llvm-6502/lib/Option/Option.cpp
Reid Kleckner b0a9ffaeb0 Fix a crash bug in dumping options with groups
Option groups don't have prefixes.  Option dumping is basically dead
code unless there is something wrong with the option table, so this
isn't an important crasher.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@185031 91177308-0d34-0410-b5e6-96231b3b80d8
2013-06-26 22:43:37 +00:00

205 lines
5.6 KiB
C++

//===--- 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 "llvm/Option/Option.h"
#include "llvm/ADT/Twine.h"
#include "llvm/Option/Arg.h"
#include "llvm/Option/ArgList.h"
#include "llvm/Support/ErrorHandling.h"
#include "llvm/Support/raw_ostream.h"
#include <algorithm>
#include <cassert>
using namespace llvm;
using namespace llvm::opt;
Option::Option(const OptTable::Info *info, const OptTable *owner)
: Info(info), Owner(owner) {
// Multi-level aliases are not supported, and alias options cannot
// have groups. This just simplifies option tracking, it is not an
// inherent limitation.
assert((!Info || !getAlias().isValid() || (!getAlias().getAlias().isValid() &&
!getGroup().isValid())) &&
"Multi-level aliases and aliases with groups are unsupported.");
}
Option::~Option() {
}
void Option::dump() const {
llvm::errs() << "<";
switch (getKind()) {
#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
}
if (Info->Prefixes) {
llvm::errs() << " Prefixes:[";
for (const char * const *Pre = Info->Prefixes; *Pre != 0; ++Pre) {
llvm::errs() << '"' << *Pre << (*(Pre + 1) == 0 ? "\"" : "\", ");
}
llvm::errs() << ']';
}
llvm::errs() << " Name:\"" << getName() << '"';
const Option Group = getGroup();
if (Group.isValid()) {
llvm::errs() << " Group:";
Group.dump();
}
const Option Alias = getAlias();
if (Alias.isValid()) {
llvm::errs() << " Alias:";
Alias.dump();
}
if (getKind() == MultiArgClass)
llvm::errs() << " NumArgs:" << getNumArgs();
llvm::errs() << ">\n";
}
bool Option::matches(OptSpecifier Opt) const {
// Aliases are never considered in matching, look through them.
const Option Alias = getAlias();
if (Alias.isValid())
return Alias.matches(Opt);
// Check exact match.
if (getID() == Opt.getID())
return true;
const Option Group = getGroup();
if (Group.isValid())
return Group.matches(Opt);
return false;
}
Arg *Option::accept(const ArgList &Args,
unsigned &Index,
unsigned ArgSize) const {
const Option &UnaliasedOption = getUnaliasedOption();
StringRef Spelling;
// If the option was an alias, get the spelling from the unaliased one.
if (getID() == UnaliasedOption.getID()) {
Spelling = StringRef(Args.getArgString(Index), ArgSize);
} else {
Spelling = Args.MakeArgString(Twine(UnaliasedOption.getPrefix()) +
Twine(UnaliasedOption.getName()));
}
switch (getKind()) {
case FlagClass:
if (ArgSize != strlen(Args.getArgString(Index)))
return 0;
return new Arg(UnaliasedOption, Spelling, Index++);
case JoinedClass: {
const char *Value = Args.getArgString(Index) + ArgSize;
return new Arg(UnaliasedOption, Spelling, Index++, Value);
}
case CommaJoinedClass: {
// Always matches.
const char *Str = Args.getArgString(Index) + ArgSize;
Arg *A = new Arg(UnaliasedOption, Spelling, 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;
}
case SeparateClass:
// Matches iff this is an exact match.
// FIXME: Avoid strlen.
if (ArgSize != strlen(Args.getArgString(Index)))
return 0;
Index += 2;
if (Index > Args.getNumInputArgStrings())
return 0;
return new Arg(UnaliasedOption, Spelling,
Index - 2, Args.getArgString(Index - 1));
case MultiArgClass: {
// Matches iff this is an exact match.
// FIXME: Avoid strlen.
if (ArgSize != strlen(Args.getArgString(Index)))
return 0;
Index += 1 + getNumArgs();
if (Index > Args.getNumInputArgStrings())
return 0;
Arg *A = new Arg(UnaliasedOption, Spelling, Index - 1 - getNumArgs(),
Args.getArgString(Index - getNumArgs()));
for (unsigned i = 1; i != getNumArgs(); ++i)
A->getValues().push_back(Args.getArgString(Index - getNumArgs() + i));
return A;
}
case JoinedOrSeparateClass: {
// If this is not an exact match, it is a joined arg.
// FIXME: Avoid strlen.
if (ArgSize != strlen(Args.getArgString(Index))) {
const char *Value = Args.getArgString(Index) + ArgSize;
return new Arg(*this, Spelling, Index++, Value);
}
// Otherwise it must be separate.
Index += 2;
if (Index > Args.getNumInputArgStrings())
return 0;
return new Arg(UnaliasedOption, Spelling,
Index - 2, Args.getArgString(Index - 1));
}
case JoinedAndSeparateClass:
// Always matches.
Index += 2;
if (Index > Args.getNumInputArgStrings())
return 0;
return new Arg(UnaliasedOption, Spelling, Index - 2,
Args.getArgString(Index - 2) + ArgSize,
Args.getArgString(Index - 1));
default:
llvm_unreachable("Invalid option kind!");
}
}