| /* |
| ******************************************************************************* |
| * Copyright (C) 1996-2001, International Business Machines Corporation and others. All Rights Reserved. |
| ******************************************************************************* |
| */ |
| |
| #ifndef UDAT_H |
| #define UDAT_H |
| |
| #include "unicode/utypes.h" |
| #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(UCAL_DEFAULT, UCAL_DEFAULT, NULL, "PST", &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(UCAL_DEFAULT, UCAL_DEFAULT, NULL, "GMT", &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(UCAL_DEFAULT, UCAL_DEFAULT, NULL, "PST", &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", "GMT", &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. |
| */ |
| typedef void* UDateFormat; |
| |
| /** The possible date/time format styles */ |
| enum UDateFormatStyle { |
| /** Full style */ |
| UDAT_FULL, |
| /** Long style */ |
| UDAT_LONG, |
| /** Medium style */ |
| UDAT_MEDIUM, |
| /** Short style */ |
| UDAT_SHORT, |
| /** Default style */ |
| UDAT_DEFAULT = UDAT_MEDIUM, |
| /** No style */ |
| UDAT_NONE = -1, |
| /** for internal API use only */ |
| UDAT_IGNORE = -2 |
| |
| }; |
| typedef enum UDateFormatStyle UDateFormatStyle; |
| |
| /** |
| * Open a new UDateFormat for formatting and parsing dates and times. |
| * A UDateFormat may be used to format dates in calls to \Ref{udat_format}, |
| * and to parse dates in calls to \Ref{udat_parse}. |
| * @param timeStyle The style used to format times; one of UDAT_FULL_STYLE, UDAT_LONG_STYLE, |
| * UDAT_MEDIUM_STYLE, UDAT_SHORT_STYLE, or UDAT_DEFAULT_STYLE |
| * @param dateStyle The style used to format dates; one of UDAT_FULL_STYLE, UDAT_LONG_STYLE, |
| * UDAT_MEDIUM_STYLE, UDAT_SHORT_STYLE, or UDAT_DEFAULT_STYLE |
| * @param locale The locale specifying the formatting conventions |
| * @param tzID A timezone ID specifying the timezone to use. If 0, use |
| * the default timezone. |
| * @param tzIDLength The length of tzID, or -1 if null-terminated. |
| * @param status A pointer to an UErrorCode to receive any errors |
| * @param pattern A pattern specifying the format to use. |
| * @param patternLength The number of characters in the pattern, or -1 if null-terminated. |
| * @param locale The locale specifying the formatting conventions |
| * @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 |
| */ |
| U_CAPI UDateFormat* U_EXPORT2 |
| udat_open(UDateFormatStyle timeStyle, |
| UDateFormatStyle dateStyle, |
| const char *locale, |
| const UChar *tzID, |
| int32_t tzIDLength, |
| const UChar *pattern, |
| int32_t patternLength, |
| UErrorCode *status); |
| |
| |
| /** |
| * Close a UDateFormat. |
| * Once closed, a UDateFormat may no longer be used. |
| * @param fmt The formatter to close. |
| * @stable |
| */ |
| U_CAPI 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 |
| */ |
| U_CAPI 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 \Ref{udat_open} |
| * or \Ref{udat_openPattern} |
| * @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 |
| */ |
| U_CAPI 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 \Ref{udat_open} |
| * or \Ref{udat_openPattern} |
| * @param fmt 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 |
| */ |
| U_CAPI UDate U_EXPORT2 |
| udat_parse( const UDateFormat* format, |
| const UChar* text, |
| int32_t textLength, |
| int32_t *parsePos, |
| UErrorCode *status); |
| |
| /** |
| * Parse a string into an date/time using a UDateFormat. |
| * The date will be parsed using the conventions specified in \Ref{udat_open} |
| * or \Ref{udat_openPattern} |
| * @param fmt 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 |
| */ |
| U_CAPI void U_EXPORT2 |
| udat_parseCalendar(const UDateFormat* format, |
| UCalendar* calendar, |
| const UChar* text, |
| int32_t textLength, |
| int32_t *parsePos, |
| UErrorCode *status); |
| |
| /** |
| * Determine if an UDateFormat will perform lenient parsing. |
| * With lenient parsing, the parser may use heuristics to interpret inputs that do not |
| * precisely match the pattern. With strict parsing, inputs must match the pattern. |
| * @param fmt The formatter to query |
| * @return TRUE if fmt is set to perform lenient parsing, FALSE otherwise. |
| * @see udat_setLenient |
| * @stable |
| */ |
| U_CAPI UBool U_EXPORT2 |
| udat_isLenient(const UDateFormat* fmt); |
| |
| /** |
| * Specify whether an UDateFormat will perform lenient parsing. |
| * With lenient parsing, the parser may use heuristics to interpret inputs that do not |
| * precisely match the pattern. With strict parsing, inputs must match the pattern. |
| * @param fmt The formatter to set |
| * @param isLenient TRUE if fmt should perform lenient parsing, FALSE otherwise. |
| * @see dat_isLenient |
| * @stable |
| */ |
| U_CAPI void U_EXPORT2 |
| udat_setLenient( UDateFormat* fmt, |
| UBool isLenient); |
| |
| /** |
| * Get the UCalendar associated with an UDateFormat. |
| * A UDateFormat uses a UCalendar to convert a raw value to, for example, |
| * the day of the week. |
| * @param fmt The formatter to query. |
| * @return A pointer to the UCalendar used by fmt. |
| * @see udat_setCalendar |
| * @stable |
| */ |
| U_CAPI const UCalendar* U_EXPORT2 |
| udat_getCalendar(const UDateFormat* fmt); |
| |
| /** |
| * Set the UCalendar associated with an UDateFormat. |
| * A UDateFormat uses a UCalendar to convert a raw value to, for example, |
| * the day of the week. |
| * @param fmt The formatter to set. |
| * @param calendarToSet A pointer to an UCalendar to be used by fmt. |
| * @see udat_setCalendar |
| * @stable |
| */ |
| U_CAPI void U_EXPORT2 |
| udat_setCalendar( UDateFormat* fmt, |
| const UCalendar* calendarToSet); |
| |
| /** |
| * Get the UNumberFormat associated with an UDateFormat. |
| * A UDateFormat uses a UNumberFormat to format numbers within a date, |
| * for example the day number. |
| * @param fmt The formatter to query. |
| * @return A pointer to the UNumberFormat used by fmt to format numbers. |
| * @see udat_setNumberFormat |
| * @stable |
| */ |
| U_CAPI 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 |
| */ |
| U_CAPI 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 index 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 |
| */ |
| U_CAPI const char* U_EXPORT2 |
| udat_getAvailable(int32_t index); |
| |
| /** |
| * Determine how many locales have date/time formatting patterns available. |
| * This function is most useful as determining the loop ending condition for |
| * calls to \Ref{udat_getAvailable}. |
| * @return The number of locales for which date/time formatting patterns are available. |
| * @see udat_getAvailable |
| * @stable |
| */ |
| U_CAPI int32_t U_EXPORT2 |
| udat_countAvailable(void); |
| |
| /** |
| * Get the year relative to which all 2-digit years are interpreted. |
| * For example, if the 2-digit start year is 2100, the year 99 will be |
| * interpreted as 2199. |
| * @param fmt The formatter to query. |
| * @param status A pointer to an UErrorCode to receive any errors |
| * @return The year relative to which all 2-digit years are interpreted. |
| * @see udat_Set2DigitYearStart |
| * @stable |
| */ |
| U_CAPI UDate U_EXPORT2 |
| udat_get2DigitYearStart( const UDateFormat *fmt, |
| UErrorCode *status); |
| |
| /** |
| * Set the year relative to which all 2-digit years will be interpreted. |
| * For example, if the 2-digit start year is 2100, the year 99 will be |
| * interpreted as 2199. |
| * @param fmt The formatter to set. |
| * @param d The year relative to which all 2-digit years will be interpreted. |
| * @param status A pointer to an UErrorCode to receive any errors |
| * @see udat_Set2DigitYearStart |
| * @stable |
| */ |
| U_CAPI void U_EXPORT2 |
| udat_set2DigitYearStart( UDateFormat *fmt, |
| UDate d, |
| UErrorCode *status); |
| |
| /** |
| * Extract the pattern from a UDateFormat. |
| * The pattern will follow the pattern syntax rules. |
| * @param fmt The formatter to query. |
| * @param localized TRUE if the pattern should be localized, FALSE otherwise. |
| * @param result A pointer to a buffer to receive the pattern. |
| * @param resultLength The maximum size of result. |
| * @param status A pointer to an UErrorCode to receive any errors |
| * @return The total buffer size needed; if greater than resultLength, the output was truncated. |
| * @see udat_applyPattern |
| * @stable |
| */ |
| U_CAPI int32_t U_EXPORT2 |
| udat_toPattern( const UDateFormat *fmt, |
| UBool localized, |
| UChar *result, |
| int32_t resultLength, |
| UErrorCode *status); |
| |
| /** |
| * Set the pattern used by an UDateFormat. |
| * The pattern should follow the pattern syntax rules. |
| * @param fmt 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 |
| * @draft |
| */ |
| U_CAPI void U_EXPORT2 |
| udat_applyPattern( UDateFormat *format, |
| UBool localized, |
| const UChar *pattern, |
| int32_t patternLength); |
| |
| /** The possible types of date format symbols */ |
| 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 |
| }; |
| typedef enum UDateFormatSymbolType UDateFormatSymbolType; |
| |
| /** Date format symbols. |
| * For usage in C programs. |
| */ |
| struct UDateFormatSymbols; |
| 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 index 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 |
| */ |
| U_CAPI int32_t U_EXPORT2 |
| udat_getSymbols(const UDateFormat *fmt, |
| UDateFormatSymbolType type, |
| int32_t index, |
| 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 \Ref{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 |
| */ |
| U_CAPI int32_t U_EXPORT2 |
| udat_countSymbols( const UDateFormat *fmt, |
| UDateFormatSymbolType type); |
| |
| /** |
| * Set the symbols associated with an UDateFormat. |
| * The symbols are what a UDateFormat uses to represent locale-specific data, |
| * for example month or day names. |
| * @param fmt 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 index 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 |
| */ |
| U_CAPI void U_EXPORT2 |
| udat_setSymbols( UDateFormat *format, |
| UDateFormatSymbolType type, |
| int32_t index, |
| UChar *value, |
| int32_t valueLength, |
| UErrorCode *status); |
| |
| /********************* Deprecated API ************************************/ |
| /** |
| *@deprecated Remove after Aug 2002 |
| */ |
| #ifdef U_USE_DEPRECATED_FORMAT_API |
| #if ((U_ICU_VERSION_MAJOR_NUM != 2) || (U_ICU_VERSION_MINOR_NUM !=1)) |
| # error "ICU version has changed. Please redefine the macros under U_USE_DEPRECATED_FORMAT_API pre-processor definition" |
| #else |
| static UDateFormat* |
| udat_openPattern(const UChar* pattern,int32_t patternLength,const char* locale,UErrorCode *status) |
| { |
| return udat_open(UDAT_IGNORE,UDAT_IGNORE,locale,NULL,0,pattern,patternLength,status); |
| } |
| |
| # define udat_open_2_1(timeStyle,dateStyle,locale,tzId,tzIdLength,status) udat_open(timeStyle,dateStyle,locale,tzId,tzIdLength,NULL,0,status) |
| #endif |
| #endif |
| /********************* End **********************************************/ |
| #endif |
