CommandOption_example_1.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
//  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.
//
//==============================================================================
#include <iostream>
#include <fstream>
#include <BasicFramework.hpp>
 
using namespace std;
using namespace gnsstk;
 
// Given that Doxygen removes Doxygen comments when rendering
// examples, please do not consider the absence of comments in the
// HTML rendering to be representative.  Refer to the file in the
// depot instead.
 
// Interesting examples:
// CommandOption1  -f CPackConfig.cmake --scream foo bar baz
 
class CommandOption1Example : public BasicFramework
{
public:
   CommandOption1Example(const string& applName);
   bool initialize(int argc, char *argv[], bool pretty = true) noexcept override;
   void process() override;
   void shutDown() override;
   CommandOptionWithAnyArg fileOpt;
   CommandOptionNoArg screamOpt;
   CommandOptionRest restOpt;
};
 
 
CommandOption1Example ::
CommandOption1Example(const string& applName)
      : BasicFramework(applName, "Example application for CommandOption"),
        fileOpt('f', "file", "input file", true),
        screamOpt(0, "scream", "print a message very loudly"),
        restOpt("FILE [...]", true)
{
   fileOpt.setMaxCount(1);
}
 
 
bool CommandOption1Example ::
initialize(int argc, char *argv[], bool pretty) noexcept
{
   if (!BasicFramework::initialize(argc, argv, pretty))
      return false;
      // fileOpt is required and thus no checking need be done.  We
      // can just get the first argument.  If there was no argument or
      // too many instances of fileOpt specified, the above check will
      // have returned false already.
   ifstream fs(fileOpt.getValue()[0].c_str());
   if (!fs)
   {
         // print an error message for the intended file
      std::perror(fileOpt.getValue()[0].c_str());
         // pretty safe to assume it's that the file doesn't exist
      exitCode = BasicFramework::EXIST_ERROR;
         // We're done.  Stop the program.
      return false;
   }
   if (screamOpt)
      cout << "HELLO WORLD" << endl;
   const vector<string>& restVec = restOpt.getValue();
   cout << "Remaining values:" << endl;
   for (unsigned i = 0; i < restVec.size(); i++)
   {
      cout << "  #" << i << " = " << restVec[i] << endl;
   }
   return true;
}
 
 
void CommandOption1Example ::
process()
{
   cout << "Nothing to process" << endl;
}
 
 
void CommandOption1Example ::
shutDown()
{
   cout << "Shutting down" << endl;
}
 
 
int main(int argc, char *argv[])
{
   try
   {
      CommandOption1Example app(argv[0]);
      if (app.initialize(argc, argv))
      {
         app.run();
      }
      return app.exitCode;
   }
   catch (gnsstk::Exception& e)
   {
      cerr << e << endl;
   }
   catch (std::exception& e)
   {
      cerr << e.what() << endl;
   }
   catch (...)
   {
      cerr << "Caught unknown exception" << endl;
   }
   return gnsstk::BasicFramework::EXCEPTION_ERROR;
}