int DeclarationName::compare(DeclarationName LHS, DeclarationName RHS) {
if (LHS.getNameKind() != RHS.getNameKind())
return (LHS.getNameKind() < RHS.getNameKind() ? -1 : 1);
switch (LHS.getNameKind()) {
case DeclarationName::Identifier: {
IdentifierInfo *LII = LHS.getAsIdentifierInfo();
IdentifierInfo *RII = RHS.getAsIdentifierInfo();
if (!LII) return RII ? -1 : 0;
if (!RII) return 1;
return LII->getName().compare(RII->getName());
}
case DeclarationName::ObjCZeroArgSelector:
case DeclarationName::ObjCOneArgSelector:
case DeclarationName::ObjCMultiArgSelector: {
Selector LHSSelector = LHS.getObjCSelector();
Selector RHSSelector = RHS.getObjCSelector();
unsigned LN = LHSSelector.getNumArgs(), RN = RHSSelector.getNumArgs();
for (unsigned I = 0, N = std::min(LN, RN); I != N; ++I) {
switch (LHSSelector.getNameForSlot(I).compare(
RHSSelector.getNameForSlot(I))) {
case -1:
return true;
case 1:
return false;
default:
break;
}
}
return compareInt(LN, RN);
}
case DeclarationName::CXXConstructorName:
case DeclarationName::CXXDestructorName:
case DeclarationName::CXXConversionFunctionName:
if (QualTypeOrdering()(LHS.getCXXNameType(), RHS.getCXXNameType()))
return -1;
if (QualTypeOrdering()(RHS.getCXXNameType(), LHS.getCXXNameType()))
return 1;
return 0;
case DeclarationName::CXXOperatorName:
return compareInt(LHS.getCXXOverloadedOperator(),
RHS.getCXXOverloadedOperator());
case DeclarationName::CXXLiteralOperatorName:
return LHS.getCXXLiteralIdentifier()->getName().compare(
RHS.getCXXLiteralIdentifier()->getName());
case DeclarationName::CXXUsingDirective:
return 0;
}
return 0;
}
void NilArgChecker::checkPreObjCMessage(const ObjCMethodCall &msg,
CheckerContext &C) const {
const ObjCInterfaceDecl *ID = msg.getReceiverInterface();
if (!ID)
return;
FoundationClass Class = findKnownClass(ID);
static const unsigned InvalidArgIndex = UINT_MAX;
unsigned Arg = InvalidArgIndex;
bool CanBeSubscript = false;
if (Class == FC_NSString) {
Selector S = msg.getSelector();
if (S.isUnarySelector())
return;
// FIXME: This is going to be really slow doing these checks with
// lexical comparisons.
std::string NameStr = S.getAsString();
StringRef Name(NameStr);
assert(!Name.empty());
// FIXME: Checking for initWithFormat: will not work in most cases
// yet because [NSString alloc] returns id, not NSString*. We will
// need support for tracking expected-type information in the analyzer
// to find these errors.
if (Name == "caseInsensitiveCompare:" ||
Name == "compare:" ||
Name == "compare:options:" ||
Name == "compare:options:range:" ||
Name == "compare:options:range:locale:" ||
Name == "componentsSeparatedByCharactersInSet:" ||
Name == "initWithFormat:") {
Arg = 0;
}
} else if (Class == FC_NSArray) {
Selector S = msg.getSelector();
if (S.isUnarySelector())
return;
if (S.getNameForSlot(0).equals("addObject")) {
Arg = 0;
} else if (S.getNameForSlot(0).equals("insertObject") &&
S.getNameForSlot(1).equals("atIndex")) {
Arg = 0;
} else if (S.getNameForSlot(0).equals("replaceObjectAtIndex") &&
S.getNameForSlot(1).equals("withObject")) {
Arg = 1;
} else if (S.getNameForSlot(0).equals("setObject") &&
S.getNameForSlot(1).equals("atIndexedSubscript")) {
Arg = 0;
CanBeSubscript = true;
} else if (S.getNameForSlot(0).equals("arrayByAddingObject")) {
Arg = 0;
}
} else if (Class == FC_NSDictionary) {
Selector S = msg.getSelector();
if (S.isUnarySelector())
return;
if (S.getNameForSlot(0).equals("dictionaryWithObject") &&
S.getNameForSlot(1).equals("forKey")) {
Arg = 0;
WarnIfNilArg(C, msg, /* Arg */1, Class);
} else if (S.getNameForSlot(0).equals("setObject") &&
S.getNameForSlot(1).equals("forKey")) {
Arg = 0;
WarnIfNilArg(C, msg, /* Arg */1, Class);
} else if (S.getNameForSlot(0).equals("setObject") &&
S.getNameForSlot(1).equals("forKeyedSubscript")) {
CanBeSubscript = true;
Arg = 0;
WarnIfNilArg(C, msg, /* Arg */1, Class, CanBeSubscript);
} else if (S.getNameForSlot(0).equals("removeObjectForKey")) {
Arg = 0;
}
}
// If argument is '0', report a warning.
if ((Arg != InvalidArgIndex))
WarnIfNilArg(C, msg, Arg, Class, CanBeSubscript);
}