void cl::ParseCommandLineOptions(int argc, char **argv,
const char *Overview, bool ReadResponseFiles) {
// Process all registered options.
SmallVector<Option*, 4> PositionalOpts;
SmallVector<Option*, 4> SinkOpts;
StringMap<Option*> Opts;
GetOptionInfo(PositionalOpts, SinkOpts, Opts);
assert((!Opts.empty() || !PositionalOpts.empty()) &&
"No options specified!");
// Expand response files.
std::vector<char*> newArgv;
if (ReadResponseFiles) {
newArgv.push_back(strdup(argv[0]));
ExpandResponseFiles(argc, argv, newArgv);
argv = &newArgv[0];
argc = static_cast<int>(newArgv.size());
}
// Copy the program name into ProgName, making sure not to overflow it.
std::string ProgName = sys::Path(argv[0]).getLast();
size_t Len = std::min(ProgName.size(), size_t(79));
memcpy(ProgramName, ProgName.data(), Len);
ProgramName[Len] = '\0';
ProgramOverview = Overview;
bool ErrorParsing = false;
// Check out the positional arguments to collect information about them.
unsigned NumPositionalRequired = 0;
// Determine whether or not there are an unlimited number of positionals
bool HasUnlimitedPositionals = false;
Option *ConsumeAfterOpt = 0;
if (!PositionalOpts.empty()) {
if (PositionalOpts[0]->getNumOccurrencesFlag() == cl::ConsumeAfter) {
assert(PositionalOpts.size() > 1 &&
"Cannot specify cl::ConsumeAfter without a positional argument!");
ConsumeAfterOpt = PositionalOpts[0];
}
// Calculate how many positional values are _required_.
bool UnboundedFound = false;
for (size_t i = ConsumeAfterOpt != 0, e = PositionalOpts.size();
i != e; ++i) {
Option *Opt = PositionalOpts[i];
if (RequiresValue(Opt))
++NumPositionalRequired;
else if (ConsumeAfterOpt) {
// ConsumeAfter cannot be combined with "optional" positional options
// unless there is only one positional argument...
if (PositionalOpts.size() > 2)
ErrorParsing |=
Opt->error("error - this positional option will never be matched, "
"because it does not Require a value, and a "
"cl::ConsumeAfter option is active!");
} else if (UnboundedFound && !Opt->ArgStr[0]) {
// This option does not "require" a value... Make sure this option is
// not specified after an option that eats all extra arguments, or this
// one will never get any!
//
ErrorParsing |= Opt->error("error - option can never match, because "
"another positional argument will match an "
"unbounded number of values, and this option"
" does not require a value!");
}
UnboundedFound |= EatsUnboundedNumberOfValues(Opt);
}
HasUnlimitedPositionals = UnboundedFound || ConsumeAfterOpt;
}
// PositionalVals - A vector of "positional" arguments we accumulate into
// the process at the end.
//
SmallVector<std::pair<StringRef,unsigned>, 4> PositionalVals;
// If the program has named positional arguments, and the name has been run
// across, keep track of which positional argument was named. Otherwise put
// the positional args into the PositionalVals list...
Option *ActivePositionalArg = 0;
// Loop over all of the arguments... processing them.
bool DashDashFound = false; // Have we read '--'?
for (int i = 1; i < argc; ++i) {
Option *Handler = 0;
StringRef Value;
StringRef ArgName = "";
// If the option list changed, this means that some command line
// option has just been registered or deregistered. This can occur in
// response to things like -load, etc. If this happens, rescan the options.
if (OptionListChanged) {
PositionalOpts.clear();
SinkOpts.clear();
Opts.clear();
GetOptionInfo(PositionalOpts, SinkOpts, Opts);
OptionListChanged = false;
}
// Check to see if this is a positional argument. This argument is
// considered to be positional if it doesn't start with '-', if it is "-"
// itself, or if we have seen "--" already.
//
if (argv[i][0] != '-' || argv[i][1] == 0 || DashDashFound) {
// Positional argument!
if (ActivePositionalArg) {
ProvidePositionalOption(ActivePositionalArg, argv[i], i);
continue; // We are done!
}
if (!PositionalOpts.empty()) {
PositionalVals.push_back(std::make_pair(argv[i],i));
// All of the positional arguments have been fulfulled, give the rest to
// the consume after option... if it's specified...
//
if (PositionalVals.size() >= NumPositionalRequired &&
ConsumeAfterOpt != 0) {
for (++i; i < argc; ++i)
PositionalVals.push_back(std::make_pair(argv[i],i));
break; // Handle outside of the argument processing loop...
}
// Delay processing positional arguments until the end...
continue;
}
} else if (argv[i][0] == '-' && argv[i][1] == '-' && argv[i][2] == 0 &&
!DashDashFound) {
DashDashFound = true; // This is the mythical "--"?
continue; // Don't try to process it as an argument itself.
} else if (ActivePositionalArg &&
(ActivePositionalArg->getMiscFlags() & PositionalEatsArgs)) {
// If there is a positional argument eating options, check to see if this
// option is another positional argument. If so, treat it as an argument,
// otherwise feed it to the eating positional.
ArgName = argv[i]+1;
// Eat leading dashes.
while (!ArgName.empty() && ArgName[0] == '-')
ArgName = ArgName.substr(1);
Handler = LookupOption(ArgName, Value, Opts);
if (!Handler || Handler->getFormattingFlag() != cl::Positional) {
ProvidePositionalOption(ActivePositionalArg, argv[i], i);
continue; // We are done!
}
} else { // We start with a '-', must be an argument.
ArgName = argv[i]+1;
// Eat leading dashes.
while (!ArgName.empty() && ArgName[0] == '-')
ArgName = ArgName.substr(1);
Handler = LookupOption(ArgName, Value, Opts);
// Check to see if this "option" is really a prefixed or grouped argument.
if (Handler == 0)
Handler = HandlePrefixedOrGroupedOption(ArgName, Value,
ErrorParsing, Opts);
}
if (Handler == 0) {
if (SinkOpts.empty()) {
errs() << ProgramName << ": Unknown command line argument '"
<< argv[i] << "'. Try: '" << argv[0] << " -help'\n";
ErrorParsing = true;
} else {
for (SmallVectorImpl<Option*>::iterator I = SinkOpts.begin(),
E = SinkOpts.end(); I != E ; ++I)
(*I)->addOccurrence(i, "", argv[i]);
}
continue;
}
// If this is a named positional argument, just remember that it is the
// active one...
if (Handler->getFormattingFlag() == cl::Positional)
ActivePositionalArg = Handler;
else
ErrorParsing |= ProvideOption(Handler, ArgName, Value, argc, argv, i);
}
// Check and handle positional arguments now...
if (NumPositionalRequired > PositionalVals.size()) {
errs() << ProgramName
<< ": Not enough positional command line arguments specified!\n"
<< "Must specify at least " << NumPositionalRequired
<< " positional arguments: See: " << argv[0] << " -help\n";
ErrorParsing = true;
} else if (!HasUnlimitedPositionals &&
PositionalVals.size() > PositionalOpts.size()) {
errs() << ProgramName
<< ": Too many positional arguments specified!\n"
<< "Can specify at most " << PositionalOpts.size()
<< " positional arguments: See: " << argv[0] << " -help\n";
ErrorParsing = true;
} else if (ConsumeAfterOpt == 0) {
// Positional args have already been handled if ConsumeAfter is specified.
unsigned ValNo = 0, NumVals = static_cast<unsigned>(PositionalVals.size());
for (size_t i = 0, e = PositionalOpts.size(); i != e; ++i) {
if (RequiresValue(PositionalOpts[i])) {
ProvidePositionalOption(PositionalOpts[i], PositionalVals[ValNo].first,
PositionalVals[ValNo].second);
ValNo++;
--NumPositionalRequired; // We fulfilled our duty...
}
// If we _can_ give this option more arguments, do so now, as long as we
// do not give it values that others need. 'Done' controls whether the
// option even _WANTS_ any more.
//
bool Done = PositionalOpts[i]->getNumOccurrencesFlag() == cl::Required;
while (NumVals-ValNo > NumPositionalRequired && !Done) {
switch (PositionalOpts[i]->getNumOccurrencesFlag()) {
case cl::Optional:
Done = true; // Optional arguments want _at most_ one value
// FALL THROUGH
case cl::ZeroOrMore: // Zero or more will take all they can get...
case cl::OneOrMore: // One or more will take all they can get...
ProvidePositionalOption(PositionalOpts[i],
PositionalVals[ValNo].first,
PositionalVals[ValNo].second);
ValNo++;
break;
default:
llvm_unreachable("Internal error, unexpected NumOccurrences flag in "
"positional argument processing!");
}
}
}
} else {
assert(ConsumeAfterOpt && NumPositionalRequired <= PositionalVals.size());
unsigned ValNo = 0;
for (size_t j = 1, e = PositionalOpts.size(); j != e; ++j)
if (RequiresValue(PositionalOpts[j])) {
ErrorParsing |= ProvidePositionalOption(PositionalOpts[j],
PositionalVals[ValNo].first,
PositionalVals[ValNo].second);
ValNo++;
}
// Handle the case where there is just one positional option, and it's
// optional. In this case, we want to give JUST THE FIRST option to the
// positional option and keep the rest for the consume after. The above
// loop would have assigned no values to positional options in this case.
//
if (PositionalOpts.size() == 2 && ValNo == 0 && !PositionalVals.empty()) {
ErrorParsing |= ProvidePositionalOption(PositionalOpts[1],
PositionalVals[ValNo].first,
PositionalVals[ValNo].second);
ValNo++;
}
// Handle over all of the rest of the arguments to the
// cl::ConsumeAfter command line option...
for (; ValNo != PositionalVals.size(); ++ValNo)
ErrorParsing |= ProvidePositionalOption(ConsumeAfterOpt,
PositionalVals[ValNo].first,
PositionalVals[ValNo].second);
}
// Loop over args and make sure all required args are specified!
for (StringMap<Option*>::iterator I = Opts.begin(),
E = Opts.end(); I != E; ++I) {
switch (I->second->getNumOccurrencesFlag()) {
case Required:
case OneOrMore:
if (I->second->getNumOccurrences() == 0) {
I->second->error("must be specified at least once!");
ErrorParsing = true;
}
// Fall through
default:
break;
}
}
// Free all of the memory allocated to the map. Command line options may only
// be processed once!
Opts.clear();
PositionalOpts.clear();
MoreHelp->clear();
// Free the memory allocated by ExpandResponseFiles.
if (ReadResponseFiles) {
// Free all the strdup()ed strings.
for (std::vector<char*>::iterator i = newArgv.begin(), e = newArgv.end();
i != e; ++i)
free(*i);
}
DEBUG(dbgs() << "Args: ";
for (int i = 0; i < argc; ++i)
dbgs() << argv[i] << ' ';
dbgs() << '\n';
);
/// Set the current debug type, as if the -debug-only=X
/// option were specified. Note that DebugFlag also needs to be set to true for
/// debug output to be produced.
///
void setCurrentDebugType(const char *Type) {
CurrentDebugType->clear();
CurrentDebugType->push_back(Type);
}
static void clearGarbage(LLVMContext &Context) {
Objects->clear();
Context.pImpl->LLVMObjects.clear();
}