X-Git-Url: https://sigrok.org/gitweb/?a=blobdiff_plain;f=src%2Fanalog.c;h=d2677a576065ab5c9b81fe899a5f828da8dfd891;hb=7d65dd3a8654ff303c76b917865941e3ae379458;hp=4fd6a6f9a4410d06d0152e789b31bf662680ee6c;hpb=a5892391b02689d7babd98d44e6537b34cef8e80;p=libsigrok.git

diff --git a/src/analog.c b/src/analog.c
index 4fd6a6f9..d2677a57 100644
--- a/src/analog.c
+++ b/src/analog.c
@@ -17,35 +17,54 @@
  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
  */
 
+#include <config.h>
 #include <stdio.h>
 #include <stdint.h>
 #include <string.h>
 #include <ctype.h>
-#include "libsigrok.h"
+#include <libsigrok/libsigrok.h>
 #include "libsigrok-internal.h"
 
+/** @cond PRIVATE */
 #define LOG_PREFIX "analog"
+/** @endcond */
+
+/**
+ * @file
+ *
+ * Handling and converting analog data.
+ */
+
+/**
+ * @defgroup grp_analog Analog data handling
+ *
+ * Handling and converting analog data.
+ *
+ * @{
+ */
 
 struct unit_mq_string {
 	uint64_t value;
 	char *str;
 };
 
+/* Please use the same order as in enum sr_unit (libsigrok.h). */
 static struct unit_mq_string unit_strings[] = {
 	{ SR_UNIT_VOLT, "V" },
 	{ SR_UNIT_AMPERE, "A" },
 	{ SR_UNIT_OHM, "\xe2\x84\xa6" },
 	{ SR_UNIT_FARAD, "F" },
-	{ SR_UNIT_HENRY, "H" },
 	{ SR_UNIT_KELVIN, "K" },
 	{ SR_UNIT_CELSIUS, "\xc2\xb0""C" },
 	{ SR_UNIT_FAHRENHEIT, "\xc2\xb0""F" },
 	{ SR_UNIT_HERTZ, "Hz" },
 	{ SR_UNIT_PERCENTAGE, "%" },
+	{ SR_UNIT_BOOLEAN, "" },
 	{ SR_UNIT_SECOND, "s" },
 	{ SR_UNIT_SIEMENS, "S" },
 	{ SR_UNIT_DECIBEL_MW, "dBu" },
 	{ SR_UNIT_DECIBEL_VOLT, "dBv" },
+	{ SR_UNIT_UNITLESS, "" },
 	{ SR_UNIT_DECIBEL_SPL, "dB" },
 	{ SR_UNIT_CONCENTRATION, "ppm" },
 	{ SR_UNIT_REVOLUTIONS_PER_MINUTE, "RPM" },
@@ -56,19 +75,23 @@ static struct unit_mq_string unit_strings[] = {
 	{ SR_UNIT_HECTOPASCAL, "hPa" },
 	{ SR_UNIT_HUMIDITY_293K, "%rF" },
 	{ SR_UNIT_DEGREE, "\xc2\xb0" },
+	{ SR_UNIT_HENRY, "H" },
+	{ SR_UNIT_GRAM, "g" },
+	{ SR_UNIT_CARAT, "ct" },
+	{ SR_UNIT_OUNCE, "oz" },
+	{ SR_UNIT_TROY_OUNCE, "oz t" },
+	{ SR_UNIT_POUND, "lb" },
+	{ SR_UNIT_PENNYWEIGHT, "dwt" },
+	{ SR_UNIT_GRAIN, "gr" },
+	{ SR_UNIT_TAEL, "tael" },
+	{ SR_UNIT_MOMME, "momme" },
+	{ SR_UNIT_TOLA, "tola" },
+	{ SR_UNIT_PIECE, "pcs" },
 	ALL_ZERO
 };
 
+/* Please use the same order as in enum sr_mqflag (libsigrok.h). */
 static struct unit_mq_string mq_strings[] = {
-	{ SR_MQFLAG_SPL_FREQ_WEIGHT_A, "(A)" },
-	{ SR_MQFLAG_SPL_FREQ_WEIGHT_C, "(C)" },
-	{ SR_MQFLAG_SPL_FREQ_WEIGHT_Z, "(Z)" },
-	{ SR_MQFLAG_SPL_FREQ_WEIGHT_FLAT, "(SPL)" },
-	{ SR_MQFLAG_SPL_TIME_WEIGHT_S, " S" },
-	{ SR_MQFLAG_SPL_TIME_WEIGHT_F, " F" },
-	{ SR_MQFLAG_SPL_LAT, " LAT" },
-	/* Not a standard function for SLMs, so this is a made-up notation. */
-	{ SR_MQFLAG_SPL_PCT_OVER_ALARM, "%oA" },
 	{ SR_MQFLAG_AC, " AC" },
 	{ SR_MQFLAG_DC, " DC" },
 	{ SR_MQFLAG_RMS, " RMS" },
@@ -78,8 +101,19 @@ static struct unit_mq_string mq_strings[] = {
 	{ SR_MQFLAG_MIN, " MIN" },
 	{ SR_MQFLAG_AUTORANGE, " AUTO" },
 	{ SR_MQFLAG_RELATIVE, " REL" },
+	{ SR_MQFLAG_SPL_FREQ_WEIGHT_A, "(A)" },
+	{ SR_MQFLAG_SPL_FREQ_WEIGHT_C, "(C)" },
+	{ SR_MQFLAG_SPL_FREQ_WEIGHT_Z, "(Z)" },
+	{ SR_MQFLAG_SPL_FREQ_WEIGHT_FLAT, "(SPL)" },
+	{ SR_MQFLAG_SPL_TIME_WEIGHT_S, " S" },
+	{ SR_MQFLAG_SPL_TIME_WEIGHT_F, " F" },
+	{ SR_MQFLAG_SPL_LAT, " LAT" },
+	/* Not a standard function for SLMs, so this is a made-up notation. */
+	{ SR_MQFLAG_SPL_PCT_OVER_ALARM, "%oA" },
+	{ SR_MQFLAG_DURATION, " DURATION" },
 	{ SR_MQFLAG_AVG, " AVG" },
 	{ SR_MQFLAG_REFERENCE, " REF" },
+	{ SR_MQFLAG_UNSTABLE, " UNSTABLE" },
 	ALL_ZERO
 };
 
@@ -123,6 +157,8 @@ SR_API int sr_analog_to_float(const struct sr_datafeed_analog2 *analog,
 	float offset;
 	unsigned int b, i;
 	gboolean bigendian;
+	unsigned int count = (analog->num_samples
+			* g_slist_length(analog->meaning->channels));
 
 #ifdef WORDS_BIGENDIAN
 	bigendian = TRUE;
@@ -140,14 +176,16 @@ SR_API int sr_analog_to_float(const struct sr_datafeed_analog2 *analog,
 			&& (analog->encoding->scale.p == analog->encoding->scale.q)
 			&& analog->encoding->offset.p / (float)analog->encoding->offset.q == 0) {
 		/* The data is already in the right format. */
-		memcpy(outbuf, analog->data, analog->num_samples * sizeof(float));
+		memcpy(outbuf, analog->data, count * sizeof(float));
 	} else {
-		for (i = 0; i < analog->num_samples; i += analog->encoding->unitsize) {
+		for (i = 0; i < count; i += analog->encoding->unitsize) {
 			for (b = 0; b < analog->encoding->unitsize; b++) {
 				if (analog->encoding->is_bigendian == bigendian)
-					outbuf[i + b] = ((float *)analog->data)[i * analog->encoding->unitsize + b];
+					((uint8_t *)outbuf)[i + b] =
+						((uint8_t *)analog->data)[i * analog->encoding->unitsize + b];
 				else
-					outbuf[i + (analog->encoding->unitsize - b)] = ((float *)analog->data)[i * analog->encoding->unitsize + b];
+					((uint8_t *)outbuf)[i + (analog->encoding->unitsize - b)] =
+						((uint8_t *)analog->data)[i * analog->encoding->unitsize + b];
 			}
 			if (analog->encoding->scale.p != analog->encoding->scale.q)
 				outbuf[i] = (outbuf[i] * analog->encoding->scale.p) / analog->encoding->scale.q;
@@ -165,25 +203,26 @@ SR_API int sr_analog_to_float(const struct sr_datafeed_analog2 *analog,
  *
  * @param value The value to convert.
  * @param digits Number of digits after the decimal point to print.
- * @param outbuf Buffer in which the resulting string will be placed.
- * @param bufsize Size of the buffer in bytes.
+ * @param result Pointer to store result.
+ *
+ * The string is allocated by the function and must be freed by the caller
+ * after use by calling g_free().
  *
  * @retval SR_OK
  *
  * @since 0.4.0
  */
-SR_API int sr_analog_float_to_string(float value, int digits, char *outbuf,
-		int bufsize)
+SR_API int sr_analog_float_to_string(float value, int digits, char **result)
 {
 	int cnt, i;
 
 	/* This produces at least one too many digits */
-	snprintf(outbuf, bufsize, "%.*f", digits, value);
-	for (i = 0, cnt = 0; outbuf[i] && i < bufsize; i++) {
-		if (isdigit(outbuf[i++]))
+	*result = g_strdup_printf("%.*f", digits, value);
+	for (i = 0, cnt = 0; (*result)[i]; i++) {
+		if (isdigit((*result)[i++]))
 			cnt++;
 		if (cnt == digits) {
-			outbuf[i] = 0;
+			(*result)[i] = 0;
 			break;
 		}
 	}
@@ -195,34 +234,49 @@ SR_API int sr_analog_float_to_string(float value, int digits, char *outbuf,
  * Convert the unit/MQ/MQ flags in the analog struct to a string.
  *
  * @param analog Struct containing the unit, MQ and MQ flags.
- * @param outbuf Buffer in which the resulting string will be placed.
- * @param bufsize Size of the buffer in bytes.
+ * @param result Pointer to store result.
+ *
+ * The string is allocated by the function and must be freed by the caller
+ * after use by calling g_free().
  *
  * @retval SR_OK
  *
  * @since 0.4.0
  */
 SR_API int sr_analog_unit_to_string(const struct sr_datafeed_analog2 *analog,
-		char *outbuf, int bufsize)
+		char **result)
 {
-	int len, i;
+	int i;
+	GString *buf = g_string_new(NULL);
 
-	outbuf[0] = 0;
 	for (i = 0; unit_strings[i].value; i++) {
 		if (analog->meaning->unit == unit_strings[i].value) {
-			strncpy(outbuf, unit_strings[i].str, bufsize);
+			g_string_assign(buf, unit_strings[i].str);
 			break;
 		}
 	}
 
 	/* More than one MQ flag may apply. */
-	for (i = 0; mq_strings[i].value; i++) {
-		if (analog->meaning->mqflags & mq_strings[i].value) {
-			len = strlen(outbuf);
-			strncat(outbuf + len, mq_strings[i].str, bufsize - len);
-		}
-	}
+	for (i = 0; mq_strings[i].value; i++)
+		if (analog->meaning->mqflags & mq_strings[i].value)
+			g_string_append(buf, mq_strings[i].str);
+
+	*result = buf->str;
+	g_string_free(buf, FALSE);
 
 	return SR_OK;
 }
 
+/*
+ * Set sr_rational r to the given value.
+ *
+ * @param p Numerator
+ * @param q Denominator
+ */
+SR_API void sr_rational_set(struct sr_rational *r, uint64_t p, uint64_t q)
+{
+	r->p = p;
+	r->q = q;
+}
+
+/** @} */