Method AppendArraySlice

cpp/src/arrow/array/builder_binary.h:286–304

  }

  Status AppendArraySlice(const ArraySpan& array, int64_t offset,
                          int64_t length) override {
    auto bitmap = array.GetValues<uint8_t>(0, 0);
    auto offsets = array.GetValues<offset_type>(1);
    auto data = array.GetValues<uint8_t>(2, 0);
    auto total_length = offsets[offset + length] - offsets[offset];
    ARROW_RETURN_NOT_OK(Reserve(length));
    ARROW_RETURN_NOT_OK(ReserveData(total_length));
    for (int64_t i = 0; i < length; i++) {
      if (!bitmap || bit_util::GetBit(bitmap, array.offset + offset + i)) {
        const offset_type start = offsets[offset + i];
        const offset_type end = offsets[offset + i + 1];
        UnsafeAppend(data + start, end - start);
      } else {
        UnsafeAppendNull();
      }
    }
    return Status::OK();
  }

  void Reset() override {
    ArrayBuilder::Reset();