CmdLine.hh

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// File: CmdLine.hh                                                          //
// Part of the CmdLine library
//                                                                           //
// Copyright (c) 2007 Gavin Salam                                            //
//                                                                           //
// This program is free software; you can redistribute it and/or modify      //
// it under the terms of the GNU General Public License as published by      //
// the Free Software Foundation; either version 2 of the License, or         //
// (at your option) any later version.                                       //
//                                                                           //
// This program is distributed in the hope that it will be useful,           //
// but WITHOUT ANY WARRANTY; without even the implied warranty of            //
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the             //
// GNU General Public License for more details.                              //
//                                                                           //
// You should have received a copy of the GNU General Public License         //
// along with this program; if not, write to the Free Software               //
// Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA //
//                                                                           //
// $Revision:: 470                                                          $//
// $Date:: 2007-02-20 20:20:19 +0100 (Tue, 20 Feb 2007)                     $//


#ifndef __CMDLINE__
#define __CMDLINE__

#include<string>
#include<sstream>
#include<map>
#include<vector>
using namespace std;

class CmdLine {
  mutable map<string,int> __options;
  vector<string> __arguments;
  mutable map<string,bool> __options_used;
  //string __progname;
  string __command_line;

 public :
  CmdLine() {};
  CmdLine(const int argc, char** argv);
  CmdLine(const vector<string> & args);

  bool    present(const string & opt) const;
  bool    present_and_set(const string & opt) const;

  inline const vector<string> & arguments() const {return __arguments;}

  template<class T> T value(const string & opt) const;
  template<class T> T value(const string & opt, const T & defval) const;


  int     int_val(const string & opt);
  int     int_val(const string & opt, const int & defval);

  double  double_val(const string & opt) const;
  double  double_val(const string & opt, const double & defval) const;

  string  string_val(const string & opt) const;
  string  string_val(const string & opt, const string & defval) const;

  string  command_line() const;

  bool all_options_used() const;

 private:
  void init();

  void _report_conversion_failure(const string & opt, 
                                  const string & optstring) const;


};



template<class T> T CmdLine::value(const string & opt) const {
  T result;
  string optstring = string_val(opt);
  istringstream optstream(optstring);
  optstream >> result;
  if (optstream.fail()) _report_conversion_failure(opt, optstring);
  return result;
}

template<> inline string CmdLine::value<string>(const string & opt) const {
  return string_val(opt);}



template<class T> T CmdLine::value(const string & opt, const T & defval) const {
  if (this->present_and_set(opt)) {return value<T>(opt);} 
  else {return defval;}
}

#endif

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