994 lines
40 KiB
C++
994 lines
40 KiB
C++
/*
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********************************************************************************
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* *
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* COPYRIGHT: *
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* (C) Copyright Taligent, Inc., 1997 *
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* (C) Copyright International Business Machines Corporation, 1997-1999 *
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* Licensed Material - Program-Property of IBM - All Rights Reserved. *
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* US Government Users Restricted Rights - Use, duplication, or disclosure *
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* restricted by GSA ADP Schedule Contract with IBM Corp. *
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* *
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********************************************************************************
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*
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* File CALENDAR.H
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*
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* Modification History:
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*
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* Date Name Description
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* 04/22/97 aliu Expanded and corrected comments and other header
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* contents.
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* 05/01/97 aliu Made equals(), before(), after() arguments const.
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* 05/20/97 aliu Replaced fAreFieldsSet with fAreFieldsInSync and
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* fAreAllFieldsSet.
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* 07/27/98 stephen Sync up with JDK 1.2
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********************************************************************************
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*/
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#ifndef CALENDAR_H
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#define CALENDAR_H
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#include "locid.h"
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#include "timezone.h"
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/**
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* <code>Calendar</code> is an abstract base class for converting between
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* a <code>UDate</code> object and a set of integer fields such as
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* <code>YEAR</code>, <code>MONTH</code>, <code>DAY</code>, <code>HOUR</code>,
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* and so on. (A <code>UDate</code> object represents a specific instant in
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* time with millisecond precision. See
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* {@link UDate}
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* for information about the <code>UDate</code> class.)
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*
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* <p>
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* Subclasses of <code>Calendar</code> interpret a <code>UDate</code>
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* according to the rules of a specific calendar system. The JDK
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* provides one concrete subclass of <code>Calendar</code>:
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* <code>GregorianCalendar</code>. Future subclasses could represent
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* the various types of lunar calendars in use in many parts of the world.
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*
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* <p>
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* Like other locale-sensitive classes, <code>Calendar</code> provides a
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* class method, <code>getInstance</code>, for getting a generally useful
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* object of this type. <code>Calendar</code>'s <code>getInstance</code> method
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* returns a <code>GregorianCalendar</code> object whose
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* time fields have been initialized with the current date and time:
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* <blockquote>
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* <pre>
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* Calendar rightNow = Calendar.getInstance();
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* </pre>
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* </blockquote>
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*
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* <p>
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* A <code>Calendar</code> object can produce all the time field values
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* needed to implement the date-time formatting for a particular language
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* and calendar style (for example, Japanese-Gregorian, Japanese-Traditional).
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*
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* <p>
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* When computing a <code>UDate</code> from time fields, two special circumstances
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* may arise: there may be insufficient information to compute the
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* <code>UDate</code> (such as only year and month but no day in the month),
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* or there may be inconsistent information (such as "Tuesday, July 15, 1996"
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* -- July 15, 1996 is actually a Monday).
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*
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* <p>
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* <strong>Insufficient information.</strong> The calendar will use default
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* information to specify the missing fields. This may vary by calendar; for
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* the Gregorian calendar, the default for a field is the same as that of the
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* start of the epoch: i.e., YEAR = 1970, MONTH = JANUARY, DATE = 1, etc.
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*
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* <p>
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* <strong>Inconsistent information.</strong> If fields conflict, the calendar
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* will give preference to fields set more recently. For example, when
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* determining the day, the calendar will look for one of the following
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* combinations of fields. The most recent combination, as determined by the
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* most recently set single field, will be used.
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*
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* <blockquote>
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* <pre>
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* MONTH + DAY_OF_MONTH
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* MONTH + WEEK_OF_MONTH + DAY_OF_WEEK
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* MONTH + DAY_OF_WEEK_IN_MONTH + DAY_OF_WEEK
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* DAY_OF_YEAR
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* DAY_OF_WEEK + WEEK_OF_YEAR
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* </pre>
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* </blockquote>
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*
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* For the time of day:
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*
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* <blockquote>
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* <pre>
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* HOUR_OF_DAY
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* AM_PM + HOUR
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* </pre>
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* </blockquote>
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*
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* <p>
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* <strong>Note:</strong> for some non-Gregorian calendars, different
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* fields may be necessary for complete disambiguation. For example, a full
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* specification of the historial Arabic astronomical calendar requires year,
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* month, day-of-month <em>and</em> day-of-week in some cases.
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*
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* <p>
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* <strong>Note:</strong> There are certain possible ambiguities in
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* interpretation of certain singular times, which are resolved in the
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* following ways:
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* <ol>
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* <li> 24:00:00 "belongs" to the following day. That is,
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* 23:59 on Dec 31, 1969 < 24:00 on Jan 1, 1970 < 24:01:00 on Jan 1, 1970
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*
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* <li> Although historically not precise, midnight also belongs to "am",
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* and noon belongs to "pm", so on the same day,
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* 12:00 am (midnight) < 12:01 am, and 12:00 pm (noon) < 12:01 pm
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* </ol>
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*
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* <p>
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* The date or time format strings are not part of the definition of a
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* calendar, as those must be modifiable or overridable by the user at
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* runtime. Use {@link DateFormat}
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* to format dates.
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*
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* <p>
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* <code>Calendar</code> provides an API for field "rolling", where fields
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* can be incremented or decremented, but wrap around. For example, rolling the
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* month up in the date <code>December 12, <b>1996</b></code> results in
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* <code>January 12, <b>1996</b></code>.
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*
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* <p>
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* <code>Calendar</code> also provides a date arithmetic function for
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* adding the specified (signed) amount of time to a particular time field.
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* For example, subtracting 5 days from the date <code>September 12, 1996</code>
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* results in <code>September 7, 1996</code>.
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*
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*/
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class U_I18N_API Calendar {
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public:
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/**
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* Field IDs for date and time. Used to specify date/time fields. ERA is calendar
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* specific. Example ranges given are for illustration only; see specific Calendar
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* subclasses for actual ranges.
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*/
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enum EDateFields {
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ERA, // Example: 0..1
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YEAR, // Example: 1..big number
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MONTH, // Example: 0..11
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WEEK_OF_YEAR, // Example: 1..53
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WEEK_OF_MONTH, // Example: 1..4
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DATE, // Example: 1..31
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DAY_OF_YEAR, // Example: 1..365
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DAY_OF_WEEK, // Example: 1..7
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DAY_OF_WEEK_IN_MONTH, // Example: 1..4, may be specified as -1
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AM_PM, // Example: 0..1
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HOUR, // Example: 0..11
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HOUR_OF_DAY, // Example: 0..23
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MINUTE, // Example: 0..59
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SECOND, // Example: 0..59
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MILLISECOND, // Example: 0..999
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ZONE_OFFSET, // Example: -12*U_MILLIS_PER_HOUR..12*U_MILLIS_PER_HOUR
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DST_OFFSET, // Example: 0 or U_MILLIS_PER_HOUR
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FIELD_COUNT,
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DAY_OF_MONTH = DATE // Synonyms
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};
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/**
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* Useful constant for days of week. Note: Calendar day-of-week is 1-based. Clients
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* who create locale resources for the field of first-day-of-week should be aware of
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* this. For instance, in US locale, first-day-of-week is set to 1, i.e., SUNDAY.
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*/
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enum EDaysOfWeek {
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SUNDAY = 1,
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MONDAY,
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TUESDAY,
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WEDNESDAY,
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THURSDAY,
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FRIDAY,
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SATURDAY
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};
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/**
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* Useful constants for month. Note: Calendar month is 0-based.
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*/
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enum EMonths {
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JANUARY,
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FEBRUARY,
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MARCH,
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APRIL,
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MAY,
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JUNE,
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JULY,
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AUGUST,
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SEPTEMBER,
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OCTOBER,
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NOVEMBER,
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DECEMBER,
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UNDECIMBER
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};
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/**
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* Useful constants for hour in 12-hour clock. Used in GregorianCalendar.
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*/
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enum EAmpm {
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AM,
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PM
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};
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/**
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* destructor
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*/
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virtual ~Calendar();
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/**
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* Create and return a polymorphic copy of this calendar.
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*/
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virtual Calendar* clone(void) const = 0;
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/**
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* Creates a Calendar using the default timezone and locale. Clients are responsible
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* for deleting the object returned.
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*
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* @param success Indicates the success/failure of Calendar creation. Filled in
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* with U_ZERO_ERROR if created successfully, set to a failure result
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* otherwise.
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* @return A Calendar if created successfully. NULL otherwise.
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*/
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static Calendar* createInstance(UErrorCode& success);
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/**
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* Creates a Calendar using the given timezone and the default locale.
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* The Calendar takes ownership of zoneToAdopt; the
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* client must not delete it.
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*
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* @param zoneToAdopt The given timezone to be adopted.
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* @param success Indicates the success/failure of Calendar creation. Filled in
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* with U_ZERO_ERROR if created successfully, set to a failure result
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* otherwise.
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* @return A Calendar if created successfully. NULL otherwise.
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*/
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static Calendar* createInstance(TimeZone* zoneToAdopt, UErrorCode& success);
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/**
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* Creates a Calendar using the given timezone and the default locale. The TimeZone
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* is _not_ adopted; the client is still responsible for deleting it.
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*
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* @param zone The timezone.
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* @param success Indicates the success/failure of Calendar creation. Filled in
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* with U_ZERO_ERROR if created successfully, set to a failure result
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* otherwise.
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* @return A Calendar if created successfully. NULL otherwise.
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*/
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static Calendar* createInstance(const TimeZone& zone, UErrorCode& success);
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/**
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* Creates a Calendar using the default timezone and the given locale.
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*
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* @param aLocale The given locale.
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* @param success Indicates the success/failure of Calendar creation. Filled in
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* with U_ZERO_ERROR if created successfully, set to a failure result
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* otherwise.
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* @return A Calendar if created successfully. NULL otherwise.
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*/
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static Calendar* createInstance(const Locale& aLocale, UErrorCode& success);
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/**
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* Creates a Calendar using the given timezone and given locale.
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* The Calendar takes ownership of zoneToAdopt; the
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* client must not delete it.
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*
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* @param zoneToAdopt The given timezone to be adopted.
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* @param aLocale The given locale.
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* @param success Indicates the success/failure of Calendar creation. Filled in
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* with U_ZERO_ERROR if created successfully, set to a failure result
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* otherwise.
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* @return A Calendar if created successfully. NULL otherwise.
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*/
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static Calendar* createInstance(TimeZone* zoneToAdopt, const Locale& aLocale, UErrorCode& success);
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/**
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* Gets a Calendar using the given timezone and given locale. The TimeZone
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* is _not_ adopted; the client is still responsible for deleting it.
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*
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* @param zone The timezone.
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* @param aLocale The given locale.
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* @param success Indicates the success/failure of Calendar creation. Filled in
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* with U_ZERO_ERROR if created successfully, set to a failure result
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* otherwise.
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* @return A Calendar if created successfully. NULL otherwise.
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*/
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static Calendar* createInstance(const TimeZone& zoneToAdopt, const Locale& aLocale, UErrorCode& success);
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/**
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* Returns a list of the locales for which Calendars are installed.
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*
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* @param count Number of locales returned.
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* @return An array of Locale objects representing the set of locales for which
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* Calendars are installed. The system retains ownership of this list;
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* the caller must NOT delete it.
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*/
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static const Locale* getAvailableLocales(int32_t& count);
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/**
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* Returns the current UTC (GMT) time measured in milliseconds since 0:00:00 on 1/1/70
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* (derived from the system time).
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*
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* @return The current UTC time in milliseconds.
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*/
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static UDate getNow(void);
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/**
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* Gets this Calendar's time as milliseconds. May involve recalculation of time due
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* to previous calls to set time field values. The time specified is non-local UTC
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* (GMT) time. Although this method is const, this object may actually be changed
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* (semantically const).
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*
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* @param status Output param set to success/failure code on exit. If any value
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* previously set in the time field is invalid or restricted by
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* leniency, this will be set to an error status.
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* @return The current time in UTC (GMT) time, or zero if the operation
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* failed.
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*/
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inline UDate getTime(UErrorCode& status) const { return getTimeInMillis(status); }
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/**
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* Sets this Calendar's current time with the given UDate. The time specified should
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* be in non-local UTC (GMT) time.
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*
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* @param date The given UDate in UTC (GMT) time.
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*/
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inline void setTime(UDate date, UErrorCode& status) { setTimeInMillis(date, status); }
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/**
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* Compares the equality of two Calendar objects. Objects of different subclasses
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* are considered unequal. This comparison is very exacting; two Calendar objects
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* must be in exactly the same state to be considered equal. To compare based on the
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* represented time, use equals() instead.
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*
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* @param that The Calendar object to be compared with.
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* @return True if the given Calendar is the same as this Calendar; false
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* otherwise.
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*/
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virtual bool_t operator==(const Calendar& that) const;
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/**
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* Compares the inequality of two Calendar objects.
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*
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* @param that The Calendar object to be compared with.
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* @return True if the given Calendar is not the same as this Calendar; false
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* otherwise.
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*/
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bool_t operator!=(const Calendar& that) const {return !operator==(that);}
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/**
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* Compares the Calendar time, whereas Calendar::operator== compares the equality of
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* Calendar objects.
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*
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* @param when The Calendar to be compared with this Calendar. Although this is a
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* const parameter, the object may be modified physically
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* (semantically const).
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* @param status Output param set to success/failure code on exit. If any value
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* previously set in the time field is invalid or restricted by
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* leniency, this will be set to an error status.
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* @return True if the current time of this Calendar is equal to the time of
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* Calendar when; false otherwise.
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*/
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bool_t equals(const Calendar& when, UErrorCode& status) const;
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/**
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* Returns true if this Calendar's current time is before "when"'s current time.
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*
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* @param when The Calendar to be compared with this Calendar. Although this is a
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* const parameter, the object may be modified physically
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* (semantically const).
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* @param status Output param set to success/failure code on exit. If any value
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* previously set in the time field is invalid or restricted by
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* leniency, this will be set to an error status.
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* @return True if the current time of this Calendar is before the time of
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* Calendar when; false otherwise.
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*/
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bool_t before(const Calendar& when, UErrorCode& status) const;
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/**
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* Returns true if this Calendar's current time is after "when"'s current time.
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*
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* @param when The Calendar to be compared with this Calendar. Although this is a
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* const parameter, the object may be modified physically
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* (semantically const).
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* @param status Output param set to success/failure code on exit. If any value
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* previously set in the time field is invalid or restricted by
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* leniency, this will be set to an error status.
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* @return True if the current time of this Calendar is after the time of
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* Calendar when; false otherwise.
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*/
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bool_t after(const Calendar& when, UErrorCode& status) const;
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/**
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* Return true if another Calendar object is equivalent to this one. An equivalent
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* Calendar will behave exactly as this one does, but may be set to a different time.
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*/
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// {sfb} not in Java API!
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virtual bool_t equivalentTo(const Calendar& other) const;
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/**
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* UDate Arithmetic function. Adds the specified (signed) amount of time to the given
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* time field, based on the calendar's rules. For example, to subtract 5 days from
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* the current time of the calendar, call add(Calendar::DATE, -5). When adding on
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* the month or Calendar::MONTH field, other fields like date might conflict and
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* need to be changed. For instance, adding 1 month on the date 01/31/96 will result
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* in 02/29/96.
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*
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* @param field Specifies which date field to modify.
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* @param amount The amount of time to be added to the field, in the natural unit
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* for that field (e.g., days for the day fields, hours for the hour
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* field.)
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* @param status Output param set to success/failure code on exit. If any value
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* previously set in the time field is invalid or restricted by
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* leniency, this will be set to an error status.
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*/
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virtual void add(EDateFields field, int32_t amount, UErrorCode& status) = 0;
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/**
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* Time Field Rolling function. Rolls (up/down) a single unit of time on the given
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* time field. For example, to roll the current date up by one day, call
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* roll(Calendar::DATE, true). When rolling on the year or Calendar::YEAR field, it
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* will roll the year value in the range between getMinimum(Calendar::YEAR) and the
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* value returned by getMaximum(Calendar::YEAR). When rolling on the month or
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* Calendar::MONTH field, other fields like date might conflict and, need to be
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* changed. For instance, rolling the month up on the date 01/31/96 will result in
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* 02/29/96. Rolling up always means rolling forward in time; e.g., rolling the year
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* up on "100 BC" will result in "99 BC", for Gregorian calendar. When rolling on the
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* hour-in-day or Calendar::HOUR_OF_DAY field, it will roll the hour value in the range
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* between 0 and 23, which is zero-based.
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* <P>
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* NOTE: Do not use this method -- use roll(EDateFields, int, UErrorCode&) instead.
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*
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* @param field The time field.
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* @param up Indicates if the value of the specified time field is to be rolled
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* up or rolled down. Use true if rolling up, false otherwise.
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* @param status Output param set to success/failure code on exit. If any value
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* previously set in the time field is invalid or restricted by
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* leniency, this will be set to an error status.
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*/
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// {sfb} this doesn't seem to match the Java version
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void roll(EDateFields field, bool_t up, UErrorCode& status);
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/**
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* Time Field Rolling function. Rolls by the given amount on the given
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* time field. For example, to roll the current date up by one day, call
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* roll(Calendar::DATE, +1, status). When rolling on the month or
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* Calendar::MONTH field, other fields like date might conflict and, need to be
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* changed. For instance, rolling the month up on the date 01/31/96 will result in
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* 02/29/96. Rolling by a positive value always means rolling forward in time;
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* e.g., rolling the year by +1 on "100 BC" will result in "99 BC", for Gregorian
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* calendar. When rolling on the hour-in-day or Calendar::HOUR_OF_DAY field, it will
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* roll the hour value in the range between 0 and 23, which is zero-based.
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* <P>
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* The only difference between roll() and add() is that roll() does not change
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* the value of more significant fields when it reaches the minimum or maximum
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* of its range, whereas add() does.
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*
|
|
* @param field The time field.
|
|
* @param amount Indicates amount to roll.
|
|
* @param status Output param set to success/failure code on exit. If any value
|
|
* previously set in the time field is invalid, this will be set to
|
|
* an error status.
|
|
*/
|
|
// {sfb} this doesn't match Java- but it has to be this way to assure backwards compatibility
|
|
virtual void roll(EDateFields field, int32_t amount, UErrorCode& status) = 0;
|
|
|
|
/**
|
|
* Sets the calendar's time zone to be the one passed in. The Calendar takes ownership
|
|
* of the TimeZone; the caller is no longer responsible for deleting it. If the
|
|
* given time zone is NULL, this function has no effect.
|
|
*
|
|
* @param value The given time zone.
|
|
*/
|
|
void adoptTimeZone(TimeZone* value);
|
|
|
|
/**
|
|
* Sets the calendar's time zone to be the same as the one passed in. The TimeZone
|
|
* passed in is _not_ adopted; the client is still responsible for deleting it.
|
|
*
|
|
* @param value The given time zone.
|
|
*/
|
|
void setTimeZone(const TimeZone& zone);
|
|
|
|
/**
|
|
* Returns a reference to the time zone owned by this calendar. The returned reference
|
|
* is only valid until clients make another call to adoptTimeZone or setTimeZone,
|
|
* or this Calendar is destroyed.
|
|
*
|
|
* @return The time zone object associated with this calendar.
|
|
*/
|
|
const TimeZone& getTimeZone(void) const;
|
|
|
|
/**
|
|
* Returns the time zone owned by this calendar. The caller owns the returned object
|
|
* and must delete it when done. After this call, the new time zone associated
|
|
* with this Calendar is the default TimeZone as returned by TimeZone::createDefault().
|
|
*
|
|
* @return The time zone object which was associated with this calendar.
|
|
*/
|
|
TimeZone* orphanTimeZone(void);
|
|
|
|
/**
|
|
* Queries if the current date for this Calendar is in Daylight Savings Time.
|
|
*
|
|
* @param status Fill-in parameter which receives the status of this operation.
|
|
* @return True if the current date for this Calendar is in Daylight Savings Time,
|
|
* false, otherwise.
|
|
*/
|
|
// {sfb} API change?
|
|
virtual bool_t inDaylightTime(UErrorCode& status) const = 0;
|
|
|
|
/**
|
|
* Specifies whether or not date/time interpretation is to be lenient. With lenient
|
|
* interpretation, a date such as "February 942, 1996" will be treated as being
|
|
* equivalent to the 941st day after February 1, 1996. With strict interpretation,
|
|
* such dates will cause an error when computing time from the time field values
|
|
* representing the dates.
|
|
*
|
|
* @param lenient True specifies date/time interpretation to be lenient.
|
|
*
|
|
* @see DateFormat#setLenient
|
|
*/
|
|
void setLenient(bool_t lenient);
|
|
|
|
/**
|
|
* Tells whether date/time interpretation is to be lenient.
|
|
*
|
|
* @return True tells that date/time interpretation is to be lenient.
|
|
*/
|
|
bool_t isLenient(void) const;
|
|
|
|
/**
|
|
* Sets what the first day of the week is; e.g., Sunday in US, Monday in France.
|
|
*
|
|
* @param value The given first day of the week.
|
|
*/
|
|
void setFirstDayOfWeek(EDaysOfWeek value);
|
|
|
|
/**
|
|
* Gets what the first day of the week is; e.g., Sunday in US, Monday in France.
|
|
*
|
|
* @return The first day of the week.
|
|
*/
|
|
EDaysOfWeek getFirstDayOfWeek(void) const;
|
|
|
|
/**
|
|
* Sets what the minimal days required in the first week of the year are; For
|
|
* example, if the first week is defined as one that contains the first day of the
|
|
* first month of a year, call the method with value 1. If it must be a full week,
|
|
* use value 7.
|
|
*
|
|
* @param value The given minimal days required in the first week of the year.
|
|
*/
|
|
void setMinimalDaysInFirstWeek(uint8_t value);
|
|
|
|
/**
|
|
* Gets what the minimal days required in the first week of the year are; e.g., if
|
|
* the first week is defined as one that contains the first day of the first month
|
|
* of a year, getMinimalDaysInFirstWeek returns 1. If the minimal days required must
|
|
* be a full week, getMinimalDaysInFirstWeek returns 7.
|
|
*
|
|
* @return The minimal days required in the first week of the year.
|
|
*/
|
|
uint8_t getMinimalDaysInFirstWeek(void) const;
|
|
|
|
/**
|
|
* Gets the minimum value for the given time field. e.g., for Gregorian
|
|
* DAY_OF_MONTH, 1.
|
|
*
|
|
* @param field The given time field.
|
|
* @return The minimum value for the given time field.
|
|
*/
|
|
virtual int32_t getMinimum(EDateFields field) const = 0;
|
|
|
|
/**
|
|
* Gets the maximum value for the given time field. e.g. for Gregorian DAY_OF_MONTH,
|
|
* 31.
|
|
*
|
|
* @param field The given time field.
|
|
* @return The maximum value for the given time field.
|
|
*/
|
|
virtual int32_t getMaximum(EDateFields field) const = 0;
|
|
|
|
/**
|
|
* Gets the highest minimum value for the given field if varies. Otherwise same as
|
|
* getMinimum(). For Gregorian, no difference.
|
|
*
|
|
* @param field The given time field.
|
|
* @return The highest minimum value for the given time field.
|
|
*/
|
|
virtual int32_t getGreatestMinimum(EDateFields field) const = 0;
|
|
|
|
/**
|
|
* Gets the lowest maximum value for the given field if varies. Otherwise same as
|
|
* getMaximum(). e.g., for Gregorian DAY_OF_MONTH, 28.
|
|
*
|
|
* @param field The given time field.
|
|
* @return The lowest maximum value for the given time field.
|
|
*/
|
|
virtual int32_t getLeastMaximum(EDateFields field) const = 0;
|
|
|
|
/**
|
|
* Return the minimum value that this field could have, given the current date.
|
|
* For the Gregorian calendar, this is the same as getMinimum() and getGreatestMinimum().
|
|
*
|
|
* The version of this function on Calendar uses an iterative algorithm to determine the
|
|
* actual minimum value for the field. There is almost always a more efficient way to
|
|
* accomplish this (in most cases, you can simply return getMinimum()). GregorianCalendar
|
|
* overrides this function with a more efficient implementation.
|
|
*
|
|
* @param field the field to determine the minimum of
|
|
* @return the minimum of the given field for the current date of this Calendar
|
|
*/
|
|
int32_t getActualMinimum(EDateFields field, UErrorCode& status) const;
|
|
|
|
/**
|
|
* Return the maximum value that this field could have, given the current date.
|
|
* For example, with the date "Feb 3, 1997" and the DAY_OF_MONTH field, the actual
|
|
* maximum would be 28; for "Feb 3, 1996" it s 29. Similarly for a Hebrew calendar,
|
|
* for some years the actual maximum for MONTH is 12, and for others 13.
|
|
*
|
|
* The version of this function on Calendar uses an iterative algorithm to determine the
|
|
* actual maximum value for the field. There is almost always a more efficient way to
|
|
* accomplish this (in most cases, you can simply return getMaximum()). GregorianCalendar
|
|
* overrides this function with a more efficient implementation.
|
|
*
|
|
* @param field the field to determine the maximum of
|
|
* @return the maximum of the given field for the current date of this Calendar
|
|
*/
|
|
int32_t getActualMaximum(EDateFields field, UErrorCode& status) const;
|
|
|
|
/**
|
|
* Gets the value for a given time field. Recalculate the current time field values
|
|
* if the time value has been changed by a call to setTime(). Return zero for unset
|
|
* fields if any fields have been explicitly set by a call to set(). To force a
|
|
* recomputation of all fields regardless of the previous state, call complete().
|
|
* This method is semantically const, but may alter the object in memory.
|
|
*
|
|
* @param field The given time field.
|
|
* @param status Fill-in parameter which receives the status of the operation.
|
|
* @return The value for the given time field, or zero if the field is unset,
|
|
* and set() has been called for any other field.
|
|
*/
|
|
int32_t get(EDateFields field, UErrorCode& status) const;
|
|
|
|
/**
|
|
* Determines if the given time field has a value set. This can affect in the
|
|
* resolving of time in Calendar. Unset fields have a value of zero, by definition.
|
|
*
|
|
* @return True if the given time field has a value set; false otherwise.
|
|
*/
|
|
bool_t isSet(EDateFields field) const;
|
|
|
|
/**
|
|
* Sets the given time field with the given value.
|
|
*
|
|
* @param field The given time field.
|
|
* @param value The value to be set for the given time field.
|
|
*/
|
|
void set(EDateFields field, int32_t value);
|
|
|
|
/**
|
|
* Sets the values for the fields YEAR, MONTH, and DATE. Other field values are
|
|
* retained; call clear() first if this is not desired.
|
|
*
|
|
* @param year The value used to set the YEAR time field.
|
|
* @param month The value used to set the MONTH time field. Month value is 0-based.
|
|
* e.g., 0 for January.
|
|
* @param date The value used to set the DATE time field.
|
|
*/
|
|
void set(int32_t year, int32_t month, int32_t date);
|
|
|
|
/**
|
|
* Sets the values for the fields YEAR, MONTH, DATE, HOUR_OF_DAY, and MINUTE. Other
|
|
* field values are retained; call clear() first if this is not desired.
|
|
*
|
|
* @param year The value used to set the YEAR time field.
|
|
* @param month The value used to set the MONTH time field. Month value is
|
|
* 0-based. E.g., 0 for January.
|
|
* @param date The value used to set the DATE time field.
|
|
* @param hour The value used to set the HOUR_OF_DAY time field.
|
|
* @param minute The value used to set the MINUTE time field.
|
|
*/
|
|
void set(int32_t year, int32_t month, int32_t date, int32_t hour, int32_t minute);
|
|
|
|
/**
|
|
* Sets the values for the fields YEAR, MONTH, DATE, HOUR_OF_DAY, MINUTE, and SECOND.
|
|
* Other field values are retained; call clear() first if this is not desired.
|
|
*
|
|
* @param year The value used to set the YEAR time field.
|
|
* @param month The value used to set the MONTH time field. Month value is
|
|
* 0-based. E.g., 0 for January.
|
|
* @param date The value used to set the DATE time field.
|
|
* @param hour The value used to set the HOUR_OF_DAY time field.
|
|
* @param minute The value used to set the MINUTE time field.
|
|
* @param second The value used to set the SECOND time field.
|
|
*/
|
|
void set(int32_t year, int32_t month, int32_t date, int32_t hour, int32_t minute, int32_t second);
|
|
|
|
/**
|
|
* Clears the values of all the time fields, making them both unset and assigning
|
|
* them a value of zero. The field values will be determined during the next
|
|
* resolving of time into time fields.
|
|
*/
|
|
void clear(void);
|
|
|
|
/**
|
|
* Clears the value in the given time field, both making it unset and assigning it a
|
|
* value of zero. This field value will be determined during the next resolving of
|
|
* time into time fields.
|
|
*
|
|
* @param field The time field to be cleared.
|
|
*/
|
|
void clear(EDateFields field);
|
|
|
|
/**
|
|
* Returns a unique class ID POLYMORPHICALLY. Pure virtual method. 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.
|
|
* <P>
|
|
* Concrete subclasses of Calendar must implement getDynamicClassID() and also a
|
|
* static method and data member:
|
|
*
|
|
* static UClassID getStaticClassID() { return (UClassID)&fgClassID; }
|
|
* static char fgClassID;
|
|
*
|
|
* @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.
|
|
*/
|
|
virtual UClassID getDynamicClassID(void) const = 0;
|
|
|
|
protected:
|
|
|
|
/**
|
|
* Constructs a Calendar with the default time zone as returned by
|
|
* TimeZone::createInstance(), and the default locale.
|
|
*
|
|
* @param success Indicates the status of Calendar object construction. Returns
|
|
* U_ZERO_ERROR if constructed successfully.
|
|
*/
|
|
Calendar(UErrorCode& success);
|
|
|
|
/**
|
|
* Copy constructor
|
|
*/
|
|
Calendar(const Calendar& source);
|
|
|
|
/**
|
|
* Default assignment operator
|
|
*/
|
|
Calendar& operator=(const Calendar& right);
|
|
|
|
/**
|
|
* Constructs a Calendar with the given time zone and locale. Clients are no longer
|
|
* responsible for deleting the given time zone object after it's adopted.
|
|
*
|
|
* @param zoneToAdopt The given time zone.
|
|
* @param aLocale The given locale.
|
|
* @param success Indicates the status of Calendar object construction. Returns
|
|
* U_ZERO_ERROR if constructed successfully.
|
|
*/
|
|
Calendar(TimeZone* zone, const Locale& aLocale, UErrorCode& success);
|
|
|
|
/**
|
|
* Constructs a Calendar with the given time zone and locale.
|
|
*
|
|
* @param zone The given time zone.
|
|
* @param aLocale The given locale.
|
|
* @param success Indicates the status of Calendar object construction. Returns
|
|
* U_ZERO_ERROR if constructed successfully.
|
|
*/
|
|
Calendar(const TimeZone& zone, const Locale& aLocale, UErrorCode& success);
|
|
|
|
/**
|
|
* Converts Calendar's time field values to GMT as milliseconds.
|
|
*
|
|
* @param status Output param set to success/failure code on exit. If any value
|
|
* previously set in the time field is invalid or restricted by
|
|
* leniency, this will be set to an error status.
|
|
*/
|
|
virtual void computeTime(UErrorCode& status) = 0;
|
|
|
|
/**
|
|
* Converts GMT as milliseconds to time field values. This allows you to sync up the
|
|
* time field values with a new time that is set for the calendar. This method
|
|
* does NOT recompute the time first; to recompute the time, then the fields, use
|
|
* the method complete().
|
|
*/
|
|
virtual void computeFields(UErrorCode& status) = 0;
|
|
|
|
// {sfb} this uses a long in Java
|
|
/**
|
|
* Gets this Calendar's current time as a long.
|
|
* @return the current time as UTC milliseconds from the epoch.
|
|
*/
|
|
double getTimeInMillis(UErrorCode& status) const;
|
|
|
|
/**
|
|
* Sets this Calendar's current time from the given long value.
|
|
* @param date the new time in UTC milliseconds from the epoch.
|
|
*/
|
|
void setTimeInMillis( double millis, UErrorCode& status );
|
|
|
|
/**
|
|
* Recomputes the current time from currently set fields, and then fills in any
|
|
* unset fields in the time field list.
|
|
*
|
|
* @param status Output param set to success/failure code on exit. If any value
|
|
* previously set in the time field is invalid or restricted by
|
|
* leniency, this will be set to an error status.
|
|
*/
|
|
void complete(UErrorCode& status);
|
|
|
|
/**
|
|
* Gets the value for a given time field. Subclasses can use this function to get
|
|
* field values without forcing recomputation of time.
|
|
*
|
|
* @param field The given time field.
|
|
* @return The value for the given time field.
|
|
*/
|
|
int32_t internalGet(EDateFields field) const {return fFields[field];}
|
|
|
|
/**
|
|
* Sets the value for a given time field. This is a fast internal method for
|
|
* subclasses. It does not affect the areFieldsInSync, isTimeSet, or areAllFieldsSet
|
|
* flags.
|
|
*/
|
|
void internalSet(EDateFields field, int32_t value);
|
|
|
|
protected:
|
|
/**
|
|
* The flag which indicates if the current time is set in the calendar.
|
|
*/
|
|
bool_t fIsTimeSet;
|
|
|
|
/**
|
|
* True if the fields are in sync with the currently set time of this Calendar.
|
|
* If false, then the next attempt to get the value of a field will
|
|
* force a recomputation of all fields from the current value of the time
|
|
* field.
|
|
* <P>
|
|
* This should really be named areFieldsInSync, but the old name is retained
|
|
* for backward compatibility.
|
|
*/
|
|
bool_t fAreFieldsSet;
|
|
|
|
/**
|
|
* True if all of the fields have been set. This is initially false, and set to
|
|
* true by computeFields().
|
|
*/
|
|
bool_t fAreAllFieldsSet;
|
|
|
|
/**
|
|
* Get the current time without recomputing.
|
|
*/
|
|
UDate internalGetTime(void) const { return fTime; }
|
|
|
|
/**
|
|
* Set the current time without affecting flags or fields.
|
|
*/
|
|
void internalSetTime(UDate time) { fTime = time; }
|
|
|
|
/**
|
|
* The time fields containing values into which the millis is computed.
|
|
*/
|
|
int32_t fFields[FIELD_COUNT];
|
|
|
|
/**
|
|
* The flags which tell if a specified time field for the calendar is set.
|
|
*/
|
|
bool_t fIsSet[FIELD_COUNT];
|
|
|
|
// Special values of stamp[]
|
|
enum EStampValues {
|
|
kUnset = 0,
|
|
kInternallySet,
|
|
kMinimumUserStamp
|
|
};
|
|
|
|
/**
|
|
* Pseudo-time-stamps which specify when each field was set. There
|
|
* are two special values, UNSET and INTERNALLY_SET. Values from
|
|
* MINIMUM_USER_SET to Integer.MAX_VALUE are legal user set values.
|
|
*/
|
|
int32_t fStamp[FIELD_COUNT];
|
|
|
|
private:
|
|
|
|
// The next available value for stampp[]
|
|
int32_t fNextStamp;// = MINIMUM_USER_STAMP;
|
|
|
|
/**
|
|
* The current time set for the calendar.
|
|
*/
|
|
UDate fTime;
|
|
|
|
/**
|
|
* @see #setLenient
|
|
*/
|
|
bool_t fLenient;
|
|
|
|
/**
|
|
* Time zone affects the time calculation done by Calendar. Calendar subclasses use
|
|
* the time zone data to produce the local time.
|
|
*/
|
|
TimeZone* fZone;
|
|
|
|
/**
|
|
* Both firstDayOfWeek and minimalDaysInFirstWeek are locale-dependent. They are
|
|
* used to figure out the week count for a specific date for a given locale. These
|
|
* must be set when a Calendar is constructed. For example, in US locale,
|
|
* firstDayOfWeek is SUNDAY; minimalDaysInFirstWeek is 1. They are used to figure
|
|
* out the week count for a specific date for a given locale. These must be set when
|
|
* a Calendar is constructed.
|
|
*/
|
|
EDaysOfWeek fFirstDayOfWeek;
|
|
uint8_t fMinimalDaysInFirstWeek;
|
|
|
|
/**
|
|
* Sets firstDayOfWeek and minimalDaysInFirstWeek. Called at Calendar construction
|
|
* time.
|
|
*
|
|
* @param desiredLocale The given locale.
|
|
* @param success Indicates the status of setting the week count data from
|
|
* the resource for the given locale. Returns U_ZERO_ERROR if
|
|
* constructed successfully.
|
|
*/
|
|
void setWeekCountData(const Locale& desiredLocale, UErrorCode& success);
|
|
|
|
/**
|
|
* Recompute the time and update the status fields isTimeSet
|
|
* and areFieldsSet. Callers should check isTimeSet and only
|
|
* call this method if isTimeSet is false.
|
|
*/
|
|
void updateTime(UErrorCode& status);
|
|
|
|
/**
|
|
* Convert a UnicodeString to a long integer, using the standard C library. Return
|
|
* both the value obtained, and a UErrorCode indicating success or failure. We fail
|
|
* if the string is zero length, of if strtol() does not parse all of the characters
|
|
* in the string, or if the value is not in the range 1..7.
|
|
*/
|
|
static int32_t stringToDayNumber(const UnicodeString& string, UErrorCode& status);
|
|
|
|
/**
|
|
* The resource tag for the resource where the week-count data is stored.
|
|
*/
|
|
static const char* kDateTimeElements;
|
|
};
|
|
|
|
// -------------------------------------
|
|
|
|
inline Calendar*
|
|
Calendar::createInstance(TimeZone* zone, UErrorCode& errorCode)
|
|
{
|
|
// since the Locale isn't specified, use the default locale
|
|
return createInstance(zone, Locale::getDefault(), errorCode);
|
|
}
|
|
|
|
// -------------------------------------
|
|
|
|
inline void
|
|
Calendar::roll(EDateFields field, bool_t up, UErrorCode& status)
|
|
{
|
|
roll(field, (int32_t)(up ? +1 : -1), status);
|
|
}
|
|
|
|
// -------------------------------------
|
|
|
|
/**
|
|
* Fast method for subclasses. The caller must maintain fUserSetDSTOffset and
|
|
* fUserSetZoneOffset, as well as the isSet[] array.
|
|
*/
|
|
inline void
|
|
Calendar::internalSet(EDateFields field, int32_t value)
|
|
{
|
|
fFields[field] = value;
|
|
}
|
|
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|
#endif // _CALENDAR
|