/usr/include/unicode/udatpg.h (27405B)
The main method people will use is udatpg_getBestPattern, since normally * UDateTimePatternGenerator is pre-built with data from a particular locale. * However, generators can be built directly from other data as well. *
Issue: may be useful to also have a function that returns the list of * fields in a pattern, in order, since we have that internally. * That would be useful for getting the UI order of field elements. */ /** * Opaque type for a date/time pattern generator object. * @stable ICU 3.8 */ typedef void *UDateTimePatternGenerator; /** * Field number constants for udatpg_getAppendItemFormats() and similar functions. * These constants are separate from UDateFormatField despite semantic overlap * because some fields are merged for the date/time pattern generator. * @stable ICU 3.8 */ typedef enum UDateTimePatternField { /** @stable ICU 3.8 */ UDATPG_ERA_FIELD, /** @stable ICU 3.8 */ UDATPG_YEAR_FIELD, /** @stable ICU 3.8 */ UDATPG_QUARTER_FIELD, /** @stable ICU 3.8 */ UDATPG_MONTH_FIELD, /** @stable ICU 3.8 */ UDATPG_WEEK_OF_YEAR_FIELD, /** @stable ICU 3.8 */ UDATPG_WEEK_OF_MONTH_FIELD, /** @stable ICU 3.8 */ UDATPG_WEEKDAY_FIELD, /** @stable ICU 3.8 */ UDATPG_DAY_OF_YEAR_FIELD, /** @stable ICU 3.8 */ UDATPG_DAY_OF_WEEK_IN_MONTH_FIELD, /** @stable ICU 3.8 */ UDATPG_DAY_FIELD, /** @stable ICU 3.8 */ UDATPG_DAYPERIOD_FIELD, /** @stable ICU 3.8 */ UDATPG_HOUR_FIELD, /** @stable ICU 3.8 */ UDATPG_MINUTE_FIELD, /** @stable ICU 3.8 */ UDATPG_SECOND_FIELD, /** @stable ICU 3.8 */ UDATPG_FRACTIONAL_SECOND_FIELD, /** @stable ICU 3.8 */ UDATPG_ZONE_FIELD, /* Do not conditionalize the following with #ifndef U_HIDE_DEPRECATED_API, * it is needed for layout of DateTimePatternGenerator object. */ #ifndef U_FORCE_HIDE_DEPRECATED_API /** * One more than the highest normal UDateTimePatternField value. * @deprecated ICU 58 The numeric value may change over time, see ICU ticket #12420. */ UDATPG_FIELD_COUNT #endif // U_FORCE_HIDE_DEPRECATED_API } UDateTimePatternField; /** * Field display name width constants for udatpg_getFieldDisplayName(). * @stable ICU 61 */ typedef enum UDateTimePGDisplayWidth { /** @stable ICU 61 */ UDATPG_WIDE, /** @stable ICU 61 */ UDATPG_ABBREVIATED, /** @stable ICU 61 */ UDATPG_NARROW } UDateTimePGDisplayWidth; /** * Masks to control forcing the length of specified fields in the returned * pattern to match those in the skeleton (when this would not happen * otherwise). These may be combined to force the length of multiple fields. * Used with udatpg_getBestPatternWithOptions, udatpg_replaceFieldTypesWithOptions. * @stable ICU 4.4 */ typedef enum UDateTimePatternMatchOptions { /** @stable ICU 4.4 */ UDATPG_MATCH_NO_OPTIONS = 0, /** @stable ICU 4.4 */ UDATPG_MATCH_HOUR_FIELD_LENGTH = 1 << UDATPG_HOUR_FIELD, #ifndef U_HIDE_INTERNAL_API /** @internal ICU 4.4 */ UDATPG_MATCH_MINUTE_FIELD_LENGTH = 1 << UDATPG_MINUTE_FIELD, /** @internal ICU 4.4 */ UDATPG_MATCH_SECOND_FIELD_LENGTH = 1 << UDATPG_SECOND_FIELD, #endif /* U_HIDE_INTERNAL_API */ /** @stable ICU 4.4 */ UDATPG_MATCH_ALL_FIELDS_LENGTH = (1 << UDATPG_FIELD_COUNT) - 1 } UDateTimePatternMatchOptions; /** * Status return values from udatpg_addPattern(). * @stable ICU 3.8 */ typedef enum UDateTimePatternConflict { /** @stable ICU 3.8 */ UDATPG_NO_CONFLICT, /** @stable ICU 3.8 */ UDATPG_BASE_CONFLICT, /** @stable ICU 3.8 */ UDATPG_CONFLICT, #ifndef U_HIDE_DEPRECATED_API /** * One more than the highest normal UDateTimePatternConflict value. * @deprecated ICU 58 The numeric value may change over time, see ICU ticket #12420. */ UDATPG_CONFLICT_COUNT #endif // U_HIDE_DEPRECATED_API } UDateTimePatternConflict; /** * Open a generator according to a given locale. * @param locale * @param pErrorCode a pointer to the UErrorCode which must not indicate a * failure before the function call. * @return a pointer to UDateTimePatternGenerator. * @stable ICU 3.8 */ U_CAPI UDateTimePatternGenerator * U_EXPORT2 udatpg_open(const char *locale, UErrorCode *pErrorCode); /** * Open an empty generator, to be constructed with udatpg_addPattern(...) etc. * @param pErrorCode a pointer to the UErrorCode which must not indicate a * failure before the function call. * @return a pointer to UDateTimePatternGenerator. * @stable ICU 3.8 */ U_CAPI UDateTimePatternGenerator * U_EXPORT2 udatpg_openEmpty(UErrorCode *pErrorCode); /** * Close a generator. * @param dtpg a pointer to UDateTimePatternGenerator. * @stable ICU 3.8 */ U_CAPI void U_EXPORT2 udatpg_close(UDateTimePatternGenerator *dtpg); #if U_SHOW_CPLUSPLUS_API U_NAMESPACE_BEGIN /** * \class LocalUDateTimePatternGeneratorPointer * "Smart pointer" class, closes a UDateTimePatternGenerator via udatpg_close(). * For most methods see the LocalPointerBase base class. * * @see LocalPointerBase * @see LocalPointer * @stable ICU 4.4 */ U_DEFINE_LOCAL_OPEN_POINTER(LocalUDateTimePatternGeneratorPointer, UDateTimePatternGenerator, udatpg_close); U_NAMESPACE_END #endif /** * Create a copy pf a generator. * @param dtpg a pointer to UDateTimePatternGenerator to be copied. * @param pErrorCode a pointer to the UErrorCode which must not indicate a * failure before the function call. * @return a pointer to a new UDateTimePatternGenerator. * @stable ICU 3.8 */ U_CAPI UDateTimePatternGenerator * U_EXPORT2 udatpg_clone(const UDateTimePatternGenerator *dtpg, UErrorCode *pErrorCode); /** * Get the best pattern matching the input skeleton. It is guaranteed to * have all of the fields in the skeleton. * * Note that this function uses a non-const UDateTimePatternGenerator: * It uses a stateful pattern parser which is set up for each generator object, * rather than creating one for each function call. * Consecutive calls to this function do not affect each other, * but this function cannot be used concurrently on a single generator object. * * @param dtpg a pointer to UDateTimePatternGenerator. * @param skeleton * The skeleton is a pattern containing only the variable fields. * For example, "MMMdd" and "mmhh" are skeletons. * @param length the length of skeleton * @param bestPattern * The best pattern found from the given skeleton. * @param capacity the capacity of bestPattern. * @param pErrorCode a pointer to the UErrorCode which must not indicate a * failure before the function call. * @return the length of bestPattern. * @stable ICU 3.8 */ U_CAPI int32_t U_EXPORT2 udatpg_getBestPattern(UDateTimePatternGenerator *dtpg, const UChar *skeleton, int32_t length, UChar *bestPattern, int32_t capacity, UErrorCode *pErrorCode); /** * Get the best pattern matching the input skeleton. It is guaranteed to * have all of the fields in the skeleton. * * Note that this function uses a non-const UDateTimePatternGenerator: * It uses a stateful pattern parser which is set up for each generator object, * rather than creating one for each function call. * Consecutive calls to this function do not affect each other, * but this function cannot be used concurrently on a single generator object. * * @param dtpg a pointer to UDateTimePatternGenerator. * @param skeleton * The skeleton is a pattern containing only the variable fields. * For example, "MMMdd" and "mmhh" are skeletons. * @param length the length of skeleton * @param options * Options for forcing the length of specified fields in the * returned pattern to match those in the skeleton (when this * would not happen otherwise). For default behavior, use * UDATPG_MATCH_NO_OPTIONS. * @param bestPattern * The best pattern found from the given skeleton. * @param capacity * the capacity of bestPattern. * @param pErrorCode * a pointer to the UErrorCode which must not indicate a * failure before the function call. * @return the length of bestPattern. * @stable ICU 4.4 */ U_CAPI int32_t U_EXPORT2 udatpg_getBestPatternWithOptions(UDateTimePatternGenerator *dtpg, const UChar *skeleton, int32_t length, UDateTimePatternMatchOptions options, UChar *bestPattern, int32_t capacity, UErrorCode *pErrorCode); /** * Get a unique skeleton from a given pattern. For example, * both "MMM-dd" and "dd/MMM" produce the skeleton "MMMdd". * * Note that this function uses a non-const UDateTimePatternGenerator: * It uses a stateful pattern parser which is set up for each generator object, * rather than creating one for each function call. * Consecutive calls to this function do not affect each other, * but this function cannot be used concurrently on a single generator object. * * @param unusedDtpg a pointer to UDateTimePatternGenerator. * This parameter is no longer used. Callers may pass NULL. * @param pattern input pattern, such as "dd/MMM". * @param length the length of pattern. * @param skeleton such as "MMMdd" * @param capacity the capacity of skeleton. * @param pErrorCode a pointer to the UErrorCode which must not indicate a * failure before the function call. * @return the length of skeleton. * @stable ICU 3.8 */ U_CAPI int32_t U_EXPORT2 udatpg_getSkeleton(UDateTimePatternGenerator *unusedDtpg, const UChar *pattern, int32_t length, UChar *skeleton, int32_t capacity, UErrorCode *pErrorCode); /** * Get a unique base skeleton from a given pattern. This is the same * as the skeleton, except that differences in length are minimized so * as to only preserve the difference between string and numeric form. So * for example, both "MMM-dd" and "d/MMM" produce the skeleton "MMMd" * (notice the single d). * * Note that this function uses a non-const UDateTimePatternGenerator: * It uses a stateful pattern parser which is set up for each generator object, * rather than creating one for each function call. * Consecutive calls to this function do not affect each other, * but this function cannot be used concurrently on a single generator object. * * @param unusedDtpg a pointer to UDateTimePatternGenerator. * This parameter is no longer used. Callers may pass NULL. * @param pattern input pattern, such as "dd/MMM". * @param length the length of pattern. * @param baseSkeleton such as "Md" * @param capacity the capacity of base skeleton. * @param pErrorCode a pointer to the UErrorCode which must not indicate a * failure before the function call. * @return the length of baseSkeleton. * @stable ICU 3.8 */ U_CAPI int32_t U_EXPORT2 udatpg_getBaseSkeleton(UDateTimePatternGenerator *unusedDtpg, const UChar *pattern, int32_t length, UChar *baseSkeleton, int32_t capacity, UErrorCode *pErrorCode); /** * Adds a pattern to the generator. If the pattern has the same skeleton as * an existing pattern, and the override parameter is set, then the previous * value is overridden. Otherwise, the previous value is retained. In either * case, the conflicting status is set and previous vale is stored in * conflicting pattern. *
* Note that single-field patterns (like "MMM") are automatically added, and * don't need to be added explicitly! * * @param dtpg a pointer to UDateTimePatternGenerator. * @param pattern input pattern, such as "dd/MMM" * @param patternLength the length of pattern. * @param override When existing values are to be overridden use true, * otherwise use false. * @param conflictingPattern Previous pattern with the same skeleton. * @param capacity the capacity of conflictingPattern. * @param pLength a pointer to the length of conflictingPattern. * @param pErrorCode a pointer to the UErrorCode which must not indicate a * failure before the function call. * @return conflicting status. The value could be UDATPG_NO_CONFLICT, * UDATPG_BASE_CONFLICT or UDATPG_CONFLICT. * @stable ICU 3.8 */ U_CAPI UDateTimePatternConflict U_EXPORT2 udatpg_addPattern(UDateTimePatternGenerator *dtpg, const UChar *pattern, int32_t patternLength, UBool override, UChar *conflictingPattern, int32_t capacity, int32_t *pLength, UErrorCode *pErrorCode); /** * An AppendItem format is a pattern used to append a field if there is no * good match. For example, suppose that the input skeleton is "GyyyyMMMd", * and there is no matching pattern internally, but there is a pattern * matching "yyyyMMMd", say "d-MM-yyyy". Then that pattern is used, plus the * G. The way these two are conjoined is by using the AppendItemFormat for G * (era). So if that value is, say "{0}, {1}" then the final resulting * pattern is "d-MM-yyyy, G". *
* There are actually three available variables: {0} is the pattern so far, * {1} is the element we are adding, and {2} is the name of the element. *
* This reflects the way that the CLDR data is organized. * * @param dtpg a pointer to UDateTimePatternGenerator. * @param field UDateTimePatternField, such as UDATPG_ERA_FIELD * @param value pattern, such as "{0}, {1}" * @param length the length of value. * @stable ICU 3.8 */ U_CAPI void U_EXPORT2 udatpg_setAppendItemFormat(UDateTimePatternGenerator *dtpg, UDateTimePatternField field, const UChar *value, int32_t length); /** * Getter corresponding to setAppendItemFormat. Values below 0 or at or * above UDATPG_FIELD_COUNT are illegal arguments. * * @param dtpg A pointer to UDateTimePatternGenerator. * @param field UDateTimePatternField, such as UDATPG_ERA_FIELD * @param pLength A pointer that will receive the length of appendItemFormat. * @return appendItemFormat for field. * @stable ICU 3.8 */ U_CAPI const UChar * U_EXPORT2 udatpg_getAppendItemFormat(const UDateTimePatternGenerator *dtpg, UDateTimePatternField field, int32_t *pLength); /** * Set the name of field, eg "era" in English for ERA. These are only * used if the corresponding AppendItemFormat is used, and if it contains a * {2} variable. *
* This reflects the way that the CLDR data is organized. * * @param dtpg a pointer to UDateTimePatternGenerator. * @param field UDateTimePatternField * @param value name for the field. * @param length the length of value. * @stable ICU 3.8 */ U_CAPI void U_EXPORT2 udatpg_setAppendItemName(UDateTimePatternGenerator *dtpg, UDateTimePatternField field, const UChar *value, int32_t length); /** * Getter corresponding to setAppendItemNames. Values below 0 or at or above * UDATPG_FIELD_COUNT are illegal arguments. Note: The more general function * for getting date/time field display names is udatpg_getFieldDisplayName. * * @param dtpg a pointer to UDateTimePatternGenerator. * @param field UDateTimePatternField, such as UDATPG_ERA_FIELD * @param pLength A pointer that will receive the length of the name for field. * @return name for field * @see udatpg_getFieldDisplayName * @stable ICU 3.8 */ U_CAPI const UChar * U_EXPORT2 udatpg_getAppendItemName(const UDateTimePatternGenerator *dtpg, UDateTimePatternField field, int32_t *pLength); /** * The general interface to get a display name for a particular date/time field, * in one of several possible display widths. * * @param dtpg * A pointer to the UDateTimePatternGenerator object with the localized * display names. * @param field * The desired UDateTimePatternField, such as UDATPG_ERA_FIELD. * @param width * The desired UDateTimePGDisplayWidth, such as UDATPG_ABBREVIATED. * @param fieldName * A pointer to a buffer to receive the NULL-terminated display name. If the name * fits into fieldName but cannot be NULL-terminated (length == capacity) then * the error code is set to U_STRING_NOT_TERMINATED_WARNING. If the name doesn't * fit into fieldName then the error code is set to U_BUFFER_OVERFLOW_ERROR. * @param capacity * The size of fieldName (in UChars). * @param pErrorCode * A pointer to a UErrorCode to receive any errors * @return * The full length of the name; if greater than capacity, fieldName contains a * truncated result. * @stable ICU 61 */ U_CAPI int32_t U_EXPORT2 udatpg_getFieldDisplayName(const UDateTimePatternGenerator *dtpg, UDateTimePatternField field, UDateTimePGDisplayWidth width, UChar *fieldName, int32_t capacity, UErrorCode *pErrorCode); /** * The DateTimeFormat is a message format pattern used to compose date and * time patterns. The default pattern in the root locale is "{1} {0}", where * {1} will be replaced by the date pattern and {0} will be replaced by the * time pattern; however, other locales may specify patterns such as * "{1}, {0}" or "{1} 'at' {0}", etc. *
* This is used when the input skeleton contains both date and time fields, * but there is not a close match among the added patterns. For example, * suppose that this object was created by adding "dd-MMM" and "hh:mm", and * its DateTimeFormat is the default "{1} {0}". Then if the input skeleton * is "MMMdhmm", there is not an exact match, so the input skeleton is * broken up into two components "MMMd" and "hmm". There are close matches * for those two skeletons, so the result is put together with this pattern, * resulting in "d-MMM h:mm". * * @param dtpg a pointer to UDateTimePatternGenerator. * @param dtFormat * message format pattern, here {1} will be replaced by the date * pattern and {0} will be replaced by the time pattern. * @param length the length of dtFormat. * @stable ICU 3.8 */ U_CAPI void U_EXPORT2 udatpg_setDateTimeFormat(const UDateTimePatternGenerator *dtpg, const UChar *dtFormat, int32_t length); /** * Getter corresponding to setDateTimeFormat. * @param dtpg a pointer to UDateTimePatternGenerator. * @param pLength A pointer that will receive the length of the format * @return dateTimeFormat. * @stable ICU 3.8 */ U_CAPI const UChar * U_EXPORT2 udatpg_getDateTimeFormat(const UDateTimePatternGenerator *dtpg, int32_t *pLength); /** * The decimal value is used in formatting fractions of seconds. If the * skeleton contains fractional seconds, then this is used with the * fractional seconds. For example, suppose that the input pattern is * "hhmmssSSSS", and the best matching pattern internally is "H:mm:ss", and * the decimal string is ",". Then the resulting pattern is modified to be * "H:mm:ss,SSSS" * * @param dtpg a pointer to UDateTimePatternGenerator. * @param decimal * @param length the length of decimal. * @stable ICU 3.8 */ U_CAPI void U_EXPORT2 udatpg_setDecimal(UDateTimePatternGenerator *dtpg, const UChar *decimal, int32_t length); /** * Getter corresponding to setDecimal. * * @param dtpg a pointer to UDateTimePatternGenerator. * @param pLength A pointer that will receive the length of the decimal string. * @return corresponding to the decimal point. * @stable ICU 3.8 */ U_CAPI const UChar * U_EXPORT2 udatpg_getDecimal(const UDateTimePatternGenerator *dtpg, int32_t *pLength); /** * Adjusts the field types (width and subtype) of a pattern to match what is * in a skeleton. That is, if you supply a pattern like "d-M H:m", and a * skeleton of "MMMMddhhmm", then the input pattern is adjusted to be * "dd-MMMM hh:mm". This is used internally to get the best match for the * input skeleton, but can also be used externally. * * Note that this function uses a non-const UDateTimePatternGenerator: * It uses a stateful pattern parser which is set up for each generator object, * rather than creating one for each function call. * Consecutive calls to this function do not affect each other, * but this function cannot be used concurrently on a single generator object. * * @param dtpg a pointer to UDateTimePatternGenerator. * @param pattern Input pattern * @param patternLength the length of input pattern. * @param skeleton * @param skeletonLength the length of input skeleton. * @param dest pattern adjusted to match the skeleton fields widths and subtypes. * @param destCapacity the capacity of dest. * @param pErrorCode a pointer to the UErrorCode which must not indicate a * failure before the function call. * @return the length of dest. * @stable ICU 3.8 */ U_CAPI int32_t U_EXPORT2 udatpg_replaceFieldTypes(UDateTimePatternGenerator *dtpg, const UChar *pattern, int32_t patternLength, const UChar *skeleton, int32_t skeletonLength, UChar *dest, int32_t destCapacity, UErrorCode *pErrorCode); /** * Adjusts the field types (width and subtype) of a pattern to match what is * in a skeleton. That is, if you supply a pattern like "d-M H:m", and a * skeleton of "MMMMddhhmm", then the input pattern is adjusted to be * "dd-MMMM hh:mm". This is used internally to get the best match for the * input skeleton, but can also be used externally. * * Note that this function uses a non-const UDateTimePatternGenerator: * It uses a stateful pattern parser which is set up for each generator object, * rather than creating one for each function call. * Consecutive calls to this function do not affect each other, * but this function cannot be used concurrently on a single generator object. * * @param dtpg a pointer to UDateTimePatternGenerator. * @param pattern Input pattern * @param patternLength the length of input pattern. * @param skeleton * @param skeletonLength the length of input skeleton. * @param options * Options controlling whether the length of specified fields in the * pattern are adjusted to match those in the skeleton (when this * would not happen otherwise). For default behavior, use * UDATPG_MATCH_NO_OPTIONS. * @param dest pattern adjusted to match the skeleton fields widths and subtypes. * @param destCapacity the capacity of dest. * @param pErrorCode a pointer to the UErrorCode which must not indicate a * failure before the function call. * @return the length of dest. * @stable ICU 4.4 */ U_CAPI int32_t U_EXPORT2 udatpg_replaceFieldTypesWithOptions(UDateTimePatternGenerator *dtpg, const UChar *pattern, int32_t patternLength, const UChar *skeleton, int32_t skeletonLength, UDateTimePatternMatchOptions options, UChar *dest, int32_t destCapacity, UErrorCode *pErrorCode); /** * Return a UEnumeration list of all the skeletons in canonical form. * Call udatpg_getPatternForSkeleton() to get the corresponding pattern. * * @param dtpg a pointer to UDateTimePatternGenerator. * @param pErrorCode a pointer to the UErrorCode which must not indicate a * failure before the function call * @return a UEnumeration list of all the skeletons * The caller must close the object. * @stable ICU 3.8 */ U_CAPI UEnumeration * U_EXPORT2 udatpg_openSkeletons(const UDateTimePatternGenerator *dtpg, UErrorCode *pErrorCode); /** * Return a UEnumeration list of all the base skeletons in canonical form. * * @param dtpg a pointer to UDateTimePatternGenerator. * @param pErrorCode a pointer to the UErrorCode which must not indicate a * failure before the function call. * @return a UEnumeration list of all the base skeletons * The caller must close the object. * @stable ICU 3.8 */ U_CAPI UEnumeration * U_EXPORT2 udatpg_openBaseSkeletons(const UDateTimePatternGenerator *dtpg, UErrorCode *pErrorCode); /** * Get the pattern corresponding to a given skeleton. * * @param dtpg a pointer to UDateTimePatternGenerator. * @param skeleton * @param skeletonLength pointer to the length of skeleton. * @param pLength pointer to the length of return pattern. * @return pattern corresponding to a given skeleton. * @stable ICU 3.8 */ U_CAPI const UChar * U_EXPORT2 udatpg_getPatternForSkeleton(const UDateTimePatternGenerator *dtpg, const UChar *skeleton, int32_t skeletonLength, int32_t *pLength); #if !UCONFIG_NO_FORMATTING /** * Return the default hour cycle for a locale. Uses the locale that the * UDateTimePatternGenerator was initially created with. * * Cannot be used on an empty UDateTimePatternGenerator instance. * * @param dtpg a pointer to UDateTimePatternGenerator. * @param pErrorCode a pointer to the UErrorCode which must not indicate a * failure before the function call. Set to U_UNSUPPORTED_ERROR * if used on an empty instance. * @return the default hour cycle. * @stable ICU 67 */ U_CAPI UDateFormatHourCycle U_EXPORT2 udatpg_getDefaultHourCycle(const UDateTimePatternGenerator *dtpg, UErrorCode* pErrorCode); #endif /* #if !UCONFIG_NO_FORMATTING */ #endif