// © 2016 and later: Unicode, Inc. and others. // License & terms of use: http://www.unicode.org/copyright.html /* ******************************************************************************** * Copyright (C) 1997-2016, International Business Machines * Corporation and others. All Rights Reserved. ******************************************************************************** * * File DECIMFMT.H * * Modification History: * * Date Name Description * 02/19/97 aliu Converted from java. * 03/20/97 clhuang Updated per C++ implementation. * 04/03/97 aliu Rewrote parsing and formatting completely, and * cleaned up and debugged. Actually works now. * 04/17/97 aliu Changed DigitCount to int per code review. * 07/10/97 helena Made ParsePosition a class and get rid of the function * hiding problems. * 09/09/97 aliu Ported over support for exponential formats. * 07/20/98 stephen Changed documentation * 01/30/13 emmons Added Scaling methods ******************************************************************************** */ #ifndef DECIMFMT_H #define DECIMFMT_H #include "unicode/utypes.h" /** * \file * \brief C++ API: Formats decimal numbers. */ #if !UCONFIG_NO_FORMATTING #include "unicode/dcfmtsym.h" #include "unicode/numfmt.h" #include "unicode/locid.h" #include "unicode/fpositer.h" #include "unicode/stringpiece.h" #include "unicode/curramt.h" #include "unicode/enumset.h" #ifndef U_HIDE_INTERNAL_API /** * \def UNUM_DECIMALFORMAT_INTERNAL_SIZE * @internal */ #if UCONFIG_FORMAT_FASTPATHS_49 #define UNUM_DECIMALFORMAT_INTERNAL_SIZE 16 #endif #endif /* U_HIDE_INTERNAL_API */ U_NAMESPACE_BEGIN class DigitList; class CurrencyPluralInfo; class Hashtable; class UnicodeSet; class FieldPositionHandler; class DecimalFormatStaticSets; class FixedDecimal; class DecimalFormatImpl; class PluralRules; class VisibleDigitsWithExponent; // explicit template instantiation. see digitlst.h #if defined (_MSC_VER) template class U_I18N_API EnumSet; #endif /** * DecimalFormat is a concrete subclass of NumberFormat that formats decimal * numbers. It has a variety of features designed to make it possible to parse * and format numbers in any locale, including support for Western, Arabic, or * Indic digits. It also supports different flavors of numbers, including * integers ("123"), fixed-point numbers ("123.4"), scientific notation * ("1.23E4"), percentages ("12%"), and currency amounts ("$123", "USD123", * "123 US dollars"). All of these flavors can be easily localized. * *

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: * *

* *

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 if in lenient mode; * otherwise, if present, they must be in appropriate positions. * *

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". * *

* * Significant Digits * * 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 *
* * * *

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". * *

* *

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. * *

In the absense of an explicit rounding increment numbers are * rounded to their formatted width. * *

* *

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: /** * 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); #ifndef U_HIDE_INTERNAL_API /** * 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 * @param status Output param set to success/failure code. If the * pattern is invalid this will be set to a failure code. * @internal */ DecimalFormat( const UnicodeString& pattern, DecimalFormatSymbols* symbolsToAdopt, UNumberFormatStyle style, UErrorCode& status); #if UCONFIG_HAVE_PARSEALLINPUT /** * @internal */ void setParseAllInput(UNumberFormatAttributeValue value); #endif #endif /* U_HIDE_INTERNAL_API */ /** * Set an integer attribute on this DecimalFormat. * May return U_UNSUPPORTED_ERROR if this instance does not support * the specified attribute. * @param attr the attribute to set * @param newvalue new value * @param status the error type * @return *this - for chaining (example: format.setAttribute(...).setAttribute(...) ) * @stable ICU 51 */ virtual DecimalFormat& setAttribute( UNumberFormatAttribute attr, int32_t newvalue, UErrorCode &status); /** * Get an integer * May return U_UNSUPPORTED_ERROR if this instance does not support * the specified attribute. * @param attr the attribute to set * @param status the error type * @return the attribute value. Undefined if there is an error. * @stable ICU 51 */ virtual int32_t getAttribute( UNumberFormatAttribute attr, UErrorCode &status) 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 53 */ virtual void setGroupingUsed(UBool newValue); /** * 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 53 */ virtual void setParseIntegerOnly(UBool value); /** * Set a particular UDisplayContext value in the formatter, such as * UDISPCTX_CAPITALIZATION_FOR_STANDALONE. * @param value The UDisplayContext value to set. * @param status Input/output status. If at entry this indicates a failure * status, the function will do nothing; otherwise this will be * updated with any new status from the function. * @stable ICU 53 */ virtual void setContext(UDisplayContext value, 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; using NumberFormat::format; /** * 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 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. * @param status * @return Reference to 'appendTo' parameter. * @internal */ virtual UnicodeString& format(double number, UnicodeString& appendTo, FieldPosition& pos, UErrorCode &status) 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 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 ICU 4.4 */ virtual UnicodeString& format(double number, UnicodeString& appendTo, FieldPositionIterator* posIter, UErrorCode& status) 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 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. * @internal */ virtual UnicodeString& format(int32_t number, UnicodeString& appendTo, FieldPosition& pos, UErrorCode &status) 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 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 ICU 4.4 */ virtual UnicodeString& format(int32_t number, UnicodeString& appendTo, FieldPositionIterator* posIter, UErrorCode& status) 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 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. * @internal */ virtual UnicodeString& format(int64_t number, UnicodeString& appendTo, FieldPosition& pos, UErrorCode &status) 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 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 ICU 4.4 */ virtual UnicodeString& format(int64_t number, UnicodeString& appendTo, FieldPositionIterator* posIter, UErrorCode& status) const; /** * Format a decimal number. * 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. * @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 ICU 4.4 */ virtual UnicodeString& format(StringPiece 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. * * @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. * @param number The number * @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 VisibleDigitsWithExponent &number, UnicodeString& appendTo, FieldPosition& pos, UErrorCode& status) const; /** * Format a decimal number. * @param number The number * @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 VisibleDigitsWithExponent &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. * * @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; using NumberFormat::parse; /** * 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; /** * 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; /** * 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 * @stable 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. * @stable 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. * @stable 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 a custom rounding * increment is not in effect. * @see #setRoundingIncrement * @see #getRoundingMode * @see #setRoundingMode * @stable ICU 2.0 */ virtual double getRoundingIncrement(void) const; /** * Set the rounding increment. In the absence of a rounding increment, * numbers will be rounded to the number of digits displayed. * @param newValue A positive rounding increment, or 0.0 to * use the default rounding increment. * 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. * @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) const; /** * 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) const; /** * 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); #ifndef U_HIDE_INTERNAL_API /** * Returns the minimum number of grouping digits. * Grouping separators are output if there are at least this many * digits to the left of the first (rightmost) grouping separator, * that is, there are at least (minimum grouping + grouping size) integer digits. * (Subject to isGroupingUsed().) * * For example, if this value is 2, and the grouping size is 3, then * 9999 -> "9999" and 10000 -> "10,000" * * This is a technology preview. This API may change behavior or may be removed. * * The default value for this attribute is 0. * A value of 1, 0, or lower, means that the use of grouping separators * only depends on the grouping size (and on isGroupingUsed()). * Currently, the corresponding CLDR data is not used; this is likely to change. * * @see setMinimumGroupingDigits * @see getGroupingSize * @internal technology preview */ int32_t getMinimumGroupingDigits() const; #endif /* U_HIDE_INTERNAL_API */ /* Cannot use #ifndef U_HIDE_INTERNAL_API for the following draft method since it is virtual. */ /** * Sets the minimum grouping digits. Setting to a value less than or * equal to 1 turns off minimum grouping digits. * * @param newValue the new value of minimum grouping digits. * @see getMinimumGroupingDigits * @internal technology preview */ virtual void setMinimumGroupingDigits(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); /** * Allows you to get the parse behavior of the pattern decimal mark. * * @return TRUE if input must contain a match to decimal mark in pattern * @stable ICU 54 */ UBool isDecimalPatternMatchRequired(void) const; /** * Allows you to set the behavior of the pattern decimal mark. * * if TRUE, the input must have a decimal mark if one was specified in the pattern. When * FALSE the decimal mark may be omitted from the input. * * @param newValue set TRUE if input must contain a match to decimal mark in pattern * @stable ICU 54 */ virtual void setDecimalPatternMatchRequired(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 function also enables the use of significant digits * by this formatter - areSignificantDigitsUsed() will return TRUE. * @see #areSignificantDigitsUsed * @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 function also enables the use of significant digits * by this formatter - areSignificantDigitsUsed() will return TRUE. * @see #areSignificantDigitsUsed * @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 char16_t* theCurrency, UErrorCode& ec); /** * Sets the currency used to display currency amounts. See * setCurrency(const char16_t*, UErrorCode&). * @deprecated ICU 3.0. Use setCurrency(const char16_t*, UErrorCode&). */ virtual void setCurrency(const char16_t* theCurrency); /** * Sets the Currency Context object used to display currency. * This takes effect immediately, if this format is a * currency format. * @param currencyContext new currency context object to use. * @stable ICU 54 */ void setCurrencyUsage(UCurrencyUsage newUsage, UErrorCode* ec); /** * Returns the Currency Context object used to display currency * @stable ICU 54 */ UCurrencyUsage getCurrencyUsage() const; /** * 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[]; #ifndef U_HIDE_INTERNAL_API /** * Get a FixedDecimal corresponding to a double as it would be * formatted by this DecimalFormat. * Internal, not intended for public use. * @internal */ FixedDecimal getFixedDecimal(double number, UErrorCode &status) const; /** * Get a FixedDecimal corresponding to a formattable as it would be * formatted by this DecimalFormat. * Internal, not intended for public use. * @internal */ FixedDecimal getFixedDecimal(const Formattable &number, UErrorCode &status) const; /** * Get a FixedDecimal corresponding to a DigitList as it would be * formatted by this DecimalFormat. Note: the DigitList may be modified. * Internal, not intended for public use. * @internal */ FixedDecimal getFixedDecimal(DigitList &number, UErrorCode &status) const; /** * Get a VisibleDigitsWithExponent corresponding to a double * as it would be formatted by this DecimalFormat. * Internal, not intended for public use. * @internal */ VisibleDigitsWithExponent &initVisibleDigitsWithExponent( double number, VisibleDigitsWithExponent &digits, UErrorCode &status) const; /** * Get a VisibleDigitsWithExponent corresponding to a formattable * as it would be formatted by this DecimalFormat. * Internal, not intended for public use. * @internal */ VisibleDigitsWithExponent &initVisibleDigitsWithExponent( const Formattable &number, VisibleDigitsWithExponent &digits, UErrorCode &status) const; /** * Get a VisibleDigitsWithExponent corresponding to a DigitList * as it would be formatted by this DecimalFormat. * Note: the DigitList may be modified. * Internal, not intended for public use. * @internal */ VisibleDigitsWithExponent &initVisibleDigitsWithExponent( DigitList &number, VisibleDigitsWithExponent &digits, UErrorCode &status) const; #endif /* U_HIDE_INTERNAL_API */ 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: DecimalFormat(); // default constructor not implemented /** * Initialize all fields of a new DecimalFormatter to a safe default value. * Common code for use by constructors. */ void init(); /** * Do real work of constructing a new DecimalFormat. */ void construct(UErrorCode& status, UParseError& parseErr, const UnicodeString* pattern = 0, DecimalFormatSymbols* symbolsToAdopt = 0 ); void handleCurrencySignInPattern(UErrorCode& status); void parse(const UnicodeString& text, Formattable& result, ParsePosition& pos, char16_t* currency) 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 complexCurrencyParsing, int8_t type, ParsePosition& parsePosition, DigitList& digits, UBool* status, char16_t* 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, char16_t* 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 complexCurrencyParsing, int8_t type, char16_t* currency) const; static UnicodeString& trimMarksFromAffix(const UnicodeString& affix, UnicodeString& trimmedAffix); UBool equalWithSignCompatibility(UChar32 lhs, UChar32 rhs) const; int32_t compareSimpleAffix(const UnicodeString& affix, const UnicodeString& input, int32_t pos, UBool lenient) const; static int32_t skipPatternWhiteSpace(const UnicodeString& text, int32_t pos); static int32_t skipUWhiteSpace(const UnicodeString& text, int32_t pos); static int32_t skipUWhiteSpaceAndMarks(const UnicodeString& text, int32_t pos); static int32_t skipBidiMarks(const UnicodeString& text, int32_t pos); int32_t compareComplexAffix(const UnicodeString& affixPat, const UnicodeString& input, int32_t pos, int8_t type, char16_t* 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); static UBool matchSymbol(const UnicodeString &text, int32_t position, int32_t length, const UnicodeString &symbol, UnicodeSet *sset, UChar32 schar); static UBool matchDecimal(UChar32 symbolChar, UBool sawDecimal, UChar32 sawDecimalChar, const UnicodeSet *sset, UChar32 schar); static UBool matchGrouping(UChar32 groupingChar, UBool sawGrouping, UChar32 sawGroupingChar, const UnicodeSet *sset, UChar32 decimalChar, const UnicodeSet *decimalSet, UChar32 schar); // 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); // get the currency rounding with respect to currency usage double getCurrencyRounding(const char16_t* currency, UErrorCode* ec) const; // get the currency fraction with respect to currency usage int getCurrencyFractionDigits(const char16_t* currency, UErrorCode* ec) const; // hashtable operations Hashtable* initHashForAffixPattern(UErrorCode& status); void deleteHashForAffixPattern(); void copyHashForAffixPattern(const Hashtable* source, Hashtable* target, UErrorCode& status); DecimalFormatImpl *fImpl; /** * Constants. */ EnumSet fBoolFlags; // style is only valid when decimal formatter is constructed by // DecimalFormat(pattern, decimalFormatSymbol, style) int fStyle; // 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; // Information needed for DecimalFormat to format/parse currency plural. CurrencyPluralInfo* fCurrencyPluralInfo; #if UCONFIG_HAVE_PARSEALLINPUT UNumberFormatAttributeValue fParseAllInput; #endif // Decimal Format Static Sets singleton. const DecimalFormatStaticSets *fStaticSets; protected: #ifndef U_HIDE_INTERNAL_API /** * Rounds a value according to the rules of this object. * @internal */ DigitList& _round(const DigitList& number, DigitList& adjustedNum, UBool& isNegative, UErrorCode& status) const; #endif /* U_HIDE_INTERNAL_API */ /** * 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(char16_t* 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; }; U_NAMESPACE_END #endif /* #if !UCONFIG_NO_FORMATTING */ #endif // _DECIMFMT //eof