char *sr_period_string(uint64_t frequency);
char **sr_parse_triggerstring(struct sr_device *device,
const char *triggerstring);
-uint64_t sr_parse_sizestring(const char *sizestring);
+int sr_parse_sizestring(const char *sizestring, uint64_t *size);
uint64_t sr_parse_timestring(const char *timestring);
gboolean sr_parse_boolstring(const char *boolstring);