Function StaticCastBuffer

python/pyarrow/src/arrow/python/numpy_to_arrow.cc:368–379

template <typename FromType, typename ToType>
Status StaticCastBuffer(const Buffer& input, const int64_t length, MemoryPool* pool,
                        std::shared_ptr<Buffer>* out) {
  ARROW_ASSIGN_OR_RAISE(auto result, AllocateBuffer(sizeof(ToType) * length, pool));

  auto in_values = reinterpret_cast<const FromType*>(input.data());
  auto out_values = reinterpret_cast<ToType*>(result->mutable_data());
  for (int64_t i = 0; i < length; ++i) {
    *out_values++ = static_cast<ToType>(*in_values++);
  }
  *out = std::move(result);
  return Status::OK();
}

template <typename T>
void CopyStridedBytewise(int8_t* input_data, int64_t length, int64_t stride,