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/*
*******************************************************************************
* Copyright (C) 2003 - 2008, International Business Machines Corporation and  *
* others. All Rights Reserved.                                                *
*******************************************************************************
*/

#ifndef COPTCCAL_H
#define COPTCCAL_H

#include "unicode/utypes.h"

#if !UCONFIG_NO_FORMATTING

#include "unicode/calendar.h"
#include "cecal.h"

U_NAMESPACE_BEGIN

/**
 * Implement the Coptic calendar system.
 * @internal
 */
class CopticCalendar : public CECalendar {
  
public:
    /**
     * Useful constants for CopticCalendar.
     * @internal
     */
    enum EMonths {
        /** 
         * Constant for ωογτ/تﻮﺗ,
         * the 1st month of the Coptic year. 
         */
        TOUT,
        
        /** 
         * Constant for Παοπι/ﻪﺑﺎﺑ,
         * the 2nd month of the Coptic year. 
         */
        BABA,

        /** 
         * Constant for Αθορ/رﻮﺗﺎﻫ,
         * the 3rd month of the Coptic year. 
         */
        HATOR,

        /** 
         * Constant for Χοιακ/ﻚﻬﻴﻛ,
         * the 4th month of the Coptic year. 
         */
        KIAHK,

        /** 
         * Constant for Τωβι/طﻮﺒﻫ,
         * the 5th month of the Coptic year. 
         */
        TOBA,

        /** 
         * Constant for Μεϣιρ/ﺮﻴﺸﻣأ,
         * the 6th month of the Coptic year. 
         */
        AMSHIR,

        /** 
         * Constant for Παρεμϩατ/تﺎﻬﻣﺮﺑ,
         * the 7th month of the Coptic year. 
         */
        BARAMHAT,

        /** 
         * Constant for Φαρμοθι/هدﻮﻣﺮﺑ, 
         * the 8th month of the Coptic year. 
         */
        BARAMOUDA,

        /** 
         * Constant for Παϣαν/ﺲﻨﺸﺑ,
         * the 9th month of the Coptic year. 
         */
        BASHANS,

        /** 
         * Constant for Παωνι/ﻪﻧؤﻮﺑ,
         * the 10th month of the Coptic year. 
         */
        PAONA,

        /** 
         * Constant for Επηπ/ﺐﻴﺑأ,
         * the 11th month of the Coptic year. 
         */
        EPEP,

        /** 
         * Constant for Μεϲωρη/ىﺮﺴﻣ,
         * the 12th month of the Coptic year. 
         */
        MESRA,

        /** 
         * Constant for Πικογϫι
         * μαβοτ/ﺮﻴﻐﺼﻟا
         * ﺮﻬﺸﻟا,
         * the 13th month of the Coptic year. 
         */
        NASIE
    };

    enum EEras {
        BCE,    // Before the epoch
        CE      // After the epoch
    };

    /**
     * Constructs a CopticCalendar based on the current time in the default time zone
     * with the given locale.
     *
     * @param aLocale  The given locale.
     * @param success  Indicates the status of CopticCalendar object construction.
     *                 Returns U_ZERO_ERROR if constructed successfully.
     * @internal
     */
    CopticCalendar(const Locale& aLocale, UErrorCode& success);

    /**
     * Copy Constructor
     * @internal
     */
    CopticCalendar (const CopticCalendar& other);

    /**
     * Destructor.
     * @internal
     */
    virtual ~CopticCalendar();

    /**
     * Create and return a polymorphic copy of this calendar.
     * @return    return a polymorphic copy of this calendar.
     * @internal
     */
    virtual Calendar* clone(void) const;

    /**
     * return the calendar type, "coptic"
     * @return calendar type
     * @internal
     */
    const char * getType() const;

protected:
    //-------------------------------------------------------------------------
    // Calendar framework
    //-------------------------------------------------------------------------

    /**
     * Return the extended year defined by the current fields.
     * @internal
     */
    virtual int32_t handleGetExtendedYear();

    /**
     * Compute fields from the JD
     * @internal
     */
    virtual void handleComputeFields(int32_t julianDay, UErrorCode &status);

    /**
     * Returns the date of the start of the default century
     * @return start of century - in milliseconds since epoch, 1970
     * @internal
     */
    virtual UDate defaultCenturyStart() const;

    /**
     * Returns the year in which the default century begins
     * @internal
     */
    virtual int32_t defaultCenturyStartYear() const;

    /**
     * Return the date offset from Julian
     * @internal
     */
    virtual int32_t getJDEpochOffset() const;

private:
    /**
     * The system maintains a static default century start date.  This is initialized
     * the first time it is used.  Before then, it is set to SYSTEM_DEFAULT_CENTURY to
     * indicate an uninitialized state.  Once the system default century date and year
     * are set, they do not change.
     */
    static UDate fgSystemDefaultCenturyStart;

    /**
     * See documentation for systemDefaultCenturyStart.
     */
    static int32_t fgSystemDefaultCenturyStartYear;

    /**
     * Default value that indicates the defaultCenturyStartYear is unitialized
     */
    static const int32_t fgSystemDefaultCenturyYear;

    /**
     * start of default century, as a date
     */
    static const UDate fgSystemDefaultCentury;

    /**
     * Initializes the 100-year window that dates with 2-digit years
     * are considered to fall within so that its start date is 80 years
     * before the current time.
     */
    static void initializeSystemDefaultCentury(void);

public:
    /**
     * Override Calendar Returns a unique class ID POLYMORPHICALLY. Pure virtual
     * override. This method is to implement a simple version of RTTI, since not all C++
     * compilers support genuine RTTI. Polymorphic operator==() and clone() methods call
     * this method.
     *
     * @return   The class ID for this object. All objects of a given class have the
     *           same class ID. Objects of other classes have different class IDs.
     * @internal
     */
    virtual UClassID getDynamicClassID(void) const;

    /**
     * Return the class ID for this class. This is useful only for comparing to a return
     * value from getDynamicClassID(). For example:
     *
     *      Base* polymorphic_pointer = createPolymorphicObject();
     *      if (polymorphic_pointer->getDynamicClassID() ==
     *          Derived::getStaticClassID()) ...
     *
     * @return   The class ID for all objects of this class.
     * @internal
     */
    U_I18N_API static UClassID U_EXPORT2 getStaticClassID(void);  

#if 0
    // We do not want to introduce this API in ICU4C.
    // It was accidentally introduced in ICU4J as a public API.
public:
    //-------------------------------------------------------------------------
    // Calendar system Conversion methods...
    //-------------------------------------------------------------------------
    /**
     * Convert an Coptic year, month, and day to a Julian day.
     *
     * @param year the extended year
     * @param month the month
     * @param day the day
     * @return Julian day
     * @internal
     */
    static int32_t copticToJD(int32_t year, int32_t month, int32_t day);
#endif
};

U_NAMESPACE_END

#endif /* #if !UCONFIG_NO_FORMATTING */
#endif /* COPTCCAL_H */
//eof