Date.h++

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/* ---------------------------------------------------------------------------
   commonc++ - A C++ Common Class Library
   Copyright (C) 2005-2014  Mark A Lindner

   This file is part of commonc++.

   This library is free software; you can redistribute it and/or
   modify it under the terms of the GNU Library General Public
   License as published by the Free Software Foundation; either
   version 2 of the License, or (at your option) any later version.

   This library 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
   Library General Public License for more details.

   You should have received a copy of the GNU Library General Public
   License along with this library; if not, write to the Free
   Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
   ---------------------------------------------------------------------------
*/

#ifndef __ccxx_Date_hxx
#define __ccxx_Date_hxx

#include <commonc++/Common.h++>

namespace ccxx {

class COMMONCPP_API Date
{
 public:

  static const uint_t JAN;
  static const uint_t FEB;
  static const uint_t MAR;
  static const uint_t APR;
  static const uint_t MAY;
  static const uint_t JUN;
  static const uint_t JUL;
  static const uint_t AUG;
  static const uint_t SEP;
  static const uint_t OCT;
  static const uint_t NOV;
  static const uint_t DEC;

  enum Weekday { Invalid = 0, Monday, Tuesday, Wednesday, Thursday, Friday,
                 Saturday, Sunday };

  Date();

  Date(uint_t day, uint_t month, uint_t year);

  Date(const Date& other);

  virtual ~Date();

  void setMonth(uint_t month);

  void setDay(uint_t day);

  void setYear(uint_t year);

  void setDate(uint_t day, uint_t month, uint_t year);

  inline uint_t getMonth() const
  { return(_month); }

  inline uint_t getDay() const
  { return(_day); }

  inline uint_t getYear() const
  { return(_year); }

  Weekday getWeekday() const;

  uint_t getDayOfYear() const;

  static bool isLeapYear(uint_t year);

  uint_t getWeekOfYear() const;

  bool isValid() const;

  bool operator==(const Date& other) const;
  bool operator<(const Date& other) const;
  bool operator<=(const Date& other) const;

  inline bool operator!=(const Date& other) const
  { return(! operator==(other)); }

  inline bool operator>(const Date& other) const
  { return(! operator<=(other)); }

  inline bool operator>=(const Date& other) const
  { return(! operator<(other)); }

  Date& operator=(const Date& other);

 protected:

  uint_t _year;
  uint_t _month;
  uint_t _day;
  mutable Weekday _wday;
  mutable uint_t _yday;
  mutable int _wnum;
 private:

  void _recalculate() const;
};

} // namespace ccxx

#endif // __ccxx_Date_hxx