// © 2016 and later: Unicode, Inc. and others. // License & terms of use: http://www.unicode.org/copyright.html /* ******************************************************************************* * Copyright (C) 1996-2016, International Business Machines * Corporation and others. All Rights Reserved. ******************************************************************************* */ #ifndef UDAT_H #define UDAT_H #include "unicode/utypes.h" #if !UCONFIG_NO_FORMATTING #include "unicode/ucal.h" #include "unicode/unum.h" #include "unicode/udisplaycontext.h" #include "unicode/ufieldpositer.h" #if U_SHOW_CPLUSPLUS_API #include "unicode/localpointer.h" #endif // U_SHOW_CPLUSPLUS_API /** * \file * \brief C API: DateFormat * * <h2> Date Format C API</h2> * * Date Format C API consists of functions that convert dates and * times from their internal representations to textual form and back again in a * language-independent manner. Converting from the internal representation (milliseconds * since midnight, January 1, 1970) to text is known as "formatting," and converting * from text to millis is known as "parsing." We currently define only one concrete * structure UDateFormat, which can handle pretty much all normal * date formatting and parsing actions. * <P> * Date Format helps you to format and parse dates for any locale. Your code can * be completely independent of the locale conventions for months, days of the * week, or even the calendar format: lunar vs. solar. * <P> * To format a date for the current Locale with default time and date style, * use one of the static factory methods: * <pre> * \code * UErrorCode status = U_ZERO_ERROR; * UChar *myString; * int32_t myStrlen = 0; * UDateFormat* dfmt = udat_open(UDAT_DEFAULT, UDAT_DEFAULT, NULL, NULL, -1, NULL, -1, &status); * myStrlen = udat_format(dfmt, myDate, NULL, myStrlen, NULL, &status); * if (status==U_BUFFER_OVERFLOW_ERROR){ * status=U_ZERO_ERROR; * myString=(UChar*)malloc(sizeof(UChar) * (myStrlen+1) ); * udat_format(dfmt, myDate, myString, myStrlen+1, NULL, &status); * } * \endcode * </pre> * If you are formatting multiple numbers, it is more efficient to get the * format and use it multiple times so that the system doesn't have to fetch the * information about the local language and country conventions multiple times. * <pre> * \code * UErrorCode status = U_ZERO_ERROR; * int32_t i, myStrlen = 0; * UChar* myString; * char buffer[1024]; * UDate myDateArr[] = { 0.0, 100000000.0, 2000000000.0 }; // test values * UDateFormat* df = udat_open(UDAT_DEFAULT, UDAT_DEFAULT, NULL, NULL, -1, NULL, 0, &status); * for (i = 0; i < 3; i++) { * myStrlen = udat_format(df, myDateArr[i], NULL, myStrlen, NULL, &status); * if(status == U_BUFFER_OVERFLOW_ERROR){ * status = U_ZERO_ERROR; * myString = (UChar*)malloc(sizeof(UChar) * (myStrlen+1) ); * udat_format(df, myDateArr[i], myString, myStrlen+1, NULL, &status); * printf("%s\n", u_austrcpy(buffer, myString) ); * free(myString); * } * } * \endcode * </pre> * To get specific fields of a date, you can use UFieldPosition to * get specific fields. * <pre> * \code * UErrorCode status = U_ZERO_ERROR; * UFieldPosition pos; * UChar *myString; * int32_t myStrlen = 0; * char buffer[1024]; * * pos.field = 1; // Same as the DateFormat::EField enum * UDateFormat* dfmt = udat_open(UDAT_DEFAULT, UDAT_DEFAULT, NULL, -1, NULL, 0, &status); * myStrlen = udat_format(dfmt, myDate, NULL, myStrlen, &pos, &status); * if (status==U_BUFFER_OVERFLOW_ERROR){ * status=U_ZERO_ERROR; * myString=(UChar*)malloc(sizeof(UChar) * (myStrlen+1) ); * udat_format(dfmt, myDate, myString, myStrlen+1, &pos, &status); * } * printf("date format: %s\n", u_austrcpy(buffer, myString)); * buffer[pos.endIndex] = 0; // NULL terminate the string. * printf("UFieldPosition position equals %s\n", &buffer[pos.beginIndex]); * \endcode * </pre> * To format a date for a different Locale, specify it in the call to * udat_open() * <pre> * \code * UDateFormat* df = udat_open(UDAT_SHORT, UDAT_SHORT, "fr_FR", NULL, -1, NULL, 0, &status); * \endcode * </pre> * You can use a DateFormat API udat_parse() to parse. * <pre> * \code * UErrorCode status = U_ZERO_ERROR; * int32_t parsepos=0; * UDate myDate = udat_parse(df, myString, u_strlen(myString), &parsepos, &status); * \endcode * </pre> * You can pass in different options for the arguments for date and time style * to control the length of the result; from SHORT to MEDIUM to LONG to FULL. * The exact result depends on the locale, but generally: * see UDateFormatStyle for more details * <ul type=round> * <li> UDAT_SHORT is completely numeric, such as 12/13/52 or 3:30pm * <li> UDAT_MEDIUM is longer, such as Jan 12, 1952 * <li> UDAT_LONG is longer, such as January 12, 1952 or 3:30:32pm * <li> UDAT_FULL is pretty completely specified, such as * Tuesday, April 12, 1952 AD or 3:30:42pm PST. * </ul> * You can also set the time zone on the format if you wish. * <P> * You can also use forms of the parse and format methods with Parse Position and * UFieldPosition to allow you to * <ul type=round> * <li> Progressively parse through pieces of a string. * <li> Align any particular field, or find out where it is for selection * on the screen. * </ul> * <p><strong>Date and Time Patterns:</strong></p> * * <p>Date and time formats are specified by <em>date and time pattern</em> strings. * Within date and time pattern strings, all unquoted ASCII letters [A-Za-z] are reserved * as pattern letters representing calendar fields. <code>UDateFormat</code> supports * the date and time formatting algorithm and pattern letters defined by * <a href="http://www.unicode.org/reports/tr35/tr35-dates.html#Date_Field_Symbol_Table">UTS#35 * Unicode Locale Data Markup Language (LDML)</a> and further documented for ICU in the * <a href="https://unicode-org.github.io/icu/userguide/format_parse/datetime#date-field-symbol-table">ICU * User Guide</a>.</p> */ /** A date formatter. * For usage in C programs. * @stable ICU 2.6 */ UDateFormat; /** The possible date/time format styles * @stable ICU 2.6 */ UDateFormatStyle; /* Skeletons for dates. */ /** * Constant for date skeleton with year. * @stable ICU 4.0 */ #define UDAT_YEAR … /** * Constant for date skeleton with quarter. * @stable ICU 51 */ #define UDAT_QUARTER … /** * Constant for date skeleton with abbreviated quarter. * @stable ICU 51 */ #define UDAT_ABBR_QUARTER … /** * Constant for date skeleton with year and quarter. * @stable ICU 4.0 */ #define UDAT_YEAR_QUARTER … /** * Constant for date skeleton with year and abbreviated quarter. * @stable ICU 4.0 */ #define UDAT_YEAR_ABBR_QUARTER … /** * Constant for date skeleton with month. * @stable ICU 4.0 */ #define UDAT_MONTH … /** * Constant for date skeleton with abbreviated month. * @stable ICU 4.0 */ #define UDAT_ABBR_MONTH … /** * Constant for date skeleton with numeric month. * @stable ICU 4.0 */ #define UDAT_NUM_MONTH … /** * Constant for date skeleton with year and month. * @stable ICU 4.0 */ #define UDAT_YEAR_MONTH … /** * Constant for date skeleton with year and abbreviated month. * @stable ICU 4.0 */ #define UDAT_YEAR_ABBR_MONTH … /** * Constant for date skeleton with year and numeric month. * @stable ICU 4.0 */ #define UDAT_YEAR_NUM_MONTH … /** * Constant for date skeleton with day. * @stable ICU 4.0 */ #define UDAT_DAY … /** * Constant for date skeleton with year, month, and day. * Used in combinations date + time, date + time + zone, or time + zone. * @stable ICU 4.0 */ #define UDAT_YEAR_MONTH_DAY … /** * Constant for date skeleton with year, abbreviated month, and day. * Used in combinations date + time, date + time + zone, or time + zone. * @stable ICU 4.0 */ #define UDAT_YEAR_ABBR_MONTH_DAY … /** * Constant for date skeleton with year, numeric month, and day. * Used in combinations date + time, date + time + zone, or time + zone. * @stable ICU 4.0 */ #define UDAT_YEAR_NUM_MONTH_DAY … /** * Constant for date skeleton with weekday. * @stable ICU 51 */ #define UDAT_WEEKDAY … /** * Constant for date skeleton with abbreviated weekday. * @stable ICU 51 */ #define UDAT_ABBR_WEEKDAY … /** * Constant for date skeleton with year, month, weekday, and day. * Used in combinations date + time, date + time + zone, or time + zone. * @stable ICU 4.0 */ #define UDAT_YEAR_MONTH_WEEKDAY_DAY … /** * Constant for date skeleton with year, abbreviated month, weekday, and day. * Used in combinations date + time, date + time + zone, or time + zone. * @stable ICU 4.0 */ #define UDAT_YEAR_ABBR_MONTH_WEEKDAY_DAY … /** * Constant for date skeleton with year, numeric month, weekday, and day. * Used in combinations date + time, date + time + zone, or time + zone. * @stable ICU 4.0 */ #define UDAT_YEAR_NUM_MONTH_WEEKDAY_DAY … /** * Constant for date skeleton with long month and day. * Used in combinations date + time, date + time + zone, or time + zone. * @stable ICU 4.0 */ #define UDAT_MONTH_DAY … /** * Constant for date skeleton with abbreviated month and day. * Used in combinations date + time, date + time + zone, or time + zone. * @stable ICU 4.0 */ #define UDAT_ABBR_MONTH_DAY … /** * Constant for date skeleton with numeric month and day. * Used in combinations date + time, date + time + zone, or time + zone. * @stable ICU 4.0 */ #define UDAT_NUM_MONTH_DAY … /** * Constant for date skeleton with month, weekday, and day. * Used in combinations date + time, date + time + zone, or time + zone. * @stable ICU 4.0 */ #define UDAT_MONTH_WEEKDAY_DAY … /** * Constant for date skeleton with abbreviated month, weekday, and day. * Used in combinations date + time, date + time + zone, or time + zone. * @stable ICU 4.0 */ #define UDAT_ABBR_MONTH_WEEKDAY_DAY … /** * Constant for date skeleton with numeric month, weekday, and day. * Used in combinations date + time, date + time + zone, or time + zone. * @stable ICU 4.0 */ #define UDAT_NUM_MONTH_WEEKDAY_DAY … /* Skeletons for times. */ /** * Constant for date skeleton with hour, with the locale's preferred hour format (12 or 24). * @stable ICU 4.0 */ #define UDAT_HOUR … /** * Constant for date skeleton with hour in 24-hour presentation. * @stable ICU 51 */ #define UDAT_HOUR24 … /** * Constant for date skeleton with minute. * @stable ICU 51 */ #define UDAT_MINUTE … /** * Constant for date skeleton with hour and minute, with the locale's preferred hour format (12 or 24). * Used in combinations date + time, date + time + zone, or time + zone. * @stable ICU 4.0 */ #define UDAT_HOUR_MINUTE … /** * Constant for date skeleton with hour and minute in 24-hour presentation. * Used in combinations date + time, date + time + zone, or time + zone. * @stable ICU 4.0 */ #define UDAT_HOUR24_MINUTE … /** * Constant for date skeleton with second. * @stable ICU 51 */ #define UDAT_SECOND … /** * Constant for date skeleton with hour, minute, and second, * with the locale's preferred hour format (12 or 24). * Used in combinations date + time, date + time + zone, or time + zone. * @stable ICU 4.0 */ #define UDAT_HOUR_MINUTE_SECOND … /** * Constant for date skeleton with hour, minute, and second in * 24-hour presentation. * Used in combinations date + time, date + time + zone, or time + zone. * @stable ICU 4.0 */ #define UDAT_HOUR24_MINUTE_SECOND … /** * Constant for date skeleton with minute and second. * Used in combinations date + time, date + time + zone, or time + zone. * @stable ICU 4.0 */ #define UDAT_MINUTE_SECOND … /* Skeletons for time zones. */ /** * Constant for <i>generic location format</i>, such as Los Angeles Time; * used in combinations date + time + zone, or time + zone. * @see <a href="http://unicode.org/reports/tr35/#Date_Format_Patterns">LDML Date Format Patterns</a> * @see <a href="http://unicode.org/reports/tr35/#Time_Zone_Fallback">LDML Time Zone Fallback</a> * @stable ICU 51 */ #define UDAT_LOCATION_TZ … /** * Constant for <i>generic non-location format</i>, such as Pacific Time; * used in combinations date + time + zone, or time + zone. * @see <a href="http://unicode.org/reports/tr35/#Date_Format_Patterns">LDML Date Format Patterns</a> * @see <a href="http://unicode.org/reports/tr35/#Time_Zone_Fallback">LDML Time Zone Fallback</a> * @stable ICU 51 */ #define UDAT_GENERIC_TZ … /** * Constant for <i>generic non-location format</i>, abbreviated if possible, such as PT; * used in combinations date + time + zone, or time + zone. * @see <a href="http://unicode.org/reports/tr35/#Date_Format_Patterns">LDML Date Format Patterns</a> * @see <a href="http://unicode.org/reports/tr35/#Time_Zone_Fallback">LDML Time Zone Fallback</a> * @stable ICU 51 */ #define UDAT_ABBR_GENERIC_TZ … /** * Constant for <i>specific non-location format</i>, such as Pacific Daylight Time; * used in combinations date + time + zone, or time + zone. * @see <a href="http://unicode.org/reports/tr35/#Date_Format_Patterns">LDML Date Format Patterns</a> * @see <a href="http://unicode.org/reports/tr35/#Time_Zone_Fallback">LDML Time Zone Fallback</a> * @stable ICU 51 */ #define UDAT_SPECIFIC_TZ … /** * Constant for <i>specific non-location format</i>, abbreviated if possible, such as PDT; * used in combinations date + time + zone, or time + zone. * @see <a href="http://unicode.org/reports/tr35/#Date_Format_Patterns">LDML Date Format Patterns</a> * @see <a href="http://unicode.org/reports/tr35/#Time_Zone_Fallback">LDML Time Zone Fallback</a> * @stable ICU 51 */ #define UDAT_ABBR_SPECIFIC_TZ … /** * Constant for <i>localized GMT/UTC format</i>, such as GMT+8:00 or HPG-8:00; * used in combinations date + time + zone, or time + zone. * @see <a href="http://unicode.org/reports/tr35/#Date_Format_Patterns">LDML Date Format Patterns</a> * @see <a href="http://unicode.org/reports/tr35/#Time_Zone_Fallback">LDML Time Zone Fallback</a> * @stable ICU 51 */ #define UDAT_ABBR_UTC_TZ … /* deprecated skeleton constants */ #ifndef U_HIDE_DEPRECATED_API /** * Constant for date skeleton with standalone month. * @deprecated ICU 50 Use UDAT_MONTH instead. */ #define UDAT_STANDALONE_MONTH … /** * Constant for date skeleton with standalone abbreviated month. * @deprecated ICU 50 Use UDAT_ABBR_MONTH instead. */ #define UDAT_ABBR_STANDALONE_MONTH … /** * Constant for date skeleton with hour, minute, and generic timezone. * @deprecated ICU 50 Use instead UDAT_HOUR_MINUTE UDAT_ABBR_GENERIC_TZ or some other timezone presentation. */ #define UDAT_HOUR_MINUTE_GENERIC_TZ … /** * Constant for date skeleton with hour, minute, and timezone. * @deprecated ICU 50 Use instead UDAT_HOUR_MINUTE UDAT_ABBR_SPECIFIC_TZ or some other timezone presentation. */ #define UDAT_HOUR_MINUTE_TZ … /** * Constant for date skeleton with hour and generic timezone. * @deprecated ICU 50 Use instead UDAT_HOUR UDAT_ABBR_GENERIC_TZ or some other timezone presentation. */ #define UDAT_HOUR_GENERIC_TZ … /** * Constant for date skeleton with hour and timezone. * @deprecated ICU 50 Use instead UDAT_HOUR UDAT_ABBR_SPECIFIC_TZ or some other timezone presentation. */ #define UDAT_HOUR_TZ … #endif /* U_HIDE_DEPRECATED_API */ #ifndef U_HIDE_INTERNAL_API /** * Constant for Unicode string name of new (in 2019) Japanese calendar era, * root/English abbreviated version (ASCII-range characters). * @internal */ #define JP_ERA_2019_ROOT … /** * Constant for Unicode string name of new (in 2019) Japanese calendar era, * Japanese abbreviated version (Han, or fullwidth Latin for testing). * @internal */ #define JP_ERA_2019_JA … /** * Constant for Unicode string name of new (in 2019) Japanese calendar era, * root and Japanese narrow version (ASCII-range characters). * @internal */ #define JP_ERA_2019_NARROW … #endif // U_HIDE_INTERNAL_API /** * FieldPosition and UFieldPosition selectors for format fields * defined by DateFormat and UDateFormat. * @stable ICU 3.0 */ UDateFormatField; #ifndef U_HIDE_INTERNAL_API /** * Is a pattern character defined for UDAT_TIME_SEPARATOR_FIELD? * In ICU 55 it was COLON, but that was withdrawn in ICU 56. * @internal ICU 56 */ #define UDAT_HAS_PATTERN_CHAR_FOR_TIME_SEPARATOR … #endif /* U_HIDE_INTERNAL_API */ /** * Maps from a UDateFormatField to the corresponding UCalendarDateFields. * * Note 1: Since the mapping is many-to-one, there is no inverse mapping. * * Note 2: There is no UErrorCode parameter, so in case of error (UDateFormatField is * unknown or has no corresponding UCalendarDateFields value), the function returns the * current value of UCAL_FIELD_COUNT. However, that value may change from release to * release and is consequently deprecated. For a future-proof runtime way of checking * for errors: * a) First save the value returned by the function when it is passed an invalid value * such as "(UDateFormatField)-1". * b) Then, to test for errors when passing some other UDateFormatField value, check * whether the function returns that saved value. * * @param field the UDateFormatField. * @return the UCalendarDateField. In case of error (UDateFormatField is unknown or has * no corresponding UCalendarDateFields value) this will be the current value of * UCAL_FIELD_COUNT, but that value may change from release to release. * See Note 2 above. * @stable ICU 4.4 */ U_CAPI UCalendarDateFields U_EXPORT2 udat_toCalendarDateField(UDateFormatField field); /** * Open a new UDateFormat for formatting and parsing dates and times. * A UDateFormat may be used to format dates in calls to {@link #udat_format }, * and to parse dates in calls to {@link #udat_parse }. * @param timeStyle The style used to format times; one of UDAT_FULL, UDAT_LONG, * UDAT_MEDIUM, UDAT_SHORT, UDAT_DEFAULT, or UDAT_NONE (relative time styles * are not currently supported). * When the pattern parameter is used, pass in UDAT_PATTERN for both timeStyle and dateStyle. * @param dateStyle The style used to format dates; one of UDAT_FULL, UDAT_LONG, * UDAT_MEDIUM, UDAT_SHORT, UDAT_DEFAULT, UDAT_FULL_RELATIVE, UDAT_LONG_RELATIVE, * UDAT_MEDIUM_RELATIVE, UDAT_SHORT_RELATIVE, or UDAT_NONE. * When the pattern parameter is used, pass in UDAT_PATTERN for both timeStyle and dateStyle. * As currently implemented, * relative date formatting only affects a limited range of calendar days before or * after the current date, based on the CLDR <field type="day">/<relative> data: For * example, in English, "Yesterday", "Today", and "Tomorrow". Outside of this range, * dates are formatted using the corresponding non-relative style. * @param locale The locale specifying the formatting conventions * @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. * @param pattern A pattern specifying the format to use. * @param patternLength The number of characters in the pattern, or -1 if null-terminated. * @param status A pointer to an UErrorCode to receive any errors * @return A pointer to a UDateFormat to use for formatting dates and times, or 0 if * an error occurred. * @stable ICU 2.0 */ U_CAPI UDateFormat* U_EXPORT2 udat_open(UDateFormatStyle timeStyle, UDateFormatStyle dateStyle, const char *locale, const UChar *tzID, int32_t tzIDLength, const UChar *pattern, int32_t patternLength, UErrorCode *status); /** * Close a UDateFormat. * Once closed, a UDateFormat may no longer be used. * @param format The formatter to close. * @stable ICU 2.0 */ U_CAPI void U_EXPORT2 udat_close(UDateFormat* format); /** * DateFormat boolean attributes * * @stable ICU 53 */ UDateFormatBooleanAttribute; /** * Get a boolean attribute associated with a UDateFormat. * An example would be a true value for a key of UDAT_PARSE_ALLOW_WHITESPACE indicating allowing whitespace leniency. * If the formatter does not understand the attribute, -1 is returned. * @param fmt The formatter to query. * @param attr The attribute to query; e.g. UDAT_PARSE_ALLOW_WHITESPACE. * @param status A pointer to an UErrorCode to receive any errors * @return The value of attr. * @stable ICU 53 */ U_CAPI UBool U_EXPORT2 udat_getBooleanAttribute(const UDateFormat* fmt, UDateFormatBooleanAttribute attr, UErrorCode* status); /** * Set a boolean attribute associated with a UDateFormat. * An example of a boolean attribute is parse leniency control. If the formatter does not understand * the attribute, the call is ignored. * @param fmt The formatter to set. * @param attr The attribute to set; one of UDAT_PARSE_ALLOW_WHITESPACE or UDAT_PARSE_ALLOW_NUMERIC * @param newValue The new value of attr. * @param status A pointer to an UErrorCode to receive any errors * @stable ICU 53 */ U_CAPI void U_EXPORT2 udat_setBooleanAttribute(UDateFormat *fmt, UDateFormatBooleanAttribute attr, UBool newValue, UErrorCode* status); /** * Hour Cycle. * @stable ICU 67 */ UDateFormatHourCycle; #if U_SHOW_CPLUSPLUS_API U_NAMESPACE_BEGIN /** * \class LocalUDateFormatPointer * "Smart pointer" class, closes a UDateFormat via udat_close(). * For most methods see the LocalPointerBase base class. * * @see LocalPointerBase * @see LocalPointer * @stable ICU 4.4 */ U_DEFINE_LOCAL_OPEN_POINTER(…); U_NAMESPACE_END #endif /** * Open a copy of a UDateFormat. * This function performs a deep copy. * @param fmt The format to copy * @param status A pointer to an UErrorCode to receive any errors. * @return A pointer to a UDateFormat identical to fmt. * @stable ICU 2.0 */ U_CAPI UDateFormat* U_EXPORT2 udat_clone(const UDateFormat *fmt, UErrorCode *status); /** * Format a date using a UDateFormat. * The date will be formatted using the conventions specified in {@link #udat_open } * @param format The formatter to use * @param dateToFormat The date to format * @param result A pointer to a buffer to receive the formatted number. * @param resultLength 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. * @param status A pointer to an UErrorCode to receive any errors * @return The total buffer size needed; if greater than resultLength, the output was truncated. * @see udat_parse * @see UFieldPosition * @stable ICU 2.0 */ U_CAPI int32_t U_EXPORT2 udat_format( const UDateFormat* format, UDate dateToFormat, UChar* result, int32_t resultLength, UFieldPosition* position, UErrorCode* status); /** * Format a date using an UDateFormat. * The date will be formatted using the conventions specified in {@link #udat_open } * @param format The formatter to use * @param calendar The calendar to format. The calendar instance might be * mutated if fields are not yet fully calculated, though * the function won't change the logical date and time held * by the instance. * @param result A pointer to a buffer to receive the formatted number. * @param capacity 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. * @param status A pointer to an UErrorCode to receive any errors * @return The total buffer size needed; if greater than resultLength, the output was truncated. * @see udat_format * @see udat_parseCalendar * @see UFieldPosition * @stable ICU 55 */ U_CAPI int32_t U_EXPORT2 udat_formatCalendar( const UDateFormat* format, UCalendar* calendar, UChar* result, int32_t capacity, UFieldPosition* position, UErrorCode* status); /** * Format a date using a UDateFormat. * The date will be formatted using the conventions specified in {@link #udat_open} * @param format * The formatter to use * @param dateToFormat * The date to format * @param result * A pointer to a buffer to receive the formatted number. * @param resultLength * The maximum size of result. * @param fpositer * A pointer to a UFieldPositionIterator created by {@link #ufieldpositer_open} * (may be NULL if field position information is not needed). Any * iteration information already present in the UFieldPositionIterator * will be deleted, and the iterator will be reset to apply to the * fields in the formatted string created by this function call; the * field values provided by {@link #ufieldpositer_next} will be from the * UDateFormatField enum. * @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. * @see udat_parse * @see UFieldPositionIterator * @stable ICU 55 */ U_CAPI int32_t U_EXPORT2 udat_formatForFields( const UDateFormat* format, UDate dateToFormat, UChar* result, int32_t resultLength, UFieldPositionIterator* fpositer, UErrorCode* status); /** * Format a date using a UDateFormat. * The date will be formatted using the conventions specified in {@link #udat_open } * @param format * The formatter to use * @param calendar * The calendar to format. The calendar instance might be mutated if fields * are not yet fully calculated, though the function won't change the logical * date and time held by the instance. * @param result * A pointer to a buffer to receive the formatted number. * @param capacity * The maximum size of result. * @param fpositer * A pointer to a UFieldPositionIterator created by {@link #ufieldpositer_open} * (may be NULL if field position information is not needed). Any * iteration information already present in the UFieldPositionIterator * will be deleted, and the iterator will be reset to apply to the * fields in the formatted string created by this function call; the * field values provided by {@link #ufieldpositer_next} will be from the * UDateFormatField enum. * @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. * @see udat_format * @see udat_parseCalendar * @see UFieldPositionIterator * @stable ICU 55 */ U_CAPI int32_t U_EXPORT2 udat_formatCalendarForFields( const UDateFormat* format, UCalendar* calendar, UChar* result, int32_t capacity, UFieldPositionIterator* fpositer, UErrorCode* status); /** * Parse a string into an date/time using a UDateFormat. * The date will be parsed using the conventions specified in {@link #udat_open }. * <P> * Note that the normal date formats associated with some calendars - such * as the Chinese lunar calendar - do not specify enough fields to enable * dates to be parsed unambiguously. In the case of the Chinese lunar * calendar, while the year within the current 60-year cycle is specified, * the number of such cycles since the start date of the calendar (in the * UCAL_ERA field of the UCalendar object) is not normally part of the format, * and parsing may assume the wrong era. For cases such as this it is * recommended that clients parse using udat_parseCalendar with the UCalendar * passed in set to the current date, or to a date within the era/cycle that * should be assumed if absent in the format. * * @param format The formatter to use. * @param text The text to parse. * @param textLength The length of text, or -1 if null-terminated. * @param parsePos If not 0, on input a pointer to an integer specifying the offset at which * to begin parsing. If not 0, on output the offset at which parsing ended. * @param status A pointer to an UErrorCode to receive any errors * @return The value of the parsed date/time * @see udat_format * @stable ICU 2.0 */ U_CAPI UDate U_EXPORT2 udat_parse(const UDateFormat* format, const UChar* text, int32_t textLength, int32_t *parsePos, UErrorCode *status); /** * Parse a string into an date/time using a UDateFormat. * The date will be parsed using the conventions specified in {@link #udat_open }. * @param format The formatter to use. * @param calendar A calendar set on input to the date and time to be used for * missing values in the date/time string being parsed, and set * on output to the parsed date/time. When the calendar type is * different from the internal calendar held by the UDateFormat * instance, the internal calendar will be cloned to a work * calendar set to the same milliseconds and time zone as this * calendar parameter, field values will be parsed based on the * work calendar, then the result (milliseconds and time zone) * will be set in this calendar. * @param text The text to parse. * @param textLength The length of text, or -1 if null-terminated. * @param parsePos If not 0, on input a pointer to an integer specifying the offset at which * to begin parsing. If not 0, on output the offset at which parsing ended. * @param status A pointer to an UErrorCode to receive any errors * @see udat_format * @stable ICU 2.0 */ U_CAPI void U_EXPORT2 udat_parseCalendar(const UDateFormat* format, UCalendar* calendar, const UChar* text, int32_t textLength, int32_t *parsePos, UErrorCode *status); /** * Determine if an UDateFormat will perform lenient parsing. * With lenient parsing, the parser may use heuristics to interpret inputs that do not * precisely match the pattern. With strict parsing, inputs must match the pattern. * @param fmt The formatter to query * @return true if fmt is set to perform lenient parsing, false otherwise. * @see udat_setLenient * @stable ICU 2.0 */ U_CAPI UBool U_EXPORT2 udat_isLenient(const UDateFormat* fmt); /** * Specify whether an UDateFormat will perform lenient parsing. * With lenient parsing, the parser may use heuristics to interpret inputs that do not * precisely match the pattern. With strict parsing, inputs must match the pattern. * @param fmt The formatter to set * @param isLenient true if fmt should perform lenient parsing, false otherwise. * @see dat_isLenient * @stable ICU 2.0 */ U_CAPI void U_EXPORT2 udat_setLenient( UDateFormat* fmt, UBool isLenient); /** * Get the UCalendar associated with an UDateFormat. * A UDateFormat uses a UCalendar to convert a raw value to, for example, * the day of the week. * @param fmt The formatter to query. * @return A pointer to the UCalendar used by fmt. * @see udat_setCalendar * @stable ICU 2.0 */ U_CAPI const UCalendar* U_EXPORT2 udat_getCalendar(const UDateFormat* fmt); /** * Set the UCalendar associated with an UDateFormat. * A UDateFormat uses a UCalendar to convert a raw value to, for example, * the day of the week. * @param fmt The formatter to set. * @param calendarToSet A pointer to an UCalendar to be used by fmt. * @see udat_setCalendar * @stable ICU 2.0 */ U_CAPI void U_EXPORT2 udat_setCalendar( UDateFormat* fmt, const UCalendar* calendarToSet); /** * Get the UNumberFormat associated with an UDateFormat. * A UDateFormat uses a UNumberFormat to format numbers within a date, * for example the day number. * @param fmt The formatter to query. * @return A pointer to the UNumberFormat used by fmt to format numbers. * @see udat_setNumberFormat * @stable ICU 2.0 */ U_CAPI const UNumberFormat* U_EXPORT2 udat_getNumberFormat(const UDateFormat* fmt); /** * Get the UNumberFormat for specific field associated with an UDateFormat. * For example: 'y' for year and 'M' for month * @param fmt The formatter to query. * @param field the field to query * @return A pointer to the UNumberFormat used by fmt to format field numbers. * @see udat_setNumberFormatForField * @stable ICU 54 */ U_CAPI const UNumberFormat* U_EXPORT2 udat_getNumberFormatForField(const UDateFormat* fmt, UChar field); /** * Set the UNumberFormat for specific field associated with an UDateFormat. * It can be a single field like: "y"(year) or "M"(month) * It can be several field combined together: "yM"(year and month) * Note: * 1 symbol field is enough for multiple symbol field (so "y" will override "yy", "yyy") * If the field is not numeric, then override has no effect (like "MMM" will use abbreviation, not numerical field) * * @param fields the fields to set * @param fmt The formatter to set. * @param numberFormatToSet A pointer to the UNumberFormat to be used by fmt to format numbers. * @param status error code passed around (memory allocation or invalid fields) * @see udat_getNumberFormatForField * @stable ICU 54 */ U_CAPI void U_EXPORT2 udat_adoptNumberFormatForFields( UDateFormat* fmt, const UChar* fields, UNumberFormat* numberFormatToSet, UErrorCode* status); /** * Set the UNumberFormat associated with an UDateFormat. * A UDateFormat uses a UNumberFormat to format numbers within a date, * for example the day number. * This method also clears per field NumberFormat instances previously * set by {@see udat_setNumberFormatForField} * @param fmt The formatter to set. * @param numberFormatToSet A pointer to the UNumberFormat to be used by fmt to format numbers. * @see udat_getNumberFormat * @see udat_setNumberFormatForField * @stable ICU 2.0 */ U_CAPI void U_EXPORT2 udat_setNumberFormat( UDateFormat* fmt, const UNumberFormat* numberFormatToSet); /** * Adopt the UNumberFormat associated with an UDateFormat. * A UDateFormat uses a UNumberFormat to format numbers within a date, * for example the day number. * @param fmt The formatter to set. * @param numberFormatToAdopt A pointer to the UNumberFormat to be used by fmt to format numbers. * @see udat_getNumberFormat * @stable ICU 54 */ U_CAPI void U_EXPORT2 udat_adoptNumberFormat( UDateFormat* fmt, UNumberFormat* numberFormatToAdopt); /** * Get a locale for which date/time formatting patterns are available. * A UDateFormat in a locale returned by this function will perform the correct * formatting and parsing for the locale. * @param localeIndex The index of the desired locale. * @return A locale for which date/time formatting patterns are available, or 0 if none. * @see udat_countAvailable * @stable ICU 2.0 */ U_CAPI const char* U_EXPORT2 udat_getAvailable(int32_t localeIndex); /** * Determine how many locales have date/time formatting patterns available. * This function is most useful as determining the loop ending condition for * calls to {@link #udat_getAvailable }. * @return The number of locales for which date/time formatting patterns are available. * @see udat_getAvailable * @stable ICU 2.0 */ U_CAPI int32_t U_EXPORT2 udat_countAvailable(void); /** * Get the year relative to which all 2-digit years are interpreted. * For example, if the 2-digit start year is 2100, the year 99 will be * interpreted as 2199. * @param fmt The formatter to query. * @param status A pointer to an UErrorCode to receive any errors * @return The year relative to which all 2-digit years are interpreted. * @see udat_Set2DigitYearStart * @stable ICU 2.0 */ U_CAPI UDate U_EXPORT2 udat_get2DigitYearStart( const UDateFormat *fmt, UErrorCode *status); /** * Set the year relative to which all 2-digit years will be interpreted. * For example, if the 2-digit start year is 2100, the year 99 will be * interpreted as 2199. * @param fmt The formatter to set. * @param d The year relative to which all 2-digit years will be interpreted. * @param status A pointer to an UErrorCode to receive any errors * @see udat_Set2DigitYearStart * @stable ICU 2.0 */ U_CAPI void U_EXPORT2 udat_set2DigitYearStart( UDateFormat *fmt, UDate d, UErrorCode *status); /** * Extract the pattern from a UDateFormat. * The pattern will follow the pattern syntax rules. * @param fmt The formatter to query. * @param localized true if the pattern should be localized, false otherwise. * @param result A pointer to a buffer to receive the pattern. * @param resultLength The maximum size of result. * @param status A pointer to an UErrorCode to receive any errors * @return The total buffer size needed; if greater than resultLength, the output was truncated. * @see udat_applyPattern * @stable ICU 2.0 */ U_CAPI int32_t U_EXPORT2 udat_toPattern( const UDateFormat *fmt, UBool localized, UChar *result, int32_t resultLength, UErrorCode *status); /** * Set the pattern used by an UDateFormat. * The pattern should follow the pattern syntax rules. * @param format The formatter to set. * @param localized true if the pattern is localized, false otherwise. * @param pattern The new pattern * @param patternLength The length of pattern, or -1 if null-terminated. * @see udat_toPattern * @stable ICU 2.0 */ U_CAPI void U_EXPORT2 udat_applyPattern( UDateFormat *format, UBool localized, const UChar *pattern, int32_t patternLength); /** * The possible types of date format symbols * @stable ICU 2.6 */ UDateFormatSymbolType; struct UDateFormatSymbols; /** Date format symbols. * For usage in C programs. * @stable ICU 2.6 */ UDateFormatSymbols; /** * Get the symbols associated with an UDateFormat. * The symbols are what a UDateFormat uses to represent locale-specific data, * for example month or day names. * @param fmt The formatter to query. * @param type The type of symbols to get. One of UDAT_ERAS, UDAT_MONTHS, UDAT_SHORT_MONTHS, * UDAT_WEEKDAYS, UDAT_SHORT_WEEKDAYS, UDAT_AM_PMS, or UDAT_LOCALIZED_CHARS * @param symbolIndex The desired symbol of type type. * @param result A pointer to a buffer to receive the pattern. * @param resultLength The maximum size of result. * @param status A pointer to an UErrorCode to receive any errors * @return The total buffer size needed; if greater than resultLength, the output was truncated. * @see udat_countSymbols * @see udat_setSymbols * @stable ICU 2.0 */ U_CAPI int32_t U_EXPORT2 udat_getSymbols(const UDateFormat *fmt, UDateFormatSymbolType type, int32_t symbolIndex, UChar *result, int32_t resultLength, UErrorCode *status); /** * Count the number of particular symbols for an UDateFormat. * This function is most useful as for determining the loop termination condition * for calls to {@link #udat_getSymbols }. * @param fmt The formatter to query. * @param type The type of symbols to count. One of UDAT_ERAS, UDAT_MONTHS, UDAT_SHORT_MONTHS, * UDAT_WEEKDAYS, UDAT_SHORT_WEEKDAYS, UDAT_AM_PMS, or UDAT_LOCALIZED_CHARS * @return The number of symbols of type type. * @see udat_getSymbols * @see udat_setSymbols * @stable ICU 2.0 */ U_CAPI int32_t U_EXPORT2 udat_countSymbols( const UDateFormat *fmt, UDateFormatSymbolType type); /** * Set the symbols associated with an UDateFormat. * The symbols are what a UDateFormat uses to represent locale-specific data, * for example month or day names. * @param format The formatter to set * @param type The type of symbols to set. One of UDAT_ERAS, UDAT_MONTHS, UDAT_SHORT_MONTHS, * UDAT_WEEKDAYS, UDAT_SHORT_WEEKDAYS, UDAT_AM_PMS, or UDAT_LOCALIZED_CHARS * @param symbolIndex The index of the symbol to set of type type. * @param value The new value * @param valueLength The length of value, or -1 if null-terminated * @param status A pointer to an UErrorCode to receive any errors * @see udat_getSymbols * @see udat_countSymbols * @stable ICU 2.0 */ U_CAPI void U_EXPORT2 udat_setSymbols( UDateFormat *format, UDateFormatSymbolType type, int32_t symbolIndex, UChar *value, int32_t valueLength, UErrorCode *status); /** * Get the locale for this date format object. * You can choose between valid and actual locale. * @param fmt The formatter to get the locale from * @param type type of the locale we're looking for (valid or actual) * @param status error code for the operation * @return the locale name * @stable ICU 2.8 */ U_CAPI const char* U_EXPORT2 udat_getLocaleByType(const UDateFormat *fmt, ULocDataLocaleType type, UErrorCode* status); /** * Set a particular UDisplayContext value in the formatter, such as * UDISPCTX_CAPITALIZATION_FOR_STANDALONE. * @param fmt The formatter for which to set a UDisplayContext value. * @param value The UDisplayContext value to set. * @param status A pointer to an UErrorCode to receive any errors * @stable ICU 51 */ U_CAPI void U_EXPORT2 udat_setContext(UDateFormat* fmt, UDisplayContext value, UErrorCode* status); /** * Get the formatter's UDisplayContext value for the specified UDisplayContextType, * such as UDISPCTX_TYPE_CAPITALIZATION. * @param fmt The formatter to query. * @param type The UDisplayContextType whose value to return * @param status A pointer to an UErrorCode to receive any errors * @return The UDisplayContextValue for the specified type. * @stable ICU 53 */ U_CAPI UDisplayContext U_EXPORT2 udat_getContext(const UDateFormat* fmt, UDisplayContextType type, UErrorCode* status); #ifndef U_HIDE_INTERNAL_API /** * Extract the date pattern from a UDateFormat set for relative date formatting. * The pattern will follow the pattern syntax rules. * @param fmt The formatter to query. * @param result A pointer to a buffer to receive the pattern. * @param resultLength The maximum size of result. * @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. * @see udat_applyPatternRelative * @internal ICU 4.2 technology preview */ U_CAPI int32_t U_EXPORT2 udat_toPatternRelativeDate(const UDateFormat *fmt, UChar *result, int32_t resultLength, UErrorCode *status); /** * Extract the time pattern from a UDateFormat set for relative date formatting. * The pattern will follow the pattern syntax rules. * @param fmt The formatter to query. * @param result A pointer to a buffer to receive the pattern. * @param resultLength The maximum size of result. * @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. * @see udat_applyPatternRelative * @internal ICU 4.2 technology preview */ U_CAPI int32_t U_EXPORT2 udat_toPatternRelativeTime(const UDateFormat *fmt, UChar *result, int32_t resultLength, UErrorCode *status); /** * Set the date & time patterns used by a UDateFormat set for relative date formatting. * The patterns should follow the pattern syntax rules. * @param format The formatter to set. * @param datePattern The new date pattern * @param datePatternLength The length of datePattern, or -1 if null-terminated. * @param timePattern The new time pattern * @param timePatternLength The length of timePattern, or -1 if null-terminated. * @param status A pointer to a UErrorCode to receive any errors * @see udat_toPatternRelativeDate, udat_toPatternRelativeTime * @internal ICU 4.2 technology preview */ U_CAPI void U_EXPORT2 udat_applyPatternRelative(UDateFormat *format, const UChar *datePattern, int32_t datePatternLength, const UChar *timePattern, int32_t timePatternLength, UErrorCode *status); /** * @internal * @see udat_open */ UDateFormatOpener; /** * Register a provider factory * @internal ICU 49 */ U_CAPI void U_EXPORT2 udat_registerOpener(UDateFormatOpener opener, UErrorCode *status); /** * Un-Register a provider factory * @internal ICU 49 */ U_CAPI UDateFormatOpener U_EXPORT2 udat_unregisterOpener(UDateFormatOpener opener, UErrorCode *status); #endif /* U_HIDE_INTERNAL_API */ #endif /* #if !UCONFIG_NO_FORMATTING */ #endif
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