Beispiel #1
0
Error llvm::pdb::readSparseBitVector(BinaryStreamReader &Stream,
                                     SparseBitVector<> &V) {
  uint32_t NumWords;
  if (auto EC = Stream.readInteger(NumWords))
    return joinErrors(
        std::move(EC),
        make_error<RawError>(raw_error_code::corrupt_file,
                             "Expected hash table number of words"));

  for (uint32_t I = 0; I != NumWords; ++I) {
    uint32_t Word;
    if (auto EC = Stream.readInteger(Word))
      return joinErrors(std::move(EC),
                        make_error<RawError>(raw_error_code::corrupt_file,
                                             "Expected hash table word"));
    for (unsigned Idx = 0; Idx < 32; ++Idx)
      if (Word & (1U << Idx))
        V.set((I * 32) + Idx);
  }
  return Error::success();
}
Error NamedStreamMap::load(BinaryStreamReader &Stream) {
  Mapping.clear();
  FinalizedHashTable.clear();
  FinalizedInfo.reset();

  uint32_t StringBufferSize;
  if (auto EC = Stream.readInteger(StringBufferSize))
    return joinErrors(std::move(EC),
                      make_error<RawError>(raw_error_code::corrupt_file,
                                           "Expected string buffer size"));

  BinaryStreamRef StringsBuffer;
  if (auto EC = Stream.readStreamRef(StringsBuffer, StringBufferSize))
    return EC;

  HashTable OffsetIndexMap;
  if (auto EC = OffsetIndexMap.load(Stream))
    return EC;

  uint32_t NameOffset;
  uint32_t NameIndex;
  for (const auto &Entry : OffsetIndexMap) {
    std::tie(NameOffset, NameIndex) = Entry;

    // Compute the offset of the start of the string relative to the stream.
    BinaryStreamReader NameReader(StringsBuffer);
    NameReader.setOffset(NameOffset);
    // Pump out our c-string from the stream.
    StringRef Str;
    if (auto EC = NameReader.readCString(Str))
      return joinErrors(std::move(EC),
                        make_error<RawError>(raw_error_code::corrupt_file,
                                             "Expected name map name"));

    // Add this to a string-map from name to stream number.
    Mapping.insert({Str, NameIndex});
  }

  return Error::success();
}