Function readStringView

bolt/exec/tests/utils/RowBasedSerde.cpp:597–608

Returns a view over a serialized string with the string as a contiguous array of bytes. This may use 'storage' for a temporary copy.

// contiguous array of bytes. This may use 'storage' for a temporary
// copy.
StringView readStringView(ByteInputStream& stream, std::string& storage) {
  int32_t size = stream.read<int32_t>();
  auto view = stream.nextView(size);
  if (view.size() == size) {
    // The string is all in one piece, no copy.
    return StringView(view.data(), view.size());
  }
  storage.resize(size);
  memcpy(storage.data(), view.data(), view.size());
  stream.readBytes(storage.data() + view.size(), size - view.size());
  return StringView(storage);
}

// Comparison of two serializations.
std::optional<int32_t> compareSwitch(