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udat.h File Reference

C API: DateFormat. More...

#include "unicode/utypes.h"
#include "unicode/localpointer.h"
#include "unicode/ucal.h"
#include "unicode/unum.h"
#include "unicode/udisplaycontext.h"

Go to the source code of this file.

Namespaces

 icu
 File coll.h.
 

Macros

#define UDAT_YEAR   "y"
 Constant for date skeleton with year. More...
 
#define UDAT_QUARTER   "QQQQ"
 Constant for date skeleton with quarter. More...
 
#define UDAT_ABBR_QUARTER   "QQQ"
 Constant for date skeleton with abbreviated quarter. More...
 
#define UDAT_YEAR_QUARTER   "yQQQQ"
 Constant for date skeleton with year and quarter. More...
 
#define UDAT_YEAR_ABBR_QUARTER   "yQQQ"
 Constant for date skeleton with year and abbreviated quarter. More...
 
#define UDAT_MONTH   "MMMM"
 Constant for date skeleton with month. More...
 
#define UDAT_ABBR_MONTH   "MMM"
 Constant for date skeleton with abbreviated month. More...
 
#define UDAT_NUM_MONTH   "M"
 Constant for date skeleton with numeric month. More...
 
#define UDAT_YEAR_MONTH   "yMMMM"
 Constant for date skeleton with year and month. More...
 
#define UDAT_YEAR_ABBR_MONTH   "yMMM"
 Constant for date skeleton with year and abbreviated month. More...
 
#define UDAT_YEAR_NUM_MONTH   "yM"
 Constant for date skeleton with year and numeric month. More...
 
#define UDAT_DAY   "d"
 Constant for date skeleton with day. More...
 
#define UDAT_YEAR_MONTH_DAY   "yMMMMd"
 Constant for date skeleton with year, month, and day. More...
 
#define UDAT_YEAR_ABBR_MONTH_DAY   "yMMMd"
 Constant for date skeleton with year, abbreviated month, and day. More...
 
#define UDAT_YEAR_NUM_MONTH_DAY   "yMd"
 Constant for date skeleton with year, numeric month, and day. More...
 
#define UDAT_WEEKDAY   "EEEE"
 Constant for date skeleton with weekday. More...
 
#define UDAT_ABBR_WEEKDAY   "E"
 Constant for date skeleton with abbreviated weekday. More...
 
#define UDAT_YEAR_MONTH_WEEKDAY_DAY   "yMMMMEEEEd"
 Constant for date skeleton with year, month, weekday, and day. More...
 
#define UDAT_YEAR_ABBR_MONTH_WEEKDAY_DAY   "yMMMEd"
 Constant for date skeleton with year, abbreviated month, weekday, and day. More...
 
#define UDAT_YEAR_NUM_MONTH_WEEKDAY_DAY   "yMEd"
 Constant for date skeleton with year, numeric month, weekday, and day. More...
 
#define UDAT_MONTH_DAY   "MMMMd"
 Constant for date skeleton with long month and day. More...
 
#define UDAT_ABBR_MONTH_DAY   "MMMd"
 Constant for date skeleton with abbreviated month and day. More...
 
#define UDAT_NUM_MONTH_DAY   "Md"
 Constant for date skeleton with numeric month and day. More...
 
#define UDAT_MONTH_WEEKDAY_DAY   "MMMMEEEEd"
 Constant for date skeleton with month, weekday, and day. More...
 
#define UDAT_ABBR_MONTH_WEEKDAY_DAY   "MMMEd"
 Constant for date skeleton with abbreviated month, weekday, and day. More...
 
#define UDAT_NUM_MONTH_WEEKDAY_DAY   "MEd"
 Constant for date skeleton with numeric month, weekday, and day. More...
 
#define UDAT_HOUR   "j"
 Constant for date skeleton with hour, with the locale's preferred hour format (12 or 24). More...
 
#define UDAT_HOUR24   "H"
 Constant for date skeleton with hour in 24-hour presentation. More...
 
#define UDAT_MINUTE   "m"
 Constant for date skeleton with minute. More...
 
#define UDAT_HOUR_MINUTE   "jm"
 Constant for date skeleton with hour and minute, with the locale's preferred hour format (12 or 24). More...
 
#define UDAT_HOUR24_MINUTE   "Hm"
 Constant for date skeleton with hour and minute in 24-hour presentation. More...
 
#define UDAT_SECOND   "s"
 Constant for date skeleton with second. More...
 
#define UDAT_HOUR_MINUTE_SECOND   "jms"
 Constant for date skeleton with hour, minute, and second, with the locale's preferred hour format (12 or 24). More...
 
#define UDAT_HOUR24_MINUTE_SECOND   "Hms"
 Constant for date skeleton with hour, minute, and second in 24-hour presentation. More...
 
#define UDAT_MINUTE_SECOND   "ms"
 Constant for date skeleton with minute and second. More...
 
#define UDAT_LOCATION_TZ   "VVVV"
 Constant for generic location format, such as Los Angeles Time; used in combinations date + time + zone, or time + zone. More...
 
#define UDAT_GENERIC_TZ   "vvvv"
 Constant for generic non-location format, such as Pacific Time; used in combinations date + time + zone, or time + zone. More...
 
#define UDAT_ABBR_GENERIC_TZ   "v"
 Constant for generic non-location format, abbreviated if possible, such as PT; used in combinations date + time + zone, or time + zone. More...
 
#define UDAT_SPECIFIC_TZ   "zzzz"
 Constant for specific non-location format, such as Pacific Daylight Time; used in combinations date + time + zone, or time + zone. More...
 
#define UDAT_ABBR_SPECIFIC_TZ   "z"
 Constant for specific non-location format, abbreviated if possible, such as PDT; used in combinations date + time + zone, or time + zone. More...
 
#define UDAT_ABBR_UTC_TZ   "ZZZZ"
 Constant for localized GMT/UTC format, such as GMT+8:00 or HPG-8:00; used in combinations date + time + zone, or time + zone. More...
 
#define UDAT_STANDALONE_MONTH   "LLLL"
 Constant for date skeleton with standalone month. More...
 
#define UDAT_ABBR_STANDALONE_MONTH   "LLL"
 Constant for date skeleton with standalone abbreviated month. More...
 
#define UDAT_HOUR_MINUTE_GENERIC_TZ   "jmv"
 Constant for date skeleton with hour, minute, and generic timezone. More...
 
#define UDAT_HOUR_MINUTE_TZ   "jmz"
 Constant for date skeleton with hour, minute, and timezone. More...
 
#define UDAT_HOUR_GENERIC_TZ   "jv"
 Constant for date skeleton with hour and generic timezone. More...
 
#define UDAT_HOUR_TZ   "jz"
 Constant for date skeleton with hour and timezone. More...
 

Typedefs

typedef void * UDateFormat
 A date formatter. More...
 
typedef enum UDateFormatStyle UDateFormatStyle
 The possible date/time format styles. More...
 
typedef enum UDateFormatField UDateFormatField
 FieldPosition and UFieldPosition selectors for format fields defined by DateFormat and UDateFormat. More...
 
typedef enum
UDateFormatBooleanAttribute 
UDateFormatBooleanAttribute
 DateFormat boolean attributes. More...
 
typedef enum UDateFormatSymbolType UDateFormatSymbolType
 The possible types of date format symbols. More...
 
typedef struct UDateFormatSymbols UDateFormatSymbols
 Date format symbols. More...
 
typedef UDateFormat *(* UDateFormatOpener )(UDateFormatStyle timeStyle, UDateFormatStyle dateStyle, const char *locale, const UChar *tzID, int32_t tzIDLength, const UChar *pattern, int32_t patternLength, UErrorCode *status)
 

Enumerations

enum  UDateFormatStyle {
  UDAT_FULL, UDAT_LONG, UDAT_MEDIUM, UDAT_SHORT,
  UDAT_DEFAULT = UDAT_MEDIUM, 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, UDAT_NONE = -1, UDAT_PATTERN = -2,
  UDAT_IGNORE = UDAT_PATTERN
}
 The possible date/time format styles. More...
 
enum  UDateFormatField {
  UDAT_ERA_FIELD = 0, UDAT_YEAR_FIELD = 1, UDAT_MONTH_FIELD = 2, UDAT_DATE_FIELD = 3,
  UDAT_HOUR_OF_DAY1_FIELD = 4, UDAT_HOUR_OF_DAY0_FIELD = 5, UDAT_MINUTE_FIELD = 6, UDAT_SECOND_FIELD = 7,
  UDAT_FRACTIONAL_SECOND_FIELD = 8, UDAT_DAY_OF_WEEK_FIELD = 9, UDAT_DAY_OF_YEAR_FIELD = 10, UDAT_DAY_OF_WEEK_IN_MONTH_FIELD = 11,
  UDAT_WEEK_OF_YEAR_FIELD = 12, UDAT_WEEK_OF_MONTH_FIELD = 13, UDAT_AM_PM_FIELD = 14, UDAT_HOUR1_FIELD = 15,
  UDAT_HOUR0_FIELD = 16, UDAT_TIMEZONE_FIELD = 17, UDAT_YEAR_WOY_FIELD = 18, UDAT_DOW_LOCAL_FIELD = 19,
  UDAT_EXTENDED_YEAR_FIELD = 20, UDAT_JULIAN_DAY_FIELD = 21, UDAT_MILLISECONDS_IN_DAY_FIELD = 22, UDAT_TIMEZONE_RFC_FIELD = 23,
  UDAT_TIMEZONE_GENERIC_FIELD = 24, UDAT_STANDALONE_DAY_FIELD = 25, UDAT_STANDALONE_MONTH_FIELD = 26, UDAT_QUARTER_FIELD = 27,
  UDAT_STANDALONE_QUARTER_FIELD = 28, UDAT_TIMEZONE_SPECIAL_FIELD = 29, UDAT_YEAR_NAME_FIELD = 30, UDAT_TIMEZONE_LOCALIZED_GMT_OFFSET_FIELD = 31,
  UDAT_TIMEZONE_ISO_FIELD = 32, UDAT_TIMEZONE_ISO_LOCAL_FIELD = 33, UDAT_RELATED_YEAR_FIELD = 34, UDAT_FIELD_COUNT = 35
}
 FieldPosition and UFieldPosition selectors for format fields defined by DateFormat and UDateFormat. More...
 
enum  UDateFormatBooleanAttribute {
  UDAT_PARSE_ALLOW_WHITESPACE = 0, UDAT_PARSE_ALLOW_NUMERIC = 1, UDAT_PARSE_PARTIAL_MATCH = 2, UDAT_PARSE_MULTIPLE_PATTERNS_FOR_MATCH = 3,
  UDAT_BOOLEAN_ATTRIBUTE_COUNT = 4
}
 DateFormat boolean attributes. More...
 
enum  UDateFormatSymbolType {
  UDAT_ERAS, UDAT_MONTHS, UDAT_SHORT_MONTHS, UDAT_WEEKDAYS,
  UDAT_SHORT_WEEKDAYS, UDAT_AM_PMS, UDAT_LOCALIZED_CHARS, UDAT_ERA_NAMES,
  UDAT_NARROW_MONTHS, UDAT_NARROW_WEEKDAYS, UDAT_STANDALONE_MONTHS, UDAT_STANDALONE_SHORT_MONTHS,
  UDAT_STANDALONE_NARROW_MONTHS, UDAT_STANDALONE_WEEKDAYS, UDAT_STANDALONE_SHORT_WEEKDAYS, UDAT_STANDALONE_NARROW_WEEKDAYS,
  UDAT_QUARTERS, UDAT_SHORT_QUARTERS, UDAT_STANDALONE_QUARTERS, UDAT_STANDALONE_SHORT_QUARTERS,
  UDAT_SHORTER_WEEKDAYS, UDAT_STANDALONE_SHORTER_WEEKDAYS
}
 The possible types of date format symbols. More...
 

Functions

UCalendarDateFields udat_toCalendarDateField (UDateFormatField field)
 Maps from a UDateFormatField to the corresponding UCalendarDateFields. More...
 
UDateFormatudat_open (UDateFormatStyle timeStyle, UDateFormatStyle dateStyle, const char *locale, const UChar *tzID, int32_t tzIDLength, const UChar *pattern, int32_t patternLength, UErrorCode *status)
 Open a new UDateFormat for formatting and parsing dates and times. More...
 
void udat_close (UDateFormat *format)
 Close a UDateFormat. More...
 
UBool udat_getBooleanAttribute (const UDateFormat *fmt, UDateFormatBooleanAttribute attr, UErrorCode *status)
 Get a boolean attribute associated with a UDateFormat. More...
 
void udat_setBooleanAttribute (UDateFormat *fmt, UDateFormatBooleanAttribute attr, UBool newValue, UErrorCode *status)
 Set a boolean attribute associated with a UDateFormat. More...
 
UDateFormatudat_clone (const UDateFormat *fmt, UErrorCode *status)
 Open a copy of a UDateFormat. More...
 
int32_t udat_format (const UDateFormat *format, UDate dateToFormat, UChar *result, int32_t resultLength, UFieldPosition *position, UErrorCode *status)
 Format a date using an UDateFormat. More...
 
UDate 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. More...
 
void udat_parseCalendar (const UDateFormat *format, UCalendar *calendar, const UChar *text, int32_t textLength, int32_t *parsePos, UErrorCode *status)
 Parse a string into an date/time using a UDateFormat. More...
 
UBool udat_isLenient (const UDateFormat *fmt)
 Determine if an UDateFormat will perform lenient parsing. More...
 
void udat_setLenient (UDateFormat *fmt, UBool isLenient)
 Specify whether an UDateFormat will perform lenient parsing. More...
 
const UCalendarudat_getCalendar (const UDateFormat *fmt)
 Get the UCalendar associated with an UDateFormat. More...
 
void udat_setCalendar (UDateFormat *fmt, const UCalendar *calendarToSet)
 Set the UCalendar associated with an UDateFormat. More...
 
const UNumberFormatudat_getNumberFormat (const UDateFormat *fmt)
 Get the UNumberFormat associated with an UDateFormat. More...
 
void udat_setNumberFormat (UDateFormat *fmt, const UNumberFormat *numberFormatToSet)
 Set the UNumberFormat associated with an UDateFormat. More...
 
const char * udat_getAvailable (int32_t localeIndex)
 Get a locale for which date/time formatting patterns are available. More...
 
int32_t udat_countAvailable (void)
 Determine how many locales have date/time formatting patterns available. More...
 
UDate udat_get2DigitYearStart (const UDateFormat *fmt, UErrorCode *status)
 Get the year relative to which all 2-digit years are interpreted. More...
 
void udat_set2DigitYearStart (UDateFormat *fmt, UDate d, UErrorCode *status)
 Set the year relative to which all 2-digit years will be interpreted. More...
 
int32_t udat_toPattern (const UDateFormat *fmt, UBool localized, UChar *result, int32_t resultLength, UErrorCode *status)
 Extract the pattern from a UDateFormat. More...
 
void udat_applyPattern (UDateFormat *format, UBool localized, const UChar *pattern, int32_t patternLength)
 Set the pattern used by an UDateFormat. More...
 
int32_t udat_getSymbols (const UDateFormat *fmt, UDateFormatSymbolType type, int32_t symbolIndex, UChar *result, int32_t resultLength, UErrorCode *status)
 Get the symbols associated with an UDateFormat. More...
 
int32_t udat_countSymbols (const UDateFormat *fmt, UDateFormatSymbolType type)
 Count the number of particular symbols for an UDateFormat. More...
 
void udat_setSymbols (UDateFormat *format, UDateFormatSymbolType type, int32_t symbolIndex, UChar *value, int32_t valueLength, UErrorCode *status)
 Set the symbols associated with an UDateFormat. More...
 
const char * udat_getLocaleByType (const UDateFormat *fmt, ULocDataLocaleType type, UErrorCode *status)
 Get the locale for this date format object. More...
 
void udat_setContext (UDateFormat *fmt, UDisplayContext value, UErrorCode *status)
 Set a particular UDisplayContext value in the formatter, such as UDISPCTX_CAPITALIZATION_FOR_STANDALONE. More...
 
UDisplayContext udat_getContext (const UDateFormat *fmt, UDisplayContextType type, UErrorCode *status)
 Get the formatter's UDisplayContext value for the specified UDisplayContextType, such as UDISPCTX_TYPE_CAPITALIZATION. More...
 
int32_t udat_toPatternRelativeDate (const UDateFormat *fmt, UChar *result, int32_t resultLength, UErrorCode *status)
 Extract the date pattern from a UDateFormat set for relative date formatting. More...
 
int32_t udat_toPatternRelativeTime (const UDateFormat *fmt, UChar *result, int32_t resultLength, UErrorCode *status)
 Extract the time pattern from a UDateFormat set for relative date formatting. More...
 
void udat_applyPatternRelative (UDateFormat *format, const UChar *datePattern, int32_t datePatternLength, const UChar *timePattern, int32_t timePatternLength, UErrorCode *status)
 Set the date & time patterns used by a UDateFormat set for relative date formatting. More...
 
void udat_registerOpener (UDateFormatOpener opener, UErrorCode *status)
 Register a provider factory. More...
 
UDateFormatOpener udat_unregisterOpener (UDateFormatOpener opener, UErrorCode *status)
 Un-Register a provider factory. More...
 

Detailed Description

C API: DateFormat.

Date Format C API

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.

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.

To format a date for the current Locale with default time and date style, use one of the static factory methods:

UChar *myString;
int32_t myStrlen = 0;
myStrlen = udat_format(dfmt, myDate, NULL, myStrlen, NULL, &status);
status=U_ZERO_ERROR;
myString=(UChar*)malloc(sizeof(UChar) * (myStrlen+1) );
udat_format(dfmt, myDate, myString, myStrlen+1, NULL, &status);
}

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.

int32_t i, myStrlen = 0;
UChar* myString;
char buffer[1024];
UDate myDateArr[] = { 0.0, 100000000.0, 2000000000.0 }; // test values
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);
}
}

To get specific fields of a date, you can use UFieldPosition to get specific fields.

UChar *myString;
int32_t myStrlen = 0;
char buffer[1024];
pos.field = 1; // Same as the DateFormat::EField enum
myStrlen = udat_format(dfmt, myDate, NULL, myStrlen, &pos, &status);
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]);

To format a date for a different Locale, specify it in the call to udat_open()

UDateFormat* df = udat_open(UDAT_SHORT, UDAT_SHORT, "fr_FR", NULL, -1, NULL, 0, &status);

You can use a DateFormat API udat_parse() to parse.

int32_t parsepos=0;
UDate myDate = udat_parse(df, myString, u_strlen(myString), &parsepos, &status);

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

You can also set the time zone on the format if you wish.

You can also use forms of the parse and format methods with Parse Position and UFieldPosition to allow you to

Date and Time Patterns:

Date and time formats are specified by date and time pattern strings. Within date and time pattern strings, all unquoted ASCII letters [A-Za-z] are reserved as pattern letters representing calendar fields. UDateFormat supports the date and time formatting algorithm and pattern letters defined by UTS#35 Unicode Locale Data Markup Language (LDML) and further documented for ICU in the ICU User Guide.

Definition in file udat.h.

Macro Definition Documentation

#define UDAT_ABBR_GENERIC_TZ   "v"

Constant for generic non-location format, abbreviated if possible, such as PT; used in combinations date + time + zone, or time + zone.

See Also
LDML Date Format Patterns
LDML Time Zone Fallback
Stable:
ICU 51

Definition at line 420 of file udat.h.

#define UDAT_ABBR_MONTH   "MMM"

Constant for date skeleton with abbreviated month.

Stable:
ICU 4.0

Definition at line 231 of file udat.h.

#define UDAT_ABBR_MONTH_DAY   "MMMd"

Constant for date skeleton with abbreviated month and day.

Used in combinations date + time, date + time + zone, or time + zone.

Stable:
ICU 4.0

Definition at line 314 of file udat.h.

#define UDAT_ABBR_MONTH_WEEKDAY_DAY   "MMMEd"

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

Definition at line 332 of file udat.h.

#define UDAT_ABBR_QUARTER   "QQQ"

Constant for date skeleton with abbreviated quarter.

Stable:
ICU 51

Definition at line 211 of file udat.h.

#define UDAT_ABBR_SPECIFIC_TZ   "z"

Constant for specific non-location format, abbreviated if possible, such as PDT; used in combinations date + time + zone, or time + zone.

See Also
LDML Date Format Patterns
LDML Time Zone Fallback
Stable:
ICU 51

Definition at line 436 of file udat.h.

#define UDAT_ABBR_STANDALONE_MONTH   "LLL"

Constant for date skeleton with standalone abbreviated month.

Deprecated:
ICU 50 Use UDAT_ABBR_MONTH instead.

Definition at line 458 of file udat.h.

#define UDAT_ABBR_UTC_TZ   "ZZZZ"

Constant for localized GMT/UTC format, such as GMT+8:00 or HPG-8:00; used in combinations date + time + zone, or time + zone.

See Also
LDML Date Format Patterns
LDML Time Zone Fallback
Stable:
ICU 51

Definition at line 444 of file udat.h.

#define UDAT_ABBR_WEEKDAY   "E"

Constant for date skeleton with abbreviated weekday.

Stable:
ICU 51

Definition at line 284 of file udat.h.

#define UDAT_DAY   "d"

Constant for date skeleton with day.

Stable:
ICU 4.0

Definition at line 256 of file udat.h.

#define UDAT_GENERIC_TZ   "vvvv"

Constant for generic non-location format, such as Pacific Time; used in combinations date + time + zone, or time + zone.

See Also
LDML Date Format Patterns
LDML Time Zone Fallback
Stable:
ICU 51

Definition at line 412 of file udat.h.

#define UDAT_HOUR   "j"

Constant for date skeleton with hour, with the locale's preferred hour format (12 or 24).

Stable:
ICU 4.0

Definition at line 346 of file udat.h.

#define UDAT_HOUR24   "H"

Constant for date skeleton with hour in 24-hour presentation.

Stable:
ICU 51

Definition at line 351 of file udat.h.

#define UDAT_HOUR24_MINUTE   "Hm"

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

Definition at line 368 of file udat.h.

#define UDAT_HOUR24_MINUTE_SECOND   "Hms"

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

Definition at line 387 of file udat.h.

#define UDAT_HOUR_GENERIC_TZ   "jv"

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.

Definition at line 474 of file udat.h.

#define UDAT_HOUR_MINUTE   "jm"

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

Definition at line 362 of file udat.h.

#define UDAT_HOUR_MINUTE_GENERIC_TZ   "jmv"

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.

Definition at line 464 of file udat.h.

#define UDAT_HOUR_MINUTE_SECOND   "jms"

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

Definition at line 380 of file udat.h.

#define UDAT_HOUR_MINUTE_TZ   "jmz"

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.

Definition at line 469 of file udat.h.

#define UDAT_HOUR_TZ   "jz"

Constant for date skeleton with hour and timezone.

Deprecated:
ICU 50 Use instead UDAT_HOUR UDAT_ABBR_SPECIFIC_TZ or some other timezone presentation.

Definition at line 479 of file udat.h.

#define UDAT_LOCATION_TZ   "VVVV"

Constant for generic location format, such as Los Angeles Time; used in combinations date + time + zone, or time + zone.

See Also
LDML Date Format Patterns
LDML Time Zone Fallback
Stable:
ICU 51

Definition at line 404 of file udat.h.

#define UDAT_MINUTE   "m"

Constant for date skeleton with minute.

Stable:
ICU 51

Definition at line 356 of file udat.h.

#define UDAT_MINUTE_SECOND   "ms"

Constant for date skeleton with minute and second.

Used in combinations date + time, date + time + zone, or time + zone.

Stable:
ICU 4.0

Definition at line 393 of file udat.h.

#define UDAT_MONTH   "MMMM"

Constant for date skeleton with month.

Stable:
ICU 4.0

Definition at line 226 of file udat.h.

#define UDAT_MONTH_DAY   "MMMMd"

Constant for date skeleton with long month and day.

Used in combinations date + time, date + time + zone, or time + zone.

Stable:
ICU 4.0

Definition at line 308 of file udat.h.

#define UDAT_MONTH_WEEKDAY_DAY   "MMMMEEEEd"

Constant for date skeleton with month, weekday, and day.

Used in combinations date + time, date + time + zone, or time + zone.

Stable:
ICU 4.0

Definition at line 326 of file udat.h.

#define UDAT_NUM_MONTH   "M"

Constant for date skeleton with numeric month.

Stable:
ICU 4.0

Definition at line 236 of file udat.h.

#define UDAT_NUM_MONTH_DAY   "Md"

Constant for date skeleton with numeric month and day.

Used in combinations date + time, date + time + zone, or time + zone.

Stable:
ICU 4.0

Definition at line 320 of file udat.h.

#define UDAT_NUM_MONTH_WEEKDAY_DAY   "MEd"

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

Definition at line 338 of file udat.h.

#define UDAT_QUARTER   "QQQQ"

Constant for date skeleton with quarter.

Stable:
ICU 51

Definition at line 206 of file udat.h.

#define UDAT_SECOND   "s"

Constant for date skeleton with second.

Stable:
ICU 51

Definition at line 373 of file udat.h.

#define UDAT_SPECIFIC_TZ   "zzzz"

Constant for specific non-location format, such as Pacific Daylight Time; used in combinations date + time + zone, or time + zone.

See Also
LDML Date Format Patterns
LDML Time Zone Fallback
Stable:
ICU 51

Definition at line 428 of file udat.h.

#define UDAT_STANDALONE_MONTH   "LLLL"

Constant for date skeleton with standalone month.

Deprecated:
ICU 50 Use UDAT_MONTH instead.

Definition at line 453 of file udat.h.

#define UDAT_WEEKDAY   "EEEE"

Constant for date skeleton with weekday.

Stable:
ICU 51

Definition at line 279 of file udat.h.

#define UDAT_YEAR   "y"

Constant for date skeleton with year.

Stable:
ICU 4.0

Definition at line 201 of file udat.h.

#define UDAT_YEAR_ABBR_MONTH   "yMMM"

Constant for date skeleton with year and abbreviated month.

Stable:
ICU 4.0

Definition at line 246 of file udat.h.

#define UDAT_YEAR_ABBR_MONTH_DAY   "yMMMd"

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

Definition at line 268 of file udat.h.

#define UDAT_YEAR_ABBR_MONTH_WEEKDAY_DAY   "yMMMEd"

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

Definition at line 296 of file udat.h.

#define UDAT_YEAR_ABBR_QUARTER   "yQQQ"

Constant for date skeleton with year and abbreviated quarter.

Stable:
ICU 4.0

Definition at line 221 of file udat.h.

#define UDAT_YEAR_MONTH   "yMMMM"

Constant for date skeleton with year and month.

Stable:
ICU 4.0

Definition at line 241 of file udat.h.

#define UDAT_YEAR_MONTH_DAY   "yMMMMd"

Constant for date skeleton with year, month, and day.

Used in combinations date + time, date + time + zone, or time + zone.

Stable:
ICU 4.0

Definition at line 262 of file udat.h.

#define UDAT_YEAR_MONTH_WEEKDAY_DAY   "yMMMMEEEEd"

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

Definition at line 290 of file udat.h.

#define UDAT_YEAR_NUM_MONTH   "yM"

Constant for date skeleton with year and numeric month.

Stable:
ICU 4.0

Definition at line 251 of file udat.h.

#define UDAT_YEAR_NUM_MONTH_DAY   "yMd"

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

Definition at line 274 of file udat.h.

#define UDAT_YEAR_NUM_MONTH_WEEKDAY_DAY   "yMEd"

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

Definition at line 302 of file udat.h.

#define UDAT_YEAR_QUARTER   "yQQQQ"

Constant for date skeleton with year and quarter.

Stable:
ICU 4.0

Definition at line 216 of file udat.h.

Typedef Documentation

typedef void* UDateFormat

A date formatter.

For usage in C programs.

Stable:
ICU 2.6

Definition at line 150 of file udat.h.

DateFormat boolean attributes.

Draft:
This API may be changed in the future versions and was introduced in ICU 53

FieldPosition and UFieldPosition selectors for format fields defined by DateFormat and UDateFormat.

Stable:
ICU 3.0
typedef UDateFormat*( * UDateFormatOpener)(UDateFormatStyle timeStyle, UDateFormatStyle dateStyle, const char *locale, const UChar *tzID, int32_t tzIDLength, const UChar *pattern, int32_t patternLength, UErrorCode *status)
Internal:
Do not use. This API is for internal use only.
See Also
udat_open

Definition at line 1419 of file udat.h.

The possible date/time format styles.

Stable:
ICU 2.6

Date format symbols.

For usage in C programs.

Stable:
ICU 2.6

Definition at line 1255 of file udat.h.

The possible types of date format symbols.

Stable:
ICU 2.6

Enumeration Type Documentation

DateFormat boolean attributes.

Draft:
This API may be changed in the future versions and was introduced in ICU 53
Enumerator
UDAT_PARSE_ALLOW_WHITESPACE 

indicates whether whitespace is allowed.

Includes trailing dot tolerance.

Draft:
This API may be changed in the future versions and was introduced in ICU 53
UDAT_PARSE_ALLOW_NUMERIC 

indicates tolerance of numeric data when String data may be assumed.

eg: UDAT_YEAR_NAME_FIELD, UDAT_STANDALONE_MONTH_FIELD, UDAT_DAY_OF_WEEK_FIELD

Draft:
This API may be changed in the future versions and was introduced in ICU 53
UDAT_PARSE_PARTIAL_MATCH 

indicates tolerance of a partial literal match

Draft:
This API may be changed in the future versions and was introduced in ICU 53
UDAT_PARSE_MULTIPLE_PATTERNS_FOR_MATCH 

indicates tolerance of pattern mismatch between input data and specified format pattern.

e.g. accepting "September" for a month pattern of MMM ("Sep")

Draft:
This API may be changed in the future versions and was introduced in ICU 53
UDAT_BOOLEAN_ATTRIBUTE_COUNT 

count boolean date format constants

Draft:
This API may be changed in the future versions and was introduced in ICU 53

Definition at line 844 of file udat.h.

FieldPosition and UFieldPosition selectors for format fields defined by DateFormat and UDateFormat.

Stable:
ICU 3.0
Enumerator
UDAT_ERA_FIELD 

FieldPosition and UFieldPosition selector for 'G' field alignment, corresponding to the UCAL_ERA field.

Stable:
ICU 3.0
UDAT_YEAR_FIELD 

FieldPosition and UFieldPosition selector for 'y' field alignment, corresponding to the UCAL_YEAR field.

Stable:
ICU 3.0
UDAT_MONTH_FIELD 

FieldPosition and UFieldPosition selector for 'M' field alignment, corresponding to the UCAL_MONTH field.

Stable:
ICU 3.0
UDAT_DATE_FIELD 

FieldPosition and UFieldPosition selector for 'd' field alignment, corresponding to the UCAL_DATE field.

Stable:
ICU 3.0
UDAT_HOUR_OF_DAY1_FIELD 

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_DAY0_FIELD 

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_MINUTE_FIELD 

FieldPosition and UFieldPosition selector for 'm' field alignment, corresponding to the UCAL_MINUTE field.

Stable:
ICU 3.0
UDAT_SECOND_FIELD 

FieldPosition and UFieldPosition selector for 's' field alignment, corresponding to the UCAL_SECOND field.

Stable:
ICU 3.0
UDAT_FRACTIONAL_SECOND_FIELD 

FieldPosition and UFieldPosition selector for 'S' field alignment, corresponding to the UCAL_MILLISECOND field.

Note: Time formats that use 'S' can display a maximum of three significant digits for fractional seconds, corresponding to millisecond resolution and a fractional seconds sub-pattern of SSS. If the sub-pattern is S or SS, the fractional seconds value will be truncated (not rounded) to the number of display places specified. If the fractional seconds sub-pattern is longer than SSS, the additional display places will be filled with zeros.

Stable:
ICU 3.0
UDAT_DAY_OF_WEEK_FIELD 

FieldPosition and UFieldPosition selector for 'E' field alignment, corresponding to the UCAL_DAY_OF_WEEK field.

Stable:
ICU 3.0
UDAT_DAY_OF_YEAR_FIELD 

FieldPosition and UFieldPosition selector for 'D' field alignment, corresponding to the UCAL_DAY_OF_YEAR field.

Stable:
ICU 3.0
UDAT_DAY_OF_WEEK_IN_MONTH_FIELD 

FieldPosition and UFieldPosition selector for 'F' field alignment, corresponding to the UCAL_DAY_OF_WEEK_IN_MONTH field.

Stable:
ICU 3.0
UDAT_WEEK_OF_YEAR_FIELD 

FieldPosition and UFieldPosition selector for 'w' field alignment, corresponding to the UCAL_WEEK_OF_YEAR field.

Stable:
ICU 3.0
UDAT_WEEK_OF_MONTH_FIELD 

FieldPosition and UFieldPosition selector for 'W' field alignment, corresponding to the UCAL_WEEK_OF_MONTH field.

Stable:
ICU 3.0
UDAT_AM_PM_FIELD 

FieldPosition and UFieldPosition selector for 'a' field alignment, corresponding to the UCAL_AM_PM field.

Stable:
ICU 3.0
UDAT_HOUR1_FIELD 

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_HOUR0_FIELD 

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_TIMEZONE_FIELD 

FieldPosition and UFieldPosition selector for 'z' field alignment, corresponding to the UCAL_ZONE_OFFSET and UCAL_DST_OFFSET fields.

Stable:
ICU 3.0
UDAT_YEAR_WOY_FIELD 

FieldPosition and UFieldPosition selector for 'Y' field alignment, corresponding to the UCAL_YEAR_WOY field.

Stable:
ICU 3.0
UDAT_DOW_LOCAL_FIELD 

FieldPosition and UFieldPosition selector for 'e' field alignment, corresponding to the UCAL_DOW_LOCAL field.

Stable:
ICU 3.0
UDAT_EXTENDED_YEAR_FIELD 

FieldPosition and UFieldPosition selector for 'u' field alignment, corresponding to the UCAL_EXTENDED_YEAR field.

Stable:
ICU 3.0
UDAT_JULIAN_DAY_FIELD 

FieldPosition and UFieldPosition selector for 'g' field alignment, corresponding to the UCAL_JULIAN_DAY field.

Stable:
ICU 3.0
UDAT_MILLISECONDS_IN_DAY_FIELD 

FieldPosition and UFieldPosition selector for 'A' field alignment, corresponding to the UCAL_MILLISECONDS_IN_DAY field.

Stable:
ICU 3.0
UDAT_TIMEZONE_RFC_FIELD 

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_GENERIC_FIELD 

FieldPosition and UFieldPosition selector for 'v' field alignment, corresponding to the UCAL_ZONE_OFFSET field.

Stable:
ICU 3.4
UDAT_STANDALONE_DAY_FIELD 

FieldPosition selector for 'c' field alignment, corresponding to the UCAL_DOW_LOCAL field.

This displays the stand alone day name, if available.

Stable:
ICU 3.4
UDAT_STANDALONE_MONTH_FIELD 

FieldPosition selector for 'L' field alignment, corresponding to the UCAL_MONTH field.

This displays the stand alone month name, if available.

Stable:
ICU 3.4
UDAT_QUARTER_FIELD 

FieldPosition selector for "Q" field alignment, corresponding to quarters.

This is implemented using the UCAL_MONTH field. This displays the quarter.

Stable:
ICU 3.6
UDAT_STANDALONE_QUARTER_FIELD 

FieldPosition selector for the "q" field alignment, corresponding to stand-alone quarters.

This is implemented using the UCAL_MONTH field. This displays the stand-alone quarter.

Stable:
ICU 3.6
UDAT_TIMEZONE_SPECIAL_FIELD 

FieldPosition and UFieldPosition selector for 'V' field alignment, corresponding to the UCAL_ZONE_OFFSET field.

Stable:
ICU 3.8
UDAT_YEAR_NAME_FIELD 

FieldPosition selector for "U" field alignment, corresponding to cyclic year names.

This is implemented using the UCAL_YEAR field. This displays the cyclic year name, if available.

Stable:
ICU 49
UDAT_TIMEZONE_LOCALIZED_GMT_OFFSET_FIELD 

FieldPosition selector for 'O' field alignment, corresponding to the UCAL_ZONE_OFFSET and UCAL_DST_OFFSETfields.

This displays the localized GMT format.

Stable:
ICU 51
UDAT_TIMEZONE_ISO_FIELD 

FieldPosition selector for 'X' field alignment, corresponding to the UCAL_ZONE_OFFSET and UCAL_DST_OFFSETfields.

This displays the ISO 8601 local time offset format or UTC indicator ("Z").

Stable:
ICU 51
UDAT_TIMEZONE_ISO_LOCAL_FIELD 

FieldPosition selector for 'x' field alignment, corresponding to the UCAL_ZONE_OFFSET and UCAL_DST_OFFSET fields.

This displays the ISO 8601 local time offset format.

Stable:
ICU 51
UDAT_RELATED_YEAR_FIELD 

FieldPosition and UFieldPosition selector for 'r' field alignment, no directly corresponding UCAL_ field.

Internal:
Do not use. This API is for internal use only. ICU 53
UDAT_FIELD_COUNT 

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

Definition at line 487 of file udat.h.

The possible date/time format styles.

Stable:
ICU 2.6
Enumerator
UDAT_FULL 

Full style.

UDAT_LONG 

Long style.

UDAT_MEDIUM 

Medium style.

UDAT_SHORT 

Short style.

UDAT_DEFAULT 

Default style.

UDAT_RELATIVE 

Bitfield for relative date.

UDAT_NONE 

No style.

UDAT_PATTERN 

Use the pattern given in the parameter to udat_open.

See Also
udat_open
Stable:
ICU 50
UDAT_IGNORE 
Internal:
Do not use. This API is for internal use only. alias to UDAT_PATTERN

Definition at line 155 of file udat.h.

The possible types of date format symbols.

Stable:
ICU 2.6
Enumerator
UDAT_ERAS 

The era names, for example AD.

UDAT_MONTHS 

The month names, for example February.

UDAT_SHORT_MONTHS 

The short month names, for example Feb.

UDAT_WEEKDAYS 

The CLDR-style format "wide" weekday names, for example Monday.

UDAT_SHORT_WEEKDAYS 

The CLDR-style format "abbreviated" (not "short") weekday names, for example "Mon." For the CLDR-style format "short" weekday names, use UDAT_SHORTER_WEEKDAYS.

UDAT_AM_PMS 

The AM/PM names, for example AM.

UDAT_LOCALIZED_CHARS 

The localized characters.

UDAT_ERA_NAMES 

The long era names, for example Anno Domini.

UDAT_NARROW_MONTHS 

The narrow month names, for example F.

UDAT_NARROW_WEEKDAYS 

The CLDR-style format "narrow" weekday names, for example "M".

UDAT_STANDALONE_MONTHS 

Standalone context versions of months.

UDAT_STANDALONE_WEEKDAYS 

The CLDR-style stand-alone "wide" weekday names.

UDAT_STANDALONE_SHORT_WEEKDAYS 

The CLDR-style stand-alone "abbreviated" (not "short") weekday names.

For the CLDR-style stand-alone "short" weekday names, use UDAT_STANDALONE_SHORTER_WEEKDAYS.

UDAT_STANDALONE_NARROW_WEEKDAYS 

The CLDR-style stand-alone "narrow" weekday names.

UDAT_QUARTERS 

The quarters, for example 1st Quarter.

UDAT_SHORT_QUARTERS 

The short quarter names, for example Q1.

UDAT_STANDALONE_QUARTERS 

Standalone context versions of quarters.

UDAT_SHORTER_WEEKDAYS 

The CLDR-style short weekday names, e.g.

"Su", Mo", etc. These are named "SHORTER" to contrast with the constants using SHORT above, which actually get the CLDR-style abbreviated versions of the corresponding names.

Stable:
ICU 51
UDAT_STANDALONE_SHORTER_WEEKDAYS 

Standalone version of UDAT_SHORTER_WEEKDAYS.

Stable:
ICU 51

Definition at line 1191 of file udat.h.

Function Documentation

void udat_applyPattern ( UDateFormat format,
UBool  localized,
const UChar pattern,
int32_t  patternLength 
)

Set the pattern used by an UDateFormat.

The pattern should follow the pattern syntax rules.

Parameters
formatThe formatter to set.
localizedTRUE if the pattern is localized, FALSE otherwise.
patternThe new pattern
patternLengthThe length of pattern, or -1 if null-terminated.
See Also
udat_toPattern
Stable:
ICU 2.0
void udat_applyPatternRelative ( UDateFormat format,
const UChar datePattern,
int32_t  datePatternLength,
const UChar timePattern,
int32_t  timePatternLength,
UErrorCode status 
)

Set the date & time patterns used by a UDateFormat set for relative date formatting.

The patterns should follow the pattern syntax rules.

Parameters
formatThe formatter to set.
datePatternThe new date pattern
datePatternLengthThe length of datePattern, or -1 if null-terminated.
timePatternThe new time pattern
timePatternLengthThe length of timePattern, or -1 if null-terminated.
statusA pointer to a UErrorCode to receive any errors
See Also
udat_toPatternRelativeDate, udat_toPatternRelativeTime
Internal:
Do not use. This API is for internal use only. ICU 4.2 technology preview
UDateFormat* udat_clone ( const UDateFormat fmt,
UErrorCode status 
)

Open a copy of a UDateFormat.

This function performs a deep copy.

Parameters
fmtThe format to copy
statusA pointer to an UErrorCode to receive any errors.
Returns
A pointer to a UDateFormat identical to fmt.
Stable:
ICU 2.0
void udat_close ( UDateFormat format)

Close a UDateFormat.

Once closed, a UDateFormat may no longer be used.

Parameters
formatThe formatter to close.
Stable:
ICU 2.0
int32_t udat_countAvailable ( void  )

Determine how many locales have date/time formatting patterns available.

This function is most useful as determining the loop ending condition for calls to udat_getAvailable.

Returns
The number of locales for which date/time formatting patterns are available.
See Also
udat_getAvailable
Stable:
ICU 2.0
int32_t udat_countSymbols ( const UDateFormat fmt,
UDateFormatSymbolType  type 
)

Count the number of particular symbols for an UDateFormat.

This function is most useful as for detemining the loop termination condition for calls to udat_getSymbols.

Parameters
fmtThe formatter to query.
typeThe 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
Returns
The number of symbols of type type.
See Also
udat_getSymbols
udat_setSymbols
Stable:
ICU 2.0
int32_t 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 udat_open

Parameters
formatThe formatter to use
dateToFormatThe date to format
resultA pointer to a buffer to receive the formatted number.
resultLengthThe maximum size of result.
positionA 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.
statusA pointer to an UErrorCode to receive any errors
Returns
The total buffer size needed; if greater than resultLength, the output was truncated.
See Also
udat_parse
UFieldPosition
Stable:
ICU 2.0
UDate udat_get2DigitYearStart ( const UDateFormat fmt,
UErrorCode status 
)

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.

Parameters
fmtThe formatter to query.
statusA pointer to an UErrorCode to receive any errors
Returns
The year relative to which all 2-digit years are interpreted.
See Also
udat_Set2DigitYearStart
Stable:
ICU 2.0
const char* udat_getAvailable ( int32_t  localeIndex)

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.

Parameters
localeIndexThe index of the desired locale.
Returns
A locale for which date/time formatting patterns are available, or 0 if none.
See Also
udat_countAvailable
Stable:
ICU 2.0
UBool udat_getBooleanAttribute ( const UDateFormat fmt,
UDateFormatBooleanAttribute  attr,
UErrorCode status 
)

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.

Parameters
fmtThe formatter to query.
attrThe attribute to query; e.g. UDAT_PARSE_ALLOW_WHITESPACE.
statusA pointer to an UErrorCode to receive any errors
Returns
The value of attr.
Draft:
This API may be changed in the future versions and was introduced in ICU 53
const UCalendar* udat_getCalendar ( const UDateFormat fmt)

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.

Parameters
fmtThe formatter to query.
Returns
A pointer to the UCalendar used by fmt.
See Also
udat_setCalendar
Stable:
ICU 2.0
UDisplayContext udat_getContext ( const UDateFormat fmt,
UDisplayContextType  type,
UErrorCode status 
)

Get the formatter's UDisplayContext value for the specified UDisplayContextType, such as UDISPCTX_TYPE_CAPITALIZATION.

Parameters
fmtThe formatter to query.
typeThe UDisplayContextType whose value to return
statusA pointer to an UErrorCode to receive any errors
Returns
The UDisplayContextValue for the specified type.
Draft:
This API may be changed in the future versions and was introduced in ICU 53
const char* udat_getLocaleByType ( const UDateFormat fmt,
ULocDataLocaleType  type,
UErrorCode status 
)

Get the locale for this date format object.

You can choose between valid and actual locale.

Parameters
fmtThe formatter to get the locale from
typetype of the locale we're looking for (valid or actual)
statuserror code for the operation
Returns
the locale name
Stable:
ICU 2.8
const UNumberFormat* udat_getNumberFormat ( const UDateFormat fmt)

Get the UNumberFormat associated with an UDateFormat.

A UDateFormat uses a UNumberFormat to format numbers within a date, for example the day number.

Parameters
fmtThe formatter to query.
Returns
A pointer to the UNumberFormat used by fmt to format numbers.
See Also
udat_setNumberFormat
Stable:
ICU 2.0
int32_t udat_getSymbols ( const UDateFormat fmt,
UDateFormatSymbolType  type,
int32_t  symbolIndex,
UChar result,
int32_t  resultLength,
UErrorCode status 
)

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.

Parameters
fmtThe formatter to query.
typeThe 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
symbolIndexThe desired symbol of type type.
resultA pointer to a buffer to receive the pattern.
resultLengthThe maximum size of result.
statusA pointer to an UErrorCode to receive any errors
Returns
The total buffer size needed; if greater than resultLength, the output was truncated.
See Also
udat_countSymbols
udat_setSymbols
Stable:
ICU 2.0
UBool udat_isLenient ( const UDateFormat fmt)

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.

Parameters
fmtThe formatter to query
Returns
TRUE if fmt is set to perform lenient parsing, FALSE otherwise.
See Also
udat_setLenient
Stable:
ICU 2.0
UDateFormat* udat_open ( UDateFormatStyle  timeStyle,
UDateFormatStyle  dateStyle,
const char *  locale,
const UChar tzID,
int32_t  tzIDLength,
const UChar pattern,
int32_t  patternLength,
UErrorCode status 
)

Open a new UDateFormat for formatting and parsing dates and times.

A UDateFormat may be used to format dates in calls to udat_format, and to parse dates in calls to udat_parse.

Parameters
timeStyleThe 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.
dateStyleThe 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.
localeThe locale specifying the formatting conventions
tzIDA timezone ID specifying the timezone to use. If 0, use the default timezone.
tzIDLengthThe length of tzID, or -1 if null-terminated.
patternA pattern specifying the format to use.
patternLengthThe number of characters in the pattern, or -1 if null-terminated.
statusA pointer to an UErrorCode to receive any errors
Returns
A pointer to a UDateFormat to use for formatting dates and times, or 0 if an error occurred.
Stable:
ICU 2.0
UDate 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 udat_open.

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.

Parameters
formatThe formatter to use.
textThe text to parse.
textLengthThe length of text, or -1 if null-terminated.
parsePosIf 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.
statusA pointer to an UErrorCode to receive any errors
Returns
The value of the parsed date/time
See Also
udat_format
Stable:
ICU 2.0
void udat_parseCalendar ( const UDateFormat format,
UCalendar calendar,
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 udat_open.

Parameters
formatThe formatter to use.
calendarA 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.
textThe text to parse.
textLengthThe length of text, or -1 if null-terminated.
parsePosIf 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.
statusA pointer to an UErrorCode to receive any errors
See Also
udat_format
Stable:
ICU 2.0
void udat_registerOpener ( UDateFormatOpener  opener,
UErrorCode status 
)

Register a provider factory.

Internal:
Do not use. This API is for internal use only. ICU 49
void udat_set2DigitYearStart ( UDateFormat fmt,
UDate  d,
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.

Parameters
fmtThe formatter to set.
dThe year relative to which all 2-digit years will be interpreted.
statusA pointer to an UErrorCode to receive any errors
See Also
udat_Set2DigitYearStart
Stable:
ICU 2.0
void udat_setBooleanAttribute ( UDateFormat fmt,
UDateFormatBooleanAttribute  attr,
UBool  newValue,
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.

Parameters
fmtThe formatter to set.
attrThe attribute to set; one of UDAT_PARSE_ALLOW_WHITESPACE or UDAT_PARSE_ALLOW_NUMERIC
newValueThe new value of attr.
statusA pointer to an UErrorCode to receive any errors
Draft:
This API may be changed in the future versions and was introduced in ICU 53
void udat_setCalendar ( UDateFormat fmt,
const UCalendar calendarToSet 
)

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.

Parameters
fmtThe formatter to set.
calendarToSetA pointer to an UCalendar to be used by fmt.
See Also
udat_setCalendar
Stable:
ICU 2.0
void udat_setContext ( UDateFormat fmt,
UDisplayContext  value,
UErrorCode status 
)

Set a particular UDisplayContext value in the formatter, such as UDISPCTX_CAPITALIZATION_FOR_STANDALONE.

Parameters
fmtThe formatter for which to set a UDisplayContext value.
valueThe UDisplayContext value to set.
statusA pointer to an UErrorCode to receive any errors
Stable:
ICU 51
void udat_setLenient ( UDateFormat fmt,
UBool  isLenient 
)

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.

Parameters
fmtThe formatter to set
isLenientTRUE if fmt should perform lenient parsing, FALSE otherwise.
See Also
dat_isLenient
Stable:
ICU 2.0
void udat_setNumberFormat ( UDateFormat fmt,
const UNumberFormat numberFormatToSet 
)

Set the UNumberFormat associated with an UDateFormat.

A UDateFormat uses a UNumberFormat to format numbers within a date, for example the day number.

Parameters
fmtThe formatter to set.
numberFormatToSetA pointer to the UNumberFormat to be used by fmt to format numbers.
See Also
udat_getNumberFormat
Stable:
ICU 2.0
void udat_setSymbols ( UDateFormat format,
UDateFormatSymbolType  type,
int32_t  symbolIndex,
UChar value,
int32_t  valueLength,
UErrorCode status 
)

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.

Parameters
formatThe formatter to set
typeThe 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
symbolIndexThe index of the symbol to set of type type.
valueThe new value
valueLengthThe length of value, or -1 if null-terminated
statusA pointer to an UErrorCode to receive any errors
See Also
udat_getSymbols
udat_countSymbols
Stable:
ICU 2.0
UCalendarDateFields udat_toCalendarDateField ( UDateFormatField  field)

Maps from a UDateFormatField to the corresponding UCalendarDateFields.

Note: since the mapping is many-to-one, there is no inverse mapping.

Parameters
fieldthe UDateFormatField.
Returns
the UCalendarDateField. This will be UCAL_FIELD_COUNT in case of error (e.g., the input field is UDAT_FIELD_COUNT).
Stable:
ICU 4.4
int32_t udat_toPattern ( const UDateFormat fmt,
UBool  localized,
UChar result,
int32_t  resultLength,
UErrorCode status 
)

Extract the pattern from a UDateFormat.

The pattern will follow the pattern syntax rules.

Parameters
fmtThe formatter to query.
localizedTRUE if the pattern should be localized, FALSE otherwise.
resultA pointer to a buffer to receive the pattern.
resultLengthThe maximum size of result.
statusA pointer to an UErrorCode to receive any errors
Returns
The total buffer size needed; if greater than resultLength, the output was truncated.
See Also
udat_applyPattern
Stable:
ICU 2.0
int32_t udat_toPatternRelativeDate ( const UDateFormat fmt,
UChar result,
int32_t  resultLength,
UErrorCode status 
)

Extract the date pattern from a UDateFormat set for relative date formatting.

The pattern will follow the pattern syntax rules.

Parameters
fmtThe formatter to query.
resultA pointer to a buffer to receive the pattern.
resultLengthThe maximum size of result.
statusA pointer to a UErrorCode to receive any errors
Returns
The total buffer size needed; if greater than resultLength, the output was truncated.
See Also
udat_applyPatternRelative
Internal:
Do not use. This API is for internal use only. ICU 4.2 technology preview
int32_t udat_toPatternRelativeTime ( 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.

Parameters
fmtThe formatter to query.
resultA pointer to a buffer to receive the pattern.
resultLengthThe maximum size of result.
statusA pointer to a UErrorCode to receive any errors
Returns
The total buffer size needed; if greater than resultLength, the output was truncated.
See Also
udat_applyPatternRelative
Internal:
Do not use. This API is for internal use only. ICU 4.2 technology preview
UDateFormatOpener udat_unregisterOpener ( UDateFormatOpener  opener,
UErrorCode status 
)

Un-Register a provider factory.

Internal:
Do not use. This API is for internal use only. ICU 49