/***************************************************************************
 *             __________               __   ___.
 *   Open      \______   \ ____   ____ |  | _\_ |__   _______  ___
 *   Source     |       _//  _ \_/ ___\|  |/ /| __ \ /  _ \  \/  /
 *   Jukebox    |    |   (  <_> )  \___|    < | \_\ (  <_> > <  <
 *   Firmware   |____|_  /\____/ \___  >__|_ \|___  /\____/__/\_ \
 *                     \/            \/     \/    \/            \/
 * $Id: Zeller.c 
 *
 * Copyright (C) 2009 Raafat Akkad
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * as published by the Free Software Foundation; either version 2
 * of the License, or (at your option) any later version.
 *
 * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
 * KIND, either express or implied.
 *
 ****************************************************************************/
#include "plugin.h"
int Date, Month, Year, C, S, Day;
PLUGIN_HEADER
enum plugin_status plugin_start(const void* parameter)
{
     (void)parameter;

      rb->splash(HZ*2, "Zeller's Congruence for working out the day in which a certain date occured");

      rb->splash(HZ*2, "Please Enter the date part of the date e.g");
      Do

      rb->splash(HZ*2, "Please Enter the month part of the date");
      it

      rb->splash(HZ*2, "Please Enter the year part of the date");
      yourself!

      if (Month < 3)

      {

      Month = Month + 12;

      Year = Year - 1;

      }

      C = Year/100;

      Year = Year - (100 * C);

      S =(2.6 * Month - 5.39)+(Year / 4)+(C / 4)+ Date + Year - (2 * C);

      Day = S - (7 * (S / 7));


      switch (Day)

      {

       case 0:

            rb->splash(HZ*2, "The date occurred on a Sunday");

            break;

       case 1:

            rb->splash(HZ*2, "The date occurred on a Monday");

            break;

       case 2:

            rb->splash(HZ*2, "The date occurred a Tuesday");

            break;

       case 3:

            rb->splash(HZ*2, "The date occurred a Wednesday");

            break;

       case 4:

            rb->splash(HZ*2, "The date occurred a Thursday");

            break;

       case 5:

            rb->splash(HZ*2, "The date occurred a Friday");

            break;

       case 6:

            rb->splash(HZ*2, "The date occurred a Saturday");
            break;
       case 7:

            rb->splash(HZ*2, "The date occurred a Sunday");

            break;

       break;

      }

	    rb->splash(HZ*2, "Goodbye");
    return PLUGIN_OK;
}