Function DecodeData

source/src/cip/cipcommon.c:616–690

}

int DecodeData(const EipUint8 cip_data_type,
               void *const cip_data,
               const EipUint8 **const cip_message) {
  int number_of_decoded_bytes = -1;

  switch (cip_data_type)
  /* check the data type of attribute */
  {
    case (kCipBool):
    case (kCipSint):
    case (kCipUsint):
    case (kCipByte):
      *(EipUint8 *) (cip_data) = **cip_message;
      ++(*cip_message);
      number_of_decoded_bytes = 1;
      break;

    case (kCipInt):
    case (kCipUint):
    case (kCipWord):
      (*(EipUint16 *) (cip_data) ) = GetIntFromMessage(cip_message);
      number_of_decoded_bytes = 2;
      break;

    case (kCipDint):
    case (kCipUdint):
    case (kCipDword):
    case (kCipReal):
      (*(EipUint32 *) (cip_data) ) = GetDintFromMessage(cip_message);
      number_of_decoded_bytes = 4;
      break;

#ifdef OPENER_SUPPORT_64BIT_DATATYPES
    case (kCipLint):
    case (kCipUlint):
    case (kCipLword): {
      (*(EipUint64 *) (cip_data) ) = GetLintFromMessage(cip_message);
      number_of_decoded_bytes = 8;
    }
    break;
#endif

    case (kCipString): {
      CipString *string = (CipString *) cip_data;
      string->length = GetIntFromMessage(cip_message);
      memcpy(string->string, *cip_message, string->length);
      *cip_message += string->length;

      number_of_decoded_bytes = string->length + 2;           /* we have a two byte length field */
      if (number_of_decoded_bytes & 0x01) {
        /* we have an odd byte count */
        ++(*cip_message);
        number_of_decoded_bytes++;
      }
    }
    break;
    case (kCipShortString): {
      CipShortString *short_string = (CipShortString *) cip_data;