/*
********************************************************************************
-* Copyright (C) 1997-2003, International Business Machines
+* Copyright (C) 1997-2009, International Business Machines
* Corporation and others. All Rights Reserved.
********************************************************************************
*
#define DECIMFMT_H
#include "unicode/utypes.h"
-
+/**
+ * \file
+ * \brief C++ API: Formats decimal numbers.
+ */
+
#if !UCONFIG_NO_FORMATTING
#include "unicode/dcfmtsym.h"
class DigitList;
class ChoiceFormat;
+class UnicodeSet;
/**
- * Concrete class for formatting decimal numbers, allowing a variety
- * of parameters, and localization to Western, Arabic, or Indic numbers.
- * <P>
- * Normally, you get the proper NumberFormat for a specific locale
- * (including the default locale) using the NumberFormat factory methods,
- * rather than constructing a DecimalNumberFormat directly.
- * <P>
- * Either the prefixes or the suffixes must be different for the parse
- * to distinguish positive from negative. Parsing will be unreliable
- * if the digits, thousands or decimal separators are the same, or if
- * any of them occur in the prefixes or suffixes.
- * <P>
- * [Special cases:]
- * <P>
- * NaN is formatted as a single character, typically \\uFFFD.
- * <P>
- * +/-Infinity is formatted as a single character, typically \\u221E,
- * plus the positive and negative pre/suffixes.
- * <P>
- * Note: this class is designed for common users; for very large or small
- * numbers, use a format that can express exponential values.
- * <P>
- * [Example:]
- * <pre>
+ * 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"). All of these
+ * flavors can be easily localized.
+ *
+ * <p>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.
+ *
+ * <p><strong>Example Usage</strong>
+ *
* \code
- * // normally we would have a GUI with a menu for this
+ * // Normally we would have a GUI with a menu for this
* int32_t locCount;
* const Locale* locales = NumberFormat::getAvailableLocales(locCount);
- * if (locCount > 12) locCount = 12; //limit output
*
* double myNumber = -1234.56;
* UErrorCode success = U_ZERO_ERROR;
- * NumberFormat* form; //= NumberFormat::createInstance(success);
+ * NumberFormat* form;
*
- * // just for fun, we print out a number with the locale number, currency
- * // and percent format for each locale we can.
+ * // Print out a number with the localized number, currency and percent
+ * // format for each locale.
* UnicodeString countryName;
* UnicodeString displayName;
* UnicodeString str;
* continue;
* }
* switch (j) {
- * default:
+ * case 0:
* form = NumberFormat::createInstance(locales[i], success ); break;
* case 1:
* form = NumberFormat::createCurrencyInstance(locales[i], success ); break;
- * case 0:
+ * default:
* form = NumberFormat::createPercentInstance(locales[i], success ); break;
* }
* if (form) {
* cout << locales[i].getDisplayName(displayName) << ": " << pattern;
* cout << " -> " << form->format(myNumber,str) << endl;
* form->parse(form->format(myNumber,str), fmtable, success);
- * //cout << " parsed: " << fmtable << endl;
* delete form;
* }
* }
* }
* \endcode
- * </pre>
- * [The following shows the structure of the pattern.]
- * <pre>
- * \code
- * pattern := subpattern{;subpattern}
- * subpattern := {prefix}integer{.fraction}{suffix}
- *
- * prefix := '\\u0000'..'\\uFFFD' - specialCharacters
- * suffix := '\\u0000'..'\\uFFFD' - specialCharacters
- * integer := '#'* '0'* '0'
- * fraction := '0'* '#'*
- *
- * Notation:
- * X* 0 or more instances of X
- * (X | Y) either X or Y.
- * X..Y any character from X up to Y, inclusive.
- * S - T characters in S, except those in T
- * \code
- * /pre>
- * The first subpattern is for positive numbers. The second (optional)
- * subpattern is used for negative numbers. (In both cases, ',' can
- * occur inside the integer portion--it is just too messy to indicate
- * in BNF.) For the second subpattern, only the PREFIX and SUFFIX are
- * noted; other attributes are taken only from the first subpattern.
- * <P>
- * Here are the special characters used in the parts of the
- * subpattern, with notes on their usage.
+ *
+ * <p><strong>Patterns</strong>
+ *
+ * <p>A DecimalFormat consists of a <em>pattern</em> and a set of
+ * <em>symbols</em>. 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.
+ *
+ * <p><strong>Special Pattern Characters</strong>
+ *
+ * <p>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.
+ *
+ * <p>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.
+ *
+ * <p>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.
+ *
+ * <table border=0 cellspacing=3 cellpadding=0>
+ * <tr bgcolor="#ccccff">
+ * <td align=left><strong>Symbol</strong>
+ * <td align=left><strong>Location</strong>
+ * <td align=left><strong>Localized?</strong>
+ * <td align=left><strong>Meaning</strong>
+ * <tr valign=top>
+ * <td><code>0</code>
+ * <td>Number
+ * <td>Yes
+ * <td>Digit
+ * <tr valign=top bgcolor="#eeeeff">
+ * <td><code>1-9</code>
+ * <td>Number
+ * <td>Yes
+ * <td>'1' through '9' indicate rounding.
+ * <tr valign=top>
+ * <td><code>\htmlonly@\endhtmlonly</code> <!--doxygen doesn't like @-->
+ * <td>Number
+ * <td>No
+ * <td>Significant digit
+ * <tr valign=top bgcolor="#eeeeff">
+ * <td><code>#</code>
+ * <td>Number
+ * <td>Yes
+ * <td>Digit, zero shows as absent
+ * <tr valign=top>
+ * <td><code>.</code>
+ * <td>Number
+ * <td>Yes
+ * <td>Decimal separator or monetary decimal separator
+ * <tr valign=top bgcolor="#eeeeff">
+ * <td><code>-</code>
+ * <td>Number
+ * <td>Yes
+ * <td>Minus sign
+ * <tr valign=top>
+ * <td><code>,</code>
+ * <td>Number
+ * <td>Yes
+ * <td>Grouping separator
+ * <tr valign=top bgcolor="#eeeeff">
+ * <td><code>E</code>
+ * <td>Number
+ * <td>Yes
+ * <td>Separates mantissa and exponent in scientific notation.
+ * <em>Need not be quoted in prefix or suffix.</em>
+ * <tr valign=top>
+ * <td><code>+</code>
+ * <td>Exponent
+ * <td>Yes
+ * <td>Prefix positive exponents with localized plus sign.
+ * <em>Need not be quoted in prefix or suffix.</em>
+ * <tr valign=top bgcolor="#eeeeff">
+ * <td><code>;</code>
+ * <td>Subpattern boundary
+ * <td>Yes
+ * <td>Separates positive and negative subpatterns
+ * <tr valign=top>
+ * <td><code>\%</code>
+ * <td>Prefix or suffix
+ * <td>Yes
+ * <td>Multiply by 100 and show as percentage
+ * <tr valign=top bgcolor="#eeeeff">
+ * <td><code>\\u2030</code>
+ * <td>Prefix or suffix
+ * <td>Yes
+ * <td>Multiply by 1000 and show as per mille
+ * <tr valign=top>
+ * <td><code>\htmlonly¤\endhtmlonly</code> (<code>\\u00A4</code>)
+ * <td>Prefix or suffix
+ * <td>No
+ * <td>Currency sign, replaced by currency symbol. If
+ * doubled, replaced by international currency symbol.
+ * If present in a pattern, the monetary decimal separator
+ * is used instead of the decimal separator.
+ * <tr valign=top bgcolor="#eeeeff">
+ * <td><code>'</code>
+ * <td>Prefix or suffix
+ * <td>No
+ * <td>Used to quote special characters in a prefix or suffix,
+ * for example, <code>"'#'#"</code> formats 123 to
+ * <code>"#123"</code>. To create a single quote
+ * itself, use two in a row: <code>"# o''clock"</code>.
+ * <tr valign=top>
+ * <td><code>*</code>
+ * <td>Prefix or suffix boundary
+ * <td>Yes
+ * <td>Pad escape, precedes pad character
+ * </table>
+ *
+ * <p>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#)".
+ *
+ * <p>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.
+ *
+ * <p>The <em>grouping separator</em> 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 <em>grouping
+ * size</em> 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
+ * <em>primary grouping size</em>, and one used for all others, the
+ * <em>secondary grouping size</em>. 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 "#,##,###,####" == "###,###,####" == "##,#,###,####".
+ *
+ * <p>Illegal patterns, such as "#.#.#" or "#.###,###", will cause
+ * DecimalFormat to set a failing UErrorCode.
+ *
+ * <p><strong>Pattern BNF</strong>
+ *
* <pre>
- * \code
- * Symbol Meaning
- * 0 a digit, showing up a zero if it is zero
- * # a digit, supressed if zero
- * . placeholder for decimal separator
- * , placeholder for grouping separator.
- * E separates mantissa and exponent for exponential formats.
- * ; separates formats.
- * - default negative prefix.
- * % multiply by 100 and show as percentage
- * \u2030 multiply by 1000 and show as per mille
- * \u00A4 currency sign; replaced by currency symbol; if
- * doubled, replaced by international currency symbol.
- * If present in a pattern, the monetary decimal separator
- * is used instead of the decimal separator.
- * X any other characters can be used in the prefix or suffix
- * ' used to quote special characters in a prefix or suffix.
- * \endcode
+ * 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
* </pre>
- * [Notes]
- * <P>
- * If there is no explicit negative subpattern, - is prefixed to the
- * positive form. That is, "0.00" alone is equivalent to "0.00;-0.00".
- * <P>
- * Illegal formats, such as "#.#.#" in the same format, will cause a
- * failing UErrorCode to be returned.
- * <P>
- * The grouping separator is commonly used for thousands, but in some
- * countries for ten-thousands. The interval is a constant number of
- * digits between the grouping characters, such as 100,000,000 or 1,0000,0000.
- * If you supply a pattern with multiple grouping characters, the interval
- * between the last one and the end of the integer determines the primary
- * grouping size, and the interval between the last two determines
- * the secondary grouping size (see below); all others are ignored.
- * So "#,##,###,####" == "###,###,####" == "##,#,###,####".
- * <P>
- * Some locales have two different grouping intervals: One used for the
- * least significant integer digits (the primary grouping size), and
- * one used for all others (the secondary grouping size). 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".
- * <P>
- * This class only handles localized digits where the 10 digits are
- * contiguous in Unicode, from 0 to 9. Other digits sets (such as
- * superscripts) would need a different subclass.
+ * The first subpattern is for positive numbers. The second (optional)
+ * subpattern is for negative numbers.
+ *
+ * <p>Not indicated in the BNF syntax above:
+ *
+ * <ul><li>The grouping separator ',' can occur inside the integer and
+ * sigDigits elements, between any two pattern characters of that
+ * element, as long as the integer or sigDigits element is not
+ * followed by the exponent element.
+ *
+ * <li>Two grouping intervals are recognized: That between the
+ * decimal point and the first grouping symbol, and that
+ * between the first and second grouping symbols. These
+ * intervals are identical in most locales, but in some
+ * locales they differ. For example, the pattern
+ * "#,##,###" formats the number 123456789 as
+ * "12,34,56,789".</li>
+ *
+ * <li>The pad specifier <code>padSpec</code> may appear before the prefix,
+ * after the prefix, before the suffix, after the suffix, or not at all.
+ *
+ * <li>In place of '0', the digits '1' through '9' may be used to
+ * indicate a rounding increment.
+ * </ul>
+ *
+ * <p><strong>Parsing</strong>
+ *
+ * <p>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.
+ *
+ * <p>During parsing, grouping separators are ignored.
+ *
+ * <p>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.
+ *
+ * <p><strong>Formatting</strong>
+ *
+ * <p>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 <a href="#sci">scientific
+ * notation</a> or <a href="#sigdig">significant digits</a>.
+ *
+ * <ul><li>If the number of actual integer digits exceeds the
+ * <em>maximum integer digits</em>, then only the least significant
+ * digits are shown. For example, 1997 is formatted as "97" if the
+ * maximum integer digits is set to 2.
+ *
+ * <li>If the number of actual integer digits is less than the
+ * <em>minimum integer digits</em>, then leading zeros are added. For
+ * example, 1997 is formatted as "01997" if the minimum integer digits
+ * is set to 5.
+ *
+ * <li>If the number of actual fraction digits exceeds the <em>maximum
+ * fraction digits</em>, then half-even rounding it performed to the
+ * maximum fraction digits. For example, 0.125 is formatted as "0.12"
+ * if the maximum fraction digits is 2. This behavior can be changed
+ * by specifying a rounding increment and a rounding mode.
+ *
+ * <li>If the number of actual fraction digits is less than the
+ * <em>minimum fraction digits</em>, then trailing zeros are added.
+ * For example, 0.125 is formatted as "0.1250" if the mimimum fraction
+ * digits is set to 4.
+ *
+ * <li>Trailing fractional zeros are not displayed if they occur
+ * <em>j</em> positions after the decimal, where <em>j</em> is less
+ * than the maximum fraction digits. For example, 0.10004 is
+ * formatted as "0.1" if the maximum fraction digits is four or less.
+ * </ul>
+ *
+ * <p><strong>Special Values</strong>
+ *
+ * <p><code>NaN</code> is represented as a single character, typically
+ * <code>\\uFFFD</code>. This character is determined by the
+ * DecimalFormatSymbols object. This is the only value for which
+ * the prefixes and suffixes are not used.
+ *
+ * <p>Infinity is represented as a single character, typically
+ * <code>\\u221E</code>, with the positive or negative prefixes and suffixes
+ * applied. The infinity character is determined by the
+ * DecimalFormatSymbols object.
+ *
+ * <a name="sci"><strong>Scientific Notation</strong></a>
+ *
+ * <p>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 10<sup>3</sup>. 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".
+ *
+ * <ul>
+ * <li>The number of digit characters after the exponent character gives the
+ * minimum exponent digit count. There is no maximum. Negative exponents are
+ * formatted using the localized minus sign, <em>not</em> the prefix and suffix
+ * from the pattern. This allows patterns such as "0.###E0 m/s". To prefix
+ * positive exponents with a localized plus sign, specify '+' between the
+ * exponent and the digits: "0.###E+0" will produce formats "1E+1", "1E+0",
+ * "1E-1", etc. (In localized patterns, use the localized plus sign rather than
+ * '+'.)
+ *
+ * <li>The minimum number of integer digits is achieved by adjusting the
+ * exponent. Example: 0.00123 formatted with "00.###E0" yields "12.3E-4". This
+ * only happens if there is no maximum number of integer digits. If there is a
+ * maximum, then the minimum number of integer digits is fixed at one.
+ *
+ * <li>The maximum number of integer digits, if present, specifies the exponent
+ * grouping. The most common use of this is to generate <em>engineering
+ * notation</em>, in which the exponent is a multiple of three, e.g.,
+ * "##0.###E0". The number 12345 is formatted using "##0.####E0" as "12.345E3".
+ *
+ * <li>When using scientific notation, the formatter controls the
+ * digit counts using significant digits logic. The maximum number of
+ * significant digits limits the total number of integer and fraction
+ * digits that will be shown in the mantissa; it does not affect
+ * parsing. For example, 12345 formatted with "##0.##E0" is "12.3E3".
+ * See the section on significant digits for more details.
+ *
+ * <li>The number of significant digits shown is determined as
+ * follows: If areSignificantDigitsUsed() returns false, then the
+ * minimum number of significant digits shown is one, and the maximum
+ * number of significant digits shown is the sum of the <em>minimum
+ * integer</em> and <em>maximum fraction</em> digits, and is
+ * unaffected by the maximum integer digits. If this sum is zero,
+ * then all significant digits are shown. If
+ * areSignificantDigitsUsed() returns true, then the significant digit
+ * counts are specified by getMinimumSignificantDigits() and
+ * getMaximumSignificantDigits(). In this case, the number of
+ * integer digits is fixed at one, and there is no exponent grouping.
+ *
+ * <li>Exponential patterns may not contain grouping separators.
+ * </ul>
+ *
+ * <a name="sigdig"><strong>Significant Digits</strong></a>
+ *
+ * <code>DecimalFormat</code> 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:
+ *
+ * <table border=0 cellspacing=3 cellpadding=0>
+ * <tr bgcolor="#ccccff">
+ * <td align=left>Pattern
+ * <td align=left>Minimum significant digits
+ * <td align=left>Maximum significant digits
+ * <td align=left>Number
+ * <td align=left>Output of format()
+ * <tr valign=top>
+ * <td><code>\@\@\@</code>
+ * <td>3
+ * <td>3
+ * <td>12345
+ * <td><code>12300</code>
+ * <tr valign=top bgcolor="#eeeeff">
+ * <td><code>\@\@\@</code>
+ * <td>3
+ * <td>3
+ * <td>0.12345
+ * <td><code>0.123</code>
+ * <tr valign=top>
+ * <td><code>\@\@##</code>
+ * <td>2
+ * <td>4
+ * <td>3.14159
+ * <td><code>3.142</code>
+ * <tr valign=top bgcolor="#eeeeff">
+ * <td><code>\@\@##</code>
+ * <td>2
+ * <td>4
+ * <td>1.23004
+ * <td><code>1.23</code>
+ * </table>
+ *
+ * <ul>
+ * <li>Significant digit counts may be expressed using patterns that
+ * specify a minimum and maximum number of significant digits. These
+ * are indicated by the <code>'@'</code> and <code>'#'</code>
+ * characters. The minimum number of significant digits is the number
+ * of <code>'@'</code> characters. The maximum number of significant
+ * digits is the number of <code>'@'</code> characters plus the number
+ * of <code>'#'</code> characters following on the right. For
+ * example, the pattern <code>"@@@"</code> indicates exactly 3
+ * significant digits. The pattern <code>"@##"</code> indicates from
+ * 1 to 3 significant digits. Trailing zero digits to the right of
+ * the decimal separator are suppressed after the minimum number of
+ * significant digits have been shown. For example, the pattern
+ * <code>"@##"</code> formats the number 0.1203 as
+ * <code>"0.12"</code>.
+ *
+ * <li>If a pattern uses significant digits, it may not contain a
+ * decimal separator, nor the <code>'0'</code> pattern character.
+ * Patterns such as <code>"@00"</code> or <code>"@.###"</code> are
+ * disallowed.
+ *
+ * <li>Any number of <code>'#'</code> characters may be prepended to
+ * the left of the leftmost <code>'@'</code> character. These have no
+ * effect on the minimum and maximum significant digits counts, but
+ * may be used to position grouping separators. For example,
+ * <code>"#,#@#"</code> indicates a minimum of one significant digits,
+ * a maximum of two significant digits, and a grouping size of three.
+ *
+ * <li>In order to enable significant digits formatting, use a pattern
+ * containing the <code>'@'</code> pattern character. Alternatively,
+ * call setSignificantDigitsUsed(TRUE).
+ *
+ * <li>In order to disable significant digits formatting, use a
+ * pattern that does not contain the <code>'@'</code> pattern
+ * character. Alternatively, call setSignificantDigitsUsed(FALSE).
+ *
+ * <li>The number of significant digits has no effect on parsing.
+ *
+ * <li>Significant digits may be used together with exponential notation. Such
+ * patterns are equivalent to a normal exponential pattern with a minimum and
+ * maximum integer digit count of one, a minimum fraction digit count of
+ * <code>getMinimumSignificantDigits() - 1</code>, and a maximum fraction digit
+ * count of <code>getMaximumSignificantDigits() - 1</code>. For example, the
+ * pattern <code>"@@###E0"</code> is equivalent to <code>"0.0###E0"</code>.
+ *
+ * <li>If signficant digits are in use, then the integer and fraction
+ * digit counts, as set via the API, are ignored. If significant
+ * digits are not in use, then the signficant digit counts, as set via
+ * the API, are ignored.
+ *
+ * </ul>
+ *
+ * <p><strong>Padding</strong>
+ *
+ * <p>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, <code>"$*x#,##0.00"</code> formats 123 to
+ * <code>"$xx123.00"</code>, and 1234 to <code>"$1,234.00"</code>.
+ *
+ * <ul>
+ * <li>When padding is in effect, the width of the positive subpattern,
+ * including prefix and suffix, determines the format width. For example, in
+ * the pattern <code>"* #0 o''clock"</code>, the format width is 10.
+ *
+ * <li>The width is counted in 16-bit code units (UChars).
+ *
+ * <li>Some parameters which usually do not matter have meaning when padding is
+ * used, because the pattern width is significant with padding. In the pattern
+ * "* ##,##,#,##0.##", the format width is 14. The initial characters "##,##,"
+ * do not affect the grouping size or maximum integer digits, but they do affect
+ * the format width.
+ *
+ * <li>Padding may be inserted at one of four locations: before the prefix,
+ * after the prefix, before the suffix, or after the suffix. If padding is
+ * specified in any other location, applyPattern()
+ * sets a failing UErrorCode. If there is no prefix,
+ * before the prefix and after the prefix are equivalent, likewise for the
+ * suffix.
+ *
+ * <li>When specified in a pattern, the 32-bit code point immediately
+ * following the pad escape is the pad character. This may be any character,
+ * including a special pattern character. That is, the pad escape
+ * <em>escapes</em> the following character. If there is no character after
+ * the pad escape, then the pattern is illegal.
+ *
+ * </ul>
+ *
+ * <p><strong>Rounding</strong>
+ *
+ * <p>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.
+ *
+ * <ul>
+ * <li>Rounding only affects the string produced by formatting. It does
+ * not affect parsing or change any numerical values.
+ *
+ * <li>A <em>rounding mode</em> determines how values are rounded; see
+ * DecimalFormat::ERoundingMode. Rounding increments specified in
+ * patterns use the default mode, DecimalFormat::kRoundHalfEven.
+ *
+ * <li>Some locales use rounding in their currency formats to reflect the
+ * smallest currency denomination.
+ *
+ * <li>In a pattern, digits '1' through '9' specify rounding, but otherwise
+ * behave identically to digit '0'.
+ * </ul>
+ *
+ * <p><strong>Synchronization</strong>
+ *
+ * <p>DecimalFormat objects are not synchronized. Multiple
+ * threads should not access one formatter concurrently.
+ *
+ * <p><strong>Subclassing</strong>
+ *
+ * <p><em>User subclasses are not supported.</em> While clients may write
+ * subclasses, such code will not necessarily work and will not be
+ * guaranteed to work stably from release to release.
*/
class U_I18N_API DecimalFormat: public NumberFormat {
public:
- /** Rounding mode
- * @draft ICU 2.4
- */
+ /**
+ * Rounding mode.
+ * @stable ICU 2.4
+ */
enum ERoundingMode {
- kRoundCeiling,
- kRoundFloor,
- kRoundDown,
- kRoundUp,
- kRoundHalfEven,
- kRoundHalfDown,
- kRoundHalfUp
+ kRoundCeiling, /**< Round towards positive infinity */
+ kRoundFloor, /**< Round towards negative infinity */
+ kRoundDown, /**< Round towards zero */
+ kRoundUp, /**< Round away from zero */
+ kRoundHalfEven, /**< Round towards the nearest integer, or
+ towards the nearest even integer if equidistant */
+ kRoundHalfDown, /**< Round towards the nearest integer, or
+ towards zero if equidistant */
+ kRoundHalfUp /**< Round towards the nearest integer, or
+ away from zero if equidistant */
// We don't support ROUND_UNNECESSARY
};
- /** Pad position
- * @draft ICU 2.4
- */
+ /**
+ * Pad position.
+ * @stable ICU 2.4
+ */
enum EPadPosition {
kPadBeforePrefix,
kPadAfterPrefix,
virtual UnicodeString& format(int32_t number,
UnicodeString& appendTo,
FieldPosition& pos) const;
+ /**
+ * Format an int64 number using base-10 representation.
+ *
+ * @param number The value to be formatted.
+ * @param appendTo Output parameter to receive result.
+ * Result is appended to existing contents.
+ * @param pos On input: an alignment field, if desired.
+ * On output: the offsets of the alignment field.
+ * @return Reference to 'appendTo' parameter.
+ * @stable ICU 2.8
+ */
+ virtual UnicodeString& format(int64_t number,
+ UnicodeString& appendTo,
+ FieldPosition& pos) const;
+
/**
* Format a Formattable using base-10 representation.
*
UnicodeString& format(int32_t number,
UnicodeString& appendTo) const;
+ /**
+ * Redeclared NumberFormat method.
+ * Format an int64 number. These methods call the NumberFormat
+ * pure virtual format() methods with the default FieldPosition.
+ *
+ * @param number The value to be formatted.
+ * @param appendTo Output parameter to receive result.
+ * Result is appended to existing contents.
+ * @return Reference to 'appendTo' parameter.
+ * @stable ICU 2.8
+ */
+ UnicodeString& format(int64_t number,
+ UnicodeString& appendTo) const;
/**
* Parse the given string using this object's choices. The method
* does string comparisons to try to find an optimal match.
* If no object can be parsed, index is unchanged, and NULL is
* returned. The result is returned as the most parsimonious
- * type of <code>Formattable</code> that will accomodate all of the
+ * 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.
Formattable& result,
UErrorCode& status) const;
+ /**
+ * Parses text from the given string as a currency amount. Unlike
+ * the parse() method, this method will attempt to parse a generic
+ * currency name, searching for a match of this object's locale's
+ * currency display names, or for a 3-letter ISO currency code.
+ * This method will fail if this format is not a currency format,
+ * that is, if it does not contain the currency pattern symbol
+ * (U+00A4) in its prefix or suffix.
+ *
+ * @param text the string to parse
+ * @param result output parameter to receive result. This will have
+ * its currency set to the parsed ISO currency code.
+ * @param pos input-output position; on input, the position within
+ * text to match; must have 0 <= pos.getIndex() < text.length();
+ * on output, the position after the last matched character. If
+ * the parse fails, the position in unchanged upon output.
+ * @return a reference to result
+ * @internal
+ */
+ virtual Formattable& parseCurrency(const UnicodeString& text,
+ Formattable& result,
+ ParsePosition& pos) const;
+
/**
* Returns the decimal format symbols, which is generally not changed
* by the programmer or user.
* 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.
+ * 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
* 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.
+ * 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
* @see #setRoundingMode
* @stable ICU 2.0
*/
- virtual double getRoundingIncrement(void);
+ virtual double getRoundingIncrement(void) const;
/**
* Set the rounding increment. This method also controls whether
* @see #setRoundingMode
* @stable ICU 2.0
*/
- virtual ERoundingMode getRoundingMode(void);
+ virtual ERoundingMode getRoundingMode(void) const;
/**
* Set the rounding mode. This has no effect unless the rounding
virtual void setRoundingMode(ERoundingMode roundingMode);
/**
- * Get the width to which the output of <code>format()</code> is padded.
+ * 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 #getPadCharacter
+ * @see #getPadCharacterString
* @see #setPadCharacter
* @see #getPadPosition
* @see #setPadPosition
* @stable ICU 2.0
*/
- virtual int32_t getFormatWidth(void);
+ virtual int32_t getFormatWidth(void) const;
/**
- * Set the width to which the output of <code>format()</code> is padded.
+ * 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
- * <code>format()</code>, or zero to disable padding. A negative
+ * format(), or zero to disable padding. A negative
* width is equivalent to 0.
* @see #getFormatWidth
- * @see #getPadCharacter
+ * @see #getPadCharacterString
* @see #setPadCharacter
* @see #getPadPosition
* @see #setPadPosition
virtual void setFormatWidth(int32_t width);
/**
- * Get the grapheme string (a character, possibly with modifier letters)
- * used to pad to the format width. The default is " ".
- * Note: The current implementation only stores the first code unit of the
- * pad string.
- * @return the pad grapheme string
+ * 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 #setPadPosition
* @stable ICU 2.0
*/
- virtual UnicodeString getPadCharacterString();
+ virtual UnicodeString getPadCharacterString() const;
/**
- * Set the grapheme string (a character, possibly with modifier letters)
- * used to pad to the format width. This has no effect
- * unless padding is enabled.
- * Note: The current implementation only stores the first code unit of the
- * pad string.
- * @param padChar the pad grapheme
+ * 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 #getPadCharacter
+ * @see #getPadCharacterString
* @see #getPadPosition
* @see #setPadPosition
* @stable ICU 2.0
/**
* 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>
+ * at which padding will be inserted if the result of format()
* 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>.
+ * @return the pad position, one of kPadBeforePrefix,
+ * kPadAfterPrefix, kPadBeforeSuffix, or
+ * kPadAfterSuffix.
* @see #setFormatWidth
* @see #getFormatWidth
* @see #setPadCharacter
- * @see #getPadCharacter
+ * @see #getPadCharacterString
* @see #setPadPosition
- * @see #kPadBeforePrefix
- * @see #kPadAfterPrefix
- * @see #kPadBeforeSuffix
- * @see #kPadAfterSuffix
+ * @see #EPadPosition
* @stable ICU 2.0
*/
- virtual EPadPosition getPadPosition(void);
+ virtual EPadPosition getPadPosition(void) const;
/**
- * <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>
+ * 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 <code>kPadBeforePrefix</code>,
- * <code>kPadAfterPrefix</code>, <code>kPadBeforeSuffix</code>, or
- * <code>kPadAfterSuffix</code>.
+ * @param padPos the pad position, one of kPadBeforePrefix,
+ * kPadAfterPrefix, kPadBeforeSuffix, or
+ * kPadAfterSuffix.
* @see #setFormatWidth
* @see #getFormatWidth
* @see #setPadCharacter
- * @see #getPadCharacter
+ * @see #getPadCharacterString
* @see #getPadPosition
- * @see #kPadBeforePrefix
- * @see #kPadAfterPrefix
- * @see #kPadBeforeSuffix
- * @see #kPadAfterSuffix
+ * @see #EPadPosition
* @stable ICU 2.0
*/
virtual void setPadPosition(EPadPosition padPos);
virtual UBool isScientificNotation(void);
/**
- * Set whether or not scientific notation is used.
+ * 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 #setExponentSignAlwaysShown
* @stable ICU 2.0
*/
- virtual int8_t getMinimumExponentDigits(void);
+ virtual int8_t getMinimumExponentDigits(void) const;
/**
* Set the minimum exponent digits that will be shown. This has no
* 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
- * <code>getGroupingSize()</code>. For example, if the primary
+ * 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".
* @see setSecondaryGroupingSize
* @see NumberFormat::isGroupingUsed
* @see DecimalFormatSymbols::getGroupingSeparator
- * @draft ICU 2.4
+ * @stable ICU 2.4
*/
int32_t getSecondaryGroupingSize(void) const;
* @see getSecondaryGroupingSize
* @see NumberFormat#setGroupingUsed
* @see DecimalFormatSymbols::setGroupingSeparator
- * @draft ICU 2.4
+ * @stable ICU 2.4
*/
virtual void setSecondaryGroupingSize(int32_t newValue);
*/
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 <code>min</code> is less than one then it is set
+ * to one. If the maximum significant digits count is less than
+ * <code>min</code>, then it is set to <code>min</code>. This
+ * value has no effect unless areSignificantDigits() returns true.
+ * @param min the fewest significant digits to be shown
+ * @stable ICU 3.0
+ */
+ void setMinimumSignificantDigits(int32_t min);
+
+ /**
+ * Sets the maximum number of significant digits that will be
+ * displayed. If <code>max</code> is less than one then it is set
+ * to one. If the minimum significant digits count is greater
+ * than <code>max</code>, then it is set to <code>max</code>.
+ * This value has no effect unless areSignificantDigits() returns
+ * true.
+ * @param max the most significant digits to be shown
+ * @stable ICU 3.0
+ */
+ void setMaximumSignificantDigits(int32_t max);
+
+ /**
+ * Returns true if significant digits are in use, or false if
+ * integer and fraction digit counts are in use.
+ * @return true if significant digits are in use
+ * @stable ICU 3.0
+ */
+ UBool areSignificantDigitsUsed() const;
+
+ /**
+ * Sets whether significant digits are in use, or integer and
+ * fraction digit counts are in use.
+ * @param useSignificantDigits true to use significant digits, or
+ * false to use integer and fraction digit counts
+ * @stable ICU 3.0
+ */
+ void setSignificantDigitsUsed(UBool useSignificantDigits);
+
+ public:
/**
* Sets the currency used to display currency
* amounts. This takes effect immediately, if this format is a
* 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.
- * @draft ICU 2.2
+ * to use. It need not be null-terminated. May be the empty
+ * string or NULL to indicate no currency.
+ * @param ec input-output error code
+ * @stable ICU 3.0
+ */
+ virtual void setCurrency(const UChar* theCurrency, UErrorCode& ec);
+
+ /**
+ * Sets the currency used to display currency amounts. See
+ * setCurrency(const UChar*, UErrorCode&).
+ * @deprecated ICU 3.0. Use setCurrency(const UChar*, UErrorCode&).
*/
virtual void setCurrency(const UChar* theCurrency);
/**
* The resource tags we use to retrieve decimal format data from
* locale resource bundles.
- * @stable ICU 2.0
+ * @deprecated ICU 3.4. This string has no public purpose. Please don't use it.
*/
static const char fgNumberPatterns[];
* @return The class ID for all objects of this class.
* @stable ICU 2.0
*/
- static inline UClassID getStaticClassID(void);
+ static UClassID U_EXPORT2 getStaticClassID(void);
/**
* Returns a unique class ID POLYMORPHICALLY. Pure virtual override.
virtual UClassID getDynamicClassID(void) const;
private:
- static const char fgClassID;
-
DecimalFormat(); // default constructor not implemented
+ int32_t precision(UBool isIntegral) const;
+
/**
* Do real work of constructing a new DecimalFormat.
*/
DigitList& digits,
UBool isInteger) const;
+ void parse(const UnicodeString& text,
+ Formattable& result,
+ ParsePosition& pos,
+ UBool parseCurrency) const;
+
enum {
fgStatusInfinite,
fgStatusLength // Leave last in list.
} StatusFlags;
- /**
- * 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.
- */
UBool subparse(const UnicodeString& text, ParsePosition& parsePosition,
- DigitList& digits, UBool* status) const;
+ DigitList& digits, UBool* status,
+ UChar* currency) const;
int32_t skipPadding(const UnicodeString& text, int32_t position) const;
int32_t compareAffix(const UnicodeString& input,
int32_t pos,
UBool isNegative,
- UBool isPrefix) const;
+ UBool isPrefix,
+ UChar* currency) const;
static int32_t compareSimpleAffix(const UnicodeString& affix,
const UnicodeString& input,
- int32_t pos);
+ int32_t pos,
+ UBool strict);
static int32_t skipRuleWhiteSpace(const UnicodeString& text, int32_t pos);
int32_t compareComplexAffix(const UnicodeString& affixPat,
const UnicodeString& input,
- int32_t pos) const;
+ int32_t pos,
+ UChar* currency) const;
static int32_t match(const UnicodeString& text, int32_t pos, UChar32 ch);
static int32_t match(const UnicodeString& text, int32_t pos, const UnicodeString& str);
-
+
+ static UBool matchSymbol(const UnicodeString &text, int32_t position, int32_t length, const UnicodeString &symbol,
+ UnicodeSet *sset, UChar32 schar);
+
/**
* Get a decimal format symbol.
* Returns a const reference to the symbol string.
void setCurrencyForSymbols();
- void setCurrencyForLocale(const char* locale, UErrorCode& ec);
-
/**
* Constants.
*/
int32_t fMultiplier;
int32_t fGroupingSize;
int32_t fGroupingSize2;
- UBool fDecimalSeparatorAlwaysShown;
- /*transient*/ UBool fIsCurrencyFormat;
+ UBool fDecimalSeparatorAlwaysShown;
+ /*transient*/ UBool fIsCurrencyFormat;
DecimalFormatSymbols* fSymbols;
- UBool fUseExponentialNotation;
+ UBool fUseSignificantDigits;
+ int32_t fMinSignificantDigits;
+ int32_t fMaxSignificantDigits;
+
+ UBool fUseExponentialNotation;
int8_t fMinExponentDigits;
- UBool fExponentSignAlwaysShown;
+ UBool fExponentSignAlwaysShown;
/* If fRoundingIncrement is NULL, there is no rounding. Otherwise, round to
* fRoundingIncrement.getDouble(). Since this operation may be expensive,
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:
+
+ /**
+ * Returns the currency in effect for this formatter. Subclasses
+ * should override this method as needed. Unlike getCurrency(),
+ * this method should never return "".
+ * @result output parameter for null-terminated result, which must
+ * have a capacity of at least 4
+ * @internal
+ */
+ virtual void getEffectiveCurrency(UChar* result, UErrorCode& ec) const;
+
/** number of integer digits
- * @draft ICU 2.4
+ * @stable ICU 2.4
*/
static const int32_t kDoubleIntegerDigits;
/** number of fraction digits
- * @draft ICU 2.4
+ * @stable ICU 2.4
*/
static const int32_t kDoubleFractionDigits;
-};
-inline UClassID
-DecimalFormat::getStaticClassID(void)
-{ return (UClassID)&fgClassID; }
-
-inline UClassID
-DecimalFormat::getDynamicClassID(void) const
-{ return DecimalFormat::getStaticClassID(); }
+ /**
+ * When someone turns on scientific mode, we assume that more than this
+ * number of digits is due to flipping from some other mode that didn't
+ * restrict the maximum, and so we force 1 integer digit. We don't bother
+ * to track and see if someone is using exponential notation with more than
+ * this number, it wouldn't make sense anyway, and this is just to make sure
+ * that someone turning on scientific mode with default settings doesn't
+ * end up with lots of zeroes.
+ * @stable ICU 2.8
+ */
+ static const int32_t kMaxScientificIntegerDigits;
+};
inline UnicodeString&
DecimalFormat::format(const Formattable& obj,
DecimalFormat::format(int32_t number,
UnicodeString& appendTo) const {
FieldPosition pos(0);
- return format(number, appendTo, pos);
+ return format((int64_t)number, appendTo, pos);
}
inline const UnicodeString &
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