To obtain a NumberFormat for a specific locale (including the default * locale) call one of NumberFormat's factory methods such as * createInstance(). Do not call the DecimalFormat constructors directly, unless * you know what you are doing, since the NumberFormat factory methods may * return subclasses other than DecimalFormat. * *
Example Usage * * \code * // Normally we would have a GUI with a menu for this * int32_t locCount; * const Locale* locales = NumberFormat::getAvailableLocales(locCount); * * double myNumber = -1234.56; * UErrorCode success = U_ZERO_ERROR; * NumberFormat* form; * * // Print out a number with the localized number, currency and percent * // format for each locale. * UnicodeString countryName; * UnicodeString displayName; * UnicodeString str; * UnicodeString pattern; * Formattable fmtable; * for (int32_t j = 0; j < 3; ++j) { * cout << endl << "FORMAT " << j << endl; * for (int32_t i = 0; i < locCount; ++i) { * if (locales[i].getCountry(countryName).size() == 0) { * // skip language-only * continue; * } * switch (j) { * case 0: * form = NumberFormat::createInstance(locales[i], success ); break; * case 1: * form = NumberFormat::createCurrencyInstance(locales[i], success ); break; * default: * form = NumberFormat::createPercentInstance(locales[i], success ); break; * } * if (form) { * str.remove(); * pattern = ((DecimalFormat*)form)->toPattern(pattern); * cout << locales[i].getDisplayName(displayName) << ": " << pattern; * cout << " -> " << form->format(myNumber,str) << endl; * form->parse(form->format(myNumber,str), fmtable, success); * delete form; * } * } * } * \endcode *
* Another example use createInstance(style) *
*
* // Print out a number using the localized number, currency,
* // percent, scientific, integer, iso currency, and plural currency
* // format for each locale
* Locale* locale = new Locale("en", "US");
* double myNumber = 1234.56;
* UErrorCode success = U_ZERO_ERROR;
* UnicodeString str;
* Formattable fmtable;
* for (int j=NumberFormat::kNumberStyle;
* j<=NumberFormat::kPluralCurrencyStyle;
* ++j) {
* NumberFormat* format = NumberFormat::createInstance(locale, j, success);
* str.remove();
* cout << "format result " << form->format(myNumber, str) << endl;
* format->parse(form->format(myNumber, str), fmtable, success);
* }
*
*
* Patterns * *
A DecimalFormat consists of a pattern and a set of * symbols. The pattern may be set directly using * applyPattern(), or indirectly using other API methods which * manipulate aspects of the pattern, such as the minimum number of integer * digits. The symbols are stored in a DecimalFormatSymbols * object. When using the NumberFormat factory methods, the * pattern and symbols are read from ICU's locale data. * *
Special Pattern Characters * *
Many characters in a pattern are taken literally; they are matched during * parsing and output unchanged during formatting. Special characters, on the * other hand, stand for other characters, strings, or classes of characters. * For example, the '#' character is replaced by a localized digit. Often the * replacement character is the same as the pattern character; in the U.S. locale, * the ',' grouping character is replaced by ','. However, the replacement is * still happening, and if the symbols are modified, the grouping character * changes. Some special characters affect the behavior of the formatter by * their presence; for example, if the percent character is seen, then the * value is multiplied by 100 before being displayed. * *
To insert a special character in a pattern as a literal, that is, without * any special meaning, the character must be quoted. There are some exceptions to * this which are noted below. * *
The characters listed here are used in non-localized patterns. Localized * patterns use the corresponding characters taken from this formatter's * DecimalFormatSymbols object instead, and these characters lose * their special status. Two exceptions are the currency sign and quote, which * are not localized. * *
| Symbol * | Location * | Localized? * | Meaning * |
0
* | Number * | Yes * | Digit * |
1-9
* | Number * | Yes * | '1' through '9' indicate rounding. * |
\htmlonly@\endhtmlonly
* | Number * | No * | Significant digit * |
#
* | Number * | Yes * | Digit, zero shows as absent * |
.
* | Number * | Yes * | Decimal separator or monetary decimal separator * |
-
* | Number * | Yes * | Minus sign * |
,
* | Number * | Yes * | Grouping separator * |
E
* | Number * | Yes * | Separates mantissa and exponent in scientific notation. * Need not be quoted in prefix or suffix. * |
+
* | Exponent * | Yes * | Prefix positive exponents with localized plus sign. * Need not be quoted in prefix or suffix. * |
;
* | Subpattern boundary * | Yes * | Separates positive and negative subpatterns * |
\%
* | Prefix or suffix * | Yes * | Multiply by 100 and show as percentage * |
\\u2030
* | Prefix or suffix * | Yes * | Multiply by 1000 and show as per mille * |
\htmlonly¤\endhtmlonly (\\u00A4)
* | Prefix or suffix * | No * | Currency sign, replaced by currency symbol. If * doubled, replaced by international currency symbol. * If tripled, replaced by currency plural names, for example, * "US dollar" or "US dollars" for America. * If present in a pattern, the monetary decimal separator * is used instead of the decimal separator. * |
'
* | Prefix or suffix * | No * | Used to quote special characters in a prefix or suffix,
* for example, "'#'#" formats 123 to
* "#123". To create a single quote
* itself, use two in a row: "# o''clock".
* |
*
* | Prefix or suffix boundary * | Yes * | Pad escape, precedes pad character * |
A DecimalFormat pattern contains a postive and negative * subpattern, for example, "#,##0.00;(#,##0.00)". Each subpattern has a * prefix, a numeric part, and a suffix. If there is no explicit negative * subpattern, the negative subpattern is the localized minus sign prefixed to the * positive subpattern. That is, "0.00" alone is equivalent to "0.00;-0.00". If there * is an explicit negative subpattern, it serves only to specify the negative * prefix and suffix; the number of digits, minimal digits, and other * characteristics are ignored in the negative subpattern. That means that * "#,##0.0#;(#)" has precisely the same result as "#,##0.0#;(#,##0.0#)". * *
The prefixes, suffixes, and various symbols used for infinity, digits, * thousands separators, decimal separators, etc. may be set to arbitrary * values, and they will appear properly during formatting. However, care must * be taken that the symbols and strings do not conflict, or parsing will be * unreliable. For example, either the positive and negative prefixes or the * suffixes must be distinct for parse() to be able * to distinguish positive from negative values. Another example is that the * decimal separator and thousands separator should be distinct characters, or * parsing will be impossible. * *
The grouping separator is a character that separates clusters of * integer digits to make large numbers more legible. It commonly used for * thousands, but in some locales it separates ten-thousands. The grouping * size is the number of digits between the grouping separators, such as 3 * for "100,000,000" or 4 for "1 0000 0000". There are actually two different * grouping sizes: One used for the least significant integer digits, the * primary grouping size, and one used for all others, the * secondary grouping size. In most locales these are the same, but * sometimes they are different. For example, if the primary grouping interval * is 3, and the secondary is 2, then this corresponds to the pattern * "#,##,##0", and the number 123456789 is formatted as "12,34,56,789". If a * pattern contains multiple grouping separators, the interval between the last * one and the end of the integer defines the primary grouping size, and the * interval between the last two defines the secondary grouping size. All others * are ignored, so "#,##,###,####" == "###,###,####" == "##,#,###,####". * *
Illegal patterns, such as "#.#.#" or "#.###,###", will cause * DecimalFormat to set a failing UErrorCode. * *
Pattern BNF * *
* pattern := subpattern (';' subpattern)?
* subpattern := prefix? number exponent? suffix?
* number := (integer ('.' fraction)?) | sigDigits
* prefix := '\\u0000'..'\\uFFFD' - specialCharacters
* suffix := '\\u0000'..'\\uFFFD' - specialCharacters
* integer := '#'* '0'* '0'
* fraction := '0'* '#'*
* sigDigits := '#'* '@' '@'* '#'*
* exponent := 'E' '+'? '0'* '0'
* padSpec := '*' padChar
* padChar := '\\u0000'..'\\uFFFD' - quote
*
* Notation:
* X* 0 or more instances of X
* X? 0 or 1 instances of X
* X|Y either X or Y
* C..D any character from C up to D, inclusive
* S-T characters in S, except those in T
*
* The first subpattern is for positive numbers. The second (optional)
* subpattern is for negative numbers.
*
* Not indicated in the BNF syntax above: * *
padSpec may appear before the prefix,
* after the prefix, before the suffix, after the suffix, or not at all.
*
* Parsing * *
DecimalFormat parses all Unicode characters that represent * decimal digits, as defined by u_charDigitValue(). In addition, * DecimalFormat also recognizes as digits the ten consecutive * characters starting with the localized zero digit defined in the * DecimalFormatSymbols object. During formatting, the * DecimalFormatSymbols-based digits are output. * *
During parsing, grouping separators are ignored. * *
For currency parsing, the formatter is able to parse every currency * style formats no matter which style the formatter is constructed with. * For example, a formatter instance gotten from * NumberFormat.getInstance(ULocale, NumberFormat.CURRENCYSTYLE) can parse * formats such as "USD1.00" and "3.00 US dollars". * *
If parse(UnicodeString&,Formattable&,ParsePosition&) * fails to parse a string, it leaves the parse position unchanged. * The convenience method parse(UnicodeString&,Formattable&,UErrorCode&) * indicates parse failure by setting a failing * UErrorCode. * *
Formatting * *
Formatting is guided by several parameters, all of which can be * specified either using a pattern or using the API. The following * description applies to formats that do not use scientific * notation or significant digits. * *
Special Values * *
NaN is represented as a single character, typically
* \\uFFFD. This character is determined by the
* DecimalFormatSymbols object. This is the only value for which
* the prefixes and suffixes are not used.
*
*
Infinity is represented as a single character, typically
* \\u221E, with the positive or negative prefixes and suffixes
* applied. The infinity character is determined by the
* DecimalFormatSymbols object.
*
* Scientific Notation
*
*
Numbers in scientific notation are expressed as the product of a mantissa * and a power of ten, for example, 1234 can be expressed as 1.234 x 103. The * mantissa is typically in the half-open interval [1.0, 10.0) or sometimes [0.0, 1.0), * but it need not be. DecimalFormat supports arbitrary mantissas. * DecimalFormat can be instructed to use scientific * notation through the API or through the pattern. In a pattern, the exponent * character immediately followed by one or more digit characters indicates * scientific notation. Example: "0.###E0" formats the number 1234 as * "1.234E3". * *
DecimalFormat has two ways of controlling how many
* digits are shows: (a) significant digits counts, or (b) integer and
* fraction digit counts. Integer and fraction digit counts are
* described above. When a formatter is using significant digits
* counts, the number of integer and fraction digits is not specified
* directly, and the formatter settings for these counts are ignored.
* Instead, the formatter uses however many integer and fraction
* digits are required to display the specified number of significant
* digits. Examples:
*
* | Pattern * | Minimum significant digits * | Maximum significant digits * | Number * | Output of format() * |
\@\@\@
* | 3 * | 3 * | 12345 * | 12300
* |
\@\@\@
* | 3 * | 3 * | 0.12345 * | 0.123
* |
\@\@##
* | 2 * | 4 * | 3.14159 * | 3.142
* |
\@\@##
* | 2 * | 4 * | 1.23004 * | 1.23
* |
'@' and '#'
* characters. The minimum number of significant digits is the number
* of '@' characters. The maximum number of significant
* digits is the number of '@' characters plus the number
* of '#' characters following on the right. For
* example, the pattern "@@@" indicates exactly 3
* significant digits. The pattern "@##" indicates from
* 1 to 3 significant digits. Trailing zero digits to the right of
* the decimal separator are suppressed after the minimum number of
* significant digits have been shown. For example, the pattern
* "@##" formats the number 0.1203 as
* "0.12".
*
* '0' pattern character.
* Patterns such as "@00" or "@.###" are
* disallowed.
*
* '#' characters may be prepended to
* the left of the leftmost '@' character. These have no
* effect on the minimum and maximum significant digits counts, but
* may be used to position grouping separators. For example,
* "#,#@#" indicates a minimum of one significant digits,
* a maximum of two significant digits, and a grouping size of three.
*
* '@' pattern character. Alternatively,
* call setSignificantDigitsUsed(TRUE).
*
* '@' pattern
* character. Alternatively, call setSignificantDigitsUsed(FALSE).
*
* getMinimumSignificantDigits() - 1, and a maximum fraction digit
* count of getMaximumSignificantDigits() - 1. For example, the
* pattern "@@###E0" is equivalent to "0.0###E0".
*
* Padding * *
DecimalFormat supports padding the result of
* format() to a specific width. Padding may be specified either
* through the API or through the pattern syntax. In a pattern the pad escape
* character, followed by a single pad character, causes padding to be parsed
* and formatted. The pad escape character is '*' in unlocalized patterns, and
* can be localized using DecimalFormatSymbols::setSymbol() with a
* DecimalFormatSymbols::kPadEscapeSymbol
* selector. For example, "$*x#,##0.00" formats 123 to
* "$xx123.00", and 1234 to "$1,234.00".
*
*
"* #0 o''clock", the format width is 10.
*
* Rounding * *
DecimalFormat supports rounding to a specific increment. For * example, 1230 rounded to the nearest 50 is 1250. 1.234 rounded to the * nearest 0.65 is 1.3. The rounding increment may be specified through the API * or in a pattern. To specify a rounding increment in a pattern, include the * increment in the pattern itself. "#,#50" specifies a rounding increment of * 50. "#,##0.05" specifies a rounding increment of 0.05. * *
Synchronization * *
DecimalFormat objects are not synchronized. Multiple * threads should not access one formatter concurrently. * *
Subclassing * *
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. */ class U_I18N_API DecimalFormat: public NumberFormat { public: /** * Rounding mode. * @stable ICU 2.4 */ enum ERoundingMode { kRoundCeiling, /**< Round towards positive infinity */ kRoundFloor, /**< Round towards negative infinity */ kRoundDown, /**< Round towards zero */ kRoundUp, /**< Round away from zero */ kRoundHalfEven, /**< Round towards the nearest integer, or towards the nearest even integer if equidistant */ kRoundHalfDown, /**< Round towards the nearest integer, or towards zero if equidistant */ kRoundHalfUp /**< Round towards the nearest integer, or away from zero if equidistant */ // We don't support ROUND_UNNECESSARY }; /** * Pad position. * @stable ICU 2.4 */ enum EPadPosition { kPadBeforePrefix, kPadAfterPrefix, kPadBeforeSuffix, kPadAfterSuffix }; /** * Create a DecimalFormat using the default pattern and symbols * for the default locale. This is a convenient way to obtain a * DecimalFormat when internationalization is not the main concern. *
* To obtain standard formats for a given locale, use the factory methods * on NumberFormat such as createInstance. These factories will * return the most appropriate sub-class of NumberFormat for a given * locale. * @param status Output param set to success/failure code. If the * pattern is invalid this will be set to a failure code. * @stable ICU 2.0 */ DecimalFormat(UErrorCode& status); /** * Create a DecimalFormat from the given pattern and the symbols * for the default locale. This is a convenient way to obtain a * DecimalFormat when internationalization is not the main concern. *
* To obtain standard formats for a given locale, use the factory methods * on NumberFormat such as createInstance. These factories will * return the most appropriate sub-class of NumberFormat for a given * locale. * @param pattern A non-localized pattern string. * @param status Output param set to success/failure code. If the * pattern is invalid this will be set to a failure code. * @stable ICU 2.0 */ DecimalFormat(const UnicodeString& pattern, UErrorCode& status); /** * Create a DecimalFormat from the given pattern and symbols. * Use this constructor when you need to completely customize the * behavior of the format. *
* To obtain standard formats for a given * locale, use the factory methods on NumberFormat such as * createInstance or createCurrencyInstance. If you need only minor adjustments * to a standard format, you can modify the format returned by * a NumberFormat factory method. * * @param pattern a non-localized pattern string * @param symbolsToAdopt the set of symbols to be used. The caller should not * delete this object after making this call. * @param status Output param set to success/failure code. If the * pattern is invalid this will be set to a failure code. * @stable ICU 2.0 */ DecimalFormat( const UnicodeString& pattern, DecimalFormatSymbols* symbolsToAdopt, UErrorCode& status); /** * This API is for ICU use only. * Create a DecimalFormat from the given pattern, symbols, and style. * * @param pattern a non-localized pattern string * @param symbolsToAdopt the set of symbols to be used. The caller should not * delete this object after making this call. * @param style style of decimal format, kNumberStyle etc. * @param status Output param set to success/failure code. If the * pattern is invalid this will be set to a failure code. * @internal ICU 4.2 */ DecimalFormat( const UnicodeString& pattern, DecimalFormatSymbols* symbolsToAdopt, NumberFormat::EStyles style, UErrorCode& status); /** * Create a DecimalFormat from the given pattern and symbols. * Use this constructor when you need to completely customize the * behavior of the format. *
* To obtain standard formats for a given * locale, use the factory methods on NumberFormat such as * createInstance or createCurrencyInstance. If you need only minor adjustments * to a standard format, you can modify the format returned by * a NumberFormat factory method. * * @param pattern a non-localized pattern string * @param symbolsToAdopt the set of symbols to be used. The caller should not * delete this object after making this call. * @param parseError Output param to receive errors occured during parsing * @param status Output param set to success/failure code. If the * pattern is invalid this will be set to a failure code. * @stable ICU 2.0 */ DecimalFormat( const UnicodeString& pattern, DecimalFormatSymbols* symbolsToAdopt, UParseError& parseError, UErrorCode& status); /** * Create a DecimalFormat from the given pattern and symbols. * Use this constructor when you need to completely customize the * behavior of the format. *
* To obtain standard formats for a given * locale, use the factory methods on NumberFormat such as * createInstance or createCurrencyInstance. If you need only minor adjustments * to a standard format, you can modify the format returned by * a NumberFormat factory method. * * @param pattern a non-localized pattern string * @param symbols the set of symbols to be used * @param status Output param set to success/failure code. If the * pattern is invalid this will be set to a failure code. * @stable ICU 2.0 */ DecimalFormat( const UnicodeString& pattern, const DecimalFormatSymbols& symbols, UErrorCode& status); /** * Copy constructor. * * @param source the DecimalFormat object to be copied from. * @stable ICU 2.0 */ DecimalFormat(const DecimalFormat& source); /** * Assignment operator. * * @param rhs the DecimalFormat object to be copied. * @stable ICU 2.0 */ DecimalFormat& operator=(const DecimalFormat& rhs); /** * Destructor. * @stable ICU 2.0 */ virtual ~DecimalFormat(); /** * Clone this Format object polymorphically. The caller owns the * result and should delete it when done. * * @return a polymorphic copy of this DecimalFormat. * @stable ICU 2.0 */ virtual Format* clone(void) const; /** * 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 true if the given Format objects are semantically equal. * @stable ICU 2.0 */ virtual UBool operator==(const Format& other) const; /** * Format a double or long number using base-10 representation. * * @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; /** * Format a long number using base-10 representation. * * @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; /** * Format an int64 number using base-10 representation. * * @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 a Formattable using base-10 representation. * * @param obj 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 code indicating success or failure. * @return Reference to 'appendTo' parameter. * @stable ICU 2.0 */ virtual UnicodeString& format(const Formattable& obj, UnicodeString& appendTo, FieldPosition& pos, UErrorCode& status) const; /** * Redeclared NumberFormat method. * Formats an object to produce a string. * * @param obj The object to format. * @param appendTo Output parameter to receive result. * Result is appended to existing contents. * @param status Output parameter filled in with success or failure status. * @return Reference to 'appendTo' parameter. * @stable ICU 2.0 */ UnicodeString& format(const Formattable& obj, UnicodeString& appendTo, UErrorCode& status) const; /** * Redeclared NumberFormat method. * Format a double number. * * @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; /** * Redeclared NumberFormat method. * 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; /** * Redeclared NumberFormat method. * 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; /** * Parse the given string using this object's choices. The method * does string comparisons to try to find an optimal match. * If no object can be parsed, index is unchanged, and NULL is * returned. The result is returned as the most parsimonious * type of Formattable that will accomodate all of the * necessary precision. For example, if the result is exactly 12, * it will be returned as a long. However, if it is 1.5, it will * be returned as a double. * * @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. * @see Formattable * @stable ICU 2.0 */ virtual void parse(const UnicodeString& text, Formattable& result, ParsePosition& parsePosition) const; // Declare here again to get rid of function hiding problems. /** * Parse the given string using this object's choices. * * @param text The text to be parsed. * @param result Formattable to be set to the parse result. * @param status Output parameter filled in with success or failure status. * @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 result output parameter to receive result. This will have * its currency set to the parsed ISO currency code. * @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 a reference to result * @internal */ virtual Formattable& parseCurrency(const UnicodeString& text, Formattable& result, ParsePosition& pos) const; /** * Returns the decimal format symbols, which is generally not changed * by the programmer or user. * @return desired DecimalFormatSymbols * @see DecimalFormatSymbols * @stable ICU 2.0 */ virtual const DecimalFormatSymbols* getDecimalFormatSymbols(void) const; /** * Sets the decimal format symbols, which is generally not changed * by the programmer or user. * @param symbolsToAdopt DecimalFormatSymbols to be adopted. * @stable ICU 2.0 */ virtual void adoptDecimalFormatSymbols(DecimalFormatSymbols* symbolsToAdopt); /** * Sets the decimal format symbols, which is generally not changed * by the programmer or user. * @param symbols DecimalFormatSymbols. * @stable ICU 2.0 */ virtual void setDecimalFormatSymbols(const DecimalFormatSymbols& symbols); /** * Returns the currency plural format information, * which is generally not changed by the programmer or user. * @return desired CurrencyPluralInfo * @draft ICU 4.2 */ virtual const CurrencyPluralInfo* getCurrencyPluralInfo(void) const; /** * Sets the currency plural format information, * which is generally not changed by the programmer or user. * @param toAdopt CurrencyPluralInfo to be adopted. * @draft ICU 4.2 */ virtual void adoptCurrencyPluralInfo(CurrencyPluralInfo* toAdopt); /** * Sets the currency plural format information, * which is generally not changed by the programmer or user. * @param info Currency Plural Info. * @draft ICU 4.2 */ virtual void setCurrencyPluralInfo(const CurrencyPluralInfo& info); /** * Get the positive prefix. * * @param result Output param which will receive the positive prefix. * @return A reference to 'result'. * Examples: +123, $123, sFr123 * @stable ICU 2.0 */ UnicodeString& getPositivePrefix(UnicodeString& result) const; /** * Set the positive prefix. * * @param newValue the new value of the the positive prefix to be set. * Examples: +123, $123, sFr123 * @stable ICU 2.0 */ virtual void setPositivePrefix(const UnicodeString& newValue); /** * Get the negative prefix. * * @param result Output param which will receive the negative prefix. * @return A reference to 'result'. * Examples: -123, ($123) (with negative suffix), sFr-123 * @stable ICU 2.0 */ UnicodeString& getNegativePrefix(UnicodeString& result) const; /** * Set the negative prefix. * * @param newValue the new value of the the negative prefix to be set. * Examples: -123, ($123) (with negative suffix), sFr-123 * @stable ICU 2.0 */ virtual void setNegativePrefix(const UnicodeString& newValue); /** * Get the positive suffix. * * @param result Output param which will receive the positive suffix. * @return A reference to 'result'. * Example: 123% * @stable ICU 2.0 */ UnicodeString& getPositiveSuffix(UnicodeString& result) const; /** * Set the positive suffix. * * @param newValue the new value of the positive suffix to be set. * Example: 123% * @stable ICU 2.0 */ virtual void setPositiveSuffix(const UnicodeString& newValue); /** * Get the negative suffix. * * @param result Output param which will receive the negative suffix. * @return A reference to 'result'. * Examples: -123%, ($123) (with positive suffixes) * @stable ICU 2.0 */ UnicodeString& getNegativeSuffix(UnicodeString& result) const; /** * Set the negative suffix. * * @param newValue the new value of the negative suffix to be set. * Examples: 123% * @stable ICU 2.0 */ virtual void setNegativeSuffix(const UnicodeString& newValue); /** * Get the multiplier for use in percent, permill, etc. * For a percentage, set the suffixes to have "%" and the multiplier to be 100. * (For Arabic, use arabic percent symbol). * For a permill, set the suffixes to have "\\u2031" and the multiplier to be 1000. * * @return the multiplier for use in percent, permill, etc. * Examples: with 100, 1.23 -> "123", and "123" -> 1.23 * @stable ICU 2.0 */ int32_t getMultiplier(void) const; /** * Set the multiplier for use in percent, permill, etc. * For a percentage, set the suffixes to have "%" and the multiplier to be 100. * (For Arabic, use arabic percent symbol). * For a permill, set the suffixes to have "\\u2031" and the multiplier to be 1000. * * @param newValue the new value of the multiplier for use in percent, permill, etc. * Examples: with 100, 1.23 -> "123", and "123" -> 1.23 * @stable ICU 2.0 */ virtual void setMultiplier(int32_t newValue); /** * Get the rounding increment. * @return A positive rounding increment, or 0.0 if rounding * is not in effect. * @see #setRoundingIncrement * @see #getRoundingMode * @see #setRoundingMode * @stable ICU 2.0 */ virtual double getRoundingIncrement(void) const; /** * Set the rounding increment. This method also controls whether * rounding is enabled. * @param newValue A positive rounding increment, or 0.0 to disable rounding. * Negative increments are equivalent to 0.0. * @see #getRoundingIncrement * @see #getRoundingMode * @see #setRoundingMode * @stable ICU 2.0 */ virtual void setRoundingIncrement(double newValue); /** * Get the rounding mode. * @return A rounding mode * @see #setRoundingIncrement * @see #getRoundingIncrement * @see #setRoundingMode * @stable ICU 2.0 */ virtual ERoundingMode getRoundingMode(void) const; /** * Set the rounding mode. This has no effect unless the rounding * increment is greater than zero. * @param roundingMode A rounding mode * @see #setRoundingIncrement * @see #getRoundingIncrement * @see #getRoundingMode * @stable ICU 2.0 */ virtual void setRoundingMode(ERoundingMode roundingMode); /** * Get the width to which the output of format() is padded. * The width is counted in 16-bit code units. * @return the format width, or zero if no padding is in effect * @see #setFormatWidth * @see #getPadCharacterString * @see #setPadCharacter * @see #getPadPosition * @see #setPadPosition * @stable ICU 2.0 */ virtual int32_t getFormatWidth(void) const; /** * Set the width to which the output of format() is padded. * The width is counted in 16-bit code units. * This method also controls whether padding is enabled. * @param width the width to which to pad the result of * format(), or zero to disable padding. A negative * width is equivalent to 0. * @see #getFormatWidth * @see #getPadCharacterString * @see #setPadCharacter * @see #getPadPosition * @see #setPadPosition * @stable ICU 2.0 */ virtual void setFormatWidth(int32_t width); /** * Get the pad character used to pad to the format width. The * default is ' '. * @return a string containing the pad character. This will always * have a length of one 32-bit code point. * @see #setFormatWidth * @see #getFormatWidth * @see #setPadCharacter * @see #getPadPosition * @see #setPadPosition * @stable ICU 2.0 */ virtual UnicodeString getPadCharacterString() const; /** * Set the character used to pad to the format width. If padding * is not enabled, then this will take effect if padding is later * enabled. * @param padChar a string containing the pad charcter. If the string * has length 0, then the pad characer is set to ' '. Otherwise * padChar.char32At(0) will be used as the pad character. * @see #setFormatWidth * @see #getFormatWidth * @see #getPadCharacterString * @see #getPadPosition * @see #setPadPosition * @stable ICU 2.0 */ virtual void setPadCharacter(const UnicodeString &padChar); /** * Get the position at which padding will take place. This is the location * at which padding will be inserted if the result of format() * is shorter than the format width. * @return the pad position, one of kPadBeforePrefix, * kPadAfterPrefix, kPadBeforeSuffix, or * kPadAfterSuffix. * @see #setFormatWidth * @see #getFormatWidth * @see #setPadCharacter * @see #getPadCharacterString * @see #setPadPosition * @see #EPadPosition * @stable ICU 2.0 */ virtual EPadPosition getPadPosition(void) const; /** * Set the position at which padding will take place. This is the location * at which padding will be inserted if the result of format() * is shorter than the format width. This has no effect unless padding is * enabled. * @param padPos the pad position, one of kPadBeforePrefix, * kPadAfterPrefix, kPadBeforeSuffix, or * kPadAfterSuffix. * @see #setFormatWidth * @see #getFormatWidth * @see #setPadCharacter * @see #getPadCharacterString * @see #getPadPosition * @see #EPadPosition * @stable ICU 2.0 */ virtual void setPadPosition(EPadPosition padPos); /** * Return whether or not scientific notation is used. * @return TRUE if this object formats and parses scientific notation * @see #setScientificNotation * @see #getMinimumExponentDigits * @see #setMinimumExponentDigits * @see #isExponentSignAlwaysShown * @see #setExponentSignAlwaysShown * @stable ICU 2.0 */ virtual UBool isScientificNotation(void); /** * Set whether or not scientific notation is used. When scientific notation * is used, the effective maximum number of integer digits is <= 8. If the * maximum number of integer digits is set to more than 8, the effective * maximum will be 1. This allows this call to generate a 'default' scientific * number format without additional changes. * @param useScientific TRUE if this object formats and parses scientific * notation * @see #isScientificNotation * @see #getMinimumExponentDigits * @see #setMinimumExponentDigits * @see #isExponentSignAlwaysShown * @see #setExponentSignAlwaysShown * @stable ICU 2.0 */ virtual void setScientificNotation(UBool useScientific); /** * Return the minimum exponent digits that will be shown. * @return the minimum exponent digits that will be shown * @see #setScientificNotation * @see #isScientificNotation * @see #setMinimumExponentDigits * @see #isExponentSignAlwaysShown * @see #setExponentSignAlwaysShown * @stable ICU 2.0 */ virtual int8_t getMinimumExponentDigits(void) const; /** * Set the minimum exponent digits that will be shown. This has no * effect unless scientific notation is in use. * @param minExpDig a value >= 1 indicating the fewest exponent digits * that will be shown. Values less than 1 will be treated as 1. * @see #setScientificNotation * @see #isScientificNotation * @see #getMinimumExponentDigits * @see #isExponentSignAlwaysShown * @see #setExponentSignAlwaysShown * @stable ICU 2.0 */ virtual void setMinimumExponentDigits(int8_t minExpDig); /** * Return whether the exponent sign is always shown. * @return TRUE if the exponent is always prefixed with either the * localized minus sign or the localized plus sign, false if only negative * exponents are prefixed with the localized minus sign. * @see #setScientificNotation * @see #isScientificNotation * @see #setMinimumExponentDigits * @see #getMinimumExponentDigits * @see #setExponentSignAlwaysShown * @stable ICU 2.0 */ virtual UBool isExponentSignAlwaysShown(void); /** * Set whether the exponent sign is always shown. This has no effect * unless scientific notation is in use. * @param expSignAlways TRUE if the exponent is always prefixed with either * the localized minus sign or the localized plus sign, false if only * negative exponents are prefixed with the localized minus sign. * @see #setScientificNotation * @see #isScientificNotation * @see #setMinimumExponentDigits * @see #getMinimumExponentDigits * @see #isExponentSignAlwaysShown * @stable ICU 2.0 */ virtual void setExponentSignAlwaysShown(UBool expSignAlways); /** * Return the grouping size. Grouping size is the number of digits between * grouping separators in the integer portion of a number. For example, * in the number "123,456.78", the grouping size is 3. * * @return the grouping size. * @see setGroupingSize * @see NumberFormat::isGroupingUsed * @see DecimalFormatSymbols::getGroupingSeparator * @stable ICU 2.0 */ int32_t getGroupingSize(void) const; /** * Set the grouping size. Grouping size is the number of digits between * grouping separators in the integer portion of a number. For example, * in the number "123,456.78", the grouping size is 3. * * @param newValue the new value of the grouping size. * @see getGroupingSize * @see NumberFormat::setGroupingUsed * @see DecimalFormatSymbols::setGroupingSeparator * @stable ICU 2.0 */ virtual void setGroupingSize(int32_t newValue); /** * Return the secondary grouping size. In some locales one * grouping interval is used for the least significant integer * digits (the primary grouping size), and another is used for all * others (the secondary grouping size). A formatter supporting a * secondary grouping size will return a positive integer unequal * to the primary grouping size returned by * getGroupingSize(). For example, if the primary * grouping size is 4, and the secondary grouping size is 2, then * the number 123456789 formats as "1,23,45,6789", and the pattern * appears as "#,##,###0". * @return the secondary grouping size, or a value less than * one if there is none * @see setSecondaryGroupingSize * @see NumberFormat::isGroupingUsed * @see DecimalFormatSymbols::getGroupingSeparator * @stable ICU 2.4 */ int32_t getSecondaryGroupingSize(void) const; /** * Set the secondary grouping size. If set to a value less than 1, * then secondary grouping is turned off, and the primary grouping * size is used for all intervals, not just the least significant. * * @param newValue the new value of the secondary grouping size. * @see getSecondaryGroupingSize * @see NumberFormat#setGroupingUsed * @see DecimalFormatSymbols::setGroupingSeparator * @stable ICU 2.4 */ virtual void setSecondaryGroupingSize(int32_t newValue); /** * Allows you to get the behavior of the decimal separator with integers. * (The decimal separator will always appear with decimals.) * * @return TRUE if the decimal separator always appear with decimals. * Example: Decimal ON: 12345 -> 12345.; OFF: 12345 -> 12345 * @stable ICU 2.0 */ UBool isDecimalSeparatorAlwaysShown(void) const; /** * Allows you to set the behavior of the decimal separator with integers. * (The decimal separator will always appear with decimals.) * * @param newValue set TRUE if the decimal separator will always appear with decimals. * Example: Decimal ON: 12345 -> 12345.; OFF: 12345 -> 12345 * @stable ICU 2.0 */ virtual void setDecimalSeparatorAlwaysShown(UBool newValue); /** * Synthesizes a pattern string that represents the current state * of this Format object. * * @param result Output param which will receive the pattern. * Previous contents are deleted. * @return A reference to 'result'. * @see applyPattern * @stable ICU 2.0 */ virtual UnicodeString& toPattern(UnicodeString& result) const; /** * Synthesizes a localized pattern string that represents the current * state of this Format object. * * @param result Output param which will receive the localized pattern. * Previous contents are deleted. * @return A reference to 'result'. * @see applyPattern * @stable ICU 2.0 */ virtual UnicodeString& toLocalizedPattern(UnicodeString& result) const; /** * Apply the given pattern to this Format object. A pattern is a * short-hand specification for the various formatting properties. * These properties can also be changed individually through the * various setter methods. *
* There is no limit to integer digits are set * by this routine, since that is the typical end-user desire; * use setMaximumInteger if you want to set a real value. * For negative numbers, use a second pattern, separated by a semicolon *
* . Example "#,#00.0#" -> 1,234.56
*
* This means a minimum of 2 integer digits, 1 fraction digit, and
* a maximum of 2 fraction digits.
*
* . Example: "#,#00.0#;(#,#00.0#)" for negatives in parantheses.
*
* In negative patterns, the minimum and maximum counts are ignored;
* these are presumed to be set in the positive pattern.
*
* @param pattern The pattern to be applied.
* @param parseError Struct to recieve information on position
* of error if an error is encountered
* @param status Output param set to success/failure code on
* exit. If the pattern is invalid, this will be
* set to a failure result.
* @stable ICU 2.0
*/
virtual void applyPattern(const UnicodeString& pattern,
UParseError& parseError,
UErrorCode& status);
/**
* Sets the pattern.
* @param pattern The pattern to be applied.
* @param status Output param set to success/failure code on
* exit. If the pattern is invalid, this will be
* set to a failure result.
* @stable ICU 2.0
*/
virtual void applyPattern(const UnicodeString& pattern,
UErrorCode& status);
/**
* Apply the given pattern to this Format object. The pattern
* is assumed to be in a localized notation. A pattern is a
* short-hand specification for the various formatting properties.
* These properties can also be changed individually through the
* various setter methods.
* * There is no limit to integer digits are set * by this routine, since that is the typical end-user desire; * use setMaximumInteger if you want to set a real value. * For negative numbers, use a second pattern, separated by a semicolon *
* . Example "#,#00.0#" -> 1,234.56
*
* This means a minimum of 2 integer digits, 1 fraction digit, and
* a maximum of 2 fraction digits.
*
* Example: "#,#00.0#;(#,#00.0#)" for negatives in parantheses.
*
* In negative patterns, the minimum and maximum counts are ignored;
* these are presumed to be set in the positive pattern.
*
* @param pattern The localized pattern to be applied.
* @param parseError Struct to recieve information on position
* of error if an error is encountered
* @param status Output param set to success/failure code on
* exit. If the pattern is invalid, this will be
* set to a failure result.
* @stable ICU 2.0
*/
virtual void applyLocalizedPattern(const UnicodeString& pattern,
UParseError& parseError,
UErrorCode& status);
/**
* Apply the given pattern to this Format object.
*
* @param pattern The localized pattern to be applied.
* @param status Output param set to success/failure code on
* exit. If the pattern is invalid, this will be
* set to a failure result.
* @stable ICU 2.0
*/
virtual void applyLocalizedPattern(const UnicodeString& pattern,
UErrorCode& status);
/**
* Sets the maximum number of digits allowed in the integer portion of a
* number. This override limits the integer digit count to 309.
*
* @param newValue the new value of the maximum number of digits
* allowed in the integer portion of a number.
* @see NumberFormat#setMaximumIntegerDigits
* @stable ICU 2.0
*/
virtual void setMaximumIntegerDigits(int32_t newValue);
/**
* Sets the minimum number of digits allowed in the integer portion of a
* number. This override limits the integer digit count to 309.
*
* @param newValue the new value of the minimum number of digits
* allowed in the integer portion of a number.
* @see NumberFormat#setMinimumIntegerDigits
* @stable ICU 2.0
*/
virtual void setMinimumIntegerDigits(int32_t newValue);
/**
* Sets the maximum number of digits allowed in the fraction portion of a
* number. This override limits the fraction digit count to 340.
*
* @param newValue the new value of the maximum number of digits
* allowed in the fraction portion of a number.
* @see NumberFormat#setMaximumFractionDigits
* @stable ICU 2.0
*/
virtual void setMaximumFractionDigits(int32_t newValue);
/**
* Sets the minimum number of digits allowed in the fraction portion of a
* number. This override limits the fraction digit count to 340.
*
* @param newValue the new value of the minimum number of digits
* allowed in the fraction portion of a number.
* @see NumberFormat#setMinimumFractionDigits
* @stable ICU 2.0
*/
virtual void setMinimumFractionDigits(int32_t newValue);
/**
* Returns the minimum number of significant digits that will be
* displayed. This value has no effect unless areSignificantDigitsUsed()
* returns true.
* @return the fewest significant digits that will be shown
* @stable ICU 3.0
*/
int32_t getMinimumSignificantDigits() const;
/**
* Returns the maximum number of significant digits that will be
* displayed. This value has no effect unless areSignificantDigitsUsed()
* returns true.
* @return the most significant digits that will be shown
* @stable ICU 3.0
*/
int32_t getMaximumSignificantDigits() const;
/**
* Sets the minimum number of significant digits that will be
* displayed. If min is less than one then it is set
* to one. If the maximum significant digits count is less than
* min, then it is set to min. This
* value has no effect unless areSignificantDigits() returns true.
* @param min the fewest significant digits to be shown
* @stable ICU 3.0
*/
void setMinimumSignificantDigits(int32_t min);
/**
* Sets the maximum number of significant digits that will be
* displayed. If max is less than one then it is set
* to one. If the minimum significant digits count is greater
* than max, then it is set to max.
* This value has no effect unless areSignificantDigits() returns
* true.
* @param max the most significant digits to be shown
* @stable ICU 3.0
*/
void setMaximumSignificantDigits(int32_t max);
/**
* Returns true if significant digits are in use, or false if
* integer and fraction digit counts are in use.
* @return true if significant digits are in use
* @stable ICU 3.0
*/
UBool areSignificantDigitsUsed() const;
/**
* Sets whether significant digits are in use, or integer and
* fraction digit counts are in use.
* @param useSignificantDigits true to use significant digits, or
* false to use integer and fraction digit counts
* @stable ICU 3.0
*/
void setSignificantDigitsUsed(UBool useSignificantDigits);
public:
/**
* 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 through the application of a new pattern.
* @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);
/**
* Sets the currency used to display currency amounts. See
* setCurrency(const UChar*, UErrorCode&).
* @deprecated ICU 3.0. Use setCurrency(const UChar*, UErrorCode&).
*/
virtual void setCurrency(const UChar* theCurrency);
/**
* The resource tags we use to retrieve decimal format data from
* locale resource bundles.
* @deprecated ICU 3.4. This string has no public purpose. Please don't use it.
*/
static const char fgNumberPatterns[];
public:
/**
* Return the class ID for this class. This is useful only for
* comparing to a return value from getDynamicClassID(). For example:
*
* . Base* polymorphic_pointer = createPolymorphicObject();
* . if (polymorphic_pointer->getDynamicClassID() ==
* . Derived::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;
private:
friend UBool U_CALLCONV decimfmtAffixValueComparator(UHashTok val1, UHashTok val2);
friend UBool U_CALLCONV decimfmtAffixPatternValueComparator(UHashTok val1, UHashTok val2);
DecimalFormat(); // default constructor not implemented
int32_t precision(UBool isIntegral) const;
/**
* Do real work of constructing a new DecimalFormat.
*/
void construct(UErrorCode& status,
UParseError& parseErr,
const UnicodeString* pattern = 0,
DecimalFormatSymbols* symbolsToAdopt = 0
);
/**
* Does the real work of generating a pattern.
*
* @param result Output param which will receive the pattern.
* Previous contents are deleted.
* @param localized TRUE return localized pattern.
* @return A reference to 'result'.
*/
UnicodeString& toPattern(UnicodeString& result, UBool localized) const;
/**
* Does the real work of applying a pattern.
* @param pattern The pattern to be applied.
* @param localized If true, the pattern is localized; else false.
* @param parseError Struct to recieve information on position
* of error if an error is encountered
* @param status Output param set to success/failure code on
* exit. If the pattern is invalid, this will be
* set to a failure result.
*/
void applyPattern(const UnicodeString& pattern,
UBool localized,
UParseError& parseError,
UErrorCode& status);
/*
* similar to applyPattern, but without re-gen affix for currency
*/
void applyPatternInternally(const UnicodeString& pluralCount,
const UnicodeString& pattern,
UBool localized,
UParseError& parseError,
UErrorCode& status);
/*
* only apply pattern without expand affixes
*/
void applyPatternWithoutExpandAffix(const UnicodeString& pattern,
UBool localized,
UParseError& parseError,
UErrorCode& status);
/*
* expand affixes (after apply patter) and re-compute fFormatWidth
*/
void expandAffixAdjustWidth(const UnicodeString* pluralCount);
/**
* Do the work of formatting a number, either a double or a long.
*
* @param appendTo Output parameter to receive result.
* Result is appended to existing contents.
* @param fieldPosition On input: an alignment field, if desired.
* On output: the offsets of the alignment field.
* @param digits the digits to be formatted.
* @param isInteger if TRUE format the digits as Integer.
* @return Reference to 'appendTo' parameter.
*/
UnicodeString& subformat(UnicodeString& appendTo,
FieldPosition& fieldPosition,
DigitList& digits,
UBool isInteger) const;
void parse(const UnicodeString& text,
Formattable& result,
ParsePosition& pos,
UBool parseCurrency) const;
enum {
fgStatusInfinite,
fgStatusLength // Leave last in list.
} StatusFlags;
UBool subparse(const UnicodeString& text,
const UnicodeString* negPrefix,
const UnicodeString* negSuffix,
const UnicodeString* posPrefix,
const UnicodeString* posSuffix,
UBool currencyParsing,
int8_t type,
ParsePosition& parsePosition,
DigitList& digits, UBool* status,
UChar* currency) const;
// Mixed style parsing for currency.
// It parses against the current currency pattern
// using complex affix comparison
// parses against the currency plural patterns using complex affix comparison,
// and parses against the current pattern using simple affix comparison.
UBool parseForCurrency(const UnicodeString& text,
ParsePosition& parsePosition,
DigitList& digits,
UBool* status,
UChar* currency) const;
int32_t skipPadding(const UnicodeString& text, int32_t position) const;
int32_t compareAffix(const UnicodeString& input,
int32_t pos,
UBool isNegative,
UBool isPrefix,
const UnicodeString* affixPat,
UBool currencyParsing,
int8_t type,
UChar* currency) const;
static int32_t compareSimpleAffix(const UnicodeString& affix,
const UnicodeString& input,
int32_t pos);
static int32_t skipRuleWhiteSpace(const UnicodeString& text, int32_t pos);
static int32_t skipUWhiteSpace(const UnicodeString& text, int32_t pos);
int32_t compareComplexAffix(const UnicodeString& affixPat,
const UnicodeString& input,
int32_t pos,
int8_t type,
UChar* currency) const;
static int32_t match(const UnicodeString& text, int32_t pos, UChar32 ch);
static int32_t match(const UnicodeString& text, int32_t pos, const UnicodeString& str);
/**
* Get a decimal format symbol.
* Returns a const reference to the symbol string.
* @internal
*/
inline const UnicodeString &getConstSymbol(DecimalFormatSymbols::ENumberFormatSymbol symbol) const;
int32_t appendAffix(UnicodeString& buf, double number,
UBool isNegative, UBool isPrefix) const;
/**
* Append an affix to the given UnicodeString, using quotes if
* there are special characters. Single quotes themselves must be
* escaped in either case.
*/
void appendAffixPattern(UnicodeString& appendTo, const UnicodeString& affix,
UBool localized) const;
void appendAffixPattern(UnicodeString& appendTo,
const UnicodeString* affixPattern,
const UnicodeString& expAffix, UBool localized) const;
void expandAffix(const UnicodeString& pattern,
UnicodeString& affix,
double number,
UBool doFormat,
const UnicodeString* pluralCount) const;
void expandAffixes(const UnicodeString* pluralCount);
static double round(double a, ERoundingMode mode, UBool isNegative);
void addPadding(UnicodeString& appendTo,
FieldPosition& fieldPosition,
int32_t prefixLen, int32_t suffixLen) const;
UBool isGroupingPosition(int32_t pos) const;
void setCurrencyForSymbols();
// similar to setCurrency without re-compute the affixes for currency.
// If currency changes, the affix pattern for currency is not changed,
// but the affix will be changed. So, affixes need to be
// re-computed in setCurrency(), but not in setCurrencyInternally().
virtual void setCurrencyInternally(const UChar* theCurrency, UErrorCode& ec);
// set up currency affix patterns for mix parsing.
// The patterns saved here are the affix patterns of default currency
// pattern and the unique affix patterns of the plural currency patterns.
// Those patterns are used by parseForCurrency().
void setupCurrencyAffixPatterns(UErrorCode& status);
// set up the currency affixes used in currency plural formatting.
// It sets up both fAffixesForCurrency for currency pattern if the current
// pattern contains 3 currency signs,
// and it sets up fPluralAffixesForCurrency for currency plural patterns.
void setupCurrencyAffixes(const UnicodeString& pattern,
UBool setupForCurrentPattern,
UBool setupForPluralPattern,
UErrorCode& status);
// hashtable operations
Hashtable* initHashForAffixPattern(UErrorCode& status);
Hashtable* initHashForAffix(UErrorCode& status);
void deleteHashForAffixPattern();
void deleteHashForAffix(Hashtable*& table);
void copyHashForAffixPattern(const Hashtable* source,
Hashtable* target, UErrorCode& status);
void copyHashForAffix(const Hashtable* source,
Hashtable* target, UErrorCode& status);
// currency sign count
enum {
fgCurrencySignCountZero,
fgCurrencySignCountInSymbolFormat,
fgCurrencySignCountInISOFormat,
fgCurrencySignCountInPluralFormat
} CurrencySignCount;
/**
* Constants.
*/
//static const int8_t fgMaxDigit; // The largest digit, in this case 9
/*transient*/ //DigitList* fDigitList;
UnicodeString fPositivePrefix;
UnicodeString fPositiveSuffix;
UnicodeString fNegativePrefix;
UnicodeString fNegativeSuffix;
UnicodeString* fPosPrefixPattern;
UnicodeString* fPosSuffixPattern;
UnicodeString* fNegPrefixPattern;
UnicodeString* fNegSuffixPattern;
/**
* Formatter for ChoiceFormat-based currency names. If this field
* is not null, then delegate to it to format currency symbols.
* @since ICU 2.6
*/
ChoiceFormat* fCurrencyChoice;
int32_t fMultiplier;
int32_t fGroupingSize;
int32_t fGroupingSize2;
UBool fDecimalSeparatorAlwaysShown;
DecimalFormatSymbols* fSymbols;
UBool fUseSignificantDigits;
int32_t fMinSignificantDigits;
int32_t fMaxSignificantDigits;
UBool fUseExponentialNotation;
int8_t fMinExponentDigits;
UBool fExponentSignAlwaysShown;
/* If fRoundingIncrement is NULL, there is no rounding. Otherwise, round to
* fRoundingIncrement.getDouble(). Since this operation may be expensive,
* we cache the result in fRoundingDouble. All methods that update
* fRoundingIncrement also update fRoundingDouble. */
DigitList* fRoundingIncrement;
/*transient*/ double fRoundingDouble;
ERoundingMode fRoundingMode;
UChar32 fPad;
int32_t fFormatWidth;
EPadPosition fPadPosition;
/*
* Following are used for currency format
*/
// pattern used in this formatter
UnicodeString fFormatPattern;
// style is only valid when decimal formatter is constructed by
// DecimalFormat(pattern, decimalFormatSymbol, style)
int fStyle;
/*
* Represents whether this is a currency format, and which
* currency format style.
* 0: not currency format type;
* 1: currency style -- symbol name, such as "$" for US dollar.
* 2: currency style -- ISO name, such as USD for US dollar.
* 3: currency style -- plural long name, such as "US Dollar" for
* "1.00 US Dollar", or "US Dollars" for
* "3.00 US Dollars".
*/
int fCurrencySignCount;
/* For currency parsing purose,
* Need to remember all prefix patterns and suffix patterns of
* every currency format pattern,
* including the pattern of default currecny style
* and plural currency style. And the patterns are set through applyPattern.
*/
// TODO: innerclass?
struct AffixPatternsForCurrency : public UMemory {
// negative prefix pattern
UnicodeString negPrefixPatternForCurrency;
// negative suffix pattern
UnicodeString negSuffixPatternForCurrency;
// positive prefix pattern
UnicodeString posPrefixPatternForCurrency;
// positive suffix pattern
UnicodeString posSuffixPatternForCurrency;
int8_t patternType;
AffixPatternsForCurrency(const UnicodeString& negPrefix,
const UnicodeString& negSuffix,
const UnicodeString& posPrefix,
const UnicodeString& posSuffix,
int8_t type) {
negPrefixPatternForCurrency = negPrefix;
negSuffixPatternForCurrency = negSuffix;
posPrefixPatternForCurrency = posPrefix;
posSuffixPatternForCurrency = posSuffix;
patternType = type;
}
};
/* affix for currency formatting when the currency sign in the pattern
* equals to 3, such as the pattern contains 3 currency sign or
* the formatter style is currency plural format style.
*/
struct AffixesForCurrency : public UMemory {
// negative prefix
UnicodeString negPrefixForCurrency;
// negative suffix
UnicodeString negSuffixForCurrency;
// positive prefix
UnicodeString posPrefixForCurrency;
// positive suffix
UnicodeString posSuffixForCurrency;
int32_t formatWidth;
AffixesForCurrency(const UnicodeString& negPrefix,
const UnicodeString& negSuffix,
const UnicodeString& posPrefix,
const UnicodeString& posSuffix) {
negPrefixForCurrency = negPrefix;
negSuffixForCurrency = negSuffix;
posPrefixForCurrency = posPrefix;
posSuffixForCurrency = posSuffix;
}
};
// Affix pattern set for currency.
// It is a set of AffixPatternsForCurrency,
// each element of the set saves the negative prefix pattern,
// negative suffix pattern, positive prefix pattern,
// and positive suffix pattern of a pattern.
// It is used for currency mixed style parsing.
// It is actually is a set.
// The set contains the default currency pattern from the locale,
// and the currency plural patterns.
// Since it is a set, it does not contain duplicated items.
// For example, if 2 currency plural patterns are the same, only one pattern
// is included in the set. When parsing, we do not check whether the plural
// count match or not.
Hashtable* fAffixPatternsForCurrency;
// Following 2 are affixes for currency.
// It is a hash map from plural count to AffixesForCurrency.
// AffixesForCurrency saves the negative prefix,
// negative suffix, positive prefix, and positive suffix of a pattern.
// It is used during currency formatting only when the currency sign count
// is 3. In which case, the affixes are getting from here, not
// from the fNegativePrefix etc.
Hashtable* fAffixesForCurrency; // for current pattern
Hashtable* fPluralAffixesForCurrency; // for plural pattern
// Information needed for DecimalFormat to format/parse currency plural.
CurrencyPluralInfo* fCurrencyPluralInfo;
protected:
/**
* 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;
/** number of integer digits
* @stable ICU 2.4
*/
static const int32_t kDoubleIntegerDigits;
/** number of fraction digits
* @stable ICU 2.4
*/
static const int32_t kDoubleFractionDigits;
/**
* When someone turns on scientific mode, we assume that more than this
* number of digits is due to flipping from some other mode that didn't
* restrict the maximum, and so we force 1 integer digit. We don't bother
* to track and see if someone is using exponential notation with more than
* this number, it wouldn't make sense anyway, and this is just to make sure
* that someone turning on scientific mode with default settings doesn't
* end up with lots of zeroes.
* @stable ICU 2.8
*/
static const int32_t kMaxScientificIntegerDigits;
};
inline UnicodeString&
DecimalFormat::format(const Formattable& obj,
UnicodeString& appendTo,
UErrorCode& status) const {
// Don't use Format:: - use immediate base class only,
// in case immediate base modifies behavior later.
return NumberFormat::format(obj, appendTo, status);
}
inline UnicodeString&
DecimalFormat::format(double number,
UnicodeString& appendTo) const {
FieldPosition pos(0);
return format(number, appendTo, pos);
}
inline UnicodeString&
DecimalFormat::format(int32_t number,
UnicodeString& appendTo) const {
FieldPosition pos(0);
return format((int64_t)number, appendTo, pos);
}
inline const UnicodeString &
DecimalFormat::getConstSymbol(DecimalFormatSymbols::ENumberFormatSymbol symbol) const {
return fSymbols->getConstSymbol(symbol);
}
U_NAMESPACE_END
#endif /* #if !UCONFIG_NO_FORMATTING */
#endif // _DECIMFMT
//eof