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";

}

/* -*- 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.

 *

 */

#include <lemon/arg_parser.h>

namespace lemon {

  void ArgParser::_showHelp(void *p)

  {

    (static_cast<ArgParser*>(p))->showHelp();

    exit(1);

  }

  ArgParser::ArgParser(int argc, const char **argv) :_argc(argc), _argv(argv),

                                                     _command_name(argv[0]) {

    funcOption("-help","Print a short help message",_showHelp,this);

    synonym("help","-help");

    synonym("h","-help");

  }

  ArgParser::~ArgParser()

  {

    for(Opts::iterator i=_opts.begin();i!=_opts.end();++i)

      if(i->second.self_delete)

	switch(i->second.type) {

	case BOOL:

	  delete i->second.bool_p;

	  break;

	case STRING:

	  delete i->second.string_p;

	  break;

	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;

    p.help=help;

    p.type=INTEGER;

    p.mandatory=obl;

    _opts[name]=p;

    return *this;

  }

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

                                  const std::string &help,

                                  double &ref, bool obl)

  {

    ParData p;

    p.double_p=&ref;

    p.self_delete=false;

    p.help=help;

    p.type=DOUBLE;

    p.mandatory=obl;

    _opts[name]=p;

    return *this;

  }

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

                                  const std::string &help,

                                  bool &ref, bool obl)

  {

    ParData p;

    p.bool_p=&ref;

    p.self_delete=false;

    p.help=help;

    p.type=BOOL;

    p.mandatory=obl;

    _opts[name]=p;

    ref = false;

    return *this;

  }

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

			       const std::string &help,

			       std::string &ref, bool obl)

  {

    ParData p;

    p.string_p=&ref;

    p.self_delete=false;

    p.help=help;

    p.type=STRING;

    p.mandatory=obl;

    _opts[name]=p;

    return *this;

  }

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

			       const std::string &help,

			       void (*func)(void *),void *data)

  {

    ParData p;

    p.func_p.p=func;

    p.func_p.data=data;

    p.self_delete=false;

    p.help=help;

    p.type=FUNC;

    p.mandatory=false;

    _opts[name]=p;

    return *this;

  }

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

				    const std::string &opt)

  {

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

    LEMON_ASSERT(i!=_opts.end(), "Unknown option: '"+opt+"'");

    LEMON_ASSERT(!(i->second.ingroup), 

                 "Option already in option group: '"+opt+"'");

    GroupData &g=_groups[group];

    g.opts.push_back(opt);

    i->second.ingroup=true;

    return *this;

  }

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

  {

    GroupData &g=_groups[group];

    g.only_one=true;

    return *this;

  }

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

				const std::string &opt)

  {

    Opts::iterator o = _opts.find(opt);

    Opts::iterator s = _opts.find(syn);

    LEMON_ASSERT(o!=_opts.end(), "Unknown option: '"+opt+"'");

    LEMON_ASSERT(s==_opts.end(), "Option already used: '"+syn+"'");

    ParData p;

    p.help=opt;

    p.mandatory=false;

    p.syn=true;

    _opts[syn]=p;

    o->second.has_syn=true;

    return *this;

  }

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

  {

    GroupData &g=_groups[group];

    g.mandatory=true;

    return *this;

  }

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

			      const std::string &help)

  {

    _others_help.push_back(OtherArg(name,help));

    return *this;

  }

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

  {

    os << "-" << i->first;

    if(i->second.has_syn)

      for(Opts::iterator j=_opts.begin();j!=_opts.end();++j)

	if(j->second.syn&&j->second.help==i->first)

	  os << "|-" << j->first;

    switch(i->second.type) {

    case STRING:

      os << " str";

      break;

    case INTEGER:

      os << " int";

      break;

    case DOUBLE:

      os << " num";

      break;

    default:

      break;

    }

  }

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

  {

    GroupData::Opts::iterator o=i->second.opts.begin();

    while(o!=i->second.opts.end()) {

      show(os,_opts.find(*o));

      ++o;

      if(o!=i->second.opts.end()) os<<'|';

    }

  }

  void ArgParser::showHelp(Opts::iterator i)

  {

    if(i->second.help.size()==0||i->second.syn) return;

    std::cerr << "  ";

    show(std::cerr,i);

    std::cerr << std::endl;

    std::cerr << "     " << i->second.help << std::endl;

  }

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

  {

    if(i->help.size()==0) return;

    std::cerr << "  " << i->name << std::endl

	      << "     " << i->help << std::endl;

  }

  void ArgParser::shortHelp()

  {

    const unsigned int LINE_LEN=77;

    const std::string indent("    ");

/* -*- 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.

 *

 */

#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;

      bool mandatory;

      OptType type;

      bool set;

      bool ingroup;

      bool has_syn;

      bool syn;

      bool self_delete;

      ParData() : mandatory(false), type(UNKNOWN), set(false), ingroup(false),

		  has_syn(false), syn(false), self_delete(false) {}

    };

    typedef std::map<std::string,ParData> Opts;

    Opts _opts;

    class GroupData 

    {

    public:

      typedef std::list<std::string> Opts;

      Opts opts;

      bool only_one;

      bool mandatory;

      GroupData() :only_one(false), mandatory(false) {}

    };

    typedef std::map<std::string,GroupData> Groups;

    Groups _groups;

    struct OtherArg

    {

      std::string name;

      std::string help;

      OtherArg(std::string n, std::string h) :name(n), help(h) {}

    };

    std::vector<OtherArg> _others_help;

    std::vector<std::string> _file_args;

    std::string _command_name;

  private:

    //Bind a function to an option.

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

    //\param help A help string.

    //\retval func The function to be called when the option is given. It

    //  must be of type "void f(void *)"

    //\param data Data to be passed to \c func

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

		    const std::string &help,

		    void (*func)(void *),void *data);

  public:

    ///\e

    ArgParser(int argc, const char **argv);

    ~ArgParser();

    ///Add a new integer 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 &intOption(const std::string &name,

		    const std::string &help,

		    int value=0, bool obl=false);

    ///Add a new floating point 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 &doubleOption(const std::string &name,

		      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);

    ///Add a new bool 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.

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

    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,

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

	return *(i->second.string_p);

      }

      ///\e

      operator double() 

      {

	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