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// © 2018 and later: Unicode, Inc. and others.
// License & terms of use: http://www.unicode.org/copyright.html
#ifndef __UNUMBERFORMATTER_H__
#define __UNUMBERFORMATTER_H__
#include "unicode/utypes.h"
#if !UCONFIG_NO_FORMATTING
#include "unicode/parseerr.h"
#include "unicode/ufieldpositer.h"
#include "unicode/umisc.h"
#include "unicode/uformattedvalue.h"
/**
* \file
* \brief C API: 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 resolve conflicts between maximum fraction digits and maximum
* significant digits.
*
* There are two modes, RELAXED and STRICT:
*
* - RELAXED: Relax one of the two constraints (fraction digits or significant digits) in order
* to round the number to a higher level of precision.
* - STRICT: Enforce both constraints, resulting in the number being rounded to a lower
* level of precision.
*
* The default settings for compact notation rounding are Max-Fraction = 0 (round to the nearest
* integer), Max-Significant = 2 (round to 2 significant digits), and priority RELAXED (choose
* the constraint that results in more digits being displayed).
*
* Conflicting *minimum* fraction and significant digits are always resolved in the direction that
* results in more trailing zeros.
*
* Example 1: Consider the number 3.141, with various different settings:
*
* - Max-Fraction = 1: "3.1"
* - Max-Significant = 3: "3.14"
*
* The rounding priority determines how to resolve the conflict when both Max-Fraction and
* Max-Significant are set. With RELAXED, the less-strict setting (the one that causes more digits
* to be displayed) will be used; Max-Significant wins. With STRICT, the more-strict setting (the
* one that causes fewer digits to be displayed) will be used; Max-Fraction wins.
*
* Example 2: Consider the number 8317, with various different settings:
*
* - Max-Fraction = 1: "8317"
* - Max-Significant = 3: "8320"
*
* Here, RELAXED favors Max-Fraction and STRICT favors Max-Significant. Note that this larger
* number caused the two modes to favor the opposite result.
*
* @stable ICU 69
*/
typedef enum UNumberRoundingPriority {
/**
* Favor greater precision by relaxing one of the rounding constraints.
*
* @stable ICU 69
*/
UNUM_ROUNDING_PRIORITY_RELAXED,
/**
* Favor adherence to all rounding constraints by producing lower precision.
*
* @stable ICU 69
*/
UNUM_ROUNDING_PRIORITY_STRICT,
} UNumberRoundingPriority;
/**
* 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 = 0,
/**
* 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 = 1,
/**
* 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 = 2,
/**
* 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 = 3,
/**
* Use the formal variant of the currency symbol; for example, "NT$" for the New Taiwan
* dollar in zh-TW.
*
* <p>
* Behavior of this option with non-currency units is not defined at this time.
*
* @stable ICU 68
*/
UNUM_UNIT_WIDTH_FORMAL = 4,
/**
* Use the alternate variant of the currency symbol; for example, "TL" for the Turkish
* lira (TRY).
*
* <p>
* Behavior of this option with non-currency units is not defined at this time.
*
* @stable ICU 68
*/
UNUM_UNIT_WIDTH_VARIANT = 5,
/**
* 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 = 6,
// Do not conditionalize the following with #ifndef U_HIDE_INTERNAL_API,
// needed for unconditionalized struct MacroProps
/**
* 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 = 7
} 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.
*
* If using this option, a sign will be displayed on negative zero, including negative numbers
* that round to zero. To hide the sign on negative zero, use the NEGATIVE option.
*
* @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, numbers that round to zero, or NaN.
*
* @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, numbers that round to zero, or NaN. For more
* information on the accounting format, see the ACCOUNTING sign display strategy.
*
* @stable ICU 61
*/
UNUM_SIGN_ACCOUNTING_EXCEPT_ZERO,
/**
* Same as AUTO, but do not show the sign on negative zero.
*
* @stable ICU 69
*/
UNUM_SIGN_NEGATIVE,
/**
* Same as ACCOUNTING, but do not show the sign on negative zero.
*
* @stable ICU 69
*/
UNUM_SIGN_ACCOUNTING_NEGATIVE,
// Do not conditionalize the following with #ifndef U_HIDE_INTERNAL_API,
// needed for unconditionalized struct MacroProps
/**
* One more than the highest UNumberSignDisplay value.
*
* @internal ICU 60: The numeric value may change over time; see ICU ticket #12420.
*/
UNUM_SIGN_COUNT = 9,
} 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,
// Do not conditionalize the following with #ifndef U_HIDE_INTERNAL_API,
// needed for unconditionalized struct MacroProps
/**
* 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;
/**
* An enum declaring how to render trailing zeros.
*
* - UNUM_TRAILING_ZERO_AUTO: 0.90, 1.00, 1.10
* - UNUM_TRAILING_ZERO_HIDE_IF_WHOLE: 0.90, 1, 1.10
*
* @stable ICU 69
*/
typedef enum UNumberTrailingZeroDisplay {
/**
* Display trailing zeros according to the settings for minimum fraction and significant digits.
*
* @stable ICU 69
*/
UNUM_TRAILING_ZERO_AUTO,
/**
* Same as AUTO, but hide trailing zeros after the decimal separator if they are all zero.
*
* @stable ICU 69
*/
UNUM_TRAILING_ZERO_HIDE_IF_WHOLE,
} UNumberTrailingZeroDisplay;
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.
*
* For more information on number skeleton strings, see:
* https://unicode-org.github.io/icu/userguide/format_parse/numbers/skeletons.html
*
* 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 if it is NUL-terminated.
* @param locale The NUL-terminated locale ID.
* @param ec Set if an error occurs.
* @stable ICU 62
*/
U_CAPI UNumberFormatter* U_EXPORT2
unumf_openForSkeletonAndLocale(const UChar* skeleton, int32_t skeletonLen, const char* locale,
UErrorCode* ec);
/**
* 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.
*
* For more information on number skeleton strings, see:
* https://unicode-org.github.io/icu/userguide/format_parse/numbers/skeletons.html
*
* @param skeleton The skeleton string, like u"percent precision-integer"
* @param skeletonLen The number of UChars in the skeleton string, or -1 if 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.
* @stable ICU 64
*/
U_CAPI UNumberFormatter* U_EXPORT2
unumf_openForSkeletonAndLocaleWithError(
const UChar* skeleton, int32_t skeletonLen, const char* locale, UParseError* perror, UErrorCode* ec);
/**
* 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_CAPI 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_CAPI 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_CAPI 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_CAPI void U_EXPORT2
unumf_formatDecimal(const UNumberFormatter* uformatter, const char* value, int32_t valueLen,
UFormattedNumber* uresult, UErrorCode* ec);
/**
* 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.
* @stable ICU 64
*/
U_CAPI const UFormattedValue* U_EXPORT2
unumf_resultAsValue(const UFormattedNumber* uresult, UErrorCode* ec);
/**
* 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_CAPI 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_CAPI 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_CAPI void U_EXPORT2
unumf_resultGetAllFieldPositions(const UFormattedNumber* uresult, UFieldPositionIterator* ufpositer,
UErrorCode* ec);
/**
* Extracts the formatted number as a "numeric string" conforming to the
* syntax defined in the Decimal Arithmetic Specification, available at
* http://speleotrove.com/decimal
*
* This endpoint is useful for obtaining the exact number being printed
* after scaling and rounding have been applied by the number formatter.
*
* @param uresult The input object containing the formatted number.
* @param dest the 8-bit char buffer into which the decimal number is placed
* @param destCapacity The size, in chars, of the destination buffer. May be zero
* for precomputing the required size.
* @param ec receives any error status.
* If U_BUFFER_OVERFLOW_ERROR: Returns number of chars for
* preflighting.
* @return Number of chars in the data. Does not include a trailing NUL.
* @stable ICU 68
*/
U_CAPI int32_t U_EXPORT2
unumf_resultToDecimalNumber(
const UFormattedNumber* uresult,
char* dest,
int32_t destCapacity,
UErrorCode* ec);
/**
* Releases the UNumberFormatter created by unumf_openForSkeletonAndLocale().
*
* @param uformatter An object created by unumf_openForSkeletonAndLocale().
* @stable ICU 62
*/
U_CAPI 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_CAPI 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 /* #if !UCONFIG_NO_FORMATTING */
#endif //__UNUMBERFORMATTER_H__
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