/*
** Author: Samuel R. Blackburn
** Internet: wfc@pobox.com
**
** Copyright, 1996-2005, Samuel R. Blackburn
**
** "You can get credit for something or get it done, but not both."
** Dr. Richard Garwin
**
** BSD License follows.
**
** Redistribution and use in source and binary forms, with or without
** modification, are permitted provided that the following conditions
** are met:
**
** Redistributions of source code must retain the above copyright notice,
** this list of conditions and the following disclaimer. Redistributions
** in binary form must reproduce the above copyright notice, this list
** of conditions and the following disclaimer in the documentation and/or
** other materials provided with the distribution. Neither the name of
** the WFC nor the names of its contributors may be used to endorse or
** promote products derived from this software without specific prior
** written permission.
**
** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
**
** $Workfile: rma.cpp $
** $Revision: 4 $
** $Modtime: 10/10/98 2:43p $
*/

#include "nmea0183.h"
#pragma hdrstop

#if defined( _DEBUG ) && defined( _INC_CRTDBG )
#undef THIS_FILE
static char THIS_FILE[] = __FILE__;
#define new DEBUG_NEW
#endif // _DEBUG

RMA::RMA()
{
   Mnemonic = TEXT( "RMA" );
   Empty();
}

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

void RMA::Empty( void )
{
   IsDataValid                = NMEA_Unknown;
   TimeDifferenceA            = 0.0;
   TimeDifferenceB            = 0.0;
   SpeedOverGroundKnots       = 0.0;
   TrackMadeGoodDegreesTrue   = 0.0;
   MagneticVariation          = 0.0;
   MagneticVariationDirection = EW_Unknown;
   FAAMode                    = FAAModeUnknown;
}

BOOL RMA::Parse( const SENTENCE& sentence )
{
   /*
   ** RMA - Recommended Minimum Navigation Information
   **                                                    12
   **        1 2       3 4        5 6   7   8   9   10  11|
   **        | |       | |        | |   |   |   |   |   | |
   ** $--RMA,A,llll.ll,a,yyyyy.yy,a,x.x,x.x,x.x,x.x,x.x,a*hh<CR><LF>
   **
   ** Field Number: 
   **  1) Blink Warning
   **  2) Latitude
   **  3) N or S
   **  4) Longitude
   **  5) E or W
   **  6) Time Difference A, uS
   **  7) Time Difference B, uS
   **  8) Speed Over Ground, Knots
   **  9) Track Made Good, degrees true
   ** 10) Magnetic Variation, degrees
   ** 11) E or W
   ** 12) Checksum
   */

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

   const NMEA0183_BOOLEAN checksum_is_bad = sentence.IsChecksumBad();

   if ( checksum_is_bad == True )
   {
      InvalidChecksum();
      return( FALSE );
   }
   
   IsDataValid                = sentence.Boolean( 1 );
   Position.Parse( 2, 3, 4, 5, sentence );
   TimeDifferenceA            = sentence.Double( 6 );
   TimeDifferenceB            = sentence.Double( 7 );
   SpeedOverGroundKnots       = sentence.Double( 8 );
   TrackMadeGoodDegreesTrue   = sentence.Double( 9 );
   MagneticVariation          = sentence.Double( 10 );
   MagneticVariationDirection = sentence.EastOrWest( 11 );

   const int checksum_field_number = sentence.ChecksumFieldNumber();

   if ( checksum_field_number == 13 )
   {
      FAAMode = sentence.FAAMode( 12 );
   }
   else
   {
      FAAMode = FAAModeUnknown;
   }

   return( TRUE );
}

BOOL RMA::Write( SENTENCE& sentence )
{
   /*
   ** Let the parent do its thing
   */
   
   RESPONSE::Write( sentence );

   sentence += IsDataValid;
   sentence += Position;
   sentence += TimeDifferenceA;
   sentence += TimeDifferenceB;
   sentence += SpeedOverGroundKnots;
   sentence += TrackMadeGoodDegreesTrue;
   sentence += MagneticVariation;
   sentence += MagneticVariationDirection;

   sentence.Finish();

   return( TRUE );
}

const RMA& RMA::operator = ( const RMA& source )
{
   IsDataValid                = source.IsDataValid;
   Position                   = source.Position;
   TimeDifferenceA            = source.TimeDifferenceA;
   TimeDifferenceB            = source.TimeDifferenceB;
   SpeedOverGroundKnots       = source.SpeedOverGroundKnots;
   TrackMadeGoodDegreesTrue   = source.TrackMadeGoodDegreesTrue;
   MagneticVariation          = source.MagneticVariation;
   MagneticVariationDirection = source.MagneticVariationDirection;

   return( *this );
}