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-rw-r--r--lib/AST/FormatString.cpp993
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diff --git a/lib/AST/FormatString.cpp b/lib/AST/FormatString.cpp
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+// FormatString.cpp - Common stuff for handling printf/scanf formats -*- C++ -*-
+//
+// The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+// Shared details for processing format strings of printf and scanf
+// (and friends).
+//
+//===----------------------------------------------------------------------===//
+
+#include "FormatStringParsing.h"
+#include "clang/Basic/LangOptions.h"
+#include "clang/Basic/TargetInfo.h"
+#include "llvm/Support/ConvertUTF.h"
+
+using clang::analyze_format_string::ArgType;
+using clang::analyze_format_string::FormatStringHandler;
+using clang::analyze_format_string::FormatSpecifier;
+using clang::analyze_format_string::LengthModifier;
+using clang::analyze_format_string::OptionalAmount;
+using clang::analyze_format_string::PositionContext;
+using clang::analyze_format_string::ConversionSpecifier;
+using namespace clang;
+
+// Key function to FormatStringHandler.
+FormatStringHandler::~FormatStringHandler() {}
+
+//===----------------------------------------------------------------------===//
+// Functions for parsing format strings components in both printf and
+// scanf format strings.
+//===----------------------------------------------------------------------===//
+
+OptionalAmount
+clang::analyze_format_string::ParseAmount(const char *&Beg, const char *E) {
+ const char *I = Beg;
+ UpdateOnReturn <const char*> UpdateBeg(Beg, I);
+
+ unsigned accumulator = 0;
+ bool hasDigits = false;
+
+ for ( ; I != E; ++I) {
+ char c = *I;
+ if (c >= '0' && c <= '9') {
+ hasDigits = true;
+ accumulator = (accumulator * 10) + (c - '0');
+ continue;
+ }
+
+ if (hasDigits)
+ return OptionalAmount(OptionalAmount::Constant, accumulator, Beg, I - Beg,
+ false);
+
+ break;
+ }
+
+ return OptionalAmount();
+}
+
+OptionalAmount
+clang::analyze_format_string::ParseNonPositionAmount(const char *&Beg,
+ const char *E,
+ unsigned &argIndex) {
+ if (*Beg == '*') {
+ ++Beg;
+ return OptionalAmount(OptionalAmount::Arg, argIndex++, Beg, 0, false);
+ }
+
+ return ParseAmount(Beg, E);
+}
+
+OptionalAmount
+clang::analyze_format_string::ParsePositionAmount(FormatStringHandler &H,
+ const char *Start,
+ const char *&Beg,
+ const char *E,
+ PositionContext p) {
+ if (*Beg == '*') {
+ const char *I = Beg + 1;
+ const OptionalAmount &Amt = ParseAmount(I, E);
+
+ if (Amt.getHowSpecified() == OptionalAmount::NotSpecified) {
+ H.HandleInvalidPosition(Beg, I - Beg, p);
+ return OptionalAmount(false);
+ }
+
+ if (I == E) {
+ // No more characters left?
+ H.HandleIncompleteSpecifier(Start, E - Start);
+ return OptionalAmount(false);
+ }
+
+ assert(Amt.getHowSpecified() == OptionalAmount::Constant);
+
+ if (*I == '$') {
+ // Handle positional arguments
+
+ // Special case: '*0$', since this is an easy mistake.
+ if (Amt.getConstantAmount() == 0) {
+ H.HandleZeroPosition(Beg, I - Beg + 1);
+ return OptionalAmount(false);
+ }
+
+ const char *Tmp = Beg;
+ Beg = ++I;
+
+ return OptionalAmount(OptionalAmount::Arg, Amt.getConstantAmount() - 1,
+ Tmp, 0, true);
+ }
+
+ H.HandleInvalidPosition(Beg, I - Beg, p);
+ return OptionalAmount(false);
+ }
+
+ return ParseAmount(Beg, E);
+}
+
+
+bool
+clang::analyze_format_string::ParseFieldWidth(FormatStringHandler &H,
+ FormatSpecifier &CS,
+ const char *Start,
+ const char *&Beg, const char *E,
+ unsigned *argIndex) {
+ // FIXME: Support negative field widths.
+ if (argIndex) {
+ CS.setFieldWidth(ParseNonPositionAmount(Beg, E, *argIndex));
+ }
+ else {
+ const OptionalAmount Amt =
+ ParsePositionAmount(H, Start, Beg, E,
+ analyze_format_string::FieldWidthPos);
+
+ if (Amt.isInvalid())
+ return true;
+ CS.setFieldWidth(Amt);
+ }
+ return false;
+}
+
+bool
+clang::analyze_format_string::ParseArgPosition(FormatStringHandler &H,
+ FormatSpecifier &FS,
+ const char *Start,
+ const char *&Beg,
+ const char *E) {
+ const char *I = Beg;
+
+ const OptionalAmount &Amt = ParseAmount(I, E);
+
+ if (I == E) {
+ // No more characters left?
+ H.HandleIncompleteSpecifier(Start, E - Start);
+ return true;
+ }
+
+ if (Amt.getHowSpecified() == OptionalAmount::Constant && *(I++) == '$') {
+ // Warn that positional arguments are non-standard.
+ H.HandlePosition(Start, I - Start);
+
+ // Special case: '%0$', since this is an easy mistake.
+ if (Amt.getConstantAmount() == 0) {
+ H.HandleZeroPosition(Start, I - Start);
+ return true;
+ }
+
+ FS.setArgIndex(Amt.getConstantAmount() - 1);
+ FS.setUsesPositionalArg();
+ // Update the caller's pointer if we decided to consume
+ // these characters.
+ Beg = I;
+ return false;
+ }
+
+ return false;
+}
+
+bool
+clang::analyze_format_string::ParseVectorModifier(FormatStringHandler &H,
+ FormatSpecifier &FS,
+ const char *&I,
+ const char *E,
+ const LangOptions &LO) {
+ if (!LO.OpenCL)
+ return false;
+
+ const char *Start = I;
+ if (*I == 'v') {
+ ++I;
+
+ if (I == E) {
+ H.HandleIncompleteSpecifier(Start, E - Start);
+ return true;
+ }
+
+ OptionalAmount NumElts = ParseAmount(I, E);
+ if (NumElts.getHowSpecified() != OptionalAmount::Constant) {
+ H.HandleIncompleteSpecifier(Start, E - Start);
+ return true;
+ }
+
+ FS.setVectorNumElts(NumElts);
+ }
+
+ return false;
+}
+
+bool
+clang::analyze_format_string::ParseLengthModifier(FormatSpecifier &FS,
+ const char *&I,
+ const char *E,
+ const LangOptions &LO,
+ bool IsScanf) {
+ LengthModifier::Kind lmKind = LengthModifier::None;
+ const char *lmPosition = I;
+ switch (*I) {
+ default:
+ return false;
+ case 'h':
+ ++I;
+ if (I != E && *I == 'h') {
+ ++I;
+ lmKind = LengthModifier::AsChar;
+ } else {
+ lmKind = LengthModifier::AsShort;
+ }
+ break;
+ case 'l':
+ ++I;
+ if (I != E && *I == 'l') {
+ ++I;
+ lmKind = LengthModifier::AsLongLong;
+ } else {
+ lmKind = LengthModifier::AsLong;
+ }
+ break;
+ case 'j': lmKind = LengthModifier::AsIntMax; ++I; break;
+ case 'z': lmKind = LengthModifier::AsSizeT; ++I; break;
+ case 't': lmKind = LengthModifier::AsPtrDiff; ++I; break;
+ case 'L': lmKind = LengthModifier::AsLongDouble; ++I; break;
+ case 'q': lmKind = LengthModifier::AsQuad; ++I; break;
+ case 'a':
+ if (IsScanf && !LO.C99 && !LO.CPlusPlus11) {
+ // For scanf in C90, look at the next character to see if this should
+ // be parsed as the GNU extension 'a' length modifier. If not, this
+ // will be parsed as a conversion specifier.
+ ++I;
+ if (I != E && (*I == 's' || *I == 'S' || *I == '[')) {
+ lmKind = LengthModifier::AsAllocate;
+ break;
+ }
+ --I;
+ }
+ return false;
+ case 'm':
+ if (IsScanf) {
+ lmKind = LengthModifier::AsMAllocate;
+ ++I;
+ break;
+ }
+ return false;
+ // printf: AsInt64, AsInt32, AsInt3264
+ // scanf: AsInt64
+ case 'I':
+ if (I + 1 != E && I + 2 != E) {
+ if (I[1] == '6' && I[2] == '4') {
+ I += 3;
+ lmKind = LengthModifier::AsInt64;
+ break;
+ }
+ if (IsScanf)
+ return false;
+
+ if (I[1] == '3' && I[2] == '2') {
+ I += 3;
+ lmKind = LengthModifier::AsInt32;
+ break;
+ }
+ }
+ ++I;
+ lmKind = LengthModifier::AsInt3264;
+ break;
+ case 'w':
+ lmKind = LengthModifier::AsWide; ++I; break;
+ }
+ LengthModifier lm(lmPosition, lmKind);
+ FS.setLengthModifier(lm);
+ return true;
+}
+
+bool clang::analyze_format_string::ParseUTF8InvalidSpecifier(
+ const char *SpecifierBegin, const char *FmtStrEnd, unsigned &Len) {
+ if (SpecifierBegin + 1 >= FmtStrEnd)
+ return false;
+
+ const llvm::UTF8 *SB =
+ reinterpret_cast<const llvm::UTF8 *>(SpecifierBegin + 1);
+ const llvm::UTF8 *SE = reinterpret_cast<const llvm::UTF8 *>(FmtStrEnd);
+ const char FirstByte = *SB;
+
+ // If the invalid specifier is a multibyte UTF-8 string, return the
+ // total length accordingly so that the conversion specifier can be
+ // properly updated to reflect a complete UTF-8 specifier.
+ unsigned NumBytes = llvm::getNumBytesForUTF8(FirstByte);
+ if (NumBytes == 1)
+ return false;
+ if (SB + NumBytes > SE)
+ return false;
+
+ Len = NumBytes + 1;
+ return true;
+}
+
+//===----------------------------------------------------------------------===//
+// Methods on ArgType.
+//===----------------------------------------------------------------------===//
+
+clang::analyze_format_string::ArgType::MatchKind
+ArgType::matchesType(ASTContext &C, QualType argTy) const {
+ if (Ptr) {
+ // It has to be a pointer.
+ const PointerType *PT = argTy->getAs<PointerType>();
+ if (!PT)
+ return NoMatch;
+
+ // We cannot write through a const qualified pointer.
+ if (PT->getPointeeType().isConstQualified())
+ return NoMatch;
+
+ argTy = PT->getPointeeType();
+ }
+
+ switch (K) {
+ case InvalidTy:
+ llvm_unreachable("ArgType must be valid");
+
+ case UnknownTy:
+ return Match;
+
+ case AnyCharTy: {
+ if (const EnumType *ETy = argTy->getAs<EnumType>()) {
+ // If the enum is incomplete we know nothing about the underlying type.
+ // Assume that it's 'int'.
+ if (!ETy->getDecl()->isComplete())
+ return NoMatch;
+ argTy = ETy->getDecl()->getIntegerType();
+ }
+
+ if (const BuiltinType *BT = argTy->getAs<BuiltinType>())
+ switch (BT->getKind()) {
+ default:
+ break;
+ case BuiltinType::Char_S:
+ case BuiltinType::SChar:
+ case BuiltinType::UChar:
+ case BuiltinType::Char_U:
+ return Match;
+ }
+ return NoMatch;
+ }
+
+ case SpecificTy: {
+ if (const EnumType *ETy = argTy->getAs<EnumType>()) {
+ // If the enum is incomplete we know nothing about the underlying type.
+ // Assume that it's 'int'.
+ if (!ETy->getDecl()->isComplete())
+ argTy = C.IntTy;
+ else
+ argTy = ETy->getDecl()->getIntegerType();
+ }
+ argTy = C.getCanonicalType(argTy).getUnqualifiedType();
+
+ if (T == argTy)
+ return Match;
+ // Check for "compatible types".
+ if (const BuiltinType *BT = argTy->getAs<BuiltinType>())
+ switch (BT->getKind()) {
+ default:
+ break;
+ case BuiltinType::Char_S:
+ case BuiltinType::SChar:
+ case BuiltinType::Char_U:
+ case BuiltinType::UChar:
+ return T == C.UnsignedCharTy || T == C.SignedCharTy ? Match
+ : NoMatch;
+ case BuiltinType::Short:
+ return T == C.UnsignedShortTy ? Match : NoMatch;
+ case BuiltinType::UShort:
+ return T == C.ShortTy ? Match : NoMatch;
+ case BuiltinType::Int:
+ return T == C.UnsignedIntTy ? Match : NoMatch;
+ case BuiltinType::UInt:
+ return T == C.IntTy ? Match : NoMatch;
+ case BuiltinType::Long:
+ return T == C.UnsignedLongTy ? Match : NoMatch;
+ case BuiltinType::ULong:
+ return T == C.LongTy ? Match : NoMatch;
+ case BuiltinType::LongLong:
+ return T == C.UnsignedLongLongTy ? Match : NoMatch;
+ case BuiltinType::ULongLong:
+ return T == C.LongLongTy ? Match : NoMatch;
+ }
+ return NoMatch;
+ }
+
+ case CStrTy: {
+ const PointerType *PT = argTy->getAs<PointerType>();
+ if (!PT)
+ return NoMatch;
+ QualType pointeeTy = PT->getPointeeType();
+ if (const BuiltinType *BT = pointeeTy->getAs<BuiltinType>())
+ switch (BT->getKind()) {
+ case BuiltinType::Void:
+ case BuiltinType::Char_U:
+ case BuiltinType::UChar:
+ case BuiltinType::Char_S:
+ case BuiltinType::SChar:
+ return Match;
+ default:
+ break;
+ }
+
+ return NoMatch;
+ }
+
+ case WCStrTy: {
+ const PointerType *PT = argTy->getAs<PointerType>();
+ if (!PT)
+ return NoMatch;
+ QualType pointeeTy =
+ C.getCanonicalType(PT->getPointeeType()).getUnqualifiedType();
+ return pointeeTy == C.getWideCharType() ? Match : NoMatch;
+ }
+
+ case WIntTy: {
+ QualType WInt = C.getCanonicalType(C.getWIntType()).getUnqualifiedType();
+
+ if (C.getCanonicalType(argTy).getUnqualifiedType() == WInt)
+ return Match;
+
+ QualType PromoArg = argTy->isPromotableIntegerType()
+ ? C.getPromotedIntegerType(argTy)
+ : argTy;
+ PromoArg = C.getCanonicalType(PromoArg).getUnqualifiedType();
+
+ // If the promoted argument is the corresponding signed type of the
+ // wint_t type, then it should match.
+ if (PromoArg->hasSignedIntegerRepresentation() &&
+ C.getCorrespondingUnsignedType(PromoArg) == WInt)
+ return Match;
+
+ return WInt == PromoArg ? Match : NoMatch;
+ }
+
+ case CPointerTy:
+ if (argTy->isVoidPointerType()) {
+ return Match;
+ } if (argTy->isPointerType() || argTy->isObjCObjectPointerType() ||
+ argTy->isBlockPointerType() || argTy->isNullPtrType()) {
+ return NoMatchPedantic;
+ } else {
+ return NoMatch;
+ }
+
+ case ObjCPointerTy: {
+ if (argTy->getAs<ObjCObjectPointerType>() ||
+ argTy->getAs<BlockPointerType>())
+ return Match;
+
+ // Handle implicit toll-free bridging.
+ if (const PointerType *PT = argTy->getAs<PointerType>()) {
+ // Things such as CFTypeRef are really just opaque pointers
+ // to C structs representing CF types that can often be bridged
+ // to Objective-C objects. Since the compiler doesn't know which
+ // structs can be toll-free bridged, we just accept them all.
+ QualType pointee = PT->getPointeeType();
+ if (pointee->getAsStructureType() || pointee->isVoidType())
+ return Match;
+ }
+ return NoMatch;
+ }
+ }
+
+ llvm_unreachable("Invalid ArgType Kind!");
+}
+
+ArgType ArgType::makeVectorType(ASTContext &C, unsigned NumElts) const {
+ if (K != SpecificTy) // Won't be a valid vector element type.
+ return ArgType::Invalid();
+
+ QualType Vec = C.getExtVectorType(T, NumElts);
+ return ArgType(Vec, Name);
+}
+
+QualType ArgType::getRepresentativeType(ASTContext &C) const {
+ QualType Res;
+ switch (K) {
+ case InvalidTy:
+ llvm_unreachable("No representative type for Invalid ArgType");
+ case UnknownTy:
+ llvm_unreachable("No representative type for Unknown ArgType");
+ case AnyCharTy:
+ Res = C.CharTy;
+ break;
+ case SpecificTy:
+ Res = T;
+ break;
+ case CStrTy:
+ Res = C.getPointerType(C.CharTy);
+ break;
+ case WCStrTy:
+ Res = C.getPointerType(C.getWideCharType());
+ break;
+ case ObjCPointerTy:
+ Res = C.ObjCBuiltinIdTy;
+ break;
+ case CPointerTy:
+ Res = C.VoidPtrTy;
+ break;
+ case WIntTy: {
+ Res = C.getWIntType();
+ break;
+ }
+ }
+
+ if (Ptr)
+ Res = C.getPointerType(Res);
+ return Res;
+}
+
+std::string ArgType::getRepresentativeTypeName(ASTContext &C) const {
+ std::string S = getRepresentativeType(C).getAsString();
+
+ std::string Alias;
+ if (Name) {
+ // Use a specific name for this type, e.g. "size_t".
+ Alias = Name;
+ if (Ptr) {
+ // If ArgType is actually a pointer to T, append an asterisk.
+ Alias += (Alias[Alias.size()-1] == '*') ? "*" : " *";
+ }
+ // If Alias is the same as the underlying type, e.g. wchar_t, then drop it.
+ if (S == Alias)
+ Alias.clear();
+ }
+
+ if (!Alias.empty())
+ return std::string("'") + Alias + "' (aka '" + S + "')";
+ return std::string("'") + S + "'";
+}
+
+
+//===----------------------------------------------------------------------===//
+// Methods on OptionalAmount.
+//===----------------------------------------------------------------------===//
+
+ArgType
+analyze_format_string::OptionalAmount::getArgType(ASTContext &Ctx) const {
+ return Ctx.IntTy;
+}
+
+//===----------------------------------------------------------------------===//
+// Methods on LengthModifier.
+//===----------------------------------------------------------------------===//
+
+const char *
+analyze_format_string::LengthModifier::toString() const {
+ switch (kind) {
+ case AsChar:
+ return "hh";
+ case AsShort:
+ return "h";
+ case AsLong: // or AsWideChar
+ return "l";
+ case AsLongLong:
+ return "ll";
+ case AsQuad:
+ return "q";
+ case AsIntMax:
+ return "j";
+ case AsSizeT:
+ return "z";
+ case AsPtrDiff:
+ return "t";
+ case AsInt32:
+ return "I32";
+ case AsInt3264:
+ return "I";
+ case AsInt64:
+ return "I64";
+ case AsLongDouble:
+ return "L";
+ case AsAllocate:
+ return "a";
+ case AsMAllocate:
+ return "m";
+ case AsWide:
+ return "w";
+ case None:
+ return "";
+ }
+ return nullptr;
+}
+
+//===----------------------------------------------------------------------===//
+// Methods on ConversionSpecifier.
+//===----------------------------------------------------------------------===//
+
+const char *ConversionSpecifier::toString() const {
+ switch (kind) {
+ case dArg: return "d";
+ case DArg: return "D";
+ case iArg: return "i";
+ case oArg: return "o";
+ case OArg: return "O";
+ case uArg: return "u";
+ case UArg: return "U";
+ case xArg: return "x";
+ case XArg: return "X";
+ case fArg: return "f";
+ case FArg: return "F";
+ case eArg: return "e";
+ case EArg: return "E";
+ case gArg: return "g";
+ case GArg: return "G";
+ case aArg: return "a";
+ case AArg: return "A";
+ case cArg: return "c";
+ case sArg: return "s";
+ case pArg: return "p";
+ case PArg:
+ return "P";
+ case nArg: return "n";
+ case PercentArg: return "%";
+ case ScanListArg: return "[";
+ case InvalidSpecifier: return nullptr;
+
+ // POSIX unicode extensions.
+ case CArg: return "C";
+ case SArg: return "S";
+
+ // Objective-C specific specifiers.
+ case ObjCObjArg: return "@";
+
+ // FreeBSD kernel specific specifiers.
+ case FreeBSDbArg: return "b";
+ case FreeBSDDArg: return "D";
+ case FreeBSDrArg: return "r";
+ case FreeBSDyArg: return "y";
+
+ // GlibC specific specifiers.
+ case PrintErrno: return "m";
+
+ // MS specific specifiers.
+ case ZArg: return "Z";
+ }
+ return nullptr;
+}
+
+Optional<ConversionSpecifier>
+ConversionSpecifier::getStandardSpecifier() const {
+ ConversionSpecifier::Kind NewKind;
+
+ switch (getKind()) {
+ default:
+ return None;
+ case DArg:
+ NewKind = dArg;
+ break;
+ case UArg:
+ NewKind = uArg;
+ break;
+ case OArg:
+ NewKind = oArg;
+ break;
+ }
+
+ ConversionSpecifier FixedCS(*this);
+ FixedCS.setKind(NewKind);
+ return FixedCS;
+}
+
+//===----------------------------------------------------------------------===//
+// Methods on OptionalAmount.
+//===----------------------------------------------------------------------===//
+
+void OptionalAmount::toString(raw_ostream &os) const {
+ switch (hs) {
+ case Invalid:
+ case NotSpecified:
+ return;
+ case Arg:
+ if (UsesDotPrefix)
+ os << ".";
+ if (usesPositionalArg())
+ os << "*" << getPositionalArgIndex() << "$";
+ else
+ os << "*";
+ break;
+ case Constant:
+ if (UsesDotPrefix)
+ os << ".";
+ os << amt;
+ break;
+ }
+}
+
+bool FormatSpecifier::hasValidLengthModifier(const TargetInfo &Target) const {
+ switch (LM.getKind()) {
+ case LengthModifier::None:
+ return true;
+
+ // Handle most integer flags
+ case LengthModifier::AsShort:
+ if (Target.getTriple().isOSMSVCRT()) {
+ switch (CS.getKind()) {
+ case ConversionSpecifier::cArg:
+ case ConversionSpecifier::CArg:
+ case ConversionSpecifier::sArg:
+ case ConversionSpecifier::SArg:
+ case ConversionSpecifier::ZArg:
+ return true;
+ default:
+ break;
+ }
+ }
+ LLVM_FALLTHROUGH;
+ case LengthModifier::AsChar:
+ case LengthModifier::AsLongLong:
+ case LengthModifier::AsQuad:
+ case LengthModifier::AsIntMax:
+ case LengthModifier::AsSizeT:
+ case LengthModifier::AsPtrDiff:
+ switch (CS.getKind()) {
+ case ConversionSpecifier::dArg:
+ case ConversionSpecifier::DArg:
+ case ConversionSpecifier::iArg:
+ case ConversionSpecifier::oArg:
+ case ConversionSpecifier::OArg:
+ case ConversionSpecifier::uArg:
+ case ConversionSpecifier::UArg:
+ case ConversionSpecifier::xArg:
+ case ConversionSpecifier::XArg:
+ case ConversionSpecifier::nArg:
+ return true;
+ case ConversionSpecifier::FreeBSDrArg:
+ case ConversionSpecifier::FreeBSDyArg:
+ return Target.getTriple().isOSFreeBSD() || Target.getTriple().isPS4();
+ default:
+ return false;
+ }
+
+ // Handle 'l' flag
+ case LengthModifier::AsLong: // or AsWideChar
+ switch (CS.getKind()) {
+ case ConversionSpecifier::dArg:
+ case ConversionSpecifier::DArg:
+ case ConversionSpecifier::iArg:
+ case ConversionSpecifier::oArg:
+ case ConversionSpecifier::OArg:
+ case ConversionSpecifier::uArg:
+ case ConversionSpecifier::UArg:
+ case ConversionSpecifier::xArg:
+ case ConversionSpecifier::XArg:
+ case ConversionSpecifier::aArg:
+ case ConversionSpecifier::AArg:
+ case ConversionSpecifier::fArg:
+ case ConversionSpecifier::FArg:
+ case ConversionSpecifier::eArg:
+ case ConversionSpecifier::EArg:
+ case ConversionSpecifier::gArg:
+ case ConversionSpecifier::GArg:
+ case ConversionSpecifier::nArg:
+ case ConversionSpecifier::cArg:
+ case ConversionSpecifier::sArg:
+ case ConversionSpecifier::ScanListArg:
+ case ConversionSpecifier::ZArg:
+ return true;
+ case ConversionSpecifier::FreeBSDrArg:
+ case ConversionSpecifier::FreeBSDyArg:
+ return Target.getTriple().isOSFreeBSD() || Target.getTriple().isPS4();
+ default:
+ return false;
+ }
+
+ case LengthModifier::AsLongDouble:
+ switch (CS.getKind()) {
+ case ConversionSpecifier::aArg:
+ case ConversionSpecifier::AArg:
+ case ConversionSpecifier::fArg:
+ case ConversionSpecifier::FArg:
+ case ConversionSpecifier::eArg:
+ case ConversionSpecifier::EArg:
+ case ConversionSpecifier::gArg:
+ case ConversionSpecifier::GArg:
+ return true;
+ // GNU libc extension.
+ case ConversionSpecifier::dArg:
+ case ConversionSpecifier::iArg:
+ case ConversionSpecifier::oArg:
+ case ConversionSpecifier::uArg:
+ case ConversionSpecifier::xArg:
+ case ConversionSpecifier::XArg:
+ return !Target.getTriple().isOSDarwin() &&
+ !Target.getTriple().isOSWindows();
+ default:
+ return false;
+ }
+
+ case LengthModifier::AsAllocate:
+ switch (CS.getKind()) {
+ case ConversionSpecifier::sArg:
+ case ConversionSpecifier::SArg:
+ case ConversionSpecifier::ScanListArg:
+ return true;
+ default:
+ return false;
+ }
+
+ case LengthModifier::AsMAllocate:
+ switch (CS.getKind()) {
+ case ConversionSpecifier::cArg:
+ case ConversionSpecifier::CArg:
+ case ConversionSpecifier::sArg:
+ case ConversionSpecifier::SArg:
+ case ConversionSpecifier::ScanListArg:
+ return true;
+ default:
+ return false;
+ }
+ case LengthModifier::AsInt32:
+ case LengthModifier::AsInt3264:
+ case LengthModifier::AsInt64:
+ switch (CS.getKind()) {
+ case ConversionSpecifier::dArg:
+ case ConversionSpecifier::iArg:
+ case ConversionSpecifier::oArg:
+ case ConversionSpecifier::uArg:
+ case ConversionSpecifier::xArg:
+ case ConversionSpecifier::XArg:
+ return Target.getTriple().isOSMSVCRT();
+ default:
+ return false;
+ }
+ case LengthModifier::AsWide:
+ switch (CS.getKind()) {
+ case ConversionSpecifier::cArg:
+ case ConversionSpecifier::CArg:
+ case ConversionSpecifier::sArg:
+ case ConversionSpecifier::SArg:
+ case ConversionSpecifier::ZArg:
+ return Target.getTriple().isOSMSVCRT();
+ default:
+ return false;
+ }
+ }
+ llvm_unreachable("Invalid LengthModifier Kind!");
+}
+
+bool FormatSpecifier::hasStandardLengthModifier() const {
+ switch (LM.getKind()) {
+ case LengthModifier::None:
+ case LengthModifier::AsChar:
+ case LengthModifier::AsShort:
+ case LengthModifier::AsLong:
+ case LengthModifier::AsLongLong:
+ case LengthModifier::AsIntMax:
+ case LengthModifier::AsSizeT:
+ case LengthModifier::AsPtrDiff:
+ case LengthModifier::AsLongDouble:
+ return true;
+ case LengthModifier::AsAllocate:
+ case LengthModifier::AsMAllocate:
+ case LengthModifier::AsQuad:
+ case LengthModifier::AsInt32:
+ case LengthModifier::AsInt3264:
+ case LengthModifier::AsInt64:
+ case LengthModifier::AsWide:
+ return false;
+ }
+ llvm_unreachable("Invalid LengthModifier Kind!");
+}
+
+bool FormatSpecifier::hasStandardConversionSpecifier(
+ const LangOptions &LangOpt) const {
+ switch (CS.getKind()) {
+ case ConversionSpecifier::cArg:
+ case ConversionSpecifier::dArg:
+ case ConversionSpecifier::iArg:
+ case ConversionSpecifier::oArg:
+ case ConversionSpecifier::uArg:
+ case ConversionSpecifier::xArg:
+ case ConversionSpecifier::XArg:
+ case ConversionSpecifier::fArg:
+ case ConversionSpecifier::FArg:
+ case ConversionSpecifier::eArg:
+ case ConversionSpecifier::EArg:
+ case ConversionSpecifier::gArg:
+ case ConversionSpecifier::GArg:
+ case ConversionSpecifier::aArg:
+ case ConversionSpecifier::AArg:
+ case ConversionSpecifier::sArg:
+ case ConversionSpecifier::pArg:
+ case ConversionSpecifier::nArg:
+ case ConversionSpecifier::ObjCObjArg:
+ case ConversionSpecifier::ScanListArg:
+ case ConversionSpecifier::PercentArg:
+ case ConversionSpecifier::PArg:
+ return true;
+ case ConversionSpecifier::CArg:
+ case ConversionSpecifier::SArg:
+ return LangOpt.ObjC;
+ case ConversionSpecifier::InvalidSpecifier:
+ case ConversionSpecifier::FreeBSDbArg:
+ case ConversionSpecifier::FreeBSDDArg:
+ case ConversionSpecifier::FreeBSDrArg:
+ case ConversionSpecifier::FreeBSDyArg:
+ case ConversionSpecifier::PrintErrno:
+ case ConversionSpecifier::DArg:
+ case ConversionSpecifier::OArg:
+ case ConversionSpecifier::UArg:
+ case ConversionSpecifier::ZArg:
+ return false;
+ }
+ llvm_unreachable("Invalid ConversionSpecifier Kind!");
+}
+
+bool FormatSpecifier::hasStandardLengthConversionCombination() const {
+ if (LM.getKind() == LengthModifier::AsLongDouble) {
+ switch(CS.getKind()) {
+ case ConversionSpecifier::dArg:
+ case ConversionSpecifier::iArg:
+ case ConversionSpecifier::oArg:
+ case ConversionSpecifier::uArg:
+ case ConversionSpecifier::xArg:
+ case ConversionSpecifier::XArg:
+ return false;
+ default:
+ return true;
+ }
+ }
+ return true;
+}
+
+Optional<LengthModifier> FormatSpecifier::getCorrectedLengthModifier() const {
+ if (CS.isAnyIntArg() || CS.getKind() == ConversionSpecifier::nArg) {
+ if (LM.getKind() == LengthModifier::AsLongDouble ||
+ LM.getKind() == LengthModifier::AsQuad) {
+ LengthModifier FixedLM(LM);
+ FixedLM.setKind(LengthModifier::AsLongLong);
+ return FixedLM;
+ }
+ }
+
+ return None;
+}
+
+bool FormatSpecifier::namedTypeToLengthModifier(QualType QT,
+ LengthModifier &LM) {
+ assert(isa<TypedefType>(QT) && "Expected a TypedefType");
+ const TypedefNameDecl *Typedef = cast<TypedefType>(QT)->getDecl();
+
+ for (;;) {
+ const IdentifierInfo *Identifier = Typedef->getIdentifier();
+ if (Identifier->getName() == "size_t") {
+ LM.setKind(LengthModifier::AsSizeT);
+ return true;
+ } else if (Identifier->getName() == "ssize_t") {
+ // Not C99, but common in Unix.
+ LM.setKind(LengthModifier::AsSizeT);
+ return true;
+ } else if (Identifier->getName() == "intmax_t") {
+ LM.setKind(LengthModifier::AsIntMax);
+ return true;
+ } else if (Identifier->getName() == "uintmax_t") {
+ LM.setKind(LengthModifier::AsIntMax);
+ return true;
+ } else if (Identifier->getName() == "ptrdiff_t") {
+ LM.setKind(LengthModifier::AsPtrDiff);
+ return true;
+ }
+
+ QualType T = Typedef->getUnderlyingType();
+ if (!isa<TypedefType>(T))
+ break;
+
+ Typedef = cast<TypedefType>(T)->getDecl();
+ }
+ return false;
+}
generated by cgit v1.2.3 (git 2.25.1) at 2024-04-25 21:03:42 +0000