Method GetBuffer

cpp/src/arrow/ipc/reader.cc:251–265

  }

  Status GetBuffer(int buffer_index, std::shared_ptr<Buffer>* out) {
    auto* buffers = metadata_->buffers();
    CHECK_FLATBUFFERS_NOT_NULL(buffers, "RecordBatch.buffers");
    if (buffer_index >= static_cast<int>(buffers->size())) {
      return Status::IOError("buffer_index out of range.");
    }
    const flatbuf::Buffer* buffer = buffers->Get(buffer_index);
    if (buffer->length() == 0) {
      // Should never return a null buffer here.
      // (zero-sized buffer allocations are cheap)
      return AllocateBuffer(0).Value(out);
    } else {
      return ReadBuffer(buffer->offset(), buffer->length(), out);
    }
  }

  Result<int64_t> GetVariadicCount(int i) {
    auto* variadic_counts = metadata_->variadicBufferCounts();