* NumberFormat helps you to format and parse numbers for any locale. * Your code can be completely independent of the locale conventions * for decimal points, thousands-separators, or even the particular * decimal digits used, or whether the number format is even decimal. *
* To format a number for the current Locale, use one of the static * factory methods: *
* \code * double myNumber = 7.0; * UnicodeString myString; * UErrorCode success = U_ZERO_ERROR; * NumberFormat* nf = NumberFormat::createInstance(success) * nf->format(myNumber, myString); * cout << " Example 1: " << myString << endl; * \endcode ** Note that there are additional factory methods within subclasses of * NumberFormat. *
* If you are formatting multiple numbers, it is more efficient to get * the format and use it multiple times so that the system doesn't * have to fetch the information about the local language and country * conventions multiple times. *
* \code
* UnicodeString myString;
* UErrorCode success = U_ZERO_ERROR;
* nf = NumberFormat::createInstance( success );
* int32_t a[] = { 123, 3333, -1234567 };
* const int32_t a_len = sizeof(a) / sizeof(a[0]);
* myString.remove();
* for (int32_t i = 0; i < a_len; i++) {
* nf->format(a[i], myString);
* myString += " ; ";
* }
* cout << " Example 2: " << myString << endl;
* \endcode
*
* To format a number for a different Locale, specify it in the
* call to createInstance().
* * \code * nf = NumberFormat::createInstance( Locale::FRENCH, success ); * \endcode ** You can use a NumberFormat to parse also. *
* \code * UErrorCode success; * Formattable result(-999); // initialized with error code * nf->parse(myString, result, success); * \endcode ** Use createInstance to get the normal number format for that country. * There are other static factory methods available. Use getCurrency * to get the currency number format for that country. Use getPercent * to get a format for displaying percentages. With this format, a * fraction from 0.53 is displayed as 53%. *
* Starting from ICU 4.2, you can use createInstance() by passing in a 'style' * as parameter to get the correct instance. * For example, * use createInstance(...kNumberStyle...) to get the normal number format, * createInstance(...kPercentStyle...) to get a format for displaying * percentage, * createInstance(...kScientificStyle...) to get a format for displaying * scientific number, * createInstance(...kCurrencyStyle...) to get the currency number format, * in which the currency is represented by its symbol, for example, "$3.00". * createInstance(...kIsoCurrencyStyle...) to get the currency number format, * in which the currency is represented by its ISO code, for example "USD3.00". * createInstance(...kPluralCurrencyStyle...) to get the currency number format, * in which the currency is represented by its full name in plural format, * for example, "3.00 US dollars" or "1.00 US dollar". *
* You can also control the display of numbers with such methods as * getMinimumFractionDigits. If you want even more control over the * format or parsing, or want to give your users more control, you can * try casting the NumberFormat you get from the factory methods to a * DecimalNumberFormat. This will work for the vast majority of * countries; just remember to put it in a try block in case you * encounter an unusual one. *
* You can also use forms of the parse and format methods with * ParsePosition and FieldPosition to allow you to: *
* If you are using a monospaced font with spacing for alignment, you * can pass the FieldPosition in your format call, with field = * INTEGER_FIELD. On output, getEndIndex will be set to the offset * between the last character of the integer and the decimal. Add * (desiredSpaceCount - getEndIndex) spaces at the front of the * string. *
* If you are using proportional fonts, instead of padding with * spaces, measure the width of the string in pixels from the start to * getEndIndex. Then move the pen by (desiredPixelWidth - * widthToAlignmentPoint) before drawing the text. It also works * where there is no decimal, but possibly additional characters at * the end, e.g. with parentheses in negative numbers: "(12)" for -12. *
* User subclasses are not supported. While clients may write * subclasses, such code will not necessarily work and will not be * guaranteed to work stably from release to release. * * @stable ICU 2.0 */ class U_I18N_API NumberFormat : public Format { public: /** * Alignment Field constants used to construct a FieldPosition object. * Signifies that the position of the integer part or fraction part of * a formatted number should be returned. * * Note: as of ICU 4.4, the values in this enum have been extended to * support identification of all number format fields, not just those * pertaining to alignment. * * These constants are provided for backwards compatibility only. * Please use the C style constants defined in the header file unum.h. * * @see FieldPosition * @stable ICU 2.0 */ enum EAlignmentFields { /** @stable ICU 2.0 */ kIntegerField = UNUM_INTEGER_FIELD, /** @stable ICU 2.0 */ kFractionField = UNUM_FRACTION_FIELD, /** @stable ICU 2.0 */ kDecimalSeparatorField = UNUM_DECIMAL_SEPARATOR_FIELD, /** @stable ICU 2.0 */ kExponentSymbolField = UNUM_EXPONENT_SYMBOL_FIELD, /** @stable ICU 2.0 */ kExponentSignField = UNUM_EXPONENT_SIGN_FIELD, /** @stable ICU 2.0 */ kExponentField = UNUM_EXPONENT_FIELD, /** @stable ICU 2.0 */ kGroupingSeparatorField = UNUM_GROUPING_SEPARATOR_FIELD, /** @stable ICU 2.0 */ kCurrencyField = UNUM_CURRENCY_FIELD, /** @stable ICU 2.0 */ kPercentField = UNUM_PERCENT_FIELD, /** @stable ICU 2.0 */ kPermillField = UNUM_PERMILL_FIELD, /** @stable ICU 2.0 */ kSignField = UNUM_SIGN_FIELD, /** * These constants are provided for backwards compatibility only. * Please use the constants defined in the header file unum.h. */ /** @stable ICU 2.0 */ INTEGER_FIELD = UNUM_INTEGER_FIELD, /** @stable ICU 2.0 */ FRACTION_FIELD = UNUM_FRACTION_FIELD }; /** * Destructor. * @stable ICU 2.0 */ virtual ~NumberFormat(); /** * Return true if the given Format objects are semantically equal. * Objects of different subclasses are considered unequal. * @return true if the given Format objects are semantically equal. * @stable ICU 2.0 */ virtual UBool operator==(const Format& other) const; using Format::format; /** * Format an object to produce a string. This method handles * Formattable objects with numeric types. If the Formattable * object type is not a numeric type, then it returns a failing * UErrorCode. * * @param obj The object to format. * @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 2.0 */ virtual UnicodeString& format(const Formattable& obj, UnicodeString& appendTo, FieldPosition& pos, UErrorCode& status) const; /** * Format an object to produce a string. This method handles * Formattable objects with numeric types. If the Formattable * object type is not a numeric type, then it returns a failing * UErrorCode. * * @param obj The object to format. * @param appendTo Output parameter to receive result. * Result is appended to existing contents. * @param posIter On return, can be used to iterate over positions * of fields generated by this format call. Can be * NULL. * @param status Output param filled with success/failure status. * @return Reference to 'appendTo' parameter. * @stable 4.4 */ virtual UnicodeString& format(const Formattable& obj, UnicodeString& appendTo, FieldPositionIterator* posIter, UErrorCode& status) const; /** * Parse a string to produce an object. This methods handles * parsing of numeric strings into Formattable objects with numeric * types. *
* Before calling, set parse_pos.index to the offset you want to * start parsing at in the source. After calling, parse_pos.index * indicates the position after the successfully parsed text. If * an error occurs, parse_pos.index is unchanged. *
* When parsing, leading whitespace is discarded (with successful * parse), while trailing whitespace is left as is. *
* See Format::parseObject() for more. * * @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 NULL * on failure. The caller owns this and should * delete it when done. * @stable ICU 2.0 */ virtual void parseObject(const UnicodeString& source, Formattable& result, ParsePosition& parse_pos) const; /** * Format a double number. These methods call the NumberFormat * pure virtual format() methods with the default FieldPosition. * * @param number The value to be formatted. * @param appendTo Output parameter to receive result. * Result is appended to existing contents. * @return Reference to 'appendTo' parameter. * @stable ICU 2.0 */ UnicodeString& format( double number, UnicodeString& appendTo) const; /** * Format a long number. These methods call the NumberFormat * pure virtual format() methods with the default FieldPosition. * * @param number The value to be formatted. * @param appendTo Output parameter to receive result. * Result is appended to existing contents. * @return Reference to 'appendTo' parameter. * @stable ICU 2.0 */ UnicodeString& format( int32_t number, UnicodeString& appendTo) const; /** * Format an int64 number. These methods call the NumberFormat * pure virtual format() methods with the default FieldPosition. * * @param number The value to be formatted. * @param appendTo Output parameter to receive result. * Result is appended to existing contents. * @return Reference to 'appendTo' parameter. * @stable ICU 2.8 */ UnicodeString& format( int64_t number, UnicodeString& appendTo) const; /** * Format a double number. Concrete subclasses must implement * these pure virtual methods. * * @param number The value to be formatted. * @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. * @return Reference to 'appendTo' parameter. * @stable ICU 2.0 */ virtual UnicodeString& format(double number, UnicodeString& appendTo, FieldPosition& pos) const = 0; /** * Format a double number. By default, the parent function simply * calls the base class and does not return an error status. * Therefore, the status may be ignored in some subclasses. * * @param number The value to be formatted. * @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 error status * @return Reference to 'appendTo' parameter. * @internal */ virtual UnicodeString& format(double number, UnicodeString& appendTo, FieldPosition& pos, UErrorCode &status) const; /** * Format a double number. Subclasses must implement * this method. * * @param number The value to be formatted. * @param appendTo Output parameter to receive result. * Result is appended to existing contents. * @param posIter On return, can be used to iterate over positions * of fields generated by this format call. * Can be NULL. * @param status Output param filled with success/failure status. * @return Reference to 'appendTo' parameter. * @stable 4.4 */ virtual UnicodeString& format(double number, UnicodeString& appendTo, FieldPositionIterator* posIter, UErrorCode& status) const; /** * Format a long number. Concrete subclasses must implement * these pure virtual methods. * * @param number The value to be formatted. * @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. * @return Reference to 'appendTo' parameter. * @stable ICU 2.0 */ virtual UnicodeString& format(int32_t number, UnicodeString& appendTo, FieldPosition& pos) const = 0; /** * Format a long number. Concrete subclasses may override * this function to provide status return. * * @param number The value to be formatted. * @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 the output status. * @return Reference to 'appendTo' parameter. * @internal */ virtual UnicodeString& format(int32_t number, UnicodeString& appendTo, FieldPosition& pos, UErrorCode &status) const; /** * Format an int32 number. Subclasses must implement * this method. * * @param number The value to be formatted. * @param appendTo Output parameter to receive result. * Result is appended to existing contents. * @param posIter On return, can be used to iterate over positions * of fields generated by this format call. * Can be NULL. * @param status Output param filled with success/failure status. * @return Reference to 'appendTo' parameter. * @stable 4.4 */ virtual UnicodeString& format(int32_t number, UnicodeString& appendTo, FieldPositionIterator* posIter, UErrorCode& status) const; /** * Format an int64 number. (Not abstract to retain compatibility * with earlier releases, however subclasses should override this * method as it just delegates to format(int32_t number...); * * @param number The value to be formatted. * @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. * @return Reference to 'appendTo' parameter. * @stable ICU 2.8 */ virtual UnicodeString& format(int64_t number, UnicodeString& appendTo, FieldPosition& pos) const; /** * Format an int64 number. (Not abstract to retain compatibility * with earlier releases, however subclasses should override this * method as it just delegates to format(int32_t number...); * * @param number The value to be formatted. * @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. * @return Reference to 'appendTo' parameter. * @internal */ virtual UnicodeString& format(int64_t number, UnicodeString& appendTo, FieldPosition& pos, UErrorCode& status) const; /** * Format an int64 number. Subclasses must implement * this method. * * @param number The value to be formatted. * @param appendTo Output parameter to receive result. * Result is appended to existing contents. * @param posIter On return, can be used to iterate over positions * of fields generated by this format call. * Can be NULL. * @param status Output param filled with success/failure status. * @return Reference to 'appendTo' parameter. * @stable 4.4 */ virtual UnicodeString& format(int64_t number, UnicodeString& appendTo, FieldPositionIterator* posIter, UErrorCode& status) const; /** * Format a decimal number. Subclasses must implement * this method. The syntax of the unformatted number is a "numeric string" * as defined in the Decimal Arithmetic Specification, available at * http://speleotrove.com/decimal * * @param number The unformatted number, as a string, to be formatted. * @param appendTo Output parameter to receive result. * Result is appended to existing contents. * @param posIter On return, can be used to iterate over positions * of fields generated by this format call. * Can be NULL. * @param status Output param filled with success/failure status. * @return Reference to 'appendTo' parameter. * @stable 4.4 */ virtual UnicodeString& format(const StringPiece &number, UnicodeString& appendTo, FieldPositionIterator* posIter, UErrorCode& status) const; public: /** * Format a decimal number. * The number is a DigitList wrapper onto a floating point decimal number. * The default implementation in NumberFormat converts the decimal number * to a double and formats that. Subclasses of NumberFormat that want * to specifically handle big decimal numbers must override this method. * class DecimalFormat does so. * * @param number The number, a DigitList format Decimal Floating Point. * @param appendTo Output parameter to receive result. * Result is appended to existing contents. * @param posIter On return, can be used to iterate over positions * of fields generated by this format call. * @param status Output param filled with success/failure status. * @return Reference to 'appendTo' parameter. * @internal */ virtual UnicodeString& format(const DigitList &number, UnicodeString& appendTo, FieldPositionIterator* posIter, UErrorCode& status) const; /** * Format a decimal number. * The number is a DigitList wrapper onto a floating point decimal number. * The default implementation in NumberFormat converts the decimal number * to a double and formats that. Subclasses of NumberFormat that want * to specifically handle big decimal numbers must override this method. * class DecimalFormat does so. * * @param number The number, a DigitList format Decimal Floating Point. * @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. * @internal */ virtual UnicodeString& format(const DigitList &number, UnicodeString& appendTo, FieldPosition& pos, UErrorCode& status) const; public: /** * Redeclared Format method. * @param obj The object to be formatted. * @param appendTo Output parameter to receive result. * Result is appended to existing contents. * @param status Output parameter set to a failure error code * when a failure occurs. * @return Reference to 'appendTo' parameter. * @stable ICU 2.0 */ UnicodeString& format(const Formattable& obj, UnicodeString& appendTo, UErrorCode& status) const; /** * Return a long if possible (e.g. within range LONG_MAX, * LONG_MAX], and with no decimals), otherwise a double. If * IntegerOnly is set, will stop at a decimal point (or equivalent; * e.g. for rational numbers "1 2/3", will stop after the 1). *
* If no object can be parsed, index is unchanged, and NULL is * returned. *
* This is a pure virtual which concrete subclasses must implement.
*
* @param text The text to be parsed.
* @param result Formattable to be set to the parse result.
* If parse fails, return contents are undefined.
* @param parsePosition The position to start parsing at on input.
* On output, moved to after the last successfully
* parse character. On parse failure, does not change.
* @stable ICU 2.0
*/
virtual void parse(const UnicodeString& text,
Formattable& result,
ParsePosition& parsePosition) const = 0;
/**
* Parse a string as a numeric value, and return a Formattable
* numeric object. This method parses integers only if IntegerOnly
* is set.
*
* @param text The text to be parsed.
* @param result Formattable to be set to the parse result.
* If parse fails, return contents are undefined.
* @param status Output parameter set to a failure error code
* when a failure occurs.
* @see NumberFormat::isParseIntegerOnly
* @stable ICU 2.0
*/
virtual void parse(const UnicodeString& text,
Formattable& result,
UErrorCode& status) const;
/**
* Parses text from the given string as a currency amount. Unlike
* the parse() method, this method will attempt to parse a generic
* currency name, searching for a match of this object's locale's
* currency display names, or for a 3-letter ISO currency code.
* This method will fail if this format is not a currency format,
* that is, if it does not contain the currency pattern symbol
* (U+00A4) in its prefix or suffix.
*
* @param text the string to parse
* @param pos input-output position; on input, the position within text
* to match; must have 0 <= pos.getIndex() < text.length();
* on output, the position after the last matched character.
* If the parse fails, the position in unchanged upon output.
* @return if parse succeeds, a pointer to a newly-created CurrencyAmount
* object (owned by the caller) containing information about
* the parsed currency; if parse fails, this is NULL.
* @stable ICU 49
*/
virtual CurrencyAmount* parseCurrency(const UnicodeString& text,
ParsePosition& pos) const;
/**
* Return true if this format will parse numbers as integers
* only. For example in the English locale, with ParseIntegerOnly
* true, the string "1234." would be parsed as the integer value
* 1234 and parsing would stop at the "." character. Of course,
* the exact format accepted by the parse operation is locale
* dependant and determined by sub-classes of NumberFormat.
* @return true if this format will parse numbers as integers
* only.
* @stable ICU 2.0
*/
UBool isParseIntegerOnly(void) const;
/**
* Sets whether or not numbers should be parsed as integers only.
* @param value set True, this format will parse numbers as integers
* only.
* @see isParseIntegerOnly
* @stable ICU 2.0
*/
virtual void setParseIntegerOnly(UBool value);
/**
* Sets whether lenient parsing should be enabled (it is off by default).
*
* @param enable TRUE if lenient parsing should be used,
* FALSE otherwise.
* @stable ICU 4.8
*/
virtual void setLenient(UBool enable);
/**
* Returns whether lenient parsing is enabled (it is off by default).
*
* @return TRUE if lenient parsing is enabled,
* FALSE otherwise.
* @see #setLenient
* @stable ICU 4.8
*/
virtual UBool isLenient(void) const;
/**
* Returns the default number format for the current default
* locale. The default format is one of the styles provided by
* the other factory methods: getNumberInstance,
* getCurrencyInstance or getPercentInstance. Exactly which one
* is locale dependant.
* @stable ICU 2.0
*/
static NumberFormat* U_EXPORT2 createInstance(UErrorCode&);
/**
* Returns the default number format for the specified locale.
* The default format is one of the styles provided by the other
* factory methods: getNumberInstance, getCurrencyInstance or
* getPercentInstance. Exactly which one is locale dependant.
* @param inLocale the given locale.
* @stable ICU 2.0
*/
static NumberFormat* U_EXPORT2 createInstance(const Locale& inLocale,
UErrorCode&);
/**
* Creates the specified decimal format style of the desired locale.
* @param desiredLocale the given locale.
* @param style the given style.
* @param errorCode Output param filled with success/failure status.
* @return A new NumberFormat instance.
* @stable ICU 4.8
*/
static NumberFormat* U_EXPORT2 createInstance(const Locale& desiredLocale,
UNumberFormatStyle style,
UErrorCode& errorCode);
/**
* Returns a currency format for the current default locale.
* @stable ICU 2.0
*/
static NumberFormat* U_EXPORT2 createCurrencyInstance(UErrorCode&);
/**
* Returns a currency format for the specified locale.
* @param inLocale the given locale.
* @stable ICU 2.0
*/
static NumberFormat* U_EXPORT2 createCurrencyInstance(const Locale& inLocale,
UErrorCode&);
/**
* Returns a percentage format for the current default locale.
* @stable ICU 2.0
*/
static NumberFormat* U_EXPORT2 createPercentInstance(UErrorCode&);
/**
* Returns a percentage format for the specified locale.
* @param inLocale the given locale.
* @stable ICU 2.0
*/
static NumberFormat* U_EXPORT2 createPercentInstance(const Locale& inLocale,
UErrorCode&);
/**
* Returns a scientific format for the current default locale.
* @stable ICU 2.0
*/
static NumberFormat* U_EXPORT2 createScientificInstance(UErrorCode&);
/**
* Returns a scientific format for the specified locale.
* @param inLocale the given locale.
* @stable ICU 2.0
*/
static NumberFormat* U_EXPORT2 createScientificInstance(const Locale& inLocale,
UErrorCode&);
/**
* Get the set of Locales for which NumberFormats are installed.
* @param count Output param to receive the size of the locales
* @stable ICU 2.0
*/
static const Locale* U_EXPORT2 getAvailableLocales(int32_t& count);
#if !UCONFIG_NO_SERVICE
/**
* Register a new NumberFormatFactory. The factory will be adopted.
* @param toAdopt the NumberFormatFactory instance to be adopted
* @param status the in/out status code, no special meanings are assigned
* @return a registry key that can be used to unregister this factory
* @stable ICU 2.6
*/
static URegistryKey U_EXPORT2 registerFactory(NumberFormatFactory* toAdopt, UErrorCode& status);
/**
* Unregister a previously-registered NumberFormatFactory using the key returned from the
* register call. Key becomes invalid after a successful call and should not be used again.
* The NumberFormatFactory corresponding to the key will be deleted.
* @param key the registry key returned by a previous call to registerFactory
* @param status the in/out status code, no special meanings are assigned
* @return TRUE if the factory for the key was successfully unregistered
* @stable ICU 2.6
*/
static UBool U_EXPORT2 unregister(URegistryKey key, UErrorCode& status);
/**
* Return a StringEnumeration over the locales available at the time of the call,
* including registered locales.
* @return a StringEnumeration over the locales available at the time of the call
* @stable ICU 2.6
*/
static StringEnumeration* U_EXPORT2 getAvailableLocales(void);
#endif /* UCONFIG_NO_SERVICE */
/**
* Returns true if grouping is used in this format. For example,
* in the English locale, with grouping on, the number 1234567
* might be formatted as "1,234,567". The grouping separator as
* well as the size of each group is locale dependant and is
* determined by sub-classes of NumberFormat.
* @see setGroupingUsed
* @stable ICU 2.0
*/
UBool isGroupingUsed(void) const;
/**
* Set whether or not grouping will be used in this format.
* @param newValue True, grouping will be used in this format.
* @see getGroupingUsed
* @stable ICU 2.0
*/
virtual void setGroupingUsed(UBool newValue);
/**
* Returns the maximum number of digits allowed in the integer portion of a
* number.
* @return the maximum number of digits allowed in the integer portion of a
* number.
* @see setMaximumIntegerDigits
* @stable ICU 2.0
*/
int32_t getMaximumIntegerDigits(void) const;
/**
* Sets the maximum number of digits allowed in the integer portion of a
* number. maximumIntegerDigits must be >= minimumIntegerDigits. If the
* new value for maximumIntegerDigits is less than the current value
* of minimumIntegerDigits, then minimumIntegerDigits will also be set to
* the new value.
*
* @param newValue the new value for the maximum number of digits
* allowed in the integer portion of a number.
* @see getMaximumIntegerDigits
* @stable ICU 2.0
*/
virtual void setMaximumIntegerDigits(int32_t newValue);
/**
* Returns the minimum number of digits allowed in the integer portion of a
* number.
* @return the minimum number of digits allowed in the integer portion of a
* number.
* @see setMinimumIntegerDigits
* @stable ICU 2.0
*/
int32_t getMinimumIntegerDigits(void) const;
/**
* Sets the minimum number of digits allowed in the integer portion of a
* number. minimumIntegerDigits must be <= maximumIntegerDigits. If the
* new value for minimumIntegerDigits exceeds the current value
* of maximumIntegerDigits, then maximumIntegerDigits will also be set to
* the new value.
* @param newValue the new value to be set.
* @see getMinimumIntegerDigits
* @stable ICU 2.0
*/
virtual void setMinimumIntegerDigits(int32_t newValue);
/**
* Returns the maximum number of digits allowed in the fraction portion of a
* number.
* @return the maximum number of digits allowed in the fraction portion of a
* number.
* @see setMaximumFractionDigits
* @stable ICU 2.0
*/
int32_t getMaximumFractionDigits(void) const;
/**
* Sets the maximum number of digits allowed in the fraction portion of a
* number. maximumFractionDigits must be >= minimumFractionDigits. If the
* new value for maximumFractionDigits is less than the current value
* of minimumFractionDigits, then minimumFractionDigits will also be set to
* the new value.
* @param newValue the new value to be set.
* @see getMaximumFractionDigits
* @stable ICU 2.0
*/
virtual void setMaximumFractionDigits(int32_t newValue);
/**
* Returns the minimum number of digits allowed in the fraction portion of a
* number.
* @return the minimum number of digits allowed in the fraction portion of a
* number.
* @see setMinimumFractionDigits
* @stable ICU 2.0
*/
int32_t getMinimumFractionDigits(void) const;
/**
* Sets the minimum number of digits allowed in the fraction portion of a
* number. minimumFractionDigits must be <= maximumFractionDigits. If the
* new value for minimumFractionDigits exceeds the current value
* of maximumFractionDigits, then maximumIntegerDigits will also be set to
* the new value
* @param newValue the new value to be set.
* @see getMinimumFractionDigits
* @stable ICU 2.0
*/
virtual void setMinimumFractionDigits(int32_t newValue);
/**
* Sets the currency used to display currency
* amounts. This takes effect immediately, if this format is a
* currency format. If this format is not a currency format, then
* the currency is used if and when this object becomes a
* currency format.
* @param theCurrency a 3-letter ISO code indicating new currency
* to use. It need not be null-terminated. May be the empty
* string or NULL to indicate no currency.
* @param ec input-output error code
* @stable ICU 3.0
*/
virtual void setCurrency(const UChar* theCurrency, UErrorCode& ec);
/**
* Gets the currency used to display currency
* amounts. This may be an empty string for some subclasses.
* @return a 3-letter null-terminated ISO code indicating
* the currency in use, or a pointer to the empty string.
* @stable ICU 2.6
*/
const UChar* getCurrency() const;
public:
/**
* Return the class ID for this class. This is useful for
* comparing to a return value from getDynamicClassID(). Note that,
* because NumberFormat is an abstract base class, no fully constructed object
* will have the class ID returned by NumberFormat::getStaticClassID().
* @return The class ID for all objects of this class.
* @stable ICU 2.0
*/
static UClassID U_EXPORT2 getStaticClassID(void);
/**
* Returns a unique class ID POLYMORPHICALLY. Pure virtual override.
* This method is to implement a simple version of RTTI, since not all
* C++ compilers support genuine RTTI. Polymorphic operator==() and
* clone() methods call this method.
*
* @return The class ID for this object. All objects of a * given class have the same class ID. Objects of * other classes have different class IDs. * @stable ICU 2.0 */ virtual UClassID getDynamicClassID(void) const = 0; protected: /** * Default constructor for subclass use only. * @stable ICU 2.0 */ NumberFormat(); /** * Copy constructor. * @stable ICU 2.0 */ NumberFormat(const NumberFormat&); /** * Assignment operator. * @stable ICU 2.0 */ NumberFormat& operator=(const NumberFormat&); /** * Returns the currency in effect for this formatter. Subclasses * should override this method as needed. Unlike getCurrency(), * this method should never return "". * @result output parameter for null-terminated result, which must * have a capacity of at least 4 * @internal */ virtual void getEffectiveCurrency(UChar* result, UErrorCode& ec) const; #ifndef U_HIDE_INTERNAL_API /** * Creates the specified number format style of the desired locale. * If mustBeDecimalFormat is TRUE, then the returned pointer is * either a DecimalFormat or it is NULL. * @internal */ static NumberFormat* makeInstance(const Locale& desiredLocale, UNumberFormatStyle style, UBool mustBeDecimalFormat, UErrorCode& errorCode); #endif /* U_HIDE_INTERNAL_API */ private: static UBool isStyleSupported(UNumberFormatStyle style); /** * Creates the specified decimal format style of the desired locale. * @param desiredLocale the given locale. * @param style the given style. * @param errorCode Output param filled with success/failure status. * @return A new NumberFormat instance. */ static NumberFormat* makeInstance(const Locale& desiredLocale, UNumberFormatStyle style, UErrorCode& errorCode); UBool fGroupingUsed; int32_t fMaxIntegerDigits; int32_t fMinIntegerDigits; int32_t fMaxFractionDigits; int32_t fMinFractionDigits; UBool fParseIntegerOnly; UBool fLenient; // TRUE => lenient parse is enabled // ISO currency code UChar fCurrency[4]; friend class ICUNumberFormatFactory; // access to makeInstance friend class ICUNumberFormatService; friend class ::NumberFormatTest; // access to isStyleSupported() }; #if !UCONFIG_NO_SERVICE /** * A NumberFormatFactory is used to register new number formats. The factory * should be able to create any of the predefined formats for each locale it * supports. When registered, the locales it supports extend or override the * locale already supported by ICU. * * @stable ICU 2.6 */ class U_I18N_API NumberFormatFactory : public UObject { public: /** * Destructor * @stable ICU 3.0 */ virtual ~NumberFormatFactory(); /** * Return true if this factory will be visible. Default is true. * If not visible, the locales supported by this factory will not * be listed by getAvailableLocales. * @stable ICU 2.6 */ virtual UBool visible(void) const = 0; /** * Return the locale names directly supported by this factory. The number of names * is returned in count; * @stable ICU 2.6 */ virtual const UnicodeString * getSupportedIDs(int32_t &count, UErrorCode& status) const = 0; /** * Return a number format of the appropriate type. If the locale * is not supported, return null. If the locale is supported, but * the type is not provided by this service, return null. Otherwise * return an appropriate instance of NumberFormat. * @stable ICU 2.6 */ virtual NumberFormat* createFormat(const Locale& loc, UNumberFormatStyle formatType) = 0; }; /** * A NumberFormatFactory that supports a single locale. It can be visible or invisible. * @stable ICU 2.6 */ class U_I18N_API SimpleNumberFormatFactory : public NumberFormatFactory { protected: /** * True if the locale supported by this factory is visible. * @stable ICU 2.6 */ const UBool _visible; /** * The locale supported by this factory, as a UnicodeString. * @stable ICU 2.6 */ UnicodeString _id; public: /** * @stable ICU 2.6 */ SimpleNumberFormatFactory(const Locale& locale, UBool visible = TRUE); /** * @stable ICU 3.0 */ virtual ~SimpleNumberFormatFactory(); /** * @stable ICU 2.6 */ virtual UBool visible(void) const; /** * @stable ICU 2.6 */ virtual const UnicodeString * getSupportedIDs(int32_t &count, UErrorCode& status) const; }; #endif /* #if !UCONFIG_NO_SERVICE */ // ------------------------------------- inline UBool NumberFormat::isParseIntegerOnly() const { return fParseIntegerOnly; } inline UBool NumberFormat::isLenient() const { return fLenient; } inline UnicodeString& NumberFormat::format(const Formattable& obj, UnicodeString& appendTo, UErrorCode& status) const { return Format::format(obj, appendTo, status); } U_NAMESPACE_END #endif /* #if !UCONFIG_NO_FORMATTING */ #endif // _NUMFMT //eof