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diff --git a/intl/icu/source/i18n/unicode/rbnf.h b/intl/icu/source/i18n/unicode/rbnf.h new file mode 100644 index 0000000000..0336ac1f81 --- /dev/null +++ b/intl/icu/source/i18n/unicode/rbnf.h @@ -0,0 +1,1142 @@ +// © 2016 and later: Unicode, Inc. and others. +// License & terms of use: http://www.unicode.org/copyright.html +/* +******************************************************************************* +* Copyright (C) 1997-2015, International Business Machines Corporation and others. +* All Rights Reserved. +******************************************************************************* +*/ + +#ifndef RBNF_H +#define RBNF_H + +#include "unicode/utypes.h" + +#if U_SHOW_CPLUSPLUS_API + +/** + * \file + * \brief C++ API: Rule Based Number Format + */ + +/** + * \def U_HAVE_RBNF + * This will be 0 if RBNF support is not included in ICU + * and 1 if it is. + * + * @stable ICU 2.4 + */ +#if UCONFIG_NO_FORMATTING +#define U_HAVE_RBNF 0 +#else +#define U_HAVE_RBNF 1 + +#include "unicode/dcfmtsym.h" +#include "unicode/fmtable.h" +#include "unicode/locid.h" +#include "unicode/numfmt.h" +#include "unicode/unistr.h" +#include "unicode/strenum.h" +#include "unicode/brkiter.h" +#include "unicode/upluralrules.h" + +U_NAMESPACE_BEGIN + +class NFRule; +class NFRuleSet; +class LocalizationInfo; +class PluralFormat; +class RuleBasedCollator; + +/** + * Tags for the predefined rulesets. + * + * @stable ICU 2.2 + */ +enum URBNFRuleSetTag { + /** + * Requests predefined ruleset for spelling out numeric values in words. + * @stable ICU 2.2 + */ + URBNF_SPELLOUT, + /** + * Requests predefined ruleset for the ordinal form of a number. + * @stable ICU 2.2 + */ + URBNF_ORDINAL, + /** + * Requests predefined ruleset for formatting a value as a duration in hours, minutes, and seconds. + * @stable ICU 2.2 + */ + URBNF_DURATION, + /** + * Requests predefined ruleset for various non-place-value numbering systems. + * WARNING: The same resource contains rule sets for a variety of different numbering systems. + * You need to call setDefaultRuleSet() on the formatter to choose the actual numbering system. + * @stable ICU 2.2 + */ + URBNF_NUMBERING_SYSTEM, +#ifndef U_HIDE_DEPRECATED_API + /** + * One more than the highest normal URBNFRuleSetTag value. + * @deprecated ICU 58 The numeric value may change over time, see ICU ticket #12420. + */ + URBNF_COUNT +#endif // U_HIDE_DEPRECATED_API +}; + +/** + * The RuleBasedNumberFormat class formats numbers according to a set of rules. This number formatter is + * typically used for spelling out numeric values in words (e.g., 25,3476 as + * "twenty-five thousand three hundred seventy-six" or "vingt-cinq mille trois + * cents soixante-seize" or + * "fünfundzwanzigtausenddreihundertsechsundsiebzig"), but can also be used for + * other complicated formatting tasks, such as formatting a number of seconds as hours, + * minutes and seconds (e.g., 3,730 as "1:02:10"). + * + * <p>The resources contain three predefined formatters for each locale: spellout, which + * spells out a value in words (123 is "one hundred twenty-three"); ordinal, which + * appends an ordinal suffix to the end of a numeral (123 is "123rd"); and + * duration, which shows a duration in seconds as hours, minutes, and seconds (123 is + * "2:03"). The client can also define more specialized <tt>RuleBasedNumberFormat</tt>s + * by supplying programmer-defined rule sets.</p> + * + * <p>The behavior of a <tt>RuleBasedNumberFormat</tt> is specified by a textual description + * that is either passed to the constructor as a <tt>String</tt> or loaded from a resource + * bundle. In its simplest form, the description consists of a semicolon-delimited list of <em>rules.</em> + * Each rule has a string of output text and a value or range of values it is applicable to. + * In a typical spellout rule set, the first twenty rules are the words for the numbers from + * 0 to 19:</p> + * + * <pre>zero; one; two; three; four; five; six; seven; eight; nine; + * ten; eleven; twelve; thirteen; fourteen; fifteen; sixteen; seventeen; eighteen; nineteen;</pre> + * + * <p>For larger numbers, we can use the preceding set of rules to format the ones place, and + * we only have to supply the words for the multiples of 10:</p> + * + * <pre> 20: twenty[->>]; + * 30: thirty[->>]; + * 40: forty[->>]; + * 50: fifty[->>]; + * 60: sixty[->>]; + * 70: seventy[->>]; + * 80: eighty[->>]; + * 90: ninety[->>];</pre> + * + * <p>In these rules, the <em>base value</em> is spelled out explicitly and set off from the + * rule's output text with a colon. The rules are in a sorted list, and a rule is applicable + * to all numbers from its own base value to one less than the next rule's base value. The + * ">>" token is called a <em>substitution</em> and tells the formatter to + * isolate the number's ones digit, format it using this same set of rules, and place the + * result at the position of the ">>" token. Text in brackets is omitted if + * the number being formatted is an even multiple of 10 (the hyphen is a literal hyphen; 24 + * is "twenty-four," not "twenty four").</p> + * + * <p>For even larger numbers, we can actually look up several parts of the number in the + * list:</p> + * + * <pre>100: << hundred[ >>];</pre> + * + * <p>The "<<" represents a new kind of substitution. The << isolates + * the hundreds digit (and any digits to its left), formats it using this same rule set, and + * places the result where the "<<" was. Notice also that the meaning of + * >> has changed: it now refers to both the tens and the ones digits. The meaning of + * both substitutions depends on the rule's base value. The base value determines the rule's <em>divisor,</em> + * which is the highest power of 10 that is less than or equal to the base value (the user + * can change this). To fill in the substitutions, the formatter divides the number being + * formatted by the divisor. The integral quotient is used to fill in the << + * substitution, and the remainder is used to fill in the >> substitution. The meaning + * of the brackets changes similarly: text in brackets is omitted if the value being + * formatted is an even multiple of the rule's divisor. The rules are applied recursively, so + * if a substitution is filled in with text that includes another substitution, that + * substitution is also filled in.</p> + * + * <p>This rule covers values up to 999, at which point we add another rule:</p> + * + * <pre>1000: << thousand[ >>];</pre> + * + * <p>Again, the meanings of the brackets and substitution tokens shift because the rule's + * base value is a higher power of 10, changing the rule's divisor. This rule can actually be + * used all the way up to 999,999. This allows us to finish out the rules as follows:</p> + * + * <pre> 1,000,000: << million[ >>]; + * 1,000,000,000: << billion[ >>]; + * 1,000,000,000,000: << trillion[ >>]; + * 1,000,000,000,000,000: OUT OF RANGE!;</pre> + * + * <p>Commas, periods, and spaces can be used in the base values to improve legibility and + * are ignored by the rule parser. The last rule in the list is customarily treated as an + * "overflow rule," applying to everything from its base value on up, and often (as + * in this example) being used to print out an error message or default representation. + * Notice also that the size of the major groupings in large numbers is controlled by the + * spacing of the rules: because in English we group numbers by thousand, the higher rules + * are separated from each other by a factor of 1,000.</p> + * + * <p>To see how these rules actually work in practice, consider the following example: + * Formatting 25,430 with this rule set would work like this:</p> + * + * <table border="0" width="100%"> + * <tr> + * <td><strong><< thousand >></strong></td> + * <td>[the rule whose base value is 1,000 is applicable to 25,340]</td> + * </tr> + * <tr> + * <td><strong>twenty->></strong> thousand >></td> + * <td>[25,340 over 1,000 is 25. The rule for 20 applies.]</td> + * </tr> + * <tr> + * <td>twenty-<strong>five</strong> thousand >></td> + * <td>[25 mod 10 is 5. The rule for 5 is "five."</td> + * </tr> + * <tr> + * <td>twenty-five thousand <strong><< hundred >></strong></td> + * <td>[25,340 mod 1,000 is 340. The rule for 100 applies.]</td> + * </tr> + * <tr> + * <td>twenty-five thousand <strong>three</strong> hundred >></td> + * <td>[340 over 100 is 3. The rule for 3 is "three."]</td> + * </tr> + * <tr> + * <td>twenty-five thousand three hundred <strong>forty</strong></td> + * <td>[340 mod 100 is 40. The rule for 40 applies. Since 40 divides + * evenly by 10, the hyphen and substitution in the brackets are omitted.]</td> + * </tr> + * </table> + * + * <p>The above syntax suffices only to format positive integers. To format negative numbers, + * we add a special rule:</p> + * + * <pre>-x: minus >>;</pre> + * + * <p>This is called a <em>negative-number rule,</em> and is identified by "-x" + * where the base value would be. This rule is used to format all negative numbers. the + * >> token here means "find the number's absolute value, format it with these + * rules, and put the result here."</p> + * + * <p>We also add a special rule called a <em>fraction rule </em>for numbers with fractional + * parts:</p> + * + * <pre>x.x: << point >>;</pre> + * + * <p>This rule is used for all positive non-integers (negative non-integers pass through the + * negative-number rule first and then through this rule). Here, the << token refers to + * the number's integral part, and the >> to the number's fractional part. The + * fractional part is formatted as a series of single-digit numbers (e.g., 123.456 would be + * formatted as "one hundred twenty-three point four five six").</p> + * + * <p>To see how this rule syntax is applied to various languages, examine the resource data.</p> + * + * <p>There is actually much more flexibility built into the rule language than the + * description above shows. A formatter may own multiple rule sets, which can be selected by + * the caller, and which can use each other to fill in their substitutions. Substitutions can + * also be filled in with digits, using a DecimalFormat object. There is syntax that can be + * used to alter a rule's divisor in various ways. And there is provision for much more + * flexible fraction handling. A complete description of the rule syntax follows:</p> + * + * <hr> + * + * <p>The description of a <tt>RuleBasedNumberFormat</tt>'s behavior consists of one or more <em>rule + * sets.</em> Each rule set consists of a name, a colon, and a list of <em>rules.</em> A rule + * set name must begin with a % sign. Rule sets with names that begin with a single % sign + * are <em>public:</em> the caller can specify that they be used to format and parse numbers. + * Rule sets with names that begin with %% are <em>private:</em> they exist only for the use + * of other rule sets. If a formatter only has one rule set, the name may be omitted.</p> + * + * <p>The user can also specify a special "rule set" named <tt>%%lenient-parse</tt>. + * The body of <tt>%%lenient-parse</tt> isn't a set of number-formatting rules, but a <tt>RuleBasedCollator</tt> + * description which is used to define equivalences for lenient parsing. For more information + * on the syntax, see <tt>RuleBasedCollator</tt>. For more information on lenient parsing, + * see <tt>setLenientParse()</tt>. <em>Note:</em> symbols that have syntactic meaning + * in collation rules, such as '&', have no particular meaning when appearing outside + * of the <tt>lenient-parse</tt> rule set.</p> + * + * <p>The body of a rule set consists of an ordered, semicolon-delimited list of <em>rules.</em> + * Internally, every rule has a base value, a divisor, rule text, and zero, one, or two <em>substitutions.</em> + * These parameters are controlled by the description syntax, which consists of a <em>rule + * descriptor,</em> a colon, and a <em>rule body.</em></p> + * + * <p>A rule descriptor can take one of the following forms (text in <em>italics</em> is the + * name of a token):</p> + * + * <table border="0" width="100%"> + * <tr> + * <td><em>bv</em>:</td> + * <td><em>bv</em> specifies the rule's base value. <em>bv</em> is a decimal + * number expressed using ASCII digits. <em>bv</em> may contain spaces, period, and commas, + * which are ignored. The rule's divisor is the highest power of 10 less than or equal to + * the base value.</td> + * </tr> + * <tr> + * <td><em>bv</em>/<em>rad</em>:</td> + * <td><em>bv</em> specifies the rule's base value. The rule's divisor is the + * highest power of <em>rad</em> less than or equal to the base value.</td> + * </tr> + * <tr> + * <td><em>bv</em>>:</td> + * <td><em>bv</em> specifies the rule's base value. To calculate the divisor, + * let the radix be 10, and the exponent be the highest exponent of the radix that yields a + * result less than or equal to the base value. Every > character after the base value + * decreases the exponent by 1. If the exponent is positive or 0, the divisor is the radix + * raised to the power of the exponent; otherwise, the divisor is 1.</td> + * </tr> + * <tr> + * <td><em>bv</em>/<em>rad</em>>:</td> + * <td><em>bv</em> specifies the rule's base value. To calculate the divisor, + * let the radix be <em>rad</em>, and the exponent be the highest exponent of the radix that + * yields a result less than or equal to the base value. Every > character after the radix + * decreases the exponent by 1. If the exponent is positive or 0, the divisor is the radix + * raised to the power of the exponent; otherwise, the divisor is 1.</td> + * </tr> + * <tr> + * <td>-x:</td> + * <td>The rule is a negative-number rule.</td> + * </tr> + * <tr> + * <td>x.x:</td> + * <td>The rule is an <em>improper fraction rule</em>. If the full stop in + * the middle of the rule name is replaced with the decimal point + * that is used in the language or DecimalFormatSymbols, then that rule will + * have precedence when formatting and parsing this rule. For example, some + * languages use the comma, and can thus be written as x,x instead. For example, + * you can use "x.x: << point >>;x,x: << comma >>;" to + * handle the decimal point that matches the language's natural spelling of + * the punctuation of either the full stop or comma.</td> + * </tr> + * <tr> + * <td>0.x:</td> + * <td>The rule is a <em>proper fraction rule</em>. If the full stop in + * the middle of the rule name is replaced with the decimal point + * that is used in the language or DecimalFormatSymbols, then that rule will + * have precedence when formatting and parsing this rule. For example, some + * languages use the comma, and can thus be written as 0,x instead. For example, + * you can use "0.x: point >>;0,x: comma >>;" to + * handle the decimal point that matches the language's natural spelling of + * the punctuation of either the full stop or comma.</td> + * </tr> + * <tr> + * <td>x.0:</td> + * <td>The rule is a <em>default rule</em>. If the full stop in + * the middle of the rule name is replaced with the decimal point + * that is used in the language or DecimalFormatSymbols, then that rule will + * have precedence when formatting and parsing this rule. For example, some + * languages use the comma, and can thus be written as x,0 instead. For example, + * you can use "x.0: << point;x,0: << comma;" to + * handle the decimal point that matches the language's natural spelling of + * the punctuation of either the full stop or comma.</td> + * </tr> + * <tr> + * <td>Inf:</td> + * <td>The rule for infinity.</td> + * </tr> + * <tr> + * <td>NaN:</td> + * <td>The rule for an IEEE 754 NaN (not a number).</td> + * </tr> + * <tr> + * <td><em>nothing</em></td> + * <td>If the rule's rule descriptor is left out, the base value is one plus the + * preceding rule's base value (or zero if this is the first rule in the list) in a normal + * rule set. In a fraction rule set, the base value is the same as the preceding rule's + * base value.</td> + * </tr> + * </table> + * + * <p>A rule set may be either a regular rule set or a <em>fraction rule set,</em> depending + * on whether it is used to format a number's integral part (or the whole number) or a + * number's fractional part. Using a rule set to format a rule's fractional part makes it a + * fraction rule set.</p> + * + * <p>Which rule is used to format a number is defined according to one of the following + * algorithms: If the rule set is a regular rule set, do the following: + * + * <ul> + * <li>If the rule set includes a default rule (and the number was passed in as a <tt>double</tt>), + * use the default rule. (If the number being formatted was passed in as a <tt>long</tt>, + * the default rule is ignored.)</li> + * <li>If the number is negative, use the negative-number rule.</li> + * <li>If the number has a fractional part and is greater than 1, use the improper fraction + * rule.</li> + * <li>If the number has a fractional part and is between 0 and 1, use the proper fraction + * rule.</li> + * <li>Binary-search the rule list for the rule with the highest base value less than or equal + * to the number. If that rule has two substitutions, its base value is not an even multiple + * of its divisor, and the number <em>is</em> an even multiple of the rule's divisor, use the + * rule that precedes it in the rule list. Otherwise, use the rule itself.</li> + * </ul> + * + * <p>If the rule set is a fraction rule set, do the following: + * + * <ul> + * <li>Ignore negative-number and fraction rules.</li> + * <li>For each rule in the list, multiply the number being formatted (which will always be + * between 0 and 1) by the rule's base value. Keep track of the distance between the result + * the nearest integer.</li> + * <li>Use the rule that produced the result closest to zero in the above calculation. In the + * event of a tie or a direct hit, use the first matching rule encountered. (The idea here is + * to try each rule's base value as a possible denominator of a fraction. Whichever + * denominator produces the fraction closest in value to the number being formatted wins.) If + * the rule following the matching rule has the same base value, use it if the numerator of + * the fraction is anything other than 1; if the numerator is 1, use the original matching + * rule. (This is to allow singular and plural forms of the rule text without a lot of extra + * hassle.)</li> + * </ul> + * + * <p>A rule's body consists of a string of characters terminated by a semicolon. The rule + * may include zero, one, or two <em>substitution tokens,</em> and a range of text in + * brackets. The brackets denote optional text (and may also include one or both + * substitutions). The exact meanings of the substitution tokens, and under what conditions + * optional text is omitted, depend on the syntax of the substitution token and the context. + * The rest of the text in a rule body is literal text that is output when the rule matches + * the number being formatted.</p> + * + * <p>A substitution token begins and ends with a <em>token character.</em> The token + * character and the context together specify a mathematical operation to be performed on the + * number being formatted. An optional <em>substitution descriptor </em>specifies how the + * value resulting from that operation is used to fill in the substitution. The position of + * the substitution token in the rule body specifies the location of the resultant text in + * the original rule text.</p> + * + * <p>The meanings of the substitution token characters are as follows:</p> + * + * <table border="0" width="100%"> + * <tr> + * <td>>></td> + * <td>in normal rule</td> + * <td>Divide the number by the rule's divisor and format the remainder</td> + * </tr> + * <tr> + * <td></td> + * <td>in negative-number rule</td> + * <td>Find the absolute value of the number and format the result</td> + * </tr> + * <tr> + * <td></td> + * <td>in fraction or default rule</td> + * <td>Isolate the number's fractional part and format it.</td> + * </tr> + * <tr> + * <td></td> + * <td>in rule in fraction rule set</td> + * <td>Not allowed.</td> + * </tr> + * <tr> + * <td>>>></td> + * <td>in normal rule</td> + * <td>Divide the number by the rule's divisor and format the remainder, + * but bypass the normal rule-selection process and just use the + * rule that precedes this one in this rule list.</td> + * </tr> + * <tr> + * <td></td> + * <td>in all other rules</td> + * <td>Not allowed.</td> + * </tr> + * <tr> + * <td><<</td> + * <td>in normal rule</td> + * <td>Divide the number by the rule's divisor and format the quotient</td> + * </tr> + * <tr> + * <td></td> + * <td>in negative-number rule</td> + * <td>Not allowed.</td> + * </tr> + * <tr> + * <td></td> + * <td>in fraction or default rule</td> + * <td>Isolate the number's integral part and format it.</td> + * </tr> + * <tr> + * <td></td> + * <td>in rule in fraction rule set</td> + * <td>Multiply the number by the rule's base value and format the result.</td> + * </tr> + * <tr> + * <td>==</td> + * <td>in all rule sets</td> + * <td>Format the number unchanged</td> + * </tr> + * <tr> + * <td>[]</td> + * <td>in normal rule</td> + * <td>Omit the optional text if the number is an even multiple of the rule's divisor</td> + * </tr> + * <tr> + * <td></td> + * <td>in negative-number rule</td> + * <td>Not allowed.</td> + * </tr> + * <tr> + * <td></td> + * <td>in improper-fraction rule</td> + * <td>Omit the optional text if the number is between 0 and 1 (same as specifying both an + * x.x rule and a 0.x rule)</td> + * </tr> + * <tr> + * <td></td> + * <td>in default rule</td> + * <td>Omit the optional text if the number is an integer (same as specifying both an x.x + * rule and an x.0 rule)</td> + * </tr> + * <tr> + * <td></td> + * <td>in proper-fraction rule</td> + * <td>Not allowed.</td> + * </tr> + * <tr> + * <td></td> + * <td>in rule in fraction rule set</td> + * <td>Omit the optional text if multiplying the number by the rule's base value yields 1.</td> + * </tr> + * <tr> + * <td width="37">$(cardinal,<i>plural syntax</i>)$</td> + * <td width="23"></td> + * <td width="165" valign="top">in all rule sets</td> + * <td>This provides the ability to choose a word based on the number divided by the radix to the power of the + * exponent of the base value for the specified locale, which is normally equivalent to the << value. + * This uses the cardinal plural rules from PluralFormat. All strings used in the plural format are treated + * as the same base value for parsing.</td> + * </tr> + * <tr> + * <td width="37">$(ordinal,<i>plural syntax</i>)$</td> + * <td width="23"></td> + * <td width="165" valign="top">in all rule sets</td> + * <td>This provides the ability to choose a word based on the number divided by the radix to the power of the + * exponent of the base value for the specified locale, which is normally equivalent to the << value. + * This uses the ordinal plural rules from PluralFormat. All strings used in the plural format are treated + * as the same base value for parsing.</td> + * </tr> + * </table> + * + * <p>The substitution descriptor (i.e., the text between the token characters) may take one + * of three forms:</p> + * + * <table border="0" width="100%"> + * <tr> + * <td>a rule set name</td> + * <td>Perform the mathematical operation on the number, and format the result using the + * named rule set.</td> + * </tr> + * <tr> + * <td>a DecimalFormat pattern</td> + * <td>Perform the mathematical operation on the number, and format the result using a + * DecimalFormat with the specified pattern. The pattern must begin with 0 or #.</td> + * </tr> + * <tr> + * <td>nothing</td> + * <td>Perform the mathematical operation on the number, and format the result using the rule + * set containing the current rule, except: + * <ul> + * <li>You can't have an empty substitution descriptor with a == substitution.</li> + * <li>If you omit the substitution descriptor in a >> substitution in a fraction rule, + * format the result one digit at a time using the rule set containing the current rule.</li> + * <li>If you omit the substitution descriptor in a << substitution in a rule in a + * fraction rule set, format the result using the default rule set for this formatter.</li> + * </ul> + * </td> + * </tr> + * </table> + * + * <p>Whitespace is ignored between a rule set name and a rule set body, between a rule + * descriptor and a rule body, or between rules. If a rule body begins with an apostrophe, + * the apostrophe is ignored, but all text after it becomes significant (this is how you can + * have a rule's rule text begin with whitespace). There is no escape function: the semicolon + * is not allowed in rule set names or in rule text, and the colon is not allowed in rule set + * names. The characters beginning a substitution token are always treated as the beginning + * of a substitution token.</p> + * + * <p>See the resource data and the demo program for annotated examples of real rule sets + * using these features.</p> + * + * <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. + * + * <p><b>Localizations</b></p> + * <p>Constructors are available that allow the specification of localizations for the + * public rule sets (and also allow more control over what public rule sets are available). + * Localization data is represented as a textual description. The description represents + * an array of arrays of string. The first element is an array of the public rule set names, + * each of these must be one of the public rule set names that appear in the rules. Only + * names in this array will be treated as public rule set names by the API. Each subsequent + * element is an array of localizations of these names. The first element of one of these + * subarrays is the locale name, and the remaining elements are localizations of the + * public rule set names, in the same order as they were listed in the first array.</p> + * <p>In the syntax, angle brackets '<', '>' are used to delimit the arrays, and comma ',' is used + * to separate elements of an array. Whitespace is ignored, unless quoted.</p> + * <p>For example:<pre> + * < < %foo, %bar, %baz >, + * < en, Foo, Bar, Baz >, + * < fr, 'le Foo', 'le Bar', 'le Baz' > + * < zh, \\u7532, \\u4e59, \\u4e19 > > + * </pre></p> + * @author Richard Gillam + * @see NumberFormat + * @see DecimalFormat + * @see PluralFormat + * @see PluralRules + * @stable ICU 2.0 + */ +class U_I18N_API RuleBasedNumberFormat : public NumberFormat { +public: + + //----------------------------------------------------------------------- + // constructors + //----------------------------------------------------------------------- + + /** + * Creates a RuleBasedNumberFormat that behaves according to the description + * passed in. The formatter uses the default locale. + * @param rules A description of the formatter's desired behavior. + * See the class documentation for a complete explanation of the description + * syntax. + * @param perror The parse error if an error was encountered. + * @param status The status indicating whether the constructor succeeded. + * @stable ICU 3.2 + */ + RuleBasedNumberFormat(const UnicodeString& rules, UParseError& perror, UErrorCode& status); + + /** + * Creates a RuleBasedNumberFormat that behaves according to the description + * passed in. The formatter uses the default locale. + * <p> + * The localizations data provides information about the public + * rule sets and their localized display names for different + * locales. The first element in the list is an array of the names + * of the public rule sets. The first element in this array is + * the initial default ruleset. The remaining elements in the + * list are arrays of localizations of the names of the public + * rule sets. Each of these is one longer than the initial array, + * with the first String being the ULocale ID, and the remaining + * Strings being the localizations of the rule set names, in the + * same order as the initial array. Arrays are nullptr-terminated. + * @param rules A description of the formatter's desired behavior. + * See the class documentation for a complete explanation of the description + * syntax. + * @param localizations the localization information. + * names in the description. These will be copied by the constructor. + * @param perror The parse error if an error was encountered. + * @param status The status indicating whether the constructor succeeded. + * @stable ICU 3.2 + */ + RuleBasedNumberFormat(const UnicodeString& rules, const UnicodeString& localizations, + UParseError& perror, UErrorCode& status); + + /** + * Creates a RuleBasedNumberFormat that behaves according to the rules + * passed in. The formatter uses the specified locale to determine the + * characters to use when formatting numerals, and to define equivalences + * for lenient parsing. + * @param rules The formatter rules. + * See the class documentation for a complete explanation of the rule + * syntax. + * @param locale A locale that governs which characters are used for + * formatting values in numerals and which characters are equivalent in + * lenient parsing. + * @param perror The parse error if an error was encountered. + * @param status The status indicating whether the constructor succeeded. + * @stable ICU 2.0 + */ + RuleBasedNumberFormat(const UnicodeString& rules, const Locale& locale, + UParseError& perror, UErrorCode& status); + + /** + * Creates a RuleBasedNumberFormat that behaves according to the description + * passed in. The formatter uses the default locale. + * <p> + * The localizations data provides information about the public + * rule sets and their localized display names for different + * locales. The first element in the list is an array of the names + * of the public rule sets. The first element in this array is + * the initial default ruleset. The remaining elements in the + * list are arrays of localizations of the names of the public + * rule sets. Each of these is one longer than the initial array, + * with the first String being the ULocale ID, and the remaining + * Strings being the localizations of the rule set names, in the + * same order as the initial array. Arrays are nullptr-terminated. + * @param rules A description of the formatter's desired behavior. + * See the class documentation for a complete explanation of the description + * syntax. + * @param localizations a list of localizations for the rule set + * names in the description. These will be copied by the constructor. + * @param locale A locale that governs which characters are used for + * formatting values in numerals and which characters are equivalent in + * lenient parsing. + * @param perror The parse error if an error was encountered. + * @param status The status indicating whether the constructor succeeded. + * @stable ICU 3.2 + */ + RuleBasedNumberFormat(const UnicodeString& rules, const UnicodeString& localizations, + const Locale& locale, UParseError& perror, UErrorCode& status); + + /** + * Creates a RuleBasedNumberFormat from a predefined ruleset. The selector + * code chose among three possible predefined formats: spellout, ordinal, + * and duration. + * @param tag A selector code specifying which kind of formatter to create for that + * locale. There are four legal values: URBNF_SPELLOUT, which creates a formatter that + * spells out a value in words in the desired language, URBNF_ORDINAL, which attaches + * an ordinal suffix from the desired language to the end of a number (e.g. "123rd"), + * URBNF_DURATION, which formats a duration in seconds as hours, minutes, and seconds always rounding down, + * and URBNF_NUMBERING_SYSTEM, which is used to invoke rules for alternate numbering + * systems such as the Hebrew numbering system, or for Roman Numerals, etc. + * NOTE: If you use URBNF_NUMBERING_SYSTEM, you must also call setDefaultRuleSet() to + * specify the exact numbering system you want to use. If you want the default numbering system + * for the locale, call NumberFormat::createInstance() instead of creating a RuleBasedNumberFormat directly. + * @param locale The locale for the formatter. + * @param status The status indicating whether the constructor succeeded. + * @stable ICU 2.0 + */ + RuleBasedNumberFormat(URBNFRuleSetTag tag, const Locale& locale, UErrorCode& status); + + //----------------------------------------------------------------------- + // boilerplate + //----------------------------------------------------------------------- + + /** + * Copy constructor + * @param rhs the object to be copied from. + * @stable ICU 2.6 + */ + RuleBasedNumberFormat(const RuleBasedNumberFormat& rhs); + + /** + * Assignment operator + * @param rhs the object to be copied from. + * @stable ICU 2.6 + */ + RuleBasedNumberFormat& operator=(const RuleBasedNumberFormat& rhs); + + /** + * Release memory allocated for a RuleBasedNumberFormat when you are finished with it. + * @stable ICU 2.6 + */ + virtual ~RuleBasedNumberFormat(); + + /** + * Clone this object polymorphically. The caller is responsible + * for deleting the result when done. + * @return A copy of the object. + * @stable ICU 2.6 + */ + virtual RuleBasedNumberFormat* clone() const override; + + /** + * Return true if the given Format objects are semantically equal. + * Objects of different subclasses are considered unequal. + * @param other the object to be compared with. + * @return true if the given Format objects are semantically equal. + * @stable ICU 2.6 + */ + virtual bool operator==(const Format& other) const override; + +//----------------------------------------------------------------------- +// public API functions +//----------------------------------------------------------------------- + + /** + * return the rules that were provided to the RuleBasedNumberFormat. + * @return the result String that was passed in + * @stable ICU 2.0 + */ + virtual UnicodeString getRules() const; + + /** + * Return the number of public rule set names. + * @return the number of public rule set names. + * @stable ICU 2.0 + */ + virtual int32_t getNumberOfRuleSetNames() const; + + /** + * Return the name of the index'th public ruleSet. If index is not valid, + * the function returns null. + * @param index the index of the ruleset + * @return the name of the index'th public ruleSet. + * @stable ICU 2.0 + */ + virtual UnicodeString getRuleSetName(int32_t index) const; + + /** + * Return the number of locales for which we have localized rule set display names. + * @return the number of locales for which we have localized rule set display names. + * @stable ICU 3.2 + */ + virtual int32_t getNumberOfRuleSetDisplayNameLocales(void) const; + + /** + * Return the index'th display name locale. + * @param index the index of the locale + * @param status set to a failure code when this function fails + * @return the locale + * @see #getNumberOfRuleSetDisplayNameLocales + * @stable ICU 3.2 + */ + virtual Locale getRuleSetDisplayNameLocale(int32_t index, UErrorCode& status) const; + + /** + * Return the rule set display names for the provided locale. These are in the same order + * as those returned by getRuleSetName. The locale is matched against the locales for + * which there is display name data, using normal fallback rules. If no locale matches, + * the default display names are returned. (These are the internal rule set names minus + * the leading '%'.) + * @param index the index of the rule set + * @param locale the locale (returned by getRuleSetDisplayNameLocales) for which the localized + * display name is desired + * @return the display name for the given index, which might be bogus if there is an error + * @see #getRuleSetName + * @stable ICU 3.2 + */ + virtual UnicodeString getRuleSetDisplayName(int32_t index, + const Locale& locale = Locale::getDefault()); + + /** + * Return the rule set display name for the provided rule set and locale. + * The locale is matched against the locales for which there is display name data, using + * normal fallback rules. If no locale matches, the default display name is returned. + * @return the display name for the rule set + * @stable ICU 3.2 + * @see #getRuleSetDisplayName + */ + virtual UnicodeString getRuleSetDisplayName(const UnicodeString& ruleSetName, + const Locale& locale = Locale::getDefault()); + + + using NumberFormat::format; + + /** + * Formats the specified 32-bit number using the default ruleset. + * @param number The number to format. + * @param toAppendTo the string that will hold the (appended) result + * @param pos the fieldposition + * @return A textual representation of the number. + * @stable ICU 2.0 + */ + virtual UnicodeString& format(int32_t number, + UnicodeString& toAppendTo, + FieldPosition& pos) const override; + + /** + * Formats the specified 64-bit number using the default ruleset. + * @param number The number to format. + * @param toAppendTo the string that will hold the (appended) result + * @param pos the fieldposition + * @return A textual representation of the number. + * @stable ICU 2.1 + */ + virtual UnicodeString& format(int64_t number, + UnicodeString& toAppendTo, + FieldPosition& pos) const override; + /** + * Formats the specified number using the default ruleset. + * @param number The number to format. + * @param toAppendTo the string that will hold the (appended) result + * @param pos the fieldposition + * @return A textual representation of the number. + * @stable ICU 2.0 + */ + virtual UnicodeString& format(double number, + UnicodeString& toAppendTo, + FieldPosition& pos) const override; + + /** + * Formats the specified number using the named ruleset. + * @param number The number to format. + * @param ruleSetName The name of the rule set to format the number with. + * This must be the name of a valid public rule set for this formatter. + * @param toAppendTo the string that will hold the (appended) result + * @param pos the fieldposition + * @param status the status + * @return A textual representation of the number. + * @stable ICU 2.0 + */ + virtual UnicodeString& format(int32_t number, + const UnicodeString& ruleSetName, + UnicodeString& toAppendTo, + FieldPosition& pos, + UErrorCode& status) const; + /** + * Formats the specified 64-bit number using the named ruleset. + * @param number The number to format. + * @param ruleSetName The name of the rule set to format the number with. + * This must be the name of a valid public rule set for this formatter. + * @param toAppendTo the string that will hold the (appended) result + * @param pos the fieldposition + * @param status the status + * @return A textual representation of the number. + * @stable ICU 2.1 + */ + virtual UnicodeString& format(int64_t number, + const UnicodeString& ruleSetName, + UnicodeString& toAppendTo, + FieldPosition& pos, + UErrorCode& status) const; + /** + * Formats the specified number using the named ruleset. + * @param number The number to format. + * @param ruleSetName The name of the rule set to format the number with. + * This must be the name of a valid public rule set for this formatter. + * @param toAppendTo the string that will hold the (appended) result + * @param pos the fieldposition + * @param status the status + * @return A textual representation of the number. + * @stable ICU 2.0 + */ + virtual UnicodeString& format(double number, + const UnicodeString& ruleSetName, + UnicodeString& toAppendTo, + FieldPosition& pos, + UErrorCode& status) const; + +protected: + /** + * Format a decimal number. + * The number is a DigitList wrapper onto a floating point decimal number. + * The default implementation in NumberFormat converts the decimal number + * to a double and formats that. Subclasses of NumberFormat that want + * to specifically handle big decimal numbers must override this method. + * class DecimalFormat does so. + * + * @param number The number, a DigitList format Decimal Floating Point. + * @param appendTo Output parameter to receive result. + * Result is appended to existing contents. + * @param pos On input: an alignment field, if desired. + * On output: the offsets of the alignment field. + * @param status Output param filled with success/failure status. + * @return Reference to 'appendTo' parameter. + * @internal + */ + virtual UnicodeString& format(const number::impl::DecimalQuantity &number, + UnicodeString& appendTo, + FieldPosition& pos, + UErrorCode& status) const override; +public: + + using NumberFormat::parse; + + /** + * Parses the specified string, beginning at the specified position, according + * to this formatter's rules. This will match the string against all of the + * formatter's public rule sets and return the value corresponding to the longest + * parseable substring. This function's behavior is affected by the lenient + * parse mode. + * @param text The string to parse + * @param result the result of the parse, either a double or a long. + * @param parsePosition On entry, contains the position of the first character + * in "text" to examine. On exit, has been updated to contain the position + * of the first character in "text" that wasn't consumed by the parse. + * @see #setLenient + * @stable ICU 2.0 + */ + virtual void parse(const UnicodeString& text, + Formattable& result, + ParsePosition& parsePosition) const override; + +#if !UCONFIG_NO_COLLATION + + /** + * Turns lenient parse mode on and off. + * + * When in lenient parse mode, the formatter uses a Collator for parsing the text. + * Only primary differences are treated as significant. This means that case + * differences, accent differences, alternate spellings of the same letter + * (e.g., ae and a-umlaut in German), ignorable characters, etc. are ignored in + * matching the text. In many cases, numerals will be accepted in place of words + * or phrases as well. + * + * For example, all of the following will correctly parse as 255 in English in + * lenient-parse mode: + * <br>"two hundred fifty-five" + * <br>"two hundred fifty five" + * <br>"TWO HUNDRED FIFTY-FIVE" + * <br>"twohundredfiftyfive" + * <br>"2 hundred fifty-5" + * + * The Collator used is determined by the locale that was + * passed to this object on construction. The description passed to this object + * on construction may supply additional collation rules that are appended to the + * end of the default collator for the locale, enabling additional equivalences + * (such as adding more ignorable characters or permitting spelled-out version of + * symbols; see the demo program for examples). + * + * It's important to emphasize that even strict parsing is relatively lenient: it + * will accept some text that it won't produce as output. In English, for example, + * it will correctly parse "two hundred zero" and "fifteen hundred". + * + * @param enabled If true, turns lenient-parse mode on; if false, turns it off. + * @see RuleBasedCollator + * @stable ICU 2.0 + */ + virtual void setLenient(UBool enabled) override; + + /** + * Returns true if lenient-parse mode is turned on. Lenient parsing is off + * by default. + * @return true if lenient-parse mode is turned on. + * @see #setLenient + * @stable ICU 2.0 + */ + virtual inline UBool isLenient(void) const override; + +#endif + + /** + * Override the default rule set to use. If ruleSetName is null, reset + * to the initial default rule set. If the rule set is not a public rule set name, + * U_ILLEGAL_ARGUMENT_ERROR is returned in status. + * @param ruleSetName the name of the rule set, or null to reset the initial default. + * @param status set to failure code when a problem occurs. + * @stable ICU 2.6 + */ + virtual void setDefaultRuleSet(const UnicodeString& ruleSetName, UErrorCode& status); + + /** + * Return the name of the current default rule set. If the current rule set is + * not public, returns a bogus (and empty) UnicodeString. + * @return the name of the current default rule set + * @stable ICU 3.0 + */ + virtual UnicodeString getDefaultRuleSetName() const; + + /** + * Set a particular UDisplayContext value in the formatter, such as + * UDISPCTX_CAPITALIZATION_FOR_STANDALONE. Note: For getContext, see + * NumberFormat. + * @param value The UDisplayContext value to set. + * @param status Input/output status. If at entry this indicates a failure + * status, the function will do nothing; otherwise this will be + * updated with any new status from the function. + * @stable ICU 53 + */ + virtual void setContext(UDisplayContext value, UErrorCode& status) override; + + /** + * Get the rounding mode. + * @return A rounding mode + * @stable ICU 60 + */ + virtual ERoundingMode getRoundingMode(void) const override; + + /** + * Set the rounding mode. + * @param roundingMode A rounding mode + * @stable ICU 60 + */ + virtual void setRoundingMode(ERoundingMode roundingMode) override; + +public: + /** + * ICU "poor man's RTTI", returns a UClassID for this class. + * + * @stable ICU 2.8 + */ + static UClassID U_EXPORT2 getStaticClassID(void); + + /** + * ICU "poor man's RTTI", returns a UClassID for the actual class. + * + * @stable ICU 2.8 + */ + virtual UClassID getDynamicClassID(void) const override; + + /** + * Sets the decimal format symbols, which is generally not changed + * by the programmer or user. The formatter takes ownership of + * symbolsToAdopt; the client must not delete it. + * + * @param symbolsToAdopt DecimalFormatSymbols to be adopted. + * @stable ICU 49 + */ + virtual void adoptDecimalFormatSymbols(DecimalFormatSymbols* symbolsToAdopt); + + /** + * Sets the decimal format symbols, which is generally not changed + * by the programmer or user. A clone of the symbols is created and + * the symbols is _not_ adopted; the client is still responsible for + * deleting it. + * + * @param symbols DecimalFormatSymbols. + * @stable ICU 49 + */ + virtual void setDecimalFormatSymbols(const DecimalFormatSymbols& symbols); + +private: + RuleBasedNumberFormat() = delete; // default constructor not implemented + + // this will ref the localizations if they are not nullptr + // caller must deref to get adoption + RuleBasedNumberFormat(const UnicodeString& description, LocalizationInfo* localizations, + const Locale& locale, UParseError& perror, UErrorCode& status); + + void init(const UnicodeString& rules, LocalizationInfo* localizations, UParseError& perror, UErrorCode& status); + void initCapitalizationContextInfo(const Locale& thelocale); + void dispose(); + void stripWhitespace(UnicodeString& src); + void initDefaultRuleSet(); + NFRuleSet* findRuleSet(const UnicodeString& name, UErrorCode& status) const; + + /* friend access */ + friend class NFSubstitution; + friend class NFRule; + friend class NFRuleSet; + friend class FractionalPartSubstitution; + + inline NFRuleSet * getDefaultRuleSet() const; + const RuleBasedCollator * getCollator() const; + DecimalFormatSymbols * initializeDecimalFormatSymbols(UErrorCode &status); + const DecimalFormatSymbols * getDecimalFormatSymbols() const; + NFRule * initializeDefaultInfinityRule(UErrorCode &status); + const NFRule * getDefaultInfinityRule() const; + NFRule * initializeDefaultNaNRule(UErrorCode &status); + const NFRule * getDefaultNaNRule() const; + PluralFormat *createPluralFormat(UPluralType pluralType, const UnicodeString &pattern, UErrorCode& status) const; + UnicodeString& adjustForCapitalizationContext(int32_t startPos, UnicodeString& currentResult, UErrorCode& status) const; + UnicodeString& format(int64_t number, NFRuleSet *ruleSet, UnicodeString& toAppendTo, UErrorCode& status) const; + void format(double number, NFRuleSet& rs, UnicodeString& toAppendTo, UErrorCode& status) const; + +private: + NFRuleSet **fRuleSets; + UnicodeString* ruleSetDescriptions; + int32_t numRuleSets; + NFRuleSet *defaultRuleSet; + Locale locale; + RuleBasedCollator* collator; + DecimalFormatSymbols* decimalFormatSymbols; + NFRule *defaultInfinityRule; + NFRule *defaultNaNRule; + ERoundingMode fRoundingMode; + UBool lenient; + UnicodeString* lenientParseRules; + LocalizationInfo* localizations; + UnicodeString originalDescription; + UBool capitalizationInfoSet; + UBool capitalizationForUIListMenu; + UBool capitalizationForStandAlone; + BreakIterator* capitalizationBrkIter; +}; + +// --------------- + +#if !UCONFIG_NO_COLLATION + +inline UBool +RuleBasedNumberFormat::isLenient(void) const { + return lenient; +} + +#endif + +inline NFRuleSet* +RuleBasedNumberFormat::getDefaultRuleSet() const { + return defaultRuleSet; +} + +U_NAMESPACE_END + +/* U_HAVE_RBNF */ +#endif + +#endif /* U_SHOW_CPLUSPLUS_API */ + +/* RBNF_H */ +#endif |