DateTime.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_DateTime_hxx
#define __ccxx_DateTime_hxx

#include <commonc++/Common.h++>
#include <commonc++/Date.h++>
#include <commonc++/String.h++>
#include <commonc++/Time.h++>
#include <commonc++/TimeSpan.h++>

namespace ccxx {

class COMMONCPP_API DateTime : public Date, public Time
{
 public:

  DateTime(time_s_t time);

  DateTime(time_ms_t time = 0);

  DateTime(uint_t day, uint_t month, uint_t year, uint_t hour = 0,
           uint_t minute = 0, uint_t second = 0, uint_t msec = 0);

  DateTime(const Date& date, const Time& time);

  DateTime(const Date& date);

  DateTime(const Time& time);

  DateTime(const DateTime& other);

  virtual ~DateTime();

  DateTime& normalize();

  operator time_s_t() const;

  operator time_ms_t() const;

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

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

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

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

  DateTime& operator=(time_s_t other);
  DateTime& operator=(time_ms_t other);
  DateTime& operator=(const DateTime& other);

  inline void setTime(uint_t hour, uint_t minute, uint_t second = 0,
                      uint_t msec = 0)
  { Time::setTime(hour, minute, second, msec); }

  inline void setDate(uint_t day, uint_t month, uint_t year)
  { Date::setDate(day, month, year); }

  DateTime& setDate(const Date& other);

  DateTime& setTime(const Time& other);

  DateTime& operator+=(const TimeSpan& span);

  DateTime& operator-=(const TimeSpan& span);

  static bool isDSTActive();

  static int getGMTOffset();

  static String getTimeZone();
};

inline const TimeSpan operator-(const DateTime& d1, const DateTime& d2)
{
  time_ms_t t1 = d1;
  time_ms_t t2 = d2;
  return TimeSpan(t1 >= t2 ? t1 - t2 : t2 - t1);
}

inline const DateTime operator-(const DateTime& d, const TimeSpan& ts)
{
  DateTime tmp(d);
  tmp -= ts;
  return tmp;
}

inline const DateTime operator+(const DateTime& d, const TimeSpan& ts)
{
  DateTime tmp(d);
  tmp += ts;
  return tmp;
}

} // namespace ccxx

#endif // __ccxx_DateTime_hxx