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haiku/headers/libs/icu/unicode/udat.h
Oliver Tappe 75f1522155 * reintegrated gsoc-locale-kit branch into trunk - there's more 
work to do, but it's about time to give this code more exposure.



git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@33176 a95241bf-73f2-0310-859d-f6bbb57e9c96
2009-09-18 22:23:34 +00:00

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/*
*******************************************************************************
* Copyright (C) 1996-2009, 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"
/**
* \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>
*/
/** A date formatter.
* For usage in C programs.
* @stable ICU 2.6
*/
typedef void* UDateFormat;
/** The possible date/time format styles
* @stable ICU 2.6
*/
typedef enum UDateFormatStyle {
/** Full style */
UDAT_FULL,
/** Long style */
UDAT_LONG,
/** Medium style */
UDAT_MEDIUM,
/** Short style */
UDAT_SHORT,
/** Default style */
UDAT_DEFAULT = UDAT_MEDIUM,
/** Bitfield for relative date */
UDAT_RELATIVE = (1 << 7),
UDAT_FULL_RELATIVE = UDAT_FULL | UDAT_RELATIVE,
UDAT_LONG_RELATIVE = UDAT_LONG | UDAT_RELATIVE,
UDAT_MEDIUM_RELATIVE = UDAT_MEDIUM | UDAT_RELATIVE,
UDAT_SHORT_RELATIVE = UDAT_SHORT | UDAT_RELATIVE,
/** No style */
UDAT_NONE = -1,
/** for internal API use only */
UDAT_IGNORE = -2
} UDateFormatStyle;
/**
* @{
* Below are a set of pre-defined skeletons.
*
* <P>
* A skeleton
* <ol>
* <li>
* only keeps the field pattern letter and ignores all other parts
* in a pattern, such as space, punctuations, and string literals.
* </li>
* <li>
* hides the order of fields.
* </li>
* <li>
* might hide a field's pattern letter length.
*
* For those non-digit calendar fields, the pattern letter length is
* important, such as MMM, MMMM, and MMMMM; EEE and EEEE,
* and the field's pattern letter length is honored.
*
* For the digit calendar fields, such as M or MM, d or dd, yy or yyyy,
* the field pattern length is ignored and the best match, which is defined
* in date time patterns, will be returned without honor the field pattern
* letter length in skeleton.
* </li>
* </ol>
*
* @stable ICU 4.0
*/
#define UDAT_MINUTE_SECOND "ms"
#define UDAT_HOUR24_MINUTE "Hm"
#define UDAT_HOUR24_MINUTE_SECOND "Hms"
#define UDAT_HOUR_MINUTE_SECOND "hms"
#define UDAT_STANDALONE_MONTH "LLLL"
#define UDAT_ABBR_STANDALONE_MONTH "LLL"
#define UDAT_YEAR_QUARTER "yQQQ"
#define UDAT_YEAR_ABBR_QUARTER "yQ"
/** @} */
/**
* @{
* Below are a set of pre-defined skeletons that
* have pre-defined interval patterns in resource files.
* Users are encouraged to use them in date interval format factory methods.
*
*/
#define UDAT_HOUR_MINUTE "hm"
#define UDAT_YEAR "y"
#define UDAT_DAY "d"
#define UDAT_NUM_MONTH_WEEKDAY_DAY "MEd"
#define UDAT_YEAR_NUM_MONTH "yM"
#define UDAT_NUM_MONTH_DAY "Md"
#define UDAT_YEAR_NUM_MONTH_WEEKDAY_DAY "yMEd"
#define UDAT_ABBR_MONTH_WEEKDAY_DAY "MMMEd"
#define UDAT_YEAR_MONTH "yMMMM"
#define UDAT_YEAR_ABBR_MONTH "yMMM"
#define UDAT_MONTH_DAY "MMMMd"
#define UDAT_ABBR_MONTH_DAY "MMMd"
#define UDAT_MONTH_WEEKDAY_DAY "MMMMEEEEd"
#define UDAT_YEAR_ABBR_MONTH_WEEKDAY_DAY "yMMMEd"
#define UDAT_YEAR_MONTH_WEEKDAY_DAY "yMMMMEEEEd"
#define UDAT_YEAR_MONTH_DAY "yMMMMd"
#define UDAT_YEAR_ABBR_MONTH_DAY "yMMMd"
#define UDAT_YEAR_NUM_MONTH_DAY "yMd"
#define UDAT_NUM_MONTH "M"
#define UDAT_ABBR_MONTH "MMM"
#define UDAT_MONTH "MMMM"
#define UDAT_HOUR_MINUTE_GENERIC_TZ "hmv"
#define UDAT_HOUR_MINUTE_TZ "hmz"
#define UDAT_HOUR "h"
#define UDAT_HOUR_GENERIC_TZ "hv"
#define UDAT_HOUR_TZ "hz"
/** @} */
/**
* FieldPosition and UFieldPosition selectors for format fields
* defined by DateFormat and UDateFormat.
* @stable ICU 3.0
*/
typedef enum UDateFormatField {
/**
* FieldPosition and UFieldPosition selector for 'G' field alignment,
* corresponding to the UCAL_ERA field.
* @stable ICU 3.0
*/
UDAT_ERA_FIELD = 0,
/**
* FieldPosition and UFieldPosition selector for 'y' field alignment,
* corresponding to the UCAL_YEAR field.
* @stable ICU 3.0
*/
UDAT_YEAR_FIELD = 1,
/**
* FieldPosition and UFieldPosition selector for 'M' field alignment,
* corresponding to the UCAL_MONTH field.
* @stable ICU 3.0
*/
UDAT_MONTH_FIELD = 2,
/**
* FieldPosition and UFieldPosition selector for 'd' field alignment,
* corresponding to the UCAL_DATE field.
* @stable ICU 3.0
*/
UDAT_DATE_FIELD = 3,
/**
* FieldPosition and UFieldPosition selector for 'k' field alignment,
* corresponding to the UCAL_HOUR_OF_DAY field.
* UDAT_HOUR_OF_DAY1_FIELD is used for the one-based 24-hour clock.
* For example, 23:59 + 01:00 results in 24:59.
* @stable ICU 3.0
*/
UDAT_HOUR_OF_DAY1_FIELD = 4,
/**
* FieldPosition and UFieldPosition selector for 'H' field alignment,
* corresponding to the UCAL_HOUR_OF_DAY field.
* UDAT_HOUR_OF_DAY0_FIELD is used for the zero-based 24-hour clock.
* For example, 23:59 + 01:00 results in 00:59.
* @stable ICU 3.0
*/
UDAT_HOUR_OF_DAY0_FIELD = 5,
/**
* FieldPosition and UFieldPosition selector for 'm' field alignment,
* corresponding to the UCAL_MINUTE field.
* @stable ICU 3.0
*/
UDAT_MINUTE_FIELD = 6,
/**
* FieldPosition and UFieldPosition selector for 's' field alignment,
* corresponding to the UCAL_SECOND field.
* @stable ICU 3.0
*/
UDAT_SECOND_FIELD = 7,
/**
* FieldPosition and UFieldPosition selector for 'S' field alignment,
* corresponding to the UCAL_MILLISECOND field.
* @stable ICU 3.0
*/
UDAT_FRACTIONAL_SECOND_FIELD = 8,
/**
* FieldPosition and UFieldPosition selector for 'E' field alignment,
* corresponding to the UCAL_DAY_OF_WEEK field.
* @stable ICU 3.0
*/
UDAT_DAY_OF_WEEK_FIELD = 9,
/**
* FieldPosition and UFieldPosition selector for 'D' field alignment,
* corresponding to the UCAL_DAY_OF_YEAR field.
* @stable ICU 3.0
*/
UDAT_DAY_OF_YEAR_FIELD = 10,
/**
* FieldPosition and UFieldPosition selector for 'F' field alignment,
* corresponding to the UCAL_DAY_OF_WEEK_IN_MONTH field.
* @stable ICU 3.0
*/
UDAT_DAY_OF_WEEK_IN_MONTH_FIELD = 11,
/**
* FieldPosition and UFieldPosition selector for 'w' field alignment,
* corresponding to the UCAL_WEEK_OF_YEAR field.
* @stable ICU 3.0
*/
UDAT_WEEK_OF_YEAR_FIELD = 12,
/**
* FieldPosition and UFieldPosition selector for 'W' field alignment,
* corresponding to the UCAL_WEEK_OF_MONTH field.
* @stable ICU 3.0
*/
UDAT_WEEK_OF_MONTH_FIELD = 13,
/**
* FieldPosition and UFieldPosition selector for 'a' field alignment,
* corresponding to the UCAL_AM_PM field.
* @stable ICU 3.0
*/
UDAT_AM_PM_FIELD = 14,
/**
* FieldPosition and UFieldPosition selector for 'h' field alignment,
* corresponding to the UCAL_HOUR field.
* UDAT_HOUR1_FIELD is used for the one-based 12-hour clock.
* For example, 11:30 PM + 1 hour results in 12:30 AM.
* @stable ICU 3.0
*/
UDAT_HOUR1_FIELD = 15,
/**
* FieldPosition and UFieldPosition selector for 'K' field alignment,
* corresponding to the UCAL_HOUR field.
* UDAT_HOUR0_FIELD is used for the zero-based 12-hour clock.
* For example, 11:30 PM + 1 hour results in 00:30 AM.
* @stable ICU 3.0
*/
UDAT_HOUR0_FIELD = 16,
/**
* FieldPosition and UFieldPosition selector for 'z' field alignment,
* corresponding to the UCAL_ZONE_OFFSET and
* UCAL_DST_OFFSET fields.
* @stable ICU 3.0
*/
UDAT_TIMEZONE_FIELD = 17,
/**
* FieldPosition and UFieldPosition selector for 'Y' field alignment,
* corresponding to the UCAL_YEAR_WOY field.
* @stable ICU 3.0
*/
UDAT_YEAR_WOY_FIELD = 18,
/**
* FieldPosition and UFieldPosition selector for 'e' field alignment,
* corresponding to the UCAL_DOW_LOCAL field.
* @stable ICU 3.0
*/
UDAT_DOW_LOCAL_FIELD = 19,
/**
* FieldPosition and UFieldPosition selector for 'u' field alignment,
* corresponding to the UCAL_EXTENDED_YEAR field.
* @stable ICU 3.0
*/
UDAT_EXTENDED_YEAR_FIELD = 20,
/**
* FieldPosition and UFieldPosition selector for 'g' field alignment,
* corresponding to the UCAL_JULIAN_DAY field.
* @stable ICU 3.0
*/
UDAT_JULIAN_DAY_FIELD = 21,
/**
* FieldPosition and UFieldPosition selector for 'A' field alignment,
* corresponding to the UCAL_MILLISECONDS_IN_DAY field.
* @stable ICU 3.0
*/
UDAT_MILLISECONDS_IN_DAY_FIELD = 22,
/**
* FieldPosition and UFieldPosition selector for 'Z' field alignment,
* corresponding to the UCAL_ZONE_OFFSET and
* UCAL_DST_OFFSET fields.
* @stable ICU 3.0
*/
UDAT_TIMEZONE_RFC_FIELD = 23,
/**
* FieldPosition and UFieldPosition selector for 'v' field alignment,
* corresponding to the UCAL_ZONE_OFFSET field.
* @stable ICU 3.4
*/
UDAT_TIMEZONE_GENERIC_FIELD = 24,
/**
* FieldPosition selector for 'c' field alignment,
* corresponding to the {@link #UCAL_DATE} field.
* This displays the stand alone day name, if available.
* @stable ICU 3.4
*/
UDAT_STANDALONE_DAY_FIELD = 25,
/**
* FieldPosition selector for 'L' field alignment,
* corresponding to the {@link #UCAL_MONTH} field.
* This displays the stand alone month name, if available.
* @stable ICU 3.4
*/
UDAT_STANDALONE_MONTH_FIELD = 26,
/**
* FieldPosition selector for "Q" field alignment,
* corresponding to quarters. This is implemented
* using the {@link #UCAL_MONTH} field. This
* displays the quarter.
* @stable ICU 3.6
*/
UDAT_QUARTER_FIELD = 27,
/**
* FieldPosition selector for the "q" field alignment,
* corresponding to stand-alone quarters. This is
* implemented using the {@link #UCAL_MONTH} field.
* This displays the stand-alone quarter.
* @stable ICU 3.6
*/
UDAT_STANDALONE_QUARTER_FIELD = 28,
/**
* FieldPosition and UFieldPosition selector for 'V' field alignment,
* corresponding to the UCAL_ZONE_OFFSET field.
* @stable ICU 3.8
*/
UDAT_TIMEZONE_SPECIAL_FIELD = 29,
/**
* Number of FieldPosition and UFieldPosition selectors for
* DateFormat and UDateFormat.
* Valid selectors range from 0 to UDAT_FIELD_COUNT-1.
* This value is subject to change if new fields are defined
* in the future.
* @stable ICU 3.0
*/
UDAT_FIELD_COUNT = 30
} UDateFormatField;
/**
* 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)
* @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
* @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_STABLE 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_STABLE void U_EXPORT2
udat_close(UDateFormat* format);
/**
* 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_STABLE UDateFormat* U_EXPORT2
udat_clone(const UDateFormat *fmt,
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 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_STABLE int32_t U_EXPORT2
udat_format( const UDateFormat* format,
UDate dateToFormat,
UChar* result,
int32_t resultLength,
UFieldPosition* position,
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 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_STABLE 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 The calendar in which to store the parsed data.
* @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_STABLE 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_STABLE 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_STABLE 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_STABLE 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_STABLE 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_STABLE const UNumberFormat* U_EXPORT2
udat_getNumberFormat(const UDateFormat* fmt);
/**
* Set 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 numberFormatToSet A pointer to the UNumberFormat to be used by fmt to format numbers.
* @see udat_getNumberFormat
* @stable ICU 2.0
*/
U_STABLE void U_EXPORT2
udat_setNumberFormat( UDateFormat* fmt,
const UNumberFormat* numberFormatToSet);
/**
* 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_STABLE 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_STABLE 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_STABLE 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_STABLE 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_STABLE 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_STABLE 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
*/
typedef enum UDateFormatSymbolType {
/** The era names, for example AD */
UDAT_ERAS,
/** The month names, for example February */
UDAT_MONTHS,
/** The short month names, for example Feb. */
UDAT_SHORT_MONTHS,
/** The weekday names, for example Monday */
UDAT_WEEKDAYS,
/** The short weekday names, for example Mon. */
UDAT_SHORT_WEEKDAYS,
/** The AM/PM names, for example AM */
UDAT_AM_PMS,
/** The localized characters */
UDAT_LOCALIZED_CHARS,
/** The long era names, for example Anno Domini */
UDAT_ERA_NAMES,
/** The narrow month names, for example F */
UDAT_NARROW_MONTHS,
/** The narrow weekday names, for example N */
UDAT_NARROW_WEEKDAYS,
/** Standalone context versions of months */
UDAT_STANDALONE_MONTHS,
UDAT_STANDALONE_SHORT_MONTHS,
UDAT_STANDALONE_NARROW_MONTHS,
/** Standalone context versions of weekdays */
UDAT_STANDALONE_WEEKDAYS,
UDAT_STANDALONE_SHORT_WEEKDAYS,
UDAT_STANDALONE_NARROW_WEEKDAYS,
/** The quarters, for example 1st Quarter */
UDAT_QUARTERS,
/** The short quarter names, for example Q1 */
UDAT_SHORT_QUARTERS,
/** Standalone context versions of quarters */
UDAT_STANDALONE_QUARTERS,
UDAT_STANDALONE_SHORT_QUARTERS
} UDateFormatSymbolType;
struct UDateFormatSymbols;
/** Date format symbols.
* For usage in C programs.
* @stable ICU 2.6
*/
typedef struct UDateFormatSymbols 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_STABLE 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 detemining 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_STABLE 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_STABLE 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_STABLE const char* U_EXPORT2
udat_getLocaleByType(const UDateFormat *fmt,
ULocDataLocaleType type,
UErrorCode* status);
/**
* 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_INTERNAL 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_INTERNAL 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_INTERNAL void U_EXPORT2
udat_applyPatternRelative(UDateFormat *format,
const UChar *datePattern,
int32_t datePatternLength,
const UChar *timePattern,
int32_t timePatternLength,
UErrorCode *status);
#endif /* #if !UCONFIG_NO_FORMATTING */
#endif
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