struct unit_mq_string {
uint64_t value;
- char *str;
+ const char *str;
};
/* Please use the same order as in enum sr_unit (libsigrok.h). */
{ SR_MQFLAG_AVG, " AVG" },
{ SR_MQFLAG_REFERENCE, " REF" },
{ SR_MQFLAG_UNSTABLE, " UNSTABLE" },
+ { SR_MQFLAG_FOUR_WIRE, " 4-WIRE" },
ALL_ZERO
};
bigendian = FALSE;
#endif
if (!analog->encoding->is_float) {
- /* TODO */
- sr_err("Only floating-point encoding supported so far.");
- return SR_ERR;
+ float offset = analog->encoding->offset.p / (float)analog->encoding->offset.q;
+ float scale = analog->encoding->scale.p / (float)analog->encoding->scale.q;
+ gboolean is_signed = analog->encoding->is_signed;
+ gboolean is_bigendian = analog->encoding->is_bigendian;
+ int8_t *data8 = (int8_t *)(analog->data);
+ int16_t *data16 = (int16_t *)(analog->data);
+ int32_t *data32 = (int32_t *)(analog->data);
+
+ switch (analog->encoding->unitsize) {
+ case 1:
+ if (is_signed) {
+ for (unsigned int i = 0; i < count; i++) {
+ outbuf[i] = scale * data8[i];
+ outbuf[i] += offset;
+ }
+ } else {
+ for (unsigned int i = 0; i < count; i++) {
+ outbuf[i] = scale * R8(data8 + i);
+ outbuf[i] += offset;
+ }
+ }
+ break;
+ case 2:
+ if (is_signed && is_bigendian) {
+ for (unsigned int i = 0; i < count; i++) {
+ outbuf[i] = scale * RB16S(&data16[i]);
+ outbuf[i] += offset;
+ }
+ } else if (is_bigendian) {
+ for (unsigned int i = 0; i < count; i++) {
+ outbuf[i] = scale * RB16(&data16[i]);
+ outbuf[i] += offset;
+ }
+ } else if (is_signed) {
+ for (unsigned int i = 0; i < count; i++) {
+ outbuf[i] = scale * RL16S(&data16[i]);
+ outbuf[i] += offset;
+ }
+ } else {
+ for (unsigned int i = 0; i < count; i++) {
+ outbuf[i] = scale * RL16(&data16[i]);
+ outbuf[i] += offset;
+ }
+ }
+ break;
+ case 4:
+ if (is_signed && is_bigendian) {
+ for (unsigned int i = 0; i < count; i++) {
+ outbuf[i] = scale * RB32S(&data32[i]);
+ outbuf[i] += offset;
+ }
+ } else if (is_bigendian) {
+ for (unsigned int i = 0; i < count; i++) {
+ outbuf[i] = scale * RB32(&data32[i]);
+ outbuf[i] += offset;
+ }
+ } else if (is_signed) {
+ for (unsigned int i = 0; i < count; i++) {
+ outbuf[i] = scale * RL32S(&data32[i]);
+ outbuf[i] += offset;
+ }
+ } else {
+ for (unsigned int i = 0; i < count; i++) {
+ outbuf[i] = scale * RL32(&data32[i]);
+ outbuf[i] += offset;
+ }
+ }
+ break;
+ default:
+ sr_err("Unsupported unit size '%d' for analog-to-float conversion.",
+ analog->encoding->unitsize);
+ return SR_ERR;
+ }
+ return SR_OK;
}
if (analog->encoding->unitsize == sizeof(float)
return SR_OK;
}
-/**
- * Convert a floating point value to a string, limited to the given
- * number of decimal digits.
- *
- * @param[in] value The value to convert.
- * @param[in] digits Number of digits after the decimal point to print.
- * Must be >= 0.
- * @param[out] result Pointer to store result. Must not be NULL.
- *
- * The string is allocated by the function and must be freed by the caller
- * after use by calling g_free().
- *
- * @retval SR_OK Success.
- * @retval SR_ERR_ARG Invalid argument.
- *
- * @since 0.4.0
- */
-SR_API int sr_analog_float_to_string(float value, unsigned int digits, char **result)
-{
- unsigned int cnt, i;
-
- if (!result)
- return SR_ERR_ARG;
-
- /* This produces at least one too many digits. */
- *result = g_strdup_printf("%.*f", digits, value);
- for (i = 0, cnt = 0; (*result)[i]; i++) {
- if (isdigit((*result)[i++]))
- cnt++;
- if (cnt == digits) {
- (*result)[i] = 0;
- break;
- }
- }
-
- return SR_OK;
-}
-
/**
* Convert the unit/MQ/MQ flags in the analog struct to a string.
*