rsd.cpp

来自「提取各种NEMA0183格式数据的类编程。」· C++ 代码 · 共 188 行

/*
** Author: Samuel R. Blackburn
** Internet: [e-mail]
**
** 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: rsd.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

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

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

void RSD::Empty( void )
{
   Data1.Empty();
   Data2.Empty();
   CursorRangeFromOwnShip                = 0.0;
   CursorBearingDegreesClockwiseFromZero = 0.0;
   RangeScale                            = 0.0;
   RangeUnits.Empty();
   DisplayRotation                       = RotationUnknown;
}

BOOL RSD::Parse( const SENTENCE& sentence )
{
   /*
   ** RSD - RADAR System Data
   **                                                        14
   **        1   2   3   4   5   6   7   8   9   10  11 12 13|
   **        |   |   |   |   |   |   |   |   |   |   |   | | |
   ** $--RSD,x.x,x.x,x.x,x.x,x.x,x.x,x.x,x.x,x.x,x.x,x.x,a,a*hh<CR><LF>
   **
   ** 14) Checksum
   */

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

   const NMEA0183_BOOLEAN checksum_is_bad = sentence.IsChecksumBad();

   if ( checksum_is_bad == True )
   {
      InvalidChecksum();
      return( FALSE );
   } 

   Data1.Parse( 1, sentence );
   Data2.Parse( 5, sentence );
   CursorRangeFromOwnShip                = sentence.Double( 9 );
   CursorBearingDegreesClockwiseFromZero = sentence.Double( 10 );
   RangeScale                            = sentence.Double( 11 );
   RangeUnits                            = sentence.Field( 12 );

   int temp_integer = sentence.Integer( 13 );

   switch( temp_integer )
   {
      case 'C':

         DisplayRotation = CourseUpRotation;
         break;

      case 'H':

         DisplayRotation = HeadUpRotation;
         break;

      case 'N':

         DisplayRotation = NorthUpRotation;
         break;

      default:

         DisplayRotation = RotationUnknown;
         break;
   }

   return( TRUE );
}

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

   Data1.Write( sentence );
   Data2.Write( sentence );
   sentence += CursorRangeFromOwnShip;
   sentence += CursorBearingDegreesClockwiseFromZero;
   sentence += RangeScale;
   sentence += RangeUnits;

   switch( DisplayRotation )
   {
      case CourseUpRotation:

         sentence += TEXT( "C" );
         break;

      case HeadUpRotation:

         sentence += TEXT( "H" );
         break;

      case NorthUpRotation:

         sentence += TEXT( "N" );
         break;

      default:

         sentence += TEXT( "" );
         break;
   }

   sentence.Finish();

   return( TRUE );
}

const RSD& RSD::operator = ( const RSD& source )
{
   Data1                                 = source.Data1;
   Data2                                 = source.Data2;
   CursorRangeFromOwnShip                = source.CursorRangeFromOwnShip;
   CursorBearingDegreesClockwiseFromZero = source.CursorBearingDegreesClockwiseFromZero;
   RangeScale                            = source.RangeScale;
   RangeUnits                            = source.RangeUnits;
   DisplayRotation                       = source.DisplayRotation;

   return( *this );
}