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//===--- Option.cpp - Abstract Driver Options -----------------------------===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
#include "clang/Driver/Option.h"
#include "clang/Driver/Arg.h"
#include "clang/Driver/ArgList.h"
#include "llvm/Support/raw_ostream.h"
#include <cassert>
#include <algorithm>
using namespace clang::driver;
Option::Option(OptionClass _Kind, OptSpecifier _ID, const char *_Name,
const OptionGroup *_Group, const Option *_Alias)
: Kind(_Kind), ID(_ID.getID()), Name(_Name), Group(_Group), Alias(_Alias),
Unsupported(false), LinkerInput(false), NoOptAsInput(false),
DriverOption(false), NoArgumentUnused(false), NoForward(false) {
// Multi-level aliases are not supported, and alias options cannot
// have groups. This just simplifies option tracking, it is not an
// inherent limitation.
assert((!Alias || (!Alias->Alias && !Group)) &&
"Multi-level aliases and aliases with groups are unsupported.");
// Initialize rendering options based on the class.
switch (Kind) {
case GroupClass:
case InputClass:
case UnknownClass:
RenderStyle = RenderValuesStyle;
break;
case JoinedClass:
case JoinedAndSeparateClass:
RenderStyle = RenderJoinedStyle;
break;
case CommaJoinedClass:
RenderStyle = RenderCommaJoinedStyle;
break;
case FlagClass:
case SeparateClass:
case MultiArgClass:
case JoinedOrSeparateClass:
RenderStyle = RenderSeparateStyle;
break;
}
}
Option::~Option() {
}
void Option::dump() const {
llvm::errs() << "<";
switch (Kind) {
default:
assert(0 && "Invalid kind");
#define P(N) case N: llvm::errs() << #N; break
P(GroupClass);
P(InputClass);
P(UnknownClass);
P(FlagClass);
P(JoinedClass);
P(SeparateClass);
P(CommaJoinedClass);
P(MultiArgClass);
P(JoinedOrSeparateClass);
P(JoinedAndSeparateClass);
#undef P
}
llvm::errs() << " Name:\"" << Name << '"';
if (Group) {
llvm::errs() << " Group:";
Group->dump();
}
if (Alias) {
llvm::errs() << " Alias:";
Alias->dump();
}
if (const MultiArgOption *MOA = dyn_cast<MultiArgOption>(this))
llvm::errs() << " NumArgs:" << MOA->getNumArgs();
llvm::errs() << ">\n";
}
bool Option::matches(OptSpecifier Opt) const {
// Aliases are never considered in matching, look through them.
if (Alias)
return Alias->matches(Opt);
// Check exact match.
if (ID == Opt)
return true;
if (Group)
return Group->matches(Opt);
return false;
}
OptionGroup::OptionGroup(OptSpecifier ID, const char *Name,
const OptionGroup *Group)
: Option(Option::GroupClass, ID, Name, Group, 0) {
}
Arg *OptionGroup::accept(const ArgList &Args, unsigned &Index) const {
assert(0 && "accept() should never be called on an OptionGroup");
return 0;
}
InputOption::InputOption(OptSpecifier ID)
: Option(Option::InputClass, ID, "<input>", 0, 0) {
}
Arg *InputOption::accept(const ArgList &Args, unsigned &Index) const {
assert(0 && "accept() should never be called on an InputOption");
return 0;
}
UnknownOption::UnknownOption(OptSpecifier ID)
: Option(Option::UnknownClass, ID, "<unknown>", 0, 0) {
}
Arg *UnknownOption::accept(const ArgList &Args, unsigned &Index) const {
assert(0 && "accept() should never be called on an UnknownOption");
return 0;
}
FlagOption::FlagOption(OptSpecifier ID, const char *Name,
const OptionGroup *Group, const Option *Alias)
: Option(Option::FlagClass, ID, Name, Group, Alias) {
}
Arg *FlagOption::accept(const ArgList &Args, unsigned &Index) const {
// Matches iff this is an exact match.
// FIXME: Avoid strlen.
if (strlen(getName()) != strlen(Args.getArgString(Index)))
return 0;
return new Arg(getUnaliasedOption(), Index++);
}
JoinedOption::JoinedOption(OptSpecifier ID, const char *Name,
const OptionGroup *Group, const Option *Alias)
: Option(Option::JoinedClass, ID, Name, Group, Alias) {
}
Arg *JoinedOption::accept(const ArgList &Args, unsigned &Index) const {
// Always matches.
const char *Value = Args.getArgString(Index) + strlen(getName());
return new Arg(getUnaliasedOption(), Index++, Value);
}
CommaJoinedOption::CommaJoinedOption(OptSpecifier ID, const char *Name,
const OptionGroup *Group,
const Option *Alias)
: Option(Option::CommaJoinedClass, ID, Name, Group, Alias) {
}
Arg *CommaJoinedOption::accept(const ArgList &Args,
unsigned &Index) const {
// Always matches.
const char *Str = Args.getArgString(Index) + strlen(getName());
Arg *A = new Arg(getUnaliasedOption(), Index++);
// Parse out the comma separated values.
const char *Prev = Str;
for (;; ++Str) {
char c = *Str;
if (!c || c == ',') {
if (Prev != Str) {
char *Value = new char[Str - Prev + 1];
memcpy(Value, Prev, Str - Prev);
Value[Str - Prev] = '\0';
A->getValues().push_back(Value);
}
if (!c)
break;
Prev = Str + 1;
}
}
A->setOwnsValues(true);
return A;
}
SeparateOption::SeparateOption(OptSpecifier ID, const char *Name,
const OptionGroup *Group, const Option *Alias)
: Option(Option::SeparateClass, ID, Name, Group, Alias) {
}
Arg *SeparateOption::accept(const ArgList &Args, unsigned &Index) const {
// Matches iff this is an exact match.
// FIXME: Avoid strlen.
if (strlen(getName()) != strlen(Args.getArgString(Index)))
return 0;
Index += 2;
if (Index > Args.getNumInputArgStrings())
return 0;
return new Arg(getUnaliasedOption(), Index - 2, Args.getArgString(Index - 1));
}
MultiArgOption::MultiArgOption(OptSpecifier ID, const char *Name,
const OptionGroup *Group, const Option *Alias,
unsigned _NumArgs)
: Option(Option::MultiArgClass, ID, Name, Group, Alias), NumArgs(_NumArgs) {
assert(NumArgs > 1 && "Invalid MultiArgOption!");
}
Arg *MultiArgOption::accept(const ArgList &Args, unsigned &Index) const {
// Matches iff this is an exact match.
// FIXME: Avoid strlen.
if (strlen(getName()) != strlen(Args.getArgString(Index)))
return 0;
Index += 1 + NumArgs;
if (Index > Args.getNumInputArgStrings())
return 0;
Arg *A = new Arg(getUnaliasedOption(), Index - 1 - NumArgs,
Args.getArgString(Index - NumArgs));
for (unsigned i = 1; i != NumArgs; ++i)
A->getValues().push_back(Args.getArgString(Index - NumArgs + i));
return A;
}
JoinedOrSeparateOption::JoinedOrSeparateOption(OptSpecifier ID,
const char *Name,
const OptionGroup *Group,
const Option *Alias)
: Option(Option::JoinedOrSeparateClass, ID, Name, Group, Alias) {
}
Arg *JoinedOrSeparateOption::accept(const ArgList &Args,
unsigned &Index) const {
// If this is not an exact match, it is a joined arg.
// FIXME: Avoid strlen.
if (strlen(getName()) != strlen(Args.getArgString(Index))) {
const char *Value = Args.getArgString(Index) + strlen(getName());
return new Arg(this, Index++, Value);
}
// Otherwise it must be separate.
Index += 2;
if (Index > Args.getNumInputArgStrings())
return 0;
return new Arg(getUnaliasedOption(), Index - 2, Args.getArgString(Index - 1));
}
JoinedAndSeparateOption::JoinedAndSeparateOption(OptSpecifier ID,
const char *Name,
const OptionGroup *Group,
const Option *Alias)
: Option(Option::JoinedAndSeparateClass, ID, Name, Group, Alias) {
}
Arg *JoinedAndSeparateOption::accept(const ArgList &Args,
unsigned &Index) const {
// Always matches.
Index += 2;
if (Index > Args.getNumInputArgStrings())
return 0;
return new Arg(getUnaliasedOption(), Index - 2,
Args.getArgString(Index-2)+strlen(getName()),
Args.getArgString(Index-1));
}