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Diffstat (limited to 'contrib/llvm/lib/Support/CommandLine.cpp')
| -rw-r--r-- | contrib/llvm/lib/Support/CommandLine.cpp | 1858 |
1 files changed, 1858 insertions, 0 deletions
diff --git a/contrib/llvm/lib/Support/CommandLine.cpp b/contrib/llvm/lib/Support/CommandLine.cpp new file mode 100644 index 0000000..dcaacf6 --- /dev/null +++ b/contrib/llvm/lib/Support/CommandLine.cpp @@ -0,0 +1,1858 @@ +//===-- 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-c/Support.h" +#include "llvm/ADT/ArrayRef.h" +#include "llvm/ADT/STLExtras.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 "llvm/Support/ConvertUTF.h" +#include "llvm/Support/Debug.h" +#include "llvm/Support/ErrorHandling.h" +#include "llvm/Support/Host.h" +#include "llvm/Support/ManagedStatic.h" +#include "llvm/Support/MemoryBuffer.h" +#include "llvm/Support/Path.h" +#include "llvm/Support/StringSaver.h" +#include "llvm/Support/raw_ostream.h" +#include <cstdlib> +#include <map> +using namespace llvm; +using namespace cl; + +#define DEBUG_TYPE "commandline" + +//===----------------------------------------------------------------------===// +// 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<unsigned long long>); +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 + +// Pin the vtables to this file. +void GenericOptionValue::anchor() {} +void OptionValue<boolOrDefault>::anchor() {} +void OptionValue<std::string>::anchor() {} +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<unsigned long long>::anchor() {} +void parser<double>::anchor() {} +void parser<float>::anchor() {} +void parser<std::string>::anchor() {} +void parser<char>::anchor() {} + +//===----------------------------------------------------------------------===// + +namespace { + +class CommandLineParser { +public: + // Globals for name and overview of program. Program name is not a string to + // avoid static ctor/dtor issues. + std::string ProgramName; + const char *ProgramOverview; + + // This collects additional help to be printed. + std::vector<const char *> MoreHelp; + + SmallVector<Option *, 4> PositionalOpts; + SmallVector<Option *, 4> SinkOpts; + StringMap<Option *> OptionsMap; + + Option *ConsumeAfterOpt; // The ConsumeAfter option if it exists. + + // This collects the different option categories that have been registered. + SmallPtrSet<OptionCategory *, 16> RegisteredOptionCategories; + + CommandLineParser() : ProgramOverview(nullptr), ConsumeAfterOpt(nullptr) {} + + void ParseCommandLineOptions(int argc, const char *const *argv, + const char *Overview); + + void addLiteralOption(Option &Opt, const char *Name) { + if (!Opt.hasArgStr()) { + if (!OptionsMap.insert(std::make_pair(Name, &Opt)).second) { + errs() << ProgramName << ": CommandLine Error: Option '" << Name + << "' registered more than once!\n"; + report_fatal_error("inconsistency in registered CommandLine options"); + } + } + } + + void addOption(Option *O) { + bool HadErrors = false; + if (O->ArgStr[0]) { + // Add argument to the argument map! + if (!OptionsMap.insert(std::make_pair(O->ArgStr, O)).second) { + errs() << ProgramName << ": CommandLine Error: Option '" << O->ArgStr + << "' registered more than once!\n"; + HadErrors = true; + } + } + + // 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 (ConsumeAfterOpt) { + O->error("Cannot specify more than one option with cl::ConsumeAfter!"); + HadErrors = true; + } + ConsumeAfterOpt = O; + } + + // Fail hard if there were errors. These are strictly unrecoverable and + // indicate serious issues such as conflicting option names or an + // incorrectly + // linked LLVM distribution. + if (HadErrors) + report_fatal_error("inconsistency in registered CommandLine options"); + } + + void removeOption(Option *O) { + SmallVector<const char *, 16> OptionNames; + O->getExtraOptionNames(OptionNames); + if (O->ArgStr[0]) + OptionNames.push_back(O->ArgStr); + for (auto Name : OptionNames) + OptionsMap.erase(StringRef(Name)); + + if (O->getFormattingFlag() == cl::Positional) + for (auto Opt = PositionalOpts.begin(); Opt != PositionalOpts.end(); + ++Opt) { + if (*Opt == O) { + PositionalOpts.erase(Opt); + break; + } + } + else if (O->getMiscFlags() & cl::Sink) + for (auto Opt = SinkOpts.begin(); Opt != SinkOpts.end(); ++Opt) { + if (*Opt == O) { + SinkOpts.erase(Opt); + break; + } + } + else if (O == ConsumeAfterOpt) + ConsumeAfterOpt = nullptr; + } + + bool hasOptions() { + return (!OptionsMap.empty() || !PositionalOpts.empty() || + nullptr != ConsumeAfterOpt); + } + + void updateArgStr(Option *O, const char *NewName) { + if (!OptionsMap.insert(std::make_pair(NewName, O)).second) { + errs() << ProgramName << ": CommandLine Error: Option '" << O->ArgStr + << "' registered more than once!\n"; + report_fatal_error("inconsistency in registered CommandLine options"); + } + OptionsMap.erase(StringRef(O->ArgStr)); + } + + void printOptionValues(); + + void registerCategory(OptionCategory *cat) { + assert(std::count_if(RegisteredOptionCategories.begin(), + RegisteredOptionCategories.end(), + [cat](const OptionCategory *Category) { + return cat->getName() == Category->getName(); + }) == 0 && + "Duplicate option categories"); + + RegisteredOptionCategories.insert(cat); + } + +private: + Option *LookupOption(StringRef &Arg, StringRef &Value); +}; + +} // namespace + +static ManagedStatic<CommandLineParser> GlobalParser; + +void cl::AddLiteralOption(Option &O, const char *Name) { + GlobalParser->addLiteralOption(O, Name); +} + +extrahelp::extrahelp(const char *Help) : morehelp(Help) { + GlobalParser->MoreHelp.push_back(Help); +} + +void Option::addArgument() { + GlobalParser->addOption(this); + FullyInitialized = true; +} + +void Option::removeArgument() { GlobalParser->removeOption(this); } + +void Option::setArgStr(const char *S) { + if (FullyInitialized) + GlobalParser->updateArgStr(this, S); + ArgStr = S; +} + +// Initialise the general option category. +OptionCategory llvm::cl::GeneralCategory("General options"); + +void OptionCategory::registerCategory() { + GlobalParser->registerCategory(this); +} + +//===----------------------------------------------------------------------===// +// Basic, shared command line option processing machinery. +// + +/// 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. +Option *CommandLineParser::LookupOption(StringRef &Arg, StringRef &Value) { + // Reject all dashes. + if (Arg.empty()) + return nullptr; + + 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 : nullptr; + } + + // 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 nullptr; + + Value = Arg.substr(EqualPos + 1); + Arg = Arg.substr(0, EqualPos); + return I->second; +} + +/// LookupNearestOption - Lookup the closest match to 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 *LookupNearestOption(StringRef Arg, + const StringMap<Option *> &OptionsMap, + std::string &NearestString) { + // Reject all dashes. + if (Arg.empty()) + return nullptr; + + // Split on any equal sign. + std::pair<StringRef, StringRef> SplitArg = Arg.split('='); + StringRef &LHS = SplitArg.first; // LHS == Arg when no '=' is present. + StringRef &RHS = SplitArg.second; + + // Find the closest match. + Option *Best = nullptr; + unsigned BestDistance = 0; + for (StringMap<Option *>::const_iterator it = OptionsMap.begin(), + ie = OptionsMap.end(); + it != ie; ++it) { + Option *O = it->second; + SmallVector<const char *, 16> OptionNames; + O->getExtraOptionNames(OptionNames); + if (O->ArgStr[0]) + OptionNames.push_back(O->ArgStr); + + bool PermitValue = O->getValueExpectedFlag() != cl::ValueDisallowed; + StringRef Flag = PermitValue ? LHS : Arg; + for (size_t i = 0, e = OptionNames.size(); i != e; ++i) { + StringRef Name = OptionNames[i]; + unsigned Distance = StringRef(Name).edit_distance( + Flag, /*AllowReplacements=*/true, /*MaxEditDistance=*/BestDistance); + if (!Best || Distance < BestDistance) { + Best = O; + BestDistance = Distance; + if (RHS.empty() || !PermitValue) + NearestString = OptionNames[i]; + else + NearestString = (Twine(OptionNames[i]) + "=" + RHS).str(); + } + } + } + + return Best; +} + +/// CommaSeparateAndAddOccurrence - A wrapper around Handler->addOccurrence() +/// that does special handling of cl::CommaSeparated options. +static bool CommaSeparateAndAddOccurrence(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, + const char *const *argv, int &i) { + // Is this a multi-argument option? + unsigned NumAdditionalVals = Handler->getNumAdditionalVals(); + + // Enforce value requirements + switch (Handler->getValueExpectedFlag()) { + case ValueRequired: + if (!Value.data()) { // No value specified? + if (i + 1 >= argc) + return Handler->error("requires a value!"); + // Steal the next argument, like for '-o filename' + assert(argv && "null check"); + 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; + } + + // If this isn't a multi-arg option, just run the handler. + if (NumAdditionalVals == 0) + return CommaSeparateAndAddOccurrence(Handler, i, ArgName, Value); + + // If it is, run the handle several times. + bool MultiArg = false; + + if (Value.data()) { + if (CommaSeparateAndAddOccurrence(Handler, i, ArgName, Value, MultiArg)) + return true; + --NumAdditionalVals; + MultiArg = true; + } + + while (NumAdditionalVals > 0) { + if (i + 1 >= argc) + return Handler->error("not enough values!"); + assert(argv && "null check"); + Value = argv[++i]; + + if (CommaSeparateAndAddOccurrence(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, nullptr, 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 nullptr; // 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 nullptr; + + // Do the lookup! + size_t Length = 0; + Option *PGOpt = getOptionPred(Arg, Length, isPrefixedOrGrouping, OptionsMap); + if (!PGOpt) + return nullptr; + + // 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, nullptr, 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; +} + +static bool isWhitespace(char C) { return strchr(" \t\n\r\f\v", C); } + +static bool isQuote(char C) { return C == '\"' || C == '\''; } + +static bool isGNUSpecial(char C) { return strchr("\\\"\' ", C); } + +void cl::TokenizeGNUCommandLine(StringRef Src, StringSaver &Saver, + SmallVectorImpl<const char *> &NewArgv, + bool MarkEOLs) { + SmallString<128> Token; + for (size_t I = 0, E = Src.size(); I != E; ++I) { + // Consume runs of whitespace. + if (Token.empty()) { + while (I != E && isWhitespace(Src[I])) { + // Mark the end of lines in response files + if (MarkEOLs && Src[I] == '\n') + NewArgv.push_back(nullptr); + ++I; + } + if (I == E) + break; + } + + // Backslashes can escape backslashes, spaces, and other quotes. Otherwise + // they are literal. This makes it much easier to read Windows file paths. + if (I + 1 < E && Src[I] == '\\' && isGNUSpecial(Src[I + 1])) { + ++I; // Skip the escape. + Token.push_back(Src[I]); + continue; + } + + // Consume a quoted string. + if (isQuote(Src[I])) { + char Quote = Src[I++]; + while (I != E && Src[I] != Quote) { + // Backslashes are literal, unless they escape a special character. + if (Src[I] == '\\' && I + 1 != E && isGNUSpecial(Src[I + 1])) + ++I; + Token.push_back(Src[I]); + ++I; + } + if (I == E) + break; + continue; + } + + // End the token if this is whitespace. + if (isWhitespace(Src[I])) { + if (!Token.empty()) + NewArgv.push_back(Saver.save(Token.c_str())); + Token.clear(); + continue; + } + + // This is a normal character. Append it. + Token.push_back(Src[I]); + } + + // Append the last token after hitting EOF with no whitespace. + if (!Token.empty()) + NewArgv.push_back(Saver.save(Token.c_str())); + // Mark the end of response files + if (MarkEOLs) + NewArgv.push_back(nullptr); +} + +/// Backslashes are interpreted in a rather complicated way in the Windows-style +/// command line, because backslashes are used both to separate path and to +/// escape double quote. This method consumes runs of backslashes as well as the +/// following double quote if it's escaped. +/// +/// * If an even number of backslashes is followed by a double quote, one +/// backslash is output for every pair of backslashes, and the last double +/// quote remains unconsumed. The double quote will later be interpreted as +/// the start or end of a quoted string in the main loop outside of this +/// function. +/// +/// * If an odd number of backslashes is followed by a double quote, one +/// backslash is output for every pair of backslashes, and a double quote is +/// output for the last pair of backslash-double quote. The double quote is +/// consumed in this case. +/// +/// * Otherwise, backslashes are interpreted literally. +static size_t parseBackslash(StringRef Src, size_t I, SmallString<128> &Token) { + size_t E = Src.size(); + int BackslashCount = 0; + // Skip the backslashes. + do { + ++I; + ++BackslashCount; + } while (I != E && Src[I] == '\\'); + + bool FollowedByDoubleQuote = (I != E && Src[I] == '"'); + if (FollowedByDoubleQuote) { + Token.append(BackslashCount / 2, '\\'); + if (BackslashCount % 2 == 0) + return I - 1; + Token.push_back('"'); + return I; + } + Token.append(BackslashCount, '\\'); + return I - 1; +} + +void cl::TokenizeWindowsCommandLine(StringRef Src, StringSaver &Saver, + SmallVectorImpl<const char *> &NewArgv, + bool MarkEOLs) { + SmallString<128> Token; + + // This is a small state machine to consume characters until it reaches the + // end of the source string. + enum { INIT, UNQUOTED, QUOTED } State = INIT; + for (size_t I = 0, E = Src.size(); I != E; ++I) { + // INIT state indicates that the current input index is at the start of + // the string or between tokens. + if (State == INIT) { + if (isWhitespace(Src[I])) { + // Mark the end of lines in response files + if (MarkEOLs && Src[I] == '\n') + NewArgv.push_back(nullptr); + continue; + } + if (Src[I] == '"') { + State = QUOTED; + continue; + } + if (Src[I] == '\\') { + I = parseBackslash(Src, I, Token); + State = UNQUOTED; + continue; + } + Token.push_back(Src[I]); + State = UNQUOTED; + continue; + } + + // UNQUOTED state means that it's reading a token not quoted by double + // quotes. + if (State == UNQUOTED) { + // Whitespace means the end of the token. + if (isWhitespace(Src[I])) { + NewArgv.push_back(Saver.save(Token.c_str())); + Token.clear(); + State = INIT; + // Mark the end of lines in response files + if (MarkEOLs && Src[I] == '\n') + NewArgv.push_back(nullptr); + continue; + } + if (Src[I] == '"') { + State = QUOTED; + continue; + } + if (Src[I] == '\\') { + I = parseBackslash(Src, I, Token); + continue; + } + Token.push_back(Src[I]); + continue; + } + + // QUOTED state means that it's reading a token quoted by double quotes. + if (State == QUOTED) { + if (Src[I] == '"') { + State = UNQUOTED; + continue; + } + if (Src[I] == '\\') { + I = parseBackslash(Src, I, Token); + continue; + } + Token.push_back(Src[I]); + } + } + // Append the last token after hitting EOF with no whitespace. + if (!Token.empty()) + NewArgv.push_back(Saver.save(Token.c_str())); + // Mark the end of response files + if (MarkEOLs) + NewArgv.push_back(nullptr); +} + +// It is called byte order marker but the UTF-8 BOM is actually not affected +// by the host system's endianness. +static bool hasUTF8ByteOrderMark(ArrayRef<char> S) { + return (S.size() >= 3 && S[0] == '\xef' && S[1] == '\xbb' && S[2] == '\xbf'); +} + +static bool ExpandResponseFile(const char *FName, StringSaver &Saver, + TokenizerCallback Tokenizer, + SmallVectorImpl<const char *> &NewArgv, + bool MarkEOLs = false) { + ErrorOr<std::unique_ptr<MemoryBuffer>> MemBufOrErr = + MemoryBuffer::getFile(FName); + if (!MemBufOrErr) + return false; + MemoryBuffer &MemBuf = *MemBufOrErr.get(); + StringRef Str(MemBuf.getBufferStart(), MemBuf.getBufferSize()); + + // If we have a UTF-16 byte order mark, convert to UTF-8 for parsing. + ArrayRef<char> BufRef(MemBuf.getBufferStart(), MemBuf.getBufferEnd()); + std::string UTF8Buf; + if (hasUTF16ByteOrderMark(BufRef)) { + if (!convertUTF16ToUTF8String(BufRef, UTF8Buf)) + return false; + Str = StringRef(UTF8Buf); + } + // If we see UTF-8 BOM sequence at the beginning of a file, we shall remove + // these bytes before parsing. + // Reference: http://en.wikipedia.org/wiki/UTF-8#Byte_order_mark + else if (hasUTF8ByteOrderMark(BufRef)) + Str = StringRef(BufRef.data() + 3, BufRef.size() - 3); + + // Tokenize the contents into NewArgv. + Tokenizer(Str, Saver, NewArgv, MarkEOLs); + + return true; +} + +/// \brief Expand response files on a command line recursively using the given +/// StringSaver and tokenization strategy. +bool cl::ExpandResponseFiles(StringSaver &Saver, TokenizerCallback Tokenizer, + SmallVectorImpl<const char *> &Argv, + bool MarkEOLs) { + unsigned RspFiles = 0; + bool AllExpanded = true; + + // Don't cache Argv.size() because it can change. + for (unsigned I = 0; I != Argv.size();) { + const char *Arg = Argv[I]; + // Check if it is an EOL marker + if (Arg == nullptr) { + ++I; + continue; + } + if (Arg[0] != '@') { + ++I; + continue; + } + + // If we have too many response files, leave some unexpanded. This avoids + // crashing on self-referential response files. + if (RspFiles++ > 20) + return false; + + // Replace this response file argument with the tokenization of its + // contents. Nested response files are expanded in subsequent iterations. + // FIXME: If a nested response file uses a relative path, is it relative to + // the cwd of the process or the response file? + SmallVector<const char *, 0> ExpandedArgv; + if (!ExpandResponseFile(Arg + 1, Saver, Tokenizer, ExpandedArgv, + MarkEOLs)) { + // We couldn't read this file, so we leave it in the argument stream and + // move on. + AllExpanded = false; + ++I; + continue; + } + Argv.erase(Argv.begin() + I); + Argv.insert(Argv.begin() + I, ExpandedArgv.begin(), ExpandedArgv.end()); + } + return AllExpanded; +} + +/// 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) { + // 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. + SmallVector<const char *, 20> newArgv; + BumpPtrAllocator A; + BumpPtrStringSaver Saver(A); + newArgv.push_back(Saver.save(progName)); + + // Parse the value of the environment variable into a "command line" + // and hand it off to ParseCommandLineOptions(). + TokenizeGNUCommandLine(envValue, Saver, newArgv); + int newArgc = static_cast<int>(newArgv.size()); + ParseCommandLineOptions(newArgc, &newArgv[0], Overview); +} + +void cl::ParseCommandLineOptions(int argc, const char *const *argv, + const char *Overview) { + GlobalParser->ParseCommandLineOptions(argc, argv, Overview); +} + +void CommandLineParser::ParseCommandLineOptions(int argc, + const char *const *argv, + const char *Overview) { + assert(hasOptions() && "No options specified!"); + + // Expand response files. + SmallVector<const char *, 20> newArgv(argv, argv + argc); + BumpPtrAllocator A; + BumpPtrStringSaver Saver(A); + ExpandResponseFiles(Saver, TokenizeGNUCommandLine, newArgv); + argv = &newArgv[0]; + argc = static_cast<int>(newArgv.size()); + + // Copy the program name into ProgName, making sure not to overflow it. + ProgramName = sys::path::filename(argv[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; + + if (ConsumeAfterOpt) { + assert(PositionalOpts.size() > 0 && + "Cannot specify cl::ConsumeAfter without a positional argument!"); + } + if (!PositionalOpts.empty()) { + + // Calculate how many positional values are _required_. + bool UnboundedFound = false; + for (size_t i = 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() > 1) + 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!"); + errs() << ProgramName << ": CommandLine Error: Option '" << Opt->ArgStr + << "' is all messed up!\n"; + errs() << PositionalOpts.size(); + } + 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 = nullptr; + + // Loop over all of the arguments... processing them. + bool DashDashFound = false; // Have we read '--'? + for (int i = 1; i < argc; ++i) { + Option *Handler = nullptr; + Option *NearestHandler = nullptr; + std::string NearestHandlerString; + StringRef Value; + StringRef ArgName = ""; + + // 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) { + 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); + 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); + + // Check to see if this "option" is really a prefixed or grouped argument. + if (!Handler) + Handler = HandlePrefixedOrGroupedOption(ArgName, Value, ErrorParsing, + OptionsMap); + + // Otherwise, look for the closest available option to report to the user + // in the upcoming error. + if (!Handler && SinkOpts.empty()) + NearestHandler = + LookupNearestOption(ArgName, OptionsMap, NearestHandlerString); + } + + if (!Handler) { + if (SinkOpts.empty()) { + errs() << ProgramName << ": Unknown command line argument '" << argv[i] + << "'. Try: '" << argv[0] << " -help'\n"; + + if (NearestHandler) { + // If we know a near match, report it as well. + errs() << ProgramName << ": Did you mean '-" << NearestHandlerString + << "'?\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) { + // 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() == 1 && ValNo == 0 && !PositionalVals.empty()) { + ErrorParsing |= ProvidePositionalOption(PositionalOpts[0], + 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 (const auto &Opt : OptionsMap) { + switch (Opt.second->getNumOccurrencesFlag()) { + case Required: + case OneOrMore: + if (Opt.second->getNumOccurrences() == 0) { + Opt.second->error("must be specified at least once!"); + ErrorParsing = true; + } + // Fall through + default: + break; + } + } + + // Now that we know if -debug is specified, we can use it. + // Note that if ReadResponseFiles == true, this must be done before the + // memory allocated for the expanded command line is free()d below. + DEBUG(dbgs() << "Args: "; + for (int i = 0; i < argc; ++i) dbgs() << argv[i] << ' '; + dbgs() << '\n';); + + // Free all of the memory allocated to the map. Command line options may only + // be processed once! + MoreHelp.clear(); + + // 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()) + ArgName = ArgStr; + if (ArgName.empty()) + errs() << HelpStr; // Be nice for positional arguments + else + errs() << GlobalParser->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; + } + + 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; } + +static void printHelpStr(StringRef HelpStr, size_t Indent, + size_t FirstLineIndentedBy) { + std::pair<StringRef, StringRef> Split = HelpStr.split('\n'); + outs().indent(Indent - FirstLineIndentedBy) << " - " << Split.first << "\n"; + while (!Split.second.empty()) { + Split = Split.second.split('\n'); + outs().indent(Indent) << Split.first << "\n"; + } +} + +// Print out the option for the alias. +void alias::printOptionInfo(size_t GlobalWidth) const { + outs() << " -" << ArgStr; + printHelpStr(HelpStr, GlobalWidth, std::strlen(ArgStr) + 6); +} + +//===----------------------------------------------------------------------===// +// 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) << '>'; + + printHelpStr(O.HelpStr, GlobalWidth, getOptionWidth(O)); +} + +void basic_parser_impl::printOptionName(const Option &O, + size_t GlobalWidth) const { + outs() << " -" << O.ArgStr; + outs().indent(GlobalWidth - std::strlen(O.ArgStr)); +} + +// 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<unsigned long long> implementation +// +bool parser<unsigned long long>::parse(Option &O, StringRef ArgName, + StringRef Arg, + unsigned long long &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()) { + outs() << " -" << O.ArgStr; + printHelpStr(O.HelpStr, GlobalWidth, std::strlen(O.ArgStr) + 6); + + 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) { + const char *Option = getOption(i); + outs() << " -" << Option; + printHelpStr(getDescription(i), GlobalWidth, std::strlen(Option) + 8); + } + } +} + +static const size_t MaxOptWidth = 8; // arbitrary spacing for printOptionDiff + +// printGenericOptionDiff - Print the value of this option and it's default. +// +// "Generic" options have each value mapped to a name. +void generic_parser_base::printGenericOptionDiff( + const Option &O, const GenericOptionValue &Value, + const GenericOptionValue &Default, size_t GlobalWidth) const { + outs() << " -" << O.ArgStr; + outs().indent(GlobalWidth - std::strlen(O.ArgStr)); + + unsigned NumOpts = getNumOptions(); + for (unsigned i = 0; i != NumOpts; ++i) { + if (Value.compare(getOptionValue(i))) + continue; + + outs() << "= " << getOption(i); + size_t L = std::strlen(getOption(i)); + size_t NumSpaces = MaxOptWidth > L ? MaxOptWidth - L : 0; + outs().indent(NumSpaces) << " (default: "; + for (unsigned j = 0; j != NumOpts; ++j) { + if (Default.compare(getOptionValue(j))) + continue; + outs() << getOption(j); + break; + } + outs() << ")\n"; + return; + } + outs() << "= *unknown option value*\n"; +} + +// printOptionDiff - Specializations for printing basic value types. +// +#define PRINT_OPT_DIFF(T) \ + void parser<T>::printOptionDiff(const Option &O, T V, OptionValue<T> D, \ + size_t GlobalWidth) const { \ + printOptionName(O, GlobalWidth); \ + std::string Str; \ + { \ + raw_string_ostream SS(Str); \ + SS << V; \ + } \ + outs() << "= " << Str; \ + size_t NumSpaces = \ + MaxOptWidth > Str.size() ? MaxOptWidth - Str.size() : 0; \ + outs().indent(NumSpaces) << " (default: "; \ + if (D.hasValue()) \ + outs() << D.getValue(); \ + else \ + outs() << "*no default*"; \ + outs() << ")\n"; \ + } + +PRINT_OPT_DIFF(bool) +PRINT_OPT_DIFF(boolOrDefault) +PRINT_OPT_DIFF(int) +PRINT_OPT_DIFF(unsigned) +PRINT_OPT_DIFF(unsigned long long) +PRINT_OPT_DIFF(double) +PRINT_OPT_DIFF(float) +PRINT_OPT_DIFF(char) + +void parser<std::string>::printOptionDiff(const Option &O, StringRef V, + OptionValue<std::string> D, + size_t GlobalWidth) const { + printOptionName(O, GlobalWidth); + outs() << "= " << V; + size_t NumSpaces = MaxOptWidth > V.size() ? MaxOptWidth - V.size() : 0; + outs().indent(NumSpaces) << " (default: "; + if (D.hasValue()) + outs() << D.getValue(); + else + outs() << "*no default*"; + outs() << ")\n"; +} + +// Print a placeholder for options that don't yet support printOptionDiff(). +void basic_parser_impl::printOptionNoValue(const Option &O, + size_t GlobalWidth) const { + printOptionName(O, GlobalWidth); + outs() << "= *cannot print option value*\n"; +} + +//===----------------------------------------------------------------------===// +// -help and -help-hidden option implementation +// + +static int OptNameCompare(const std::pair<const char *, Option *> *LHS, + const std::pair<const char *, Option *> *RHS) { + return strcmp(LHS->first, RHS->first); +} + +// Copy Options into a vector so we can sort them as we like. +static void sortOpts(StringMap<Option *> &OptMap, + SmallVectorImpl<std::pair<const char *, Option *>> &Opts, + bool ShowHidden) { + 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).second) + continue; + + Opts.push_back( + std::pair<const char *, Option *>(I->getKey().data(), I->second)); + } + + // Sort the options list alphabetically. + array_pod_sort(Opts.begin(), Opts.end(), OptNameCompare); +} + +namespace { + +class HelpPrinter { +protected: + const bool ShowHidden; + typedef SmallVector<std::pair<const char *, Option *>, 128> + StrOptionPairVector; + // Print the options. Opts is assumed to be alphabetically sorted. + virtual void printOptions(StrOptionPairVector &Opts, size_t MaxArgLen) { + for (size_t i = 0, e = Opts.size(); i != e; ++i) + Opts[i].second->printOptionInfo(MaxArgLen); + } + +public: + explicit HelpPrinter(bool showHidden) : ShowHidden(showHidden) {} + virtual ~HelpPrinter() {} + + // Invoke the printer. + void operator=(bool Value) { + if (!Value) + return; + + StrOptionPairVector Opts; + sortOpts(GlobalParser->OptionsMap, Opts, ShowHidden); + + if (GlobalParser->ProgramOverview) + outs() << "OVERVIEW: " << GlobalParser->ProgramOverview << "\n"; + + outs() << "USAGE: " << GlobalParser->ProgramName << " [options]"; + + for (auto Opt : GlobalParser->PositionalOpts) { + if (Opt->ArgStr[0]) + outs() << " --" << Opt->ArgStr; + outs() << " " << Opt->HelpStr; + } + + // Print the consume after option info if it exists... + if (GlobalParser->ConsumeAfterOpt) + outs() << " " << GlobalParser->ConsumeAfterOpt->HelpStr; + + outs() << "\n\n"; + + // Compute the maximum argument length... + size_t MaxArgLen = 0; + for (size_t i = 0, e = Opts.size(); i != e; ++i) + MaxArgLen = std::max(MaxArgLen, Opts[i].second->getOptionWidth()); + + outs() << "OPTIONS:\n"; + printOptions(Opts, MaxArgLen); + + // Print any extra help the user has declared. + for (auto I : GlobalParser->MoreHelp) + outs() << I; + GlobalParser->MoreHelp.clear(); + + // Halt the program since help information was printed + exit(0); + } +}; + +class CategorizedHelpPrinter : public HelpPrinter { +public: + explicit CategorizedHelpPrinter(bool showHidden) : HelpPrinter(showHidden) {} + + // Helper function for printOptions(). + // It shall return a negative value if A's name should be lexicographically + // ordered before B's name. It returns a value greater equal zero otherwise. + static int OptionCategoryCompare(OptionCategory *const *A, + OptionCategory *const *B) { + return strcmp((*A)->getName(), (*B)->getName()); + } + + // Make sure we inherit our base class's operator=() + using HelpPrinter::operator=; + +protected: + void printOptions(StrOptionPairVector &Opts, size_t MaxArgLen) override { + std::vector<OptionCategory *> SortedCategories; + std::map<OptionCategory *, std::vector<Option *>> CategorizedOptions; + + // Collect registered option categories into vector in preparation for + // sorting. + for (auto I = GlobalParser->RegisteredOptionCategories.begin(), + E = GlobalParser->RegisteredOptionCategories.end(); + I != E; ++I) { + SortedCategories.push_back(*I); + } + + // Sort the different option categories alphabetically. + assert(SortedCategories.size() > 0 && "No option categories registered!"); + array_pod_sort(SortedCategories.begin(), SortedCategories.end(), + OptionCategoryCompare); + + // Create map to empty vectors. + for (std::vector<OptionCategory *>::const_iterator + I = SortedCategories.begin(), + E = SortedCategories.end(); + I != E; ++I) + CategorizedOptions[*I] = std::vector<Option *>(); + + // Walk through pre-sorted options and assign into categories. + // Because the options are already alphabetically sorted the + // options within categories will also be alphabetically sorted. + for (size_t I = 0, E = Opts.size(); I != E; ++I) { + Option *Opt = Opts[I].second; + assert(CategorizedOptions.count(Opt->Category) > 0 && + "Option has an unregistered category"); + CategorizedOptions[Opt->Category].push_back(Opt); + } + + // Now do printing. + for (std::vector<OptionCategory *>::const_iterator + Category = SortedCategories.begin(), + E = SortedCategories.end(); + Category != E; ++Category) { + // Hide empty categories for -help, but show for -help-hidden. + bool IsEmptyCategory = CategorizedOptions[*Category].size() == 0; + if (!ShowHidden && IsEmptyCategory) + continue; + + // Print category information. + outs() << "\n"; + outs() << (*Category)->getName() << ":\n"; + + // Check if description is set. + if ((*Category)->getDescription() != nullptr) + outs() << (*Category)->getDescription() << "\n\n"; + else + outs() << "\n"; + + // When using -help-hidden explicitly state if the category has no + // options associated with it. + if (IsEmptyCategory) { + outs() << " This option category has no options.\n"; + continue; + } + // Loop over the options in the category and print. + for (std::vector<Option *>::const_iterator + Opt = CategorizedOptions[*Category].begin(), + E = CategorizedOptions[*Category].end(); + Opt != E; ++Opt) + (*Opt)->printOptionInfo(MaxArgLen); + } + } +}; + +// This wraps the Uncategorizing and Categorizing printers and decides +// at run time which should be invoked. +class HelpPrinterWrapper { +private: + HelpPrinter &UncategorizedPrinter; + CategorizedHelpPrinter &CategorizedPrinter; + +public: + explicit HelpPrinterWrapper(HelpPrinter &UncategorizedPrinter, + CategorizedHelpPrinter &CategorizedPrinter) + : UncategorizedPrinter(UncategorizedPrinter), + CategorizedPrinter(CategorizedPrinter) {} + + // Invoke the printer. + void operator=(bool Value); +}; + +} // End anonymous namespace + +// Declare the four HelpPrinter instances that are used to print out help, or +// help-hidden as an uncategorized list or in categories. +static HelpPrinter UncategorizedNormalPrinter(false); +static HelpPrinter UncategorizedHiddenPrinter(true); +static CategorizedHelpPrinter CategorizedNormalPrinter(false); +static CategorizedHelpPrinter CategorizedHiddenPrinter(true); + +// Declare HelpPrinter wrappers that will decide whether or not to invoke +// a categorizing help printer +static HelpPrinterWrapper WrappedNormalPrinter(UncategorizedNormalPrinter, + CategorizedNormalPrinter); +static HelpPrinterWrapper WrappedHiddenPrinter(UncategorizedHiddenPrinter, + CategorizedHiddenPrinter); + +// Define a category for generic options that all tools should have. +static cl::OptionCategory GenericCategory("Generic Options"); + +// Define uncategorized help printers. +// -help-list is hidden by default because if Option categories are being used +// then -help behaves the same as -help-list. +static cl::opt<HelpPrinter, true, parser<bool>> HLOp( + "help-list", + cl::desc("Display list of available options (-help-list-hidden for more)"), + cl::location(UncategorizedNormalPrinter), cl::Hidden, cl::ValueDisallowed, + cl::cat(GenericCategory)); + +static cl::opt<HelpPrinter, true, parser<bool>> + HLHOp("help-list-hidden", cl::desc("Display list of all available options"), + cl::location(UncategorizedHiddenPrinter), cl::Hidden, + cl::ValueDisallowed, cl::cat(GenericCategory)); + +// Define uncategorized/categorized help printers. These printers change their +// behaviour at runtime depending on whether one or more Option categories have +// been declared. +static cl::opt<HelpPrinterWrapper, true, parser<bool>> + HOp("help", cl::desc("Display available options (-help-hidden for more)"), + cl::location(WrappedNormalPrinter), cl::ValueDisallowed, + cl::cat(GenericCategory)); + +static cl::opt<HelpPrinterWrapper, true, parser<bool>> + HHOp("help-hidden", cl::desc("Display all available options"), + cl::location(WrappedHiddenPrinter), cl::Hidden, cl::ValueDisallowed, + cl::cat(GenericCategory)); + +static cl::opt<bool> PrintOptions( + "print-options", + cl::desc("Print non-default options after command line parsing"), + cl::Hidden, cl::init(false), cl::cat(GenericCategory)); + +static cl::opt<bool> PrintAllOptions( + "print-all-options", + cl::desc("Print all option values after command line parsing"), cl::Hidden, + cl::init(false), cl::cat(GenericCategory)); + +void HelpPrinterWrapper::operator=(bool Value) { + if (!Value) + return; + + // Decide which printer to invoke. If more than one option category is + // registered then it is useful to show the categorized help instead of + // uncategorized help. + if (GlobalParser->RegisteredOptionCategories.size() > 1) { + // unhide -help-list option so user can have uncategorized output if they + // want it. + HLOp.setHiddenFlag(NotHidden); + + CategorizedPrinter = true; // Invoke categorized printer + } else + UncategorizedPrinter = true; // Invoke uncategorized printer +} + +// Print the value of each option. +void cl::PrintOptionValues() { GlobalParser->printOptionValues(); } + +void CommandLineParser::printOptionValues() { + if (!PrintOptions && !PrintAllOptions) + return; + + SmallVector<std::pair<const char *, Option *>, 128> Opts; + sortOpts(OptionsMap, Opts, /*ShowHidden*/ true); + + // Compute the maximum argument length... + size_t MaxArgLen = 0; + for (size_t i = 0, e = Opts.size(); i != e; ++i) + MaxArgLen = std::max(MaxArgLen, Opts[i].second->getOptionWidth()); + + for (size_t i = 0, e = Opts.size(); i != e; ++i) + Opts[i].second->printOptionValue(MaxArgLen, PrintAllOptions); +} + +static void (*OverrideVersionPrinter)() = nullptr; + +static std::vector<void (*)()> *ExtraVersionPrinters = nullptr; + +namespace { +class VersionPrinter { +public: + void print() { + raw_ostream &OS = outs(); + OS << "LLVM (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" +#if (ENABLE_TIMESTAMPS == 1) + << " Built " << __DATE__ << " (" << __TIME__ << ").\n" +#endif + << " Default target: " << sys::getDefaultTargetTriple() << '\n' + << " Host CPU: " << CPU << '\n'; + } + void operator=(bool OptionWasSpecified) { + if (!OptionWasSpecified) + return; + + if (OverrideVersionPrinter != nullptr) { + (*OverrideVersionPrinter)(); + exit(0); + } + print(); + + // Iterate over any registered extra printers and call them to add further + // information. + if (ExtraVersionPrinters != nullptr) { + outs() << '\n'; + for (std::vector<void (*)()>::iterator I = ExtraVersionPrinters->begin(), + E = ExtraVersionPrinters->end(); + I != E; ++I) + (*I)(); + } + + exit(0); + } +}; +} // 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, + cl::cat(GenericCategory)); + +// Utility function for printing the help message. +void cl::PrintHelpMessage(bool Hidden, bool Categorized) { + // This looks weird, but it actually prints the help message. The Printers are + // types of 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 -help or -help-hidden was given or + // not. Since we're circumventing that we have to make it look like -help or + // -help-hidden were given, so we assign true. + + if (!Hidden && !Categorized) + UncategorizedNormalPrinter = true; + else if (!Hidden && Categorized) + CategorizedNormalPrinter = true; + else if (Hidden && !Categorized) + UncategorizedHiddenPrinter = true; + else + CategorizedHiddenPrinter = true; +} + +/// Utility function for printing version number. +void cl::PrintVersionMessage() { VersionPrinterInstance.print(); } + +void cl::SetVersionPrinter(void (*func)()) { OverrideVersionPrinter = func; } + +void cl::AddExtraVersionPrinter(void (*func)()) { + if (!ExtraVersionPrinters) + ExtraVersionPrinters = new std::vector<void (*)()>; + + ExtraVersionPrinters->push_back(func); +} + +StringMap<Option *> &cl::getRegisteredOptions() { + return GlobalParser->OptionsMap; +} + +void cl::HideUnrelatedOptions(cl::OptionCategory &Category) { + for (auto &I : GlobalParser->OptionsMap) { + if (I.second->Category != &Category && + I.second->Category != &GenericCategory) + I.second->setHiddenFlag(cl::ReallyHidden); + } +} + +void cl::HideUnrelatedOptions(ArrayRef<const cl::OptionCategory *> Categories) { + auto CategoriesBegin = Categories.begin(); + auto CategoriesEnd = Categories.end(); + for (auto &I : GlobalParser->OptionsMap) { + if (std::find(CategoriesBegin, CategoriesEnd, I.second->Category) == + CategoriesEnd && + I.second->Category != &GenericCategory) + I.second->setHiddenFlag(cl::ReallyHidden); + } +} + +void LLVMParseCommandLineOptions(int argc, const char *const *argv, + const char *Overview) { + llvm::cl::ParseCommandLineOptions(argc, argv, Overview); +} |
