drivers: Use g_strdup_printf() where possible.

src/hardware/hameg-hmo/protocol.c

@@ -481,7 +481,6 @@ SR_PRIV int hmo_update_sample_rate(const struct sr_dev_inst *sdi)
 	struct dev_context *devc;
 	struct scope_state *state;
 	const struct scope_config *config;
-
 	int tmp;
 	unsigned int i;
 	float tmp_float;
@@ -635,7 +634,6 @@ SR_PRIV void hmo_scope_state_free(struct scope_state *state)
 
 SR_PRIV int hmo_init_device(struct sr_dev_inst *sdi)
 {
-	char tmp[25];
 	int model_index;
 	unsigned int i, j, group;
 	struct sr_channel *ch;
@@ -684,11 +682,8 @@ SR_PRIV int hmo_init_device(struct sr_dev_inst *sdi)
 
 	/* Add digital channel groups. */
 	for (i = 0; i < scope_models[model_index].digital_pods; i++) {
-		g_snprintf(tmp, 25, "POD%d", i);
-
 		devc->digital_groups[i] = g_malloc0(sizeof(struct sr_channel_group));
-
+		devc->digital_groups[i]->name = g_strdup_printf("POD%d", i);
-		devc->digital_groups[i]->name = g_strdup(tmp);
 		sdi->channel_groups = g_slist_append(sdi->channel_groups,
 				   devc->digital_groups[i]);
 	}

src/hardware/yokogawa-dlm/protocol.c

@@ -769,7 +769,6 @@ SR_PRIV int dlm_model_get(char *model_id, char **model_name, int *model_index)
  */
 SR_PRIV int dlm_device_init(struct sr_dev_inst *sdi, int model_index)
 {
-	char tmp[25];
 	int i;
 	struct sr_channel *ch;
 	struct dev_context *devc;
@@ -799,13 +798,10 @@ SR_PRIV int dlm_device_init(struct sr_dev_inst *sdi, int model_index)
 
 	/* Add digital channel groups. */
 	for (i = 0; i < scope_models[model_index].pods; i++) {
-		g_snprintf(tmp, sizeof(tmp), "POD%d", i);
-
 		devc->digital_groups[i] = g_malloc0(sizeof(struct sr_channel_group));
 		if (!devc->digital_groups[i])
 			return SR_ERR_MALLOC;
-
+		devc->digital_groups[i]->name = g_strdup_printf("POD%d", i);
-		devc->digital_groups[i]->name = g_strdup(tmp);
 		sdi->channel_groups = g_slist_append(sdi->channel_groups,
 				devc->digital_groups[i]);
 	}

src/strutil.c

@@ -366,42 +366,31 @@ SR_API char *sr_samplerate_string(uint64_t samplerate)
 SR_API char *sr_period_string(uint64_t v_p, uint64_t v_q)
 {
 	double freq, v;
-	char *o;
+	int prec;
-	int prec, r;
 
 	freq = 1 / ((double)v_p / v_q);
 
-	o = g_malloc0(30 + 1);
-
 	if (freq > SR_GHZ(1)) {
 		v = (double)v_p / v_q * 1000000000000.0;
 		prec = ((v - (uint64_t)v) < FLT_MIN) ? 0 : 3;
-		r = snprintf(o, 30, "%.*f ps", prec, v);
+		return g_strdup_printf("%.*f ps", prec, v);
 	} else if (freq > SR_MHZ(1)) {
 		v = (double)v_p / v_q * 1000000000.0;
 		prec = ((v - (uint64_t)v) < FLT_MIN) ? 0 : 3;
-		r = snprintf(o, 30, "%.*f ns", prec, v);
+		return g_strdup_printf("%.*f ns", prec, v);
 	} else if (freq > SR_KHZ(1)) {
 		v = (double)v_p / v_q * 1000000.0;
 		prec = ((v - (uint64_t)v) < FLT_MIN) ? 0 : 3;
-		r = snprintf(o, 30, "%.*f us", prec, v);
+		return g_strdup_printf("%.*f us", prec, v);
 	} else if (freq > 1) {
 		v = (double)v_p / v_q * 1000.0;
 		prec = ((v - (uint64_t)v) < FLT_MIN) ? 0 : 3;
-		r = snprintf(o, 30, "%.*f ms", prec, v);
+		return g_strdup_printf("%.*f ms", prec, v);
 	} else {
 		v = (double)v_p / v_q;
 		prec = ((v - (uint64_t)v) < FLT_MIN) ? 0 : 3;
-		r = snprintf(o, 30, "%.*f s", prec, v);
+		return g_strdup_printf("%.*f s", prec, v);
 	}
-
-	if (r < 0) {
-		/* Something went wrong... */
-		g_free(o);
-		return NULL;
-	}
-
-	return o;
 }
 
 /**
@@ -422,25 +411,12 @@ SR_API char *sr_period_string(uint64_t v_p, uint64_t v_q)
  */
 SR_API char *sr_voltage_string(uint64_t v_p, uint64_t v_q)
 {
-	int r;
-	char *o;
-
-	o = g_malloc0(30 + 1);
-
 	if (v_q == 1000)
-		r = snprintf(o, 30, "%" PRIu64 "mV", v_p);
+		return g_strdup_printf("%" PRIu64 "mV", v_p);
 	else if (v_q == 1)
-		r = snprintf(o, 30, "%" PRIu64 "V", v_p);
+		return g_strdup_printf("%" PRIu64 "V", v_p);
 	else
-		r = snprintf(o, 30, "%gV", (float)v_p / (float)v_q);
+		return g_strdup_printf("%gV", (float)v_p / (float)v_q);
-
-	if (r < 0) {
-		/* Something went wrong... */
-		g_free(o);
-		return NULL;
-	}
-
-	return o;
 }
 
 /**