2160 lines
87 KiB
C++
2160 lines
87 KiB
C++
/*
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********************************************************************************
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* Copyright (C) 1997-2006, International Business Machines
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* Corporation and others. All Rights Reserved.
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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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* 11/15/99 weiv added YEAR_WOY and DOW_LOCAL
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* to EDateFields
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* 8/19/2002 srl Removed Javaisms
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* 11/07/2003 srl Update, clean up documentation.
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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 "unicode/utypes.h"
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/**
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* \file
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* \brief C++ API: Calendar object
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*/
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#if !UCONFIG_NO_FORMATTING
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#include "unicode/uobject.h"
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#include "unicode/locid.h"
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#include "unicode/timezone.h"
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#include "unicode/ucal.h"
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#include "unicode/umisc.h"
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U_NAMESPACE_BEGIN
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class ICUServiceFactory;
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/**
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* @internal
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*/
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typedef int32_t UFieldResolutionTable[12][8];
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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 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.
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* The most commonly used subclass of <code>Calendar</code> is
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* <code>GregorianCalendar</code>. Other 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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* <b>NOTE</b>: (ICU 2.6) The subclass interface should be considered unstable
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* - it WILL change.
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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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* static method, <code>createInstance</code>, for getting a generally useful
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* object of this type. <code>Calendar</code>'s <code>createInstance</code> method
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* returns the appropriate <code>Calendar</code> subclass whose
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* time fields have been initialized with the current date and time:
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* \htmlonly<blockquote>\endhtmlonly
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* <pre>
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* Calendar *rightNow = Calendar::createInstance(errCode);
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* </pre>
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* \htmlonly</blockquote>\endhtmlonly
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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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* \htmlonly<blockquote>\endhtmlonly
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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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* \htmlonly</blockquote>\endhtmlonly
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*
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* For the time of day:
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*
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* \htmlonly<blockquote>\endhtmlonly
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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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* \htmlonly</blockquote>\endhtmlonly
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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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* @stable ICU 2.0
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*/
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class U_I18N_API Calendar : public UObject {
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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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* @deprecated ICU 2.6. Use C enum UCalendarDateFields defined in ucal.h
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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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YEAR_WOY, // 'Y' Example: 1..big number - Year of Week of Year
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DOW_LOCAL, // 'e' Example: 1..7 - Day of Week / Localized
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FIELD_COUNT = UCAL_FIELD_COUNT // See ucal.h for other fields.
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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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* @deprecated ICU 2.6. Use C enum UCalendarDaysOfWeek defined in ucal.h
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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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* @deprecated ICU 2.6. Use C enum UCalendarMonths defined in ucal.h
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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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* @deprecated ICU 2.6. Use C enum UCalendarAMPMs defined in ucal.h
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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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* @stable ICU 2.0
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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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* @return a polymorphic copy of this calendar.
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* @stable ICU 2.0
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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. U_MISSING_RESOURCE_ERROR will be returned if the resource data
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* requests a calendar type which has not been installed.
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* @return A Calendar if created successfully. NULL otherwise.
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* @stable ICU 2.0
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*/
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static Calendar* U_EXPORT2 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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* @stable ICU 2.0
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*/
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static Calendar* U_EXPORT2 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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* @stable ICU 2.0
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*/
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static Calendar* U_EXPORT2 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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* @stable ICU 2.0
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*/
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static Calendar* U_EXPORT2 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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* @stable ICU 2.0
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*/
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static Calendar* U_EXPORT2 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 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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* @stable ICU 2.0
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*/
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static Calendar* U_EXPORT2 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. Does not include user-registered Calendars.
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* @stable ICU 2.0
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*/
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static const Locale* U_EXPORT2 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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* @stable ICU 2.0
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*/
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static UDate U_EXPORT2 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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* @stable ICU 2.0
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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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* @param status Output param set to success/failure code on exit. If any value
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* 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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* @stable ICU 2.0
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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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* @stable ICU 2.0
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*/
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virtual UBool 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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* @stable ICU 2.0
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*/
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UBool operator!=(const Calendar& that) const {return !operator==(that);}
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/**
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* Returns TRUE if the given Calendar object is equivalent to this
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* one. An equivalent Calendar will behave exactly as this one
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* does, but it may be set to a different time. By contrast, for
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* the operator==() method to return TRUE, the other Calendar must
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* be set to the same time.
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*
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* @param other the Calendar to be compared with this Calendar
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* @stable ICU 2.4
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*/
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virtual UBool isEquivalentTo(const Calendar& other) const;
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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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* @stable ICU 2.0
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*/
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UBool 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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* @stable ICU 2.0
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*/
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UBool before(const Calendar& when, UErrorCode& status) const;
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|
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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
|
|
* (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
|
|
* 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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* @stable ICU 2.0
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*/
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UBool after(const Calendar& when, UErrorCode& status) 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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*
|
|
* @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.)
|
|
* @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.
|
|
* @deprecated ICU 2.6. use add(UCalendarDateFields field, int32_t amount, UErrorCode& status) instead.
|
|
*/
|
|
virtual void add(EDateFields field, int32_t amount, UErrorCode& status);
|
|
|
|
/**
|
|
* UDate Arithmetic function. Adds the specified (signed) amount of time to the given
|
|
* time field, based on the calendar's rules. For example, to subtract 5 days from
|
|
* the current time of the calendar, call add(Calendar::DATE, -5). When adding on
|
|
* the month or Calendar::MONTH field, other fields like date might conflict and
|
|
* need to be changed. For instance, adding 1 month on the date 01/31/96 will result
|
|
* in 02/29/96.
|
|
*
|
|
* @param field Specifies which date field to modify.
|
|
* @param amount The amount of time to be added to the field, in the natural unit
|
|
* for that field (e.g., days for the day fields, hours for the hour
|
|
* field.)
|
|
* @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.
|
|
* @stable ICU 2.6.
|
|
*/
|
|
virtual void add(UCalendarDateFields field, int32_t amount, UErrorCode& status);
|
|
|
|
/**
|
|
* Time Field Rolling function. Rolls (up/down) a single unit of time on the given
|
|
* time field. For example, to roll the current date up by one day, call
|
|
* roll(Calendar::DATE, true). When rolling on the year or Calendar::YEAR field, it
|
|
* will roll the year value in the range between getMinimum(Calendar::YEAR) and the
|
|
* value returned by getMaximum(Calendar::YEAR). When rolling on the month or
|
|
* Calendar::MONTH field, other fields like date might conflict and, need to be
|
|
* changed. For instance, rolling the month up on the date 01/31/96 will result in
|
|
* 02/29/96. Rolling up always means rolling forward in time; e.g., rolling the year
|
|
* up on "100 BC" will result in "99 BC", for Gregorian calendar. When rolling on the
|
|
* hour-in-day or Calendar::HOUR_OF_DAY field, it will roll the hour value in the range
|
|
* between 0 and 23, which is zero-based.
|
|
* <P>
|
|
* NOTE: Do not use this method -- use roll(EDateFields, int, UErrorCode&) instead.
|
|
*
|
|
* @param field The time field.
|
|
* @param up Indicates if the value of the specified time field is to be rolled
|
|
* up or rolled down. Use true if rolling up, false otherwise.
|
|
* @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.
|
|
* @deprecated ICU 2.6. Use roll(UCalendarDateFields field, UBool up, UErrorCode& status) instead.
|
|
*/
|
|
inline void roll(EDateFields field, UBool up, UErrorCode& status);
|
|
|
|
/**
|
|
* Time Field Rolling function. Rolls (up/down) a single unit of time on the given
|
|
* time field. For example, to roll the current date up by one day, call
|
|
* roll(Calendar::DATE, true). When rolling on the year or Calendar::YEAR field, it
|
|
* will roll the year value in the range between getMinimum(Calendar::YEAR) and the
|
|
* value returned by getMaximum(Calendar::YEAR). When rolling on the month or
|
|
* Calendar::MONTH field, other fields like date might conflict and, need to be
|
|
* changed. For instance, rolling the month up on the date 01/31/96 will result in
|
|
* 02/29/96. Rolling up always means rolling forward in time; e.g., rolling the year
|
|
* up on "100 BC" will result in "99 BC", for Gregorian calendar. When rolling on the
|
|
* hour-in-day or Calendar::HOUR_OF_DAY field, it will roll the hour value in the range
|
|
* between 0 and 23, which is zero-based.
|
|
* <P>
|
|
* NOTE: Do not use this method -- use roll(UCalendarDateFields, int, UErrorCode&) instead.
|
|
*
|
|
* @param field The time field.
|
|
* @param up Indicates if the value of the specified time field is to be rolled
|
|
* up or rolled down. Use true if rolling up, false otherwise.
|
|
* @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.
|
|
* @stable ICU 2.6.
|
|
*/
|
|
inline void roll(UCalendarDateFields field, UBool up, UErrorCode& status);
|
|
|
|
/**
|
|
* Time Field Rolling function. Rolls by the given amount on the given
|
|
* time field. For example, to roll the current date up by one day, call
|
|
* roll(Calendar::DATE, +1, status). When rolling on the month or
|
|
* Calendar::MONTH field, other fields like date might conflict and, need to be
|
|
* changed. For instance, rolling the month up on the date 01/31/96 will result in
|
|
* 02/29/96. Rolling by a positive value always means rolling forward in time;
|
|
* e.g., rolling the year by +1 on "100 BC" will result in "99 BC", for Gregorian
|
|
* calendar. When rolling on the hour-in-day or Calendar::HOUR_OF_DAY field, it will
|
|
* roll the hour value in the range between 0 and 23, which is zero-based.
|
|
* <P>
|
|
* The only difference between roll() and add() is that roll() does not change
|
|
* the value of more significant fields when it reaches the minimum or maximum
|
|
* of its range, whereas add() does.
|
|
*
|
|
* @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.
|
|
* @deprecated ICU 2.6. Use roll(UCalendarDateFields field, int32_t amount, UErrorCode& status) instead.
|
|
*/
|
|
virtual void roll(EDateFields field, int32_t amount, UErrorCode& status);
|
|
|
|
/**
|
|
* Time Field Rolling function. Rolls by the given amount on the given
|
|
* time field. For example, to roll the current date up by one day, call
|
|
* roll(Calendar::DATE, +1, status). When rolling on the month or
|
|
* Calendar::MONTH field, other fields like date might conflict and, need to be
|
|
* changed. For instance, rolling the month up on the date 01/31/96 will result in
|
|
* 02/29/96. Rolling by a positive value always means rolling forward in time;
|
|
* e.g., rolling the year by +1 on "100 BC" will result in "99 BC", for Gregorian
|
|
* calendar. When rolling on the hour-in-day or Calendar::HOUR_OF_DAY field, it will
|
|
* roll the hour value in the range between 0 and 23, which is zero-based.
|
|
* <P>
|
|
* The only difference between roll() and add() is that roll() does not change
|
|
* the value of more significant fields when it reaches the minimum or maximum
|
|
* of its range, whereas add() does.
|
|
*
|
|
* @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.
|
|
* @stable ICU 2.6.
|
|
*/
|
|
virtual void roll(UCalendarDateFields field, int32_t amount, UErrorCode& status);
|
|
|
|
/**
|
|
* Return the difference between the given time and the time this
|
|
* calendar object is set to. If this calendar is set
|
|
* <em>before</em> the given time, the returned value will be
|
|
* positive. If this calendar is set <em>after</em> the given
|
|
* time, the returned value will be negative. The
|
|
* <code>field</code> parameter specifies the units of the return
|
|
* value. For example, if <code>fieldDifference(when,
|
|
* Calendar::MONTH)</code> returns 3, then this calendar is set to
|
|
* 3 months before <code>when</code>, and possibly some addition
|
|
* time less than one month.
|
|
*
|
|
* <p>As a side effect of this call, this calendar is advanced
|
|
* toward <code>when</code> by the given amount. That is, calling
|
|
* this method has the side effect of calling <code>add(field,
|
|
* n)</code>, where <code>n</code> is the return value.
|
|
*
|
|
* <p>Usage: To use this method, call it first with the largest
|
|
* field of interest, then with progressively smaller fields. For
|
|
* example:
|
|
*
|
|
* <pre>
|
|
* int y = cal->fieldDifference(when, Calendar::YEAR, err);
|
|
* int m = cal->fieldDifference(when, Calendar::MONTH, err);
|
|
* int d = cal->fieldDifference(when, Calendar::DATE, err);</pre>
|
|
*
|
|
* computes the difference between <code>cal</code> and
|
|
* <code>when</code> in years, months, and days.
|
|
*
|
|
* <p>Note: <code>fieldDifference()</code> is
|
|
* <em>asymmetrical</em>. That is, in the following code:
|
|
*
|
|
* <pre>
|
|
* cal->setTime(date1, err);
|
|
* int m1 = cal->fieldDifference(date2, Calendar::MONTH, err);
|
|
* int d1 = cal->fieldDifference(date2, Calendar::DATE, err);
|
|
* cal->setTime(date2, err);
|
|
* int m2 = cal->fieldDifference(date1, Calendar::MONTH, err);
|
|
* int d2 = cal->fieldDifference(date1, Calendar::DATE, err);</pre>
|
|
*
|
|
* one might expect that <code>m1 == -m2 && d1 == -d2</code>.
|
|
* However, this is not generally the case, because of
|
|
* irregularities in the underlying calendar system (e.g., the
|
|
* Gregorian calendar has a varying number of days per month).
|
|
*
|
|
* @param when the date to compare this calendar's time to
|
|
* @param field the field in which to compute the result
|
|
* @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.
|
|
* @return the difference, either positive or negative, between
|
|
* this calendar's time and <code>when</code>, in terms of
|
|
* <code>field</code>.
|
|
* @deprecated ICU 2.6. Use fieldDifference(UDate when, UCalendarDateFields field, UErrorCode& status).
|
|
*/
|
|
virtual int32_t fieldDifference(UDate when, EDateFields field, UErrorCode& status);
|
|
|
|
/**
|
|
* Return the difference between the given time and the time this
|
|
* calendar object is set to. If this calendar is set
|
|
* <em>before</em> the given time, the returned value will be
|
|
* positive. If this calendar is set <em>after</em> the given
|
|
* time, the returned value will be negative. The
|
|
* <code>field</code> parameter specifies the units of the return
|
|
* value. For example, if <code>fieldDifference(when,
|
|
* Calendar::MONTH)</code> returns 3, then this calendar is set to
|
|
* 3 months before <code>when</code>, and possibly some addition
|
|
* time less than one month.
|
|
*
|
|
* <p>As a side effect of this call, this calendar is advanced
|
|
* toward <code>when</code> by the given amount. That is, calling
|
|
* this method has the side effect of calling <code>add(field,
|
|
* n)</code>, where <code>n</code> is the return value.
|
|
*
|
|
* <p>Usage: To use this method, call it first with the largest
|
|
* field of interest, then with progressively smaller fields. For
|
|
* example:
|
|
*
|
|
* <pre>
|
|
* int y = cal->fieldDifference(when, Calendar::YEAR, err);
|
|
* int m = cal->fieldDifference(when, Calendar::MONTH, err);
|
|
* int d = cal->fieldDifference(when, Calendar::DATE, err);</pre>
|
|
*
|
|
* computes the difference between <code>cal</code> and
|
|
* <code>when</code> in years, months, and days.
|
|
*
|
|
* <p>Note: <code>fieldDifference()</code> is
|
|
* <em>asymmetrical</em>. That is, in the following code:
|
|
*
|
|
* <pre>
|
|
* cal->setTime(date1, err);
|
|
* int m1 = cal->fieldDifference(date2, Calendar::MONTH, err);
|
|
* int d1 = cal->fieldDifference(date2, Calendar::DATE, err);
|
|
* cal->setTime(date2, err);
|
|
* int m2 = cal->fieldDifference(date1, Calendar::MONTH, err);
|
|
* int d2 = cal->fieldDifference(date1, Calendar::DATE, err);</pre>
|
|
*
|
|
* one might expect that <code>m1 == -m2 && d1 == -d2</code>.
|
|
* However, this is not generally the case, because of
|
|
* irregularities in the underlying calendar system (e.g., the
|
|
* Gregorian calendar has a varying number of days per month).
|
|
*
|
|
* @param when the date to compare this calendar's time to
|
|
* @param field the field in which to compute the result
|
|
* @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.
|
|
* @return the difference, either positive or negative, between
|
|
* this calendar's time and <code>when</code>, in terms of
|
|
* <code>field</code>.
|
|
* @stable ICU 2.6.
|
|
*/
|
|
virtual int32_t fieldDifference(UDate when, UCalendarDateFields field, UErrorCode& status);
|
|
|
|
/**
|
|
* 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.
|
|
* @stable ICU 2.0
|
|
*/
|
|
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 zone The given time zone.
|
|
* @stable ICU 2.0
|
|
*/
|
|
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.
|
|
* @stable ICU 2.0
|
|
*/
|
|
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.
|
|
* @stable ICU 2.0
|
|
*/
|
|
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.
|
|
* @stable ICU 2.0
|
|
*/
|
|
virtual UBool 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
|
|
* @stable ICU 2.0
|
|
*/
|
|
void setLenient(UBool lenient);
|
|
|
|
/**
|
|
* Tells whether date/time interpretation is to be lenient.
|
|
*
|
|
* @return True tells that date/time interpretation is to be lenient.
|
|
* @stable ICU 2.0
|
|
*/
|
|
UBool 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.
|
|
* @deprecated ICU 2.6. Use setFirstDayOfWeek(UCalendarDaysOfWeek value) instead.
|
|
*/
|
|
void setFirstDayOfWeek(EDaysOfWeek value);
|
|
|
|
/**
|
|
* 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.
|
|
* @stable ICU 2.6.
|
|
*/
|
|
void setFirstDayOfWeek(UCalendarDaysOfWeek 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.
|
|
* @deprecated ICU 2.6 use the overload with error code
|
|
*/
|
|
EDaysOfWeek getFirstDayOfWeek(void) const;
|
|
|
|
/**
|
|
* Gets what the first day of the week is; e.g., Sunday in US, Monday in France.
|
|
*
|
|
* @param status error code
|
|
* @return The first day of the week.
|
|
* @stable ICU 2.6
|
|
*/
|
|
UCalendarDaysOfWeek getFirstDayOfWeek(UErrorCode &status) 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.
|
|
* @stable ICU 2.0
|
|
*/
|
|
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.
|
|
* @stable ICU 2.0
|
|
*/
|
|
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.
|
|
* @deprecated ICU 2.6. Use getMinimum(UCalendarDateFields field) instead.
|
|
*/
|
|
virtual int32_t getMinimum(EDateFields field) 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.
|
|
* @stable ICU 2.6.
|
|
*/
|
|
virtual int32_t getMinimum(UCalendarDateFields field) const;
|
|
|
|
/**
|
|
* 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.
|
|
* @deprecated ICU 2.6. Use getMaximum(UCalendarDateFields field) instead.
|
|
*/
|
|
virtual int32_t getMaximum(EDateFields field) const;
|
|
|
|
/**
|
|
* 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.
|
|
* @stable ICU 2.6.
|
|
*/
|
|
virtual int32_t getMaximum(UCalendarDateFields field) const;
|
|
|
|
/**
|
|
* 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.
|
|
* @deprecated ICU 2.6. Use getGreatestMinimum(UCalendarDateFields field) instead.
|
|
*/
|
|
virtual int32_t getGreatestMinimum(EDateFields field) const;
|
|
|
|
/**
|
|
* 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.
|
|
* @stable ICU 2.6.
|
|
*/
|
|
virtual int32_t getGreatestMinimum(UCalendarDateFields field) const;
|
|
|
|
/**
|
|
* 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.
|
|
* @deprecated ICU 2.6. Use getLeastMaximum(UCalendarDateFields field) instead.
|
|
*/
|
|
virtual int32_t getLeastMaximum(EDateFields field) const;
|
|
|
|
/**
|
|
* 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.
|
|
* @stable ICU 2.6.
|
|
*/
|
|
virtual int32_t getLeastMaximum(UCalendarDateFields field) const;
|
|
|
|
/**
|
|
* 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
|
|
* @param status Fill-in parameter which receives the status of this operation.
|
|
* @return the minimum of the given field for the current date of this Calendar
|
|
* @deprecated ICU 2.6. Use getActualMinimum(UCalendarDateFields field, UErrorCode& status) instead.
|
|
*/
|
|
int32_t getActualMinimum(EDateFields field, UErrorCode& status) const;
|
|
|
|
/**
|
|
* 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
|
|
* @param status Fill-in parameter which receives the status of this operation.
|
|
* @return the minimum of the given field for the current date of this Calendar
|
|
* @stable ICU 2.6.
|
|
*/
|
|
int32_t getActualMinimum(UCalendarDateFields 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
|
|
* @param status Fill-in parameter which receives the status of this operation.
|
|
* @return the maximum of the given field for the current date of this Calendar
|
|
* @deprecated ICU 2.6. Use getActualMaximum(UCalendarDateFields field, UErrorCode& status) instead.
|
|
*/
|
|
int32_t getActualMaximum(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
|
|
* @param status Fill-in parameter which receives the status of this operation.
|
|
* @return the maximum of the given field for the current date of this Calendar
|
|
* @stable ICU 2.6.
|
|
*/
|
|
int32_t getActualMaximum(UCalendarDateFields 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.
|
|
* @deprecated ICU 2.6. Use get(UCalendarDateFields field, UErrorCode& status) instead.
|
|
*/
|
|
int32_t get(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.
|
|
* @stable ICU 2.6.
|
|
*/
|
|
int32_t get(UCalendarDateFields 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.
|
|
*
|
|
* @param field The given time field.
|
|
* @return True if the given time field has a value set; false otherwise.
|
|
* @deprecated ICU 2.6. Use isSet(UCalendarDateFields field) instead.
|
|
*/
|
|
UBool isSet(EDateFields field) 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.
|
|
*
|
|
* @param field The given time field.
|
|
* @return True if the given time field has a value set; false otherwise.
|
|
* @stable ICU 2.6.
|
|
*/
|
|
UBool isSet(UCalendarDateFields 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.
|
|
* @deprecated ICU 2.6. Use set(UCalendarDateFields field, int32_t value) instead.
|
|
*/
|
|
void set(EDateFields field, int32_t value);
|
|
|
|
/**
|
|
* 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.
|
|
* @stable ICU 2.6.
|
|
*/
|
|
void set(UCalendarDateFields 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.
|
|
* @stable ICU 2.0
|
|
*/
|
|
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.
|
|
* @stable ICU 2.0
|
|
*/
|
|
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.
|
|
* @stable ICU 2.0
|
|
*/
|
|
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.
|
|
* @stable ICU 2.0
|
|
*/
|
|
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.
|
|
* @deprecated ICU 2.6. Use clear(UCalendarDateFields field) instead.
|
|
*/
|
|
void clear(EDateFields field);
|
|
|
|
/**
|
|
* 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.
|
|
* @stable ICU 2.6.
|
|
*/
|
|
void clear(UCalendarDateFields 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.
|
|
* @stable ICU 2.0
|
|
*/
|
|
virtual UClassID getDynamicClassID(void) const = 0;
|
|
|
|
/**
|
|
* Returns the resource key string used for this calendar type.
|
|
* For example, prepending "Eras_" to this string could return "Eras_japanese"
|
|
* or "Eras_gregorian".
|
|
*
|
|
* @returns static string, for example, "gregorian" or "japanese"
|
|
* @internal
|
|
*/
|
|
virtual const char * getType() 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.
|
|
* @stable ICU 2.0
|
|
*/
|
|
Calendar(UErrorCode& success);
|
|
|
|
/**
|
|
* Copy constructor
|
|
*
|
|
* @param source Calendar object to be copied from
|
|
* @stable ICU 2.0
|
|
*/
|
|
Calendar(const Calendar& source);
|
|
|
|
/**
|
|
* Default assignment operator
|
|
*
|
|
* @param right Calendar object to be copied
|
|
* @stable ICU 2.0
|
|
*/
|
|
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 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.
|
|
* @stable ICU 2.0
|
|
*/
|
|
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.
|
|
* @stable ICU 2.0
|
|
*/
|
|
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.
|
|
* @stable ICU 2.0
|
|
*/
|
|
virtual void computeTime(UErrorCode& status);
|
|
|
|
/**
|
|
* 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().
|
|
*
|
|
* @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.
|
|
* @stable ICU 2.0
|
|
*/
|
|
virtual void computeFields(UErrorCode& status);
|
|
|
|
/**
|
|
* Gets this Calendar's current time as a long.
|
|
*
|
|
* @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.
|
|
* @return the current time as UTC milliseconds from the epoch.
|
|
* @stable ICU 2.0
|
|
*/
|
|
double getTimeInMillis(UErrorCode& status) const;
|
|
|
|
/**
|
|
* Sets this Calendar's current time from the given long value.
|
|
* @param millis the new time in UTC milliseconds from the epoch.
|
|
* @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.
|
|
* @stable ICU 2.0
|
|
*/
|
|
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.
|
|
* @stable ICU 2.0
|
|
*/
|
|
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.
|
|
* @deprecated ICU 2.6. Use internalGet(UCalendarDateFields field) instead.
|
|
*/
|
|
inline int32_t internalGet(EDateFields field) const {return fFields[field];}
|
|
|
|
/**
|
|
* Gets the value for a given time field. Subclasses can use this function to get
|
|
* field values without forcing recomputation of time. If the field's stamp is UNSET,
|
|
* the defaultValue is used.
|
|
*
|
|
* @param field The given time field.
|
|
* @param defaultValue a default value used if the field is unset.
|
|
* @return The value for the given time field.
|
|
* @internal
|
|
*/
|
|
inline int32_t internalGet(UCalendarDateFields field, int32_t defaultValue) const {return fStamp[field]>kUnset ? fFields[field] : defaultValue;}
|
|
|
|
/**
|
|
* 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.
|
|
* @internal
|
|
*/
|
|
inline int32_t internalGet(UCalendarDateFields 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.
|
|
*
|
|
* @param field The given time field.
|
|
* @param value The value for the given time field.
|
|
* @deprecated ICU 2.6. Use internalSet(UCalendarDateFields field, int32_t value) instead.
|
|
*/
|
|
void internalSet(EDateFields field, int32_t value);
|
|
|
|
/**
|
|
* 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.
|
|
*
|
|
* @param field The given time field.
|
|
* @param value The value for the given time field.
|
|
* @stable ICU 2.6.
|
|
*/
|
|
inline void internalSet(UCalendarDateFields field, int32_t value);
|
|
|
|
/**
|
|
* Prepare this calendar for computing the actual minimum or maximum.
|
|
* This method modifies this calendar's fields; it is called on a
|
|
* temporary calendar.
|
|
* @internal
|
|
*/
|
|
virtual void prepareGetActual(UCalendarDateFields field, UBool isMinimum, UErrorCode &status);
|
|
|
|
/**
|
|
* Limit enums. Not in sync with UCalendarLimitType (refers to internal fields).
|
|
* @internal
|
|
*/
|
|
enum ELimitType {
|
|
UCAL_LIMIT_MINIMUM = 0,
|
|
UCAL_LIMIT_GREATEST_MINIMUM,
|
|
UCAL_LIMIT_LEAST_MAXIMUM,
|
|
UCAL_LIMIT_MAXIMUM,
|
|
UCAL_LIMIT_COUNT
|
|
};
|
|
|
|
/**
|
|
* Subclass API for defining limits of different types.
|
|
* Subclasses must implement this method to return limits for the
|
|
* following fields:
|
|
*
|
|
* <pre>UCAL_ERA
|
|
* UCAL_YEAR
|
|
* UCAL_MONTH
|
|
* UCAL_WEEK_OF_YEAR
|
|
* UCAL_WEEK_OF_MONTH
|
|
* UCAL_DATE (DAY_OF_MONTH on Java)
|
|
* UCAL_DAY_OF_YEAR
|
|
* UCAL_DAY_OF_WEEK_IN_MONTH
|
|
* UCAL_YEAR_WOY
|
|
* UCAL_EXTENDED_YEAR</pre>
|
|
*
|
|
* @param field one of the above field numbers
|
|
* @param limitType one of <code>MINIMUM</code>, <code>GREATEST_MINIMUM</code>,
|
|
* <code>LEAST_MAXIMUM</code>, or <code>MAXIMUM</code>
|
|
* @internal
|
|
*/
|
|
virtual int32_t handleGetLimit(UCalendarDateFields field, ELimitType limitType) const = 0;
|
|
|
|
/**
|
|
* Return a limit for a field.
|
|
* @param field the field, from <code>0..UCAL_MAX_FIELD</code>
|
|
* @param limitType the type specifier for the limit
|
|
* @see #ELimitType
|
|
* @internal
|
|
*/
|
|
virtual int32_t getLimit(UCalendarDateFields field, ELimitType limitType) const;
|
|
|
|
|
|
/**
|
|
* Return the Julian day number of day before the first day of the
|
|
* given month in the given extended year. Subclasses should override
|
|
* this method to implement their calendar system.
|
|
* @param eyear the extended year
|
|
* @param month the zero-based month, or 0 if useMonth is false
|
|
* @param useMonth if false, compute the day before the first day of
|
|
* the given year, otherwise, compute the day before the first day of
|
|
* the given month
|
|
* @return the Julian day number of the day before the first
|
|
* day of the given month and year
|
|
* @internal
|
|
*/
|
|
virtual int32_t handleComputeMonthStart(int32_t eyear, int32_t month,
|
|
UBool useMonth) const = 0;
|
|
|
|
/**
|
|
* Return the number of days in the given month of the given extended
|
|
* year of this calendar system. Subclasses should override this
|
|
* method if they can provide a more correct or more efficient
|
|
* implementation than the default implementation in Calendar.
|
|
* @internal
|
|
*/
|
|
virtual int32_t handleGetMonthLength(int32_t extendedYear, int32_t month) const ;
|
|
|
|
/**
|
|
* Return the number of days in the given extended year of this
|
|
* calendar system. Subclasses should override this method if they can
|
|
* provide a more correct or more efficient implementation than the
|
|
* default implementation in Calendar.
|
|
* @stable ICU 2.0
|
|
*/
|
|
virtual int32_t handleGetYearLength(int32_t eyear) const;
|
|
|
|
|
|
/**
|
|
* Return the extended year defined by the current fields. This will
|
|
* use the UCAL_EXTENDED_YEAR field or the UCAL_YEAR and supra-year fields (such
|
|
* as UCAL_ERA) specific to the calendar system, depending on which set of
|
|
* fields is newer.
|
|
* @return the extended year
|
|
* @internal
|
|
*/
|
|
virtual int32_t handleGetExtendedYear() = 0;
|
|
|
|
/**
|
|
* Subclasses may override this. This method calls
|
|
* handleGetMonthLength() to obtain the calendar-specific month
|
|
* length.
|
|
* @param bestField which field to use to calculate the date
|
|
* @return julian day specified by calendar fields.
|
|
* @internal
|
|
*/
|
|
virtual int32_t handleComputeJulianDay(UCalendarDateFields bestField);
|
|
|
|
/**
|
|
* Subclasses must override this to convert from week fields
|
|
* (YEAR_WOY and WEEK_OF_YEAR) to an extended year in the case
|
|
* where YEAR, EXTENDED_YEAR are not set.
|
|
* The Calendar implementation assumes yearWoy is in extended gregorian form
|
|
* @internal
|
|
* @return the extended year, UCAL_EXTENDED_YEAR
|
|
*/
|
|
virtual int32_t handleGetExtendedYearFromWeekFields(int32_t yearWoy, int32_t woy);
|
|
|
|
/**
|
|
* Compute the Julian day from fields. Will determine whether to use
|
|
* the JULIAN_DAY field directly, or other fields.
|
|
* @return the julian day
|
|
* @internal
|
|
*/
|
|
int32_t computeJulianDay();
|
|
|
|
/**
|
|
* Compute the milliseconds in the day from the fields. This is a
|
|
* value from 0 to 23:59:59.999 inclusive, unless fields are out of
|
|
* range, in which case it can be an arbitrary value. This value
|
|
* reflects local zone wall time.
|
|
* @internal
|
|
*/
|
|
int32_t computeMillisInDay();
|
|
|
|
/**
|
|
* This method can assume EXTENDED_YEAR has been set.
|
|
* @param millis milliseconds of the date fields
|
|
* @param millisInDay milliseconds of the time fields; may be out
|
|
* or range.
|
|
* @param ec Output param set to failure code on function return
|
|
* when this function fails.
|
|
* @internal
|
|
*/
|
|
int32_t computeZoneOffset(double millis, int32_t millisInDay, UErrorCode &ec);
|
|
|
|
|
|
/**
|
|
* Determine the best stamp in a range.
|
|
* @param start first enum to look at
|
|
* @param end last enum to look at
|
|
* @param bestSoFar stamp prior to function call
|
|
* @return the stamp value of the best stamp
|
|
* @internal
|
|
*/
|
|
int32_t newestStamp(UCalendarDateFields start, UCalendarDateFields end, int32_t bestSoFar) const;
|
|
|
|
/**
|
|
* Values for field resolution tables
|
|
* @see #resolveFields
|
|
* @internal
|
|
*/
|
|
enum {
|
|
/** Marker for end of resolve set (row or group). */
|
|
kResolveSTOP = -1,
|
|
/** Value to be bitwised "ORed" against resolve table field values for remapping. Example: (UCAL_DATE | kResolveRemap) in 1st column will cause 'UCAL_DATE' to be returned, but will not examine the value of UCAL_DATE. */
|
|
kResolveRemap = 32
|
|
};
|
|
|
|
/**
|
|
* Precedence table for Dates
|
|
* @see #resolveFields
|
|
* @internal
|
|
*/
|
|
static const UFieldResolutionTable kDatePrecedence[];
|
|
|
|
/**
|
|
* Precedence table for Year
|
|
* @see #resolveFields
|
|
* @internal
|
|
*/
|
|
static const UFieldResolutionTable kYearPrecedence[];
|
|
|
|
/**
|
|
* Precedence table for Day of Week
|
|
* @see #resolveFields
|
|
* @internal
|
|
*/
|
|
static const UFieldResolutionTable kDOWPrecedence[];
|
|
|
|
/**
|
|
* Given a precedence table, return the newest field combination in
|
|
* the table, or UCAL_FIELD_COUNT if none is found.
|
|
*
|
|
* <p>The precedence table is a 3-dimensional array of integers. It
|
|
* may be thought of as an array of groups. Each group is an array of
|
|
* lines. Each line is an array of field numbers. Within a line, if
|
|
* all fields are set, then the time stamp of the line is taken to be
|
|
* the stamp of the most recently set field. If any field of a line is
|
|
* unset, then the line fails to match. Within a group, the line with
|
|
* the newest time stamp is selected. The first field of the line is
|
|
* returned to indicate which line matched.
|
|
*
|
|
* <p>In some cases, it may be desirable to map a line to field that
|
|
* whose stamp is NOT examined. For example, if the best field is
|
|
* DAY_OF_WEEK then the DAY_OF_WEEK_IN_MONTH algorithm may be used. In
|
|
* order to do this, insert the value <code>kResolveRemap | F</code> at
|
|
* the start of the line, where <code>F</code> is the desired return
|
|
* field value. This field will NOT be examined; it only determines
|
|
* the return value if the other fields in the line are the newest.
|
|
*
|
|
* <p>If all lines of a group contain at least one unset field, then no
|
|
* line will match, and the group as a whole will fail to match. In
|
|
* that case, the next group will be processed. If all groups fail to
|
|
* match, then UCAL_FIELD_COUNT is returned.
|
|
* @internal
|
|
*/
|
|
UCalendarDateFields resolveFields(const UFieldResolutionTable *precedenceTable);
|
|
|
|
|
|
/**
|
|
* @internal
|
|
*/
|
|
virtual const UFieldResolutionTable* getFieldResolutionTable() const;
|
|
|
|
/**
|
|
* Return the field that is newer, either defaultField, or
|
|
* alternateField. If neither is newer or neither is set, return defaultField.
|
|
* @internal
|
|
*/
|
|
UCalendarDateFields newerField(UCalendarDateFields defaultField, UCalendarDateFields alternateField) const;
|
|
|
|
|
|
private:
|
|
/**
|
|
* Helper function for calculating limits by trial and error
|
|
* @param field The field being investigated
|
|
* @param startValue starting (least max) value of field
|
|
* @param endValue ending (greatest max) value of field
|
|
* @param status return type
|
|
* @internal
|
|
*/
|
|
int32_t getActualHelper(UCalendarDateFields field, int32_t startValue, int32_t endValue, UErrorCode &status) const;
|
|
|
|
|
|
protected:
|
|
/**
|
|
* The flag which indicates if the current time is set in the calendar.
|
|
* @stable ICU 2.0
|
|
*/
|
|
UBool 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.
|
|
* @stable ICU 2.0
|
|
*/
|
|
UBool fAreFieldsSet;
|
|
|
|
/**
|
|
* True if all of the fields have been set. This is initially false, and set to
|
|
* true by computeFields().
|
|
* @stable ICU 2.0
|
|
*/
|
|
UBool fAreAllFieldsSet;
|
|
|
|
/**
|
|
* True if all fields have been virtually set, but have not yet been
|
|
* computed. This occurs only in setTimeInMillis(). A calendar set
|
|
* to this state will compute all fields from the time if it becomes
|
|
* necessary, but otherwise will delay such computation.
|
|
* @draft ICU 3.0
|
|
*/
|
|
UBool fAreFieldsVirtuallySet;
|
|
|
|
/**
|
|
* Get the current time without recomputing.
|
|
*
|
|
* @return the current time without recomputing.
|
|
* @stable ICU 2.0
|
|
*/
|
|
UDate internalGetTime(void) const { return fTime; }
|
|
|
|
/**
|
|
* Set the current time without affecting flags or fields.
|
|
*
|
|
* @param time The time to be set
|
|
* @return the current time without recomputing.
|
|
* @stable ICU 2.0
|
|
*/
|
|
void internalSetTime(UDate time) { fTime = time; }
|
|
|
|
/**
|
|
* The time fields containing values into which the millis is computed.
|
|
* @stable ICU 2.0
|
|
*/
|
|
int32_t fFields[UCAL_FIELD_COUNT];
|
|
|
|
/**
|
|
* The flags which tell if a specified time field for the calendar is set.
|
|
* @deprecated ICU 2.8 use (fStamp[n]!=kUnset)
|
|
*/
|
|
UBool fIsSet[UCAL_FIELD_COUNT];
|
|
|
|
/** Special values of stamp[]
|
|
* @stable ICU 2.0
|
|
*/
|
|
enum {
|
|
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.
|
|
* @stable ICU 2.0
|
|
*/
|
|
int32_t fStamp[UCAL_FIELD_COUNT];
|
|
|
|
/**
|
|
* Subclasses may override this method to compute several fields
|
|
* specific to each calendar system. These are:
|
|
*
|
|
* <ul><li>ERA
|
|
* <li>YEAR
|
|
* <li>MONTH
|
|
* <li>DAY_OF_MONTH
|
|
* <li>DAY_OF_YEAR
|
|
* <li>EXTENDED_YEAR</ul>
|
|
*
|
|
* Subclasses can refer to the DAY_OF_WEEK and DOW_LOCAL fields, which
|
|
* will be set when this method is called. Subclasses can also call
|
|
* the getGregorianXxx() methods to obtain Gregorian calendar
|
|
* equivalents for the given Julian day.
|
|
*
|
|
* <p>In addition, subclasses should compute any subclass-specific
|
|
* fields, that is, fields from BASE_FIELD_COUNT to
|
|
* getFieldCount() - 1.
|
|
*
|
|
* <p>The default implementation in <code>Calendar</code> implements
|
|
* a pure proleptic Gregorian calendar.
|
|
* @internal
|
|
*/
|
|
virtual void handleComputeFields(int32_t julianDay, UErrorCode &status);
|
|
|
|
/**
|
|
* Return the extended year on the Gregorian calendar as computed by
|
|
* <code>computeGregorianFields()</code>.
|
|
* @see #computeGregorianFields
|
|
* @internal
|
|
*/
|
|
int32_t getGregorianYear() const {
|
|
return fGregorianYear;
|
|
}
|
|
|
|
/**
|
|
* Return the month (0-based) on the Gregorian calendar as computed by
|
|
* <code>computeGregorianFields()</code>.
|
|
* @see #computeGregorianFields
|
|
* @internal
|
|
*/
|
|
int32_t getGregorianMonth() const {
|
|
return fGregorianMonth;
|
|
}
|
|
|
|
/**
|
|
* Return the day of year (1-based) on the Gregorian calendar as
|
|
* computed by <code>computeGregorianFields()</code>.
|
|
* @see #computeGregorianFields
|
|
* @internal
|
|
*/
|
|
int32_t getGregorianDayOfYear() const {
|
|
return fGregorianDayOfYear;
|
|
}
|
|
|
|
/**
|
|
* Return the day of month (1-based) on the Gregorian calendar as
|
|
* computed by <code>computeGregorianFields()</code>.
|
|
* @see #computeGregorianFields
|
|
* @internal
|
|
*/
|
|
int32_t getGregorianDayOfMonth() const {
|
|
return fGregorianDayOfMonth;
|
|
}
|
|
|
|
/**
|
|
* Called by computeJulianDay. Returns the default month (0-based) for the year,
|
|
* taking year and era into account. Defaults to 0 for Gregorian, which doesn't care.
|
|
* @internal
|
|
* @internal
|
|
*/
|
|
virtual int32_t getDefaultMonthInYear() ;
|
|
|
|
|
|
/**
|
|
* Called by computeJulianDay. Returns the default day (1-based) for the month,
|
|
* taking currently-set year and era into account. Defaults to 1 for Gregorian.
|
|
* @internal
|
|
*/
|
|
virtual int32_t getDefaultDayInMonth(int32_t /*month*/);
|
|
|
|
//-------------------------------------------------------------------------
|
|
// Protected utility methods for use by subclasses. These are very handy
|
|
// for implementing add, roll, and computeFields.
|
|
//-------------------------------------------------------------------------
|
|
|
|
/**
|
|
* Adjust the specified field so that it is within
|
|
* the allowable range for the date to which this calendar is set.
|
|
* For example, in a Gregorian calendar pinning the {@link #UCalendarDateFields DAY_OF_MONTH}
|
|
* field for a calendar set to April 31 would cause it to be set
|
|
* to April 30.
|
|
* <p>
|
|
* <b>Subclassing:</b>
|
|
* <br>
|
|
* This utility method is intended for use by subclasses that need to implement
|
|
* their own overrides of {@link #roll roll} and {@link #add add}.
|
|
* <p>
|
|
* <b>Note:</b>
|
|
* <code>pinField</code> is implemented in terms of
|
|
* {@link #getActualMinimum getActualMinimum}
|
|
* and {@link #getActualMaximum getActualMaximum}. If either of those methods uses
|
|
* a slow, iterative algorithm for a particular field, it would be
|
|
* unwise to attempt to call <code>pinField</code> for that field. If you
|
|
* really do need to do so, you should override this method to do
|
|
* something more efficient for that field.
|
|
* <p>
|
|
* @param field The calendar field whose value should be pinned.
|
|
* @param status Output param set to failure code on function return
|
|
* when this function fails.
|
|
*
|
|
* @see #getActualMinimum
|
|
* @see #getActualMaximum
|
|
* @stable ICU 2.0
|
|
*/
|
|
virtual void pinField(UCalendarDateFields field, UErrorCode& status);
|
|
|
|
/**
|
|
* Return the week number of a day, within a period. This may be the week number in
|
|
* a year or the week number in a month. Usually this will be a value >= 1, but if
|
|
* some initial days of the period are excluded from week 1, because
|
|
* {@link #getMinimalDaysInFirstWeek getMinimalDaysInFirstWeek} is > 1, then
|
|
* the week number will be zero for those
|
|
* initial days. This method requires the day number and day of week for some
|
|
* known date in the period in order to determine the day of week
|
|
* on the desired day.
|
|
* <p>
|
|
* <b>Subclassing:</b>
|
|
* <br>
|
|
* This method is intended for use by subclasses in implementing their
|
|
* {@link #computeTime computeTime} and/or {@link #computeFields computeFields} methods.
|
|
* It is often useful in {@link #getActualMinimum getActualMinimum} and
|
|
* {@link #getActualMaximum getActualMaximum} as well.
|
|
* <p>
|
|
* This variant is handy for computing the week number of some other
|
|
* day of a period (often the first or last day of the period) when its day
|
|
* of the week is not known but the day number and day of week for some other
|
|
* day in the period (e.g. the current date) <em>is</em> known.
|
|
* <p>
|
|
* @param desiredDay The {@link #UCalendarDateFields DAY_OF_YEAR} or
|
|
* {@link #UCalendarDateFields DAY_OF_MONTH} whose week number is desired.
|
|
* Should be 1 for the first day of the period.
|
|
*
|
|
* @param dayOfPeriod The {@link #UCalendarDateFields DAY_OF_YEAR}
|
|
* or {@link #UCalendarDateFields DAY_OF_MONTH} for a day in the period whose
|
|
* {@link #UCalendarDateFields DAY_OF_WEEK} is specified by the
|
|
* <code>knownDayOfWeek</code> parameter.
|
|
* Should be 1 for first day of period.
|
|
*
|
|
* @param dayOfWeek The {@link #UCalendarDateFields DAY_OF_WEEK} for the day
|
|
* corresponding to the <code>knownDayOfPeriod</code> parameter.
|
|
* 1-based with 1=Sunday.
|
|
*
|
|
* @return The week number (one-based), or zero if the day falls before
|
|
* the first week because
|
|
* {@link #getMinimalDaysInFirstWeek getMinimalDaysInFirstWeek}
|
|
* is more than one.
|
|
*
|
|
* @stable ICU 2.8
|
|
*/
|
|
int32_t weekNumber(int32_t desiredDay, int32_t dayOfPeriod, int32_t dayOfWeek);
|
|
|
|
|
|
/**
|
|
* Return the week number of a day, within a period. This may be the week number in
|
|
* a year, or the week number in a month. Usually this will be a value >= 1, but if
|
|
* some initial days of the period are excluded from week 1, because
|
|
* {@link #getMinimalDaysInFirstWeek getMinimalDaysInFirstWeek} is > 1,
|
|
* then the week number will be zero for those
|
|
* initial days. This method requires the day of week for the given date in order to
|
|
* determine the result.
|
|
* <p>
|
|
* <b>Subclassing:</b>
|
|
* <br>
|
|
* This method is intended for use by subclasses in implementing their
|
|
* {@link #computeTime computeTime} and/or {@link #computeFields computeFields} methods.
|
|
* It is often useful in {@link #getActualMinimum getActualMinimum} and
|
|
* {@link #getActualMaximum getActualMaximum} as well.
|
|
* <p>
|
|
* @param dayOfPeriod The {@link #UCalendarDateFields DAY_OF_YEAR} or
|
|
* {@link #UCalendarDateFields DAY_OF_MONTH} whose week number is desired.
|
|
* Should be 1 for the first day of the period.
|
|
*
|
|
* @param dayOfWeek The {@link #UCalendarDateFields DAY_OF_WEEK} for the day
|
|
* corresponding to the <code>dayOfPeriod</code> parameter.
|
|
* 1-based with 1=Sunday.
|
|
*
|
|
* @return The week number (one-based), or zero if the day falls before
|
|
* the first week because
|
|
* {@link #getMinimalDaysInFirstWeek getMinimalDaysInFirstWeek}
|
|
* is more than one.
|
|
* @internal
|
|
*/
|
|
inline int32_t weekNumber(int32_t dayOfPeriod, int32_t dayOfWeek);
|
|
|
|
/**
|
|
* returns the local DOW, valid range 0..6
|
|
* @internal
|
|
*/
|
|
int32_t getLocalDOW();
|
|
|
|
private:
|
|
|
|
/**
|
|
* The next available value for fStamp[]
|
|
*/
|
|
int32_t fNextStamp;// = MINIMUM_USER_STAMP;
|
|
|
|
/**
|
|
* The current time set for the calendar.
|
|
*/
|
|
UDate fTime;
|
|
|
|
/**
|
|
* @see #setLenient
|
|
*/
|
|
UBool 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.
|
|
*/
|
|
UCalendarDaysOfWeek fFirstDayOfWeek;
|
|
uint8_t fMinimalDaysInFirstWeek;
|
|
|
|
/**
|
|
* Sets firstDayOfWeek and minimalDaysInFirstWeek. Called at Calendar construction
|
|
* time.
|
|
*
|
|
* @param desiredLocale The given locale.
|
|
* @param type The calendar type identifier, e.g: gregorian, buddhist, etc.
|
|
* @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, const char *type, 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.
|
|
*
|
|
* @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 updateTime(UErrorCode& status);
|
|
|
|
/**
|
|
* The Gregorian year, as computed by computeGregorianFields() and
|
|
* returned by getGregorianYear().
|
|
*/
|
|
int32_t fGregorianYear;
|
|
|
|
/**
|
|
* The Gregorian month, as computed by computeGregorianFields() and
|
|
* returned by getGregorianMonth().
|
|
*/
|
|
int32_t fGregorianMonth;
|
|
|
|
/**
|
|
* The Gregorian day of the year, as computed by
|
|
* computeGregorianFields() and returned by getGregorianDayOfYear().
|
|
*/
|
|
int32_t fGregorianDayOfYear;
|
|
|
|
/**
|
|
* The Gregorian day of the month, as computed by
|
|
* computeGregorianFields() and returned by getGregorianDayOfMonth().
|
|
*/
|
|
int32_t fGregorianDayOfMonth;
|
|
|
|
/* calculations */
|
|
|
|
/**
|
|
* Compute the Gregorian calendar year, month, and day of month from
|
|
* the given Julian day. These values are not stored in fields, but in
|
|
* member variables gregorianXxx. Also compute the DAY_OF_WEEK and
|
|
* DOW_LOCAL fields.
|
|
*/
|
|
void computeGregorianAndDOWFields(int32_t julianDay, UErrorCode &ec);
|
|
|
|
/**
|
|
* Compute the Gregorian calendar year, month, and day of month from the
|
|
* Julian day. These values are not stored in fields, but in member
|
|
* variables gregorianXxx. They are used for time zone computations and by
|
|
* subclasses that are Gregorian derivatives. Subclasses may call this
|
|
* method to perform a Gregorian calendar millis->fields computation.
|
|
* To perform a Gregorian calendar fields->millis computation, call
|
|
* computeGregorianMonthStart().
|
|
* @see #computeGregorianMonthStart
|
|
*/
|
|
void computeGregorianFields(int32_t julianDay, UErrorCode &ec);
|
|
|
|
/**
|
|
* Compute the fields WEEK_OF_YEAR, YEAR_WOY, WEEK_OF_MONTH,
|
|
* DAY_OF_WEEK_IN_MONTH, and DOW_LOCAL from EXTENDED_YEAR, YEAR,
|
|
* DAY_OF_WEEK, and DAY_OF_YEAR. The latter fields are computed by the
|
|
* subclass based on the calendar system.
|
|
*
|
|
* <p>The YEAR_WOY field is computed simplistically. It is equal to YEAR
|
|
* most of the time, but at the year boundary it may be adjusted to YEAR-1
|
|
* or YEAR+1 to reflect the overlap of a week into an adjacent year. In
|
|
* this case, a simple increment or decrement is performed on YEAR, even
|
|
* though this may yield an invalid YEAR value. For instance, if the YEAR
|
|
* is part of a calendar system with an N-year cycle field CYCLE, then
|
|
* incrementing the YEAR may involve incrementing CYCLE and setting YEAR
|
|
* back to 0 or 1. This is not handled by this code, and in fact cannot be
|
|
* simply handled without having subclasses define an entire parallel set of
|
|
* fields for fields larger than or equal to a year. This additional
|
|
* complexity is not warranted, since the intention of the YEAR_WOY field is
|
|
* to support ISO 8601 notation, so it will typically be used with a
|
|
* proleptic Gregorian calendar, which has no field larger than a year.
|
|
*/
|
|
void computeWeekFields(UErrorCode &ec);
|
|
|
|
|
|
/**
|
|
* Ensure that each field is within its valid range by calling {@link
|
|
* #validateField(int, int&)} on each field that has been set. This method
|
|
* should only be called if this calendar is not lenient.
|
|
* @see #isLenient
|
|
* @see #validateField(int, int&)
|
|
* @internal
|
|
*/
|
|
void validateFields(UErrorCode &status);
|
|
|
|
/**
|
|
* Validate a single field of this calendar. Subclasses should
|
|
* override this method to validate any calendar-specific fields.
|
|
* Generic fields can be handled by
|
|
* <code>Calendar.validateField()</code>.
|
|
* @see #validateField(int, int, int, int&)
|
|
* @internal
|
|
*/
|
|
virtual void validateField(UCalendarDateFields field, UErrorCode &status);
|
|
|
|
/**
|
|
* Validate a single field of this calendar given its minimum and
|
|
* maximum allowed value. If the field is out of range,
|
|
* <code>U_ILLEGAL_ARGUMENT_ERROR</code> will be set. Subclasses may
|
|
* use this method in their implementation of {@link
|
|
* #validateField(int, int&)}.
|
|
* @internal
|
|
*/
|
|
void validateField(UCalendarDateFields field, int32_t min, int32_t max, UErrorCode& status);
|
|
|
|
protected:
|
|
/**
|
|
* Convert a quasi Julian date to the day of the week. The Julian date used here is
|
|
* not a true Julian date, since it is measured from midnight, not noon. Return
|
|
* value is one-based.
|
|
*
|
|
* @param julian The given Julian date number.
|
|
* @return Day number from 1..7 (SUN..SAT).
|
|
* @internal
|
|
*/
|
|
static uint8_t julianDayToDayOfWeek(double julian);
|
|
|
|
private:
|
|
char validLocale[ULOC_FULLNAME_CAPACITY];
|
|
char actualLocale[ULOC_FULLNAME_CAPACITY];
|
|
|
|
public:
|
|
#if !UCONFIG_NO_SERVICE
|
|
/**
|
|
* INTERNAL FOR 2.6 -- Registration.
|
|
*/
|
|
|
|
/**
|
|
* Return a StringEnumeration over the locales available at the time of the call,
|
|
* including registered locales.
|
|
* @return a StringEnumeration over the locales available at the time of the call
|
|
* @internal
|
|
*/
|
|
static StringEnumeration* getAvailableLocales(void);
|
|
|
|
/**
|
|
* Register a new Calendar factory. The factory will be adopted.
|
|
* INTERNAL in 2.6
|
|
* @param toAdopt the factory instance to be adopted
|
|
* @param status the in/out status code, no special meanings are assigned
|
|
* @return a registry key that can be used to unregister this factory
|
|
* @internal
|
|
*/
|
|
static URegistryKey registerFactory(ICUServiceFactory* toAdopt, UErrorCode& status);
|
|
|
|
/**
|
|
* Unregister a previously-registered CalendarFactory using the key returned from the
|
|
* register call. Key becomes invalid after a successful call and should not be used again.
|
|
* The CalendarFactory corresponding to the key will be deleted.
|
|
* INTERNAL in 2.6
|
|
* @param key the registry key returned by a previous call to registerFactory
|
|
* @param status the in/out status code, no special meanings are assigned
|
|
* @return TRUE if the factory for the key was successfully unregistered
|
|
* @internal
|
|
*/
|
|
static UBool unregister(URegistryKey key, UErrorCode& status);
|
|
|
|
/**
|
|
* Multiple Calendar Implementation
|
|
* @internal
|
|
*/
|
|
friend class CalendarFactory;
|
|
|
|
/**
|
|
* Multiple Calendar Implementation
|
|
* @internal
|
|
*/
|
|
friend class CalendarService;
|
|
|
|
/**
|
|
* Multiple Calendar Implementation
|
|
* @internal
|
|
*/
|
|
friend class DefaultCalendarFactory;
|
|
#endif /* !UCONFIG_NO_SERVICE */
|
|
|
|
/**
|
|
* @internal
|
|
* @return TRUE if this calendar has a default century (i.e. 03 -> 2003)
|
|
*/
|
|
virtual UBool haveDefaultCentury() const = 0;
|
|
|
|
/**
|
|
* @internal
|
|
* @return the start of the default century, as a UDate
|
|
*/
|
|
virtual UDate defaultCenturyStart() const = 0;
|
|
/**
|
|
* @internal
|
|
* @return the beginning year of the default century, as a year
|
|
*/
|
|
virtual int32_t defaultCenturyStartYear() const = 0;
|
|
|
|
/** Get the locale for this calendar object. You can choose between valid and actual locale.
|
|
* @param type type of the locale we're looking for (valid or actual)
|
|
* @param status error code for the operation
|
|
* @return the locale
|
|
* @stable ICU 2.8
|
|
*/
|
|
Locale getLocale(ULocDataLocaleType type, UErrorCode &status) const;
|
|
|
|
/** Get the locale for this calendar object. You can choose between valid and actual locale.
|
|
* @param type type of the locale we're looking for (valid or actual)
|
|
* @param status error code for the operation
|
|
* @return the locale
|
|
* @internal
|
|
*/
|
|
const char* getLocaleID(ULocDataLocaleType type, UErrorCode &status) const;
|
|
|
|
};
|
|
|
|
// -------------------------------------
|
|
|
|
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(UCalendarDateFields field, UBool up, UErrorCode& status)
|
|
{
|
|
roll(field, (int32_t)(up ? +1 : -1), status);
|
|
}
|
|
|
|
inline void
|
|
Calendar::roll(EDateFields field, UBool up, UErrorCode& status)
|
|
{
|
|
roll((UCalendarDateFields) field, up, status);
|
|
}
|
|
|
|
|
|
// -------------------------------------
|
|
|
|
/**
|
|
* Fast method for subclasses. The caller must maintain fUserSetDSTOffset and
|
|
* fUserSetZoneOffset, as well as the isSet[] array.
|
|
*/
|
|
|
|
inline void
|
|
Calendar::internalSet(UCalendarDateFields field, int32_t value)
|
|
{
|
|
fFields[field] = value;
|
|
fStamp[field] = kInternallySet;
|
|
fIsSet[field] = TRUE; // Remove later
|
|
}
|
|
|
|
inline void
|
|
Calendar::internalSet(EDateFields field, int32_t value)
|
|
{
|
|
internalSet((UCalendarDateFields) field, value);
|
|
}
|
|
|
|
inline int32_t Calendar::weekNumber(int32_t dayOfPeriod, int32_t dayOfWeek)
|
|
{
|
|
return weekNumber(dayOfPeriod, dayOfPeriod, dayOfWeek);
|
|
}
|
|
|
|
|
|
U_NAMESPACE_END
|
|
|
|
#endif /* #if !UCONFIG_NO_FORMATTING */
|
|
|
|
#endif // _CALENDAR
|