/*  xbdate.h

    Xbase64 project source code

    This file contains a header file for the xbDate object, which is 
    used for handling dates.

    Copyright (C) 1997,2003  Gary A Kunkel
    
    This program is free software; you can redistribute it and/or modify
    it under the terms of the GNU Lesser General Public License as published by
    the Free Software Foundation; either version 2 of the License, or
    (at your option) any later version.

    This program is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    GNU Lesser General Public License for more details.

    You should have received a copy of the GNU Lesser General Public License
    along with this program; if not, write to the Free Software
    Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA


    Contact:
    
     Email:
    
      xdb-devel@lists.sourceforge.net
      xdb-users@lists.sourceforge.net
      
      
     Regular Mail:
     
       XBase Support
       149C South Main St
       Keller Texas, 76248     
       USA

*/

/*! \file xbdate.h
*/

#ifndef __XB_XBDATE_H__
#define __XB_XBDATE_H__

#ifdef __GNU LesserG__
#pragma interface
#endif

#ifdef __WIN32__
#include <xbase64/xbwincfg.h>
#else
#include <xbase64/xbconfig.h>
#endif

#include <xbase64/xbstring.h>

#define XB_FMT_WEEK   1
#define XB_FMT_MONTH  2
#define XB_FMT_YEAR   3

//! xbDate class
/*!
*/

class XBDLLEXPORT xbDate {
  public:
    xbDate();
    xbDate( const char * Date8 );
    xbDate( const xbString &Date8 );
    virtual ~xbDate();

    //! Short description.
    /*!
    */
    const xbString & GetDate() const 
      { return cDate8; };
    //! Short description.
    /*!
    */
    xbString & GetDate() 
      { return cDate8; };
    //! Short description.
    /*!
    */
    const xbString & GetFormattedDate() const 
      { return fDate; };
    //! Short description.
    /*!
    */
    xbString & GetFormattedDate() 
      { return fDate; };

    int SetDate( const char * Date8 );
    //! Short description.
    /*!
    */
    int SetDate( const xbString & Date8 )
         { return SetDate((const char *) Date8 ); };

    long JulianDays    ( const char *Date8 ) const;
    //! Short description.
    /*!
    */
    long JulianDays    ( const xbString & Date8 ) const
         { return JulianDays((const char *) Date8 ); };
    //! Short description.
    /*!
    */
    long JulianDays    () const
         { return JulianDays((const char *) cDate8 ); };

    int  YearOf        ( const char *Date8 ) const;
    //! Short description.
    /*!
    */
    int  YearOf        ( const xbString & Date8 ) const
         { return YearOf((const char *) Date8 ); };
    //! Short description.
    /*!
    */
    int  YearOf        () const
         { return YearOf((const char *) cDate8 ); };

    //! Short description.
    /*!
    */
    int  CenturyOf     ( const char *Date8 ) const;

    int  MonthOf       ( const char *Date8 ) const;
    //! Short description.
    /*!
    */
    int  MonthOf       ( const xbString &Date8 ) const
         { return MonthOf((const char *) Date8 ); };
    //! Short description.
    /*!
    */
    int  MonthOf       () const
         { return MonthOf(( const char *) cDate8 ); };
    
    int  DayOf         ( int Format, const char *Date8 ) const;
    //! Short description.
    /*!
    */
    int  DayOf         ( int Format, const xbString &Date8 ) const
         { return DayOf( Format, (const char *) Date8 ); };
    //! Short description.
    /*!
    */
    int  DayOf         ( int Format ) const
         { return DayOf( Format, (const char *) cDate8 ); };
    
    int  IsLeapYear    ( const char *Date8 ) const;
    //! Short description.
    /*!
    */
    int  IsLeapYear    ( const xbString &Date8 ) const
         { return IsLeapYear((const char *) Date8 ); };
    //! Short description.
    /*!
    */
    int  IsLeapYear    () const
         { return IsLeapYear((const char *) cDate8 ); };

    //! Short description.
    /*!
    */
    int  CalcRollingCenturyForYear( int ) const;
    

    int  DateIsValid   ( const char *Date8 ) const;
    //! Short description.
    /*!
    */
    int  DateIsValid   ( const xbString & Date8 ) const
         { return DateIsValid( (const char *) Date8 ); };
    
    xbString& LastDayOfMonth( const char *Date8 );
    //! Short description.
    /*!
    */
    xbString& LastDayOfMonth( const xbString & Date8 )
         { return LastDayOfMonth((const char *) Date8 ); };
    //! Short description.
    /*!
    */
    xbString& LastDayOfMonth()
         { return LastDayOfMonth((const char *) cDate8 ); };

    xbString& Sysdate   ();
    xbString& JulToDate8( long );

    //! Short description.
    /*!
    */
    xbString& FormatCTODdate( const char * indate );

    //! Short description.
    /*!
    */
    xbString& FormatDate( const char *Format, const char *Date8 );
    //! Short description.
    /*!
    */
    xbString& FormatDate( const xbString &Format, const char *Date8 )
     { return FormatDate((const char *) Format, Date8 ); };
    //! Short description.
    /*!
    */
    xbString& FormatDate( const char *Format, const xbString &Date8 )
     { return FormatDate( Format, (const char *) Date8 ); };
    //! Short description.
    /*!
    */
    xbString& FormatDate( const xbString &Format, const xbString &Date8 )
     { return FormatDate((const char *) Format,(const char *) Date8 ); };
    //! Short description.
    /*!
    */
    xbString& FormatDate( const char *Format )
     { return FormatDate( (const char *) Format, (const char *) cDate8 ); };
    //! Short description.
    /*!
    */
    xbString& FormatDate( const xbString &Format )
     { return FormatDate((const char *) Format, (const char *) cDate8 ); };
    
    xbString& CharDayOf ( const char *Date8 );
    //! Short description.
    /*!
    */
    xbString& CharDayOf ( const xbString &Date8 )
      { return CharDayOf((const char *) Date8 ); };
    //! Short description.
    /*!
    */
    xbString& CharDayOf ()
      { return CharDayOf((const char *) cDate8 ); };

    xbString& CharMonthOf ( const char *Date8 );
    //! Short description.
    /*!
    */
    xbString& CharMonthOf ( const xbString &Date8 )
      { return CharMonthOf(( const char *) Date8 ); };
    //! Short description.
    /*!
    */
    xbString& CharMonthOf ()
      { return CharMonthOf(( const char *) cDate8 ); };

    xbString &operator+=( int );
    xbString &operator-=( int );
    xbString &operator++( int );              /* post increment */
    xbString &operator--( int );              /* post increment */
    xbString &operator+ ( int );
    xbString &operator- ( int );
    long operator-( const xbDate & ) const;
    int operator==( const xbDate & ) const;
    int operator!=( const xbDate & ) const;
    int operator< ( const xbDate & ) const;
    int operator> ( const xbDate & ) const;
    int operator<=( const xbDate & ) const;
    int operator>=( const xbDate & ) const;

  protected:
    void SetDateTables();
    xbString cDate8;  /* CCYYMMDD date format */
    xbString fDate;   /* other date format    */
    static int AggregatedDaysInMonths[2][13];
    static int DaysInMonths[2][13];
};    

#endif    // __XB_XBDATE_H__