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+/*
+* Copyright (C) 1997-2010, International Business Machines Corporation and
+* others. All Rights Reserved.
+*******************************************************************************
+*
+* File SMPDTFMT.H
+*
+* Modification History:
+*
+* Date Name Description
+* 02/19/97 aliu Converted from java.
+* 07/09/97 helena Make ParsePosition into a class.
+* 07/21/98 stephen Added GMT_PLUS, GMT_MINUS
+* Changed setTwoDigitStartDate to set2DigitYearStart
+* Changed getTwoDigitStartDate to get2DigitYearStart
+* Removed subParseLong
+* Removed getZoneIndex (added in DateFormatSymbols)
+* 06/14/99 stephen Removed fgTimeZoneDataSuffix
+* 10/14/99 aliu Updated class doc to describe 2-digit year parsing
+* {j28 4182066}.
+*******************************************************************************
+*/
+
+#ifndef SMPDTFMT_H
+#define SMPDTFMT_H
+
+#include "unicode/utypes.h"
+
+/**
+ * \file
+ * \brief C++ API: Format and parse dates in a language-independent manner.
+ */
+
+#if !UCONFIG_NO_FORMATTING
+
+#include "unicode/datefmt.h"
+
+U_NAMESPACE_BEGIN
+
+class DateFormatSymbols;
+class DateFormat;
+class MessageFormat;
+class FieldPositionHandler;
+
+/**
+ *
+ * SimpleDateFormat is a concrete class for formatting and parsing dates in a
+ * language-independent manner. It allows for formatting (millis -> text),
+ * parsing (text -> millis), and normalization. Formats/Parses a date or time,
+ * which is the standard milliseconds since 24:00 GMT, Jan 1, 1970.
+ * <P>
+ * Clients are encouraged to create a date-time formatter using DateFormat::getInstance(),
+ * getDateInstance(), getDateInstance(), or getDateTimeInstance() rather than
+ * explicitly constructing an instance of SimpleDateFormat. This way, the client
+ * is guaranteed to get an appropriate formatting pattern for whatever locale the
+ * program is running in. However, if the client needs something more unusual than
+ * the default patterns in the locales, he can construct a SimpleDateFormat directly
+ * and give it an appropriate pattern (or use one of the factory methods on DateFormat
+ * and modify the pattern after the fact with toPattern() and applyPattern().
+ * <P>
+ * Date/Time format syntax:
+ * <P>
+ * The date/time format is specified by means of a string time pattern. In this
+ * pattern, all ASCII letters are reserved as pattern letters, which are defined
+ * as the following:
+ * <pre>
+ * \code
+ * Symbol Meaning Presentation Example
+ * ------ ------- ------------ -------
+ * G era designator (Text) AD
+ * y year (Number) 1996
+ * Y year (week of year) (Number) 1997
+ * u extended year (Number) 4601
+ * Q Quarter (Text & Number) Q2 & 02
+ * M month in year (Text & Number) July & 07
+ * d day in month (Number) 10
+ * h hour in am/pm (1~12) (Number) 12
+ * H hour in day (0~23) (Number) 0
+ * m minute in hour (Number) 30
+ * s second in minute (Number) 55
+ * S fractional second (Number) 978
+ * E day of week (Text) Tuesday
+ * e day of week (local 1~7) (Text & Number) Tues & 2
+ * D day in year (Number) 189
+ * F day of week in month (Number) 2 (2nd Wed in July)
+ * w week in year (Number) 27
+ * W week in month (Number) 2
+ * a am/pm marker (Text) PM
+ * k hour in day (1~24) (Number) 24
+ * K hour in am/pm (0~11) (Number) 0
+ * z time zone (Time) Pacific Standard Time
+ * Z time zone (RFC 822) (Number) -0800
+ * v time zone (generic) (Text) Pacific Time
+ * V time zone (abreviation) (Text) PT
+ * VVVV time zone (location) (Text) United States (Los Angeles)
+ * g Julian day (Number) 2451334
+ * A milliseconds in day (Number) 69540000
+ * q stand alone quarter (Text & Number) Q2 & 02
+ * L stand alone month (Text & Number) July & 07
+ * c stand alone day of week (Text & Number) Tuesday & 2
+ * ' escape for text (Delimiter) 'Date='
+ * '' single quote (Literal) 'o''clock'
+ * \endcode
+ * </pre>
+ * The count of pattern letters determine the format.
+ * <P>
+ * (Text): 4 or more, use full form, &lt;4, use short or abbreviated form if it
+ * exists. (e.g., "EEEE" produces "Monday", "EEE" produces "Mon")
+ * <P>
+ * (Number): the minimum number of digits. Shorter numbers are zero-padded to
+ * this amount (e.g. if "m" produces "6", "mm" produces "06"). Year is handled
+ * specially; that is, if the count of 'y' is 2, the Year will be truncated to 2 digits.
+ * (e.g., if "yyyy" produces "1997", "yy" produces "97".)
+ * Unlike other fields, fractional seconds are padded on the right with zero.
+ * <P>
+ * (Text & Number): 3 or over, use text, otherwise use number. (e.g., "M" produces "1",
+ * "MM" produces "01", "MMM" produces "Jan", and "MMMM" produces "January".)
+ * <P>
+ * Any characters in the pattern that are not in the ranges of ['a'..'z'] and
+ * ['A'..'Z'] will be treated as quoted text. For instance, characters
+ * like ':', '.', ' ', '#' and '@' will appear in the resulting time text
+ * even they are not embraced within single quotes.
+ * <P>
+ * A pattern containing any invalid pattern letter will result in a failing
+ * UErrorCode result during formatting or parsing.
+ * <P>
+ * Examples using the US locale:
+ * <pre>
+ * \code
+ * Format Pattern Result
+ * -------------- -------
+ * "yyyy.MM.dd G 'at' HH:mm:ss vvvv" ->> 1996.07.10 AD at 15:08:56 Pacific Time
+ * "EEE, MMM d, ''yy" ->> Wed, July 10, '96
+ * "h:mm a" ->> 12:08 PM
+ * "hh 'o''clock' a, zzzz" ->> 12 o'clock PM, Pacific Daylight Time
+ * "K:mm a, vvv" ->> 0:00 PM, PT
+ * "yyyyy.MMMMM.dd GGG hh:mm aaa" ->> 1996.July.10 AD 12:08 PM
+ * \endcode
+ * </pre>
+ * Code Sample:
+ * <pre>
+ * \code
+ * UErrorCode success = U_ZERO_ERROR;
+ * SimpleTimeZone* pdt = new SimpleTimeZone(-8 * 60 * 60 * 1000, "PST");
+ * pdt->setStartRule( Calendar::APRIL, 1, Calendar::SUNDAY, 2*60*60*1000);
+ * pdt->setEndRule( Calendar::OCTOBER, -1, Calendar::SUNDAY, 2*60*60*1000);
+ *
+ * // Format the current time.
+ * SimpleDateFormat* formatter
+ * = new SimpleDateFormat ("yyyy.MM.dd G 'at' hh:mm:ss a zzz", success );
+ * GregorianCalendar cal(success);
+ * UDate currentTime_1 = cal.getTime(success);
+ * FieldPosition fp(0);
+ * UnicodeString dateString;
+ * formatter->format( currentTime_1, dateString, fp );
+ * cout << "result: " << dateString << endl;
+ *
+ * // Parse the previous string back into a Date.
+ * ParsePosition pp(0);
+ * UDate currentTime_2 = formatter->parse(dateString, pp );
+ * \endcode
+ * </pre>
+ * In the above example, the time value "currentTime_2" obtained from parsing
+ * will be equal to currentTime_1. However, they may not be equal if the am/pm
+ * marker 'a' is left out from the format pattern while the "hour in am/pm"
+ * pattern symbol is used. This information loss can happen when formatting the
+ * time in PM.
+ *
+ * <p>
+ * When parsing a date string using the abbreviated year pattern ("y" or "yy"),
+ * SimpleDateFormat must interpret the abbreviated year
+ * relative to some century. It does this by adjusting dates to be
+ * within 80 years before and 20 years after the time the SimpleDateFormat
+ * instance is created. For example, using a pattern of "MM/dd/yy" and a
+ * SimpleDateFormat instance created on Jan 1, 1997, the string
+ * "01/11/12" would be interpreted as Jan 11, 2012 while the string "05/04/64"
+ * would be interpreted as May 4, 1964.
+ * During parsing, only strings consisting of exactly two digits, as defined by
+ * <code>Unicode::isDigit()</code>, will be parsed into the default century.
+ * Any other numeric string, such as a one digit string, a three or more digit
+ * string, or a two digit string that isn't all digits (for example, "-1"), is
+ * interpreted literally. So "01/02/3" or "01/02/003" are parsed, using the
+ * same pattern, as Jan 2, 3 AD. Likewise, "01/02/-3" is parsed as Jan 2, 4 BC.
+ *
+ * <p>
+ * If the year pattern has more than two 'y' characters, the year is
+ * interpreted literally, regardless of the number of digits. So using the
+ * pattern "MM/dd/yyyy", "01/11/12" parses to Jan 11, 12 A.D.
+ *
+ * <p>
+ * When numeric fields abut one another directly, with no intervening delimiter
+ * characters, they constitute a run of abutting numeric fields. Such runs are
+ * parsed specially. For example, the format "HHmmss" parses the input text
+ * "123456" to 12:34:56, parses the input text "12345" to 1:23:45, and fails to
+ * parse "1234". In other words, the leftmost field of the run is flexible,
+ * while the others keep a fixed width. If the parse fails anywhere in the run,
+ * then the leftmost field is shortened by one character, and the entire run is
+ * parsed again. This is repeated until either the parse succeeds or the
+ * leftmost field is one character in length. If the parse still fails at that
+ * point, the parse of the run fails.
+ *
+ * <P>
+ * For time zones that have no names, SimpleDateFormat uses strings GMT+hours:minutes or
+ * GMT-hours:minutes.
+ * <P>
+ * The calendar defines what is the first day of the week, the first week of the
+ * year, whether hours are zero based or not (0 vs 12 or 24), and the timezone.
+ * There is one common number format to handle all the numbers; the digit count
+ * is handled programmatically according to the pattern.
+ *
+ * <p><em>User subclasses are not supported.</em> While clients may write
+ * subclasses, such code will not necessarily work and will not be
+ * guaranteed to work stably from release to release.
+ */
+class U_I18N_API SimpleDateFormat: public DateFormat {
+public:
+ /**
+ * Construct a SimpleDateFormat using the default pattern for the default
+ * locale.
+ * <P>
+ * [Note:] Not all locales support SimpleDateFormat; for full generality,
+ * use the factory methods in the DateFormat class.
+ * @param status Output param set to success/failure code.
+ * @stable ICU 2.0
+ */
+ SimpleDateFormat(UErrorCode& status);
+
+ /**
+ * Construct a SimpleDateFormat using the given pattern and the default locale.
+ * The locale is used to obtain the symbols used in formatting (e.g., the
+ * names of the months), but not to provide the pattern.
+ * <P>
+ * [Note:] Not all locales support SimpleDateFormat; for full generality,
+ * use the factory methods in the DateFormat class.
+ * @param pattern the pattern for the format.
+ * @param status Output param set to success/failure code.
+ * @stable ICU 2.0
+ */
+ SimpleDateFormat(const UnicodeString& pattern,
+ UErrorCode& status);
+
+ /**
+ * Construct a SimpleDateFormat using the given pattern, numbering system override, and the default locale.
+ * The locale is used to obtain the symbols used in formatting (e.g., the
+ * names of the months), but not to provide the pattern.
+ * <P>
+ * A numbering system override is a string containing either the name of a known numbering system,
+ * or a set of field and numbering system pairs that specify which fields are to be formattied with
+ * the alternate numbering system. For example, to specify that all numeric fields in the specified
+ * date or time pattern are to be rendered using Thai digits, simply specify the numbering system override
+ * as "thai". To specify that just the year portion of the date be formatted using Hebrew numbering,
+ * use the override string "y=hebrew". Numbering system overrides can be combined using a semi-colon
+ * character in the override string, such as "d=decimal;M=arabic;y=hebrew", etc.
+ *
+ * <P>
+ * [Note:] Not all locales support SimpleDateFormat; for full generality,
+ * use the factory methods in the DateFormat class.
+ * @param pattern the pattern for the format.
+ * @param override the override string.
+ * @param status Output param set to success/failure code.
+ * @stable ICU 4.2
+ */
+ SimpleDateFormat(const UnicodeString& pattern,
+ const UnicodeString& override,
+ UErrorCode& status);
+
+ /**
+ * Construct a SimpleDateFormat using the given pattern and locale.
+ * The locale is used to obtain the symbols used in formatting (e.g., the
+ * names of the months), but not to provide the pattern.
+ * <P>
+ * [Note:] Not all locales support SimpleDateFormat; for full generality,
+ * use the factory methods in the DateFormat class.
+ * @param pattern the pattern for the format.
+ * @param locale the given locale.
+ * @param status Output param set to success/failure code.
+ * @stable ICU 2.0
+ */
+ SimpleDateFormat(const UnicodeString& pattern,
+ const Locale& locale,
+ UErrorCode& status);
+
+ /**
+ * Construct a SimpleDateFormat using the given pattern, numbering system override, and locale.
+ * The locale is used to obtain the symbols used in formatting (e.g., the
+ * names of the months), but not to provide the pattern.
+ * <P>
+ * A numbering system override is a string containing either the name of a known numbering system,
+ * or a set of field and numbering system pairs that specify which fields are to be formattied with
+ * the alternate numbering system. For example, to specify that all numeric fields in the specified
+ * date or time pattern are to be rendered using Thai digits, simply specify the numbering system override
+ * as "thai". To specify that just the year portion of the date be formatted using Hebrew numbering,
+ * use the override string "y=hebrew". Numbering system overrides can be combined using a semi-colon
+ * character in the override string, such as "d=decimal;M=arabic;y=hebrew", etc.
+ * <P>
+ * [Note:] Not all locales support SimpleDateFormat; for full generality,
+ * use the factory methods in the DateFormat class.
+ * @param pattern the pattern for the format.
+ * @param override the numbering system override.
+ * @param locale the given locale.
+ * @param status Output param set to success/failure code.
+ * @stable ICU 4.2
+ */
+ SimpleDateFormat(const UnicodeString& pattern,
+ const UnicodeString& override,
+ const Locale& locale,
+ UErrorCode& status);
+
+ /**
+ * Construct a SimpleDateFormat using the given pattern and locale-specific
+ * symbol data. The formatter takes ownership of the DateFormatSymbols object;
+ * the caller is no longer responsible for deleting it.
+ * @param pattern the given pattern for the format.
+ * @param formatDataToAdopt the symbols to be adopted.
+ * @param status Output param set to success/faulure code.
+ * @stable ICU 2.0
+ */
+ SimpleDateFormat(const UnicodeString& pattern,
+ DateFormatSymbols* formatDataToAdopt,
+ UErrorCode& status);
+
+ /**
+ * Construct a SimpleDateFormat using the given pattern and locale-specific
+ * symbol data. The DateFormatSymbols object is NOT adopted; the caller
+ * remains responsible for deleting it.
+ * @param pattern the given pattern for the format.
+ * @param formatData the formatting symbols to be use.
+ * @param status Output param set to success/faulure code.
+ * @stable ICU 2.0
+ */
+ SimpleDateFormat(const UnicodeString& pattern,
+ const DateFormatSymbols& formatData,
+ UErrorCode& status);
+
+ /**
+ * Copy constructor.
+ * @stable ICU 2.0
+ */
+ SimpleDateFormat(const SimpleDateFormat&);
+
+ /**
+ * Assignment operator.
+ * @stable ICU 2.0
+ */
+ SimpleDateFormat& operator=(const SimpleDateFormat&);
+
+ /**
+ * Destructor.
+ * @stable ICU 2.0
+ */
+ virtual ~SimpleDateFormat();
+
+ /**
+ * Clone this Format object polymorphically. The caller owns the result and
+ * should delete it when done.
+ * @return A copy of the object.
+ * @stable ICU 2.0
+ */
+ virtual Format* clone(void) const;
+
+ /**
+ * Return true if the given Format objects are semantically equal. Objects
+ * of different subclasses are considered unequal.
+ * @param other the object to be compared with.
+ * @return true if the given Format objects are semantically equal.
+ * @stable ICU 2.0
+ */
+ virtual UBool operator==(const Format& other) const;
+
+
+ using DateFormat::format;
+
+ /**
+ * Format a date or time, which is the standard millis since 24:00 GMT, Jan
+ * 1, 1970. Overrides DateFormat pure virtual method.
+ * <P>
+ * Example: using the US locale: "yyyy.MM.dd e 'at' HH:mm:ss zzz" ->>
+ * 1996.07.10 AD at 15:08:56 PDT
+ *
+ * @param cal Calendar set to the date and time to be formatted
+ * into a date/time string.
+ * @param appendTo Output parameter to receive result.
+ * Result is appended to existing contents.
+ * @param pos The formatting position. On input: an alignment field,
+ * if desired. On output: the offsets of the alignment field.
+ * @return Reference to 'appendTo' parameter.
+ * @stable ICU 2.1
+ */
+ virtual UnicodeString& format( Calendar& cal,
+ UnicodeString& appendTo,
+ FieldPosition& pos) const;
+
+ /**
+ * Format a date or time, which is the standard millis since 24:00 GMT, Jan
+ * 1, 1970. Overrides DateFormat pure virtual method.
+ * <P>
+ * Example: using the US locale: "yyyy.MM.dd e 'at' HH:mm:ss zzz" ->>
+ * 1996.07.10 AD at 15:08:56 PDT
+ *
+ * @param cal Calendar set to the date and time to be formatted
+ * into a date/time string.
+ * @param appendTo Output parameter to receive result.
+ * Result is appended to existing contents.
+ * @param posIter On return, can be used to iterate over positions
+ * of fields generated by this format call. Field values
+ * are defined in UDateFormatField.
+ * @param status Input/output param set to success/failure code.
+ * @return Reference to 'appendTo' parameter.
+ * @stable ICU 4.4
+ */
+ virtual UnicodeString& format( Calendar& cal,
+ UnicodeString& appendTo,
+ FieldPositionIterator* posIter,
+ UErrorCode& status) const;
+
+ /**
+ * Format a date or time, which is the standard millis since 24:00 GMT, Jan
+ * 1, 1970. Overrides DateFormat pure virtual method.
+ * <P>
+ * Example: using the US locale: "yyyy.MM.dd e 'at' HH:mm:ss zzz" ->>
+ * 1996.07.10 AD at 15:08:56 PDT
+ *
+ * @param obj A Formattable containing the date-time value to be formatted
+ * into a date-time string. If the type of the Formattable
+ * is a numeric type, it is treated as if it were an
+ * instance of Date.
+ * @param appendTo Output parameter to receive result.
+ * Result is appended to existing contents.
+ * @param pos The formatting position. On input: an alignment field,
+ * if desired. On output: the offsets of the alignment field.
+ * @param status Input/output param set to success/failure code.
+ * @return Reference to 'appendTo' parameter.
+ * @stable ICU 2.0
+ */
+ virtual UnicodeString& format( const Formattable& obj,
+ UnicodeString& appendTo,
+ FieldPosition& pos,
+ UErrorCode& status) const;
+
+ /**
+ * Format a date or time, which is the standard millis since 24:00 GMT, Jan
+ * 1, 1970. Overrides DateFormat pure virtual method.
+ * <P>
+ * Example: using the US locale: "yyyy.MM.dd e 'at' HH:mm:ss zzz" ->>
+ * 1996.07.10 AD at 15:08:56 PDT
+ *
+ * @param obj A Formattable containing the date-time value to be formatted
+ * into a date-time string. If the type of the Formattable
+ * is a numeric type, it is treated as if it were an
+ * instance of Date.
+ * @param appendTo Output parameter to receive result.
+ * Result is appended to existing contents.
+ * @param posIter On return, can be used to iterate over positions
+ * of fields generated by this format call. Field values
+ * are defined in UDateFormatField.
+ * @param status Input/output param set to success/failure code.
+ * @return Reference to 'appendTo' parameter.
+ * @stable ICU 4.4
+ */
+ virtual UnicodeString& format( const Formattable& obj,
+ UnicodeString& appendTo,
+ FieldPositionIterator* posIter,
+ UErrorCode& status) const;
+
+ /**
+ * Redeclared DateFormat method.
+ * @param date the Date value to be formatted.
+ * @param appendTo Output parameter to receive result.
+ * Result is appended to existing contents.
+ * @param fieldPosition The formatting position. On input: an alignment field,
+ * if desired. On output: the offsets of the alignment field.
+ * @return Reference to 'appendTo' parameter.
+ * @stable ICU 2.1
+ */
+ UnicodeString& format(UDate date,
+ UnicodeString& appendTo,
+ FieldPosition& fieldPosition) const;
+
+ /**
+ * Redeclared DateFormat method.
+ * @param date the Date value to be formatted.
+ * @param appendTo Output parameter to receive result.
+ * Result is appended to existing contents.
+ * @param posIter On return, can be used to iterate over positions
+ * of fields generated by this format call. Field values
+ * are defined in UDateFormatField.
+ * @param status Input/output param set to success/failure code.
+ * @return Reference to 'appendTo' parameter.
+ * @stable ICU 4.4
+ */
+ UnicodeString& format(UDate date,
+ UnicodeString& appendTo,
+ FieldPositionIterator* posIter,
+ UErrorCode& status) const;
+
+ /**
+ * Redeclared DateFormat method.
+ * @param obj Object to be formatted.
+ * @param appendTo Output parameter to receive result.
+ * Result is appended to existing contents.
+ * @param status Input/output success/failure code.
+ * @return Reference to 'appendTo' parameter.
+ * @stable ICU 2.0
+ */
+ UnicodeString& format(const Formattable& obj,
+ UnicodeString& appendTo,
+ UErrorCode& status) const;
+
+ /**
+ * Redeclared DateFormat method.
+ * @param date Date value to be formatted.
+ * @param appendTo Output parameter to receive result.
+ * Result is appended to existing contents.
+ * @return Reference to 'appendTo' parameter.
+ * @stable ICU 2.0
+ */
+ UnicodeString& format(UDate date, UnicodeString& appendTo) const;
+
+ /**
+ * Parse a date/time string beginning at the given parse position. For
+ * example, a time text "07/10/96 4:5 PM, PDT" will be parsed into a Date
+ * that is equivalent to Date(837039928046).
+ * <P>
+ * By default, parsing is lenient: If the input is not in the form used by
+ * this object's format method but can still be parsed as a date, then the
+ * parse succeeds. Clients may insist on strict adherence to the format by
+ * calling setLenient(false).
+ *
+ * @param text The date/time string to be parsed
+ * @param cal a Calendar set to the date and time to be formatted
+ * into a date/time string.
+ * @param pos On input, the position at which to start parsing; on
+ * output, the position at which parsing terminated, or the
+ * start position if the parse failed.
+ * @return A valid UDate if the input could be parsed.
+ * @stable ICU 2.1
+ */
+ virtual void parse( const UnicodeString& text,
+ Calendar& cal,
+ ParsePosition& pos) const;
+
+ /**
+ * Parse a date/time string starting at the given parse position. For
+ * example, a time text "07/10/96 4:5 PM, PDT" will be parsed into a Date
+ * that is equivalent to Date(837039928046).
+ * <P>
+ * By default, parsing is lenient: If the input is not in the form used by
+ * this object's format method but can still be parsed as a date, then the
+ * parse succeeds. Clients may insist on strict adherence to the format by
+ * calling setLenient(false).
+ *
+ * @see DateFormat::setLenient(boolean)
+ *
+ * @param text The date/time string to be parsed
+ * @param pos On input, the position at which to start parsing; on
+ * output, the position at which parsing terminated, or the
+ * start position if the parse failed.
+ * @return A valid UDate if the input could be parsed.
+ * @stable ICU 2.0
+ */
+ UDate parse( const UnicodeString& text,
+ ParsePosition& pos) const;
+
+
+ /**
+ * Parse a date/time string. For example, a time text "07/10/96 4:5 PM, PDT"
+ * will be parsed into a UDate that is equivalent to Date(837039928046).
+ * Parsing begins at the beginning of the string and proceeds as far as
+ * possible. Assuming no parse errors were encountered, this function
+ * doesn't return any information about how much of the string was consumed
+ * by the parsing. If you need that information, use the version of
+ * parse() that takes a ParsePosition.
+ *
+ * @param text The date/time string to be parsed
+ * @param status Filled in with U_ZERO_ERROR if the parse was successful, and with
+ * an error value if there was a parse error.
+ * @return A valid UDate if the input could be parsed.
+ * @stable ICU 2.0
+ */
+ virtual UDate parse( const UnicodeString& text,
+ UErrorCode& status) const;
+
+ /**
+ * Set the start UDate used to interpret two-digit year strings.
+ * When dates are parsed having 2-digit year strings, they are placed within
+ * a assumed range of 100 years starting on the two digit start date. For
+ * example, the string "24-Jan-17" may be in the year 1817, 1917, 2017, or
+ * some other year. SimpleDateFormat chooses a year so that the resultant
+ * date is on or after the two digit start date and within 100 years of the
+ * two digit start date.
+ * <P>
+ * By default, the two digit start date is set to 80 years before the current
+ * time at which a SimpleDateFormat object is created.
+ * @param d start UDate used to interpret two-digit year strings.
+ * @param status Filled in with U_ZERO_ERROR if the parse was successful, and with
+ * an error value if there was a parse error.
+ * @stable ICU 2.0
+ */
+ virtual void set2DigitYearStart(UDate d, UErrorCode& status);
+
+ /**
+ * Get the start UDate used to interpret two-digit year strings.
+ * When dates are parsed having 2-digit year strings, they are placed within
+ * a assumed range of 100 years starting on the two digit start date. For
+ * example, the string "24-Jan-17" may be in the year 1817, 1917, 2017, or
+ * some other year. SimpleDateFormat chooses a year so that the resultant
+ * date is on or after the two digit start date and within 100 years of the
+ * two digit start date.
+ * <P>
+ * By default, the two digit start date is set to 80 years before the current
+ * time at which a SimpleDateFormat object is created.
+ * @param status Filled in with U_ZERO_ERROR if the parse was successful, and with
+ * an error value if there was a parse error.
+ * @stable ICU 2.0
+ */
+ UDate get2DigitYearStart(UErrorCode& status) const;
+
+ /**
+ * Return a pattern string describing this date format.
+ * @param result Output param to receive the pattern.
+ * @return A reference to 'result'.
+ * @stable ICU 2.0
+ */
+ virtual UnicodeString& toPattern(UnicodeString& result) const;
+
+ /**
+ * Return a localized pattern string describing this date format.
+ * In most cases, this will return the same thing as toPattern(),
+ * but a locale can specify characters to use in pattern descriptions
+ * in place of the ones described in this class's class documentation.
+ * (Presumably, letters that would be more mnemonic in that locale's
+ * language.) This function would produce a pattern using those
+ * letters.
+ *
+ * @param result Receives the localized pattern.
+ * @param status Output param set to success/failure code on
+ * exit. If the pattern is invalid, this will be
+ * set to a failure result.
+ * @return A reference to 'result'.
+ * @stable ICU 2.0
+ */
+ virtual UnicodeString& toLocalizedPattern(UnicodeString& result,
+ UErrorCode& status) const;
+
+ /**
+ * Apply the given unlocalized pattern string to this date format.
+ * (i.e., after this call, this formatter will format dates according to
+ * the new pattern)
+ *
+ * @param pattern The pattern to be applied.
+ * @stable ICU 2.0
+ */
+ virtual void applyPattern(const UnicodeString& pattern);
+
+ /**
+ * Apply the given localized pattern string to this date format.
+ * (see toLocalizedPattern() for more information on localized patterns.)
+ *
+ * @param pattern The localized pattern to be applied.
+ * @param status Output param set to success/failure code on
+ * exit. If the pattern is invalid, this will be
+ * set to a failure result.
+ * @stable ICU 2.0
+ */
+ virtual void applyLocalizedPattern(const UnicodeString& pattern,
+ UErrorCode& status);
+
+ /**
+ * Gets the date/time formatting symbols (this is an object carrying
+ * the various strings and other symbols used in formatting: e.g., month
+ * names and abbreviations, time zone names, AM/PM strings, etc.)
+ * @return a copy of the date-time formatting data associated
+ * with this date-time formatter.
+ * @stable ICU 2.0
+ */
+ virtual const DateFormatSymbols* getDateFormatSymbols(void) const;
+
+ /**
+ * Set the date/time formatting symbols. The caller no longer owns the
+ * DateFormatSymbols object and should not delete it after making this call.
+ * @param newFormatSymbols the given date-time formatting symbols to copy.
+ * @stable ICU 2.0
+ */
+ virtual void adoptDateFormatSymbols(DateFormatSymbols* newFormatSymbols);
+
+ /**
+ * Set the date/time formatting data.
+ * @param newFormatSymbols the given date-time formatting symbols to copy.
+ * @stable ICU 2.0
+ */
+ virtual void setDateFormatSymbols(const DateFormatSymbols& newFormatSymbols);
+
+ /**
+ * Return the class ID for this class. This is useful only for comparing to
+ * a return value from getDynamicClassID(). For example:
+ * <pre>
+ * . Base* polymorphic_pointer = createPolymorphicObject();
+ * . if (polymorphic_pointer->getDynamicClassID() ==
+ * . erived::getStaticClassID()) ...
+ * </pre>
+ * @return The class ID for all objects of this class.
+ * @stable ICU 2.0
+ */
+ static UClassID U_EXPORT2 getStaticClassID(void);
+
+ /**
+ * Returns a unique class ID POLYMORPHICALLY. Pure virtual override. This
+ * method is to implement a simple version of RTTI, since not all C++
+ * compilers support genuine RTTI. Polymorphic operator==() and clone()
+ * methods call this method.
+ *
+ * @return The class ID for this object. All objects of a
+ * given class have the same class ID. Objects of
+ * other classes have different class IDs.
+ * @stable ICU 2.0
+ */
+ virtual UClassID getDynamicClassID(void) const;
+
+ /**
+ * Set the calendar to be used by this date format. Initially, the default
+ * calendar for the specified or default locale is used. The caller should
+ * not delete the Calendar object after it is adopted by this call.
+ * Adopting a new calendar will change to the default symbols.
+ *
+ * @param calendarToAdopt Calendar object to be adopted.
+ * @stable ICU 2.0
+ */
+ virtual void adoptCalendar(Calendar* calendarToAdopt);
+
+ /**
+ * This is for ICU internal use only. Please do not use.
+ * Check whether the 'field' is smaller than all the fields covered in
+ * pattern, return TRUE if it is. The sequence of calendar field,
+ * from large to small is: ERA, YEAR, MONTH, DATE, AM_PM, HOUR, MINUTE,...
+ * @param field the calendar field need to check against
+ * @return TRUE if the 'field' is smaller than all the fields
+ * covered in pattern. FALSE otherwise.
+ * @internal ICU 4.0
+ */
+ UBool isFieldUnitIgnored(UCalendarDateFields field) const;
+
+
+ /**
+ * This is for ICU internal use only. Please do not use.
+ * Check whether the 'field' is smaller than all the fields covered in
+ * pattern, return TRUE if it is. The sequence of calendar field,
+ * from large to small is: ERA, YEAR, MONTH, DATE, AM_PM, HOUR, MINUTE,...
+ * @param pattern the pattern to check against
+ * @param field the calendar field need to check against
+ * @return TRUE if the 'field' is smaller than all the fields
+ * covered in pattern. FALSE otherwise.
+ * @internal ICU 4.0
+ */
+ static UBool isFieldUnitIgnored(const UnicodeString& pattern,
+ UCalendarDateFields field);
+
+
+
+ /**
+ * This is for ICU internal use only. Please do not use.
+ * Get the locale of this simple date formatter.
+ * It is used in DateIntervalFormat.
+ *
+ * @return locale in this simple date formatter
+ * @internal ICU 4.0
+ */
+ const Locale& getSmpFmtLocale(void) const;
+
+
+private:
+ friend class DateFormat;
+
+ void initializeDefaultCentury(void);
+
+ SimpleDateFormat(); // default constructor not implemented
+
+ /**
+ * Used by the DateFormat factory methods to construct a SimpleDateFormat.
+ * @param timeStyle the time style.
+ * @param dateStyle the date style.
+ * @param locale the given locale.
+ * @param status Output param set to success/failure code on
+ * exit.
+ */
+ SimpleDateFormat(EStyle timeStyle, EStyle dateStyle, const Locale& locale, UErrorCode& status);
+
+ /**
+ * Construct a SimpleDateFormat for the given locale. If no resource data
+ * is available, create an object of last resort, using hard-coded strings.
+ * This is an internal method, called by DateFormat. It should never fail.
+ * @param locale the given locale.
+ * @param status Output param set to success/failure code on
+ * exit.
+ */
+ SimpleDateFormat(const Locale& locale, UErrorCode& status); // Use default pattern
+
+ /**
+ * Hook called by format(... FieldPosition& ...) and format(...FieldPositionIterator&...)
+ */
+ UnicodeString& _format(Calendar& cal, UnicodeString& appendTo, FieldPositionHandler& handler,
+ UErrorCode& status) const;
+
+ /**
+ * Called by format() to format a single field.
+ *
+ * @param appendTo Output parameter to receive result.
+ * Result is appended to existing contents.
+ * @param ch The format character we encountered in the pattern.
+ * @param count Number of characters in the current pattern symbol (e.g.,
+ * "yyyy" in the pattern would result in a call to this function
+ * with ch equal to 'y' and count equal to 4)
+ * @param handler Records information about field positions.
+ * @param status Receives a status code, which will be U_ZERO_ERROR if the operation
+ * succeeds.
+ */
+ void subFormat(UnicodeString &appendTo,
+ UChar ch,
+ int32_t count,
+ FieldPositionHandler& handler,
+ Calendar& cal,
+ UErrorCode& status) const; // in case of illegal argument
+
+ /**
+ * Used by subFormat() to format a numeric value.
+ * Appends to toAppendTo a string representation of "value"
+ * having a number of digits between "minDigits" and
+ * "maxDigits". Uses the DateFormat's NumberFormat.
+ *
+ * @param appendTo Output parameter to receive result.
+ * Formatted number is appended to existing contents.
+ * @param value Value to format.
+ * @param minDigits Minimum number of digits the result should have
+ * @param maxDigits Maximum number of digits the result should have
+ */
+ void zeroPaddingNumber(NumberFormat *currentNumberFormat,
+ UnicodeString &appendTo,
+ int32_t value,
+ int32_t minDigits,
+ int32_t maxDigits) const;
+
+ /**
+ * Return true if the given format character, occuring count
+ * times, represents a numeric field.
+ */
+ static UBool isNumeric(UChar formatChar, int32_t count);
+
+ /**
+ * initializes fCalendar from parameters. Returns fCalendar as a convenience.
+ * @param adoptZone Zone to be adopted, or NULL for TimeZone::createDefault().
+ * @param locale Locale of the calendar
+ * @param status Error code
+ * @return the newly constructed fCalendar
+ */
+ Calendar *initializeCalendar(TimeZone* adoptZone, const Locale& locale, UErrorCode& status);
+
+ /**
+ * initializes fSymbols from parameters.
+ * @param locale Locale of the symbols
+ * @param calendar Alias to Calendar that will be used.
+ * @param status Error code
+ */
+ void initializeSymbols(const Locale& locale, Calendar* calendar, UErrorCode& status);
+
+ /**
+ * Called by several of the constructors to load pattern data and formatting symbols
+ * out of a resource bundle and initialize the locale based on it.
+ * @param timeStyle The time style, as passed to DateFormat::createDateInstance().
+ * @param dateStyle The date style, as passed to DateFormat::createTimeInstance().
+ * @param locale The locale to load the patterns from.
+ * @param status Filled in with an error code if loading the data from the
+ * resources fails.
+ */
+ void construct(EStyle timeStyle, EStyle dateStyle, const Locale& locale, UErrorCode& status);
+
+ /**
+ * Called by construct() and the various constructors to set up the SimpleDateFormat's
+ * Calendar and NumberFormat objects.
+ * @param locale The locale for which we want a Calendar and a NumberFormat.
+ * @param statuc Filled in with an error code if creating either subobject fails.
+ */
+ void initialize(const Locale& locale, UErrorCode& status);
+
+ /**
+ * Private code-size reduction function used by subParse.
+ * @param text the time text being parsed.
+ * @param start where to start parsing.
+ * @param field the date field being parsed.
+ * @param stringArray the string array to parsed.
+ * @param stringArrayCount the size of the array.
+ * @param cal a Calendar set to the date and time to be formatted
+ * into a date/time string.
+ * @return the new start position if matching succeeded; a negative number
+ * indicating matching failure, otherwise.
+ */
+ int32_t matchString(const UnicodeString& text, int32_t start, UCalendarDateFields field,
+ const UnicodeString* stringArray, int32_t stringArrayCount, Calendar& cal) const;
+
+ /**
+ * Private code-size reduction function used by subParse.
+ * @param text the time text being parsed.
+ * @param start where to start parsing.
+ * @param field the date field being parsed.
+ * @param stringArray the string array to parsed.
+ * @param stringArrayCount the size of the array.
+ * @param cal a Calendar set to the date and time to be formatted
+ * into a date/time string.
+ * @return the new start position if matching succeeded; a negative number
+ * indicating matching failure, otherwise.
+ */
+ int32_t matchQuarterString(const UnicodeString& text, int32_t start, UCalendarDateFields field,
+ const UnicodeString* stringArray, int32_t stringArrayCount, Calendar& cal) const;
+
+ /**
+ * Private member function that converts the parsed date strings into
+ * timeFields. Returns -start (for ParsePosition) if failed.
+ * @param text the time text to be parsed.
+ * @param start where to start parsing.
+ * @param ch the pattern character for the date field text to be parsed.
+ * @param count the count of a pattern character.
+ * @param obeyCount if true then the count is strictly obeyed.
+ * @param ambiguousYear If true then the two-digit year == the default start year.
+ * @param saveHebrewMonth Used to hang onto month until year is known.
+ * @param cal a Calendar set to the date and time to be formatted
+ * into a date/time string.
+ * @return the new start position if matching succeeded; a negative number
+ * indicating matching failure, otherwise.
+ */
+ int32_t subParse(const UnicodeString& text, int32_t& start, UChar ch, int32_t count,
+ UBool obeyCount, UBool allowNegative, UBool ambiguousYear[], int32_t& saveHebrewMonth, Calendar& cal,
+ int32_t patLoc) const;
+
+ void parseInt(const UnicodeString& text,
+ Formattable& number,
+ ParsePosition& pos,
+ UBool allowNegative,
+ NumberFormat *fmt) const;
+
+ void parseInt(const UnicodeString& text,
+ Formattable& number,
+ int32_t maxDigits,
+ ParsePosition& pos,
+ UBool allowNegative,
+ NumberFormat *fmt) const;
+
+ int32_t checkIntSuffix(const UnicodeString& text, int32_t start,
+ int32_t patLoc, UBool isNegative) const;
+
+ /**
+ * Translate a pattern, mapping each character in the from string to the
+ * corresponding character in the to string. Return an error if the original
+ * pattern contains an unmapped character, or if a quote is unmatched.
+ * Quoted (single quotes only) material is not translated.
+ * @param originalPattern the original pattern.
+ * @param translatedPattern Output param to receive the translited pattern.
+ * @param from the characters to be translited from.
+ * @param to the characters to be translited to.
+ * @param status Receives a status code, which will be U_ZERO_ERROR
+ * if the operation succeeds.
+ */
+ static void translatePattern(const UnicodeString& originalPattern,
+ UnicodeString& translatedPattern,
+ const UnicodeString& from,
+ const UnicodeString& to,
+ UErrorCode& status);
+
+ /**
+ * Sets the starting date of the 100-year window that dates with 2-digit years
+ * are considered to fall within.
+ * @param startDate the start date
+ * @param status Receives a status code, which will be U_ZERO_ERROR
+ * if the operation succeeds.
+ */
+ void parseAmbiguousDatesAsAfter(UDate startDate, UErrorCode& status);
+
+ /**
+ * Return the length matched by the given affix, or -1 if none.
+ * Runs of white space in the affix, match runs of white space in
+ * the input.
+ * @param affix pattern string, taken as a literal
+ * @param input input text
+ * @param pos offset into input at which to begin matching
+ * @return length of input that matches, or -1 if match failure
+ */
+ int32_t compareSimpleAffix(const UnicodeString& affix,
+ const UnicodeString& input,
+ int32_t pos) const;
+
+ /**
+ * Skip over a run of zero or more isRuleWhiteSpace() characters at
+ * pos in text.
+ */
+ int32_t skipRuleWhiteSpace(const UnicodeString& text, int32_t pos) const;
+
+ /**
+ * Skip over a run of zero or more isUWhiteSpace() characters at pos
+ * in text.
+ */
+ int32_t skipUWhiteSpace(const UnicodeString& text, int32_t pos) const;
+
+ /**
+ * Private methods for formatting/parsing GMT string
+ */
+ void appendGMT(NumberFormat *currentNumberFormat,UnicodeString &appendTo, Calendar& cal, UErrorCode& status) const;
+ void formatGMTDefault(NumberFormat *currentNumberFormat,UnicodeString &appendTo, int32_t offset) const;
+ int32_t parseGMT(const UnicodeString &text, ParsePosition &pos) const;
+ int32_t parseGMTDefault(const UnicodeString &text, ParsePosition &pos) const;
+ UBool isDefaultGMTFormat() const;
+
+ void formatRFC822TZ(UnicodeString &appendTo, int32_t offset) const;
+
+ /**
+ * Initialize MessageFormat instances used for GMT formatting/parsing
+ */
+ void initGMTFormatters(UErrorCode &status);
+
+ /**
+ * Initialize NumberFormat instances used for numbering system overrides.
+ */
+ void initNumberFormatters(const Locale &locale,UErrorCode &status);
+
+ /**
+ * Get the numbering system to be used for a particular field.
+ */
+ NumberFormat * getNumberFormatByIndex(UDateFormatField index) const;
+
+ /**
+ * Parse the given override string and set up structures for number formats
+ */
+ void processOverrideString(const Locale &locale, const UnicodeString &str, int8_t type, UErrorCode &status);
+
+ /**
+ * Used to map pattern characters to Calendar field identifiers.
+ */
+ static const UCalendarDateFields fgPatternIndexToCalendarField[];
+
+ /**
+ * Map index into pattern character string to DateFormat field number
+ */
+ static const UDateFormatField fgPatternIndexToDateFormatField[];
+
+ /**
+ * Used to map Calendar field to field level.
+ * The larger the level, the smaller the field unit.
+ * For example, UCAL_ERA level is 0, UCAL_YEAR level is 10,
+ * UCAL_MONTH level is 20.
+ */
+ static const int32_t fgCalendarFieldToLevel[];
+ static const int32_t fgPatternCharToLevel[];
+
+ /**
+ * The formatting pattern for this formatter.
+ */
+ UnicodeString fPattern;
+
+ /**
+ * The numbering system override for dates.
+ */
+ UnicodeString fDateOverride;
+
+ /**
+ * The numbering system override for times.
+ */
+ UnicodeString fTimeOverride;
+
+
+ /**
+ * The original locale used (for reloading symbols)
+ */
+ Locale fLocale;
+
+ /**
+ * A pointer to an object containing the strings to use in formatting (e.g.,
+ * month and day names, AM and PM strings, time zone names, etc.)
+ */
+ DateFormatSymbols* fSymbols; // Owned
+
+ /**
+ * If dates have ambiguous years, we map them into the century starting
+ * at defaultCenturyStart, which may be any date. If defaultCenturyStart is
+ * set to SYSTEM_DEFAULT_CENTURY, which it is by default, then the system
+ * values are used. The instance values defaultCenturyStart and
+ * defaultCenturyStartYear are only used if explicitly set by the user
+ * through the API method parseAmbiguousDatesAsAfter().
+ */
+ UDate fDefaultCenturyStart;
+
+ /**
+ * See documentation for defaultCenturyStart.
+ */
+ /*transient*/ int32_t fDefaultCenturyStartYear;
+
+ enum ParsedTZType {
+ TZTYPE_UNK,
+ TZTYPE_STD,
+ TZTYPE_DST
+ };
+
+ ParsedTZType tztype; // here to avoid api change
+
+ typedef struct NSOverride {
+ NumberFormat *nf;
+ int32_t hash;
+ NSOverride *next;
+ } NSOverride;
+
+ /*
+ * MessageFormat instances used for localized GMT format
+ */
+ enum {
+ kGMTNegativeHMS = 0,
+ kGMTNegativeHM,
+ kGMTPositiveHMS,
+ kGMTPositiveHM,
+
+ kNumGMTFormatters
+ };
+ enum {
+ kGMTNegativeHMSMinLenIdx = 0,
+ kGMTPositiveHMSMinLenIdx,
+
+ kNumGMTFormatMinLengths
+ };
+
+ MessageFormat **fGMTFormatters;
+ // If a GMT hour format has a second field, we need to make sure
+ // the length of input localized GMT string must match the expected
+ // length. Otherwise, sub DateForamt handling offset format may
+ // unexpectedly success parsing input GMT string without second field.
+ // See #6880 about this issue.
+ // TODO: SimpleDateFormat should provide an option to invalidate
+ //
+ int32_t fGMTFormatHmsMinLen[kNumGMTFormatMinLengths];
+
+ NumberFormat **fNumberFormatters;
+
+ NSOverride *fOverrideList;
+
+ UBool fHaveDefaultCentury;
+};
+
+inline UDate
+SimpleDateFormat::get2DigitYearStart(UErrorCode& /*status*/) const
+{
+ return fDefaultCenturyStart;
+}
+
+inline UnicodeString&
+SimpleDateFormat::format(const Formattable& obj,
+ UnicodeString& appendTo,
+ UErrorCode& status) const {
+ // Don't use Format:: - use immediate base class only,
+ // in case immediate base modifies behavior later.
+ return DateFormat::format(obj, appendTo, status);
+}
+
+inline UnicodeString&
+SimpleDateFormat::format(const Formattable& obj,
+ UnicodeString& appendTo,
+ FieldPosition& pos,
+ UErrorCode& status) const
+{
+ // Don't use Format:: - use immediate base class only,
+ // in case immediate base modifies behavior later.
+ return DateFormat::format(obj, appendTo, pos, status);
+}
+
+inline UnicodeString&
+SimpleDateFormat::format(const Formattable& obj,
+ UnicodeString& appendTo,
+ FieldPositionIterator* posIter,
+ UErrorCode& status) const
+{
+ // Don't use Format:: - use immediate base class only,
+ // in case immediate base modifies behavior later.
+ return DateFormat::format(obj, appendTo, posIter, status);
+}
+
+inline UnicodeString&
+SimpleDateFormat::format(UDate date,
+ UnicodeString& appendTo,
+ FieldPosition& fieldPosition) const {
+ // Don't use Format:: - use immediate base class only,
+ // in case immediate base modifies behavior later.
+ return DateFormat::format(date, appendTo, fieldPosition);
+}
+
+inline UnicodeString&
+SimpleDateFormat::format(UDate date,
+ UnicodeString& appendTo,
+ FieldPositionIterator* posIter,
+ UErrorCode& status) const {
+ // Don't use Format:: - use immediate base class only,
+ // in case immediate base modifies behavior later.
+ return DateFormat::format(date, appendTo, posIter, status);
+}
+
+inline UnicodeString&
+SimpleDateFormat::format(UDate date, UnicodeString& appendTo) const {
+ return DateFormat::format(date, appendTo);
+}
+
+U_NAMESPACE_END
+
+#endif /* #if !UCONFIG_NO_FORMATTING */
+
+#endif // _SMPDTFMT
+//eof