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// © 2016 and later: Unicode, Inc. and others.
// License & terms of use: http://www.unicode.org/copyright.html
/*
*****************************************************************************************
* Copyright (C) 2016, International Business Machines
* Corporation and others. All Rights Reserved.
*****************************************************************************************
*/
#ifndef URELDATEFMT_H
#define URELDATEFMT_H
#include "unicode/utypes.h"
#if !UCONFIG_NO_FORMATTING && !UCONFIG_NO_BREAK_ITERATION
#include "unicode/unum.h"
#include "unicode/udisplaycontext.h"
#include "unicode/localpointer.h"
#include "unicode/uformattedvalue.h"
/**
* \file
* \brief C API: URelativeDateTimeFormatter, relative date formatting of unit + numeric offset.
*
* Provides simple formatting of relative dates, in two ways
* <ul>
* <li>relative dates with a quantity e.g "in 5 days"</li>
* <li>relative dates without a quantity e.g "next Tuesday"</li>
* </ul>
* <p>
* This does not provide compound formatting for multiple units,
* other than the ability to combine a time string with a relative date,
* as in "next Tuesday at 3:45 PM". It also does not provide support
* for determining which unit to use, such as deciding between "in 7 days"
* and "in 1 week".
*
* @stable ICU 57
*/
/**
* The formatting style
* @stable ICU 54
*/
typedef enum UDateRelativeDateTimeFormatterStyle {
/**
* Everything spelled out.
* @stable ICU 54
*/
UDAT_STYLE_LONG,
/**
* Abbreviations used when possible.
* @stable ICU 54
*/
UDAT_STYLE_SHORT,
/**
* Use the shortest possible form.
* @stable ICU 54
*/
UDAT_STYLE_NARROW,
#ifndef U_HIDE_DEPRECATED_API
/**
* One more than the highest normal UDateRelativeDateTimeFormatterStyle value.
* @deprecated ICU 58 The numeric value may change over time, see ICU ticket #12420.
*/
UDAT_STYLE_COUNT
#endif /* U_HIDE_DEPRECATED_API */
} UDateRelativeDateTimeFormatterStyle;
/**
* Represents the unit for formatting a relative date. e.g "in 5 days"
* or "next year"
* @stable ICU 57
*/
typedef enum URelativeDateTimeUnit {
/**
* Specifies that relative unit is year, e.g. "last year",
* "in 5 years".
* @stable ICU 57
*/
UDAT_REL_UNIT_YEAR,
/**
* Specifies that relative unit is quarter, e.g. "last quarter",
* "in 5 quarters".
* @stable ICU 57
*/
UDAT_REL_UNIT_QUARTER,
/**
* Specifies that relative unit is month, e.g. "last month",
* "in 5 months".
* @stable ICU 57
*/
UDAT_REL_UNIT_MONTH,
/**
* Specifies that relative unit is week, e.g. "last week",
* "in 5 weeks".
* @stable ICU 57
*/
UDAT_REL_UNIT_WEEK,
/**
* Specifies that relative unit is day, e.g. "yesterday",
* "in 5 days".
* @stable ICU 57
*/
UDAT_REL_UNIT_DAY,
/**
* Specifies that relative unit is hour, e.g. "1 hour ago",
* "in 5 hours".
* @stable ICU 57
*/
UDAT_REL_UNIT_HOUR,
/**
* Specifies that relative unit is minute, e.g. "1 minute ago",
* "in 5 minutes".
* @stable ICU 57
*/
UDAT_REL_UNIT_MINUTE,
/**
* Specifies that relative unit is second, e.g. "1 second ago",
* "in 5 seconds".
* @stable ICU 57
*/
UDAT_REL_UNIT_SECOND,
/**
* Specifies that relative unit is Sunday, e.g. "last Sunday",
* "this Sunday", "next Sunday", "in 5 Sundays".
* @stable ICU 57
*/
UDAT_REL_UNIT_SUNDAY,
/**
* Specifies that relative unit is Monday, e.g. "last Monday",
* "this Monday", "next Monday", "in 5 Mondays".
* @stable ICU 57
*/
UDAT_REL_UNIT_MONDAY,
/**
* Specifies that relative unit is Tuesday, e.g. "last Tuesday",
* "this Tuesday", "next Tuesday", "in 5 Tuesdays".
* @stable ICU 57
*/
UDAT_REL_UNIT_TUESDAY,
/**
* Specifies that relative unit is Wednesday, e.g. "last Wednesday",
* "this Wednesday", "next Wednesday", "in 5 Wednesdays".
* @stable ICU 57
*/
UDAT_REL_UNIT_WEDNESDAY,
/**
* Specifies that relative unit is Thursday, e.g. "last Thursday",
* "this Thursday", "next Thursday", "in 5 Thursdays".
* @stable ICU 57
*/
UDAT_REL_UNIT_THURSDAY,
/**
* Specifies that relative unit is Friday, e.g. "last Friday",
* "this Friday", "next Friday", "in 5 Fridays".
* @stable ICU 57
*/
UDAT_REL_UNIT_FRIDAY,
/**
* Specifies that relative unit is Saturday, e.g. "last Saturday",
* "this Saturday", "next Saturday", "in 5 Saturdays".
* @stable ICU 57
*/
UDAT_REL_UNIT_SATURDAY,
#ifndef U_HIDE_DEPRECATED_API
/**
* One more than the highest normal URelativeDateTimeUnit value.
* @deprecated ICU 58 The numeric value may change over time, see ICU ticket #12420.
*/
UDAT_REL_UNIT_COUNT
#endif /* U_HIDE_DEPRECATED_API */
} URelativeDateTimeUnit;
#ifndef U_HIDE_DRAFT_API
/**
* FieldPosition and UFieldPosition selectors for format fields
* defined by RelativeDateTimeFormatter.
* @draft ICU 64
*/
typedef enum URelativeDateTimeFormatterField {
/**
* Represents a literal text string, like "tomorrow" or "days ago".
* @draft ICU 64
*/
UDAT_REL_LITERAL_FIELD,
/**
* Represents a number quantity, like "3" in "3 days ago".
* @draft ICU 64
*/
UDAT_REL_NUMERIC_FIELD,
} URelativeDateTimeFormatterField;
#endif // U_HIDE_DRAFT_API
/**
* Opaque URelativeDateTimeFormatter object for use in C programs.
* @stable ICU 57
*/
struct URelativeDateTimeFormatter;
typedef struct URelativeDateTimeFormatter URelativeDateTimeFormatter; /**< C typedef for struct URelativeDateTimeFormatter. @stable ICU 57 */
/**
* Open a new URelativeDateTimeFormatter object for a given locale using the
* specified width and capitalizationContext, along with a number formatter
* (if desired) to override the default formatter that would be used for
* display of numeric field offsets. The default formatter typically rounds
* toward 0 and has a minimum of 0 fraction digits and a maximum of 3
* fraction digits (i.e. it will show as many decimal places as necessary
* up to 3, without showing trailing 0s).
*
* @param locale
* The locale
* @param nfToAdopt
* A number formatter to set for this URelativeDateTimeFormatter
* object (instead of the default decimal formatter). Ownership of
* this UNumberFormat object will pass to the URelativeDateTimeFormatter
* object (the URelativeDateTimeFormatter adopts the UNumberFormat),
* which becomes responsible for closing it. If the caller wishes to
* retain ownership of the UNumberFormat object, the caller must clone
* it (with unum_clone) and pass the clone to ureldatefmt_open. May be
* NULL to use the default decimal formatter.
* @param width
* The width - wide, short, narrow, etc.
* @param capitalizationContext
* A value from UDisplayContext that pertains to capitalization, e.g.
* UDISPCTX_CAPITALIZATION_FOR_BEGINNING_OF_SENTENCE.
* @param status
* A pointer to a UErrorCode to receive any errors.
* @return
* A pointer to a URelativeDateTimeFormatter object for the specified locale,
* or NULL if an error occurred.
* @stable ICU 57
*/
U_STABLE URelativeDateTimeFormatter* U_EXPORT2
ureldatefmt_open( const char* locale,
UNumberFormat* nfToAdopt,
UDateRelativeDateTimeFormatterStyle width,
UDisplayContext capitalizationContext,
UErrorCode* status );
/**
* Close a URelativeDateTimeFormatter object. Once closed it may no longer be used.
* @param reldatefmt
* The URelativeDateTimeFormatter object to close.
* @stable ICU 57
*/
U_STABLE void U_EXPORT2
ureldatefmt_close(URelativeDateTimeFormatter *reldatefmt);
#ifndef U_HIDE_DRAFT_API
struct UFormattedRelativeDateTime;
/**
* Opaque struct to contain the results of a URelativeDateTimeFormatter operation.
* @draft ICU 64
*/
typedef struct UFormattedRelativeDateTime UFormattedRelativeDateTime;
/**
* Creates an object to hold the result of a URelativeDateTimeFormatter
* operation. The object can be used repeatedly; it is cleared whenever
* passed to a format function.
*
* @param ec Set if an error occurs.
* @return A pointer needing ownership.
* @draft ICU 64
*/
U_DRAFT UFormattedRelativeDateTime* U_EXPORT2
ureldatefmt_openResult(UErrorCode* ec);
/**
* Returns a representation of a UFormattedRelativeDateTime as a UFormattedValue,
* which can be subsequently passed to any API requiring that type.
*
* The returned object is owned by the UFormattedRelativeDateTime and is valid
* only as long as the UFormattedRelativeDateTime is present and unchanged in memory.
*
* You can think of this method as a cast between types.
*
* @param ufrdt 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
ureldatefmt_resultAsValue(const UFormattedRelativeDateTime* ufrdt, UErrorCode* ec);
/**
* Releases the UFormattedRelativeDateTime created by ureldatefmt_openResult.
*
* @param ufrdt The object to release.
* @draft ICU 64
*/
U_DRAFT void U_EXPORT2
ureldatefmt_closeResult(UFormattedRelativeDateTime* ufrdt);
#endif /* U_HIDE_DRAFT_API */
#if U_SHOW_CPLUSPLUS_API
U_NAMESPACE_BEGIN
/**
* \class LocalURelativeDateTimeFormatterPointer
* "Smart pointer" class, closes a URelativeDateTimeFormatter via ureldatefmt_close().
* For most methods see the LocalPointerBase base class.
*
* @see LocalPointerBase
* @see LocalPointer
* @stable ICU 57
*/
U_DEFINE_LOCAL_OPEN_POINTER(LocalURelativeDateTimeFormatterPointer, URelativeDateTimeFormatter, ureldatefmt_close);
#ifndef U_HIDE_DRAFT_API
/**
* \class LocalUFormattedRelativeDateTimePointer
* "Smart pointer" class, closes a UFormattedRelativeDateTime via ureldatefmt_closeResult().
* For most methods see the LocalPointerBase base class.
*
* @see LocalPointerBase
* @see LocalPointer
* @draft ICU 64
*/
U_DEFINE_LOCAL_OPEN_POINTER(LocalUFormattedRelativeDateTimePointer, UFormattedRelativeDateTime, ureldatefmt_closeResult);
#endif /* U_HIDE_DRAFT_API */
U_NAMESPACE_END
#endif
/**
* Format a combination of URelativeDateTimeUnit and numeric
* offset using a numeric style, e.g. "1 week ago", "in 1 week",
* "5 weeks ago", "in 5 weeks".
*
* @param reldatefmt
* The URelativeDateTimeFormatter object specifying the
* format conventions.
* @param offset
* The signed offset for the specified unit. This will
* be formatted according to this object's UNumberFormat
* object.
* @param unit
* The unit to use when formatting the relative
* date, e.g. UDAT_REL_UNIT_WEEK, UDAT_REL_UNIT_FRIDAY.
* @param result
* A pointer to a buffer to receive the formatted result.
* @param resultCapacity
* The maximum size of result.
* @param status
* A pointer to a UErrorCode to receive any errors. In
* case of error status, the contents of result are
* undefined.
* @return
* The length of the formatted result; may be greater
* than resultCapacity, in which case an error is returned.
* @stable ICU 57
*/
U_STABLE int32_t U_EXPORT2
ureldatefmt_formatNumeric( const URelativeDateTimeFormatter* reldatefmt,
double offset,
URelativeDateTimeUnit unit,
UChar* result,
int32_t resultCapacity,
UErrorCode* status);
#ifndef U_HIDE_DRAFT_API
/**
* Format a combination of URelativeDateTimeUnit and numeric
* offset using a numeric style, e.g. "1 week ago", "in 1 week",
* "5 weeks ago", "in 5 weeks".
*
* @param reldatefmt
* The URelativeDateTimeFormatter object specifying the
* format conventions.
* @param offset
* The signed offset for the specified unit. This will
* be formatted according to this object's UNumberFormat
* object.
* @param unit
* The unit to use when formatting the relative
* date, e.g. UDAT_REL_UNIT_WEEK, UDAT_REL_UNIT_FRIDAY.
* @param result
* A pointer to a UFormattedRelativeDateTime to populate.
* @param status
* A pointer to a UErrorCode to receive any errors. In
* case of error status, the contents of result are
* undefined.
* @draft ICU 64
*/
U_DRAFT void U_EXPORT2
ureldatefmt_formatNumericToResult(
const URelativeDateTimeFormatter* reldatefmt,
double offset,
URelativeDateTimeUnit unit,
UFormattedRelativeDateTime* result,
UErrorCode* status);
#endif /* U_HIDE_DRAFT_API */
/**
* Format a combination of URelativeDateTimeUnit and numeric offset
* using a text style if possible, e.g. "last week", "this week",
* "next week", "yesterday", "tomorrow". Falls back to numeric
* style if no appropriate text term is available for the specified
* offset in the object's locale.
*
* @param reldatefmt
* The URelativeDateTimeFormatter object specifying the
* format conventions.
* @param offset
* The signed offset for the specified unit.
* @param unit
* The unit to use when formatting the relative
* date, e.g. UDAT_REL_UNIT_WEEK, UDAT_REL_UNIT_FRIDAY.
* @param result
* A pointer to a buffer to receive the formatted result.
* @param resultCapacity
* The maximum size of result.
* @param status
* A pointer to a UErrorCode to receive any errors. In
* case of error status, the contents of result are
* undefined.
* @return
* The length of the formatted result; may be greater
* than resultCapacity, in which case an error is returned.
* @stable ICU 57
*/
U_STABLE int32_t U_EXPORT2
ureldatefmt_format( const URelativeDateTimeFormatter* reldatefmt,
double offset,
URelativeDateTimeUnit unit,
UChar* result,
int32_t resultCapacity,
UErrorCode* status);
#ifndef U_HIDE_DRAFT_API
/**
* Format a combination of URelativeDateTimeUnit and numeric offset
* using a text style if possible, e.g. "last week", "this week",
* "next week", "yesterday", "tomorrow". Falls back to numeric
* style if no appropriate text term is available for the specified
* offset in the object's locale.
*
* This method populates a UFormattedRelativeDateTime, which exposes more
* information than the string populated by format().
*
* @param reldatefmt
* The URelativeDateTimeFormatter object specifying the
* format conventions.
* @param offset
* The signed offset for the specified unit.
* @param unit
* The unit to use when formatting the relative
* date, e.g. UDAT_REL_UNIT_WEEK, UDAT_REL_UNIT_FRIDAY.
* @param result
* A pointer to a UFormattedRelativeDateTime to populate.
* @param status
* A pointer to a UErrorCode to receive any errors. In
* case of error status, the contents of result are
* undefined.
* @draft ICU 64
*/
U_DRAFT void U_EXPORT2
ureldatefmt_formatToResult(
const URelativeDateTimeFormatter* reldatefmt,
double offset,
URelativeDateTimeUnit unit,
UFormattedRelativeDateTime* result,
UErrorCode* status);
#endif /* U_HIDE_DRAFT_API */
/**
* Combines a relative date string and a time string in this object's
* locale. This is done with the same date-time separator used for the
* default calendar in this locale to produce a result such as
* "yesterday at 3:45 PM".
*
* @param reldatefmt
* The URelativeDateTimeFormatter object specifying the format conventions.
* @param relativeDateString
* The relative date string.
* @param relativeDateStringLen
* The length of relativeDateString; may be -1 if relativeDateString
* is zero-terminated.
* @param timeString
* The time string.
* @param timeStringLen
* The length of timeString; may be -1 if timeString is zero-terminated.
* @param result
* A pointer to a buffer to receive the formatted result.
* @param resultCapacity
* The maximum size of result.
* @param status
* A pointer to a UErrorCode to receive any errors. In case of error status,
* the contents of result are undefined.
* @return
* The length of the formatted result; may be greater than resultCapacity,
* in which case an error is returned.
* @stable ICU 57
*/
U_STABLE int32_t U_EXPORT2
ureldatefmt_combineDateAndTime( const URelativeDateTimeFormatter* reldatefmt,
const UChar * relativeDateString,
int32_t relativeDateStringLen,
const UChar * timeString,
int32_t timeStringLen,
UChar* result,
int32_t resultCapacity,
UErrorCode* status );
#endif /* !UCONFIG_NO_FORMATTING && !UCONFIG_NO_BREAK_ITERATION */
#endif
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