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llvm-6502/lib/Support/CommandLine.cpp
Reid Kleckner 431b0a7646 [Support] Beef up and expose the response file parsing in llvm::cl 
The plan is to use it for clang and lld.

Major behavior changes:
- We can now parse UTF-16 files that have a byte order mark.
- PR16209: Don't drop backslashes on the floor if they don't escape
  anything.

The actual parsing loop was based on code from Clang's driver.cpp,
although it's been rewritten to track its state with control flow rather
than state variables.

Reviewers: hans

Differential Revision: http://llvm-reviews.chandlerc.com/D1170

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@186587 91177308-0d34-0410-b5e6-96231b3b80d8
2013-07-18 16:52:05 +00:00

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//===-- 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/ADT/ArrayRef.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 "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/raw_ostream.h"
#include "llvm/Support/system_error.h"
#include <cerrno>
#include <cstdlib>
#include <map>
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<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
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() {}
//===----------------------------------------------------------------------===//
// 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();
}
// This collects the different option categories that have been registered.
typedef SmallPtrSet<OptionCategory*,16> OptionCatSet;
static ManagedStatic<OptionCatSet> RegisteredOptionCategories;
// Initialise the general option category.
OptionCategory llvm::cl::GeneralCategory("General options");
void OptionCategory::registerCategory()
{
RegisteredOptionCategories->insert(this);
}
//===----------------------------------------------------------------------===//
// 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;
}
/// 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 0;
// 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 = 0;
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 = std::string(OptionNames[i]) + "=" + RHS.str();
}
}
}
return Best;
}
/// 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,
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() == 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;
}
// 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;
}
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) {
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]))
++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.SaveString(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.SaveString(Token.c_str()));
}
void cl::TokenizeWindowsCommandLine(StringRef Src, StringSaver &Saver,
SmallVectorImpl<const char *> &NewArgv) {
llvm_unreachable("FIXME not implemented");
}
static bool ExpandResponseFile(const char *FName, StringSaver &Saver,
TokenizerCallback Tokenizer,
SmallVectorImpl<const char *> &NewArgv) {
OwningPtr<MemoryBuffer> MemBuf;
if (MemoryBuffer::getFile(FName, MemBuf))
return false;
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);
}
// Tokenize the contents into NewArgv.
Tokenizer(Str, Saver, NewArgv);
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) {
unsigned RspFiles = 0;
bool AllExpanded = false;
// Don't cache Argv.size() because it can change.
for (unsigned I = 0; I != Argv.size(); ) {
const char *Arg = Argv[I];
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)) {
AllExpanded = false;
continue;
}
Argv.erase(Argv.begin() + I);
Argv.insert(Argv.begin() + I, ExpandedArgv.begin(), ExpandedArgv.end());
}
return AllExpanded;
}
namespace {
class StrDupSaver : public StringSaver {
const char *SaveString(const char *Str) LLVM_OVERRIDE {
return strdup(Str);
}
};
}
/// 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;
newArgv.push_back(strdup(progName));
// Parse the value of the environment variable into a "command line"
// and hand it off to ParseCommandLineOptions().
StrDupSaver Saver;
TokenizeGNUCommandLine(envValue, Saver, newArgv);
int newArgc = static_cast<int>(newArgv.size());
ParseCommandLineOptions(newArgc, &newArgv[0], Overview);
// Free all the strdup()ed strings.
for (SmallVectorImpl<const char *>::iterator i = newArgv.begin(),
e = newArgv.end();
i != e; ++i)
free(const_cast<char *>(*i));
}
void cl::ParseCommandLineOptions(int argc, const char * const *argv,
const char *Overview) {
// 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.
SmallVector<const char *, 20> newArgv;
for (int i = 0; i != argc; ++i)
newArgv.push_back(strdup(argv[i]));
StrDupSaver Saver;
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.
std::string ProgName = sys::path::filename(argv[0]);
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;
Option *NearestHandler = 0;
std::string NearestHandlerString;
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);
// Otherwise, look for the closest available option to report to the user
// in the upcoming error.
if (Handler == 0 && SinkOpts.empty())
NearestHandler = LookupNearestOption(ArgName, Opts,
NearestHandlerString);
}
if (Handler == 0) {
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 == 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;
}
}
// 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!
Opts.clear();
PositionalOpts.clear();
MoreHelp->clear();
// Free the memory allocated by ExpandResponseFiles.
// Free all the strdup()ed strings.
for (SmallVectorImpl<const char *>::iterator i = newArgv.begin(),
e = newArgv.end();
i != e; ++i)
free(const_cast<char *>(*i));
// 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;
}
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 void *LHS, const void *RHS) {
typedef std::pair<const char *, Option*> pair_ty;
return strcmp(((const pair_ty*)LHS)->first, ((const pair_ty*)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))
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);
}
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 == false) return;
// Get all the options.
SmallVector<Option*, 4> PositionalOpts;
SmallVector<Option*, 4> SinkOpts;
StringMap<Option*> OptMap;
GetOptionInfo(PositionalOpts, SinkOpts, OptMap);
StrOptionPairVector Opts;
sortOpts(OptMap, Opts, ShowHidden);
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...
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 (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);
}
};
class CategorizedHelpPrinter : public HelpPrinter {
public:
explicit CategorizedHelpPrinter(bool showHidden) : HelpPrinter(showHidden) {}
// Helper function for printOptions().
// It shall return true if A's name should be lexographically
// ordered before B's name. It returns false otherwise.
static bool OptionCategoryCompare(OptionCategory *A, OptionCategory *B) {
int Length = strcmp(A->getName(), B->getName());
assert(Length != 0 && "Duplicate option categories");
return Length < 0;
}
// Make sure we inherit our base class's operator=()
using HelpPrinter::operator= ;
protected:
virtual void printOptions(StrOptionPairVector &Opts, size_t MaxArgLen) {
std::vector<OptionCategory *> SortedCategories;
std::map<OptionCategory *, std::vector<Option *> > CategorizedOptions;
// Collect registered option categories into vector in preperation for
// sorting.
for (OptionCatSet::const_iterator I = RegisteredOptionCategories->begin(),
E = RegisteredOptionCategories->end();
I != E; ++I)
SortedCategories.push_back(*I);
// Sort the different option categories alphabetically.
assert(SortedCategories.size() > 0 && "No option categories registered!");
std::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() != 0)
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 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);
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);
// 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);
static cl::opt<HelpPrinterWrapper, true, parser<bool> >
HHOp("help-hidden", cl::desc("Display all available options"),
cl::location(WrappedHiddenPrinter), cl::Hidden, cl::ValueDisallowed);
static cl::opt<bool>
PrintOptions("print-options",
cl::desc("Print non-default options after command line parsing"),
cl::Hidden, cl::init(false));
static cl::opt<bool>
PrintAllOptions("print-all-options",
cl::desc("Print all option values after command line parsing"),
cl::Hidden, cl::init(false));
void HelpPrinterWrapper::operator=(bool Value) {
if (Value == false)
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 (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() {
if (!PrintOptions && !PrintAllOptions) return;
// Get all the options.
SmallVector<Option*, 4> PositionalOpts;
SmallVector<Option*, 4> SinkOpts;
StringMap<Option*> OptMap;
GetOptionInfo(PositionalOpts, SinkOpts, OptMap);
SmallVector<std::pair<const char *, Option*>, 128> Opts;
sortOpts(OptMap, 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)() = 0;
static std::vector<void (*)()>* ExtraVersionPrinters = 0;
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 != 0) {
(*OverrideVersionPrinter)();
exit(1);
}
print();
// Iterate over any registered extra printers and call them to add further
// information.
if (ExtraVersionPrinters != 0) {
outs() << '\n';
for (std::vector<void (*)()>::iterator I = ExtraVersionPrinters->begin(),
E = ExtraVersionPrinters->end();
I != E; ++I)
(*I)();
}
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(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 == 0)
ExtraVersionPrinters = new std::vector<void (*)()>;
ExtraVersionPrinters->push_back(func);
}
void cl::getRegisteredOptions(StringMap<Option*> &Map)
{
// Get all the options.
SmallVector<Option*, 4> PositionalOpts; //NOT USED
SmallVector<Option*, 4> SinkOpts; //NOT USED
assert(Map.size() == 0 && "StringMap must be empty");
GetOptionInfo(PositionalOpts, SinkOpts, Map);
return;
}
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