/***************************************************************************
 *
 * 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.
*/

//IMPLEMENT_DYNAMIC( DBT, RESPONSE )

DBT::DBT()
{
    Mnemonic = _T( "DBT" );
    Empty();
}

DBT::~DBT()
{
    Mnemonic.Empty();
    Empty();
}

void DBT::Empty( void )
{
//   ASSERT_VALID( this );

    DepthFeet    = 0.0;
    DepthMeters  = 0.0;
    DepthFathoms = 0.0;
}

bool DBT::Parse( const SENTENCE& sentence )
{
//   ASSERT_VALID( this );

    /*
    ** DBT - Depth below transducer
    **
    **        1   2 3   4 5   6 7
    **        |   | |   | |   | |
    ** $--DBT,x.x,f,x.x,M,x.x,F*hh<CR><LF>
    **
    ** Field Number:
    **  1) Depth, feet
    **  2) f = feet
    **  3) Depth, meters
    **  4) M = meters
    **  5) Depth, Fathoms
    **  6) F = Fathoms
    **  7) Checksum
    */

    /*
    ** First we check the checksum...
    */

    if ( sentence.IsChecksumBad( 7 ) == TRUE )
    {
        SetErrorMessage( _T( "Invalid Checksum" ) );
        return ( FALSE );
    }

    DepthFeet    = sentence.Double( 1 );
    DepthMeters  = sentence.Double( 3 );
    DepthFathoms = sentence.Double( 5 );

    return ( TRUE );
}

bool DBT::Write( SENTENCE& sentence )
{
//   ASSERT_VALID( this );

    /*
    ** Let the parent do its thing
    */

    RESPONSE::Write( sentence );

    sentence += DepthFeet;
    sentence += _T( "f" );
    sentence += DepthMeters;
    sentence += _T( "M" );
    sentence += DepthFathoms;
    sentence += _T( "F" );

    sentence.Finish();

    return ( TRUE );
}

const DBT& DBT::operator = ( const DBT& source )
{
    //ASSERT_VALID( this );

    DepthFeet    = source.DepthFeet;
    DepthMeters  = source.DepthMeters;
    DepthFathoms = source.DepthFathoms;

    return ( *this );
}
