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Implement the new cl::PositionalEatsArgs flag, refactor code a bit

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@13388 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Chris Lattner 2004-05-06 22:04:31 +00:00
parent be801bf248
commit bf455c2360
1 changed files with 65 additions and 52 deletions
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117
lib/Support/CommandLine.cpp
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@ -213,11 +213,11 @@ static void ParseCStringVector (std::vector<char *> &output,
/// 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) {
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");
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);
@ -242,6 +242,29 @@ void cl::ParseEnvironmentOptions (const char *progName, const char *envVar,
}
}
/// 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,
const char *Overview) {
assert((!getOpts().empty() || !getPositionalOpts().empty()) &&
@ -335,78 +358,68 @@ 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 itself.
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...
} else { // We start with a '-', must be an argument...
ArgName = argv[i]+1;
Handler = LookupOption(ArgName, Value);
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...
//
// 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;
}
}