+++ /dev/null
-//===-- CommandLine.cpp - Command line parser implementation --------------===//
-//
-// 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 "Support/CommandLine.h"
-#include <algorithm>
-#include <map>
-#include <set>
-#include <iostream>
-
-using namespace cl;
-
-//===----------------------------------------------------------------------===//
-// Basic, shared command line option processing machinery...
-//
-
-// Return the global command line option vector. Making it a function scoped
-// static ensures that it will be initialized correctly before its first use.
-//
-static std::map<std::string, Option*> *CommandLineOptions = 0;
-static std::map<std::string, Option*> &getOpts() {
- if (CommandLineOptions == 0)
- CommandLineOptions = new std::map<std::string,Option*>();
- return *CommandLineOptions;
-}
-
-static Option *getOption(const std::string &Str) {
- if (CommandLineOptions == 0) return 0;
- std::map<std::string,Option*>::iterator I = CommandLineOptions->find(Str);
- return I != CommandLineOptions->end() ? I->second : 0;
-}
-
-static std::vector<Option*> &getPositionalOpts() {
- static std::vector<Option*> Positional;
- return Positional;
-}
-
-static void AddArgument(const char *ArgName, Option *Opt) {
- if (getOption(ArgName)) {
- std::cerr << "CommandLine Error: Argument '" << ArgName
- << "' defined more than once!\n";
- } else {
- // Add argument to the argument map!
- getOpts()[ArgName] = Opt;
- }
-}
-
-// RemoveArgument - It's possible that the argument is no longer in the map if
-// options have already been processed and the map has been deleted!
-//
-static void RemoveArgument(const char *ArgName, Option *Opt) {
- if (CommandLineOptions == 0) return;
- assert(getOption(ArgName) == Opt && "Arg not in map!");
- CommandLineOptions->erase(ArgName);
- if (CommandLineOptions->empty()) {
- delete CommandLineOptions;
- CommandLineOptions = 0;
- }
-}
-
-static const char *ProgramName = 0;
-static const char *ProgramOverview = 0;
-
-static inline bool ProvideOption(Option *Handler, const char *ArgName,
- const char *Value, int argc, char **argv,
- int &i) {
- // Enforce value requirements
- switch (Handler->getValueExpectedFlag()) {
- case ValueRequired:
- if (Value == 0 || *Value == 0) { // No value specified?
- if (i+1 < argc) { // Steal the next argument, like for '-o filename'
- Value = argv[++i];
- } else {
- return Handler->error(" requires a value!");
- }
- }
- break;
- case ValueDisallowed:
- if (*Value != 0)
- return Handler->error(" does not allow a value! '" +
- std::string(Value) + "' specified.");
- break;
- case ValueOptional: break;
- default: std::cerr << "Bad ValueMask flag! CommandLine usage error:"
- << Handler->getValueExpectedFlag() << "\n"; abort();
- }
-
- // Run the handler now!
- return Handler->addOccurrence(ArgName, Value);
-}
-
-static bool ProvidePositionalOption(Option *Handler, const std::string &Arg) {
- int Dummy;
- return ProvideOption(Handler, Handler->ArgStr, Arg.c_str(), 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(std::string Name, unsigned &Length,
- bool (*Pred)(const Option*)) {
-
- Option *Op = getOption(Name);
- if (Op && Pred(Op)) {
- Length = Name.length();
- return Op;
- }
-
- if (Name.size() == 1) return 0;
- do {
- Name.erase(Name.end()-1, Name.end()); // Chop off the last character...
- Op = getOption(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 ((Op == 0 || !Pred(Op)) && Name.size() > 1);
-
- if (Op && Pred(Op)) {
- Length = Name.length();
- return Op; // Found one!
- }
- return 0; // No option found!
-}
-
-static bool RequiresValue(const Option *O) {
- return O->getNumOccurrencesFlag() == cl::Required ||
- O->getNumOccurrencesFlag() == cl::OneOrMore;
-}
-
-static bool EatsUnboundedNumberOfValues(const Option *O) {
- return O->getNumOccurrencesFlag() == cl::ZeroOrMore ||
- O->getNumOccurrencesFlag() == cl::OneOrMore;
-}
-
-/// ParseCStringVector - Break INPUT up wherever one or more
-/// whitespace characters are found, and store the resulting tokens in
-/// OUTPUT. The tokens stored in OUTPUT are dynamically allocated
-/// using strdup (), so it is the caller's responsibility to free ()
-/// them later.
-///
-static void ParseCStringVector (std::vector<char *> &output,
- const char *input) {
- // Characters which will be treated as token separators:
- static const char *delims = " \v\f\t\r\n";
-
- std::string work (input);
- // Skip past any delims at head of input string.
- size_t pos = work.find_first_not_of (delims);
- // If the string consists entirely of delims, then exit early.
- if (pos == std::string::npos) return;
- // Otherwise, jump forward to beginning of first word.
- work = work.substr (pos);
- // Find position of first delimiter.
- pos = work.find_first_of (delims);
-
- while (!work.empty() && pos != std::string::npos) {
- // Everything from 0 to POS is the next word to copy.
- output.push_back (strdup (work.substr (0,pos).c_str ()));
- // Is there another word in the string?
- size_t nextpos = work.find_first_not_of (delims, pos + 1);
- if (nextpos != std::string::npos) {
- // Yes? Then remove delims from beginning ...
- work = work.substr (work.find_first_not_of (delims, pos + 1));
- // and find the end of the word.
- pos = work.find_first_of (delims);
- } else {
- // No? (Remainder of string is delims.) End the loop.
- work = "";
- pos = std::string::npos;
- }
- }
-
- // If `input' ended with non-delim char, then we'll get here with
- // the last word of `input' in `work'; copy it now.
- if (!work.empty ()) {
- output.push_back (strdup (work.c_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.
- std::vector<char *> newArgv;
- newArgv.push_back (strdup (progName));
-
- // Parse the value of the environment variable into a "command line"
- // and hand it off to ParseCommandLineOptions().
- ParseCStringVector (newArgv, envValue);
- int newArgc = newArgv.size ();
- ParseCommandLineOptions (newArgc, &newArgv[0], Overview);
-
- // Free all the strdup()ed strings.
- for (std::vector<char *>::iterator i = newArgv.begin (), e = newArgv.end ();
- i != e; ++i) {
- free (*i);
- }
-}
-
-void cl::ParseCommandLineOptions(int &argc, char **argv,
- const char *Overview) {
- assert((!getOpts().empty() || !getPositionalOpts().empty()) &&
- "No options specified, or ParseCommandLineOptions called more"
- " than once!");
- ProgramName = argv[0]; // Save this away safe and snug
- ProgramOverview = Overview;
- bool ErrorParsing = false;
-
- std::map<std::string, Option*> &Opts = getOpts();
- std::vector<Option*> &PositionalOpts = getPositionalOpts();
-
- // Check out the positional arguments to collect information about them.
- unsigned NumPositionalRequired = 0;
- 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 (unsigned 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);
- }
- }
-
- // PositionalVals - A vector of "positional" arguments we accumulate into to
- // processes at the end...
- //
- std::vector<std::string> 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;
- const char *Value = "";
- const char *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]);
- continue; // We are done!
- } else if (!PositionalOpts.empty()) {
- PositionalVals.push_back(argv[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(argv[i]);
- break; // Handle outside of the argument processing loop...
- }
-
- // Delay processing positional arguments until the end...
- continue;
- }
- } else { // We start with a '-', must be an argument...
- ArgName = argv[i]+1;
- while (*ArgName == '-') ++ArgName; // Eat leading dashes
-
- if (*ArgName == 0 && !DashDashFound) { // Is this the mythical "--"?
- DashDashFound = true; // Yup, take note of that fact...
- continue; // Don't try to process it as an argument itself.
- }
-
- const char *ArgNameEnd = ArgName;
- while (*ArgNameEnd && *ArgNameEnd != '=')
- ++ArgNameEnd; // Scan till end of argument name...
-
- Value = ArgNameEnd;
- if (*Value) // If we have an equals sign...
- ++Value; // Advance to value...
-
- if (*ArgName != 0) {
- std::string RealName(ArgName, ArgNameEnd);
- // Extract arg name part
- std::map<std::string, Option*>::iterator I = Opts.find(RealName);
-
- if (I == Opts.end() && !*Value && RealName.size() > 1) {
- // Check to see if this "option" is really a prefixed or grouped
- // argument...
- //
- unsigned Length = 0;
- Option *PGOpt = getOptionPred(RealName, Length, isPrefixedOrGrouping);
-
- // 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 && PGOpt->getFormattingFlag() == cl::Prefix) {
- ArgNameEnd = ArgName+Length;
- Value = ArgNameEnd;
- I = Opts.find(std::string(ArgName, ArgNameEnd));
- assert(I->second == PGOpt);
- } else if (PGOpt) {
- // This must be a grouped option... handle all of them now...
- assert(isGrouping(PGOpt) && "Broken getOptionPred!");
-
- do {
- // Move current arg name out of RealName into RealArgName...
- std::string RealArgName(RealName.begin(),RealName.begin()+Length);
- RealName.erase(RealName.begin(), RealName.begin()+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;
- ErrorParsing |= ProvideOption(PGOpt, RealArgName.c_str(), "",
- 0, 0, Dummy);
-
- // Get the next grouping option...
- if (!RealName.empty())
- PGOpt = getOptionPred(RealName, Length, isGrouping);
- } while (!RealName.empty() && PGOpt);
-
- if (RealName.empty()) // Processed all of the options, move on
- continue; // to the next argv[] value...
-
- // If RealName is not empty, that means we did not match one of the
- // options! This is an error.
- //
- I = Opts.end();
- }
- }
-
- Handler = I != Opts.end() ? I->second : 0;
- }
- }
-
- if (Handler == 0) {
- std::cerr << "Unknown command line argument '" << argv[i] << "'. Try: '"
- << argv[0] << " --help'\n";
- ErrorParsing = true;
- continue;
- }
-
- // 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) {
- std::string Val(Value);
- std::string::size_type Pos = Val.find(',');
-
- while (Pos != std::string::npos) {
- // Process the portion before the comma...
- ErrorParsing |= ProvideOption(Handler, ArgName,
- std::string(Val.begin(),
- Val.begin()+Pos).c_str(),
- argc, argv, i);
- // Erase the portion before the comma, AND the comma...
- Val.erase(Val.begin(), Val.begin()+Pos+1);
- Value += Pos+1; // Increment the original value pointer as well...
-
- // Check for another comma...
- Pos = Val.find(',');
- }
- }
-
- // 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()) {
- std::cerr << "Not enough positional command line arguments specified!\n"
- << "Must specify at least " << NumPositionalRequired
- << " 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 = PositionalVals.size();
- for (unsigned i = 0, e = PositionalOpts.size(); i != e; ++i) {
- if (RequiresValue(PositionalOpts[i])) {
- ProvidePositionalOption(PositionalOpts[i], PositionalVals[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++]);
- break;
- default:
- assert(0 && "Internal error, unexpected NumOccurrences flag in "
- "positional argument processing!");
- }
- }
- }
- } else {
- assert(ConsumeAfterOpt && NumPositionalRequired <= PositionalVals.size());
- unsigned ValNo = 0;
- for (unsigned j = 1, e = PositionalOpts.size(); j != e; ++j)
- if (RequiresValue(PositionalOpts[j]))
- ErrorParsing |= ProvidePositionalOption(PositionalOpts[j],
- PositionalVals[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++]);
-
- // 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]);
- }
-
- // Loop over args and make sure all required args are specified!
- for (std::map<std::string, Option*>::iterator I = Opts.begin(),
- E = Opts.end(); I != E; ++I) {
- switch (I->second->getNumOccurrencesFlag()) {
- case Required:
- case OneOrMore:
- if (I->second->getNumOccurrences() == 0) {
- I->second->error(" must be specified at least once!");
- ErrorParsing = true;
- }
- // Fall through
- default:
- break;
- }
- }
-
- // Free all of the memory allocated to the map. Command line options may only
- // be processed once!
- delete CommandLineOptions;
- CommandLineOptions = 0;
- PositionalOpts.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(std::string Message, const char *ArgName) {
- if (ArgName == 0) ArgName = ArgStr;
- if (ArgName[0] == 0)
- std::cerr << HelpStr; // Be nice for positional arguments
- else
- std::cerr << "-" << ArgName;
- std::cerr << " option" << Message << "\n";
- return true;
-}
-
-bool Option::addOccurrence(const char *ArgName, const std::string &Value) {
- NumOccurrences++; // Increment the number of times we have been seen
-
- switch (getNumOccurrencesFlag()) {
- case Optional:
- if (NumOccurrences > 1)
- return error(": may only occur zero or one times!", ArgName);
- break;
- case Required:
- if (NumOccurrences > 1)
- return error(": must occur exactly one time!", ArgName);
- // Fall through
- case OneOrMore:
- case ZeroOrMore:
- case ConsumeAfter: break;
- default: return error(": bad num occurrences flag value!");
- }
-
- return handleOccurrence(ArgName, Value);
-}
-
-// addArgument - Tell the system that this Option subclass will handle all
-// occurrences of -ArgStr on the command line.
-//
-void Option::addArgument(const char *ArgStr) {
- if (ArgStr[0])
- AddArgument(ArgStr, this);
-
- if (getFormattingFlag() == Positional)
- getPositionalOpts().push_back(this);
- else if (getNumOccurrencesFlag() == ConsumeAfter) {
- if (!getPositionalOpts().empty() &&
- getPositionalOpts().front()->getNumOccurrencesFlag() == ConsumeAfter)
- error("Cannot specify more than one option with cl::ConsumeAfter!");
- getPositionalOpts().insert(getPositionalOpts().begin(), this);
- }
-}
-
-void Option::removeArgument(const char *ArgStr) {
- if (ArgStr[0])
- RemoveArgument(ArgStr, this);
-
- if (getFormattingFlag() == Positional) {
- std::vector<Option*>::iterator I =
- std::find(getPositionalOpts().begin(), getPositionalOpts().end(), this);
- assert(I != getPositionalOpts().end() && "Arg not registered!");
- getPositionalOpts().erase(I);
- } else if (getNumOccurrencesFlag() == ConsumeAfter) {
- assert(!getPositionalOpts().empty() && getPositionalOpts()[0] == this &&
- "Arg not registered correctly!");
- getPositionalOpts().erase(getPositionalOpts().begin());
- }
-}
-
-
-// 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...
-unsigned alias::getOptionWidth() const {
- return std::strlen(ArgStr)+6;
-}
-
-// Print out the option for the alias...
-void alias::printOptionInfo(unsigned GlobalWidth) const {
- unsigned L = std::strlen(ArgStr);
- std::cerr << " -" << ArgStr << std::string(GlobalWidth-L-6, ' ') << " - "
- << HelpStr << "\n";
-}
-
-
-
-//===----------------------------------------------------------------------===//
-// Parser Implementation code...
-//
-
-// basic_parser implementation
-//
-
-// Return the width of the option tag for printing...
-unsigned basic_parser_impl::getOptionWidth(const Option &O) const {
- unsigned 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,
- unsigned GlobalWidth) const {
- std::cerr << " -" << O.ArgStr;
-
- if (const char *ValName = getValueName())
- std::cerr << "=<" << getValueStr(O, ValName) << ">";
-
- std::cerr << std::string(GlobalWidth-getOptionWidth(O), ' ') << " - "
- << O.HelpStr << "\n";
-}
-
-
-
-
-// parser<bool> implementation
-//
-bool parser<bool>::parse(Option &O, const char *ArgName,
- const std::string &Arg, bool &Value) {
- if (Arg == "" || Arg == "true" || Arg == "TRUE" || Arg == "True" ||
- Arg == "1") {
- Value = true;
- } else if (Arg == "false" || Arg == "FALSE" || Arg == "False" || Arg == "0") {
- Value = false;
- } else {
- return O.error(": '" + Arg +
- "' is invalid value for boolean argument! Try 0 or 1");
- }
- return false;
-}
-
-// parser<int> implementation
-//
-bool parser<int>::parse(Option &O, const char *ArgName,
- const std::string &Arg, int &Value) {
- char *End;
- Value = (int)strtol(Arg.c_str(), &End, 0);
- if (*End != 0)
- return O.error(": '" + Arg + "' value invalid for integer argument!");
- return false;
-}
-
-// parser<unsigned> implementation
-//
-bool parser<unsigned>::parse(Option &O, const char *ArgName,
- const std::string &Arg, unsigned &Value) {
- char *End;
- long long int V = strtoll(Arg.c_str(), &End, 0);
- Value = (unsigned)V;
- if (*End != 0 || V < 0 || Value != V)
- return O.error(": '" + Arg + "' value invalid for uint argument!");
- return false;
-}
-
-// parser<double>/parser<float> implementation
-//
-static bool parseDouble(Option &O, const std::string &Arg, double &Value) {
- const char *ArgStart = Arg.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, const char *AN,
- const std::string &Arg, double &Val) {
- return parseDouble(O, Arg, Val);
-}
-
-bool parser<float>::parse(Option &O, const char *AN,
- const std::string &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 i = 0, e = getNumOptions();
- std::string N(Name);
-
- while (i != e)
- if (getOption(i) == N)
- return i;
- else
- ++i;
- return e;
-}
-
-
-// Return the width of the option tag for printing...
-unsigned generic_parser_base::getOptionWidth(const Option &O) const {
- if (O.hasArgStr()) {
- unsigned Size = std::strlen(O.ArgStr)+6;
- for (unsigned i = 0, e = getNumOptions(); i != e; ++i)
- Size = std::max(Size, (unsigned)std::strlen(getOption(i))+8);
- return Size;
- } else {
- unsigned BaseSize = 0;
- for (unsigned i = 0, e = getNumOptions(); i != e; ++i)
- BaseSize = std::max(BaseSize, (unsigned)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,
- unsigned GlobalWidth) const {
- if (O.hasArgStr()) {
- unsigned L = std::strlen(O.ArgStr);
- std::cerr << " -" << O.ArgStr << std::string(GlobalWidth-L-6, ' ')
- << " - " << O.HelpStr << "\n";
-
- for (unsigned i = 0, e = getNumOptions(); i != e; ++i) {
- unsigned NumSpaces = GlobalWidth-strlen(getOption(i))-8;
- std::cerr << " =" << getOption(i) << std::string(NumSpaces, ' ')
- << " - " << getDescription(i) << "\n";
- }
- } else {
- if (O.HelpStr[0])
- std::cerr << " " << O.HelpStr << "\n";
- for (unsigned i = 0, e = getNumOptions(); i != e; ++i) {
- unsigned L = std::strlen(getOption(i));
- std::cerr << " -" << getOption(i) << std::string(GlobalWidth-L-8, ' ')
- << " - " << getDescription(i) << "\n";
- }
- }
-}
-
-
-//===----------------------------------------------------------------------===//
-// --help and --help-hidden option implementation
-//
-namespace {
-
-class HelpPrinter {
- unsigned MaxArgLen;
- const Option *EmptyArg;
- const bool ShowHidden;
-
- // isHidden/isReallyHidden - Predicates to be used to filter down arg lists.
- inline static bool isHidden(std::pair<std::string, Option *> &OptPair) {
- return OptPair.second->getOptionHiddenFlag() >= Hidden;
- }
- inline static bool isReallyHidden(std::pair<std::string, Option *> &OptPair) {
- return OptPair.second->getOptionHiddenFlag() == ReallyHidden;
- }
-
-public:
- HelpPrinter(bool showHidden) : ShowHidden(showHidden) {
- EmptyArg = 0;
- }
-
- void operator=(bool Value) {
- if (Value == false) return;
-
- // Copy Options into a vector so we can sort them as we like...
- std::vector<std::pair<std::string, Option*> > Options;
- copy(getOpts().begin(), getOpts().end(), std::back_inserter(Options));
-
- // Eliminate Hidden or ReallyHidden arguments, depending on ShowHidden
- Options.erase(std::remove_if(Options.begin(), Options.end(),
- std::ptr_fun(ShowHidden ? isReallyHidden : isHidden)),
- Options.end());
-
- // Eliminate duplicate entries in table (from enum flags options, f.e.)
- { // Give OptionSet a scope
- std::set<Option*> OptionSet;
- for (unsigned i = 0; i != Options.size(); ++i)
- if (OptionSet.count(Options[i].second) == 0)
- OptionSet.insert(Options[i].second); // Add new entry to set
- else
- Options.erase(Options.begin()+i--); // Erase duplicate
- }
-
- if (ProgramOverview)
- std::cerr << "OVERVIEW:" << ProgramOverview << "\n";
-
- std::cerr << "USAGE: " << ProgramName << " [options]";
-
- // Print out the positional options...
- std::vector<Option*> &PosOpts = getPositionalOpts();
- Option *CAOpt = 0; // The cl::ConsumeAfter option, if it exists...
- if (!PosOpts.empty() && PosOpts[0]->getNumOccurrencesFlag() == ConsumeAfter)
- CAOpt = PosOpts[0];
-
- for (unsigned i = CAOpt != 0, e = PosOpts.size(); i != e; ++i) {
- if (PosOpts[i]->ArgStr[0])
- std::cerr << " --" << PosOpts[i]->ArgStr;
- std::cerr << " " << PosOpts[i]->HelpStr;
- }
-
- // Print the consume after option info if it exists...
- if (CAOpt) std::cerr << " " << CAOpt->HelpStr;
-
- std::cerr << "\n\n";
-
- // Compute the maximum argument length...
- MaxArgLen = 0;
- for (unsigned i = 0, e = Options.size(); i != e; ++i)
- MaxArgLen = std::max(MaxArgLen, Options[i].second->getOptionWidth());
-
- std::cerr << "OPTIONS:\n";
- for (unsigned i = 0, e = Options.size(); i != e; ++i)
- Options[i].second->printOptionInfo(MaxArgLen);
-
- // Halt the program if help information is printed
- exit(1);
- }
-};
-
-
-
-// Define the two HelpPrinter instances that are used to print out help, or
-// help-hidden...
-//
-HelpPrinter NormalPrinter(false);
-HelpPrinter HiddenPrinter(true);
-
-cl::opt<HelpPrinter, true, parser<bool> >
-HOp("help", cl::desc("display available options (--help-hidden for more)"),
- cl::location(NormalPrinter), cl::ValueDisallowed);
-
-cl::opt<HelpPrinter, true, parser<bool> >
-HHOp("help-hidden", cl::desc("display all available options"),
- cl::location(HiddenPrinter), cl::Hidden, cl::ValueDisallowed);
-
-} // End anonymous namespace
projects / oota-llvm.git / blobdiff