Function decompose_nfc

test-app/runtime/src/main/cpp/ada/ada.cpp:7880–7891

}

void decompose_nfc(std::u32string& input) {
  /**
   * Decompose the domain_name string to Unicode Normalization Form C.
   * @see https://www.unicode.org/reports/tr46/#ProcessingStepDecompose
   */
  auto [decomposition_needed, additional_elements] =
      compute_decomposition_length(input);
  if (decomposition_needed) {
    decompose(input, additional_elements);
  }
  sort_marks(input);
}

void compose(std::u32string& input) {
  /**