Time.h

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/*
 * Time.h
 *
 * Smalltalk like class library for C++
 * Time manipulation. Header.
 *
 * Copyright (c) 2005 Milan Cermak
 */
/*
 * This library 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 2.1 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
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser 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
 */
#ifndef __TIME_H
#define __TIME_H

#include <stlib/Object.h>

namespace Core {

class String;
class Stream;

class Time : public Object
{
  protected:
    unsigned long _hours;
    unsigned char _minutes;
    unsigned char _seconds;
    unsigned short _milliseconds;

  public:
    Time(int hour = 0, int minute = 0, int second = 0, int milli = 0);

    /* Class-accessing protocol */
    virtual String *className(void) const;

    /* Instance creating protocol */
    static Time *now();
    static Time *midnight();
    static Time *zero();

    /* Accessing protocol */
    virtual int hour(void) const;
    virtual int minute(void) const;
    virtual int second(void) const;
    virtual int millisecond(void) const;

    /* Arithmetics protocol */
    virtual Time *addHours(int hours);

    virtual Time *addMinutes(int minutes);

    virtual Time *addSeconds(int seconds);

    virtual Time *addMilliseconds(int millis);

    virtual Time *subtractHours(int hours);
    virtual Time *subtractMinutes(int minutes);
    virtual Time *subtractSeconds(int seconds);
    virtual Time *subtractMilliseconds(int millis);

    virtual Time *differenceFrom(Time *time);

    /* Comparing protocol */
    virtual long hash(void) const;
    virtual bool isEqual(const Object *object) const;
    virtual bool isEqual(const Object &object) const
      { return Object::isEqual(object); }

    /* Converting protocol */
    virtual unsigned long asMilliseconds(void) const;

    /* Printing protocol */
    virtual void printOn(Stream *stream) const;
};

};

#endif /* __TIME_H */

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