- memset(&ao_config.callsign, '\0', sizeof (ao_config.callsign));
- memcpy(&ao_config.callsign, AO_CONFIG_DEFAULT_CALLSIGN,
+ ao_xmemset(&ao_config.callsign, '\0', sizeof (ao_config.callsign));
+ ao_xmemcpy(&ao_config.callsign, AO_CONFIG_DEFAULT_CALLSIGN,