RhodeCode

/* -*- C++ -*-

 *

 * This file is a part of LEMON, a generic C++ optimization library

 *

 * Copyright (C) 2003-2008

 * Egervary Jeno Kombinatorikus Optimalizalasi Kutatocsoport

 * (Egervary Research Group on Combinatorial Optimization, EGRES).

 *

 * Permission to use, modify and distribute this software is granted

 * provided that this copyright notice appears in all copies. For

 * precise terms see the accompanying LICENSE file.

 *

 * This software is provided "AS IS" with no warranty of any kind,

 * express or implied, and with no claim as to its suitability for any

 * purpose.

 *

 */

///\ingroup demos

///\file

///\brief Argument parser demo

///

///

#include <lemon/arg_parser.h>

using namespace lemon;

int main(int argc, const char **argv)

{

  ArgParser ap(argc,argv);

  int i;

  std::string s;

  double d;

  bool b,sil;

  bool g1,g2,g3;

    .synonym("vals","val")

    .refOption("nohelp", "", sil)

    .optionGroup("gr","gra")

    .optionGroup("gr","grb")

    .optionGroup("gr","grc")

    .mandatoryGroup("gr")

    .onlyOneGroup("gr")

    .other("...");

  ap.parse();

  std::cout << "Parameters of '" << ap.commandName() << "':\n";

  if(ap.given("n")) std::cout << "  Value of -n: " << i << std::endl;

  if(ap.given("val")) std::cout << "  Value of -val: " << d << std::endl;

  if(ap.given("name")) std::cout << "  Value of -name: " << s << std::endl;

  if(ap.given("f")) std::cout << "  -f is given\n";

  if(ap.given("nohelp")) std::cout << "  Value of -nohelp: " << sil << std::endl;

  switch(ap.files().size()) {

  case 0:

    std::cout << "  No file argument was given.\n";

    break;

  case 1:

    std::cout << "  1 file argument was given. It is:\n";

    break;

  default:

    std::cout << "  "

	      << ap.files().size() << " file arguments were given. They are:\n";

  }

  for(unsigned int i=0;i<ap.files().size();++i)

    std::cout << "    '" << ap.files()[i] << "'\n";

}

	case DOUBLE:

	  delete i->second.double_p;

	  break;

	case INTEGER:

	  delete i->second.int_p;

	  break;

	case UNKNOWN:

	  break;

	case FUNC:

	  break;

	}

  }

  ArgParser &ArgParser::intOption(const std::string &name,

			       const std::string &help,

			       int value, bool obl)

  {

    ParData p;

    p.int_p=new int(value);

    p.self_delete=true;

    p.help=help;

    p.type=INTEGER;

    p.mandatory=obl;

    _opts[name]=p;

    return *this;

  }

  ArgParser &ArgParser::doubleOption(const std::string &name,

			       const std::string &help,

			       double value, bool obl)

  {

    ParData p;

    p.double_p=new double(value);

    p.self_delete=true;

    p.help=help;

    p.type=DOUBLE;

    p.mandatory=obl;

    _opts[name]=p;

    return *this;

  }

  ArgParser &ArgParser::boolOption(const std::string &name,

			       const std::string &help,

			       bool value, bool obl)

  {

    ParData p;

    p.bool_p=new bool(value);

    p.self_delete=true;

    p.help=help;

    p.type=BOOL;

    p.mandatory=obl;

    _opts[name]=p;

    return *this;

  }

  ArgParser &ArgParser::stringOption(const std::string &name,

			       const std::string &help,

			       std::string value, bool obl)

  {

    ParData p;

    p.string_p=new std::string(value);

    p.self_delete=true;

    p.help=help;

    p.type=STRING;

    p.mandatory=obl;

    _opts[name]=p;

    return *this;

  }

  ArgParser &ArgParser::refOption(const std::string &name,

			       const std::string &help,

			       int &ref, bool obl)

  {

    ParData p;

    p.int_p=&ref;

    p.self_delete=false;

 * Permission to use, modify and distribute this software is granted

 * provided that this copyright notice appears in all copies. For

 * precise terms see the accompanying LICENSE file.

 *

 * This software is provided "AS IS" with no warranty of any kind,

 * express or implied, and with no claim as to its suitability for any

 * purpose.

 *

 */

#ifndef LEMON_ARG_PARSER

#define LEMON_ARG_PARSER

#include <vector>

#include <map>

#include <list>

#include <string>

#include <iostream>

#include <sstream>

#include <algorithm>

#include <lemon/error.h>

///\ingroup misc

///\file

namespace lemon {

  ///Command line arguments parser

  ///\ingroup misc

  ///

  class ArgParser {

    static void _showHelp(void *p);

  protected:

    int _argc;

    const char **_argv;

    enum OptType { UNKNOWN=0, BOOL=1, STRING=2, DOUBLE=3, INTEGER=4, FUNC=5 };

    class ParData {

    public:

      union {

	bool *bool_p;

	int *int_p;

	double *double_p;

	std::string *string_p;

	struct {

	  void (*p)(void *);

	  void *data;

	} func_p;

      };

      std::string help;

		      const std::string &help,

		      double value=0, bool obl=false);

    ///Add a new bool type option

    ///\param name The name of the option. The leading '-' must be omitted.

    ///\param help A help string.

    ///\retval value The value of the argument will be written to this variable.

    ///\param obl Indicate if the option is mandatory.

    ////\note A mandatory bool obtion is of very little use.)

    ArgParser &boolOption(const std::string &name,

		      const std::string &help,

		      bool value=false, bool obl=false);

    ///Add a new string type option

    ///\param name The name of the option. The leading '-' must be omitted.

    ///\param help A help string.

    ///\retval value The value of the argument will be written to this variable.

    ///\param obl Indicate if the option is mandatory.

    ArgParser &stringOption(const std::string &name,

		      const std::string &help,

		      std::string value="", bool obl=false);

    ///Using this functions, the value of the option will be directly written

    ///into a variable once the option appears in the command line.

    ///@{

    ///Add a new integer type option with a storage reference

    ///\param name The name of the option. The leading '-' must be omitted.

    ///\param help A help string.

    ///\retval ref The value of the argument will be written to this variable.

    ///\param obl Indicate if the option is mandatory.

    ArgParser &refOption(const std::string &name,

		    const std::string &help,

		    int &ref, bool obl=false);

    ///Add a new floating type option with a storage reference

    ///\param name The name of the option. The leading '-' must be omitted.

    ///\param help A help string.

    ///\retval ref The value of the argument will be written to this variable.

    ///\param obl Indicate if the option is mandatory.

    ArgParser &refOption(const std::string &name,

		      const std::string &help,

		      double &ref, bool obl=false);

    ArgParser &refOption(const std::string &name,

		      const std::string &help,

		      bool &ref, bool obl=false);

    ///Add a new string type option with a storage reference

    ///\param name The name of the option. The leading '-' must be omitted.

    ///\param help A help string.

    ///\retval ref The value of the argument will be written to this variable.

    ///\param obl Indicate if the option is mandatory.

    ArgParser &refOption(const std::string &name,

		      const std::string &help,

		      std::string &ref, bool obl=false);

    ///@}

    ///\name Option Groups and Synonyms

    ///

    ///@{

    ///Boundle some options into a group

    /// You can group some option by calling this function repeatedly for each

    ArgParser &optionGroup(const std::string &group,

			   const std::string &opt);

    ///Make the members of a group exclusive

    ///If you call this function for a group, than at most one of them can be

    ///given at the same time

    ArgParser &onlyOneGroup(const std::string &group);

    ///Make a group mandatory

    ///Using this function, at least one of the members of \c group

    ///must be given.

    ArgParser &mandatoryGroup(const std::string &group);

    ///Create synonym to an option

    ///option \c opt.

    ArgParser &synonym(const std::string &syn,

			   const std::string &opt);

    ///@}

    ///Give help string for non-parsed arguments.

    ///With this function you can give help string for non-parsed arguments.

    ///\c help gives a more detailed description.

    ArgParser &other(const std::string &name,

		     const std::string &help="");

    ///not starting with a '-' character.

    std::vector<std::string> &files() { return _file_args; }

    ///Give back the command name (the 0th argument)

    const std::string &commandName() { return _command_name; }

    void show(std::ostream &os,Opts::iterator i);

    void show(std::ostream &os,Groups::iterator i);

    void showHelp(Opts::iterator i);

    void showHelp(std::vector<OtherArg>::iterator i);

    void shortHelp();

    void showHelp();

    void unknownOpt(std::string arg);

    void requiresValue(std::string arg, OptType t);

    void checkMandatories();

    ///Start the parsing process

    ArgParser &parse();

    /// Synonym for parse()

    ArgParser &run() 

    {

      return parse();

    }

    ///Check if an opion has been given to the command.

    bool given(std::string op) 

    {

      Opts::iterator i = _opts.find(op);

      return i!=_opts.end()?i->second.set:false;

    }

    ///Magic type for operator[]

    ///This is the type of the return value of ArgParser::operator[]().

    class RefType 

    {

      ArgParser &_parser;

      std::string _name;

    public:

      ///\e

      RefType(ArgParser &p,const std::string &n) :_parser(p),_name(n) {}

      ///\e

      operator bool() 

      {

	Opts::iterator i = _parser._opts.find(_name);

	LEMON_ASSERT(i==_parser._opts.end(),

		     std::string()+"Unkown option: '"+_name+"'");

	LEMON_ASSERT(i->second.type!=ArgParser::BOOL,

		     std::string()+"'"+_name+"' is a bool option");

	return *(i->second.bool_p);

      }

      ///\e

      operator std::string()

      {

	Opts::iterator i = _parser._opts.find(_name);

	LEMON_ASSERT(i==_parser._opts.end(),

		     std::string()+"Unkown option: '"+_name+"'");

	LEMON_ASSERT(i->second.type!=ArgParser::STRING,

	Opts::iterator i = _parser._opts.find(_name);

	LEMON_ASSERT(i==_parser._opts.end(),

		     std::string()+"Unkown option: '"+_name+"'");

	LEMON_ASSERT(i->second.type!=ArgParser::DOUBLE &&

		     i->second.type!=ArgParser::INTEGER,

		     std::string()+"'"+_name+"' is a floating point option");

	return i->second.type==ArgParser::DOUBLE ?

	  *(i->second.double_p) : *(i->second.int_p);

      }

      ///\e

      operator int() 

      {

	Opts::iterator i = _parser._opts.find(_name);

	LEMON_ASSERT(i==_parser._opts.end(),

		     std::string()+"Unkown option: '"+_name+"'");

	LEMON_ASSERT(i->second.type!=ArgParser::INTEGER,

		     std::string()+"'"+_name+"' is an integer option");

	return *(i->second.int_p);

      }

    };

    ///Give back the value of an option

    ///\sa RefType

    RefType operator[](const std::string &n)

    {

      return RefType(*this, n);

    }    

  };

}

#endif // LEMON_MAIN_PARAMS