lemon/arg_parser.cc
author Akos Ladanyi <ladanyi@tmit.bme.hu>
Sun, 13 Apr 2008 13:22:52 +0200
changeset 141 96f81c791f0c
parent 128 7cd965d2257f
child 209 765619b7cbb2
permissions -rw-r--r--
CMake based build system
     1 /* -*- C++ -*-
     2  *
     3  * This file is a part of LEMON, a generic C++ optimization library
     4  *
     5  * Copyright (C) 2003-2008
     6  * Egervary Jeno Kombinatorikus Optimalizalasi Kutatocsoport
     7  * (Egervary Research Group on Combinatorial Optimization, EGRES).
     8  *
     9  * Permission to use, modify and distribute this software is granted
    10  * provided that this copyright notice appears in all copies. For
    11  * precise terms see the accompanying LICENSE file.
    12  *
    13  * This software is provided "AS IS" with no warranty of any kind,
    14  * express or implied, and with no claim as to its suitability for any
    15  * purpose.
    16  *
    17  */
    18 
    19 #include <lemon/arg_parser.h>
    20 
    21 namespace lemon {
    22 
    23   void ArgParser::_showHelp(void *p)
    24   {
    25     (static_cast<ArgParser*>(p))->showHelp();
    26     exit(1);
    27   }
    28 
    29   ArgParser::ArgParser(int argc, const char **argv) :_argc(argc), _argv(argv),
    30                                                      _command_name(argv[0]) {
    31     funcOption("-help","Print a short help message",_showHelp,this);
    32     synonym("help","-help");
    33     synonym("h","-help");
    34 
    35   }
    36 
    37   ArgParser::~ArgParser()
    38   {
    39     for(Opts::iterator i=_opts.begin();i!=_opts.end();++i)
    40       if(i->second.self_delete)
    41 	switch(i->second.type) {
    42 	case BOOL:
    43 	  delete i->second.bool_p;
    44 	  break;
    45 	case STRING:
    46 	  delete i->second.string_p;
    47 	  break;
    48 	case DOUBLE:
    49 	  delete i->second.double_p;
    50 	  break;
    51 	case INTEGER:
    52 	  delete i->second.int_p;
    53 	  break;
    54 	case UNKNOWN:
    55 	  break;
    56 	case FUNC:
    57 	  break;
    58 	}
    59   }
    60   
    61 
    62   ArgParser &ArgParser::intOption(const std::string &name,
    63 			       const std::string &help,
    64 			       int value, bool obl)
    65   {
    66     ParData p;
    67     p.int_p=new int(value);
    68     p.self_delete=true;
    69     p.help=help;
    70     p.type=INTEGER;
    71     p.mandatory=obl;
    72     _opts[name]=p;
    73     return *this;
    74   }
    75 
    76   ArgParser &ArgParser::doubleOption(const std::string &name,
    77 			       const std::string &help,
    78 			       double value, bool obl)
    79   {
    80     ParData p;
    81     p.double_p=new double(value);
    82     p.self_delete=true;
    83     p.help=help;
    84     p.type=DOUBLE;
    85     p.mandatory=obl;
    86     _opts[name]=p;
    87     return *this;
    88   }
    89 
    90   ArgParser &ArgParser::boolOption(const std::string &name,
    91 			       const std::string &help,
    92 			       bool value, bool obl)
    93   {
    94     ParData p;
    95     p.bool_p=new bool(value);
    96     p.self_delete=true;
    97     p.help=help;
    98     p.type=BOOL;
    99     p.mandatory=obl;
   100     _opts[name]=p;
   101     return *this;
   102   }
   103 
   104   ArgParser &ArgParser::stringOption(const std::string &name,
   105 			       const std::string &help,
   106 			       std::string value, bool obl)
   107   {
   108     ParData p;
   109     p.string_p=new std::string(value);
   110     p.self_delete=true;
   111     p.help=help;
   112     p.type=STRING;
   113     p.mandatory=obl;
   114     _opts[name]=p;
   115     return *this;
   116   }
   117 
   118   ArgParser &ArgParser::refOption(const std::string &name,
   119 			       const std::string &help,
   120 			       int &ref, bool obl)
   121   {
   122     ParData p;
   123     p.int_p=&ref;
   124     p.self_delete=false;
   125     p.help=help;
   126     p.type=INTEGER;
   127     p.mandatory=obl;
   128     _opts[name]=p;
   129     return *this;
   130   }
   131 
   132   ArgParser &ArgParser::refOption(const std::string &name,
   133                                   const std::string &help,
   134                                   double &ref, bool obl)
   135   {
   136     ParData p;
   137     p.double_p=&ref;
   138     p.self_delete=false;
   139     p.help=help;
   140     p.type=DOUBLE;
   141     p.mandatory=obl;
   142     _opts[name]=p;
   143     return *this;
   144   }
   145 
   146   ArgParser &ArgParser::refOption(const std::string &name,
   147                                   const std::string &help,
   148                                   bool &ref, bool obl)
   149   {
   150     ParData p;
   151     p.bool_p=&ref;
   152     p.self_delete=false;
   153     p.help=help;
   154     p.type=BOOL;
   155     p.mandatory=obl;
   156     _opts[name]=p;
   157 
   158     ref = false;
   159 
   160     return *this;
   161   }
   162 
   163   ArgParser &ArgParser::refOption(const std::string &name,
   164 			       const std::string &help,
   165 			       std::string &ref, bool obl)
   166   {
   167     ParData p;
   168     p.string_p=&ref;
   169     p.self_delete=false;
   170     p.help=help;
   171     p.type=STRING;
   172     p.mandatory=obl;
   173     _opts[name]=p;
   174     return *this;
   175   }
   176 
   177   ArgParser &ArgParser::funcOption(const std::string &name,
   178 			       const std::string &help,
   179 			       void (*func)(void *),void *data)
   180   {
   181     ParData p;
   182     p.func_p.p=func;
   183     p.func_p.data=data;
   184     p.self_delete=false;
   185     p.help=help;
   186     p.type=FUNC;
   187     p.mandatory=false;
   188     _opts[name]=p;
   189     return *this;
   190   }
   191 
   192   ArgParser &ArgParser::optionGroup(const std::string &group,
   193 				    const std::string &opt)
   194   {
   195     Opts::iterator i = _opts.find(opt);
   196     LEMON_ASSERT(i!=_opts.end(), "Unknown option: '"+opt+"'");
   197     LEMON_ASSERT(!(i->second.ingroup), 
   198                  "Option already in option group: '"+opt+"'");
   199     GroupData &g=_groups[group];
   200     g.opts.push_back(opt);
   201     i->second.ingroup=true;
   202     return *this;
   203   }
   204 
   205   ArgParser &ArgParser::onlyOneGroup(const std::string &group)
   206   {
   207     GroupData &g=_groups[group];
   208     g.only_one=true;
   209     return *this;
   210   }
   211 
   212   ArgParser &ArgParser::synonym(const std::string &syn,
   213 				const std::string &opt)
   214   {
   215     Opts::iterator o = _opts.find(opt);
   216     Opts::iterator s = _opts.find(syn);
   217     LEMON_ASSERT(o!=_opts.end(), "Unknown option: '"+opt+"'");
   218     LEMON_ASSERT(s==_opts.end(), "Option already used: '"+syn+"'");
   219     ParData p;
   220     p.help=opt;
   221     p.mandatory=false;
   222     p.syn=true;
   223     _opts[syn]=p;
   224     o->second.has_syn=true;
   225     return *this;
   226   }
   227 
   228   ArgParser &ArgParser::mandatoryGroup(const std::string &group)
   229   {
   230     GroupData &g=_groups[group];
   231     g.mandatory=true;
   232     return *this;
   233   }
   234 
   235   ArgParser &ArgParser::other(const std::string &name,
   236 			      const std::string &help)
   237   {
   238     _others_help.push_back(OtherArg(name,help));
   239     return *this;
   240   }
   241 
   242   void ArgParser::show(std::ostream &os,Opts::iterator i)
   243   {
   244     os << "-" << i->first;
   245     if(i->second.has_syn)
   246       for(Opts::iterator j=_opts.begin();j!=_opts.end();++j)
   247 	if(j->second.syn&&j->second.help==i->first)
   248 	  os << "|-" << j->first;
   249     switch(i->second.type) {
   250     case STRING:
   251       os << " str";
   252       break;
   253     case INTEGER:
   254       os << " int";
   255       break;
   256     case DOUBLE:
   257       os << " num";
   258       break;
   259     default:
   260       break;
   261     }
   262   }
   263 
   264   void ArgParser::show(std::ostream &os,Groups::iterator i)
   265   {
   266     GroupData::Opts::iterator o=i->second.opts.begin();
   267     while(o!=i->second.opts.end()) {
   268       show(os,_opts.find(*o));
   269       ++o;
   270       if(o!=i->second.opts.end()) os<<'|';
   271     }
   272   }
   273     
   274   void ArgParser::showHelp(Opts::iterator i)
   275   {
   276     if(i->second.help.size()==0||i->second.syn) return;
   277     std::cerr << "  ";
   278     show(std::cerr,i);
   279     std::cerr << std::endl;
   280     std::cerr << "     " << i->second.help << std::endl;
   281   }
   282   void ArgParser::showHelp(std::vector<ArgParser::OtherArg>::iterator i)
   283   {
   284     if(i->help.size()==0) return;
   285     std::cerr << "  " << i->name << std::endl
   286 	      << "     " << i->help << std::endl;
   287   }
   288     
   289   void ArgParser::shortHelp()
   290   {
   291     const unsigned int LINE_LEN=77;
   292     const std::string indent("    ");
   293     std::cerr << "Usage:\n  " << _command_name;
   294     int pos=_command_name.size()+2;
   295     for(Groups::iterator g=_groups.begin();g!=_groups.end();++g) {
   296       std::ostringstream cstr;
   297       cstr << ' ';
   298       if(!g->second.mandatory) cstr << '[';
   299       show(cstr,g);
   300       if(!g->second.mandatory) cstr << ']';
   301       if(pos+cstr.str().size()>LINE_LEN) {
   302 	std::cerr << std::endl << indent;
   303 	pos=indent.size();
   304       }
   305       std::cerr << cstr.str();
   306       pos+=cstr.str().size();
   307     }
   308     for(Opts::iterator i=_opts.begin();i!=_opts.end();++i)
   309       if(!i->second.ingroup&&!i->second.syn) {
   310 	std::ostringstream cstr;
   311 	cstr << ' ';
   312 	if(!i->second.mandatory) cstr << '[';
   313 	show(cstr,i);
   314 	if(!i->second.mandatory) cstr << ']';
   315 	if(pos+cstr.str().size()>LINE_LEN) {
   316 	  std::cerr << std::endl << indent;
   317 	  pos=indent.size();
   318 	}
   319 	std::cerr << cstr.str();
   320 	pos+=cstr.str().size();
   321       }
   322     for(std::vector<OtherArg>::iterator i=_others_help.begin();
   323 	i!=_others_help.end();++i)
   324       {
   325 	std::ostringstream cstr;
   326 	cstr << ' ' << i->name;
   327       
   328 	if(pos+cstr.str().size()>LINE_LEN) {
   329 	  std::cerr << std::endl << indent;
   330 	  pos=indent.size();
   331 	}
   332 	std::cerr << cstr.str();
   333 	pos+=cstr.str().size();
   334       }
   335     std::cerr << std::endl;
   336   }
   337     
   338   void ArgParser::showHelp()
   339   {
   340     shortHelp();
   341     std::cerr << "Where:\n";
   342     for(std::vector<OtherArg>::iterator i=_others_help.begin();
   343 	i!=_others_help.end();++i) showHelp(i);
   344     for(Opts::iterator i=_opts.begin();i!=_opts.end();++i) showHelp(i);
   345     exit(1);
   346   }
   347     
   348       
   349   void ArgParser::unknownOpt(std::string arg) 
   350   {
   351     std::cerr << "\nUnknown option: " << arg << "\n";
   352     std::cerr << "\nType '" << _command_name <<
   353       " --help' to obtain a short summary on the usage.\n\n";
   354     exit(1);
   355   }
   356     
   357   void ArgParser::requiresValue(std::string arg, OptType t) 
   358   {
   359     std::cerr << "Argument '" << arg << "' requires a";
   360     switch(t) {
   361     case STRING:
   362       std::cerr << " string";
   363       break;
   364     case INTEGER:
   365       std::cerr << "n integer";
   366       break;
   367     case DOUBLE:
   368       std::cerr << " floating point";
   369       break;
   370     default:
   371       break;
   372     }
   373     std::cerr << " value\n\n";
   374     showHelp();
   375   }
   376     
   377 
   378   void ArgParser::checkMandatories()
   379   {
   380     bool ok=true;
   381     for(Opts::iterator i=_opts.begin();i!=_opts.end();++i)
   382       if(i->second.mandatory&&!i->second.set) 
   383 	{
   384 	  if(ok)
   385 	    std::cerr << _command_name 
   386 		      << ": The following mandatory arguments are missing.\n";
   387 	  ok=false;
   388 	  showHelp(i);
   389 	}
   390     for(Groups::iterator i=_groups.begin();i!=_groups.end();++i)
   391       if(i->second.mandatory||i->second.only_one)
   392 	{
   393 	  int set=0;
   394 	  for(GroupData::Opts::iterator o=i->second.opts.begin();
   395 	      o!=i->second.opts.end();++o)
   396 	    if(_opts.find(*o)->second.set) ++set;
   397 	  if(i->second.mandatory&&!set) {
   398 	    std::cerr << _command_name 
   399 		      << ": At least one of the following arguments is mandatory.\n";
   400 	    ok=false;
   401 	    for(GroupData::Opts::iterator o=i->second.opts.begin();
   402 		o!=i->second.opts.end();++o)
   403 	      showHelp(_opts.find(*o));
   404 	  }
   405 	  if(i->second.only_one&&set>1) {
   406 	    std::cerr << _command_name 
   407 		      << ": At most one of the following arguments can be given.\n";
   408 	    ok=false;
   409 	    for(GroupData::Opts::iterator o=i->second.opts.begin();
   410 		o!=i->second.opts.end();++o)
   411 	      showHelp(_opts.find(*o));
   412 	  }
   413 	}
   414     if(!ok) {
   415       std::cerr << "\nType '" << _command_name <<
   416 	" --help' to obtain a short summary on the usage.\n\n";
   417       exit(1);
   418     }
   419   }
   420 
   421   ArgParser &ArgParser::parse()
   422   {
   423     for(int ar=1; ar<_argc; ++ar) {
   424       std::string arg(_argv[ar]);
   425       if (arg[0] != '-' || arg.size() == 1) {
   426 	_file_args.push_back(arg);
   427       }
   428       else {
   429 	Opts::iterator i = _opts.find(arg.substr(1));
   430 	if(i==_opts.end()) unknownOpt(arg);
   431 	else {
   432 	  if(i->second.syn) i=_opts.find(i->second.help);
   433 	  ParData &p(i->second);
   434 	  if (p.type==BOOL) *p.bool_p=true;
   435 	  else if (p.type==FUNC) p.func_p.p(p.func_p.data);
   436 	  else if(++ar==_argc) requiresValue(arg, p.type);
   437 	  else {
   438 	    std::string val(_argv[ar]);
   439 	    std::istringstream vals(val);
   440 	    switch(p.type) {
   441 	    case STRING:
   442 	      *p.string_p=val;
   443 	      break;
   444 	    case INTEGER:
   445 	      vals >> *p.int_p;
   446 	      break;
   447 	    case DOUBLE:
   448 	      vals >> *p.double_p;
   449 	      break;
   450 	    default:
   451 	      break;
   452 	    }
   453 	    if(p.type!=STRING&&(!vals||!vals.eof()))
   454 	      requiresValue(arg, p.type);
   455 	  }
   456 	  p.set = true;
   457 	}
   458       }
   459     }
   460     checkMandatories();
   461 
   462     return *this;
   463   }  
   464 
   465 }