Hi all, I am writing a String Reverse kernel [1]. I am extending the arrow::compute::internal::StringTransform class [2] for my impl. StringTransform is expecting the Derived class to implement the following Tranfsform method.
bool Transform(const uint8_t* input, offset_type input_string_ncodeunits, uint8_t* output, offset_type* output_written) I believe the output_written pointer expects the Transform method to indicate StringTransform about "the number of bytes written to the output buffer". But in the reverse kernel, this value is predefined (*output_written = input_string_ncodeunits). Would it be useful to specialize StringTransform to handle such cases where input size == output size? Best [1] https://issues.apache.org/jira/browse/ARROW-12713 [2] https://github.com/apache/arrow/blob/325eb073e0fb6971f3dd027299d37850377b39ea/cpp/src/arrow/compute/kernels/scalar_string.cc#L137 -- Niranda Perera https://niranda.dev/ @n1r44 <https://twitter.com/N1R44>
