Function ConcatenateBuffers

cpp/src/arrow/buffer.cc:203–219

}

Result<std::shared_ptr<Buffer>> ConcatenateBuffers(
    const std::vector<std::shared_ptr<Buffer>>& buffers, MemoryPool* pool) {
  int64_t out_length = 0;
  for (const auto& buffer : buffers) {
    out_length += buffer->size();
  }
  ARROW_ASSIGN_OR_RAISE(auto out, AllocateBuffer(out_length, pool));
  auto out_data = out->mutable_data();
  for (const auto& buffer : buffers) {
    // Passing nullptr to std::memcpy is undefined behavior, so skip empty buffers
    if (buffer->size() != 0) {
      std::memcpy(out_data, buffer->data(), buffer->size());
      out_data += buffer->size();
    }
  }
  return out;
}

}  // namespace arrow