrorCode& status) const; /** * Set pattern string for 'CurrencySpacing' that can be applied to * currency format. * * @param type : UNUM_CURRENCY_MATCH, UNUM_CURRENCY_SURROUNDING_MATCH or UNUM_CURRENCY_INSERT. * @param beforeCurrency : true if the pattern is for before currency symbol. * false if the pattern is for after currency symbol. * @param pattern : pattern string to override current setting. * @stable ICU 4.8
*/ void setPatternForCurrencySpacing(UCurrencySpacing type,
UBool beforeCurrency, const UnicodeString& pattern);
/** * ICU "poor man's RTTI", returns a UClassID for the actual class. * * @stable ICU 2.2
*/ virtual UClassID getDynamicClassID() const override;
/** * ICU "poor man's RTTI", returns a UClassID for this class. * * @stable ICU 2.2
*/ static UClassID U_EXPORT2 getStaticClassID();
private:
DecimalFormatSymbols();
/** * Initializes the symbols from the LocaleElements resource bundle. * Note: The organization of LocaleElements badly needs to be * cleaned up. * * @param locale The locale to get symbols for. * @param success Input/output parameter, set to success or * failure code upon return. * @param useLastResortData determine if use last resort data * @param ns The NumberingSystem to use; otherwise, fall * back to the locale.
*/ void initialize(const Locale& locale, UErrorCode& success,
UBool useLastResortData = false, const NumberingSystem* ns = nullptr);
/** * Initialize the symbols with default values.
*/ void initialize();
public:
#ifndef U_HIDE_INTERNAL_API /** * @internal For ICU use only
*/ inline UBool isCustomCurrencySymbol() const { return fIsCustomCurrencySymbol;
}
/** * @internal For ICU use only
*/ inline UBool isCustomIntlCurrencySymbol() const { return fIsCustomIntlCurrencySymbol;
}
/** * @internal For ICU use only
*/ inline UChar32 getCodePointZero() const { return fCodePointZero;
} #endif/* U_HIDE_INTERNAL_API */
/** * _Internal_ function - more efficient version of getSymbol, * returning a const reference to one of the symbol strings. * The returned reference becomes invalid when the symbol is changed * or when the DecimalFormatSymbols are destroyed. * Note: moved \#ifndef U_HIDE_INTERNAL_API after this, since this is needed for inline in DecimalFormat * * This is not currently stable API, but if you think it should be stable, * post a comment on the following ticket and the ICU team will take a look: * https://unicode-org.atlassian.net/browse/ICU-13580 * * @param symbol Constant to indicate a number format symbol. * @return the format symbol by the param 'symbol' * @internal
*/ inlineconst UnicodeString& getConstSymbol(ENumberFormatSymbol symbol) const;
#ifndef U_HIDE_INTERNAL_API /** * Returns the const UnicodeString reference, like getConstSymbol, * corresponding to the digit with the given value. This is equivalent * to accessing the symbol from getConstSymbol with the corresponding * key, such as kZeroDigitSymbol or kOneDigitSymbol. * * This is not currently stable API, but if you think it should be stable, * post a comment on the following ticket and the ICU team will take a look: * https://unicode-org.atlassian.net/browse/ICU-13580 * * @param digit The digit, an integer between 0 and 9 inclusive. * If outside the range 0 to 9, the zero digit is returned. * @return the format symbol for the given digit. * @internal This API is currently for ICU use only.
*/ inlineconst UnicodeString& getConstDigitSymbol(int32_t digit) const;
/** * Returns that pattern stored in currency info. Internal API for use by NumberFormat API. * @internal
*/ inlineconst char16_t* getCurrencyPattern() const;
/** * Returns the numbering system with which this DecimalFormatSymbols was initialized. * @internal
*/ inlineconstchar* getNumberingSystemName() const; #endif/* U_HIDE_INTERNAL_API */
private: /** * Private symbol strings. * They are either loaded from a resource bundle or otherwise owned. * setSymbol() clones the symbol string. * Readonly aliases can only come from a resource bundle, so that we can always * use fastCopyFrom() with them. * * If DecimalFormatSymbols becomes subclassable and the status of fSymbols changes * from private to protected, * or when fSymbols can be set any other way that allows them to be readonly aliases * to non-resource bundle strings, * then regular UnicodeString copies must be used instead of fastCopyFrom(). *
*/
UnicodeString fSymbols[kFormatSymbolCount];
/** * Dealing with code points is faster than dealing with strings when formatting. Because of * this, we maintain a value containing the zero code point that is used whenever digitStrings * represents a sequence of ten code points in order. * * <p>If the value stored here is positive, it means that the code point stored in this value * corresponds to the digitStrings array, and codePointZero can be used instead of the * digitStrings array for the purposes of efficient formatting; if -1, then digitStrings does * *not* contain a sequence of code points, and it must be used directly. * * <p>It is assumed that codePointZero always shadows the value in digitStrings. codePointZero * should never be set directly; rather, it should be updated only when digitStrings mutates. * That is, the flow of information is digitStrings -> codePointZero, not the other way.
*/
UChar32 fCodePointZero;
// If the zero digit is being set to a known zero digit according to Unicode, // then we automatically set the corresponding 1-9 digits // Also record updates to fCodePointZero. Be conservative if in doubt. if (symbol == kZeroDigitSymbol) {
UChar32 sym = value.char32At(0); if ( propagateDigits && u_charDigitValue(sym) == 0 && value.countChar32() == 1 ) {
fCodePointZero = sym; for ( int8_t i = 1 ; i<= 9 ; i++ ) {
sym++;
fSymbols[static_cast<int>(kOneDigitSymbol) + i - 1] = UnicodeString(sym);
}
} else {
fCodePointZero = -1;
}
} elseif (symbol >= kOneDigitSymbol && symbol <= kNineDigitSymbol) {
fCodePointZero = -1;
}
}
Die Informationen auf dieser Webseite wurden
nach bestem Wissen sorgfältig zusammengestellt. Es wird jedoch weder Vollständigkeit, noch Richtigkeit,
noch Qualität der bereit gestellten Informationen zugesichert.
Bemerkung:
Die farbliche Syntaxdarstellung und die Messung sind noch experimentell.