Method correctErrors

deps/zxing/core/src/zxing/pdf417/decoder/3Decoder.cpp:101–118

* Correct errors whenever it is possible using Reed-Solomom algorithm * * @param codewords, erasures, numECCodewords * @return 0. * @throws FormatException */

 * @throws FormatException
 */
void Decoder::correctErrors(ArrayRef<int> codewords,
                            ArrayRef<int> erasures, int numECCodewords) {
  if (erasures->size() > numECCodewords / 2 + MAX_ERRORS ||
      numECCodewords < 0 || numECCodewords > MAX_EC_CODEWORDS) {
    throw FormatException("PDF:Decoder:correctErrors: Too many errors or EC Codewords corrupted");
  }

  Ref<ErrorCorrection> errorCorrection(new ErrorCorrection);
  errorCorrection->decode(codewords, numECCodewords, erasures);

  // 2012-06-27 HFN if, despite of error correction, there are still codewords with invalid
  // value, throw an exception here:
  for (int i = 0; i < codewords->size(); i++) {
    if (codewords[i]<0) {
      throw FormatException("PDF:Decoder:correctErrors: Error correction did not succeed!");
    }
  }
}