lemon/arg_parser.cc
author Peter Kovacs <kpeter@inf.elte.hu>
Sat, 12 Jul 2008 10:21:44 +0200
changeset 204 77d56a21c3ab
parent 128 7cd965d2257f
child 209 765619b7cbb2
permissions -rw-r--r--
Doc improvements related to ArgParser
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/* -*- C++ -*-
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 *
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 * This file is a part of LEMON, a generic C++ optimization library
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 *
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 * Copyright (C) 2003-2008
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 * Egervary Jeno Kombinatorikus Optimalizalasi Kutatocsoport
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 * (Egervary Research Group on Combinatorial Optimization, EGRES).
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 *
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 * Permission to use, modify and distribute this software is granted
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 * provided that this copyright notice appears in all copies. For
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 * precise terms see the accompanying LICENSE file.
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 *
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 * This software is provided "AS IS" with no warranty of any kind,
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 * express or implied, and with no claim as to its suitability for any
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 * purpose.
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 *
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 */
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#include <lemon/arg_parser.h>
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namespace lemon {
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  void ArgParser::_showHelp(void *p)
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  {
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    (static_cast<ArgParser*>(p))->showHelp();
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    exit(1);
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  }
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  ArgParser::ArgParser(int argc, const char **argv) :_argc(argc), _argv(argv),
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                                                     _command_name(argv[0]) {
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    funcOption("-help","Print a short help message",_showHelp,this);
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    synonym("help","-help");
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    synonym("h","-help");
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  }
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  ArgParser::~ArgParser()
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  {
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    for(Opts::iterator i=_opts.begin();i!=_opts.end();++i)
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      if(i->second.self_delete)
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	switch(i->second.type) {
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	case BOOL:
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	  delete i->second.bool_p;
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	  break;
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	case STRING:
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	  delete i->second.string_p;
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	  break;
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	case DOUBLE:
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	  delete i->second.double_p;
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	  break;
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	case INTEGER:
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	  delete i->second.int_p;
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	  break;
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	case UNKNOWN:
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	  break;
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	case FUNC:
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	  break;
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	}
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  }
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  ArgParser &ArgParser::intOption(const std::string &name,
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			       const std::string &help,
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			       int value, bool obl)
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  {
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    ParData p;
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    p.int_p=new int(value);
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    p.self_delete=true;
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    p.help=help;
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    p.type=INTEGER;
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    p.mandatory=obl;
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    _opts[name]=p;
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    return *this;
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  }
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  ArgParser &ArgParser::doubleOption(const std::string &name,
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			       const std::string &help,
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			       double value, bool obl)
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  {
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    ParData p;
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    p.double_p=new double(value);
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    p.self_delete=true;
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    p.help=help;
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    p.type=DOUBLE;
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    p.mandatory=obl;
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    _opts[name]=p;
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    return *this;
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  }
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  ArgParser &ArgParser::boolOption(const std::string &name,
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			       const std::string &help,
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			       bool value, bool obl)
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  {
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    ParData p;
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    p.bool_p=new bool(value);
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    p.self_delete=true;
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    p.help=help;
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    p.type=BOOL;
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    p.mandatory=obl;
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    _opts[name]=p;
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    return *this;
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  }
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  ArgParser &ArgParser::stringOption(const std::string &name,
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			       const std::string &help,
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			       std::string value, bool obl)
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  {
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    ParData p;
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    p.string_p=new std::string(value);
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    p.self_delete=true;
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    p.help=help;
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    p.type=STRING;
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    p.mandatory=obl;
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    _opts[name]=p;
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    return *this;
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  }
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  ArgParser &ArgParser::refOption(const std::string &name,
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			       const std::string &help,
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			       int &ref, bool obl)
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  {
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    ParData p;
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    p.int_p=&ref;
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    p.self_delete=false;
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    p.help=help;
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    p.type=INTEGER;
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    p.mandatory=obl;
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    _opts[name]=p;
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    return *this;
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  }
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  ArgParser &ArgParser::refOption(const std::string &name,
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                                  const std::string &help,
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                                  double &ref, bool obl)
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  {
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    ParData p;
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    p.double_p=&ref;
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    p.self_delete=false;
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    p.help=help;
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    p.type=DOUBLE;
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    p.mandatory=obl;
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    _opts[name]=p;
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    return *this;
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  }
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  ArgParser &ArgParser::refOption(const std::string &name,
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                                  const std::string &help,
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                                  bool &ref, bool obl)
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  {
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    ParData p;
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    p.bool_p=&ref;
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    p.self_delete=false;
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    p.help=help;
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    p.type=BOOL;
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    p.mandatory=obl;
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    _opts[name]=p;
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    ref = false;
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    return *this;
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  }
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  ArgParser &ArgParser::refOption(const std::string &name,
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			       const std::string &help,
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			       std::string &ref, bool obl)
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  {
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    ParData p;
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    p.string_p=&ref;
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    p.self_delete=false;
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    p.help=help;
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    p.type=STRING;
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    p.mandatory=obl;
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    _opts[name]=p;
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    return *this;
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  }
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  ArgParser &ArgParser::funcOption(const std::string &name,
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			       const std::string &help,
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			       void (*func)(void *),void *data)
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  {
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    ParData p;
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    p.func_p.p=func;
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    p.func_p.data=data;
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    p.self_delete=false;
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    p.help=help;
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    p.type=FUNC;
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    p.mandatory=false;
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    _opts[name]=p;
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    return *this;
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  }
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  ArgParser &ArgParser::optionGroup(const std::string &group,
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				    const std::string &opt)
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  {
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    Opts::iterator i = _opts.find(opt);
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    LEMON_ASSERT(i!=_opts.end(), "Unknown option: '"+opt+"'");
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    LEMON_ASSERT(!(i->second.ingroup), 
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                 "Option already in option group: '"+opt+"'");
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    GroupData &g=_groups[group];
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    g.opts.push_back(opt);
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    i->second.ingroup=true;
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    return *this;
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  }
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  ArgParser &ArgParser::onlyOneGroup(const std::string &group)
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  {
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    GroupData &g=_groups[group];
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    g.only_one=true;
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    return *this;
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  }
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  ArgParser &ArgParser::synonym(const std::string &syn,
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				const std::string &opt)
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  {
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    Opts::iterator o = _opts.find(opt);
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    Opts::iterator s = _opts.find(syn);
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    LEMON_ASSERT(o!=_opts.end(), "Unknown option: '"+opt+"'");
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    LEMON_ASSERT(s==_opts.end(), "Option already used: '"+syn+"'");
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    ParData p;
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    p.help=opt;
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    p.mandatory=false;
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    p.syn=true;
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    _opts[syn]=p;
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    o->second.has_syn=true;
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    return *this;
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  }
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  ArgParser &ArgParser::mandatoryGroup(const std::string &group)
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  {
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    GroupData &g=_groups[group];
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    g.mandatory=true;
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    return *this;
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  }
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  ArgParser &ArgParser::other(const std::string &name,
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			      const std::string &help)
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  {
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    _others_help.push_back(OtherArg(name,help));
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    return *this;
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  }
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  void ArgParser::show(std::ostream &os,Opts::iterator i)
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  {
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    os << "-" << i->first;
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    if(i->second.has_syn)
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      for(Opts::iterator j=_opts.begin();j!=_opts.end();++j)
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	if(j->second.syn&&j->second.help==i->first)
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	  os << "|-" << j->first;
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    switch(i->second.type) {
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    case STRING:
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      os << " str";
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      break;
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    case INTEGER:
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      os << " int";
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      break;
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    case DOUBLE:
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      os << " num";
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      break;
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    default:
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      break;
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    }
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  }
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  void ArgParser::show(std::ostream &os,Groups::iterator i)
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  {
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    GroupData::Opts::iterator o=i->second.opts.begin();
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    while(o!=i->second.opts.end()) {
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      show(os,_opts.find(*o));
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      ++o;
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      if(o!=i->second.opts.end()) os<<'|';
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    }
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  }
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  void ArgParser::showHelp(Opts::iterator i)
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  {
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    if(i->second.help.size()==0||i->second.syn) return;
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    std::cerr << "  ";
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    show(std::cerr,i);
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    std::cerr << std::endl;
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    std::cerr << "     " << i->second.help << std::endl;
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  }
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  void ArgParser::showHelp(std::vector<ArgParser::OtherArg>::iterator i)
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  {
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    if(i->help.size()==0) return;
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    std::cerr << "  " << i->name << std::endl
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	      << "     " << i->help << std::endl;
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  }
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  void ArgParser::shortHelp()
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  {
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    const unsigned int LINE_LEN=77;
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    const std::string indent("    ");
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    std::cerr << "Usage:\n  " << _command_name;
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    int pos=_command_name.size()+2;
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    for(Groups::iterator g=_groups.begin();g!=_groups.end();++g) {
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      std::ostringstream cstr;
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      cstr << ' ';
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      if(!g->second.mandatory) cstr << '[';
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      show(cstr,g);
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      if(!g->second.mandatory) cstr << ']';
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      if(pos+cstr.str().size()>LINE_LEN) {
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	std::cerr << std::endl << indent;
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	pos=indent.size();
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      }
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      std::cerr << cstr.str();
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      pos+=cstr.str().size();
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    }
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    for(Opts::iterator i=_opts.begin();i!=_opts.end();++i)
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      if(!i->second.ingroup&&!i->second.syn) {
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	std::ostringstream cstr;
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	cstr << ' ';
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	if(!i->second.mandatory) cstr << '[';
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	show(cstr,i);
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	if(!i->second.mandatory) cstr << ']';
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	if(pos+cstr.str().size()>LINE_LEN) {
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	  std::cerr << std::endl << indent;
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	  pos=indent.size();
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	}
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	std::cerr << cstr.str();
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	pos+=cstr.str().size();
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      }
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    for(std::vector<OtherArg>::iterator i=_others_help.begin();
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	i!=_others_help.end();++i)
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      {
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	std::ostringstream cstr;
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	cstr << ' ' << i->name;
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	if(pos+cstr.str().size()>LINE_LEN) {
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	  std::cerr << std::endl << indent;
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	  pos=indent.size();
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	}
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	std::cerr << cstr.str();
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	pos+=cstr.str().size();
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      }
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    std::cerr << std::endl;
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  }
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  void ArgParser::showHelp()
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  {
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    shortHelp();
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    std::cerr << "Where:\n";
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    for(std::vector<OtherArg>::iterator i=_others_help.begin();
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	i!=_others_help.end();++i) showHelp(i);
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    for(Opts::iterator i=_opts.begin();i!=_opts.end();++i) showHelp(i);
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    exit(1);
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  }
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  void ArgParser::unknownOpt(std::string arg) 
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  {
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    std::cerr << "\nUnknown option: " << arg << "\n";
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    std::cerr << "\nType '" << _command_name <<
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      " --help' to obtain a short summary on the usage.\n\n";
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    exit(1);
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  }
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  void ArgParser::requiresValue(std::string arg, OptType t) 
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  {
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    std::cerr << "Argument '" << arg << "' requires a";
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    switch(t) {
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    case STRING:
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      std::cerr << " string";
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      break;
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    case INTEGER:
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      std::cerr << "n integer";
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      break;
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    case DOUBLE:
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      std::cerr << " floating point";
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      break;
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    default:
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      break;
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    }
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    std::cerr << " value\n\n";
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    showHelp();
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  }
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  void ArgParser::checkMandatories()
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  {
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    bool ok=true;
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    for(Opts::iterator i=_opts.begin();i!=_opts.end();++i)
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      if(i->second.mandatory&&!i->second.set) 
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	{
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	  if(ok)
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	    std::cerr << _command_name 
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		      << ": The following mandatory arguments are missing.\n";
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	  ok=false;
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	  showHelp(i);
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	}
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    for(Groups::iterator i=_groups.begin();i!=_groups.end();++i)
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      if(i->second.mandatory||i->second.only_one)
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	{
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	  int set=0;
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	  for(GroupData::Opts::iterator o=i->second.opts.begin();
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	      o!=i->second.opts.end();++o)
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	    if(_opts.find(*o)->second.set) ++set;
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	  if(i->second.mandatory&&!set) {
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	    std::cerr << _command_name 
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		      << ": At least one of the following arguments is mandatory.\n";
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	    ok=false;
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	    for(GroupData::Opts::iterator o=i->second.opts.begin();
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		o!=i->second.opts.end();++o)
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	      showHelp(_opts.find(*o));
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	  }
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   405
	  if(i->second.only_one&&set>1) {
alpar@85
   406
	    std::cerr << _command_name 
alpar@85
   407
		      << ": At most one of the following arguments can be given.\n";
alpar@85
   408
	    ok=false;
alpar@85
   409
	    for(GroupData::Opts::iterator o=i->second.opts.begin();
alpar@85
   410
		o!=i->second.opts.end();++o)
alpar@85
   411
	      showHelp(_opts.find(*o));
alpar@85
   412
	  }
alpar@85
   413
	}
alpar@85
   414
    if(!ok) {
alpar@85
   415
      std::cerr << "\nType '" << _command_name <<
alpar@85
   416
	" --help' to obtain a short summary on the usage.\n\n";
alpar@85
   417
      exit(1);
alpar@85
   418
    }
alpar@85
   419
  }
alpar@85
   420
alpar@85
   421
  ArgParser &ArgParser::parse()
alpar@85
   422
  {
alpar@85
   423
    for(int ar=1; ar<_argc; ++ar) {
alpar@85
   424
      std::string arg(_argv[ar]);
alpar@85
   425
      if (arg[0] != '-' || arg.size() == 1) {
alpar@85
   426
	_file_args.push_back(arg);
alpar@85
   427
      }
alpar@85
   428
      else {
alpar@85
   429
	Opts::iterator i = _opts.find(arg.substr(1));
alpar@85
   430
	if(i==_opts.end()) unknownOpt(arg);
alpar@85
   431
	else {
alpar@85
   432
	  if(i->second.syn) i=_opts.find(i->second.help);
alpar@85
   433
	  ParData &p(i->second);
alpar@85
   434
	  if (p.type==BOOL) *p.bool_p=true;
alpar@85
   435
	  else if (p.type==FUNC) p.func_p.p(p.func_p.data);
alpar@85
   436
	  else if(++ar==_argc) requiresValue(arg, p.type);
alpar@85
   437
	  else {
alpar@85
   438
	    std::string val(_argv[ar]);
alpar@85
   439
	    std::istringstream vals(val);
alpar@85
   440
	    switch(p.type) {
alpar@85
   441
	    case STRING:
alpar@85
   442
	      *p.string_p=val;
alpar@85
   443
	      break;
alpar@85
   444
	    case INTEGER:
alpar@85
   445
	      vals >> *p.int_p;
alpar@85
   446
	      break;
alpar@85
   447
	    case DOUBLE:
alpar@85
   448
	      vals >> *p.double_p;
alpar@85
   449
	      break;
alpar@85
   450
	    default:
alpar@85
   451
	      break;
alpar@85
   452
	    }
alpar@85
   453
	    if(p.type!=STRING&&(!vals||!vals.eof()))
alpar@85
   454
	      requiresValue(arg, p.type);
alpar@85
   455
	  }
alpar@85
   456
	  p.set = true;
alpar@85
   457
	}
alpar@85
   458
      }
alpar@85
   459
    }
alpar@85
   460
    checkMandatories();
alpar@85
   461
alpar@85
   462
    return *this;
alpar@85
   463
  }  
alpar@85
   464
alpar@85
   465
}