Check in LLVM r95781.
diff --git a/lib/Support/CommandLine.cpp b/lib/Support/CommandLine.cpp
new file mode 100644
index 0000000..961dc1f
--- /dev/null
+++ b/lib/Support/CommandLine.cpp
@@ -0,0 +1,1237 @@
+//===-- CommandLine.cpp - Command line parser implementation --------------===//
+//
+// The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+// This class implements a command line argument processor that is useful when
+// creating a tool. It provides a simple, minimalistic interface that is easily
+// extensible and supports nonlocal (library) command line options.
+//
+// Note that rather than trying to figure out what this code does, you could try
+// reading the library documentation located in docs/CommandLine.html
+//
+//===----------------------------------------------------------------------===//
+
+#include "llvm/Support/CommandLine.h"
+#include "llvm/Support/Debug.h"
+#include "llvm/Support/ErrorHandling.h"
+#include "llvm/Support/MemoryBuffer.h"
+#include "llvm/Support/ManagedStatic.h"
+#include "llvm/Support/raw_ostream.h"
+#include "llvm/Target/TargetRegistry.h"
+#include "llvm/System/Host.h"
+#include "llvm/System/Path.h"
+#include "llvm/ADT/OwningPtr.h"
+#include "llvm/ADT/SmallPtrSet.h"
+#include "llvm/ADT/SmallString.h"
+#include "llvm/ADT/StringMap.h"
+#include "llvm/ADT/Twine.h"
+#include "llvm/Config/config.h"
+#include <cerrno>
+#include <cstdlib>
+using namespace llvm;
+using namespace cl;
+
+//===----------------------------------------------------------------------===//
+// Template instantiations and anchors.
+//
+namespace llvm { namespace cl {
+TEMPLATE_INSTANTIATION(class basic_parser<bool>);
+TEMPLATE_INSTANTIATION(class basic_parser<boolOrDefault>);
+TEMPLATE_INSTANTIATION(class basic_parser<int>);
+TEMPLATE_INSTANTIATION(class basic_parser<unsigned>);
+TEMPLATE_INSTANTIATION(class basic_parser<double>);
+TEMPLATE_INSTANTIATION(class basic_parser<float>);
+TEMPLATE_INSTANTIATION(class basic_parser<std::string>);
+TEMPLATE_INSTANTIATION(class basic_parser<char>);
+
+TEMPLATE_INSTANTIATION(class opt<unsigned>);
+TEMPLATE_INSTANTIATION(class opt<int>);
+TEMPLATE_INSTANTIATION(class opt<std::string>);
+TEMPLATE_INSTANTIATION(class opt<char>);
+TEMPLATE_INSTANTIATION(class opt<bool>);
+} } // end namespace llvm::cl
+
+void Option::anchor() {}
+void basic_parser_impl::anchor() {}
+void parser<bool>::anchor() {}
+void parser<boolOrDefault>::anchor() {}
+void parser<int>::anchor() {}
+void parser<unsigned>::anchor() {}
+void parser<double>::anchor() {}
+void parser<float>::anchor() {}
+void parser<std::string>::anchor() {}
+void parser<char>::anchor() {}
+
+//===----------------------------------------------------------------------===//
+
+// Globals for name and overview of program. Program name is not a string to
+// avoid static ctor/dtor issues.
+static char ProgramName[80] = "<premain>";
+static const char *ProgramOverview = 0;
+
+// This collects additional help to be printed.
+static ManagedStatic<std::vector<const char*> > MoreHelp;
+
+extrahelp::extrahelp(const char *Help)
+ : morehelp(Help) {
+ MoreHelp->push_back(Help);
+}
+
+static bool OptionListChanged = false;
+
+// MarkOptionsChanged - Internal helper function.
+void cl::MarkOptionsChanged() {
+ OptionListChanged = true;
+}
+
+/// RegisteredOptionList - This is the list of the command line options that
+/// have statically constructed themselves.
+static Option *RegisteredOptionList = 0;
+
+void Option::addArgument() {
+ assert(NextRegistered == 0 && "argument multiply registered!");
+
+ NextRegistered = RegisteredOptionList;
+ RegisteredOptionList = this;
+ MarkOptionsChanged();
+}
+
+
+//===----------------------------------------------------------------------===//
+// Basic, shared command line option processing machinery.
+//
+
+/// GetOptionInfo - Scan the list of registered options, turning them into data
+/// structures that are easier to handle.
+static void GetOptionInfo(SmallVectorImpl<Option*> &PositionalOpts,
+ SmallVectorImpl<Option*> &SinkOpts,
+ StringMap<Option*> &OptionsMap) {
+ SmallVector<const char*, 16> OptionNames;
+ Option *CAOpt = 0; // The ConsumeAfter option if it exists.
+ for (Option *O = RegisteredOptionList; O; O = O->getNextRegisteredOption()) {
+ // If this option wants to handle multiple option names, get the full set.
+ // This handles enum options like "-O1 -O2" etc.
+ O->getExtraOptionNames(OptionNames);
+ if (O->ArgStr[0])
+ OptionNames.push_back(O->ArgStr);
+
+ // Handle named options.
+ for (size_t i = 0, e = OptionNames.size(); i != e; ++i) {
+ // Add argument to the argument map!
+ if (OptionsMap.GetOrCreateValue(OptionNames[i], O).second != O) {
+ errs() << ProgramName << ": CommandLine Error: Argument '"
+ << OptionNames[i] << "' defined more than once!\n";
+ }
+ }
+
+ OptionNames.clear();
+
+ // Remember information about positional options.
+ if (O->getFormattingFlag() == cl::Positional)
+ PositionalOpts.push_back(O);
+ else if (O->getMiscFlags() & cl::Sink) // Remember sink options
+ SinkOpts.push_back(O);
+ else if (O->getNumOccurrencesFlag() == cl::ConsumeAfter) {
+ if (CAOpt)
+ O->error("Cannot specify more than one option with cl::ConsumeAfter!");
+ CAOpt = O;
+ }
+ }
+
+ if (CAOpt)
+ PositionalOpts.push_back(CAOpt);
+
+ // Make sure that they are in order of registration not backwards.
+ std::reverse(PositionalOpts.begin(), PositionalOpts.end());
+}
+
+
+/// LookupOption - Lookup the option specified by the specified option on the
+/// command line. If there is a value specified (after an equal sign) return
+/// that as well. This assumes that leading dashes have already been stripped.
+static Option *LookupOption(StringRef &Arg, StringRef &Value,
+ const StringMap<Option*> &OptionsMap) {
+ // Reject all dashes.
+ if (Arg.empty()) return 0;
+
+ size_t EqualPos = Arg.find('=');
+
+ // If we have an equals sign, remember the value.
+ if (EqualPos == StringRef::npos) {
+ // Look up the option.
+ StringMap<Option*>::const_iterator I = OptionsMap.find(Arg);
+ return I != OptionsMap.end() ? I->second : 0;
+ }
+
+ // If the argument before the = is a valid option name, we match. If not,
+ // return Arg unmolested.
+ StringMap<Option*>::const_iterator I =
+ OptionsMap.find(Arg.substr(0, EqualPos));
+ if (I == OptionsMap.end()) return 0;
+
+ Value = Arg.substr(EqualPos+1);
+ Arg = Arg.substr(0, EqualPos);
+ return I->second;
+}
+
+/// CommaSeparateAndAddOccurence - A wrapper around Handler->addOccurence() that
+/// does special handling of cl::CommaSeparated options.
+static bool CommaSeparateAndAddOccurence(Option *Handler, unsigned pos,
+ StringRef ArgName,
+ StringRef Value, bool MultiArg = false)
+{
+ // Check to see if this option accepts a comma separated list of values. If
+ // it does, we have to split up the value into multiple values.
+ if (Handler->getMiscFlags() & CommaSeparated) {
+ StringRef Val(Value);
+ StringRef::size_type Pos = Val.find(',');
+
+ while (Pos != StringRef::npos) {
+ // Process the portion before the comma.
+ if (Handler->addOccurrence(pos, ArgName, Val.substr(0, Pos), MultiArg))
+ return true;
+ // Erase the portion before the comma, AND the comma.
+ Val = Val.substr(Pos+1);
+ Value.substr(Pos+1); // Increment the original value pointer as well.
+ // Check for another comma.
+ Pos = Val.find(',');
+ }
+
+ Value = Val;
+ }
+
+ if (Handler->addOccurrence(pos, ArgName, Value, MultiArg))
+ return true;
+
+ return false;
+}
+
+/// ProvideOption - For Value, this differentiates between an empty value ("")
+/// and a null value (StringRef()). The later is accepted for arguments that
+/// don't allow a value (-foo) the former is rejected (-foo=).
+static inline bool ProvideOption(Option *Handler, StringRef ArgName,
+ StringRef Value, int argc, char **argv,
+ int &i) {
+ // Is this a multi-argument option?
+ unsigned NumAdditionalVals = Handler->getNumAdditionalVals();
+
+ // Enforce value requirements
+ switch (Handler->getValueExpectedFlag()) {
+ case ValueRequired:
+ if (Value.data() == 0) { // No value specified?
+ if (i+1 >= argc)
+ return Handler->error("requires a value!");
+ // Steal the next argument, like for '-o filename'
+ Value = argv[++i];
+ }
+ break;
+ case ValueDisallowed:
+ if (NumAdditionalVals > 0)
+ return Handler->error("multi-valued option specified"
+ " with ValueDisallowed modifier!");
+
+ if (Value.data())
+ return Handler->error("does not allow a value! '" +
+ Twine(Value) + "' specified.");
+ break;
+ case ValueOptional:
+ break;
+
+ default:
+ errs() << ProgramName
+ << ": Bad ValueMask flag! CommandLine usage error:"
+ << Handler->getValueExpectedFlag() << "\n";
+ llvm_unreachable(0);
+ }
+
+ // If this isn't a multi-arg option, just run the handler.
+ if (NumAdditionalVals == 0)
+ return CommaSeparateAndAddOccurence(Handler, i, ArgName, Value);
+
+ // If it is, run the handle several times.
+ bool MultiArg = false;
+
+ if (Value.data()) {
+ if (CommaSeparateAndAddOccurence(Handler, i, ArgName, Value, MultiArg))
+ return true;
+ --NumAdditionalVals;
+ MultiArg = true;
+ }
+
+ while (NumAdditionalVals > 0) {
+ if (i+1 >= argc)
+ return Handler->error("not enough values!");
+ Value = argv[++i];
+
+ if (CommaSeparateAndAddOccurence(Handler, i, ArgName, Value, MultiArg))
+ return true;
+ MultiArg = true;
+ --NumAdditionalVals;
+ }
+ return false;
+}
+
+static bool ProvidePositionalOption(Option *Handler, StringRef Arg, int i) {
+ int Dummy = i;
+ return ProvideOption(Handler, Handler->ArgStr, Arg, 0, 0, Dummy);
+}
+
+
+// Option predicates...
+static inline bool isGrouping(const Option *O) {
+ return O->getFormattingFlag() == cl::Grouping;
+}
+static inline bool isPrefixedOrGrouping(const Option *O) {
+ return isGrouping(O) || O->getFormattingFlag() == cl::Prefix;
+}
+
+// getOptionPred - Check to see if there are any options that satisfy the
+// specified predicate with names that are the prefixes in Name. This is
+// checked by progressively stripping characters off of the name, checking to
+// see if there options that satisfy the predicate. If we find one, return it,
+// otherwise return null.
+//
+static Option *getOptionPred(StringRef Name, size_t &Length,
+ bool (*Pred)(const Option*),
+ const StringMap<Option*> &OptionsMap) {
+
+ StringMap<Option*>::const_iterator OMI = OptionsMap.find(Name);
+
+ // Loop while we haven't found an option and Name still has at least two
+ // characters in it (so that the next iteration will not be the empty
+ // string.
+ while (OMI == OptionsMap.end() && Name.size() > 1) {
+ Name = Name.substr(0, Name.size()-1); // Chop off the last character.
+ OMI = OptionsMap.find(Name);
+ }
+
+ if (OMI != OptionsMap.end() && Pred(OMI->second)) {
+ Length = Name.size();
+ return OMI->second; // Found one!
+ }
+ return 0; // No option found!
+}
+
+/// HandlePrefixedOrGroupedOption - The specified argument string (which started
+/// with at least one '-') does not fully match an available option. Check to
+/// see if this is a prefix or grouped option. If so, split arg into output an
+/// Arg/Value pair and return the Option to parse it with.
+static Option *HandlePrefixedOrGroupedOption(StringRef &Arg, StringRef &Value,
+ bool &ErrorParsing,
+ const StringMap<Option*> &OptionsMap) {
+ if (Arg.size() == 1) return 0;
+
+ // Do the lookup!
+ size_t Length = 0;
+ Option *PGOpt = getOptionPred(Arg, Length, isPrefixedOrGrouping, OptionsMap);
+ if (PGOpt == 0) return 0;
+
+ // If the option is a prefixed option, then the value is simply the
+ // rest of the name... so fall through to later processing, by
+ // setting up the argument name flags and value fields.
+ if (PGOpt->getFormattingFlag() == cl::Prefix) {
+ Value = Arg.substr(Length);
+ Arg = Arg.substr(0, Length);
+ assert(OptionsMap.count(Arg) && OptionsMap.find(Arg)->second == PGOpt);
+ return PGOpt;
+ }
+
+ // This must be a grouped option... handle them now. Grouping options can't
+ // have values.
+ assert(isGrouping(PGOpt) && "Broken getOptionPred!");
+
+ do {
+ // Move current arg name out of Arg into OneArgName.
+ StringRef OneArgName = Arg.substr(0, Length);
+ Arg = Arg.substr(Length);
+
+ // Because ValueRequired is an invalid flag for grouped arguments,
+ // we don't need to pass argc/argv in.
+ assert(PGOpt->getValueExpectedFlag() != cl::ValueRequired &&
+ "Option can not be cl::Grouping AND cl::ValueRequired!");
+ int Dummy = 0;
+ ErrorParsing |= ProvideOption(PGOpt, OneArgName,
+ StringRef(), 0, 0, Dummy);
+
+ // Get the next grouping option.
+ PGOpt = getOptionPred(Arg, Length, isGrouping, OptionsMap);
+ } while (PGOpt && Length != Arg.size());
+
+ // Return the last option with Arg cut down to just the last one.
+ return PGOpt;
+}
+
+
+
+static bool RequiresValue(const Option *O) {
+ return O->getNumOccurrencesFlag() == cl::Required ||
+ O->getNumOccurrencesFlag() == cl::OneOrMore;
+}
+
+static bool EatsUnboundedNumberOfValues(const Option *O) {
+ return O->getNumOccurrencesFlag() == cl::ZeroOrMore ||
+ O->getNumOccurrencesFlag() == cl::OneOrMore;
+}
+
+/// ParseCStringVector - Break INPUT up wherever one or more
+/// whitespace characters are found, and store the resulting tokens in
+/// OUTPUT. The tokens stored in OUTPUT are dynamically allocated
+/// using strdup(), so it is the caller's responsibility to free()
+/// them later.
+///
+static void ParseCStringVector(std::vector<char *> &OutputVector,
+ const char *Input) {
+ // Characters which will be treated as token separators:
+ StringRef Delims = " \v\f\t\r\n";
+
+ StringRef WorkStr(Input);
+ while (!WorkStr.empty()) {
+ // If the first character is a delimiter, strip them off.
+ if (Delims.find(WorkStr[0]) != StringRef::npos) {
+ size_t Pos = WorkStr.find_first_not_of(Delims);
+ if (Pos == StringRef::npos) Pos = WorkStr.size();
+ WorkStr = WorkStr.substr(Pos);
+ continue;
+ }
+
+ // Find position of first delimiter.
+ size_t Pos = WorkStr.find_first_of(Delims);
+ if (Pos == StringRef::npos) Pos = WorkStr.size();
+
+ // Everything from 0 to Pos is the next word to copy.
+ char *NewStr = (char*)malloc(Pos+1);
+ memcpy(NewStr, WorkStr.data(), Pos);
+ NewStr[Pos] = 0;
+ OutputVector.push_back(NewStr);
+
+ WorkStr = WorkStr.substr(Pos);
+ }
+}
+
+/// ParseEnvironmentOptions - An alternative entry point to the
+/// CommandLine library, which allows you to read the program's name
+/// from the caller (as PROGNAME) and its command-line arguments from
+/// an environment variable (whose name is given in ENVVAR).
+///
+void cl::ParseEnvironmentOptions(const char *progName, const char *envVar,
+ const char *Overview, bool ReadResponseFiles) {
+ // Check args.
+ assert(progName && "Program name not specified");
+ assert(envVar && "Environment variable name missing");
+
+ // Get the environment variable they want us to parse options out of.
+ const char *envValue = getenv(envVar);
+ if (!envValue)
+ return;
+
+ // Get program's "name", which we wouldn't know without the caller
+ // telling us.
+ std::vector<char*> newArgv;
+ newArgv.push_back(strdup(progName));
+
+ // Parse the value of the environment variable into a "command line"
+ // and hand it off to ParseCommandLineOptions().
+ ParseCStringVector(newArgv, envValue);
+ int newArgc = static_cast<int>(newArgv.size());
+ ParseCommandLineOptions(newArgc, &newArgv[0], Overview, ReadResponseFiles);
+
+ // Free all the strdup()ed strings.
+ for (std::vector<char*>::iterator i = newArgv.begin(), e = newArgv.end();
+ i != e; ++i)
+ free(*i);
+}
+
+
+/// ExpandResponseFiles - Copy the contents of argv into newArgv,
+/// substituting the contents of the response files for the arguments
+/// of type @file.
+static void ExpandResponseFiles(unsigned argc, char** argv,
+ std::vector<char*>& newArgv) {
+ for (unsigned i = 1; i != argc; ++i) {
+ char *arg = argv[i];
+
+ if (arg[0] == '@') {
+ sys::PathWithStatus respFile(++arg);
+
+ // Check that the response file is not empty (mmap'ing empty
+ // files can be problematic).
+ const sys::FileStatus *FileStat = respFile.getFileStatus();
+ if (FileStat && FileStat->getSize() != 0) {
+
+ // Mmap the response file into memory.
+ OwningPtr<MemoryBuffer>
+ respFilePtr(MemoryBuffer::getFile(respFile.c_str()));
+
+ // If we could open the file, parse its contents, otherwise
+ // pass the @file option verbatim.
+
+ // TODO: we should also support recursive loading of response files,
+ // since this is how gcc behaves. (From their man page: "The file may
+ // itself contain additional @file options; any such options will be
+ // processed recursively.")
+
+ if (respFilePtr != 0) {
+ ParseCStringVector(newArgv, respFilePtr->getBufferStart());
+ continue;
+ }
+ }
+ }
+ newArgv.push_back(strdup(arg));
+ }
+}
+
+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';
+ );
+
+ // If we had an error processing our arguments, don't let the program execute
+ if (ErrorParsing) exit(1);
+}
+
+//===----------------------------------------------------------------------===//
+// Option Base class implementation
+//
+
+bool Option::error(const Twine &Message, StringRef ArgName) {
+ if (ArgName.data() == 0) ArgName = ArgStr;
+ if (ArgName.empty())
+ errs() << HelpStr; // Be nice for positional arguments
+ else
+ errs() << ProgramName << ": for the -" << ArgName;
+
+ errs() << " option: " << Message << "\n";
+ return true;
+}
+
+bool Option::addOccurrence(unsigned pos, StringRef ArgName,
+ StringRef Value, bool MultiArg) {
+ if (!MultiArg)
+ NumOccurrences++; // Increment the number of times we have been seen
+
+ switch (getNumOccurrencesFlag()) {
+ case Optional:
+ if (NumOccurrences > 1)
+ return error("may only occur zero or one times!", ArgName);
+ break;
+ case Required:
+ if (NumOccurrences > 1)
+ return error("must occur exactly one time!", ArgName);
+ // Fall through
+ case OneOrMore:
+ case ZeroOrMore:
+ case ConsumeAfter: break;
+ default: return error("bad num occurrences flag value!");
+ }
+
+ return handleOccurrence(pos, ArgName, Value);
+}
+
+
+// getValueStr - Get the value description string, using "DefaultMsg" if nothing
+// has been specified yet.
+//
+static const char *getValueStr(const Option &O, const char *DefaultMsg) {
+ if (O.ValueStr[0] == 0) return DefaultMsg;
+ return O.ValueStr;
+}
+
+//===----------------------------------------------------------------------===//
+// cl::alias class implementation
+//
+
+// Return the width of the option tag for printing...
+size_t alias::getOptionWidth() const {
+ return std::strlen(ArgStr)+6;
+}
+
+// Print out the option for the alias.
+void alias::printOptionInfo(size_t GlobalWidth) const {
+ size_t L = std::strlen(ArgStr);
+ errs() << " -" << ArgStr;
+ errs().indent(GlobalWidth-L-6) << " - " << HelpStr << "\n";
+}
+
+
+
+//===----------------------------------------------------------------------===//
+// Parser Implementation code...
+//
+
+// basic_parser implementation
+//
+
+// Return the width of the option tag for printing...
+size_t basic_parser_impl::getOptionWidth(const Option &O) const {
+ size_t Len = std::strlen(O.ArgStr);
+ if (const char *ValName = getValueName())
+ Len += std::strlen(getValueStr(O, ValName))+3;
+
+ return Len + 6;
+}
+
+// printOptionInfo - Print out information about this option. The
+// to-be-maintained width is specified.
+//
+void basic_parser_impl::printOptionInfo(const Option &O,
+ size_t GlobalWidth) const {
+ outs() << " -" << O.ArgStr;
+
+ if (const char *ValName = getValueName())
+ outs() << "=<" << getValueStr(O, ValName) << '>';
+
+ outs().indent(GlobalWidth-getOptionWidth(O)) << " - " << O.HelpStr << '\n';
+}
+
+
+
+
+// parser<bool> implementation
+//
+bool parser<bool>::parse(Option &O, StringRef ArgName,
+ StringRef Arg, bool &Value) {
+ if (Arg == "" || Arg == "true" || Arg == "TRUE" || Arg == "True" ||
+ Arg == "1") {
+ Value = true;
+ return false;
+ }
+
+ if (Arg == "false" || Arg == "FALSE" || Arg == "False" || Arg == "0") {
+ Value = false;
+ return false;
+ }
+ return O.error("'" + Arg +
+ "' is invalid value for boolean argument! Try 0 or 1");
+}
+
+// parser<boolOrDefault> implementation
+//
+bool parser<boolOrDefault>::parse(Option &O, StringRef ArgName,
+ StringRef Arg, boolOrDefault &Value) {
+ if (Arg == "" || Arg == "true" || Arg == "TRUE" || Arg == "True" ||
+ Arg == "1") {
+ Value = BOU_TRUE;
+ return false;
+ }
+ if (Arg == "false" || Arg == "FALSE" || Arg == "False" || Arg == "0") {
+ Value = BOU_FALSE;
+ return false;
+ }
+
+ return O.error("'" + Arg +
+ "' is invalid value for boolean argument! Try 0 or 1");
+}
+
+// parser<int> implementation
+//
+bool parser<int>::parse(Option &O, StringRef ArgName,
+ StringRef Arg, int &Value) {
+ if (Arg.getAsInteger(0, Value))
+ return O.error("'" + Arg + "' value invalid for integer argument!");
+ return false;
+}
+
+// parser<unsigned> implementation
+//
+bool parser<unsigned>::parse(Option &O, StringRef ArgName,
+ StringRef Arg, unsigned &Value) {
+
+ if (Arg.getAsInteger(0, Value))
+ return O.error("'" + Arg + "' value invalid for uint argument!");
+ return false;
+}
+
+// parser<double>/parser<float> implementation
+//
+static bool parseDouble(Option &O, StringRef Arg, double &Value) {
+ SmallString<32> TmpStr(Arg.begin(), Arg.end());
+ const char *ArgStart = TmpStr.c_str();
+ char *End;
+ Value = strtod(ArgStart, &End);
+ if (*End != 0)
+ return O.error("'" + Arg + "' value invalid for floating point argument!");
+ return false;
+}
+
+bool parser<double>::parse(Option &O, StringRef ArgName,
+ StringRef Arg, double &Val) {
+ return parseDouble(O, Arg, Val);
+}
+
+bool parser<float>::parse(Option &O, StringRef ArgName,
+ StringRef Arg, float &Val) {
+ double dVal;
+ if (parseDouble(O, Arg, dVal))
+ return true;
+ Val = (float)dVal;
+ return false;
+}
+
+
+
+// generic_parser_base implementation
+//
+
+// findOption - Return the option number corresponding to the specified
+// argument string. If the option is not found, getNumOptions() is returned.
+//
+unsigned generic_parser_base::findOption(const char *Name) {
+ unsigned e = getNumOptions();
+
+ for (unsigned i = 0; i != e; ++i) {
+ if (strcmp(getOption(i), Name) == 0)
+ return i;
+ }
+ return e;
+}
+
+
+// Return the width of the option tag for printing...
+size_t generic_parser_base::getOptionWidth(const Option &O) const {
+ if (O.hasArgStr()) {
+ size_t Size = std::strlen(O.ArgStr)+6;
+ for (unsigned i = 0, e = getNumOptions(); i != e; ++i)
+ Size = std::max(Size, std::strlen(getOption(i))+8);
+ return Size;
+ } else {
+ size_t BaseSize = 0;
+ for (unsigned i = 0, e = getNumOptions(); i != e; ++i)
+ BaseSize = std::max(BaseSize, std::strlen(getOption(i))+8);
+ return BaseSize;
+ }
+}
+
+// printOptionInfo - Print out information about this option. The
+// to-be-maintained width is specified.
+//
+void generic_parser_base::printOptionInfo(const Option &O,
+ size_t GlobalWidth) const {
+ if (O.hasArgStr()) {
+ size_t L = std::strlen(O.ArgStr);
+ outs() << " -" << O.ArgStr;
+ outs().indent(GlobalWidth-L-6) << " - " << O.HelpStr << '\n';
+
+ for (unsigned i = 0, e = getNumOptions(); i != e; ++i) {
+ size_t NumSpaces = GlobalWidth-strlen(getOption(i))-8;
+ outs() << " =" << getOption(i);
+ outs().indent(NumSpaces) << " - " << getDescription(i) << '\n';
+ }
+ } else {
+ if (O.HelpStr[0])
+ outs() << " " << O.HelpStr << '\n';
+ for (unsigned i = 0, e = getNumOptions(); i != e; ++i) {
+ size_t L = std::strlen(getOption(i));
+ outs() << " -" << getOption(i);
+ outs().indent(GlobalWidth-L-8) << " - " << getDescription(i) << '\n';
+ }
+ }
+}
+
+
+//===----------------------------------------------------------------------===//
+// --help and --help-hidden option implementation
+//
+
+static int OptNameCompare(const void *LHS, const void *RHS) {
+ typedef std::pair<const char *, Option*> pair_ty;
+
+ return strcmp(((pair_ty*)LHS)->first, ((pair_ty*)RHS)->first);
+}
+
+namespace {
+
+class HelpPrinter {
+ size_t MaxArgLen;
+ const Option *EmptyArg;
+ const bool ShowHidden;
+
+public:
+ explicit HelpPrinter(bool showHidden) : ShowHidden(showHidden) {
+ EmptyArg = 0;
+ }
+
+ void operator=(bool Value) {
+ if (Value == false) return;
+
+ // Get all the options.
+ SmallVector<Option*, 4> PositionalOpts;
+ SmallVector<Option*, 4> SinkOpts;
+ StringMap<Option*> OptMap;
+ GetOptionInfo(PositionalOpts, SinkOpts, OptMap);
+
+ // Copy Options into a vector so we can sort them as we like.
+ SmallVector<std::pair<const char *, Option*>, 128> Opts;
+ SmallPtrSet<Option*, 128> OptionSet; // Duplicate option detection.
+
+ for (StringMap<Option*>::iterator I = OptMap.begin(), E = OptMap.end();
+ I != E; ++I) {
+ // Ignore really-hidden options.
+ if (I->second->getOptionHiddenFlag() == ReallyHidden)
+ continue;
+
+ // Unless showhidden is set, ignore hidden flags.
+ if (I->second->getOptionHiddenFlag() == Hidden && !ShowHidden)
+ continue;
+
+ // If we've already seen this option, don't add it to the list again.
+ if (!OptionSet.insert(I->second))
+ continue;
+
+ Opts.push_back(std::pair<const char *, Option*>(I->getKey().data(),
+ I->second));
+ }
+
+ // Sort the options list alphabetically.
+ qsort(Opts.data(), Opts.size(), sizeof(Opts[0]), OptNameCompare);
+
+ if (ProgramOverview)
+ outs() << "OVERVIEW: " << ProgramOverview << "\n";
+
+ outs() << "USAGE: " << ProgramName << " [options]";
+
+ // Print out the positional options.
+ Option *CAOpt = 0; // The cl::ConsumeAfter option, if it exists...
+ if (!PositionalOpts.empty() &&
+ PositionalOpts[0]->getNumOccurrencesFlag() == ConsumeAfter)
+ CAOpt = PositionalOpts[0];
+
+ for (size_t i = CAOpt != 0, e = PositionalOpts.size(); i != e; ++i) {
+ if (PositionalOpts[i]->ArgStr[0])
+ outs() << " --" << PositionalOpts[i]->ArgStr;
+ outs() << " " << PositionalOpts[i]->HelpStr;
+ }
+
+ // Print the consume after option info if it exists...
+ if (CAOpt) outs() << " " << CAOpt->HelpStr;
+
+ outs() << "\n\n";
+
+ // Compute the maximum argument length...
+ MaxArgLen = 0;
+ for (size_t i = 0, e = Opts.size(); i != e; ++i)
+ MaxArgLen = std::max(MaxArgLen, Opts[i].second->getOptionWidth());
+
+ outs() << "OPTIONS:\n";
+ for (size_t i = 0, e = Opts.size(); i != e; ++i)
+ Opts[i].second->printOptionInfo(MaxArgLen);
+
+ // Print any extra help the user has declared.
+ for (std::vector<const char *>::iterator I = MoreHelp->begin(),
+ E = MoreHelp->end(); I != E; ++I)
+ outs() << *I;
+ MoreHelp->clear();
+
+ // Halt the program since help information was printed
+ exit(1);
+ }
+};
+} // End anonymous namespace
+
+// Define the two HelpPrinter instances that are used to print out help, or
+// help-hidden...
+//
+static HelpPrinter NormalPrinter(false);
+static HelpPrinter HiddenPrinter(true);
+
+static cl::opt<HelpPrinter, true, parser<bool> >
+HOp("help", cl::desc("Display available options (--help-hidden for more)"),
+ cl::location(NormalPrinter), cl::ValueDisallowed);
+
+static cl::opt<HelpPrinter, true, parser<bool> >
+HHOp("help-hidden", cl::desc("Display all available options"),
+ cl::location(HiddenPrinter), cl::Hidden, cl::ValueDisallowed);
+
+static void (*OverrideVersionPrinter)() = 0;
+
+static int TargetArraySortFn(const void *LHS, const void *RHS) {
+ typedef std::pair<const char *, const Target*> pair_ty;
+ return strcmp(((const pair_ty*)LHS)->first, ((const pair_ty*)RHS)->first);
+}
+
+namespace {
+class VersionPrinter {
+public:
+ void print() {
+ raw_ostream &OS = outs();
+ OS << "Low Level Virtual Machine (http://llvm.org/):\n"
+ << " " << PACKAGE_NAME << " version " << PACKAGE_VERSION;
+#ifdef LLVM_VERSION_INFO
+ OS << LLVM_VERSION_INFO;
+#endif
+ OS << "\n ";
+#ifndef __OPTIMIZE__
+ OS << "DEBUG build";
+#else
+ OS << "Optimized build";
+#endif
+#ifndef NDEBUG
+ OS << " with assertions";
+#endif
+ std::string CPU = sys::getHostCPUName();
+ if (CPU == "generic") CPU = "(unknown)";
+ OS << ".\n"
+ << " Built " << __DATE__ << " (" << __TIME__ << ").\n"
+ << " Host: " << sys::getHostTriple() << '\n'
+ << " Host CPU: " << CPU << '\n'
+ << '\n'
+ << " Registered Targets:\n";
+
+ std::vector<std::pair<const char *, const Target*> > Targets;
+ size_t Width = 0;
+ for (TargetRegistry::iterator it = TargetRegistry::begin(),
+ ie = TargetRegistry::end(); it != ie; ++it) {
+ Targets.push_back(std::make_pair(it->getName(), &*it));
+ Width = std::max(Width, strlen(Targets.back().first));
+ }
+ if (!Targets.empty())
+ qsort(&Targets[0], Targets.size(), sizeof(Targets[0]),
+ TargetArraySortFn);
+
+ for (unsigned i = 0, e = Targets.size(); i != e; ++i) {
+ OS << " " << Targets[i].first;
+ OS.indent(Width - strlen(Targets[i].first)) << " - "
+ << Targets[i].second->getShortDescription() << '\n';
+ }
+ if (Targets.empty())
+ OS << " (none)\n";
+ }
+ void operator=(bool OptionWasSpecified) {
+ if (!OptionWasSpecified) return;
+
+ if (OverrideVersionPrinter == 0) {
+ print();
+ exit(1);
+ }
+ (*OverrideVersionPrinter)();
+ exit(1);
+ }
+};
+} // End anonymous namespace
+
+
+// Define the --version option that prints out the LLVM version for the tool
+static VersionPrinter VersionPrinterInstance;
+
+static cl::opt<VersionPrinter, true, parser<bool> >
+VersOp("version", cl::desc("Display the version of this program"),
+ cl::location(VersionPrinterInstance), cl::ValueDisallowed);
+
+// Utility function for printing the help message.
+void cl::PrintHelpMessage() {
+ // This looks weird, but it actually prints the help message. The
+ // NormalPrinter variable is a HelpPrinter and the help gets printed when
+ // its operator= is invoked. That's because the "normal" usages of the
+ // help printer is to be assigned true/false depending on whether the
+ // --help option was given or not. Since we're circumventing that we have
+ // to make it look like --help was given, so we assign true.
+ NormalPrinter = true;
+}
+
+/// Utility function for printing version number.
+void cl::PrintVersionMessage() {
+ VersionPrinterInstance.print();
+}
+
+void cl::SetVersionPrinter(void (*func)()) {
+ OverrideVersionPrinter = func;
+}