| // © 2016 and later: Unicode, Inc. and others. |
| // License & terms of use: http://www.unicode.org/copyright.html |
| /* |
| ***************************************************************************** |
| * Copyright (C) 2003-2008, International Business Machines Corporation |
| * and others. All Rights Reserved. |
| ***************************************************************************** |
| * |
| * File INDIANCAL.H |
| ***************************************************************************** |
| */ |
| |
| #ifndef INDIANCAL_H |
| #define INDIANCAL_H |
| |
| #include "unicode/utypes.h" |
| |
| #if !UCONFIG_NO_FORMATTING |
| |
| #include "unicode/calendar.h" |
| |
| U_NAMESPACE_BEGIN |
| |
| /** |
| * Concrete class which provides the Indian calendar. |
| * <P> |
| * <code>IndianCalendar</code> is a subclass of <code>Calendar</code> |
| * that numbers years since the begining of SAKA ERA. This is the civil calendar |
| * which is accepted by government of India as Indian National Calendar. |
| * The two calendars most widely used in India today are the Vikrama calendar |
| * followed in North India and the Shalivahana or Saka calendar which is followed |
| * in South India and Maharashtra. |
| |
| * A variant of the Shalivahana Calendar was reformed and standardized as the |
| * Indian National calendar in 1957. |
| * <p> |
| * Some details of Indian National Calendar (to be implemented) : |
| * The Months |
| * Month Length Start date (Gregorian) |
| * ================================================= |
| * 1 Chaitra 30/31 March 22* |
| * 2 Vaisakha 31 April 21 |
| * 3 Jyaistha 31 May 22 |
| * 4 Asadha 31 June 22 |
| * 5 Sravana 31 July 23 |
| * 6 Bhadra 31 August 23 |
| * 7 Asvina 30 September 23 |
| * 8 Kartika 30 October 23 |
| * 9 Agrahayana 30 November 22 |
| * 10 Pausa 30 December 22 |
| * 11 Magha 30 January 21 |
| * 12 Phalguna 30 February 20 |
| |
| * In leap years, Chaitra has 31 days and starts on March 21 instead. |
| * The leap years of Gregorian calendar and Indian National Calendar are in synchornization. |
| * So When its a leap year in Gregorian calendar then Chaitra has 31 days. |
| * |
| * The Years |
| * Years are counted in the Saka Era, which starts its year 0 in 78AD (by gregorian calendar). |
| * So for eg. 9th June 2006 by Gregorian Calendar, is same as 19th of Jyaistha in 1928 of Saka |
| * era by Indian National Calendar. |
| * <p> |
| * The Indian Calendar has only one allowable era: <code>Saka Era</code>. If the |
| * calendar is not in lenient mode (see <code>setLenient</code>), dates before |
| * 1/1/1 Saka Era are rejected with an <code>IllegalArgumentException</code>. |
| * <p> |
| * @internal |
| */ |
| |
| |
| class U_I18N_API IndianCalendar : public Calendar { |
| public: |
| /** |
| * Useful constants for IndianCalendar. |
| * @internal |
| */ |
| enum EEras { |
| /** |
| * Constant for Chaitra, the 1st month of the Indian year. |
| */ |
| CHAITRA, |
| |
| /** |
| * Constant for Vaisakha, the 2nd month of the Indian year. |
| */ |
| VAISAKHA, |
| |
| /** |
| * Constant for Jyaistha, the 3rd month of the Indian year. |
| */ |
| JYAISTHA, |
| |
| /** |
| * Constant for Asadha, the 4th month of the Indian year. |
| */ |
| ASADHA, |
| |
| /** |
| * Constant for Sravana, the 5th month of the Indian year. |
| */ |
| SRAVANA, |
| |
| /** |
| * Constant for Bhadra the 6th month of the Indian year |
| */ |
| BHADRA, |
| |
| /** |
| * Constant for the Asvina, the 7th month of the Indian year. |
| */ |
| ASVINA, |
| |
| /** |
| * Constant for Kartika, the 8th month of the Indian year. |
| */ |
| KARTIKA, |
| |
| /** |
| * Constant for Agrahayana, the 9th month of the Indian year. |
| */ |
| AGRAHAYANA, |
| |
| /** |
| * Constant for Pausa, the 10th month of the Indian year. |
| */ |
| PAUSA, |
| |
| /** |
| * Constant for Magha, the 11th month of the Indian year. |
| */ |
| MAGHA, |
| |
| /** |
| * Constant for Phalguna, the 12th month of the Indian year. |
| */ |
| PHALGUNA |
| }; |
| |
| //------------------------------------------------------------------------- |
| // Constructors... |
| //------------------------------------------------------------------------- |
| |
| /** |
| * Constructs an IndianCalendar 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 IndianCalendar object construction. |
| * Returns U_ZERO_ERROR if constructed successfully. |
| * @param beCivil Whether the calendar should be civil (default-true) or religious (false) |
| * @internal |
| */ |
| IndianCalendar(const Locale& aLocale, UErrorCode &success); |
| |
| /** |
| * Copy Constructor |
| * @internal |
| */ |
| IndianCalendar(const IndianCalendar& other); |
| |
| /** |
| * Destructor. |
| * @internal |
| */ |
| virtual ~IndianCalendar(); |
| |
| /** |
| * Determines whether this object uses the fixed-cycle Indian civil calendar |
| * or an approximation of the religious, astronomical calendar. |
| * |
| * @param beCivil <code>CIVIL</code> to use the civil calendar, |
| * <code>ASTRONOMICAL</code> to use the astronomical calendar. |
| * @internal |
| */ |
| //void setCivil(ECivil beCivil, UErrorCode &status); |
| |
| /** |
| * Returns <code>true</code> if this object is using the fixed-cycle civil |
| * calendar, or <code>false</code> if using the religious, astronomical |
| * calendar. |
| * @internal |
| */ |
| //UBool isCivil(); |
| |
| |
| // TODO: copy c'tor, etc |
| |
| // clone |
| virtual IndianCalendar* clone() const; |
| |
| private: |
| /** |
| * Determine whether a year is the gregorian year a leap year |
| */ |
| //static UBool isGregorianLeap(int32_t year); |
| //---------------------------------------------------------------------- |
| // Calendar framework |
| //---------------------------------------------------------------------- |
| protected: |
| /** |
| * @internal |
| */ |
| virtual int32_t handleGetLimit(UCalendarDateFields field, ELimitType limitType) const; |
| |
| /** |
| * Return the length (in days) of the given month. |
| * |
| * @param year The year in Saka era |
| * @param year The month(0-based) in Indian year |
| * @internal |
| */ |
| virtual int32_t handleGetMonthLength(int32_t extendedYear, int32_t month) const; |
| |
| /** |
| * Return the number of days in the given Indian year |
| * @internal |
| */ |
| virtual int32_t handleGetYearLength(int32_t extendedYear) const; |
| |
| //------------------------------------------------------------------------- |
| // Functions for converting from field values to milliseconds.... |
| //------------------------------------------------------------------------- |
| |
| // Return JD of start of given month/year |
| /** |
| * @internal |
| */ |
| virtual int32_t handleComputeMonthStart(int32_t eyear, int32_t month, UBool useMonth) const; |
| |
| //------------------------------------------------------------------------- |
| // Functions for converting from milliseconds to field values |
| //------------------------------------------------------------------------- |
| |
| /** |
| * @internal |
| */ |
| virtual int32_t handleGetExtendedYear(); |
| |
| /** |
| * Override Calendar to compute several fields specific to the Indian |
| * calendar system. These are: |
| * |
| * <ul><li>ERA |
| * <li>YEAR |
| * <li>MONTH |
| * <li>DAY_OF_MONTH |
| * <li>DAY_OF_YEAR |
| * <li>EXTENDED_YEAR</ul> |
| * |
| * The DAY_OF_WEEK and DOW_LOCAL fields are already set when this |
| * method is called. The getGregorianXxx() methods return Gregorian |
| * calendar equivalents for the given Julian day. |
| * @internal |
| */ |
| virtual void handleComputeFields(int32_t julianDay, UErrorCode &status); |
| |
| // UObject stuff |
| public: |
| /** |
| * @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 |
| */ |
| static UClassID U_EXPORT2 getStaticClassID(void); |
| |
| /** |
| * return the calendar type, "indian". |
| * |
| * @return calendar type |
| * @internal |
| */ |
| virtual const char * getType() const; |
| |
| private: |
| IndianCalendar(); // default constructor not implemented |
| |
| // Default century. |
| protected: |
| |
| /** |
| * (Overrides Calendar) Return true if the current date for this Calendar is in |
| * Daylight Savings Time. Recognizes DST_OFFSET, if it is set. |
| * |
| * @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. |
| * @internal |
| */ |
| virtual UBool inDaylightTime(UErrorCode& status) const; |
| |
| |
| /** |
| * Returns true because the Indian Calendar does have a default century |
| * @internal |
| */ |
| virtual UBool haveDefaultCentury() const; |
| |
| /** |
| * 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; |
| }; |
| |
| U_NAMESPACE_END |
| |
| #endif |
| #endif |
| |
| |
| |