1 //===-- CommandLine.cpp - Command line parser implementation --------------===//
3 // The LLVM Compiler Infrastructure
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
8 //===----------------------------------------------------------------------===//
10 // This class implements a command line argument processor that is useful when
11 // creating a tool. It provides a simple, minimalistic interface that is easily
12 // extensible and supports nonlocal (library) command line options.
14 // Note that rather than trying to figure out what this code does, you could try
15 // reading the library documentation located in docs/CommandLine.html
17 //===----------------------------------------------------------------------===//
19 #include "llvm/Support/CommandLine.h"
20 #include "llvm/Support/ErrorHandling.h"
21 #include "llvm/Support/MemoryBuffer.h"
22 #include "llvm/Support/ManagedStatic.h"
23 #include "llvm/Support/raw_ostream.h"
24 #include "llvm/Target/TargetRegistry.h"
25 #include "llvm/System/Host.h"
26 #include "llvm/System/Path.h"
27 #include "llvm/ADT/OwningPtr.h"
28 #include "llvm/ADT/StringMap.h"
29 #include "llvm/ADT/SmallString.h"
30 #include "llvm/ADT/Twine.h"
31 #include "llvm/Config/config.h"
38 //===----------------------------------------------------------------------===//
39 // Template instantiations and anchors.
41 TEMPLATE_INSTANTIATION(class basic_parser<bool>);
42 TEMPLATE_INSTANTIATION(class basic_parser<boolOrDefault>);
43 TEMPLATE_INSTANTIATION(class basic_parser<int>);
44 TEMPLATE_INSTANTIATION(class basic_parser<unsigned>);
45 TEMPLATE_INSTANTIATION(class basic_parser<double>);
46 TEMPLATE_INSTANTIATION(class basic_parser<float>);
47 TEMPLATE_INSTANTIATION(class basic_parser<std::string>);
48 TEMPLATE_INSTANTIATION(class basic_parser<char>);
50 TEMPLATE_INSTANTIATION(class opt<unsigned>);
51 TEMPLATE_INSTANTIATION(class opt<int>);
52 TEMPLATE_INSTANTIATION(class opt<std::string>);
53 TEMPLATE_INSTANTIATION(class opt<char>);
54 TEMPLATE_INSTANTIATION(class opt<bool>);
56 void Option::anchor() {}
57 void basic_parser_impl::anchor() {}
58 void parser<bool>::anchor() {}
59 void parser<boolOrDefault>::anchor() {}
60 void parser<int>::anchor() {}
61 void parser<unsigned>::anchor() {}
62 void parser<double>::anchor() {}
63 void parser<float>::anchor() {}
64 void parser<std::string>::anchor() {}
65 void parser<char>::anchor() {}
67 //===----------------------------------------------------------------------===//
69 // Globals for name and overview of program. Program name is not a string to
70 // avoid static ctor/dtor issues.
71 static char ProgramName[80] = "<premain>";
72 static const char *ProgramOverview = 0;
74 // This collects additional help to be printed.
75 static ManagedStatic<std::vector<const char*> > MoreHelp;
77 extrahelp::extrahelp(const char *Help)
79 MoreHelp->push_back(Help);
82 static bool OptionListChanged = false;
84 // MarkOptionsChanged - Internal helper function.
85 void cl::MarkOptionsChanged() {
86 OptionListChanged = true;
89 /// RegisteredOptionList - This is the list of the command line options that
90 /// have statically constructed themselves.
91 static Option *RegisteredOptionList = 0;
93 void Option::addArgument() {
94 assert(NextRegistered == 0 && "argument multiply registered!");
96 NextRegistered = RegisteredOptionList;
97 RegisteredOptionList = this;
102 //===----------------------------------------------------------------------===//
103 // Basic, shared command line option processing machinery.
106 /// GetOptionInfo - Scan the list of registered options, turning them into data
107 /// structures that are easier to handle.
108 static void GetOptionInfo(std::vector<Option*> &PositionalOpts,
109 std::vector<Option*> &SinkOpts,
110 StringMap<Option*> &OptionsMap) {
111 std::vector<const char*> OptionNames;
112 Option *CAOpt = 0; // The ConsumeAfter option if it exists.
113 for (Option *O = RegisteredOptionList; O; O = O->getNextRegisteredOption()) {
114 // If this option wants to handle multiple option names, get the full set.
115 // This handles enum options like "-O1 -O2" etc.
116 O->getExtraOptionNames(OptionNames);
118 OptionNames.push_back(O->ArgStr);
120 // Handle named options.
121 for (size_t i = 0, e = OptionNames.size(); i != e; ++i) {
122 // Add argument to the argument map!
123 if (OptionsMap.GetOrCreateValue(OptionNames[i], O).second != O) {
124 errs() << ProgramName << ": CommandLine Error: Argument '"
125 << OptionNames[i] << "' defined more than once!\n";
131 // Remember information about positional options.
132 if (O->getFormattingFlag() == cl::Positional)
133 PositionalOpts.push_back(O);
134 else if (O->getMiscFlags() & cl::Sink) // Remember sink options
135 SinkOpts.push_back(O);
136 else if (O->getNumOccurrencesFlag() == cl::ConsumeAfter) {
138 O->error("Cannot specify more than one option with cl::ConsumeAfter!");
144 PositionalOpts.push_back(CAOpt);
146 // Make sure that they are in order of registration not backwards.
147 std::reverse(PositionalOpts.begin(), PositionalOpts.end());
151 /// LookupOption - Lookup the option specified by the specified option on the
152 /// command line. If there is a value specified (after an equal sign) return
154 static Option *LookupOption(const char *&Arg, const char *&Value,
155 StringMap<Option*> &OptionsMap) {
156 while (*Arg == '-') ++Arg; // Eat leading dashes
158 const char *ArgEnd = Arg;
159 while (*ArgEnd && *ArgEnd != '=')
160 ++ArgEnd; // Scan till end of argument name.
162 if (*ArgEnd == '=') // If we have an equals sign...
163 Value = ArgEnd+1; // Get the value, not the equals
166 if (*Arg == 0) return 0;
168 // Look up the option.
169 StringMap<Option*>::iterator I =
170 OptionsMap.find(llvm::StringRef(Arg, ArgEnd-Arg));
171 return I != OptionsMap.end() ? I->second : 0;
174 static inline bool ProvideOption(Option *Handler, const char *ArgName,
175 const char *Value, int argc, char **argv,
177 // Is this a multi-argument option?
178 unsigned NumAdditionalVals = Handler->getNumAdditionalVals();
180 // Enforce value requirements
181 switch (Handler->getValueExpectedFlag()) {
183 if (Value == 0) { // No value specified?
184 if (i+1 < argc) { // Steal the next argument, like for '-o filename'
187 return Handler->error("requires a value!");
191 case ValueDisallowed:
192 if (NumAdditionalVals > 0)
193 return Handler->error("multi-valued option specified"
194 " with ValueDisallowed modifier!");
197 return Handler->error("does not allow a value! '" +
198 Twine(Value) + "' specified.");
203 errs() << ProgramName
204 << ": Bad ValueMask flag! CommandLine usage error:"
205 << Handler->getValueExpectedFlag() << "\n";
209 // If this isn't a multi-arg option, just run the handler.
210 if (NumAdditionalVals == 0)
211 return Handler->addOccurrence(i, ArgName, Value ? Value : "");
213 // If it is, run the handle several times.
214 bool MultiArg = false;
217 if (Handler->addOccurrence(i, ArgName, Value, MultiArg))
223 while (NumAdditionalVals > 0) {
226 return Handler->error("not enough values!");
229 if (Handler->addOccurrence(i, ArgName, Value, MultiArg))
237 static bool ProvidePositionalOption(Option *Handler, const std::string &Arg,
240 return ProvideOption(Handler, Handler->ArgStr, Arg.c_str(), 0, 0, Dummy);
244 // Option predicates...
245 static inline bool isGrouping(const Option *O) {
246 return O->getFormattingFlag() == cl::Grouping;
248 static inline bool isPrefixedOrGrouping(const Option *O) {
249 return isGrouping(O) || O->getFormattingFlag() == cl::Prefix;
252 // getOptionPred - Check to see if there are any options that satisfy the
253 // specified predicate with names that are the prefixes in Name. This is
254 // checked by progressively stripping characters off of the name, checking to
255 // see if there options that satisfy the predicate. If we find one, return it,
256 // otherwise return null.
258 static Option *getOptionPred(std::string Name, size_t &Length,
259 bool (*Pred)(const Option*),
260 StringMap<Option*> &OptionsMap) {
262 StringMap<Option*>::iterator OMI = OptionsMap.find(Name);
263 if (OMI != OptionsMap.end() && Pred(OMI->second)) {
264 Length = Name.length();
268 if (Name.size() == 1) return 0;
270 Name.erase(Name.end()-1, Name.end()); // Chop off the last character...
271 OMI = OptionsMap.find(Name);
273 // Loop while we haven't found an option and Name still has at least two
274 // characters in it (so that the next iteration will not be the empty
276 } while ((OMI == OptionsMap.end() || !Pred(OMI->second)) && Name.size() > 1);
278 if (OMI != OptionsMap.end() && Pred(OMI->second)) {
279 Length = Name.length();
280 return OMI->second; // Found one!
282 return 0; // No option found!
285 static bool RequiresValue(const Option *O) {
286 return O->getNumOccurrencesFlag() == cl::Required ||
287 O->getNumOccurrencesFlag() == cl::OneOrMore;
290 static bool EatsUnboundedNumberOfValues(const Option *O) {
291 return O->getNumOccurrencesFlag() == cl::ZeroOrMore ||
292 O->getNumOccurrencesFlag() == cl::OneOrMore;
295 /// ParseCStringVector - Break INPUT up wherever one or more
296 /// whitespace characters are found, and store the resulting tokens in
297 /// OUTPUT. The tokens stored in OUTPUT are dynamically allocated
298 /// using strdup (), so it is the caller's responsibility to free ()
301 static void ParseCStringVector(std::vector<char *> &output,
303 // Characters which will be treated as token separators:
304 static const char *const delims = " \v\f\t\r\n";
306 std::string work (input);
307 // Skip past any delims at head of input string.
308 size_t pos = work.find_first_not_of (delims);
309 // If the string consists entirely of delims, then exit early.
310 if (pos == std::string::npos) return;
311 // Otherwise, jump forward to beginning of first word.
312 work = work.substr (pos);
313 // Find position of first delimiter.
314 pos = work.find_first_of (delims);
316 while (!work.empty() && pos != std::string::npos) {
317 // Everything from 0 to POS is the next word to copy.
318 output.push_back (strdup (work.substr (0,pos).c_str ()));
319 // Is there another word in the string?
320 size_t nextpos = work.find_first_not_of (delims, pos + 1);
321 if (nextpos != std::string::npos) {
322 // Yes? Then remove delims from beginning ...
323 work = work.substr (work.find_first_not_of (delims, pos + 1));
324 // and find the end of the word.
325 pos = work.find_first_of (delims);
327 // No? (Remainder of string is delims.) End the loop.
329 pos = std::string::npos;
333 // If `input' ended with non-delim char, then we'll get here with
334 // the last word of `input' in `work'; copy it now.
335 if (!work.empty ()) {
336 output.push_back (strdup (work.c_str ()));
340 /// ParseEnvironmentOptions - An alternative entry point to the
341 /// CommandLine library, which allows you to read the program's name
342 /// from the caller (as PROGNAME) and its command-line arguments from
343 /// an environment variable (whose name is given in ENVVAR).
345 void cl::ParseEnvironmentOptions(const char *progName, const char *envVar,
346 const char *Overview, bool ReadResponseFiles) {
348 assert(progName && "Program name not specified");
349 assert(envVar && "Environment variable name missing");
351 // Get the environment variable they want us to parse options out of.
352 const char *envValue = getenv(envVar);
356 // Get program's "name", which we wouldn't know without the caller
358 std::vector<char*> newArgv;
359 newArgv.push_back(strdup(progName));
361 // Parse the value of the environment variable into a "command line"
362 // and hand it off to ParseCommandLineOptions().
363 ParseCStringVector(newArgv, envValue);
364 int newArgc = static_cast<int>(newArgv.size());
365 ParseCommandLineOptions(newArgc, &newArgv[0], Overview, ReadResponseFiles);
367 // Free all the strdup()ed strings.
368 for (std::vector<char*>::iterator i = newArgv.begin(), e = newArgv.end();
374 /// ExpandResponseFiles - Copy the contents of argv into newArgv,
375 /// substituting the contents of the response files for the arguments
377 static void ExpandResponseFiles(int argc, char** argv,
378 std::vector<char*>& newArgv) {
379 for (int i = 1; i != argc; ++i) {
384 sys::PathWithStatus respFile(++arg);
386 // Check that the response file is not empty (mmap'ing empty
387 // files can be problematic).
388 const sys::FileStatus *FileStat = respFile.getFileStatus();
389 if (FileStat && FileStat->getSize() != 0) {
391 // Mmap the response file into memory.
392 OwningPtr<MemoryBuffer>
393 respFilePtr(MemoryBuffer::getFile(respFile.c_str()));
395 // If we could open the file, parse its contents, otherwise
396 // pass the @file option verbatim.
398 // TODO: we should also support recursive loading of response files,
399 // since this is how gcc behaves. (From their man page: "The file may
400 // itself contain additional @file options; any such options will be
401 // processed recursively.")
403 if (respFilePtr != 0) {
404 ParseCStringVector(newArgv, respFilePtr->getBufferStart());
409 newArgv.push_back(strdup(arg));
413 void cl::ParseCommandLineOptions(int argc, char **argv,
414 const char *Overview, bool ReadResponseFiles) {
415 // Process all registered options.
416 std::vector<Option*> PositionalOpts;
417 std::vector<Option*> SinkOpts;
418 StringMap<Option*> Opts;
419 GetOptionInfo(PositionalOpts, SinkOpts, Opts);
421 assert((!Opts.empty() || !PositionalOpts.empty()) &&
422 "No options specified!");
424 // Expand response files.
425 std::vector<char*> newArgv;
426 if (ReadResponseFiles) {
427 newArgv.push_back(strdup(argv[0]));
428 ExpandResponseFiles(argc, argv, newArgv);
430 argc = static_cast<int>(newArgv.size());
433 // Copy the program name into ProgName, making sure not to overflow it.
434 std::string ProgName = sys::Path(argv[0]).getLast();
435 if (ProgName.size() > 79) ProgName.resize(79);
436 strcpy(ProgramName, ProgName.c_str());
438 ProgramOverview = Overview;
439 bool ErrorParsing = false;
441 // Check out the positional arguments to collect information about them.
442 unsigned NumPositionalRequired = 0;
444 // Determine whether or not there are an unlimited number of positionals
445 bool HasUnlimitedPositionals = false;
447 Option *ConsumeAfterOpt = 0;
448 if (!PositionalOpts.empty()) {
449 if (PositionalOpts[0]->getNumOccurrencesFlag() == cl::ConsumeAfter) {
450 assert(PositionalOpts.size() > 1 &&
451 "Cannot specify cl::ConsumeAfter without a positional argument!");
452 ConsumeAfterOpt = PositionalOpts[0];
455 // Calculate how many positional values are _required_.
456 bool UnboundedFound = false;
457 for (size_t i = ConsumeAfterOpt != 0, e = PositionalOpts.size();
459 Option *Opt = PositionalOpts[i];
460 if (RequiresValue(Opt))
461 ++NumPositionalRequired;
462 else if (ConsumeAfterOpt) {
463 // ConsumeAfter cannot be combined with "optional" positional options
464 // unless there is only one positional argument...
465 if (PositionalOpts.size() > 2)
467 Opt->error("error - this positional option will never be matched, "
468 "because it does not Require a value, and a "
469 "cl::ConsumeAfter option is active!");
470 } else if (UnboundedFound && !Opt->ArgStr[0]) {
471 // This option does not "require" a value... Make sure this option is
472 // not specified after an option that eats all extra arguments, or this
473 // one will never get any!
475 ErrorParsing |= Opt->error("error - option can never match, because "
476 "another positional argument will match an "
477 "unbounded number of values, and this option"
478 " does not require a value!");
480 UnboundedFound |= EatsUnboundedNumberOfValues(Opt);
482 HasUnlimitedPositionals = UnboundedFound || ConsumeAfterOpt;
485 // PositionalVals - A vector of "positional" arguments we accumulate into
486 // the process at the end...
488 std::vector<std::pair<std::string,unsigned> > PositionalVals;
490 // If the program has named positional arguments, and the name has been run
491 // across, keep track of which positional argument was named. Otherwise put
492 // the positional args into the PositionalVals list...
493 Option *ActivePositionalArg = 0;
495 // Loop over all of the arguments... processing them.
496 bool DashDashFound = false; // Have we read '--'?
497 for (int i = 1; i < argc; ++i) {
499 const char *Value = 0;
500 const char *ArgName = "";
502 // If the option list changed, this means that some command line
503 // option has just been registered or deregistered. This can occur in
504 // response to things like -load, etc. If this happens, rescan the options.
505 if (OptionListChanged) {
506 PositionalOpts.clear();
509 GetOptionInfo(PositionalOpts, SinkOpts, Opts);
510 OptionListChanged = false;
513 // Check to see if this is a positional argument. This argument is
514 // considered to be positional if it doesn't start with '-', if it is "-"
515 // itself, or if we have seen "--" already.
517 if (argv[i][0] != '-' || argv[i][1] == 0 || DashDashFound) {
518 // Positional argument!
519 if (ActivePositionalArg) {
520 ProvidePositionalOption(ActivePositionalArg, argv[i], i);
521 continue; // We are done!
522 } else if (!PositionalOpts.empty()) {
523 PositionalVals.push_back(std::make_pair(argv[i],i));
525 // All of the positional arguments have been fulfulled, give the rest to
526 // the consume after option... if it's specified...
528 if (PositionalVals.size() >= NumPositionalRequired &&
529 ConsumeAfterOpt != 0) {
530 for (++i; i < argc; ++i)
531 PositionalVals.push_back(std::make_pair(argv[i],i));
532 break; // Handle outside of the argument processing loop...
535 // Delay processing positional arguments until the end...
538 } else if (argv[i][0] == '-' && argv[i][1] == '-' && argv[i][2] == 0 &&
540 DashDashFound = true; // This is the mythical "--"?
541 continue; // Don't try to process it as an argument itself.
542 } else if (ActivePositionalArg &&
543 (ActivePositionalArg->getMiscFlags() & PositionalEatsArgs)) {
544 // If there is a positional argument eating options, check to see if this
545 // option is another positional argument. If so, treat it as an argument,
546 // otherwise feed it to the eating positional.
548 Handler = LookupOption(ArgName, Value, Opts);
549 if (!Handler || Handler->getFormattingFlag() != cl::Positional) {
550 ProvidePositionalOption(ActivePositionalArg, argv[i], i);
551 continue; // We are done!
554 } else { // We start with a '-', must be an argument...
556 Handler = LookupOption(ArgName, Value, Opts);
558 // Check to see if this "option" is really a prefixed or grouped argument.
560 std::string RealName(ArgName);
561 if (RealName.size() > 1) {
563 Option *PGOpt = getOptionPred(RealName, Length, isPrefixedOrGrouping,
566 // If the option is a prefixed option, then the value is simply the
567 // rest of the name... so fall through to later processing, by
568 // setting up the argument name flags and value fields.
570 if (PGOpt && PGOpt->getFormattingFlag() == cl::Prefix) {
571 Value = ArgName+Length;
572 assert(Opts.find(std::string(ArgName, Value)) != Opts.end() &&
573 Opts.find(std::string(ArgName, Value))->second == PGOpt);
576 // This must be a grouped option... handle them now.
577 assert(isGrouping(PGOpt) && "Broken getOptionPred!");
580 // Move current arg name out of RealName into RealArgName...
581 std::string RealArgName(RealName.begin(),
582 RealName.begin() + Length);
583 RealName.erase(RealName.begin(), RealName.begin() + Length);
585 // Because ValueRequired is an invalid flag for grouped arguments,
586 // we don't need to pass argc/argv in...
588 assert(PGOpt->getValueExpectedFlag() != cl::ValueRequired &&
589 "Option can not be cl::Grouping AND cl::ValueRequired!");
591 ErrorParsing |= ProvideOption(PGOpt, RealArgName.c_str(),
594 // Get the next grouping option...
595 PGOpt = getOptionPred(RealName, Length, isGrouping, Opts);
596 } while (PGOpt && Length != RealName.size());
598 Handler = PGOpt; // Ate all of the options.
605 if (SinkOpts.empty()) {
606 errs() << ProgramName << ": Unknown command line argument '"
607 << argv[i] << "'. Try: '" << argv[0] << " --help'\n";
610 for (std::vector<Option*>::iterator I = SinkOpts.begin(),
611 E = SinkOpts.end(); I != E ; ++I)
612 (*I)->addOccurrence(i, "", argv[i]);
617 // Check to see if this option accepts a comma separated list of values. If
618 // it does, we have to split up the value into multiple values...
619 if (Value && Handler->getMiscFlags() & CommaSeparated) {
620 std::string Val(Value);
621 std::string::size_type Pos = Val.find(',');
623 while (Pos != std::string::npos) {
624 // Process the portion before the comma...
625 ErrorParsing |= ProvideOption(Handler, ArgName,
626 std::string(Val.begin(),
627 Val.begin()+Pos).c_str(),
629 // Erase the portion before the comma, AND the comma...
630 Val.erase(Val.begin(), Val.begin()+Pos+1);
631 Value += Pos+1; // Increment the original value pointer as well...
633 // Check for another comma...
638 // If this is a named positional argument, just remember that it is the
640 if (Handler->getFormattingFlag() == cl::Positional)
641 ActivePositionalArg = Handler;
643 ErrorParsing |= ProvideOption(Handler, ArgName, Value, argc, argv, i);
646 // Check and handle positional arguments now...
647 if (NumPositionalRequired > PositionalVals.size()) {
648 errs() << ProgramName
649 << ": Not enough positional command line arguments specified!\n"
650 << "Must specify at least " << NumPositionalRequired
651 << " positional arguments: See: " << argv[0] << " --help\n";
654 } else if (!HasUnlimitedPositionals
655 && PositionalVals.size() > PositionalOpts.size()) {
656 errs() << ProgramName
657 << ": Too many positional arguments specified!\n"
658 << "Can specify at most " << PositionalOpts.size()
659 << " positional arguments: See: " << argv[0] << " --help\n";
662 } else if (ConsumeAfterOpt == 0) {
663 // Positional args have already been handled if ConsumeAfter is specified...
664 unsigned ValNo = 0, NumVals = static_cast<unsigned>(PositionalVals.size());
665 for (size_t i = 0, e = PositionalOpts.size(); i != e; ++i) {
666 if (RequiresValue(PositionalOpts[i])) {
667 ProvidePositionalOption(PositionalOpts[i], PositionalVals[ValNo].first,
668 PositionalVals[ValNo].second);
670 --NumPositionalRequired; // We fulfilled our duty...
673 // If we _can_ give this option more arguments, do so now, as long as we
674 // do not give it values that others need. 'Done' controls whether the
675 // option even _WANTS_ any more.
677 bool Done = PositionalOpts[i]->getNumOccurrencesFlag() == cl::Required;
678 while (NumVals-ValNo > NumPositionalRequired && !Done) {
679 switch (PositionalOpts[i]->getNumOccurrencesFlag()) {
681 Done = true; // Optional arguments want _at most_ one value
683 case cl::ZeroOrMore: // Zero or more will take all they can get...
684 case cl::OneOrMore: // One or more will take all they can get...
685 ProvidePositionalOption(PositionalOpts[i],
686 PositionalVals[ValNo].first,
687 PositionalVals[ValNo].second);
691 llvm_unreachable("Internal error, unexpected NumOccurrences flag in "
692 "positional argument processing!");
697 assert(ConsumeAfterOpt && NumPositionalRequired <= PositionalVals.size());
699 for (size_t j = 1, e = PositionalOpts.size(); j != e; ++j)
700 if (RequiresValue(PositionalOpts[j])) {
701 ErrorParsing |= ProvidePositionalOption(PositionalOpts[j],
702 PositionalVals[ValNo].first,
703 PositionalVals[ValNo].second);
707 // Handle the case where there is just one positional option, and it's
708 // optional. In this case, we want to give JUST THE FIRST option to the
709 // positional option and keep the rest for the consume after. The above
710 // loop would have assigned no values to positional options in this case.
712 if (PositionalOpts.size() == 2 && ValNo == 0 && !PositionalVals.empty()) {
713 ErrorParsing |= ProvidePositionalOption(PositionalOpts[1],
714 PositionalVals[ValNo].first,
715 PositionalVals[ValNo].second);
719 // Handle over all of the rest of the arguments to the
720 // cl::ConsumeAfter command line option...
721 for (; ValNo != PositionalVals.size(); ++ValNo)
722 ErrorParsing |= ProvidePositionalOption(ConsumeAfterOpt,
723 PositionalVals[ValNo].first,
724 PositionalVals[ValNo].second);
727 // Loop over args and make sure all required args are specified!
728 for (StringMap<Option*>::iterator I = Opts.begin(),
729 E = Opts.end(); I != E; ++I) {
730 switch (I->second->getNumOccurrencesFlag()) {
733 if (I->second->getNumOccurrences() == 0) {
734 I->second->error("must be specified at least once!");
743 // Free all of the memory allocated to the map. Command line options may only
744 // be processed once!
746 PositionalOpts.clear();
749 // Free the memory allocated by ExpandResponseFiles.
750 if (ReadResponseFiles) {
751 // Free all the strdup()ed strings.
752 for (std::vector<char*>::iterator i = newArgv.begin(), e = newArgv.end();
757 // If we had an error processing our arguments, don't let the program execute
758 if (ErrorParsing) exit(1);
761 //===----------------------------------------------------------------------===//
762 // Option Base class implementation
765 bool Option::error(const Twine &Message, const char *ArgName) {
766 if (ArgName == 0) ArgName = ArgStr;
768 errs() << HelpStr; // Be nice for positional arguments
770 errs() << ProgramName << ": for the -" << ArgName;
772 errs() << " option: " << Message << "\n";
776 bool Option::addOccurrence(unsigned pos, const char *ArgName,
777 StringRef Value, bool MultiArg) {
779 NumOccurrences++; // Increment the number of times we have been seen
781 switch (getNumOccurrencesFlag()) {
783 if (NumOccurrences > 1)
784 return error("may only occur zero or one times!", ArgName);
787 if (NumOccurrences > 1)
788 return error("must occur exactly one time!", ArgName);
792 case ConsumeAfter: break;
793 default: return error("bad num occurrences flag value!");
796 return handleOccurrence(pos, ArgName, Value);
800 // getValueStr - Get the value description string, using "DefaultMsg" if nothing
801 // has been specified yet.
803 static const char *getValueStr(const Option &O, const char *DefaultMsg) {
804 if (O.ValueStr[0] == 0) return DefaultMsg;
808 //===----------------------------------------------------------------------===//
809 // cl::alias class implementation
812 // Return the width of the option tag for printing...
813 size_t alias::getOptionWidth() const {
814 return std::strlen(ArgStr)+6;
817 // Print out the option for the alias.
818 void alias::printOptionInfo(size_t GlobalWidth) const {
819 size_t L = std::strlen(ArgStr);
820 errs() << " -" << ArgStr << std::string(GlobalWidth-L-6, ' ') << " - "
826 //===----------------------------------------------------------------------===//
827 // Parser Implementation code...
830 // basic_parser implementation
833 // Return the width of the option tag for printing...
834 size_t basic_parser_impl::getOptionWidth(const Option &O) const {
835 size_t Len = std::strlen(O.ArgStr);
836 if (const char *ValName = getValueName())
837 Len += std::strlen(getValueStr(O, ValName))+3;
842 // printOptionInfo - Print out information about this option. The
843 // to-be-maintained width is specified.
845 void basic_parser_impl::printOptionInfo(const Option &O,
846 size_t GlobalWidth) const {
847 outs() << " -" << O.ArgStr;
849 if (const char *ValName = getValueName())
850 outs() << "=<" << getValueStr(O, ValName) << '>';
852 outs().indent(GlobalWidth-getOptionWidth(O)) << " - " << O.HelpStr << '\n';
858 // parser<bool> implementation
860 bool parser<bool>::parse(Option &O, const char *ArgName,
861 StringRef Arg, bool &Value) {
862 if (Arg == "" || Arg == "true" || Arg == "TRUE" || Arg == "True" ||
868 if (Arg == "false" || Arg == "FALSE" || Arg == "False" || Arg == "0") {
872 return O.error("'" + Arg +
873 "' is invalid value for boolean argument! Try 0 or 1");
876 // parser<boolOrDefault> implementation
878 bool parser<boolOrDefault>::parse(Option &O, const char *ArgName,
879 StringRef Arg, boolOrDefault &Value) {
880 if (Arg == "" || Arg == "true" || Arg == "TRUE" || Arg == "True" ||
885 if (Arg == "false" || Arg == "FALSE" || Arg == "False" || Arg == "0") {
890 return O.error("'" + Arg +
891 "' is invalid value for boolean argument! Try 0 or 1");
894 // parser<int> implementation
896 bool parser<int>::parse(Option &O, const char *ArgName,
897 StringRef Arg, int &Value) {
898 if (Arg.getAsInteger(0, Value))
899 return O.error("'" + Arg + "' value invalid for integer argument!");
903 // parser<unsigned> implementation
905 bool parser<unsigned>::parse(Option &O, const char *ArgName,
906 StringRef Arg, unsigned &Value) {
908 if (Arg.getAsInteger(0, Value))
909 return O.error("'" + Arg + "' value invalid for uint argument!");
913 // parser<double>/parser<float> implementation
915 static bool parseDouble(Option &O, StringRef Arg, double &Value) {
916 SmallString<32> TmpStr(Arg.begin(), Arg.end());
917 const char *ArgStart = TmpStr.c_str();
919 Value = strtod(ArgStart, &End);
921 return O.error("'" + Arg + "' value invalid for floating point argument!");
925 bool parser<double>::parse(Option &O, const char *AN,
926 StringRef Arg, double &Val) {
927 return parseDouble(O, Arg, Val);
930 bool parser<float>::parse(Option &O, const char *AN,
931 StringRef Arg, float &Val) {
933 if (parseDouble(O, Arg, dVal))
941 // generic_parser_base implementation
944 // findOption - Return the option number corresponding to the specified
945 // argument string. If the option is not found, getNumOptions() is returned.
947 unsigned generic_parser_base::findOption(const char *Name) {
948 unsigned e = getNumOptions();
950 for (unsigned i = 0; i != e; ++i) {
951 if (strcmp(getOption(i), Name) == 0)
958 // Return the width of the option tag for printing...
959 size_t generic_parser_base::getOptionWidth(const Option &O) const {
961 size_t Size = std::strlen(O.ArgStr)+6;
962 for (unsigned i = 0, e = getNumOptions(); i != e; ++i)
963 Size = std::max(Size, std::strlen(getOption(i))+8);
967 for (unsigned i = 0, e = getNumOptions(); i != e; ++i)
968 BaseSize = std::max(BaseSize, std::strlen(getOption(i))+8);
973 // printOptionInfo - Print out information about this option. The
974 // to-be-maintained width is specified.
976 void generic_parser_base::printOptionInfo(const Option &O,
977 size_t GlobalWidth) const {
979 size_t L = std::strlen(O.ArgStr);
980 outs() << " -" << O.ArgStr << std::string(GlobalWidth-L-6, ' ')
981 << " - " << O.HelpStr << '\n';
983 for (unsigned i = 0, e = getNumOptions(); i != e; ++i) {
984 size_t NumSpaces = GlobalWidth-strlen(getOption(i))-8;
985 outs() << " =" << getOption(i) << std::string(NumSpaces, ' ')
986 << " - " << getDescription(i) << '\n';
990 outs() << " " << O.HelpStr << "\n";
991 for (unsigned i = 0, e = getNumOptions(); i != e; ++i) {
992 size_t L = std::strlen(getOption(i));
993 outs() << " -" << getOption(i) << std::string(GlobalWidth-L-8, ' ')
994 << " - " << getDescription(i) << "\n";
1000 //===----------------------------------------------------------------------===//
1001 // --help and --help-hidden option implementation
1008 const Option *EmptyArg;
1009 const bool ShowHidden;
1011 // isHidden/isReallyHidden - Predicates to be used to filter down arg lists.
1012 inline static bool isHidden(Option *Opt) {
1013 return Opt->getOptionHiddenFlag() >= Hidden;
1015 inline static bool isReallyHidden(Option *Opt) {
1016 return Opt->getOptionHiddenFlag() == ReallyHidden;
1020 explicit HelpPrinter(bool showHidden) : ShowHidden(showHidden) {
1024 void operator=(bool Value) {
1025 if (Value == false) return;
1027 // Get all the options.
1028 std::vector<Option*> PositionalOpts;
1029 std::vector<Option*> SinkOpts;
1030 StringMap<Option*> OptMap;
1031 GetOptionInfo(PositionalOpts, SinkOpts, OptMap);
1033 // Copy Options into a vector so we can sort them as we like...
1034 std::vector<Option*> Opts;
1035 for (StringMap<Option*>::iterator I = OptMap.begin(), E = OptMap.end();
1037 Opts.push_back(I->second);
1040 // Eliminate Hidden or ReallyHidden arguments, depending on ShowHidden
1041 Opts.erase(std::remove_if(Opts.begin(), Opts.end(),
1042 std::ptr_fun(ShowHidden ? isReallyHidden : isHidden)),
1045 // Eliminate duplicate entries in table (from enum flags options, f.e.)
1046 { // Give OptionSet a scope
1047 std::set<Option*> OptionSet;
1048 for (unsigned i = 0; i != Opts.size(); ++i)
1049 if (OptionSet.count(Opts[i]) == 0)
1050 OptionSet.insert(Opts[i]); // Add new entry to set
1052 Opts.erase(Opts.begin()+i--); // Erase duplicate
1055 if (ProgramOverview)
1056 outs() << "OVERVIEW: " << ProgramOverview << "\n";
1058 outs() << "USAGE: " << ProgramName << " [options]";
1060 // Print out the positional options.
1061 Option *CAOpt = 0; // The cl::ConsumeAfter option, if it exists...
1062 if (!PositionalOpts.empty() &&
1063 PositionalOpts[0]->getNumOccurrencesFlag() == ConsumeAfter)
1064 CAOpt = PositionalOpts[0];
1066 for (size_t i = CAOpt != 0, e = PositionalOpts.size(); i != e; ++i) {
1067 if (PositionalOpts[i]->ArgStr[0])
1068 outs() << " --" << PositionalOpts[i]->ArgStr;
1069 outs() << " " << PositionalOpts[i]->HelpStr;
1072 // Print the consume after option info if it exists...
1073 if (CAOpt) outs() << " " << CAOpt->HelpStr;
1077 // Compute the maximum argument length...
1079 for (size_t i = 0, e = Opts.size(); i != e; ++i)
1080 MaxArgLen = std::max(MaxArgLen, Opts[i]->getOptionWidth());
1082 outs() << "OPTIONS:\n";
1083 for (size_t i = 0, e = Opts.size(); i != e; ++i)
1084 Opts[i]->printOptionInfo(MaxArgLen);
1086 // Print any extra help the user has declared.
1087 for (std::vector<const char *>::iterator I = MoreHelp->begin(),
1088 E = MoreHelp->end(); I != E; ++I)
1092 // Halt the program since help information was printed
1096 } // End anonymous namespace
1098 // Define the two HelpPrinter instances that are used to print out help, or
1101 static HelpPrinter NormalPrinter(false);
1102 static HelpPrinter HiddenPrinter(true);
1104 static cl::opt<HelpPrinter, true, parser<bool> >
1105 HOp("help", cl::desc("Display available options (--help-hidden for more)"),
1106 cl::location(NormalPrinter), cl::ValueDisallowed);
1108 static cl::opt<HelpPrinter, true, parser<bool> >
1109 HHOp("help-hidden", cl::desc("Display all available options"),
1110 cl::location(HiddenPrinter), cl::Hidden, cl::ValueDisallowed);
1112 static void (*OverrideVersionPrinter)() = 0;
1115 class VersionPrinter {
1118 outs() << "Low Level Virtual Machine (http://llvm.org/):\n"
1119 << " " << PACKAGE_NAME << " version " << PACKAGE_VERSION;
1120 #ifdef LLVM_VERSION_INFO
1121 outs() << LLVM_VERSION_INFO;
1124 #ifndef __OPTIMIZE__
1125 outs() << "DEBUG build";
1127 outs() << "Optimized build";
1130 outs() << " with assertions";
1133 << " Built " << __DATE__ << " (" << __TIME__ << ").\n"
1134 << " Host: " << sys::getHostTriple() << "\n"
1136 << " Registered Targets:\n";
1138 std::vector<std::pair<std::string, const Target*> > Targets;
1140 for (TargetRegistry::iterator it = TargetRegistry::begin(),
1141 ie = TargetRegistry::end(); it != ie; ++it) {
1142 Targets.push_back(std::make_pair(it->getName(), &*it));
1143 Width = std::max(Width, Targets.back().first.length());
1145 std::sort(Targets.begin(), Targets.end());
1147 for (unsigned i = 0, e = Targets.size(); i != e; ++i) {
1148 outs() << " " << Targets[i].first
1149 << std::string(Width - Targets[i].first.length(), ' ') << " - "
1150 << Targets[i].second->getShortDescription() << "\n";
1152 if (Targets.empty())
1153 outs() << " (none)\n";
1155 void operator=(bool OptionWasSpecified) {
1156 if (OptionWasSpecified) {
1157 if (OverrideVersionPrinter == 0) {
1161 (*OverrideVersionPrinter)();
1167 } // End anonymous namespace
1170 // Define the --version option that prints out the LLVM version for the tool
1171 static VersionPrinter VersionPrinterInstance;
1173 static cl::opt<VersionPrinter, true, parser<bool> >
1174 VersOp("version", cl::desc("Display the version of this program"),
1175 cl::location(VersionPrinterInstance), cl::ValueDisallowed);
1177 // Utility function for printing the help message.
1178 void cl::PrintHelpMessage() {
1179 // This looks weird, but it actually prints the help message. The
1180 // NormalPrinter variable is a HelpPrinter and the help gets printed when
1181 // its operator= is invoked. That's because the "normal" usages of the
1182 // help printer is to be assigned true/false depending on whether the
1183 // --help option was given or not. Since we're circumventing that we have
1184 // to make it look like --help was given, so we assign true.
1185 NormalPrinter = true;
1188 /// Utility function for printing version number.
1189 void cl::PrintVersionMessage() {
1190 VersionPrinterInstance.print();
1193 void cl::SetVersionPrinter(void (*func)()) {
1194 OverrideVersionPrinter = func;