static ASTReader *createASTReader(CompilerInstance &CI,
StringRef pchFile,
SmallVector<llvm::MemoryBuffer *, 4> &memBufs,
SmallVector<std::string, 4> &bufNames,
ASTDeserializationListener *deserialListener = 0) {
Preprocessor &PP = CI.getPreprocessor();
OwningPtr<ASTReader> Reader;
Reader.reset(new ASTReader(PP, CI.getASTContext(), /*isysroot=*/"",
/*DisableValidation=*/true));
for (unsigned ti = 0; ti < bufNames.size(); ++ti) {
StringRef sr(bufNames[ti]);
Reader->addInMemoryBuffer(sr, memBufs[ti]);
}
Reader->setDeserializationListener(deserialListener);
switch (Reader->ReadAST(pchFile, serialization::MK_PCH,
ASTReader::ARR_None)) {
case ASTReader::Success:
// Set the predefines buffer as suggested by the PCH reader.
PP.setPredefines(Reader->getSuggestedPredefines());
return Reader.take();
case ASTReader::Failure:
case ASTReader::OutOfDate:
case ASTReader::VersionMismatch:
case ASTReader::ConfigurationMismatch:
case ASTReader::HadErrors:
break;
}
return 0;
}
ExternalASTSource *
CompilerInstance::createPCHExternalASTSource(StringRef Path,
const std::string &Sysroot,
bool DisablePCHValidation,
bool AllowPCHWithCompilerErrors,
Preprocessor &PP,
ASTContext &Context,
void *DeserializationListener,
bool Preamble) {
OwningPtr<ASTReader> Reader;
Reader.reset(new ASTReader(PP, Context,
Sysroot.empty() ? "" : Sysroot.c_str(),
DisablePCHValidation,
AllowPCHWithCompilerErrors));
Reader->setDeserializationListener(
static_cast<ASTDeserializationListener *>(DeserializationListener));
switch (Reader->ReadAST(Path,
Preamble ? serialization::MK_Preamble
: serialization::MK_PCH,
SourceLocation(),
ASTReader::ARR_None)) {
case ASTReader::Success:
// Set the predefines buffer as suggested by the PCH reader. Typically, the
// predefines buffer will be empty.
PP.setPredefines(Reader->getSuggestedPredefines());
return Reader.take();
case ASTReader::Failure:
// Unrecoverable failure: don't even try to process the input file.
break;
case ASTReader::OutOfDate:
case ASTReader::VersionMismatch:
case ASTReader::ConfigurationMismatch:
case ASTReader::HadErrors:
// No suitable PCH file could be found. Return an error.
break;
}
return 0;
}