dateutils.h

//
//  
//    The Laxkit, a windowing toolkit
//    Please consult http://laxkit.sourceforge.net about where to send any
//    correspondence about this software.
//
//    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., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
//
//    Copyright (C) 2011 by Tom Lechner
//
#ifndef _LAX_DATEUTILS_H
#define _LAX_DATEUTILS_H

namespace Laxkit {

//---------------------------- date functions -----------------------------------------
int is_leap_year(int year);
int days_in_month(int month, int year);
int days_in_year(int year);
const char *dayofweek(int day, int lvl, int sunday);
const char *monthname(int month,int lvl);


//---------------------------- LaxDate -----------------------------------------

class LaxDate
{
  protected:
    int year,month,day;
    int dayofweek, dayofyear;
  public:
    LaxDate();
    LaxDate(int year, int month, int day);
    LaxDate(const LaxDate &d);
    LaxDate &operator=(LaxDate &d);
    int Set(int year, int month, int day);
    void SetToToday();

    //LaxDate plusDays(int days);
    //LaxDate plusWeeks(int weeks);
    //LaxDate plusMonths(int months);
    //LaxDate plusYears(int years);

    int Year() { return year; }
    int Month() { return month; }
    int Day() { return day; }
    int DayOfWeek();
    int DayOfYear();
};

int operator-(LaxDate d1,LaxDate d2); //number of days between dates
int operator<(LaxDate d1,LaxDate d2);
int operator>(LaxDate d1,LaxDate d2);
int operator<=(LaxDate d1,LaxDate d2);
int operator>=(LaxDate d1,LaxDate d2);
int operator==(LaxDate d1,LaxDate d2);

} //namespace Laxkit

#endif