987 lines
37 KiB
C++
987 lines
37 KiB
C++
/*
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********************************************************************************
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* *
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* COPYRIGHT: *
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* (C) Copyright Taligent, Inc., 1997 *
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* (C) Copyright International Business Machines Corporation, 1997-1999 *
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* Copyright (C) 1999 Alan Liu and others. All rights reserved. *
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* Licensed Material - Program-Property of IBM - All Rights Reserved. *
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* US Government Users Restricted Rights - Use, duplication, or disclosure *
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* restricted by GSA ADP Schedule Contract with IBM Corp. *
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* *
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********************************************************************************
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*
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* File DECIMFMT.H
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*
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* Modification History:
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*
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* Date Name Description
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* 02/19/97 aliu Converted from java.
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* 03/20/97 clhuang Updated per C++ implementation.
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* 04/03/97 aliu Rewrote parsing and formatting completely, and
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* cleaned up and debugged. Actually works now.
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* 04/17/97 aliu Changed DigitCount to int per code review.
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* 07/10/97 helena Made ParsePosition a class and get rid of the function
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* hiding problems.
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* 09/09/97 aliu Ported over support for exponential formats.
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* 07/20/98 stephen Changed documentation
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********************************************************************************
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*/
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#ifndef DECIMFMT_H
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#define DECIMFMT_H
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#include "utypes.h"
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#include "numfmt.h"
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#include "locid.h"
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class DecimalFormatSymbols;
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class DigitList;
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/**
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* Concrete class for formatting decimal numbers, allowing a variety
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* of parameters, and localization to Western, Arabic, or Indic numbers.
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* <P>
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* Normally, you get the proper NumberFormat for a specific locale
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* (including the default locale) using the NumberFormat factory methods,
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* rather than constructing a DecimalNumberFormat directly.
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* <P>
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* Either the prefixes or the suffixes must be different for the parse
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* to distinguish positive from negative. Parsing will be unreliable
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* if the digits, thousands or decimal separators are the same, or if
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* any of them occur in the prefixes or suffixes.
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* <P>
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* [Special cases:]
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* <P>
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* NaN is formatted as a single character, typically \\uFFFD.
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* <P>
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* +/-Infinity is formatted as a single character, typically \\u221E,
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* plus the positive and negative pre/suffixes.
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* <P>
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* Note: this class is designed for common users; for very large or small
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* numbers, use a format that can express exponential values.
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* <P>
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* [Example:]
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* <pre>
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* . // normally we would have a GUI with a menu for this
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* . int32_t locCount;
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* . const Locale* locales = NumberFormat::getAvailableLocales(locCount);
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* . if (locCount > 12) locCount = 12; //limit output
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* .
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* . double myNumber = -1234.56;
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* . UErrorCode success = U_ZERO_ERROR;
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* . NumberFormat* form; //= NumberFormat::createInstance(success);
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* .
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* . // just for fun, we print out a number with the locale number, currency
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* . // and percent format for each locale we can.
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* . UnicodeString countryName;
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* . UnicodeString displayName;
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* . UnicodeString str;
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* . UnicodeString pattern;
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* . Formattable fmtable;
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* . for (int32_t j = 0; j < 3; ++j) {
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* . cout << endl << "FORMAT " << j << endl;
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* . for (int32_t i = 0; i < locCount; ++i) {
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* . if (locales[i].getCountry(countryName).size() == 0) {
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* . // skip language-only
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* . continue;
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* . }
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* . switch (j) {
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* . default:
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* . form = NumberFormat::createInstance(locales[i], success ); break;
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* . case 1:
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* . form = NumberFormat::createCurrencyInstance(locales[i], success ); break;
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* . case 0:
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* . form = NumberFormat::createPercentInstance(locales[i], success ); break;
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* . }
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* . if (form) {
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* . str.remove();
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* . pattern = ((DecimalFormat*)form)->toPattern(pattern);
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* . cout << locales[i].getDisplayName(displayName) << ": " << pattern;
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* . cout << " -> " << form->format(myNumber,str) << endl;
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* . form->parse(form->format(myNumber,str), fmtable, success);
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* . //cout << " parsed: " << fmtable << endl;
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* . delete form;
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* . }
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* . }
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* . }
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* </pre>
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* [The following shows the structure of the pattern.]
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* <pre>
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* . pattern := subpattern{;subpattern}
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* . subpattern := {prefix}integer{.fraction}{suffix}
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* .
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* . prefix := '\\u0000'..'\\uFFFD' - specialCharacters
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* . suffix := '\\u0000'..'\\uFFFD' - specialCharacters
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* . integer := '#'* '0'* '0'
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* . fraction := '0'* '#'*
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*
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* Notation:
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* . X* 0 or more instances of X
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* . (X | Y) either X or Y.
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* . X..Y any character from X up to Y, inclusive.
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* . S - T characters in S, except those in T
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* </pre>
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* The first subpattern is for positive numbers. The second (optional)
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* subpattern is used for negative numbers. (In both cases, ',' can
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* occur inside the integer portion--it is just too messy to indicate
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* in BNF.) For the second subpattern, only the PREFIX and SUFFIX are
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* noted; other attributes are taken only from the first subpattern.
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* <P>
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* Here are the special characters used in the parts of the
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* subpattern, with notes on their usage.
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* <pre>
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* . Symbol Meaning
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* . 0 a digit, showing up a zero if it is zero
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* . # a digit, supressed if zero
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* . . placeholder for decimal separator
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* . , placeholder for grouping separator.
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* . E separates mantissa and exponent for exponential formats.
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* . ; separates formats.
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* . - default negative prefix.
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* . % multiply by 100 and show as percentage
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* . \u2030 multiply by 1000 and show as per mille
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* . \u00A4 currency sign; replaced by currency symbol; if
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* . doubled, replaced by international currency symbol.
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* . If present in a pattern, the monetary decimal separator
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* . is used instead of the decimal separator.
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* . X any other characters can be used in the prefix or suffix
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* . ' used to quote special characters in a prefix or suffix.
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* </pre>
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* [Notes]
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* <P>
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* If there is no explicit negative subpattern, - is prefixed to the
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* positive form. That is, "0.00" alone is equivalent to "0.00;-0.00".
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* <P>
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* Illegal formats, such as "#.#.#" in the same format, will cause a
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* failing UErrorCode to be returned.
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* <P>
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* The grouping separator is commonly used for thousands, but in some
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* countries for ten-thousands. The interval is a constant number of
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* digits between the grouping characters, such as 100,000,000 or 1,0000,0000.
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* If you supply a pattern with multiple grouping characters, the interval
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* between the last one and the end of the integer is the one that is
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* used. So "#,##,###,####" == "######,####" == "##,####,####".
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* <P>
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* This class only handles localized digits where the 10 digits are
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* contiguous in Unicode, from 0 to 9. Other digits sets (such as
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* superscripts) would need a different subclass.
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*/
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class U_I18N_API DecimalFormat: public NumberFormat {
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public:
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enum ERoundingMode {
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kRoundCeiling,
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kRoundFloor,
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kRoundDown,
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kRoundUp,
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kRoundHalfEven,
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kRoundHalfDown,
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kRoundHalfUp
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// We don't support ROUND_UNNECESSARY
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};
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enum EPadPosition {
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kPadBeforePrefix,
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kPadAfterPrefix,
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kPadBeforeSuffix,
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kPadAfterSuffix
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};
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/**
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* Create a DecimalFormat using the default pattern and symbols
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* for the default locale. This is a convenient way to obtain a
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* DecimalFormat when internationalization is not the main concern.
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* <P>
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* To obtain standard formats for a given locale, use the factory methods
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* on NumberFormat such as getNumberInstance. These factories will
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* return the most appropriate sub-class of NumberFormat for a given
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* locale.
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* @param status Output param set to success/failure code. If the
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* pattern is invalid this will be set to a failure code.
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*/
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DecimalFormat(UErrorCode& status);
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/**
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* Create a DecimalFormat from the given pattern and the symbols
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* for the default locale. This is a convenient way to obtain a
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* DecimalFormat when internationalization is not the main concern.
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* <P>
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* To obtain standard formats for a given locale, use the factory methods
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* on NumberFormat such as getNumberInstance. These factories will
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* return the most appropriate sub-class of NumberFormat for a given
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* locale.
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* @param pattern A non-localized pattern string.
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* @param status Output param set to success/failure code. If the
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* pattern is invalid this will be set to a failure code.
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*/
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DecimalFormat(const UnicodeString& pattern,
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UErrorCode& status);
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/**
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* Create a DecimalFormat from the given pattern and symbols.
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* Use this constructor when you need to completely customize the
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* behavior of the format.
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* <P>
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* To obtain standard formats for a given
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* locale, use the factory methods on NumberFormat such as
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* getInstance or getCurrencyInstance. If you need only minor adjustments
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* to a standard format, you can modify the format returned by
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* a NumberFormat factory method.
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*
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* @param pattern a non-localized pattern string
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* @param symbolsToAdopt the set of symbols to be used. The caller should not
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* delete this object after making this call.
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* @param status Output param set to success/failure code. If the
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* pattern is invalid this will be set to a failure code.
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*/
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DecimalFormat( const UnicodeString& pattern,
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DecimalFormatSymbols* symbolsToAdopt,
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UErrorCode& status);
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/**
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* Create a DecimalFormat from the given pattern and symbols.
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* Use this constructor when you need to completely customize the
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* behavior of the format.
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* <P>
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* To obtain standard formats for a given
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* locale, use the factory methods on NumberFormat such as
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* getInstance or getCurrencyInstance. If you need only minor adjustments
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* to a standard format, you can modify the format returned by
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* a NumberFormat factory method.
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*
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* @param pattern a non-localized pattern string
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* @param symbols the set of symbols to be used
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* @param status Output param set to success/failure code. If the
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* pattern is invalid this will be set to a failure code.
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*/
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DecimalFormat( const UnicodeString& pattern,
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const DecimalFormatSymbols& symbols,
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UErrorCode& status);
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/**
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* Copy constructor.
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*/
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DecimalFormat(const DecimalFormat& source);
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/**
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* Assignment operator.
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*/
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DecimalFormat& operator=(const DecimalFormat& rhs);
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/**
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* Destructor.
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*/
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virtual ~DecimalFormat();
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/**
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* Clone this Format object polymorphically. The caller owns the
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* result and should delete it when done.
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*/
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virtual Format* clone(void) const;
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/**
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* Return true if the given Format objects are semantically equal.
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* Objects of different subclasses are considered unequal.
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*/
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virtual bool_t operator==(const Format& other) const;
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/**
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* Format a double or long number using base-10 representation.
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*
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* @param number The value to be formatted.
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* @param toAppendTo The string to append the formatted string to.
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* This is an output parameter.
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* @param pos On input: an alignment field, if desired.
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* On output: the offsets of the alignment field.
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* @return A reference to 'toAppendTo'.
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*/
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virtual UnicodeString& format(double number,
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UnicodeString& toAppendTo,
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FieldPosition& pos) const;
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virtual UnicodeString& format(int32_t number,
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UnicodeString& toAppendTo,
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FieldPosition& pos) const;
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virtual UnicodeString& format(const Formattable& obj,
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UnicodeString& toAppendTo,
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FieldPosition& pos,
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UErrorCode& status) const;
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/**
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* Redeclared NumberFormat method.
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*/
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UnicodeString& format(const Formattable& obj,
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UnicodeString& result,
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UErrorCode& status) const;
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/**
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* Redeclared NumberFormat method.
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*/
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UnicodeString& format(double number,
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UnicodeString& output) const;
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/**
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* Redeclared NumberFormat method.
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*/
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UnicodeString& format(int32_t number,
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UnicodeString& output) const;
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/**
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* Parse the given string using this object's choices. The method
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* does string comparisons to try to find an optimal match.
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* If no object can be parsed, index is unchanged, and NULL is
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* returned.
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*
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* @param text The text to be parsed.
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* @param result Formattable to be set to the parse result.
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* If parse fails, return contents are undefined.
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* @param parsePosition The position to start parsing at on input.
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* On output, moved to after the last successfully
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* parse character. On parse failure, does not change.
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*/
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virtual void parse(const UnicodeString& text,
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Formattable& result,
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ParsePosition& parsePosition) const;
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// Declare here again to get rid of function hiding problems.
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virtual void parse(const UnicodeString& text,
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Formattable& result,
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UErrorCode& error) const;
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/**
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* Returns the decimal format symbols, which is generally not changed
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* by the programmer or user.
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* @return desired DecimalFormatSymbols
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* @see DecimalFormatSymbols
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*/
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virtual const DecimalFormatSymbols* getDecimalFormatSymbols(void) const;
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/**
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* Sets the decimal format symbols, which is generally not changed
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* by the programmer or user.
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* @param symbolsToAdopt DecimalFormatSymbols to be adopted.
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*/
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virtual void adoptDecimalFormatSymbols(DecimalFormatSymbols* symbolsToAdopt);
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/**
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* Sets the decimal format symbols, which is generally not changed
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* by the programmer or user.
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* @param symbols DecimalFormatSymbols.
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*/
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virtual void setDecimalFormatSymbols(const DecimalFormatSymbols& symbols);
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/**
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* Get the positive prefix.
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*
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* Examples: +123, $123, sFr123
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*/
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UnicodeString& getPositivePrefix(UnicodeString& result) const;
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/**
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* Set the positive prefix.
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*
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* Examples: +123, $123, sFr123
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*/
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virtual void setPositivePrefix(const UnicodeString& newValue);
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/**
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* Get the negative prefix.
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*
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* Examples: -123, ($123) (with negative suffix), sFr-123
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*/
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UnicodeString& getNegativePrefix(UnicodeString& result) const;
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/**
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* Set the negative prefix.
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*
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* Examples: -123, ($123) (with negative suffix), sFr-123
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*/
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virtual void setNegativePrefix(const UnicodeString& newValue);
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/**
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* Get the positive suffix.
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*
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* Example: 123%
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*/
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UnicodeString& getPositiveSuffix(UnicodeString& result) const;
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/**
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* Set the positive suffix.
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*
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* Example: 123%
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*/
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virtual void setPositiveSuffix(const UnicodeString& newValue);
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/**
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* Get the negative suffix.
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*
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* Examples: -123%, ($123) (with positive suffixes)
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*/
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UnicodeString& getNegativeSuffix(UnicodeString& result) const;
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/**
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* Set the positive suffix.
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*
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* Examples: 123%
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*/
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virtual void setNegativeSuffix(const UnicodeString& newValue);
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/**
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* Get the multiplier for use in percent, permill, etc.
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* For a percentage, set the suffixes to have "%" and the multiplier to be 100.
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* (For Arabic, use arabic percent symbol).
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* For a permill, set the suffixes to have "\u2031" and the multiplier to be 1000.
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*
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* Examples: with 100, 1.23 -> "123", and "123" -> 1.23
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*/
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int32_t getMultiplier(void) const;
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/**
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* Set the multiplier for use in percent, permill, etc.
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* For a percentage, set the suffixes to have "%" and the multiplier to be 100.
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* (For Arabic, use arabic percent symbol).
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* For a permill, set the suffixes to have "\u2031" and the multiplier to be 1000.
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*
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* Examples: with 100, 1.23 -> "123", and "123" -> 1.23
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*/
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virtual void setMultiplier(int32_t newValue);
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/**
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* Get the rounding increment.
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* @return A positive rounding increment, or 0.0 if rounding
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* is not in effect.
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* @see #setRoundingIncrement
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* @see #getRoundingMode
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* @see #setRoundingMode
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*/
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virtual double getRoundingIncrement(void);
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/**
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* Set the rounding increment. This method also controls whether
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* rounding is enabled.
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* @param newValue A positive rounding increment, or 0.0 to disable rounding.
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* Negative increments are equivalent to 0.0.
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* @see #getRoundingIncrement
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* @see #getRoundingMode
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* @see #setRoundingMode
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*/
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virtual void setRoundingIncrement(double newValue);
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/**
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* Get the rounding mode.
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* @return A rounding mode
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* @see #setRoundingIncrement
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* @see #getRoundingIncrement
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* @see #setRoundingMode
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*/
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virtual ERoundingMode getRoundingMode(void);
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/**
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* Set the rounding mode. This has no effect unless the rounding
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* increment is greater than zero.
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* @param roundingMode A rounding mode
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* @see #setRoundingIncrement
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* @see #getRoundingIncrement
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* @see #getRoundingMode
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*/
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virtual void setRoundingMode(ERoundingMode roundingMode);
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/**
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* Get the width to which the output of <code>format()</code> is padded.
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* @return the format width, or zero if no padding is in effect
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* @see #setFormatWidth
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* @see #getPadCharacter
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* @see #setPadCharacter
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* @see #getPadPosition
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* @see #setPadPosition
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*/
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virtual int32_t getFormatWidth(void);
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/**
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* Set the width to which the output of <code>format()</code> is padded.
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* This method also controls whether padding is enabled.
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* @param width the width to which to pad the result of
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* <code>format()</code>, or zero to disable padding. A negative
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* width is equivalent to 0.
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* @see #getFormatWidth
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* @see #getPadCharacter
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* @see #setPadCharacter
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* @see #getPadPosition
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* @see #setPadPosition
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*/
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virtual void setFormatWidth(int32_t width);
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/**
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* Get the character used to pad to the format width. The default is ' '.
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* @return the pad character
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* @see #setFormatWidth
|
|
* @see #getFormatWidth
|
|
* @see #setPadCharacter
|
|
* @see #getPadPosition
|
|
* @see #setPadPosition
|
|
*/
|
|
virtual UChar getPadCharacter(void);
|
|
|
|
/**
|
|
* Set the character used to pad to the format width. This has no effect
|
|
* unless padding is enabled.
|
|
* @param padChar the pad character
|
|
* @see #setFormatWidth
|
|
* @see #getFormatWidth
|
|
* @see #getPadCharacter
|
|
* @see #getPadPosition
|
|
* @see #setPadPosition
|
|
*/
|
|
virtual void setPadCharacter(UChar padChar);
|
|
|
|
/**
|
|
* Get the position at which padding will take place. This is the location
|
|
* at which padding will be inserted if the result of <code>format()</code>
|
|
* is shorter than the format width.
|
|
* @return the pad position, one of <code>kPadBeforePrefix</code>,
|
|
* <code>kPadAfterPrefix</code>, <code>kPadBeforeSuffix</code>, or
|
|
* <code>kPadAfterSuffix</code>.
|
|
* @see #setFormatWidth
|
|
* @see #getFormatWidth
|
|
* @see #setPadCharacter
|
|
* @see #getPadCharacter
|
|
* @see #setPadPosition
|
|
* @see #kPadBeforePrefix
|
|
* @see #kPadAfterPrefix
|
|
* @see #kPadBeforeSuffix
|
|
* @see #kPadAfterSuffix
|
|
*/
|
|
virtual EPadPosition getPadPosition(void);
|
|
|
|
/**
|
|
* <strong><font face=helvetica color=red>NEW</font></strong>
|
|
* Set the position at which padding will take place. This is the location
|
|
* at which padding will be inserted if the result of <code>format()</code>
|
|
* is shorter than the format width. This has no effect unless padding is
|
|
* enabled.
|
|
* @param padPos the pad position, one of <code>kPadBeforePrefix</code>,
|
|
* <code>kPadAfterPrefix</code>, <code>kPadBeforeSuffix</code>, or
|
|
* <code>kPadAfterSuffix</code>.
|
|
* @see #setFormatWidth
|
|
* @see #getFormatWidth
|
|
* @see #setPadCharacter
|
|
* @see #getPadCharacter
|
|
* @see #getPadPosition
|
|
* @see #kPadBeforePrefix
|
|
* @see #kPadAfterPrefix
|
|
* @see #kPadBeforeSuffix
|
|
* @see #kPadAfterSuffix
|
|
*/
|
|
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
|
|
*/
|
|
virtual bool_t isScientificNotation(void);
|
|
|
|
/**
|
|
* Set whether or not scientific notation is used.
|
|
* @param useScientific TRUE if this object formats and parses scientific
|
|
* notation
|
|
* @see #isScientificNotation
|
|
* @see #getMinimumExponentDigits
|
|
* @see #setMinimumExponentDigits
|
|
* @see #isExponentSignAlwaysShown
|
|
* @see #setExponentSignAlwaysShown
|
|
*/
|
|
virtual void setScientificNotation(bool_t 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
|
|
*/
|
|
virtual int8_t getMinimumExponentDigits(void);
|
|
|
|
/**
|
|
* 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
|
|
*/
|
|
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
|
|
*/
|
|
virtual bool_t 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
|
|
*/
|
|
virtual void setExponentSignAlwaysShown(bool_t 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.
|
|
* @see setGroupingSize
|
|
* @see NumberFormat::isGroupingUsed
|
|
* @see DecimalFormatSymbols::getGroupingSeparator
|
|
*/
|
|
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.
|
|
* @see getGroupingSize
|
|
* @see NumberFormat::setGroupingUsed
|
|
* @see DecimalFormatSymbols::setGroupingSeparator
|
|
*/
|
|
virtual void setGroupingSize(int32_t newValue);
|
|
|
|
/**
|
|
* Allows you to get the behavior of the decimal separator with integers.
|
|
* (The decimal separator will always appear with decimals.)
|
|
*
|
|
* Example: Decimal ON: 12345 -> 12345.; OFF: 12345 -> 12345
|
|
*/
|
|
bool_t isDecimalSeparatorAlwaysShown(void) const;
|
|
|
|
/**
|
|
* Allows you to set the behavior of the decimal separator with integers.
|
|
* (The decimal separator will always appear with decimals.)
|
|
*
|
|
* Example: Decimal ON: 12345 -> 12345.; OFF: 12345 -> 12345
|
|
*/
|
|
virtual void setDecimalSeparatorAlwaysShown(bool_t newValue);
|
|
|
|
/**
|
|
* Synthesizes a pattern string that represents the current state
|
|
* of this Format object.
|
|
* @see applyPattern
|
|
*/
|
|
virtual UnicodeString& toPattern(UnicodeString& result) const;
|
|
|
|
/**
|
|
* Synthesizes a localized pattern string that represents the current
|
|
* state of this Format object.
|
|
*
|
|
* @see applyPattern
|
|
*/
|
|
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.
|
|
* <P>
|
|
* 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
|
|
* <pre>
|
|
* . Example "#,#00.0#" -> 1,234.56
|
|
* </pre>
|
|
* This means a minimum of 2 integer digits, 1 fraction digit, and
|
|
* a maximum of 2 fraction digits.
|
|
* <pre>
|
|
* . Example: "#,#00.0#;(#,#00.0#)" for negatives in parantheses.
|
|
* </pre>
|
|
* 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 status Output param set to success/failure code on
|
|
* exit. If the pattern is invalid, this will be
|
|
* set to a failure result.
|
|
*/
|
|
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.
|
|
* <P>
|
|
* 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
|
|
* <pre>
|
|
* . Example "#,#00.0#" -> 1,234.56
|
|
* </pre>
|
|
* 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 status Output param set to success/failure code on
|
|
* exit. If the pattern is invalid, this will be
|
|
* set to a failure result.
|
|
*/
|
|
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.
|
|
* @see NumberFormat#setMaximumIntegerDigits
|
|
*/
|
|
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.
|
|
* @see NumberFormat#setMinimumIntegerDigits
|
|
*/
|
|
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.
|
|
* @see NumberFormat#setMaximumFractionDigits
|
|
*/
|
|
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.
|
|
* @see NumberFormat#setMinimumFractionDigits
|
|
*/
|
|
virtual void setMinimumFractionDigits(int32_t newValue);
|
|
|
|
/**
|
|
* The resource tags we use to retrieve decimal format data from
|
|
* locale resource bundles.
|
|
*/
|
|
static const UnicodeString fgNumberPatterns;
|
|
|
|
public:
|
|
|
|
/**
|
|
* Return the class ID for this class. This is useful only for
|
|
* comparing to a return value from getDynamicClassID(). For example:
|
|
* <pre>
|
|
* . Base* polymorphic_pointer = createPolymorphicObject();
|
|
* . if (polymorphic_pointer->getDynamicClassID() ==
|
|
* . Derived::getStaticClassID()) ...
|
|
* </pre>
|
|
* @return The class ID for all objects of this class.
|
|
*/
|
|
static UClassID getStaticClassID(void) { return (UClassID)&fgClassID; }
|
|
|
|
/**
|
|
* 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.
|
|
*/
|
|
virtual UClassID getDynamicClassID(void) const { return getStaticClassID(); }
|
|
|
|
private:
|
|
static char fgClassID;
|
|
|
|
/**
|
|
* Do real work of constructing a new DecimalFormat.
|
|
*/
|
|
void construct(UErrorCode& status,
|
|
const UnicodeString* pattern = 0,
|
|
DecimalFormatSymbols* symbolsToAdopt = 0,
|
|
const Locale& locale = Locale::getDefault());
|
|
|
|
/**
|
|
* Does the real work of generating a pattern.
|
|
*/
|
|
UnicodeString& toPattern(UnicodeString& result, bool_t 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 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,
|
|
bool_t localized,
|
|
UErrorCode& status);
|
|
|
|
/**
|
|
* Do the work of formatting a number, either a double or a long.
|
|
*/
|
|
UnicodeString& subformat(UnicodeString& result,
|
|
FieldPosition& fieldPosition,
|
|
bool_t isNegative,
|
|
bool_t isInteger) const;
|
|
|
|
static const int32_t fgStatusInfinite;
|
|
static const int32_t fgStatusPositive;
|
|
static const int32_t fgStatusLength;
|
|
|
|
/**
|
|
* Parse the given text into a number. The text is parsed beginning at
|
|
* parsePosition, until an unparseable character is seen.
|
|
* @param text The string to parse.
|
|
* @param parsePosition The position at which to being parsing. Upon
|
|
* return, the first unparseable character.
|
|
* @param digits The DigitList to set to the parsed value.
|
|
* @param isExponent If true, parse an exponent. This means no
|
|
* infinite values and integer only.
|
|
* @param status Upon return contains boolean status flags indicating
|
|
* whether the value was infinite and whether it was positive.
|
|
*/
|
|
bool_t subparse(const UnicodeString& text, ParsePosition& parsePosition,
|
|
DigitList& digits, bool_t isExponent,
|
|
bool_t* status) const;
|
|
|
|
/**
|
|
* Append an affix to the given StringBuffer, using quotes if
|
|
* there are special characters. Single quotes themselves must be
|
|
* escaped in either case.
|
|
*/
|
|
void appendAffix(UnicodeString& buffer, const UnicodeString& affix,
|
|
bool_t localized) const;
|
|
|
|
void appendAffix(UnicodeString& buffer,
|
|
const UnicodeString* affixPattern,
|
|
const UnicodeString& expAffix, bool_t localized) const;
|
|
|
|
void expandAffix(const UnicodeString& pattern,
|
|
UnicodeString& affix) const;
|
|
|
|
void expandAffixes();
|
|
|
|
static double round(double a, ERoundingMode mode, bool_t isNegative);
|
|
|
|
void addPadding(UnicodeString& result, bool_t hasAffixes,
|
|
bool_t isNegative) const;
|
|
|
|
/**
|
|
* 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;
|
|
int32_t fMultiplier;
|
|
int32_t fGroupingSize;
|
|
bool_t fDecimalSeparatorAlwaysShown;
|
|
/*transient*/ bool_t fIsCurrencyFormat;
|
|
DecimalFormatSymbols* fSymbols;
|
|
|
|
bool_t fUseExponentialNotation;
|
|
int8_t fMinExponentDigits;
|
|
bool_t 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;
|
|
|
|
UChar fPad;
|
|
int32_t fFormatWidth;
|
|
EPadPosition fPadPosition;
|
|
|
|
// Constants for characters used in programmatic (unlocalized) patterns.
|
|
static const UChar kPatternZeroDigit;
|
|
static const UChar kPatternGroupingSeparator;
|
|
static const UChar kPatternDecimalSeparator;
|
|
static const UChar kPatternPerMill;
|
|
static const UChar kPatternPercent;
|
|
static const UChar kPatternDigit;
|
|
static const UChar kPatternSeparator;
|
|
static const UChar kPatternExponent;
|
|
static const UChar kPatternPlus;
|
|
static const UChar kPatternMinus;
|
|
static const UChar kPatternPadEscape;
|
|
|
|
/**
|
|
* The CURRENCY_SIGN is the standard Unicode symbol for currency. It
|
|
* is used in patterns and substitued with either the currency symbol,
|
|
* or if it is doubled, with the international currency symbol. If the
|
|
* CURRENCY_SIGN is seen in a pattern, then the decimal separator is
|
|
* replaced with the monetary decimal separator.
|
|
*/
|
|
static const UChar kCurrencySign;
|
|
static const UChar kQuote;
|
|
|
|
protected:
|
|
static const int32_t kDoubleIntegerDigits;
|
|
static const int32_t kDoubleFractionDigits;
|
|
};
|
|
|
|
inline UnicodeString&
|
|
DecimalFormat::format(const Formattable& obj,
|
|
UnicodeString& result,
|
|
UErrorCode& status) const {
|
|
// Don't use Format:: - use immediate base class only,
|
|
// in case immediate base modifies behavior later.
|
|
return NumberFormat::format(obj, result, status);
|
|
}
|
|
|
|
inline UnicodeString&
|
|
DecimalFormat::format(double number,
|
|
UnicodeString& output) const {
|
|
return NumberFormat::format(number, output);
|
|
}
|
|
|
|
inline UnicodeString&
|
|
DecimalFormat::format(int32_t number,
|
|
UnicodeString& output) const {
|
|
return NumberFormat::format(number, output);
|
|
}
|
|
|
|
#endif // _DECIMFMT
|
|
//eof
|