NavMsgDataWords.hpp

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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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//  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
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//==============================================================================
 
//==============================================================================
//
//  This software was developed by Applied Research Laboratories at the
//  University of Texas at Austin, under contract to an agency or agencies
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#ifndef NAVMSGDATAWORDS_HPP
#define NAVMSGDATAWORDS_HPP
 
#include "NavMsgData.hpp"
#include <math.h>
 
namespace gnsstk
{
 
 
   template <std::size_t WordSize = 30>
   class NavMsgDataWords : public NavMsgData
   {
   public:
      uint32_t getBits(unsigned start, unsigned num) const override;
      void dump(std::ostream& s, unsigned totalBits) const override;
      uint32_t *sf;
   };
 
 
   template <std::size_t WordSize>
   uint32_t NavMsgDataWords<WordSize> ::
   getBits(unsigned start, unsigned num) const
   {
      if (num == 0)
         return 0;
         // mask and shift the desired bits
      uint32_t fbmodN = (start % WordSize);
      return ((sf[start/WordSize] & (((uint32_t)-1) >> (fbmodN+1))) >>
              (31-fbmodN-num));
   }
 
 
   template <std::size_t WordSize>
   void NavMsgDataWords<WordSize> ::
   dump(std::ostream& s, unsigned totalBits) const
   {
      unsigned numWords = ceil((double)totalBits / (double)WordSize);
      s << std::hex << std::setfill('0');
      for (unsigned j=0;j<numWords;j++)
      {
         s << "0x" << std::setw(8) << sf[j] << " ";
      }
      s << std::dec << std::setfill(' ') << " ";
   }
 
} // namespace gnsstk
 
#endif // NAVMSGDATAWORDS_HPP