472 lines
18 KiB
C
472 lines
18 KiB
C
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/*
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*******************************************************************************
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*
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* Copyright (C) 2007-2009, International Business Machines
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* Corporation and others. All Rights Reserved.
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*
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*******************************************************************************
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* file name: udatpg.h
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* encoding: US-ASCII
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* tab size: 8 (not used)
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* indentation:4
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*
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* created on: 2007jul30
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* created by: Markus W. Scherer
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*/
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#ifndef __UDATPG_H__
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#define __UDATPG_H__
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#include "unicode/utypes.h"
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#include "unicode/uenum.h"
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/**
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* \file
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* \brief C API: Wrapper for DateTimePatternGenerator (unicode/dtptngen.h).
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*
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* UDateTimePatternGenerator provides flexible generation of date format patterns,
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* like "yy-MM-dd". The user can build up the generator by adding successive
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* patterns. Once that is done, a query can be made using a "skeleton", which is
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* a pattern which just includes the desired fields and lengths. The generator
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* will return the "best fit" pattern corresponding to that skeleton.
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* <p>The main method people will use is udatpg_getBestPattern, since normally
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* UDateTimePatternGenerator is pre-built with data from a particular locale.
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* However, generators can be built directly from other data as well.
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* <p><i>Issue: may be useful to also have a function that returns the list of
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* fields in a pattern, in order, since we have that internally.
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* That would be useful for getting the UI order of field elements.</i>
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*/
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/**
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* Opaque type for a date/time pattern generator object.
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* @stable ICU 3.8
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*/
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typedef void *UDateTimePatternGenerator;
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/**
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* Field number constants for udatpg_getAppendItemFormats() and similar functions.
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* These constants are separate from UDateFormatField despite semantic overlap
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* because some fields are merged for the date/time pattern generator.
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* @stable ICU 3.8
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*/
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typedef enum UDateTimePatternField {
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/** @stable ICU 3.8 */
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UDATPG_ERA_FIELD,
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/** @stable ICU 3.8 */
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UDATPG_YEAR_FIELD,
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/** @stable ICU 3.8 */
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UDATPG_QUARTER_FIELD,
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/** @stable ICU 3.8 */
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UDATPG_MONTH_FIELD,
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/** @stable ICU 3.8 */
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UDATPG_WEEK_OF_YEAR_FIELD,
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/** @stable ICU 3.8 */
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UDATPG_WEEK_OF_MONTH_FIELD,
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/** @stable ICU 3.8 */
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UDATPG_WEEKDAY_FIELD,
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/** @stable ICU 3.8 */
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UDATPG_DAY_OF_YEAR_FIELD,
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/** @stable ICU 3.8 */
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UDATPG_DAY_OF_WEEK_IN_MONTH_FIELD,
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/** @stable ICU 3.8 */
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UDATPG_DAY_FIELD,
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/** @stable ICU 3.8 */
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UDATPG_DAYPERIOD_FIELD,
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/** @stable ICU 3.8 */
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UDATPG_HOUR_FIELD,
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/** @stable ICU 3.8 */
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UDATPG_MINUTE_FIELD,
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/** @stable ICU 3.8 */
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UDATPG_SECOND_FIELD,
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/** @stable ICU 3.8 */
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UDATPG_FRACTIONAL_SECOND_FIELD,
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/** @stable ICU 3.8 */
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UDATPG_ZONE_FIELD,
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/** @stable ICU 3.8 */
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UDATPG_FIELD_COUNT
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} UDateTimePatternField;
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/**
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* Status return values from udatpg_addPattern().
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* @stable ICU 3.8
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*/
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typedef enum UDateTimePatternConflict {
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/** @stable ICU 3.8 */
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UDATPG_NO_CONFLICT,
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/** @stable ICU 3.8 */
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UDATPG_BASE_CONFLICT,
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/** @stable ICU 3.8 */
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UDATPG_CONFLICT,
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/** @stable ICU 3.8 */
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UDATPG_CONFLICT_COUNT
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} UDateTimePatternConflict;
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/**
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* Open a generator according to a given locale.
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* @param locale
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* @param pErrorCode a pointer to the UErrorCode which must not indicate a
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* failure before the function call.
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* @return a pointer to UDateTimePatternGenerator.
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* @stable ICU 3.8
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*/
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U_DRAFT UDateTimePatternGenerator * U_EXPORT2
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udatpg_open(const char *locale, UErrorCode *pErrorCode);
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/**
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* Open an empty generator, to be constructed with udatpg_addPattern(...) etc.
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* @param pErrorCode a pointer to the UErrorCode which must not indicate a
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* failure before the function call.
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* @return a pointer to UDateTimePatternGenerator.
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* @stable ICU 3.8
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*/
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U_DRAFT UDateTimePatternGenerator * U_EXPORT2
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udatpg_openEmpty(UErrorCode *pErrorCode);
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/**
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* Close a generator.
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* @param dtpg a pointer to UDateTimePatternGenerator.
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* @stable ICU 3.8
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*/
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U_DRAFT void U_EXPORT2
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udatpg_close(UDateTimePatternGenerator *dtpg);
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/**
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* Create a copy pf a generator.
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* @param dtpg a pointer to UDateTimePatternGenerator to be copied.
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* @param pErrorCode a pointer to the UErrorCode which must not indicate a
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* failure before the function call.
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* @return a pointer to a new UDateTimePatternGenerator.
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* @stable ICU 3.8
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*/
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U_DRAFT UDateTimePatternGenerator * U_EXPORT2
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udatpg_clone(const UDateTimePatternGenerator *dtpg, UErrorCode *pErrorCode);
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/**
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* Get the best pattern matching the input skeleton. It is guaranteed to
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* have all of the fields in the skeleton.
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*
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* Note that this function uses a non-const UDateTimePatternGenerator:
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* It uses a stateful pattern parser which is set up for each generator object,
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* rather than creating one for each function call.
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* Consecutive calls to this function do not affect each other,
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* but this function cannot be used concurrently on a single generator object.
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*
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* @param dtpg a pointer to UDateTimePatternGenerator.
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* @param skeleton
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* The skeleton is a pattern containing only the variable fields.
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* For example, "MMMdd" and "mmhh" are skeletons.
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* @param length the length of skeleton
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* @param bestPattern
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* The best pattern found from the given skeleton.
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* @param capacity the capacity of bestPattern.
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* @param pErrorCode a pointer to the UErrorCode which must not indicate a
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* failure before the function call.
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* @return the length of bestPattern.
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* @stable ICU 3.8
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*/
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U_DRAFT int32_t U_EXPORT2
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udatpg_getBestPattern(UDateTimePatternGenerator *dtpg,
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const UChar *skeleton, int32_t length,
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UChar *bestPattern, int32_t capacity,
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UErrorCode *pErrorCode);
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/**
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* Get a unique skeleton from a given pattern. For example,
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* both "MMM-dd" and "dd/MMM" produce the skeleton "MMMdd".
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*
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* Note that this function uses a non-const UDateTimePatternGenerator:
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* It uses a stateful pattern parser which is set up for each generator object,
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* rather than creating one for each function call.
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* Consecutive calls to this function do not affect each other,
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* but this function cannot be used concurrently on a single generator object.
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*
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* @param dtpg a pointer to UDateTimePatternGenerator.
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* @param pattern input pattern, such as "dd/MMM".
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* @param length the length of pattern.
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* @param skeleton such as "MMMdd"
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* @param capacity the capacity of skeleton.
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* @param pErrorCode a pointer to the UErrorCode which must not indicate a
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* failure before the function call.
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* @return the length of skeleton.
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* @stable ICU 3.8
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*/
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U_DRAFT int32_t U_EXPORT2
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udatpg_getSkeleton(UDateTimePatternGenerator *dtpg,
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const UChar *pattern, int32_t length,
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UChar *skeleton, int32_t capacity,
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UErrorCode *pErrorCode);
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/**
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* Get a unique base skeleton from a given pattern. This is the same
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* as the skeleton, except that differences in length are minimized so
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* as to only preserve the difference between string and numeric form. So
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* for example, both "MMM-dd" and "d/MMM" produce the skeleton "MMMd"
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* (notice the single d).
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*
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* Note that this function uses a non-const UDateTimePatternGenerator:
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* It uses a stateful pattern parser which is set up for each generator object,
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* rather than creating one for each function call.
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* Consecutive calls to this function do not affect each other,
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* but this function cannot be used concurrently on a single generator object.
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*
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* @param dtpg a pointer to UDateTimePatternGenerator.
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* @param pattern input pattern, such as "dd/MMM".
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* @param length the length of pattern.
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* @param baseSkeleton such as "Md"
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* @param capacity the capacity of base skeleton.
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* @param pErrorCode a pointer to the UErrorCode which must not indicate a
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* failure before the function call.
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* @return the length of baseSkeleton.
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* @stable ICU 3.8
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*/
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U_DRAFT int32_t U_EXPORT2
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udatpg_getBaseSkeleton(UDateTimePatternGenerator *dtpg,
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const UChar *pattern, int32_t length,
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UChar *baseSkeleton, int32_t capacity,
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UErrorCode *pErrorCode);
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/**
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* Adds a pattern to the generator. If the pattern has the same skeleton as
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* an existing pattern, and the override parameter is set, then the previous
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* value is overriden. Otherwise, the previous value is retained. In either
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* case, the conflicting status is set and previous vale is stored in
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* conflicting pattern.
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* <p>
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* Note that single-field patterns (like "MMM") are automatically added, and
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* don't need to be added explicitly!
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*
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* @param dtpg a pointer to UDateTimePatternGenerator.
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* @param pattern input pattern, such as "dd/MMM"
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* @param patternLength the length of pattern.
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* @param override When existing values are to be overridden use true,
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* otherwise use false.
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* @param conflictingPattern Previous pattern with the same skeleton.
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* @param capacity the capacity of conflictingPattern.
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* @param pLength a pointer to the length of conflictingPattern.
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* @param pErrorCode a pointer to the UErrorCode which must not indicate a
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* failure before the function call.
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* @return conflicting status. The value could be UDATPG_NO_CONFLICT,
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* UDATPG_BASE_CONFLICT or UDATPG_CONFLICT.
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* @stable ICU 3.8
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*/
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U_DRAFT UDateTimePatternConflict U_EXPORT2
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udatpg_addPattern(UDateTimePatternGenerator *dtpg,
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const UChar *pattern, int32_t patternLength,
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UBool override,
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UChar *conflictingPattern, int32_t capacity, int32_t *pLength,
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UErrorCode *pErrorCode);
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/**
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* An AppendItem format is a pattern used to append a field if there is no
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* good match. For example, suppose that the input skeleton is "GyyyyMMMd",
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* and there is no matching pattern internally, but there is a pattern
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* matching "yyyyMMMd", say "d-MM-yyyy". Then that pattern is used, plus the
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* G. The way these two are conjoined is by using the AppendItemFormat for G
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* (era). So if that value is, say "{0}, {1}" then the final resulting
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* pattern is "d-MM-yyyy, G".
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* <p>
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* There are actually three available variables: {0} is the pattern so far,
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* {1} is the element we are adding, and {2} is the name of the element.
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* <p>
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* This reflects the way that the CLDR data is organized.
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*
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* @param dtpg a pointer to UDateTimePatternGenerator.
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* @param field UDateTimePatternField, such as UDATPG_ERA_FIELD
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* @param value pattern, such as "{0}, {1}"
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* @param length the length of value.
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* @stable ICU 3.8
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*/
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U_DRAFT void U_EXPORT2
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udatpg_setAppendItemFormat(UDateTimePatternGenerator *dtpg,
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UDateTimePatternField field,
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const UChar *value, int32_t length);
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/**
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* Getter corresponding to setAppendItemFormat. Values below 0 or at or
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* above UDATPG_FIELD_COUNT are illegal arguments.
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*
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* @param dtpg A pointer to UDateTimePatternGenerator.
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* @param field UDateTimePatternField, such as UDATPG_ERA_FIELD
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* @param pLength A pointer that will receive the length of appendItemFormat.
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* @return appendItemFormat for field.
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* @stable ICU 3.8
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*/
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U_DRAFT const UChar * U_EXPORT2
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udatpg_getAppendItemFormat(const UDateTimePatternGenerator *dtpg,
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UDateTimePatternField field,
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int32_t *pLength);
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/**
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* Set the name of field, eg "era" in English for ERA. These are only
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* used if the corresponding AppendItemFormat is used, and if it contains a
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* {2} variable.
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* <p>
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* This reflects the way that the CLDR data is organized.
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*
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* @param dtpg a pointer to UDateTimePatternGenerator.
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* @param field UDateTimePatternField
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* @param value name for the field.
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* @param length the length of value.
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* @stable ICU 3.8
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*/
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U_DRAFT void U_EXPORT2
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udatpg_setAppendItemName(UDateTimePatternGenerator *dtpg,
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UDateTimePatternField field,
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const UChar *value, int32_t length);
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/**
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* Getter corresponding to setAppendItemNames. Values below 0 or at or above
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* UDATPG_FIELD_COUNT are illegal arguments.
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*
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* @param dtpg a pointer to UDateTimePatternGenerator.
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* @param field UDateTimePatternField, such as UDATPG_ERA_FIELD
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* @param pLength A pointer that will receive the length of the name for field.
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* @return name for field
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* @stable ICU 3.8
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*/
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U_DRAFT const UChar * U_EXPORT2
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udatpg_getAppendItemName(const UDateTimePatternGenerator *dtpg,
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UDateTimePatternField field,
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int32_t *pLength);
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/**
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* The date time format is a message format pattern used to compose date and
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* time patterns. The default value is "{0} {1}", where {0} will be replaced
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* by the date pattern and {1} will be replaced by the time pattern.
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* <p>
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* This is used when the input skeleton contains both date and time fields,
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* but there is not a close match among the added patterns. For example,
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* suppose that this object was created by adding "dd-MMM" and "hh:mm", and
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* its datetimeFormat is the default "{0} {1}". Then if the input skeleton
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* is "MMMdhmm", there is not an exact match, so the input skeleton is
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* broken up into two components "MMMd" and "hmm". There are close matches
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* for those two skeletons, so the result is put together with this pattern,
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* resulting in "d-MMM h:mm".
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*
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* @param dtpg a pointer to UDateTimePatternGenerator.
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|
* @param dtFormat
|
||
|
|
* message format pattern, here {0} will be replaced by the date
|
||
|
|
* pattern and {1} will be replaced by the time pattern.
|
||
|
|
* @param length the length of dtFormat.
|
||
|
|
* @stable ICU 3.8
|
||
|
|
*/
|
||
|
|
U_DRAFT void U_EXPORT2
|
||
|
|
udatpg_setDateTimeFormat(const UDateTimePatternGenerator *dtpg,
|
||
|
|
const UChar *dtFormat, int32_t length);
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Getter corresponding to setDateTimeFormat.
|
||
|
|
* @param dtpg a pointer to UDateTimePatternGenerator.
|
||
|
|
* @param pLength A pointer that will receive the length of the format
|
||
|
|
* @return dateTimeFormat.
|
||
|
|
* @stable ICU 3.8
|
||
|
|
*/
|
||
|
|
U_DRAFT const UChar * U_EXPORT2
|
||
|
|
udatpg_getDateTimeFormat(const UDateTimePatternGenerator *dtpg,
|
||
|
|
int32_t *pLength);
|
||
|
|
|
||
|
|
/**
|
||
|
|
* The decimal value is used in formatting fractions of seconds. If the
|
||
|
|
* skeleton contains fractional seconds, then this is used with the
|
||
|
|
* fractional seconds. For example, suppose that the input pattern is
|
||
|
|
* "hhmmssSSSS", and the best matching pattern internally is "H:mm:ss", and
|
||
|
|
* the decimal string is ",". Then the resulting pattern is modified to be
|
||
|
|
* "H:mm:ss,SSSS"
|
||
|
|
*
|
||
|
|
* @param dtpg a pointer to UDateTimePatternGenerator.
|
||
|
|
* @param decimal
|
||
|
|
* @param length the length of decimal.
|
||
|
|
* @stable ICU 3.8
|
||
|
|
*/
|
||
|
|
U_DRAFT void U_EXPORT2
|
||
|
|
udatpg_setDecimal(UDateTimePatternGenerator *dtpg,
|
||
|
|
const UChar *decimal, int32_t length);
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Getter corresponding to setDecimal.
|
||
|
|
*
|
||
|
|
* @param dtpg a pointer to UDateTimePatternGenerator.
|
||
|
|
* @param pLength A pointer that will receive the length of the decimal string.
|
||
|
|
* @return corresponding to the decimal point.
|
||
|
|
* @stable ICU 3.8
|
||
|
|
*/
|
||
|
|
U_DRAFT const UChar * U_EXPORT2
|
||
|
|
udatpg_getDecimal(const UDateTimePatternGenerator *dtpg,
|
||
|
|
int32_t *pLength);
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Adjusts the field types (width and subtype) of a pattern to match what is
|
||
|
|
* in a skeleton. That is, if you supply a pattern like "d-M H:m", and a
|
||
|
|
* skeleton of "MMMMddhhmm", then the input pattern is adjusted to be
|
||
|
|
* "dd-MMMM hh:mm". This is used internally to get the best match for the
|
||
|
|
* input skeleton, but can also be used externally.
|
||
|
|
*
|
||
|
|
* Note that this function uses a non-const UDateTimePatternGenerator:
|
||
|
|
* It uses a stateful pattern parser which is set up for each generator object,
|
||
|
|
* rather than creating one for each function call.
|
||
|
|
* Consecutive calls to this function do not affect each other,
|
||
|
|
* but this function cannot be used concurrently on a single generator object.
|
||
|
|
*
|
||
|
|
* @param dtpg a pointer to UDateTimePatternGenerator.
|
||
|
|
* @param pattern Input pattern
|
||
|
|
* @param patternLength the length of input pattern.
|
||
|
|
* @param skeleton
|
||
|
|
* @param skeletonLength the length of input skeleton.
|
||
|
|
* @param dest pattern adjusted to match the skeleton fields widths and subtypes.
|
||
|
|
* @param destCapacity the capacity of dest.
|
||
|
|
* @param pErrorCode a pointer to the UErrorCode which must not indicate a
|
||
|
|
* failure before the function call.
|
||
|
|
* @return the length of dest.
|
||
|
|
* @stable ICU 3.8
|
||
|
|
*/
|
||
|
|
U_DRAFT int32_t U_EXPORT2
|
||
|
|
udatpg_replaceFieldTypes(UDateTimePatternGenerator *dtpg,
|
||
|
|
const UChar *pattern, int32_t patternLength,
|
||
|
|
const UChar *skeleton, int32_t skeletonLength,
|
||
|
|
UChar *dest, int32_t destCapacity,
|
||
|
|
UErrorCode *pErrorCode);
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Return a UEnumeration list of all the skeletons in canonical form.
|
||
|
|
* Call udatpg_getPatternForSkeleton() to get the corresponding pattern.
|
||
|
|
*
|
||
|
|
* @param dtpg a pointer to UDateTimePatternGenerator.
|
||
|
|
* @param pErrorCode a pointer to the UErrorCode which must not indicate a
|
||
|
|
* failure before the function call
|
||
|
|
* @return a UEnumeration list of all the skeletons
|
||
|
|
* The caller must close the object.
|
||
|
|
* @stable ICU 3.8
|
||
|
|
*/
|
||
|
|
U_DRAFT UEnumeration * U_EXPORT2
|
||
|
|
udatpg_openSkeletons(const UDateTimePatternGenerator *dtpg, UErrorCode *pErrorCode);
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Return a UEnumeration list of all the base skeletons in canonical form.
|
||
|
|
*
|
||
|
|
* @param dtpg a pointer to UDateTimePatternGenerator.
|
||
|
|
* @param pErrorCode a pointer to the UErrorCode which must not indicate a
|
||
|
|
* failure before the function call.
|
||
|
|
* @return a UEnumeration list of all the base skeletons
|
||
|
|
* The caller must close the object.
|
||
|
|
* @stable ICU 3.8
|
||
|
|
*/
|
||
|
|
U_DRAFT UEnumeration * U_EXPORT2
|
||
|
|
udatpg_openBaseSkeletons(const UDateTimePatternGenerator *dtpg, UErrorCode *pErrorCode);
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Get the pattern corresponding to a given skeleton.
|
||
|
|
*
|
||
|
|
* @param dtpg a pointer to UDateTimePatternGenerator.
|
||
|
|
* @param skeleton
|
||
|
|
* @param skeletonLength pointer to the length of skeleton.
|
||
|
|
* @param pLength pointer to the length of return pattern.
|
||
|
|
* @return pattern corresponding to a given skeleton.
|
||
|
|
* @stable ICU 3.8
|
||
|
|
*/
|
||
|
|
U_DRAFT const UChar * U_EXPORT2
|
||
|
|
udatpg_getPatternForSkeleton(const UDateTimePatternGenerator *dtpg,
|
||
|
|
const UChar *skeleton, int32_t skeletonLength,
|
||
|
|
int32_t *pLength);
|
||
|
|
|
||
|
|
#endif
|