Function FlatBuffersVectorSize

cpp/src/arrow/ipc/metadata_internal.h:113–115

template <typename T>
inline uint32_t FlatBuffersVectorSize(const flatbuffers::Vector<T>* vec) {
  return (vec == NULLPTR) ? 0 : vec->size();
}

inline std::string StringFromFlatbuffers(const flatbuffers::String* s) {
  return (s == NULLPTR) ? "" : s->str();