/***************************************************************************
 *
 * Project:  OpenCPN
 * Purpose:  NMEA0183 Support Classes
 * Author:   Samuel R. Blackburn, David S. Register
 *
 ***************************************************************************
 *   Copyright (C) 2010 by Samuel R. Blackburn, David S Register           *
 *                                                                         *
 *   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 program 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 General Public License for more details.                          *
 *                                                                         *
 *   You should have received a copy of the GNU General Public License     *
 *   along with this program; if not, write to the                         *
 *   Free Software Foundation, Inc.,                                       *
 *   51 Franklin Street, Fifth Floor, Boston, MA 02110-1301,  USA.             *
 ***************************************************************************
 *
 *   S Blackburn's original source license:                                *
 *         "You can use it any way you like."                              *
 *   More recent (2010) license statement:                                 *
 *         "It is BSD license, do with it what you will"                   *
 */


#include "nmea0183.h"

/*
** Author: Samuel R. Blackburn
** CI$: 76300,326
** Internet: sammy@sed.csc.com
**
** You can use it any way you like.
*/


LONGITUDE::LONGITUDE()
{
   Empty();
}

LONGITUDE::~LONGITUDE()
{
   Empty();
}

void LONGITUDE::Empty( void )
{

   Longitude = 0.0;
   Easting   = EW_Unknown;
}

bool LONGITUDE::IsDataValid( void )
{
   if ( Easting != East && Easting != West )
   {
      return( FALSE );
   }

   return( TRUE );
}

void LONGITUDE::Parse( int position_field_number, int east_or_west_field_number, const SENTENCE& sentence )
{
   wxString w_or_e = sentence.Field( east_or_west_field_number );
   Set( sentence.Double( position_field_number ), w_or_e );
}

void LONGITUDE::Set( double position, const wxString& east_or_west )
{
//   assert( east_or_west != NULL );

   Longitude = position;
   wxString ts = east_or_west;

   if ( !ts.IsEmpty( ) && ts.Trim(false)[ 0 ] == 'E' )
   {
      Easting = East;
   }
   else if ( !ts.IsEmpty( ) && ts.Trim(false)[ 0 ] == 'W' )
   {
      Easting = West;
   }
   else
   {
      Easting = EW_Unknown;
   }
}

void LONGITUDE::Write( SENTENCE& sentence )
{

    wxString temp_string;
    int neg = 0;
    int d;
    int m;

    if (Longitude < 0.0) {
            Longitude = -Longitude;
            neg = 1;
            }
    d = (int) Longitude;
    double m0 = (Longitude - (double) d) * 60000.0;
    m = (int)wxRound(m0);
    
    if (neg)
            d = -d;

    temp_string.Printf(_T("%03d%02d.%03d"), d, m / 1000, m % 1000);

   sentence += temp_string;

   if ( Easting == East )
   {
       sentence += _T("E");
   }
   else if ( Easting == West )
   {
       sentence += _T("W");
   }
   else
   {
      /*
      ** Add Nothing
      */
   }
}

const LONGITUDE& LONGITUDE::operator = ( const LONGITUDE& source )
{

   Longitude = source.Longitude;
   Easting   = source.Easting;

   return( *this );
}
