// © 2016 and later: Unicode, Inc. and others.
// License & terms of use: http://www.unicode.org/copyright.html
/*
*****************************************************************************************
* Copyright (C) 2010-2012,2015 International Business Machines
* Corporation and others. All Rights Reserved.
*****************************************************************************************
*/
#ifndef UDATEINTERVALFORMAT_H
#define UDATEINTERVALFORMAT_H
#include "unicode/utypes.h"
#if !UCONFIG_NO_FORMATTING
#include "unicode/umisc.h"
#include "unicode/localpointer.h"
#include "unicode/uformattedvalue.h"
/**
* \file
* \brief C API: Format a date interval.
*
* A UDateIntervalFormat is used to format the range between two UDate values
* in a locale-sensitive way, using a skeleton that specifies the precision and
* completeness of the information to show. If the range smaller than the resolution
* specified by the skeleton, a single date format will be produced. If the range
* is larger than the format specified by the skeleton, a locale-specific fallback
* will be used to format the items missing from the skeleton.
*
* For example, if the range is 2010-03-04 07:56 - 2010-03-04 19:56 (12 hours)
* - The skeleton jm will produce
* for en_US, "7:56 AM - 7:56 PM"
* for en_GB, "7:56 - 19:56"
* - The skeleton MMMd will produce
* for en_US, "Mar 4"
* for en_GB, "4 Mar"
* If the range is 2010-03-04 07:56 - 2010-03-08 16:11 (4 days, 8 hours, 15 minutes)
* - The skeleton jm will produce
* for en_US, "3/4/2010 7:56 AM - 3/8/2010 4:11 PM"
* for en_GB, "4/3/2010 7:56 - 8/3/2010 16:11"
* - The skeleton MMMd will produce
* for en_US, "Mar 4-8"
* for en_GB, "4-8 Mar"
*
* Note: the "-" characters in the above sample output will actually be
* Unicode 2013, EN_DASH, in all but the last example.
*
* Note, in ICU 4.4 the standard skeletons for which date interval format data
* is usually available are as follows; best results will be obtained by using
* skeletons from this set, or those formed by combining these standard skeletons
* (note that for these skeletons, the length of digit field such as d, y, or
* M vs MM is irrelevant (but for non-digit fields such as MMM vs MMMM it is
* relevant). Note that a skeleton involving h or H generally explicitly requests
* that time style (12- or 24-hour time respectively). For a skeleton that
* requests the locale's default time style (h or H), use 'j' instead of h or H.
* h, H, hm, Hm,
* hv, Hv, hmv, Hmv,
* d,
* M, MMM, MMMM,
* Md, MMMd,
* MEd, MMMEd,
* y,
* yM, yMMM, yMMMM,
* yMd, yMMMd,
* yMEd, yMMMEd
*
* Locales for which ICU 4.4 seems to have a reasonable amount of this data
* include:
* af, am, ar, be, bg, bn, ca, cs, da, de (_AT), el, en (_AU,_CA,_GB,_IE,_IN...),
* eo, es (_AR,_CL,_CO,...,_US) et, fa, fi, fo, fr (_BE,_CH,_CA), fur, gsw, he,
* hr, hu, hy, is, it (_CH), ja, kk, km, ko, lt, lv, mk, ml, mt, nb, nl )_BE),
* nn, pl, pt (_PT), rm, ro, ru (_UA), sk, sl, so, sq, sr, sr_Latn, sv, th, to,
* tr, uk, ur, vi, zh (_SG), zh_Hant (_HK,_MO)
*/
/**
* Opaque UDateIntervalFormat object for use in C programs.
* @stable ICU 4.8
*/
struct UDateIntervalFormat;
typedef struct UDateIntervalFormat UDateIntervalFormat; /**< C typedef for struct UDateIntervalFormat. @stable ICU 4.8 */
#ifndef U_HIDE_DRAFT_API
struct UFormattedDateInterval;
/**
* Opaque struct to contain the results of a UDateIntervalFormat operation.
* @draft ICU 64
*/
typedef struct UFormattedDateInterval UFormattedDateInterval;
#endif /* U_HIDE_DRAFT_API */
/**
* Open a new UDateIntervalFormat object using the predefined rules for a
* given locale plus a specified skeleton.
* @param locale
* The locale for whose rules should be used; may be NULL for
* default locale.
* @param skeleton
* A pattern containing only the fields desired for the interval
* format, for example "Hm", "yMMMd", or "yMMMEdHm".
* @param skeletonLength
* The length of skeleton; may be -1 if the skeleton is zero-terminated.
* @param tzID
* A timezone ID specifying the timezone to use. If 0, use the default
* timezone.
* @param tzIDLength
* The length of tzID, or -1 if null-terminated. If 0, use the default
* timezone.
* @param status
* A pointer to a UErrorCode to receive any errors.
* @return
* A pointer to a UDateIntervalFormat object for the specified locale,
* or NULL if an error occurred.
* @stable ICU 4.8
*/
U_STABLE UDateIntervalFormat* U_EXPORT2
udtitvfmt_open(const char* locale,
const UChar* skeleton,
int32_t skeletonLength,
const UChar* tzID,
int32_t tzIDLength,
UErrorCode* status);
/**
* Close a UDateIntervalFormat object. Once closed it may no longer be used.
* @param formatter
* The UDateIntervalFormat object to close.
* @stable ICU 4.8
*/
U_STABLE void U_EXPORT2
udtitvfmt_close(UDateIntervalFormat *formatter);
#ifndef U_HIDE_DRAFT_API
/**
* Creates an object to hold the result of a UDateIntervalFormat
* 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_CAPI UFormattedDateInterval* U_EXPORT2
udtitvfmt_openResult(UErrorCode* ec);
/**
* Returns a representation of a UFormattedDateInterval as a UFormattedValue,
* which can be subsequently passed to any API requiring that type.
*
* The returned object is owned by the UFormattedDateInterval and is valid
* only as long as the UFormattedDateInterval is present and unchanged in memory.
*
* You can think of this method as a cast between types.
*
* When calling ufmtval_nextPosition():
* The fields are returned from left to right. The special field category
* UFIELD_CATEGORY_DATE_INTERVAL_SPAN is used to indicate which datetime
* primitives came from which arguments: 0 means fromCalendar, and 1 means
* toCalendar. The span category will always occur before the
* corresponding fields in UFIELD_CATEGORY_DATE
* in the ufmtval_nextPosition() iterator.
*
* @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_CAPI const UFormattedValue* U_EXPORT2
udtitvfmt_resultAsValue(const UFormattedDateInterval* uresult, UErrorCode* ec);
/**
* Releases the UFormattedDateInterval created by udtitvfmt_openResult().
*
* @param uresult The object to release.
* @draft ICU 64
*/
U_CAPI void U_EXPORT2
udtitvfmt_closeResult(UFormattedDateInterval* uresult);
#endif /* U_HIDE_DRAFT_API */
#if U_SHOW_CPLUSPLUS_API
U_NAMESPACE_BEGIN
/**
* \class LocalUDateIntervalFormatPointer
* "Smart pointer" class, closes a UDateIntervalFormat via udtitvfmt_close().
* For most methods see the LocalPointerBase base class.
*
* @see LocalPointerBase
* @see LocalPointer
* @stable ICU 4.8
*/
U_DEFINE_LOCAL_OPEN_POINTER(LocalUDateIntervalFormatPointer, UDateIntervalFormat, udtitvfmt_close);
#ifndef U_HIDE_DRAFT_API
/**
* \class LocalUFormattedDateIntervalPointer
* "Smart pointer" class, closes a UFormattedDateInterval via udtitvfmt_close().
* For most methods see the LocalPointerBase base class.
*
* @see LocalPointerBase
* @see LocalPointer
* @draft ICU 64
*/
U_DEFINE_LOCAL_OPEN_POINTER(LocalUFormattedDateIntervalPointer, UFormattedDateInterval, udtitvfmt_closeResult);
#endif /* U_HIDE_DRAFT_API */
U_NAMESPACE_END
#endif
/**
* Formats a date/time range using the conventions established for the
* UDateIntervalFormat object.
* @param formatter
* The UDateIntervalFormat object specifying the format conventions.
* @param fromDate
* The starting point of the range.
* @param toDate
* The ending point of the range.
* @param result
* A pointer to a buffer to receive the formatted range.
* @param resultCapacity
* The maximum size of result.
* @param position
* A pointer to a UFieldPosition. On input, position->field is read.
* On output, position->beginIndex and position->endIndex indicate
* the beginning and ending indices of field number position->field,
* if such a field exists. This parameter may be NULL, in which case
* no field position data is returned.
* There may be multiple instances of a given field type in an
* interval format; in this case the position indices refer to the
* first instance.
* @param status
* A pointer to a UErrorCode to receive any errors.
* @return
* The total buffer size needed; if greater than resultLength, the
* output was truncated.
* @stable ICU 4.8
*/
U_STABLE int32_t U_EXPORT2
udtitvfmt_format(const UDateIntervalFormat* formatter,
UDate fromDate,
UDate toDate,
UChar* result,
int32_t resultCapacity,
UFieldPosition* position,
UErrorCode* status);
#ifndef U_HIDE_DRAFT_API
/**
* Formats a date/time range using the conventions established for the
* UDateIntervalFormat object.
* @param formatter
* The UDateIntervalFormat object specifying the format conventions.
* @param result
* The UFormattedDateInterval to contain the result of the
* formatting operation.
* @param fromDate
* The starting point of the range.
* @param toDate
* The ending point of the range.
* @param status
* A pointer to a UErrorCode to receive any errors.
* @draft ICU 64
*/
U_DRAFT void U_EXPORT2
udtitvfmt_formatToResult(
const UDateIntervalFormat* formatter,
UFormattedDateInterval* result,
UDate fromDate,
UDate toDate,
UErrorCode* status);
#endif /* U_HIDE_DRAFT_API */
#endif /* #if !UCONFIG_NO_FORMATTING */
#endif
