1/*
2* Copyright (C) 1997-2011, International Business Machines Corporation and
3* others. All Rights Reserved.
4*******************************************************************************
5*
6* File SMPDTFMT.H
7*
8* Modification History:
9*
10*   Date        Name        Description
11*   02/19/97    aliu        Converted from java.
12*   07/09/97    helena      Make ParsePosition into a class.
13*   07/21/98    stephen     Added GMT_PLUS, GMT_MINUS
14*                            Changed setTwoDigitStartDate to set2DigitYearStart
15*                            Changed getTwoDigitStartDate to get2DigitYearStart
16*                            Removed subParseLong
17*                            Removed getZoneIndex (added in DateFormatSymbols)
18*   06/14/99    stephen     Removed fgTimeZoneDataSuffix
19*   10/14/99    aliu        Updated class doc to describe 2-digit year parsing
20*                           {j28 4182066}.
21*******************************************************************************
22*/
23
24#ifndef SMPDTFMT_H
25#define SMPDTFMT_H
26
27#include "unicode/utypes.h"
28
29/**
30 * \file
31 * \brief C++ API: Format and parse dates in a language-independent manner.
32 */
33
34#if !UCONFIG_NO_FORMATTING
35
36#include "unicode/datefmt.h"
37
38U_NAMESPACE_BEGIN
39
40class DateFormatSymbols;
41class DateFormat;
42class MessageFormat;
43class FieldPositionHandler;
44class TimeZoneFormat;
45
46/**
47 *
48 * SimpleDateFormat is a concrete class for formatting and parsing dates in a
49 * language-independent manner. It allows for formatting (millis -> text),
50 * parsing (text -> millis), and normalization. Formats/Parses a date or time,
51 * which is the standard milliseconds since 24:00 GMT, Jan 1, 1970.
52 * <P>
53 * Clients are encouraged to create a date-time formatter using DateFormat::getInstance(),
54 * getDateInstance(), getDateInstance(), or getDateTimeInstance() rather than
55 * explicitly constructing an instance of SimpleDateFormat.  This way, the client
56 * is guaranteed to get an appropriate formatting pattern for whatever locale the
57 * program is running in.  However, if the client needs something more unusual than
58 * the default patterns in the locales, he can construct a SimpleDateFormat directly
59 * and give it an appropriate pattern (or use one of the factory methods on DateFormat
60 * and modify the pattern after the fact with toPattern() and applyPattern().
61 * <P>
62 * Date/Time format syntax:
63 * <P>
64 * The date/time format is specified by means of a string time pattern. In this
65 * pattern, all ASCII letters are reserved as pattern letters, which are defined
66 * as the following:
67 * <pre>
68 * \code
69 * Symbol   Meaning                 Presentation        Example
70 * ------   -------                 ------------        -------
71 * G        era designator          (Text)              AD
72 * y        year                    (Number)            1996
73 * Y        year (week of year)     (Number)            1997
74 * u        extended year           (Number)            4601
75 * Q        Quarter                 (Text & Number)     Q2 & 02
76 * M        month in year           (Text & Number)     July & 07
77 * d        day in month            (Number)            10
78 * h        hour in am/pm (1~12)    (Number)            12
79 * H        hour in day (0~23)      (Number)            0
80 * m        minute in hour          (Number)            30
81 * s        second in minute        (Number)            55
82 * S        fractional second       (Number)            978
83 * E        day of week             (Text)              Tuesday
84 * e        day of week (local 1~7) (Text & Number)     Tues & 2
85 * D        day in year             (Number)            189
86 * F        day of week in month    (Number)            2 (2nd Wed in July)
87 * w        week in year            (Number)            27
88 * W        week in month           (Number)            2
89 * a        am/pm marker            (Text)              PM
90 * k        hour in day (1~24)      (Number)            24
91 * K        hour in am/pm (0~11)    (Number)            0
92 * z        time zone               (Time)              Pacific Standard Time
93 * Z        time zone (RFC 822)     (Number)            -0800
94 * v        time zone (generic)     (Text)              Pacific Time
95 * V        time zone (abreviation) (Text)              PT
96 * VVVV     time zone (location)    (Text)              United States (Los Angeles)
97 * g        Julian day              (Number)            2451334
98 * A        milliseconds in day     (Number)            69540000
99 * q        stand alone quarter     (Text & Number)     Q2 & 02
100 * L        stand alone month       (Text & Number)     July & 07
101 * c        stand alone day of week (Text & Number)     Tuesday & 2
102 * '        escape for text         (Delimiter)         'Date='
103 * ''       single quote            (Literal)           'o''clock'
104 * \endcode
105 * </pre>
106 * The count of pattern letters determine the format.
107 * <P>
108 * (Text): 4 or more, use full form, &lt;4, use short or abbreviated form if it
109 * exists. (e.g., "EEEE" produces "Monday", "EEE" produces "Mon")
110 * <P>
111 * (Number): the minimum number of digits. Shorter numbers are zero-padded to
112 * this amount (e.g. if "m" produces "6", "mm" produces "06"). Year is handled
113 * specially; that is, if the count of 'y' is 2, the Year will be truncated to 2 digits.
114 * (e.g., if "yyyy" produces "1997", "yy" produces "97".)
115 * Unlike other fields, fractional seconds are padded on the right with zero.
116 * <P>
117 * (Text & Number): 3 or over, use text, otherwise use number.  (e.g., "M" produces "1",
118 * "MM" produces "01", "MMM" produces "Jan", and "MMMM" produces "January".)
119 * <P>
120 * Any characters in the pattern that are not in the ranges of ['a'..'z'] and
121 * ['A'..'Z'] will be treated as quoted text. For instance, characters
122 * like ':', '.', ' ', '#' and '@' will appear in the resulting time text
123 * even they are not embraced within single quotes.
124 * <P>
125 * A pattern containing any invalid pattern letter will result in a failing
126 * UErrorCode result during formatting or parsing.
127 * <P>
128 * Examples using the US locale:
129 * <pre>
130 * \code
131 *    Format Pattern                         Result
132 *    --------------                         -------
133 *    "yyyy.MM.dd G 'at' HH:mm:ss vvvv" ->>  1996.07.10 AD at 15:08:56 Pacific Time
134 *    "EEE, MMM d, ''yy"                ->>  Wed, July 10, '96
135 *    "h:mm a"                          ->>  12:08 PM
136 *    "hh 'o''clock' a, zzzz"           ->>  12 o'clock PM, Pacific Daylight Time
137 *    "K:mm a, vvv"                     ->>  0:00 PM, PT
138 *    "yyyyy.MMMMM.dd GGG hh:mm aaa"    ->>  1996.July.10 AD 12:08 PM
139 * \endcode
140 * </pre>
141 * Code Sample:
142 * <pre>
143 * \code
144 *     UErrorCode success = U_ZERO_ERROR;
145 *     SimpleTimeZone* pdt = new SimpleTimeZone(-8 * 60 * 60 * 1000, "PST");
146 *     pdt->setStartRule( Calendar::APRIL, 1, Calendar::SUNDAY, 2*60*60*1000);
147 *     pdt->setEndRule( Calendar::OCTOBER, -1, Calendar::SUNDAY, 2*60*60*1000);
148 *
149 *     // Format the current time.
150 *     SimpleDateFormat* formatter
151 *         = new SimpleDateFormat ("yyyy.MM.dd G 'at' hh:mm:ss a zzz", success );
152 *     GregorianCalendar cal(success);
153 *     UDate currentTime_1 = cal.getTime(success);
154 *     FieldPosition fp(0);
155 *     UnicodeString dateString;
156 *     formatter->format( currentTime_1, dateString, fp );
157 *     cout << "result: " << dateString << endl;
158 *
159 *     // Parse the previous string back into a Date.
160 *     ParsePosition pp(0);
161 *     UDate currentTime_2 = formatter->parse(dateString, pp );
162 * \endcode
163 * </pre>
164 * In the above example, the time value "currentTime_2" obtained from parsing
165 * will be equal to currentTime_1. However, they may not be equal if the am/pm
166 * marker 'a' is left out from the format pattern while the "hour in am/pm"
167 * pattern symbol is used. This information loss can happen when formatting the
168 * time in PM.
169 *
170 * <p>
171 * When parsing a date string using the abbreviated year pattern ("y" or "yy"),
172 * SimpleDateFormat must interpret the abbreviated year
173 * relative to some century.  It does this by adjusting dates to be
174 * within 80 years before and 20 years after the time the SimpleDateFormat
175 * instance is created. For example, using a pattern of "MM/dd/yy" and a
176 * SimpleDateFormat instance created on Jan 1, 1997,  the string
177 * "01/11/12" would be interpreted as Jan 11, 2012 while the string "05/04/64"
178 * would be interpreted as May 4, 1964.
179 * During parsing, only strings consisting of exactly two digits, as defined by
180 * <code>Unicode::isDigit()</code>, will be parsed into the default century.
181 * Any other numeric string, such as a one digit string, a three or more digit
182 * string, or a two digit string that isn't all digits (for example, "-1"), is
183 * interpreted literally.  So "01/02/3" or "01/02/003" are parsed, using the
184 * same pattern, as Jan 2, 3 AD.  Likewise, "01/02/-3" is parsed as Jan 2, 4 BC.
185 *
186 * <p>
187 * If the year pattern has more than two 'y' characters, the year is
188 * interpreted literally, regardless of the number of digits.  So using the
189 * pattern "MM/dd/yyyy", "01/11/12" parses to Jan 11, 12 A.D.
190 *
191 * <p>
192 * When numeric fields abut one another directly, with no intervening delimiter
193 * characters, they constitute a run of abutting numeric fields.  Such runs are
194 * parsed specially.  For example, the format "HHmmss" parses the input text
195 * "123456" to 12:34:56, parses the input text "12345" to 1:23:45, and fails to
196 * parse "1234".  In other words, the leftmost field of the run is flexible,
197 * while the others keep a fixed width.  If the parse fails anywhere in the run,
198 * then the leftmost field is shortened by one character, and the entire run is
199 * parsed again. This is repeated until either the parse succeeds or the
200 * leftmost field is one character in length.  If the parse still fails at that
201 * point, the parse of the run fails.
202 *
203 * <P>
204 * For time zones that have no names, SimpleDateFormat uses strings GMT+hours:minutes or
205 * GMT-hours:minutes.
206 * <P>
207 * The calendar defines what is the first day of the week, the first week of the
208 * year, whether hours are zero based or not (0 vs 12 or 24), and the timezone.
209 * There is one common number format to handle all the numbers; the digit count
210 * is handled programmatically according to the pattern.
211 *
212 * <p><em>User subclasses are not supported.</em> While clients may write
213 * subclasses, such code will not necessarily work and will not be
214 * guaranteed to work stably from release to release.
215 */
216class U_I18N_API SimpleDateFormat: public DateFormat {
217public:
218    /**
219     * Construct a SimpleDateFormat using the default pattern for the default
220     * locale.
221     * <P>
222     * [Note:] Not all locales support SimpleDateFormat; for full generality,
223     * use the factory methods in the DateFormat class.
224     * @param status    Output param set to success/failure code.
225     * @stable ICU 2.0
226     */
227    SimpleDateFormat(UErrorCode& status);
228
229    /**
230     * Construct a SimpleDateFormat using the given pattern and the default locale.
231     * The locale is used to obtain the symbols used in formatting (e.g., the
232     * names of the months), but not to provide the pattern.
233     * <P>
234     * [Note:] Not all locales support SimpleDateFormat; for full generality,
235     * use the factory methods in the DateFormat class.
236     * @param pattern    the pattern for the format.
237     * @param status     Output param set to success/failure code.
238     * @stable ICU 2.0
239     */
240    SimpleDateFormat(const UnicodeString& pattern,
241                     UErrorCode& status);
242
243    /**
244     * Construct a SimpleDateFormat using the given pattern, numbering system override, and the default locale.
245     * The locale is used to obtain the symbols used in formatting (e.g., the
246     * names of the months), but not to provide the pattern.
247     * <P>
248     * A numbering system override is a string containing either the name of a known numbering system,
249     * or a set of field and numbering system pairs that specify which fields are to be formattied with
250     * the alternate numbering system.  For example, to specify that all numeric fields in the specified
251     * date or time pattern are to be rendered using Thai digits, simply specify the numbering system override
252     * as "thai".  To specify that just the year portion of the date be formatted using Hebrew numbering,
253     * use the override string "y=hebrew".  Numbering system overrides can be combined using a semi-colon
254     * character in the override string, such as "d=decimal;M=arabic;y=hebrew", etc.
255     *
256     * <P>
257     * [Note:] Not all locales support SimpleDateFormat; for full generality,
258     * use the factory methods in the DateFormat class.
259     * @param pattern    the pattern for the format.
260     * @param override   the override string.
261     * @param status     Output param set to success/failure code.
262     * @stable ICU 4.2
263     */
264    SimpleDateFormat(const UnicodeString& pattern,
265                     const UnicodeString& override,
266                     UErrorCode& status);
267
268    /**
269     * Construct a SimpleDateFormat using the given pattern and locale.
270     * The locale is used to obtain the symbols used in formatting (e.g., the
271     * names of the months), but not to provide the pattern.
272     * <P>
273     * [Note:] Not all locales support SimpleDateFormat; for full generality,
274     * use the factory methods in the DateFormat class.
275     * @param pattern    the pattern for the format.
276     * @param locale     the given locale.
277     * @param status     Output param set to success/failure code.
278     * @stable ICU 2.0
279     */
280    SimpleDateFormat(const UnicodeString& pattern,
281                     const Locale& locale,
282                     UErrorCode& status);
283
284    /**
285     * Construct a SimpleDateFormat using the given pattern, numbering system override, and locale.
286     * The locale is used to obtain the symbols used in formatting (e.g., the
287     * names of the months), but not to provide the pattern.
288     * <P>
289     * A numbering system override is a string containing either the name of a known numbering system,
290     * or a set of field and numbering system pairs that specify which fields are to be formattied with
291     * the alternate numbering system.  For example, to specify that all numeric fields in the specified
292     * date or time pattern are to be rendered using Thai digits, simply specify the numbering system override
293     * as "thai".  To specify that just the year portion of the date be formatted using Hebrew numbering,
294     * use the override string "y=hebrew".  Numbering system overrides can be combined using a semi-colon
295     * character in the override string, such as "d=decimal;M=arabic;y=hebrew", etc.
296     * <P>
297     * [Note:] Not all locales support SimpleDateFormat; for full generality,
298     * use the factory methods in the DateFormat class.
299     * @param pattern    the pattern for the format.
300     * @param override   the numbering system override.
301     * @param locale     the given locale.
302     * @param status     Output param set to success/failure code.
303     * @stable ICU 4.2
304     */
305    SimpleDateFormat(const UnicodeString& pattern,
306                     const UnicodeString& override,
307                     const Locale& locale,
308                     UErrorCode& status);
309
310    /**
311     * Construct a SimpleDateFormat using the given pattern and locale-specific
312     * symbol data.  The formatter takes ownership of the DateFormatSymbols object;
313     * the caller is no longer responsible for deleting it.
314     * @param pattern           the given pattern for the format.
315     * @param formatDataToAdopt the symbols to be adopted.
316     * @param status            Output param set to success/faulure code.
317     * @stable ICU 2.0
318     */
319    SimpleDateFormat(const UnicodeString& pattern,
320                     DateFormatSymbols* formatDataToAdopt,
321                     UErrorCode& status);
322
323    /**
324     * Construct a SimpleDateFormat using the given pattern and locale-specific
325     * symbol data.  The DateFormatSymbols object is NOT adopted; the caller
326     * remains responsible for deleting it.
327     * @param pattern           the given pattern for the format.
328     * @param formatData        the formatting symbols to be use.
329     * @param status            Output param set to success/faulure code.
330     * @stable ICU 2.0
331     */
332    SimpleDateFormat(const UnicodeString& pattern,
333                     const DateFormatSymbols& formatData,
334                     UErrorCode& status);
335
336    /**
337     * Copy constructor.
338     * @stable ICU 2.0
339     */
340    SimpleDateFormat(const SimpleDateFormat&);
341
342    /**
343     * Assignment operator.
344     * @stable ICU 2.0
345     */
346    SimpleDateFormat& operator=(const SimpleDateFormat&);
347
348    /**
349     * Destructor.
350     * @stable ICU 2.0
351     */
352    virtual ~SimpleDateFormat();
353
354    /**
355     * Clone this Format object polymorphically. The caller owns the result and
356     * should delete it when done.
357     * @return    A copy of the object.
358     * @stable ICU 2.0
359     */
360    virtual Format* clone(void) const;
361
362    /**
363     * Return true if the given Format objects are semantically equal. Objects
364     * of different subclasses are considered unequal.
365     * @param other    the object to be compared with.
366     * @return         true if the given Format objects are semantically equal.
367     * @stable ICU 2.0
368     */
369    virtual UBool operator==(const Format& other) const;
370
371
372    using DateFormat::format;
373
374    /**
375     * Format a date or time, which is the standard millis since 24:00 GMT, Jan
376     * 1, 1970. Overrides DateFormat pure virtual method.
377     * <P>
378     * Example: using the US locale: "yyyy.MM.dd e 'at' HH:mm:ss zzz" ->>
379     * 1996.07.10 AD at 15:08:56 PDT
380     *
381     * @param cal       Calendar set to the date and time to be formatted
382     *                  into a date/time string.
383     * @param appendTo  Output parameter to receive result.
384     *                  Result is appended to existing contents.
385     * @param pos       The formatting position. On input: an alignment field,
386     *                  if desired. On output: the offsets of the alignment field.
387     * @return          Reference to 'appendTo' parameter.
388     * @stable ICU 2.1
389     */
390    virtual UnicodeString& format(  Calendar& cal,
391                                    UnicodeString& appendTo,
392                                    FieldPosition& pos) const;
393
394    /**
395     * Format a date or time, which is the standard millis since 24:00 GMT, Jan
396     * 1, 1970. Overrides DateFormat pure virtual method.
397     * <P>
398     * Example: using the US locale: "yyyy.MM.dd e 'at' HH:mm:ss zzz" ->>
399     * 1996.07.10 AD at 15:08:56 PDT
400     *
401     * @param cal       Calendar set to the date and time to be formatted
402     *                  into a date/time string.
403     * @param appendTo  Output parameter to receive result.
404     *                  Result is appended to existing contents.
405     * @param posIter   On return, can be used to iterate over positions
406     *                  of fields generated by this format call.  Field values
407     *                  are defined in UDateFormatField.
408     * @param status    Input/output param set to success/failure code.
409     * @return          Reference to 'appendTo' parameter.
410     * @stable ICU 4.4
411     */
412    virtual UnicodeString& format(  Calendar& cal,
413                                    UnicodeString& appendTo,
414                                    FieldPositionIterator* posIter,
415                                    UErrorCode& status) const;
416
417    /**
418     * Format a date or time, which is the standard millis since 24:00 GMT, Jan
419     * 1, 1970. Overrides DateFormat pure virtual method.
420     * <P>
421     * Example: using the US locale: "yyyy.MM.dd e 'at' HH:mm:ss zzz" ->>
422     * 1996.07.10 AD at 15:08:56 PDT
423     *
424     * @param obj       A Formattable containing the date-time value to be formatted
425     *                  into a date-time string.  If the type of the Formattable
426     *                  is a numeric type, it is treated as if it were an
427     *                  instance of Date.
428     * @param appendTo  Output parameter to receive result.
429     *                  Result is appended to existing contents.
430     * @param pos       The formatting position. On input: an alignment field,
431     *                  if desired. On output: the offsets of the alignment field.
432     * @param status    Input/output param set to success/failure code.
433     * @return          Reference to 'appendTo' parameter.
434     * @stable ICU 2.0
435     */
436    virtual UnicodeString& format(  const Formattable& obj,
437                                    UnicodeString& appendTo,
438                                    FieldPosition& pos,
439                                    UErrorCode& status) const;
440
441    /**
442     * Format a date or time, which is the standard millis since 24:00 GMT, Jan
443     * 1, 1970. Overrides DateFormat pure virtual method.
444     * <P>
445     * Example: using the US locale: "yyyy.MM.dd e 'at' HH:mm:ss zzz" ->>
446     * 1996.07.10 AD at 15:08:56 PDT
447     *
448     * @param obj       A Formattable containing the date-time value to be formatted
449     *                  into a date-time string.  If the type of the Formattable
450     *                  is a numeric type, it is treated as if it were an
451     *                  instance of Date.
452     * @param appendTo  Output parameter to receive result.
453     *                  Result is appended to existing contents.
454     * @param posIter   On return, can be used to iterate over positions
455     *                  of fields generated by this format call.  Field values
456     *                  are defined in UDateFormatField.
457     * @param status    Input/output param set to success/failure code.
458     * @return          Reference to 'appendTo' parameter.
459     * @stable ICU 4.4
460     */
461    virtual UnicodeString& format(  const Formattable& obj,
462                                    UnicodeString& appendTo,
463                                    FieldPositionIterator* posIter,
464                                    UErrorCode& status) const;
465
466    /**
467     * Redeclared DateFormat method.
468     * @param date          the Date value to be formatted.
469     * @param appendTo      Output parameter to receive result.
470     *                      Result is appended to existing contents.
471     * @param fieldPosition The formatting position. On input: an alignment field,
472     *                      if desired. On output: the offsets of the alignment field.
473     * @return              Reference to 'appendTo' parameter.
474     * @stable ICU 2.1
475     */
476    UnicodeString& format(UDate date,
477                          UnicodeString& appendTo,
478                          FieldPosition& fieldPosition) const;
479
480    /**
481     * Redeclared DateFormat method.
482     * @param date          the Date value to be formatted.
483     * @param appendTo      Output parameter to receive result.
484     *                      Result is appended to existing contents.
485     * @param posIter       On return, can be used to iterate over positions
486     *                      of fields generated by this format call.  Field values
487     *                      are defined in UDateFormatField.
488     * @param status        Input/output param set to success/failure code.
489     * @return              Reference to 'appendTo' parameter.
490     * @stable ICU 4.4
491     */
492    UnicodeString& format(UDate date,
493                          UnicodeString& appendTo,
494                          FieldPositionIterator* posIter,
495                          UErrorCode& status) const;
496
497    /**
498     * Redeclared DateFormat method.
499     * @param obj       Object to be formatted.
500     * @param appendTo  Output parameter to receive result.
501     *                  Result is appended to existing contents.
502     * @param status    Input/output success/failure code.
503     * @return          Reference to 'appendTo' parameter.
504     * @stable ICU 2.0
505     */
506    UnicodeString& format(const Formattable& obj,
507                          UnicodeString& appendTo,
508                          UErrorCode& status) const;
509
510    /**
511     * Redeclared DateFormat method.
512     * @param date      Date value to be formatted.
513     * @param appendTo  Output parameter to receive result.
514     *                  Result is appended to existing contents.
515     * @return          Reference to 'appendTo' parameter.
516     * @stable ICU 2.0
517     */
518    UnicodeString& format(UDate date, UnicodeString& appendTo) const;
519
520    /**
521     * Parse a date/time string beginning at the given parse position. For
522     * example, a time text "07/10/96 4:5 PM, PDT" will be parsed into a Date
523     * that is equivalent to Date(837039928046).
524     * <P>
525     * By default, parsing is lenient: If the input is not in the form used by
526     * this object's format method but can still be parsed as a date, then the
527     * parse succeeds. Clients may insist on strict adherence to the format by
528     * calling setLenient(false).
529     *
530     * @param text  The date/time string to be parsed
531     * @param cal   a Calendar set to the date and time to be formatted
532     *              into a date/time string.
533     * @param pos   On input, the position at which to start parsing; on
534     *              output, the position at which parsing terminated, or the
535     *              start position if the parse failed.
536     * @return      A valid UDate if the input could be parsed.
537     * @stable ICU 2.1
538     */
539    virtual void parse( const UnicodeString& text,
540                        Calendar& cal,
541                        ParsePosition& pos) const;
542
543    /**
544     * Parse a date/time string starting at the given parse position. For
545     * example, a time text "07/10/96 4:5 PM, PDT" will be parsed into a Date
546     * that is equivalent to Date(837039928046).
547     * <P>
548     * By default, parsing is lenient: If the input is not in the form used by
549     * this object's format method but can still be parsed as a date, then the
550     * parse succeeds. Clients may insist on strict adherence to the format by
551     * calling setLenient(false).
552     *
553     * @see DateFormat::setLenient(boolean)
554     *
555     * @param text  The date/time string to be parsed
556     * @param pos   On input, the position at which to start parsing; on
557     *              output, the position at which parsing terminated, or the
558     *              start position if the parse failed.
559     * @return      A valid UDate if the input could be parsed.
560     * @stable ICU 2.0
561     */
562    UDate parse( const UnicodeString& text,
563                 ParsePosition& pos) const;
564
565
566    /**
567     * Parse a date/time string. For example, a time text "07/10/96 4:5 PM, PDT"
568     * will be parsed into a UDate that is equivalent to Date(837039928046).
569     * Parsing begins at the beginning of the string and proceeds as far as
570     * possible.  Assuming no parse errors were encountered, this function
571     * doesn't return any information about how much of the string was consumed
572     * by the parsing.  If you need that information, use the version of
573     * parse() that takes a ParsePosition.
574     *
575     * @param text  The date/time string to be parsed
576     * @param status Filled in with U_ZERO_ERROR if the parse was successful, and with
577     *              an error value if there was a parse error.
578     * @return      A valid UDate if the input could be parsed.
579     * @stable ICU 2.0
580     */
581    virtual UDate parse( const UnicodeString& text,
582                        UErrorCode& status) const;
583
584    /**
585     * Set the start UDate used to interpret two-digit year strings.
586     * When dates are parsed having 2-digit year strings, they are placed within
587     * a assumed range of 100 years starting on the two digit start date.  For
588     * example, the string "24-Jan-17" may be in the year 1817, 1917, 2017, or
589     * some other year.  SimpleDateFormat chooses a year so that the resultant
590     * date is on or after the two digit start date and within 100 years of the
591     * two digit start date.
592     * <P>
593     * By default, the two digit start date is set to 80 years before the current
594     * time at which a SimpleDateFormat object is created.
595     * @param d      start UDate used to interpret two-digit year strings.
596     * @param status Filled in with U_ZERO_ERROR if the parse was successful, and with
597     *               an error value if there was a parse error.
598     * @stable ICU 2.0
599     */
600    virtual void set2DigitYearStart(UDate d, UErrorCode& status);
601
602    /**
603     * Get the start UDate used to interpret two-digit year strings.
604     * When dates are parsed having 2-digit year strings, they are placed within
605     * a assumed range of 100 years starting on the two digit start date.  For
606     * example, the string "24-Jan-17" may be in the year 1817, 1917, 2017, or
607     * some other year.  SimpleDateFormat chooses a year so that the resultant
608     * date is on or after the two digit start date and within 100 years of the
609     * two digit start date.
610     * <P>
611     * By default, the two digit start date is set to 80 years before the current
612     * time at which a SimpleDateFormat object is created.
613     * @param status Filled in with U_ZERO_ERROR if the parse was successful, and with
614     *               an error value if there was a parse error.
615     * @stable ICU 2.0
616     */
617    UDate get2DigitYearStart(UErrorCode& status) const;
618
619    /**
620     * Return a pattern string describing this date format.
621     * @param result Output param to receive the pattern.
622     * @return       A reference to 'result'.
623     * @stable ICU 2.0
624     */
625    virtual UnicodeString& toPattern(UnicodeString& result) const;
626
627    /**
628     * Return a localized pattern string describing this date format.
629     * In most cases, this will return the same thing as toPattern(),
630     * but a locale can specify characters to use in pattern descriptions
631     * in place of the ones described in this class's class documentation.
632     * (Presumably, letters that would be more mnemonic in that locale's
633     * language.)  This function would produce a pattern using those
634     * letters.
635     *
636     * @param result    Receives the localized pattern.
637     * @param status    Output param set to success/failure code on
638     *                  exit. If the pattern is invalid, this will be
639     *                  set to a failure result.
640     * @return          A reference to 'result'.
641     * @stable ICU 2.0
642     */
643    virtual UnicodeString& toLocalizedPattern(UnicodeString& result,
644                                              UErrorCode& status) const;
645
646    /**
647     * Apply the given unlocalized pattern string to this date format.
648     * (i.e., after this call, this formatter will format dates according to
649     * the new pattern)
650     *
651     * @param pattern   The pattern to be applied.
652     * @stable ICU 2.0
653     */
654    virtual void applyPattern(const UnicodeString& pattern);
655
656    /**
657     * Apply the given localized pattern string to this date format.
658     * (see toLocalizedPattern() for more information on localized patterns.)
659     *
660     * @param pattern   The localized pattern to be applied.
661     * @param status    Output param set to success/failure code on
662     *                  exit. If the pattern is invalid, this will be
663     *                  set to a failure result.
664     * @stable ICU 2.0
665     */
666    virtual void applyLocalizedPattern(const UnicodeString& pattern,
667                                       UErrorCode& status);
668
669    /**
670     * Gets the date/time formatting symbols (this is an object carrying
671     * the various strings and other symbols used in formatting: e.g., month
672     * names and abbreviations, time zone names, AM/PM strings, etc.)
673     * @return a copy of the date-time formatting data associated
674     * with this date-time formatter.
675     * @stable ICU 2.0
676     */
677    virtual const DateFormatSymbols* getDateFormatSymbols(void) const;
678
679    /**
680     * Set the date/time formatting symbols.  The caller no longer owns the
681     * DateFormatSymbols object and should not delete it after making this call.
682     * @param newFormatSymbols the given date-time formatting symbols to copy.
683     * @stable ICU 2.0
684     */
685    virtual void adoptDateFormatSymbols(DateFormatSymbols* newFormatSymbols);
686
687    /**
688     * Set the date/time formatting data.
689     * @param newFormatSymbols the given date-time formatting symbols to copy.
690     * @stable ICU 2.0
691     */
692    virtual void setDateFormatSymbols(const DateFormatSymbols& newFormatSymbols);
693
694    /**
695     * Return the class ID for this class. This is useful only for comparing to
696     * a return value from getDynamicClassID(). For example:
697     * <pre>
698     * .   Base* polymorphic_pointer = createPolymorphicObject();
699     * .   if (polymorphic_pointer->getDynamicClassID() ==
700     * .       erived::getStaticClassID()) ...
701     * </pre>
702     * @return          The class ID for all objects of this class.
703     * @stable ICU 2.0
704     */
705    static UClassID U_EXPORT2 getStaticClassID(void);
706
707    /**
708     * Returns a unique class ID POLYMORPHICALLY. Pure virtual override. This
709     * method is to implement a simple version of RTTI, since not all C++
710     * compilers support genuine RTTI. Polymorphic operator==() and clone()
711     * methods call this method.
712     *
713     * @return          The class ID for this object. All objects of a
714     *                  given class have the same class ID.  Objects of
715     *                  other classes have different class IDs.
716     * @stable ICU 2.0
717     */
718    virtual UClassID getDynamicClassID(void) const;
719
720    /**
721     * Set the calendar to be used by this date format. Initially, the default
722     * calendar for the specified or default locale is used.  The caller should
723     * not delete the Calendar object after it is adopted by this call.
724     * Adopting a new calendar will change to the default symbols.
725     *
726     * @param calendarToAdopt    Calendar object to be adopted.
727     * @stable ICU 2.0
728     */
729    virtual void adoptCalendar(Calendar* calendarToAdopt);
730
731    /**
732     * This is for ICU internal use only. Please do not use.
733     * Check whether the 'field' is smaller than all the fields covered in
734     * pattern, return TRUE if it is. The sequence of calendar field,
735     * from large to small is: ERA, YEAR, MONTH, DATE, AM_PM, HOUR, MINUTE,...
736     * @param field    the calendar field need to check against
737     * @return         TRUE if the 'field' is smaller than all the fields
738     *                 covered in pattern. FALSE otherwise.
739     * @internal ICU 4.0
740     */
741    UBool isFieldUnitIgnored(UCalendarDateFields field) const;
742
743
744    /**
745     * This is for ICU internal use only. Please do not use.
746     * Check whether the 'field' is smaller than all the fields covered in
747     * pattern, return TRUE if it is. The sequence of calendar field,
748     * from large to small is: ERA, YEAR, MONTH, DATE, AM_PM, HOUR, MINUTE,...
749     * @param pattern  the pattern to check against
750     * @param field    the calendar field need to check against
751     * @return         TRUE if the 'field' is smaller than all the fields
752     *                 covered in pattern. FALSE otherwise.
753     * @internal ICU 4.0
754     */
755    static UBool isFieldUnitIgnored(const UnicodeString& pattern,
756                                    UCalendarDateFields field);
757
758
759
760    /**
761     * This is for ICU internal use only. Please do not use.
762     * Get the locale of this simple date formatter.
763     * It is used in DateIntervalFormat.
764     *
765     * @return   locale in this simple date formatter
766     * @internal ICU 4.0
767     */
768    const Locale& getSmpFmtLocale(void) const;
769
770
771private:
772    friend class DateFormat;
773
774    void initializeDefaultCentury(void);
775
776    SimpleDateFormat(); // default constructor not implemented
777
778    /**
779     * Used by the DateFormat factory methods to construct a SimpleDateFormat.
780     * @param timeStyle the time style.
781     * @param dateStyle the date style.
782     * @param locale    the given locale.
783     * @param status    Output param set to success/failure code on
784     *                  exit.
785     */
786    SimpleDateFormat(EStyle timeStyle, EStyle dateStyle, const Locale& locale, UErrorCode& status);
787
788    /**
789     * Construct a SimpleDateFormat for the given locale.  If no resource data
790     * is available, create an object of last resort, using hard-coded strings.
791     * This is an internal method, called by DateFormat.  It should never fail.
792     * @param locale    the given locale.
793     * @param status    Output param set to success/failure code on
794     *                  exit.
795     */
796    SimpleDateFormat(const Locale& locale, UErrorCode& status); // Use default pattern
797
798    /**
799     * Hook called by format(... FieldPosition& ...) and format(...FieldPositionIterator&...)
800     */
801    UnicodeString& _format(Calendar& cal, UnicodeString& appendTo, FieldPositionHandler& handler,
802           UErrorCode& status) const;
803
804    /**
805     * Called by format() to format a single field.
806     *
807     * @param appendTo  Output parameter to receive result.
808     *                  Result is appended to existing contents.
809     * @param ch        The format character we encountered in the pattern.
810     * @param count     Number of characters in the current pattern symbol (e.g.,
811     *                  "yyyy" in the pattern would result in a call to this function
812     *                  with ch equal to 'y' and count equal to 4)
813     * @param handler   Records information about field positions.
814     * @param cal       Calendar to use
815     * @param status    Receives a status code, which will be U_ZERO_ERROR if the operation
816     *                  succeeds.
817     */
818    void subFormat(UnicodeString &appendTo,
819                   UChar ch,
820                   int32_t count,
821                   FieldPositionHandler& handler,
822                   Calendar& cal,
823                   UErrorCode& status) const; // in case of illegal argument
824
825    /**
826     * Used by subFormat() to format a numeric value.
827     * Appends to toAppendTo a string representation of "value"
828     * having a number of digits between "minDigits" and
829     * "maxDigits".  Uses the DateFormat's NumberFormat.
830     *
831     * @param currentNumberFormat
832     * @param appendTo  Output parameter to receive result.
833     *                  Formatted number is appended to existing contents.
834     * @param value     Value to format.
835     * @param minDigits Minimum number of digits the result should have
836     * @param maxDigits Maximum number of digits the result should have
837     */
838    void zeroPaddingNumber(NumberFormat *currentNumberFormat,
839                           UnicodeString &appendTo,
840                           int32_t value,
841                           int32_t minDigits,
842                           int32_t maxDigits) const;
843
844    /**
845     * Return true if the given format character, occuring count
846     * times, represents a numeric field.
847     */
848    static UBool isNumeric(UChar formatChar, int32_t count);
849
850    /**
851     * initializes fCalendar from parameters.  Returns fCalendar as a convenience.
852     * @param adoptZone  Zone to be adopted, or NULL for TimeZone::createDefault().
853     * @param locale Locale of the calendar
854     * @param status Error code
855     * @return the newly constructed fCalendar
856     */
857    Calendar *initializeCalendar(TimeZone* adoptZone, const Locale& locale, UErrorCode& status);
858
859    /**
860     * initializes fSymbols from parameters.
861     * @param locale Locale of the symbols
862     * @param calendar Alias to Calendar that will be used.
863     * @param status Error code
864     */
865    void initializeSymbols(const Locale& locale, Calendar* calendar, UErrorCode& status);
866
867    /**
868     * Called by several of the constructors to load pattern data and formatting symbols
869     * out of a resource bundle and initialize the locale based on it.
870     * @param timeStyle     The time style, as passed to DateFormat::createDateInstance().
871     * @param dateStyle     The date style, as passed to DateFormat::createTimeInstance().
872     * @param locale        The locale to load the patterns from.
873     * @param status        Filled in with an error code if loading the data from the
874     *                      resources fails.
875     */
876    void construct(EStyle timeStyle, EStyle dateStyle, const Locale& locale, UErrorCode& status);
877
878    /**
879     * Called by construct() and the various constructors to set up the SimpleDateFormat's
880     * Calendar and NumberFormat objects.
881     * @param locale    The locale for which we want a Calendar and a NumberFormat.
882     * @param status    Filled in with an error code if creating either subobject fails.
883     */
884    void initialize(const Locale& locale, UErrorCode& status);
885
886    /**
887     * Private code-size reduction function used by subParse.
888     * @param text the time text being parsed.
889     * @param start where to start parsing.
890     * @param field the date field being parsed.
891     * @param stringArray the string array to parsed.
892     * @param stringArrayCount the size of the array.
893     * @param cal a Calendar set to the date and time to be formatted
894     *            into a date/time string.
895     * @return the new start position if matching succeeded; a negative number
896     * indicating matching failure, otherwise.
897     */
898    int32_t matchString(const UnicodeString& text, int32_t start, UCalendarDateFields field,
899                        const UnicodeString* stringArray, int32_t stringArrayCount, Calendar& cal) const;
900
901    /**
902     * Private code-size reduction function used by subParse.
903     * @param text the time text being parsed.
904     * @param start where to start parsing.
905     * @param field the date field being parsed.
906     * @param stringArray the string array to parsed.
907     * @param stringArrayCount the size of the array.
908     * @param cal a Calendar set to the date and time to be formatted
909     *            into a date/time string.
910     * @return the new start position if matching succeeded; a negative number
911     * indicating matching failure, otherwise.
912     */
913    int32_t matchQuarterString(const UnicodeString& text, int32_t start, UCalendarDateFields field,
914                               const UnicodeString* stringArray, int32_t stringArrayCount, Calendar& cal) const;
915
916    /**
917     * Private function used by subParse to match literal pattern text.
918     *
919     * @param pattern the pattern string
920     * @param patternOffset the starting offset into the pattern text. On
921     *        outupt will be set the offset of the first non-literal character in the pattern
922     * @param text the text being parsed
923     * @param textOffset the starting offset into the text. On output
924     *                   will be set to the offset of the character after the match
925     * @param lenient <code>TRUE</code> if the parse is lenient, <code>FALSE</code> otherwise.
926     *
927     * @return <code>TRUE</code> if the literal text could be matched, <code>FALSE</code> otherwise.
928     */
929    static UBool matchLiterals(const UnicodeString &pattern, int32_t &patternOffset,
930                               const UnicodeString &text, int32_t &textOffset, UBool lenient);
931
932    /**
933     * Private member function that converts the parsed date strings into
934     * timeFields. Returns -start (for ParsePosition) if failed.
935     * @param text the time text to be parsed.
936     * @param start where to start parsing.
937     * @param ch the pattern character for the date field text to be parsed.
938     * @param count the count of a pattern character.
939     * @param obeyCount if true then the count is strictly obeyed.
940     * @param allowNegative
941     * @param ambiguousYear If true then the two-digit year == the default start year.
942     * @param saveHebrewMonth Used to hang onto month until year is known.
943     * @param cal a Calendar set to the date and time to be formatted
944     *            into a date/time string.
945     * @param patLoc
946     * @return the new start position if matching succeeded; a negative number
947     * indicating matching failure, otherwise.
948     */
949    int32_t subParse(const UnicodeString& text, int32_t& start, UChar ch, int32_t count,
950                     UBool obeyCount, UBool allowNegative, UBool ambiguousYear[], int32_t& saveHebrewMonth, Calendar& cal,
951                     int32_t patLoc) const;
952
953    void parseInt(const UnicodeString& text,
954                  Formattable& number,
955                  ParsePosition& pos,
956                  UBool allowNegative,
957                  NumberFormat *fmt) const;
958
959    void parseInt(const UnicodeString& text,
960                  Formattable& number,
961                  int32_t maxDigits,
962                  ParsePosition& pos,
963                  UBool allowNegative,
964                  NumberFormat *fmt) const;
965
966    int32_t checkIntSuffix(const UnicodeString& text, int32_t start,
967                           int32_t patLoc, UBool isNegative) const;
968
969    /**
970     * Translate a pattern, mapping each character in the from string to the
971     * corresponding character in the to string. Return an error if the original
972     * pattern contains an unmapped character, or if a quote is unmatched.
973     * Quoted (single quotes only) material is not translated.
974     * @param originalPattern   the original pattern.
975     * @param translatedPattern Output param to receive the translited pattern.
976     * @param from              the characters to be translited from.
977     * @param to                the characters to be translited to.
978     * @param status            Receives a status code, which will be U_ZERO_ERROR
979     *                          if the operation succeeds.
980     */
981    static void translatePattern(const UnicodeString& originalPattern,
982                                UnicodeString& translatedPattern,
983                                const UnicodeString& from,
984                                const UnicodeString& to,
985                                UErrorCode& status);
986
987    /**
988     * Sets the starting date of the 100-year window that dates with 2-digit years
989     * are considered to fall within.
990     * @param startDate the start date
991     * @param status    Receives a status code, which will be U_ZERO_ERROR
992     *                  if the operation succeeds.
993     */
994    void         parseAmbiguousDatesAsAfter(UDate startDate, UErrorCode& status);
995
996    /**
997     * Return the length matched by the given affix, or -1 if none.
998     * Runs of white space in the affix, match runs of white space in
999     * the input.
1000     * @param affix pattern string, taken as a literal
1001     * @param input input text
1002     * @param pos offset into input at which to begin matching
1003     * @return length of input that matches, or -1 if match failure
1004     */
1005    int32_t compareSimpleAffix(const UnicodeString& affix,
1006                   const UnicodeString& input,
1007                   int32_t pos) const;
1008
1009    /**
1010     * Skip over a run of zero or more Pattern_White_Space characters at
1011     * pos in text.
1012     */
1013    int32_t skipPatternWhiteSpace(const UnicodeString& text, int32_t pos) const;
1014
1015    /**
1016     * Skip over a run of zero or more isUWhiteSpace() characters at pos
1017     * in text.
1018     */
1019    int32_t skipUWhiteSpace(const UnicodeString& text, int32_t pos) const;
1020
1021    /**
1022     * Private methods for formatting/parsing GMT string
1023     */
1024    void appendGMT(NumberFormat *currentNumberFormat,UnicodeString &appendTo, Calendar& cal, UErrorCode& status) const;
1025    void formatGMTDefault(NumberFormat *currentNumberFormat,UnicodeString &appendTo, int32_t offset) const;
1026    int32_t parseGMT(const UnicodeString &text, ParsePosition &pos) const;
1027    int32_t parseGMTDefault(const UnicodeString &text, ParsePosition &pos) const;
1028    UBool isDefaultGMTFormat() const;
1029
1030    void formatRFC822TZ(UnicodeString &appendTo, int32_t offset) const;
1031
1032    /**
1033     * Initialize MessageFormat instances used for GMT formatting/parsing
1034     */
1035    void initGMTFormatters(UErrorCode &status);
1036
1037    /**
1038     * Initialize NumberFormat instances used for numbering system overrides.
1039     */
1040    void initNumberFormatters(const Locale &locale,UErrorCode &status);
1041
1042    /**
1043     * Get the numbering system to be used for a particular field.
1044     */
1045     NumberFormat * getNumberFormatByIndex(UDateFormatField index) const;
1046
1047    /**
1048     * Parse the given override string and set up structures for number formats
1049     */
1050    void processOverrideString(const Locale &locale, const UnicodeString &str, int8_t type, UErrorCode &status);
1051
1052    /**
1053     * Used to map pattern characters to Calendar field identifiers.
1054     */
1055    static const UCalendarDateFields fgPatternIndexToCalendarField[];
1056
1057    /**
1058     * Map index into pattern character string to DateFormat field number
1059     */
1060    static const UDateFormatField fgPatternIndexToDateFormatField[];
1061
1062    /**
1063     * Lazy TimeZoneFormat instantiation, semantically const
1064     */
1065    TimeZoneFormat *tzFormat() const;
1066
1067    /**
1068     * Used to map Calendar field to field level.
1069     * The larger the level, the smaller the field unit.
1070     * For example, UCAL_ERA level is 0, UCAL_YEAR level is 10,
1071     * UCAL_MONTH level is 20.
1072     */
1073    static const int32_t fgCalendarFieldToLevel[];
1074    static const int32_t fgPatternCharToLevel[];
1075
1076    /**
1077     * The formatting pattern for this formatter.
1078     */
1079    UnicodeString       fPattern;
1080
1081    /**
1082     * The numbering system override for dates.
1083     */
1084    UnicodeString       fDateOverride;
1085
1086    /**
1087     * The numbering system override for times.
1088     */
1089    UnicodeString       fTimeOverride;
1090
1091
1092    /**
1093     * The original locale used (for reloading symbols)
1094     */
1095    Locale              fLocale;
1096
1097    /**
1098     * A pointer to an object containing the strings to use in formatting (e.g.,
1099     * month and day names, AM and PM strings, time zone names, etc.)
1100     */
1101    DateFormatSymbols*  fSymbols;   // Owned
1102
1103    /**
1104     * The time zone formatter
1105     */
1106    TimeZoneFormat* fTimeZoneFormat;
1107
1108    /**
1109     * If dates have ambiguous years, we map them into the century starting
1110     * at defaultCenturyStart, which may be any date.  If defaultCenturyStart is
1111     * set to SYSTEM_DEFAULT_CENTURY, which it is by default, then the system
1112     * values are used.  The instance values defaultCenturyStart and
1113     * defaultCenturyStartYear are only used if explicitly set by the user
1114     * through the API method parseAmbiguousDatesAsAfter().
1115     */
1116    UDate                fDefaultCenturyStart;
1117
1118    /**
1119     * See documentation for defaultCenturyStart.
1120     */
1121    /*transient*/ int32_t   fDefaultCenturyStartYear;
1122
1123    enum ParsedTZType {
1124        TZTYPE_UNK,
1125        TZTYPE_STD,
1126        TZTYPE_DST
1127    };
1128
1129    ParsedTZType tztype; // here to avoid api change
1130
1131    typedef struct NSOverride {
1132        NumberFormat *nf;
1133        int32_t hash;
1134        NSOverride *next;
1135    } NSOverride;
1136
1137    /*
1138     * MessageFormat instances used for localized GMT format
1139     */
1140    enum {
1141        kGMTNegativeHMS = 0,
1142        kGMTNegativeHM,
1143        kGMTPositiveHMS,
1144        kGMTPositiveHM,
1145
1146        kNumGMTFormatters
1147    };
1148    enum {
1149        kGMTNegativeHMSMinLenIdx = 0,
1150        kGMTPositiveHMSMinLenIdx,
1151
1152        kNumGMTFormatMinLengths
1153    };
1154
1155    MessageFormat   **fGMTFormatters;
1156    // If a GMT hour format has a second field, we need to make sure
1157    // the length of input localized GMT string must match the expected
1158    // length.  Otherwise, sub DateForamt handling offset format may
1159    // unexpectedly success parsing input GMT string without second field.
1160    // See #6880 about this issue.
1161    // TODO: SimpleDateFormat should provide an option to invalidate
1162    //
1163    int32_t         fGMTFormatHmsMinLen[kNumGMTFormatMinLengths];
1164
1165    NumberFormat    **fNumberFormatters;
1166
1167    NSOverride      *fOverrideList;
1168
1169    UBool fHaveDefaultCentury;
1170};
1171
1172inline UDate
1173SimpleDateFormat::get2DigitYearStart(UErrorCode& /*status*/) const
1174{
1175    return fDefaultCenturyStart;
1176}
1177
1178inline UnicodeString&
1179SimpleDateFormat::format(const Formattable& obj,
1180                         UnicodeString& appendTo,
1181                         UErrorCode& status) const {
1182    // Don't use Format:: - use immediate base class only,
1183    // in case immediate base modifies behavior later.
1184    return DateFormat::format(obj, appendTo, status);
1185}
1186
1187inline UnicodeString&
1188SimpleDateFormat::format(const Formattable& obj,
1189                         UnicodeString& appendTo,
1190                         FieldPosition& pos,
1191                         UErrorCode& status) const
1192{
1193    // Don't use Format:: - use immediate base class only,
1194    // in case immediate base modifies behavior later.
1195    return DateFormat::format(obj, appendTo, pos, status);
1196}
1197
1198inline UnicodeString&
1199SimpleDateFormat::format(const Formattable& obj,
1200                         UnicodeString& appendTo,
1201                         FieldPositionIterator* posIter,
1202                         UErrorCode& status) const
1203{
1204    // Don't use Format:: - use immediate base class only,
1205    // in case immediate base modifies behavior later.
1206    return DateFormat::format(obj, appendTo, posIter, status);
1207}
1208
1209inline UnicodeString&
1210SimpleDateFormat::format(UDate date,
1211                         UnicodeString& appendTo,
1212                         FieldPosition& fieldPosition) const {
1213    // Don't use Format:: - use immediate base class only,
1214    // in case immediate base modifies behavior later.
1215    return DateFormat::format(date, appendTo, fieldPosition);
1216}
1217
1218inline UnicodeString&
1219SimpleDateFormat::format(UDate date,
1220                         UnicodeString& appendTo,
1221                         FieldPositionIterator* posIter,
1222                         UErrorCode& status) const {
1223    // Don't use Format:: - use immediate base class only,
1224    // in case immediate base modifies behavior later.
1225    return DateFormat::format(date, appendTo, posIter, status);
1226}
1227
1228inline UnicodeString&
1229SimpleDateFormat::format(UDate date, UnicodeString& appendTo) const {
1230    return DateFormat::format(date, appendTo);
1231}
1232
1233U_NAMESPACE_END
1234
1235#endif /* #if !UCONFIG_NO_FORMATTING */
1236
1237#endif // _SMPDTFMT
1238//eof
1239