name : unumberformatter.h // © 2018 and later: Unicode, Inc. and others. // License & terms of use: http://www.unicode.org/copyright.html #include "unicode/utypes.h" #if !UCONFIG_NO_FORMATTING #ifndef __UNUMBERFORMATTER_H__ #define __UNUMBERFORMATTER_H__ #include "unicode/parseerr.h" #include "unicode/ufieldpositer.h" #include "unicode/umisc.h" #include "unicode/uformattedvalue.h" /** * \file * \brief C-compatible API for localized number formatting; not recommended for C++. * * This is the C-compatible version of the NumberFormatter API introduced in ICU 60. C++ users should * include unicode/numberformatter.h and use the proper C++ APIs. * * The C API accepts a number skeleton string for specifying the settings for formatting, which covers a * very large subset of all possible number formatting features. For more information on number skeleton * strings, see unicode/numberformatter.h. * * When using UNumberFormatter, which is treated as immutable, the results are exported to a mutable * UFormattedNumber object, which you subsequently use for populating your string buffer or iterating over * the fields. * * Example code: * <pre> * // Setup: * UErrorCode ec = U_ZERO_ERROR; * UNumberFormatter* uformatter = unumf_openForSkeletonAndLocale(u"precision-integer", -1, "en", &ec); * UFormattedNumber* uresult = unumf_openResult(&ec); * if (U_FAILURE(ec)) { return; } * * // Format a double: * unumf_formatDouble(uformatter, 5142.3, uresult, &ec); * if (U_FAILURE(ec)) { return; } * * // Export the string to a malloc'd buffer: * int32_t len = unumf_resultToString(uresult, NULL, 0, &ec); * // at this point, ec == U_BUFFER_OVERFLOW_ERROR * ec = U_ZERO_ERROR; * UChar* buffer = (UChar*) malloc((len+1)*sizeof(UChar)); * unumf_resultToString(uresult, buffer, len+1, &ec); * if (U_FAILURE(ec)) { return; } * // buffer should equal "5,142" * * // Cleanup: * unumf_close(uformatter); * unumf_closeResult(uresult); * free(buffer); * </pre> * * If you are a C++ user linking against the C libraries, you can use the LocalPointer versions of these * APIs. The following example uses LocalPointer with the decimal number and field position APIs: * * <pre> * // Setup: * LocalUNumberFormatterPointer uformatter(unumf_openForSkeletonAndLocale(u"percent", -1, "en", &ec)); * LocalUFormattedNumberPointer uresult(unumf_openResult(&ec)); * if (U_FAILURE(ec)) { return; } * * // Format a decimal number: * unumf_formatDecimal(uformatter.getAlias(), "9.87E-3", -1, uresult.getAlias(), &ec); * if (U_FAILURE(ec)) { return; } * * // Get the location of the percent sign: * UFieldPosition ufpos = {UNUM_PERCENT_FIELD, 0, 0}; * unumf_resultNextFieldPosition(uresult.getAlias(), &ufpos, &ec); * // ufpos should contain beginIndex=7 and endIndex=8 since the string is "0.00987%" * * // No need to do any cleanup since we are using LocalPointer. * </pre> */ /** * An enum declaring how to render units, including currencies. Example outputs when formatting 123 USD and 123 * meters in <em>en-CA</em>: * * <p> * <ul> * <li>NARROW*: "$123.00" and "123 m" * <li>SHORT: "US$ 123.00" and "123 m" * <li>FULL_NAME: "123.00 US dollars" and "123 meters" * <li>ISO_CODE: "USD 123.00" and undefined behavior * <li>HIDDEN: "123.00" and "123" * </ul> * * <p> * This enum is similar to {@link UMeasureFormatWidth}. * * @stable ICU 60 */ typedef enum UNumberUnitWidth { /** * Print an abbreviated version of the unit name. Similar to SHORT, but always use the shortest available * abbreviation or symbol. This option can be used when the context hints at the identity of the unit. For more * information on the difference between NARROW and SHORT, see SHORT. * * <p> * In CLDR, this option corresponds to the "Narrow" format for measure units and the "¤¤¤¤¤" placeholder for * currencies. * * @stable ICU 60 */ UNUM_UNIT_WIDTH_NARROW, /** * Print an abbreviated version of the unit name. Similar to NARROW, but use a slightly wider abbreviation or * symbol when there may be ambiguity. This is the default behavior. * * <p> * For example, in <em>es-US</em>, the SHORT form for Fahrenheit is "{0} °F", but the NARROW form is "{0}°", * since Fahrenheit is the customary unit for temperature in that locale. * * <p> * In CLDR, this option corresponds to the "Short" format for measure units and the "¤" placeholder for * currencies. * * @stable ICU 60 */ UNUM_UNIT_WIDTH_SHORT, /** * Print the full name of the unit, without any abbreviations. * * <p> * In CLDR, this option corresponds to the default format for measure units and the "¤¤¤" placeholder for * currencies. * * @stable ICU 60 */ UNUM_UNIT_WIDTH_FULL_NAME, /** * Use the three-digit ISO XXX code in place of the symbol for displaying currencies. The behavior of this * option is currently undefined for use with measure units. * * <p> * In CLDR, this option corresponds to the "¤¤" placeholder for currencies. * * @stable ICU 60 */ UNUM_UNIT_WIDTH_ISO_CODE, /** * Format the number according to the specified unit, but do not display the unit. For currencies, apply * monetary symbols and formats as with SHORT, but omit the currency symbol. For measure units, the behavior is * equivalent to not specifying the unit at all. * * @stable ICU 60 */ UNUM_UNIT_WIDTH_HIDDEN, /** * One more than the highest UNumberUnitWidth value. * * @internal ICU 60: The numeric value may change over time; see ICU ticket #12420. */ UNUM_UNIT_WIDTH_COUNT } UNumberUnitWidth; /** * An enum declaring the strategy for when and how to display grouping separators (i.e., the * separator, often a comma or period, after every 2-3 powers of ten). The choices are several * pre-built strategies for different use cases that employ locale data whenever possible. Example * outputs for 1234 and 1234567 in <em>en-IN</em>: * * <ul> * <li>OFF: 1234 and 12345 * <li>MIN2: 1234 and 12,34,567 * <li>AUTO: 1,234 and 12,34,567 * <li>ON_ALIGNED: 1,234 and 12,34,567 * <li>THOUSANDS: 1,234 and 1,234,567 * </ul> * * <p> * The default is AUTO, which displays grouping separators unless the locale data says that grouping * is not customary. To force grouping for all numbers greater than 1000 consistently across locales, * use ON_ALIGNED. On the other hand, to display grouping less frequently than the default, use MIN2 * or OFF. See the docs of each option for details. * * <p> * Note: This enum specifies the strategy for grouping sizes. To set which character to use as the * grouping separator, use the "symbols" setter. * * @stable ICU 63 */ typedef enum UNumberGroupingStrategy { /** * Do not display grouping separators in any locale. * * @stable ICU 61 */ UNUM_GROUPING_OFF, /** * Display grouping using locale defaults, except do not show grouping on values smaller than * 10000 (such that there is a <em>minimum of two digits</em> before the first separator). * * <p> * Note that locales may restrict grouping separators to be displayed only on 1 million or * greater (for example, ee and hu) or disable grouping altogether (for example, bg currency). * * <p> * Locale data is used to determine whether to separate larger numbers into groups of 2 * (customary in South Asia) or groups of 3 (customary in Europe and the Americas). * * @stable ICU 61 */ UNUM_GROUPING_MIN2, /** * Display grouping using the default strategy for all locales. This is the default behavior. * * <p> * Note that locales may restrict grouping separators to be displayed only on 1 million or * greater (for example, ee and hu) or disable grouping altogether (for example, bg currency). * * <p> * Locale data is used to determine whether to separate larger numbers into groups of 2 * (customary in South Asia) or groups of 3 (customary in Europe and the Americas). * * @stable ICU 61 */ UNUM_GROUPING_AUTO, /** * Always display the grouping separator on values of at least 1000. * * <p> * This option ignores the locale data that restricts or disables grouping, described in MIN2 and * AUTO. This option may be useful to normalize the alignment of numbers, such as in a * spreadsheet. * * <p> * Locale data is used to determine whether to separate larger numbers into groups of 2 * (customary in South Asia) or groups of 3 (customary in Europe and the Americas). * * @stable ICU 61 */ UNUM_GROUPING_ON_ALIGNED, /** * Use the Western defaults: groups of 3 and enabled for all numbers 1000 or greater. Do not use * locale data for determining the grouping strategy. * * @stable ICU 61 */ UNUM_GROUPING_THOUSANDS #ifndef U_HIDE_INTERNAL_API , /** * One more than the highest UNumberGroupingStrategy value. * * @internal ICU 62: The numeric value may change over time; see ICU ticket #12420. */ UNUM_GROUPING_COUNT #endif /* U_HIDE_INTERNAL_API */ } UNumberGroupingStrategy; /** * An enum declaring how to denote positive and negative numbers. Example outputs when formatting * 123, 0, and -123 in <em>en-US</em>: * * <ul> * <li>AUTO: "123", "0", and "-123" * <li>ALWAYS: "+123", "+0", and "-123" * <li>NEVER: "123", "0", and "123" * <li>ACCOUNTING: "$123", "$0", and "($123)" * <li>ACCOUNTING_ALWAYS: "+$123", "+$0", and "($123)" * <li>EXCEPT_ZERO: "+123", "0", and "-123" * <li>ACCOUNTING_EXCEPT_ZERO: "+$123", "$0", and "($123)" * </ul> * * <p> * The exact format, including the position and the code point of the sign, differ by locale. * * @stable ICU 60 */ typedef enum UNumberSignDisplay { /** * Show the minus sign on negative numbers, and do not show the sign on positive numbers. This is the default * behavior. * * @stable ICU 60 */ UNUM_SIGN_AUTO, /** * Show the minus sign on negative numbers and the plus sign on positive numbers, including zero. * To hide the sign on zero, see {@link UNUM_SIGN_EXCEPT_ZERO}. * * @stable ICU 60 */ UNUM_SIGN_ALWAYS, /** * Do not show the sign on positive or negative numbers. * * @stable ICU 60 */ UNUM_SIGN_NEVER, /** * Use the locale-dependent accounting format on negative numbers, and do not show the sign on positive numbers. * * <p> * The accounting format is defined in CLDR and varies by locale; in many Western locales, the format is a pair * of parentheses around the number. * * <p> * Note: Since CLDR defines the accounting format in the monetary context only, this option falls back to the * AUTO sign display strategy when formatting without a currency unit. This limitation may be lifted in the * future. * * @stable ICU 60 */ UNUM_SIGN_ACCOUNTING, /** * Use the locale-dependent accounting format on negative numbers, and show the plus sign on * positive numbers, including zero. For more information on the accounting format, see the * ACCOUNTING sign display strategy. To hide the sign on zero, see * {@link UNUM_SIGN_ACCOUNTING_EXCEPT_ZERO}. * * @stable ICU 60 */ UNUM_SIGN_ACCOUNTING_ALWAYS, /** * Show the minus sign on negative numbers and the plus sign on positive numbers. Do not show a * sign on zero or NaN, unless the sign bit is set (-0.0 gets a sign). * * @stable ICU 61 */ UNUM_SIGN_EXCEPT_ZERO, /** * Use the locale-dependent accounting format on negative numbers, and show the plus sign on * positive numbers. Do not show a sign on zero or NaN, unless the sign bit is set (-0.0 gets a * sign). For more information on the accounting format, see the ACCOUNTING sign display * strategy. * * @stable ICU 61 */ UNUM_SIGN_ACCOUNTING_EXCEPT_ZERO, /** * One more than the highest UNumberSignDisplay value. * * @internal ICU 60: The numeric value may change over time; see ICU ticket #12420. */ UNUM_SIGN_COUNT } UNumberSignDisplay; /** * An enum declaring how to render the decimal separator. * * <p> * <ul> * <li>UNUM_DECIMAL_SEPARATOR_AUTO: "1", "1.1" * <li>UNUM_DECIMAL_SEPARATOR_ALWAYS: "1.", "1.1" * </ul> * * @stable ICU 60 */ typedef enum UNumberDecimalSeparatorDisplay { /** * Show the decimal separator when there are one or more digits to display after the separator, and do not show * it otherwise. This is the default behavior. * * @stable ICU 60 */ UNUM_DECIMAL_SEPARATOR_AUTO, /** * Always show the decimal separator, even if there are no digits to display after the separator. * * @stable ICU 60 */ UNUM_DECIMAL_SEPARATOR_ALWAYS, /** * One more than the highest UNumberDecimalSeparatorDisplay value. * * @internal ICU 60: The numeric value may change over time; see ICU ticket #12420. */ UNUM_DECIMAL_SEPARATOR_COUNT } UNumberDecimalSeparatorDisplay; struct UNumberFormatter; /** * C-compatible version of icu::number::LocalizedNumberFormatter. * * NOTE: This is a C-compatible API; C++ users should build against numberformatter.h instead. * * @stable ICU 62 */ typedef struct UNumberFormatter UNumberFormatter; struct UFormattedNumber; /** * C-compatible version of icu::number::FormattedNumber. * * NOTE: This is a C-compatible API; C++ users should build against numberformatter.h instead. * * @stable ICU 62 */ typedef struct UFormattedNumber UFormattedNumber; /** * Creates a new UNumberFormatter for the given skeleton string and locale. This is currently the only * method for creating a new UNumberFormatter. * * Objects of type UNumberFormatter returned by this method are threadsafe. * * For more details on skeleton strings, see the documentation in numberformatter.h. For more details on * the usage of this API, see the documentation at the top of unumberformatter.h. * * NOTE: This is a C-compatible API; C++ users should build against numberformatter.h instead. * * @param skeleton The skeleton string, like u"percent precision-integer" * @param skeletonLen The number of UChars in the skeleton string, or -1 it it is NUL-terminated. * @param locale The NUL-terminated locale ID. * @param ec Set if an error occurs. * @stable ICU 62 */ U_STABLE UNumberFormatter* U_EXPORT2 unumf_openForSkeletonAndLocale(const UChar* skeleton, int32_t skeletonLen, const char* locale, UErrorCode* ec); #ifndef U_HIDE_DRAFT_API /** * Like unumf_openForSkeletonAndLocale, but accepts a UParseError, which will be populated with the * location of a skeleton syntax error if such a syntax error exists. * * @param skeleton The skeleton string, like u"percent precision-integer" * @param skeletonLen The number of UChars in the skeleton string, or -1 it it is NUL-terminated. * @param locale The NUL-terminated locale ID. * @param perror A parse error struct populated if an error occurs when parsing. Can be NULL. * If no error occurs, perror->offset will be set to -1. * @param ec Set if an error occurs. * @draft ICU 64 */ U_DRAFT UNumberFormatter* U_EXPORT2 unumf_openForSkeletonAndLocaleWithError( const UChar* skeleton, int32_t skeletonLen, const char* locale, UParseError* perror, UErrorCode* ec); #endif // U_HIDE_DRAFT_API /** * Creates an object to hold the result of a UNumberFormatter * operation. The object can be used repeatedly; it is cleared whenever * passed to a format function. * * @param ec Set if an error occurs. * @stable ICU 62 */ U_STABLE UFormattedNumber* U_EXPORT2 unumf_openResult(UErrorCode* ec); /** * Uses a UNumberFormatter to format an integer to a UFormattedNumber. A string, field position, and other * information can be retrieved from the UFormattedNumber. * * The UNumberFormatter can be shared between threads. Each thread should have its own local * UFormattedNumber, however, for storing the result of the formatting operation. * * NOTE: This is a C-compatible API; C++ users should build against numberformatter.h instead. * * @param uformatter A formatter object created by unumf_openForSkeletonAndLocale or similar. * @param value The number to be formatted. * @param uresult The object that will be mutated to store the result; see unumf_openResult. * @param ec Set if an error occurs. * @stable ICU 62 */ U_STABLE void U_EXPORT2 unumf_formatInt(const UNumberFormatter* uformatter, int64_t value, UFormattedNumber* uresult, UErrorCode* ec); /** * Uses a UNumberFormatter to format a double to a UFormattedNumber. A string, field position, and other * information can be retrieved from the UFormattedNumber. * * The UNumberFormatter can be shared between threads. Each thread should have its own local * UFormattedNumber, however, for storing the result of the formatting operation. * * NOTE: This is a C-compatible API; C++ users should build against numberformatter.h instead. * * @param uformatter A formatter object created by unumf_openForSkeletonAndLocale or similar. * @param value The number to be formatted. * @param uresult The object that will be mutated to store the result; see unumf_openResult. * @param ec Set if an error occurs. * @stable ICU 62 */ U_STABLE void U_EXPORT2 unumf_formatDouble(const UNumberFormatter* uformatter, double value, UFormattedNumber* uresult, UErrorCode* ec); /** * Uses a UNumberFormatter to format a decimal number to a UFormattedNumber. A string, field position, and * other information can be retrieved from the UFormattedNumber. * * The UNumberFormatter can be shared between threads. Each thread should have its own local * UFormattedNumber, however, for storing the result of the formatting operation. * * The syntax of the unformatted number is a "numeric string" as defined in the Decimal Arithmetic * Specification, available at http://speleotrove.com/decimal * * NOTE: This is a C-compatible API; C++ users should build against numberformatter.h instead. * * @param uformatter A formatter object created by unumf_openForSkeletonAndLocale or similar. * @param value The numeric string to be formatted. * @param valueLen The length of the numeric string, or -1 if it is NUL-terminated. * @param uresult The object that will be mutated to store the result; see unumf_openResult. * @param ec Set if an error occurs. * @stable ICU 62 */ U_STABLE void U_EXPORT2 unumf_formatDecimal(const UNumberFormatter* uformatter, const char* value, int32_t valueLen, UFormattedNumber* uresult, UErrorCode* ec); #ifndef U_HIDE_DRAFT_API /** * Returns a representation of a UFormattedNumber as a UFormattedValue, * which can be subsequently passed to any API requiring that type. * * The returned object is owned by the UFormattedNumber and is valid * only as long as the UFormattedNumber is present and unchanged in memory. * * You can think of this method as a cast between types. * * @param uresult The object containing the formatted string. * @param ec Set if an error occurs. * @return A UFormattedValue owned by the input object. * @draft ICU 64 */ U_DRAFT const UFormattedValue* U_EXPORT2 unumf_resultAsValue(const UFormattedNumber* uresult, UErrorCode* ec); #endif /* U_HIDE_DRAFT_API */ /** * Extracts the result number string out of a UFormattedNumber to a UChar buffer if possible. * If bufferCapacity is greater than the required length, a terminating NUL is written. * If bufferCapacity is less than the required length, an error code is set. * * Also see ufmtval_getString, which returns a NUL-terminated string: * * int32_t len; * const UChar* str = ufmtval_getString(unumf_resultAsValue(uresult, &ec), &len, &ec); * * NOTE: This is a C-compatible API; C++ users should build against numberformatter.h instead. * * @param uresult The object containing the formatted number. * @param buffer Where to save the string output. * @param bufferCapacity The number of UChars available in the buffer. * @param ec Set if an error occurs. * @return The required length. * @stable ICU 62 */ U_STABLE int32_t U_EXPORT2 unumf_resultToString(const UFormattedNumber* uresult, UChar* buffer, int32_t bufferCapacity, UErrorCode* ec); /** * Determines the start and end indices of the next occurrence of the given <em>field</em> in the * output string. This allows you to determine the locations of, for example, the integer part, * fraction part, or symbols. * * This is a simpler but less powerful alternative to {@link ufmtval_nextPosition}. * * If a field occurs just once, calling this method will find that occurrence and return it. If a * field occurs multiple times, this method may be called repeatedly with the following pattern: * * <pre> * UFieldPosition ufpos = {UNUM_GROUPING_SEPARATOR_FIELD, 0, 0}; * while (unumf_resultNextFieldPosition(uresult, ufpos, &ec)) { * // do something with ufpos. * } * </pre> * * This method is useful if you know which field to query. If you want all available field position * information, use unumf_resultGetAllFieldPositions(). * * NOTE: All fields of the UFieldPosition must be initialized before calling this method. * * @param uresult The object containing the formatted number. * @param ufpos * Input+output variable. On input, the "field" property determines which field to look up, * and the "endIndex" property determines where to begin the search. On output, the * "beginIndex" field is set to the beginning of the first occurrence of the field after the * input "endIndex", and "endIndex" is set to the end of that occurrence of the field * (exclusive index). If a field position is not found, the FieldPosition is not changed and * the method returns FALSE. * @param ec Set if an error occurs. * @stable ICU 62 */ U_STABLE UBool U_EXPORT2 unumf_resultNextFieldPosition(const UFormattedNumber* uresult, UFieldPosition* ufpos, UErrorCode* ec); /** * Populates the given iterator with all fields in the formatted output string. This allows you to * determine the locations of the integer part, fraction part, and sign. * * This is an alternative to the more powerful {@link ufmtval_nextPosition} API. * * If you need information on only one field, use {@link ufmtval_nextPosition} or * {@link unumf_resultNextFieldPosition}. * * @param uresult The object containing the formatted number. * @param ufpositer * A pointer to a UFieldPositionIterator created by {@link #ufieldpositer_open}. Iteration * information already present in the UFieldPositionIterator is deleted, and the iterator is reset * to apply to the fields in the formatted string created by this function call. The field values * and indexes returned by {@link #ufieldpositer_next} represent fields denoted by * the UNumberFormatFields enum. Fields are not returned in a guaranteed order. Fields cannot * overlap, but they may nest. For example, 1234 could format as "1,234" which might consist of a * grouping separator field for ',' and an integer field encompassing the entire string. * @param ec Set if an error occurs. * @stable ICU 62 */ U_STABLE void U_EXPORT2 unumf_resultGetAllFieldPositions(const UFormattedNumber* uresult, UFieldPositionIterator* ufpositer, UErrorCode* ec); // TODO(ICU-20775): Propose this as API. // NOTE: This is not currently implemented. // U_DRAFT int32_t U_EXPORT2 // unumf_resultToDecimalNumber(const UFormattedNumber* uresult, char* buffer, int32_t bufferCapacity, // UErrorCode* ec); /** * Releases the UNumberFormatter created by unumf_openForSkeletonAndLocale(). * * @param uformatter An object created by unumf_openForSkeletonAndLocale(). * @stable ICU 62 */ U_STABLE void U_EXPORT2 unumf_close(UNumberFormatter* uformatter); /** * Releases the UFormattedNumber created by unumf_openResult(). * * @param uresult An object created by unumf_openResult(). * @stable ICU 62 */ U_STABLE void U_EXPORT2 unumf_closeResult(UFormattedNumber* uresult); #if U_SHOW_CPLUSPLUS_API U_NAMESPACE_BEGIN /** * \class LocalUNumberFormatterPointer * "Smart pointer" class; closes a UNumberFormatter via unumf_close(). * For most methods see the LocalPointerBase base class. * * Usage: * <pre> * LocalUNumberFormatterPointer uformatter(unumf_openForSkeletonAndLocale(...)); * // no need to explicitly call unumf_close() * </pre> * * @see LocalPointerBase * @see LocalPointer * @stable ICU 62 */ U_DEFINE_LOCAL_OPEN_POINTER(LocalUNumberFormatterPointer, UNumberFormatter, unumf_close); /** * \class LocalUFormattedNumberPointer * "Smart pointer" class; closes a UFormattedNumber via unumf_closeResult(). * For most methods see the LocalPointerBase base class. * * Usage: * <pre> * LocalUFormattedNumberPointer uformatter(unumf_openResult(...)); * // no need to explicitly call unumf_closeResult() * </pre> * * @see LocalPointerBase * @see LocalPointer * @stable ICU 62 */ U_DEFINE_LOCAL_OPEN_POINTER(LocalUFormattedNumberPointer, UFormattedNumber, unumf_closeResult); U_NAMESPACE_END #endif // U_SHOW_CPLUSPLUS_API #endif //__UNUMBERFORMATTER_H__ #endif /* #if !UCONFIG_NO_FORMATTING */