LNavOrderFilter.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
//  by the Free Software Foundation; either version 3.0 of the License, or
//  any later version.
//
//  The GNSSTk is distributed in the hope that it will be useful,
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//  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
//  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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//==============================================================================
 
#ifndef LNAVORDERFILTER_HPP
#define LNAVORDERFILTER_HPP
 
#include "NavFilterMgr.hpp"
#include "NavFilter.hpp"
#include "LNavFilterData.hpp"
 
namespace gnsstk
{
 
 
 
   struct LNavTimeSort
      : std::binary_function<LNavFilterData*,LNavFilterData*,bool>
   {
      inline bool operator()(const LNavFilterData*const& l,
                             const LNavFilterData*const& r)
         const;
   };
 
   class LNavOrderFilter : public NavFilter
   {
   public:
      unsigned epochInSeconds;
 
      LNavOrderFilter(unsigned depth = 3, unsigned epoch = 6);
 
      virtual void validate(NavMsgList& msgBitsIn, NavMsgList& msgBitsOut);
 
      virtual void finalize(NavMsgList& msgBitsOut);
 
      virtual unsigned processingDepth() const noexcept
      { return procDepth; }
 
      virtual std::string filterName() const noexcept
      { return "Order"; }
 
      unsigned procDepth;
 
   protected:
      typedef std::set<LNavFilterData*, LNavTimeSort> SubframeSet;
 
      SubframeSet orderedNav;
 
      void examineSubframes(NavMsgList& msgBitsOut);
   };
 
 
 
   bool LNavTimeSort ::
   operator()(const LNavFilterData*const& l, const LNavFilterData*const& r)
      const
   {
      if (l->timeStamp < r->timeStamp)
         return true;
      if (l->timeStamp > r->timeStamp)
         return false;
      return (l < r);
   }
 
} // namespace gnsstk
 
#endif // LNAVORDERFILTER_HPP