//===-- CommandLine.cpp - Command line parser implementation --------------===//
+//
+// The LLVM Compiler Infrastructure
+//
+// This file was developed by the LLVM research group and 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
#include <map>
#include <set>
#include <iostream>
+#include <cstdlib>
+#include <cerrno>
+using namespace llvm;
using namespace cl;
}
static std::vector<Option*> &getPositionalOpts() {
- static std::vector<Option*> Positional;
- return Positional;
+ static std::vector<Option*> *Positional = 0;
+ if (!Positional) Positional = new std::vector<Option*>();
+ return *Positional;
}
static void AddArgument(const char *ArgName, Option *Opt) {
O->getNumOccurrencesFlag() == cl::OneOrMore;
}
-/// ParseStringVector - Break INPUT up wherever one or more characters
-/// from DELIMS are found, and store the resulting tokens in OUTPUT.
+/// 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 ParseStringVector (std::vector<std::string> &output,
- std::string &input, const char *delims) {
+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);
- int pos = work.find_first_not_of (delims);
- if (pos == -1) return;
+ // 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 != -1) {
- if (pos == -1) break;
- output.push_back (work.substr (0,pos));
- int nextpos = work.find_first_not_of (delims, pos + 1);
- if (nextpos != -1) {
+
+ 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 = -1;
+ pos = std::string::npos;
}
}
- if (!work.empty ()) {
- output.push_back (work);
- }
-}
-/// ParseCStringVector - Same effect as ParseStringVector, but the
-/// resulting output vector contains dynamically-allocated pointers to
-/// char, instead of standard C++ strings.
-///
-static void ParseCStringVector (std::vector<char *> &output,
- std::string &input, const char *delims) {
- std::vector<std::string> work;
- ParseStringVector (work, input, delims);
- for (std::vector<std::string>::iterator i = work.begin(), e = work.end();
- i != e; ++i) {
- output.push_back (strdup (i->c_str ()));
+ // 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 ()));
}
}
/// from the caller (as PROGNAME) and its command-line arguments from
/// an environment variable (whose name is given in ENVVAR).
///
-void cl::ParseEnvironmentOptions (char *progName, char *envvar,
- const char *Overview) {
- // Get program's "name", which we wouldn't know without the caller
- // telling us.
- assert (progName && "Program name not specified");
- static std::vector<char *> newargv; // Maybe making it "static" is a hack.
- int newargc;
- newargv.push_back (progName);
-
+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.
- assert (envvar && "Environment variable name missing");
- char *envvalue = getenv (envvar);
- if (envvalue == NULL) {
- // Env var not set --> act like there are no more command line
- // arguments.
- newargc = newargv.size ();
- ParseCommandLineOptions (newargc, &newargv[0], Overview);
+ const char *envValue = getenv (envVar);
+ if (!envValue)
return;
- }
- std::string envvaluestr (envvalue);
+
+ // 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, envvaluestr, " \v\f\t\r\n");
- newargc = newargv.size ();
- ParseCommandLineOptions (newargc, &newargv[0], Overview);
+ 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);
+ }
+}
+
+/// 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.
+static Option *LookupOption(const char *&Arg, const char *&Value) {
+ while (*Arg == '-') ++Arg; // Eat leading dashes
+
+ const char *ArgEnd = Arg;
+ while (*ArgEnd && *ArgEnd != '=')
+ ++ArgEnd; // Scan till end of argument name...
+
+ Value = ArgEnd;
+ if (*Value) // If we have an equals sign...
+ ++Value; // Advance to value...
+
+ if (*Arg == 0) return 0;
+
+ // Look up the option.
+ std::map<std::string, Option*> &Opts = getOpts();
+ std::map<std::string, Option*>::iterator I =
+ Opts.find(std::string(Arg, ArgEnd));
+ return (I != Opts.end()) ? I->second : 0;
}
void cl::ParseCommandLineOptions(int &argc, char **argv,
// Delay processing positional arguments until the end...
continue;
}
- } else { // We start with a '-', must be an argument...
+ } 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;
- 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 iself.
+ Handler = LookupOption(ArgName, Value);
+ if (!Handler || Handler->getFormattingFlag() != cl::Positional) {
+ ProvidePositionalOption(ActivePositionalArg, argv[i]);
+ continue; // We are done!
}
- 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);
+ } else { // We start with a '-', must be an argument...
+ ArgName = argv[i]+1;
+ Handler = LookupOption(ArgName, Value);
- if (I == Opts.end() && !*Value && RealName.size() > 1) {
- // Check to see if this "option" is really a prefixed or grouped
- // argument...
- //
+ // Check to see if this "option" is really a prefixed or grouped argument.
+ if (Handler == 0 && *Value == 0) {
+ std::string RealName(ArgName);
+ if (RealName.size() > 1) {
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);
+ Value = ArgName+Length;
+ assert(Opts.find(std::string(ArgName, Value)) != Opts.end() &&
+ Opts.find(std::string(ArgName, Value))->second == PGOpt);
+ Handler = PGOpt;
} else if (PGOpt) {
- // This must be a grouped option... handle all of them now...
+ // This must be a grouped option... handle 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);
-
+ 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);
-
+ 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();
+ PGOpt = getOptionPred(RealName, Length, isGrouping);
+ } while (PGOpt && Length != RealName.size());
+
+ Handler = PGOpt; // Ate all of the options.
}
}
-
- Handler = I != Opts.end() ? I->second : 0;
}
}
if (Handler == 0) {
- std::cerr << "Unknown command line argument '" << argv[i] << "'. Try: "
+ std::cerr << "Unknown command line argument '" << argv[i] << "'. Try: '"
<< argv[0] << " --help'\n";
ErrorParsing = true;
continue;
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);
+ errno = 0;
+ unsigned long V = strtoul(Arg.c_str(), &End, 0);
Value = (unsigned)V;
- if (*End != 0 || V < 0 || Value != V)
+ if (((V == ULONG_MAX) && (errno == ERANGE))
+ || (*End != 0)
+ || (Value != V))
return O.error(": '" + Arg + "' value invalid for uint argument!");
return false;
}
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