324 lines
8.4 KiB
C++
324 lines
8.4 KiB
C++
// © 2016 and later: Unicode, Inc. and others.
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// License & terms of use: http://www.unicode.org/copyright.html
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/*
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******************************************************************************
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* Copyright (C) 2003-2013, International Business Machines Corporation
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* and others. All Rights Reserved.
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******************************************************************************
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*
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* File PERSNCAL.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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* 9/23/2003 mehran posted to icu-design
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*****************************************************************************
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*/
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#ifndef PERSNCAL_H
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#define PERSNCAL_H
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#include "unicode/utypes.h"
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#if !UCONFIG_NO_FORMATTING
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#include "unicode/calendar.h"
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U_NAMESPACE_BEGIN
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/**
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* <code>PersianCalendar</code> is a subclass of <code>Calendar</code>
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* that implements the Persian calendar. It is used as the official
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* calendar in Iran. This calendar is also known as the "Hijri Shamsi"
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* calendar, since it starts at the time of Mohammed's emigration (or
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* "hijra") to Medinah on Thursday, July 15, 622 AD (Julian) and is a
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* solar calendar system (or "shamsi").
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* <p>
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* The Persian calendar is strictly solar, and thus a Persian year has twelve
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* solar months. A Persian year is about 365 days long, except in leap years
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* which is 366 days long.
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* <p>
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* The six first months of Persian Calendar are 31 days long. The next five
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* months are 30 days long. The last month is 29 days long in normal years,
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* and 30 days long in leap years.
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*
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* @see GregorianCalendar
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*
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* @author Mehran Mehr
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* @internal
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*/
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class PersianCalendar : public Calendar {
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public:
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//-------------------------------------------------------------------------
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// Constants...
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//-------------------------------------------------------------------------
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/**
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* Constants for the months
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* @internal
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*/
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enum EMonths {
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/**
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* Constant for Farvardin, the 1st month of the Persian year.
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* @internal
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*/
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FARVARDIN = 0,
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/**
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* Constant for Ordibehesht, the 2nd month of the Persian year.
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* @internal
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*/
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ORDIBEHESHT = 1,
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/**
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* Constant for Khordad, the 3rd month of the Persian year.
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* @internal
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*/
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KHORDAD = 2,
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/**
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* Constant for Tir, the 4th month of the Persian year.
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* @internal
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*/
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TIR = 3,
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/**
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* Constant for Mordad, the 5th month of the Persian year.
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* @internal
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*/
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MORDAD = 4,
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/**
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* Constant for Shahrivar, the 6th month of the Persian year.
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* @internal
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*/
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SHAHRIVAR = 5,
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/**
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* Constant for Mehr, the 7th month of the Persian year.
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* @internal
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*/
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MEHR = 6,
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/**
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* Constant for Aban, the 8th month of the Persian year.
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* @internal
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*/
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ABAN = 7,
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/**
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* Constant for Azar, the 9th month of the Persian year.
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* @internal
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*/
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AZAR = 8,
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/**
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* Constant for Dei, the 10th month of the Persian year.
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* @internal
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*/
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DEI = 9,
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/**
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* Constant for Bahman, the 11th month of the Persian year.
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* @internal
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*/
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BAHMAN = 10,
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/**
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* Constant for Esfand, the 12th month of the Persian year.
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* @internal
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*/
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ESFAND = 11,
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PERSIAN_MONTH_MAX
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};
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//-------------------------------------------------------------------------
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// Constructors...
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//-------------------------------------------------------------------------
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/**
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* Constructs a PersianCalendar based on the current time in the default time zone
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* with the given locale.
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*
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* @param aLocale The given locale.
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* @param success Indicates the status of PersianCalendar object construction.
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* Returns U_ZERO_ERROR if constructed successfully.
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* @internal
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*/
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PersianCalendar(const Locale& aLocale, UErrorCode &success);
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/**
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* Copy Constructor
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* @internal
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*/
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PersianCalendar(const PersianCalendar& other);
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/**
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* Destructor.
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* @internal
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*/
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virtual ~PersianCalendar();
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// TODO: copy c'tor, etc
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// clone
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virtual PersianCalendar* clone() const;
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private:
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/**
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* Determine whether a year is a leap year in the Persian calendar
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*/
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static UBool isLeapYear(int32_t year);
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/**
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* Return the day # on which the given year starts. Days are counted
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* from the Hijri epoch, origin 0.
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*/
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int32_t yearStart(int32_t year);
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/**
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* Return the day # on which the given month starts. Days are counted
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* from the Hijri epoch, origin 0.
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*
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* @param year The hijri shamsi year
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* @param year The hijri shamsi month, 0-based
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*/
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int32_t monthStart(int32_t year, int32_t month) const;
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//----------------------------------------------------------------------
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// Calendar framework
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//----------------------------------------------------------------------
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protected:
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/**
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* @internal
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*/
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virtual int32_t handleGetLimit(UCalendarDateFields field, ELimitType limitType) const;
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/**
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* Return the length (in days) of the given month.
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*
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* @param year The hijri shamsi year
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* @param year The hijri shamsi month, 0-based
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* @internal
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*/
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virtual int32_t handleGetMonthLength(int32_t extendedYear, int32_t month) const;
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/**
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* Return the number of days in the given Persian year
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* @internal
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*/
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virtual int32_t handleGetYearLength(int32_t extendedYear) const;
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//-------------------------------------------------------------------------
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// Functions for converting from field values to milliseconds....
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//-------------------------------------------------------------------------
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// Return JD of start of given month/year
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/**
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* @internal
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*/
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virtual int32_t handleComputeMonthStart(int32_t eyear, int32_t month, UBool useMonth) const;
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//-------------------------------------------------------------------------
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// Functions for converting from milliseconds to field values
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//-------------------------------------------------------------------------
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/**
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* @internal
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*/
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virtual int32_t handleGetExtendedYear();
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/**
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* Override Calendar to compute several fields specific to the Persian
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* calendar system. These are:
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*
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* <ul><li>ERA
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* <li>YEAR
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* <li>MONTH
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* <li>DAY_OF_MONTH
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* <li>DAY_OF_YEAR
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* <li>EXTENDED_YEAR</ul>
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*
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* The DAY_OF_WEEK and DOW_LOCAL fields are already set when this
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* method is called. The getGregorianXxx() methods return Gregorian
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* calendar equivalents for the given Julian day.
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* @internal
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*/
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virtual void handleComputeFields(int32_t julianDay, UErrorCode &status);
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// UObject stuff
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public:
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/**
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* @return The class ID for this object. All objects of a given class have the
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* same class ID. Objects of other classes have different class IDs.
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* @internal
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*/
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virtual UClassID getDynamicClassID(void) const;
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/**
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* Return the class ID for this class. This is useful only for comparing to a return
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* value from getDynamicClassID(). For example:
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*
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* Base* polymorphic_pointer = createPolymorphicObject();
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* if (polymorphic_pointer->getDynamicClassID() ==
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* Derived::getStaticClassID()) ...
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*
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* @return The class ID for all objects of this class.
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* @internal
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*/
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U_I18N_API static UClassID U_EXPORT2 getStaticClassID(void);
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/**
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* return the calendar type, "persian".
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*
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* @return calendar type
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* @internal
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*/
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virtual const char * getType() const;
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private:
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PersianCalendar(); // default constructor not implemented
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protected:
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/**
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* (Overrides Calendar) Return true if the current date for this Calendar is in
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* Daylight Savings Time. Recognizes DST_OFFSET, if it is set.
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*
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* @param status Fill-in parameter which receives the status of this operation.
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* @return True if the current date for this Calendar is in Daylight Savings Time,
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* false, otherwise.
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* @internal
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*/
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virtual UBool inDaylightTime(UErrorCode& status) const;
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/**
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* Returns TRUE because the Persian Calendar does have a default century
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* @internal
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*/
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virtual UBool haveDefaultCentury() const;
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/**
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* Returns the date of the start of the default century
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* @return start of century - in milliseconds since epoch, 1970
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* @internal
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*/
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virtual UDate defaultCenturyStart() const;
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/**
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* Returns the year in which the default century begins
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* @internal
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*/
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virtual int32_t defaultCenturyStartYear() const;
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};
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U_NAMESPACE_END
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#endif
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#endif
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