SR_API int sr_analog_to_float(const struct sr_datafeed_analog *analog,
float *buf);
+SR_API const char *sr_analog_si_prefix(float *value, int *digits);
SR_API int sr_analog_unit_to_string(const struct sr_datafeed_analog *analog,
char **result);
SR_API void sr_rational_set(struct sr_rational *r, int64_t p, uint64_t q);