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//===--- Options.cpp - Option info table --------------------------------*-===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
#include "clang/Driver/Options.h"
#include "clang/Driver/Arg.h"
#include "clang/Driver/ArgList.h"
#include "clang/Driver/Option.h"
#include <cassert>
using namespace clang;
using namespace clang::driver;
using namespace clang::driver::options;
struct Info {
const char *Name;
const char *Flags;
Option::OptionClass Kind;
unsigned GroupID;
unsigned AliasID;
unsigned Param;
};
static Info OptionInfos[] = {
// The InputOption info
{ "<input>", "", Option::InputClass, OPT_INVALID, OPT_INVALID, 0 },
// The UnknownOption info
{ "<unknown>", "", Option::UnknownClass, OPT_INVALID, OPT_INVALID, 0 },
#define OPTION(NAME, ID, KIND, GROUP, ALIAS, FLAGS, PARAM) \
{ NAME, FLAGS, Option::KIND##Class, OPT_##GROUP, OPT_##ALIAS, PARAM },
#include "clang/Driver/Options.def"
};
static const unsigned numOptions = sizeof(OptionInfos) / sizeof(OptionInfos[0]);
static Info &getInfo(unsigned id) {
assert(id > 0 && id - 1 < numOptions && "Invalid Option ID.");
return OptionInfos[id - 1];
}
OptTable::OptTable() : Options(new Option*[numOptions]) {
memset(Options, 0, sizeof(*Options) * numOptions);
}
OptTable::~OptTable() {
for (unsigned i=0; i<numOptions; ++i)
delete Options[i];
delete[] Options;
}
unsigned OptTable::getNumOptions() const {
return numOptions;
}
const char *OptTable::getOptionName(options::ID id) const {
return getInfo(id).Name;
}
const Option *OptTable::getOption(options::ID id) const {
if (id == OPT_INVALID)
return 0;
assert((unsigned) (id - 1) < numOptions && "Invalid ID.");
Option *&Entry = Options[id - 1];
if (!Entry)
Entry = constructOption(id);
return Entry;
}
Option *OptTable::constructOption(options::ID id) const {
Info &info = getInfo(id);
const OptionGroup *Group =
cast_or_null<OptionGroup>(getOption((options::ID) info.GroupID));
const Option *Alias = getOption((options::ID) info.AliasID);
Option *Opt = 0;
switch (info.Kind) {
case Option::InputClass:
Opt = new InputOption(); break;
case Option::UnknownClass:
Opt = new UnknownOption(); break;
case Option::GroupClass:
Opt = new OptionGroup(id, info.Name, Group); break;
case Option::FlagClass:
Opt = new FlagOption(id, info.Name, Group, Alias); break;
case Option::JoinedClass:
Opt = new JoinedOption(id, info.Name, Group, Alias); break;
case Option::SeparateClass:
Opt = new SeparateOption(id, info.Name, Group, Alias); break;
case Option::CommaJoinedClass:
Opt = new CommaJoinedOption(id, info.Name, Group, Alias); break;
case Option::MultiArgClass:
Opt = new MultiArgOption(id, info.Name, Group, Alias, info.Param); break;
case Option::JoinedOrSeparateClass:
Opt = new JoinedOrSeparateOption(id, info.Name, Group, Alias); break;
case Option::JoinedAndSeparateClass:
Opt = new JoinedAndSeparateOption(id, info.Name, Group, Alias); break;
}
for (const char *s = info.Flags; *s; ++s) {
switch (*s) {
default: assert(0 && "Invalid option flag.");
case 'J': Opt->setForceJoinedRender(true); break;
case 'S': Opt->setForceSeparateRender(true); break;
case 'i': Opt->setNoOptAsInput(true); break;
case 'l': Opt->setLinkerInput(true); break;
case 'u': Opt->setUnsupported(true); break;
}
}
return Opt;
}
Arg *OptTable::ParseOneArg(const ArgList &Args, unsigned &Index,
unsigned IndexEnd) const {
const char *Str = Args.getArgString(Index);
// Anything that doesn't start with '-' is an input, as is '-' itself.
if (Str[0] != '-' || Str[1] == '\0')
return new PositionalArg(getOption(OPT_INPUT), Index++);
for (unsigned j = OPT_UNKNOWN + 1; j < LastOption; ++j) {
const char *OptName = getOptionName((options::ID) j);
// Arguments are only accepted by options which prefix them.
if (memcmp(Str, OptName, strlen(OptName)) == 0)
if (Arg *A = getOption((options::ID) j)->accept(Args, Index))
return A;
}
return new PositionalArg(getOption(OPT_UNKNOWN), Index++);
}
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