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// © 2020 and later: Unicode, Inc. and others.
// License & terms of use: http://www.unicode.org/copyright.html
#ifndef __UNUMBERRANGEFORMATTER_H__
#define __UNUMBERRANGEFORMATTER_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"
#include "unicode/uformattable.h"
/**
* \file
* \brief C API: Localized number range formatting
*
* This is the C-compatible version of the NumberRangeFormatter API. C++ users
* should include unicode/numberrangeformatter.h and use the proper C++ APIs.
*
* First create a UNumberRangeFormatter, which is immutable, and then format to
* a UFormattedNumberRange.
*
* Example code:
* <pre>
* // Setup:
* UErrorCode ec = U_ZERO_ERROR;
* UNumberRangeFormatter* uformatter = unumrf_openForSkeletonCollapseIdentityFallbackAndLocaleWithError(
* u"currency/USD precision-integer",
* -1,
* UNUM_RANGE_COLLAPSE_AUTO,
* UNUM_IDENTITY_FALLBACK_APPROXIMATELY,
* "en-US",
* NULL,
* &ec);
* UFormattedNumberRange* uresult = unumrf_openResult(&ec);
* if (U_FAILURE(ec)) { return; }
*
* // Format a double range:
* unumrf_formatDoubleRange(uformatter, 3.0, 5.0, uresult, &ec);
* if (U_FAILURE(ec)) { return; }
*
* // Get the result string:
* int32_t len;
* const UChar* str = ufmtval_getString(unumrf_resultAsValue(uresult, &ec), &len, &ec);
* if (U_FAILURE(ec)) { return; }
* // str should equal "$3 – $5"
*
* // Cleanup:
* unumf_close(uformatter);
* unumf_closeResult(uresult);
* </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:
* LocalUNumberRangeFormatterPointer uformatter(
* unumrf_openForSkeletonCollapseIdentityFallbackAndLocaleWithError(...));
* LocalUFormattedNumberRangePointer uresult(unumrf_openResult(&ec));
* if (U_FAILURE(ec)) { return; }
*
* // Format a double number range:
* unumrf_formatDoubleRange(uformatter.getAlias(), 3.0, 5.0, uresult.getAlias(), &ec);
* if (U_FAILURE(ec)) { return; }
*
* // No need to do any cleanup since we are using LocalPointer.
* </pre>
*
* You can also get field positions. For more information, see uformattedvalue.h.
*/
/**
* Defines how to merge fields that are identical across the range sign.
*
* @stable ICU 63
*/
typedef enum UNumberRangeCollapse {
/**
* Use locale data and heuristics to determine how much of the string to collapse. Could end up collapsing none,
* some, or all repeated pieces in a locale-sensitive way.
*
* The heuristics used for this option are subject to change over time.
*
* @stable ICU 63
*/
UNUM_RANGE_COLLAPSE_AUTO,
/**
* Do not collapse any part of the number. Example: "3.2 thousand kilograms – 5.3 thousand kilograms"
*
* @stable ICU 63
*/
UNUM_RANGE_COLLAPSE_NONE,
/**
* Collapse the unit part of the number, but not the notation, if present. Example: "3.2 thousand – 5.3 thousand
* kilograms"
*
* @stable ICU 63
*/
UNUM_RANGE_COLLAPSE_UNIT,
/**
* Collapse any field that is equal across the range sign. May introduce ambiguity on the magnitude of the
* number. Example: "3.2 – 5.3 thousand kilograms"
*
* @stable ICU 63
*/
UNUM_RANGE_COLLAPSE_ALL
} UNumberRangeCollapse;
/**
* Defines the behavior when the two numbers in the range are identical after rounding. To programmatically detect
* when the identity fallback is used, compare the lower and upper BigDecimals via FormattedNumber.
*
* @stable ICU 63
* @see NumberRangeFormatter
*/
typedef enum UNumberRangeIdentityFallback {
/**
* Show the number as a single value rather than a range. Example: "$5"
*
* @stable ICU 63
*/
UNUM_IDENTITY_FALLBACK_SINGLE_VALUE,
/**
* Show the number using a locale-sensitive approximation pattern. If the numbers were the same before rounding,
* show the single value. Example: "~$5" or "$5"
*
* @stable ICU 63
*/
UNUM_IDENTITY_FALLBACK_APPROXIMATELY_OR_SINGLE_VALUE,
/**
* Show the number using a locale-sensitive approximation pattern. Use the range pattern always, even if the
* inputs are the same. Example: "~$5"
*
* @stable ICU 63
*/
UNUM_IDENTITY_FALLBACK_APPROXIMATELY,
/**
* Show the number as the range of two equal values. Use the range pattern always, even if the inputs are the
* same. Example (with RangeCollapse.NONE): "$5 – $5"
*
* @stable ICU 63
*/
UNUM_IDENTITY_FALLBACK_RANGE
} UNumberRangeIdentityFallback;
/**
* Used in the result class FormattedNumberRange to indicate to the user whether the numbers formatted in the range
* were equal or not, and whether or not the identity fallback was applied.
*
* @stable ICU 63
* @see NumberRangeFormatter
*/
typedef enum UNumberRangeIdentityResult {
/**
* Used to indicate that the two numbers in the range were equal, even before any rounding rules were applied.
*
* @stable ICU 63
* @see NumberRangeFormatter
*/
UNUM_IDENTITY_RESULT_EQUAL_BEFORE_ROUNDING,
/**
* Used to indicate that the two numbers in the range were equal, but only after rounding rules were applied.
*
* @stable ICU 63
* @see NumberRangeFormatter
*/
UNUM_IDENTITY_RESULT_EQUAL_AFTER_ROUNDING,
/**
* Used to indicate that the two numbers in the range were not equal, even after rounding rules were applied.
*
* @stable ICU 63
* @see NumberRangeFormatter
*/
UNUM_IDENTITY_RESULT_NOT_EQUAL,
#ifndef U_HIDE_INTERNAL_API
/**
* The number of entries in this enum.
* @internal
*/
UNUM_IDENTITY_RESULT_COUNT
#endif /* U_HIDE_INTERNAL_API */
} UNumberRangeIdentityResult;
struct UNumberRangeFormatter;
/**
* C-compatible version of icu::number::LocalizedNumberRangeFormatter.
*
* NOTE: This is a C-compatible API; C++ users should build against numberrangeformatter.h instead.
*
* @stable ICU 68
*/
typedef struct UNumberRangeFormatter UNumberRangeFormatter;
struct UFormattedNumberRange;
/**
* C-compatible version of icu::number::FormattedNumberRange.
*
* NOTE: This is a C-compatible API; C++ users should build against numberrangeformatter.h instead.
*
* @stable ICU 68
*/
typedef struct UFormattedNumberRange UFormattedNumberRange;
/**
* Creates a new UNumberFormatter for the given skeleton string, collapse option, identity fallback
* option, and locale. This is currently the only method for creating a new UNumberRangeFormatter.
*
* Objects of type UNumberRangeFormatter returned by this method are threadsafe.
*
* For more details on skeleton strings, see the documentation in numberrangeformatter.h. For more
* details on the usage of this API, see the documentation at the top of unumberrangeformatter.h.
*
* NOTE: This is a C-compatible API; C++ users should build against numberrangeformatter.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 collapse Option for how to merge affixes (if unsure, use UNUM_RANGE_COLLAPSE_AUTO)
* @param identityFallback Option for resolving when both sides of the range are equal.
* @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 68
*/
U_CAPI UNumberRangeFormatter* U_EXPORT2
unumrf_openForSkeletonWithCollapseAndIdentityFallback(
const UChar* skeleton,
int32_t skeletonLen,
UNumberRangeCollapse collapse,
UNumberRangeIdentityFallback identityFallback,
const char* locale,
UParseError* perror,
UErrorCode* ec);
/**
* Creates an object to hold the result of a UNumberRangeFormatter
* 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 68
*/
U_CAPI UFormattedNumberRange* U_EXPORT2
unumrf_openResult(UErrorCode* ec);
/**
* Uses a UNumberRangeFormatter to format a range of doubles.
*
* The UNumberRangeFormatter can be shared between threads. Each thread should have its own local
* UFormattedNumberRange, however, for storing the result of the formatting operation.
*
* NOTE: This is a C-compatible API; C++ users should build against numberrangeformatter.h instead.
*
* @param uformatter A formatter object; see unumberrangeformatter.h.
* @param first The first (usually smaller) number in the range.
* @param second The second (usually larger) number in the range.
* @param uresult The object that will be mutated to store the result; see unumrf_openResult.
* @param ec Set if an error occurs.
* @stable ICU 68
*/
U_CAPI void U_EXPORT2
unumrf_formatDoubleRange(
const UNumberRangeFormatter* uformatter,
double first,
double second,
UFormattedNumberRange* uresult,
UErrorCode* ec);
/**
* Uses a UNumberRangeFormatter to format a range of decimal numbers.
*
* With a decimal number string, you can specify an input with arbitrary precision.
*
* The UNumberRangeFormatter can be shared between threads. Each thread should have its own local
* UFormattedNumberRange, however, for storing the result of the formatting operation.
*
* NOTE: This is a C-compatible API; C++ users should build against numberrangeformatter.h instead.
*
* @param uformatter A formatter object; see unumberrangeformatter.h.
* @param first The first (usually smaller) number in the range.
* @param firstLen The length of the first decimal number string.
* @param second The second (usually larger) number in the range.
* @param secondLen The length of the second decimal number string.
* @param uresult The object that will be mutated to store the result; see unumrf_openResult.
* @param ec Set if an error occurs.
* @stable ICU 68
*/
U_CAPI void U_EXPORT2
unumrf_formatDecimalRange(
const UNumberRangeFormatter* uformatter,
const char* first,
int32_t firstLen,
const char* second,
int32_t secondLen,
UFormattedNumberRange* uresult,
UErrorCode* ec);
/**
* Returns a representation of a UFormattedNumberRange as a UFormattedValue,
* which can be subsequently passed to any API requiring that type.
*
* The returned object is owned by the UFormattedNumberRange 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 number range.
* @param ec Set if an error occurs.
* @return A UFormattedValue owned by the input object.
* @stable ICU 68
*/
U_CAPI const UFormattedValue* U_EXPORT2
unumrf_resultAsValue(const UFormattedNumberRange* uresult, UErrorCode* ec);
/**
* Extracts the identity result from a UFormattedNumberRange.
*
* NOTE: This is a C-compatible API; C++ users should build against numberformatter.h instead.
*
* @param uresult The object containing the formatted number range.
* @param ec Set if an error occurs.
* @return The identity result; see UNumberRangeIdentityResult.
* @stable ICU 68
*/
U_CAPI UNumberRangeIdentityResult U_EXPORT2
unumrf_resultGetIdentityResult(
const UFormattedNumberRange* uresult,
UErrorCode* ec);
/**
* Extracts the first formatted number as a decimal number. This endpoint
* is useful for obtaining the exact number being printed after scaling
* and rounding have been applied by the number range formatting pipeline.
*
* The syntax of the unformatted number is a "numeric string"
* as defined in the Decimal Arithmetic Specification, available at
* http://speleotrove.com/decimal
*
* @param uresult The input object containing the formatted number range.
* @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
unumrf_resultGetFirstDecimalNumber(
const UFormattedNumberRange* uresult,
char* dest,
int32_t destCapacity,
UErrorCode* ec);
/**
* Extracts the second formatted number as a decimal number. This endpoint
* is useful for obtaining the exact number being printed after scaling
* and rounding have been applied by the number range formatting pipeline.
*
* The syntax of the unformatted number is a "numeric string"
* as defined in the Decimal Arithmetic Specification, available at
* http://speleotrove.com/decimal
*
* @param uresult The input object containing the formatted number range.
* @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
unumrf_resultGetSecondDecimalNumber(
const UFormattedNumberRange* 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 68
*/
U_CAPI void U_EXPORT2
unumrf_close(UNumberRangeFormatter* uformatter);
/**
* Releases the UFormattedNumber created by unumf_openResult().
*
* @param uresult An object created by unumf_openResult().
* @stable ICU 68
*/
U_CAPI void U_EXPORT2
unumrf_closeResult(UFormattedNumberRange* uresult);
#if U_SHOW_CPLUSPLUS_API
U_NAMESPACE_BEGIN
/**
* \class LocalUNumberRangeFormatterPointer
* "Smart pointer" class; closes a UNumberFormatter via unumf_close().
* For most methods see the LocalPointerBase base class.
*
* Usage:
* <pre>
* LocalUNumberRangeFormatterPointer uformatter(
* unumrf_openForSkeletonCollapseIdentityFallbackAndLocaleWithError(...));
* // no need to explicitly call unumrf_close()
* </pre>
*
* @see LocalPointerBase
* @see LocalPointer
* @stable ICU 68
*/
U_DEFINE_LOCAL_OPEN_POINTER(LocalUNumberRangeFormatterPointer, UNumberRangeFormatter, unumrf_close);
/**
* \class LocalUFormattedNumberPointer
* "Smart pointer" class; closes a UFormattedNumber via unumf_closeResult().
* For most methods see the LocalPointerBase base class.
*
* Usage:
* <pre>
* LocalUFormattedNumberRangePointer uresult(unumrf_openResult(...));
* // no need to explicitly call unumrf_closeResult()
* </pre>
*
* @see LocalPointerBase
* @see LocalPointer
* @stable ICU 68
*/
U_DEFINE_LOCAL_OPEN_POINTER(LocalUFormattedNumberRangePointer, UFormattedNumberRange, unumrf_closeResult);
U_NAMESPACE_END
#endif // U_SHOW_CPLUSPLUS_API
#endif /* #if !UCONFIG_NO_FORMATTING */
#endif //__UNUMBERRANGEFORMATTER_H__
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