SEMHeader.cpp

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//==============================================================================
//
//  This file is part of GNSSTk, the ARL:UT GNSS Toolkit.
//
//  The GNSSTk is free software; you can redistribute it and/or modify
//  it under the terms of the GNU Lesser General Public License as published
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//  any later version.
//
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//  GNU Lesser General Public License for more details.
//
//  You should have received a copy of the GNU Lesser General Public
//  License along with GNSSTk; if not, write to the Free Software Foundation,
//  Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110, USA
//
//  This software was developed by Applied Research Laboratories at the
//  University of Texas at Austin.
//  Copyright 2004-2022, The Board of Regents of The University of Texas System
//
//==============================================================================
 
//==============================================================================
//
//  This software was developed by Applied Research Laboratories at the
//  University of Texas at Austin, under contract to an agency or agencies
//  within the U.S. Department of Defense. The U.S. Government retains all
//  rights to use, duplicate, distribute, disclose, or release this software.
//
//  Pursuant to DoD Directive 523024
//
//  DISTRIBUTION STATEMENT A: This software has been approved for public
//                            release, distribution is unlimited.
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//==============================================================================
 
#include "StringUtils.hpp"
#include "GNSSconstants.hpp"
 
#include "SEMHeader.hpp"
#include "SEMStream.hpp"
 
 
using namespace gnsstk::StringUtils;
using namespace std;
 
namespace gnsstk
{
   short SEMHeader::nearFullWeek = 0;
 
   void SEMHeader::reallyPutRecord(FFStream& ffs) const
   {
      string line;
 
      SEMStream& strm = dynamic_cast<SEMStream&>(ffs);
 
      line = leftJustify(asString<short>(numRecords),2);
      line += " ";
      line += Title;
      strm << line << endl;
      line.erase();
 
      line = rightJustify(asString<short>(week),4);
      line += " ";
      line += asString<long>(Toa);
      strm << line << endl;
      line.erase();
 
   }   // end SEMAHeader::reallyPutRecord
 
 
   void SEMHeader::reallyGetRecord(FFStream& ffs)
   {
      string line;
 
      SEMStream& strm = dynamic_cast<SEMStream&>(ffs);
 
      //Grab the first line
      strm.formattedGetLine(line);
      if (line.find_first_not_of("abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ01234567890_ .-+") != std::string::npos ||
          line.length() < 4 || line.length() > 28)
      {
         FFStreamError fe("Invalid data");
         GNSSTK_THROW(fe);
      }
 
      numRecords = (short) asInt(line.substr(0,2));
      Title = line.substr(3,24);
 
      //Grab the second line
      strm.formattedGetLine(line);
      if (line.find_first_not_of("abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ01234567890_ .-+") != std::string::npos ||
          line.length() < 6 || line.length() > 12)
      {
         FFStreamError fe("Invalid data");
         GNSSTK_THROW(fe);
      }
      vector<std::string> values = split(line,' ');
      if (values.size()!=2)
      {
         FFStreamError fe("Invalid data");
         GNSSTK_THROW(fe);
      }
      week = (short) asInt(values[0]);
      Toa = asInt(values[1]);
 
      if (nearFullWeek > 0)
      {
            // In case a full week is provided.
         week %= 1024;
         week += (nearFullWeek / 1024) * 1024;
         short diff = nearFullWeek - week;
         if (diff > 512)
            week += 512;
         else if(diff < -512)
            week -= 512;
      }
 
      strm.header = *this;
      strm.headerRead = true;
 
   } // end of reallyGetRecord()
 
   void SEMHeader::dump(ostream& s) const
   {
      std::cout << "numRecords = " << numRecords << std::endl;
      std::cout << "Title = " << Title << std::endl;
      std::cout << "week = " << week << std::endl;
      std::cout << "Toa = " << Toa << std::endl;
   }
 
} // namespace