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cmdline_parser.hh

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/*
 *  File:       cucu.c
 *              $Id: cmdline_parser.hh,v 1.3 2002/06/26 20:46:03 alec Exp $
 *
 *  Author:     Alec Panoviciu (alecu@email.com)
 *
 *  Comments:
 *
 *  Revision history:
 *
 *  $Log: cmdline_parser.hh,v $
 *  Revision 1.3  2002/06/26 20:46:03  alec
 *  g++ 3.x happy
 *
 *  Revision 1.2  2002/04/29 09:34:10  alec
 *  scanner ptree building compiles
 *
 */

/* 
  Copyright (C) 2002 Alexandru Panoviciu (alecu@email.com)

  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., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA

 */


#ifndef __CMDLINE_PARSER_HH__
#define __CMDLINE_PARSER_HH__

#include <iostream>
#include <string>
#include <vector>
using namespace std;

#include "prop_registry.hh"
#include "debug.h"


class CmdLineParseException : public exception
{
public:
  CmdLineParseException (const string &message_) :
    message(message_)
  {}
  
  CmdLineParseException () :
    message("Command Line Parse Exception")
  {}
  
  virtual const char* what() const throw()
  {
    return message.c_str();
  }

  virtual operator string() const
  {
    return message;
  }

  ~CmdLineParseException () throw ()
  {}
  
protected:
  
  string message;
  
};

inline ostream& operator << (ostream& os, CmdLineParseException &ex)
{
  return os << ex.what();
}


class CmdLineParser
{

  typedef struct t_CmdLineAtom
  {
    enum {k_string, k_bool, k_int, k_float} tag;
    bool multi;
    bool optional;
    string sOpt;
    string lOpt;
    string prop;
    string description;

    t_CmdLineAtom (const string &tag_, bool multi_, bool optional,
                   const string &sOpt_, const string &lOpt_,
                   const string &prop_, const string &description_) :
      multi(multi_), sOpt(sOpt_), lOpt(lOpt_),
      prop(prop_), description(description_)
    {
      if (tag_ == "s") tag = k_string;
      else if (tag_ == "b") tag = k_bool;
      else if (tag_ == "i") tag = k_int;
      else if (tag_ == "f") tag = k_float;
      else ASSERT(0, "bad tag string, should be \"s\"/\"b\"/\"i\"/\"f\"");
      ASSERT((sOpt != "") || (lOpt != ""),
             "both long and short option strings are empty");
    }

    operator string () const;

    ostream& dumpDescription (ostream &os) const;
    
  } CmdLineAtom;
  
public:

  CmdLineParser (const string &progName_, PropRegistry &pr_) :
    progName(progName_), pr(pr_)
  {}

  int parse (int argc, char *argv[]) throw (CmdLineParseException);


  CmdLineParser& add (const CmdLineAtom &atom)
  {
    desc.push_back(atom);
    return *this;
  }

  CmdLineParser& add (const string &tag, bool multi, bool optional,
                      const string &sOpt, const string &lOpt,
                      const string &prop, const string &description)
  {
    return add(CmdLineAtom(tag, multi, optional, sOpt, lOpt,
                           prop, description));
  }

  void printUsage (ostream &os);
  
private:

  PropRegistry &pr;

  vector<CmdLineAtom> desc;

  string progName;
};

#endif /* #ifndef __CMDLINE_PARSER_HH__ */

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