Make sr_next_enabled_channel() from scpi-pps available library-wide.

src/device.c

@@ -133,6 +133,25 @@ SR_API int sr_dev_channel_enable(struct sr_channel *channel,
 	return SR_OK;
 }
 
+/* Returns the next enabled channel, wrapping around if necessary. */
+SR_PRIV struct sr_channel *sr_next_enabled_channel(const struct sr_dev_inst *sdi,
+		struct sr_channel *cur_channel)
+{
+	struct sr_channel *next_channel;
+	GSList *l;
+
+	next_channel = cur_channel;
+	do {
+		l = g_slist_find(sdi->channels, next_channel);
+		if (l && l->next)
+			next_channel = l->next->data;
+		else
+			next_channel = sdi->channels->data;
+	} while (!next_channel->enabled);
+
+	return next_channel;
+}
+
 /**
  * Determine whether the specified device instance has the specified
  * capability.

src/hardware/scpi-pps/api.c

@@ -597,7 +597,7 @@ static int dev_acquisition_start(const struct sr_dev_inst *sdi, void *cb_data)
 	std_session_send_df_header(sdi, LOG_PREFIX);
 
 	/* Prime the pipe with the first channel's fetch. */
-	ch = next_enabled_channel(sdi, NULL);
+	ch = sr_next_enabled_channel(sdi, NULL);
 	pch = ch->priv;
 	if ((ret = select_channel(sdi, ch)) < 0)
 		return ret;

src/hardware/scpi-pps/protocol.c

@@ -53,24 +53,6 @@ SR_PRIV int select_channel(const struct sr_dev_inst *sdi, struct sr_channel *ch)
 	return ret;
 }
 
-SR_PRIV struct sr_channel *next_enabled_channel(const struct sr_dev_inst *sdi,
-		struct sr_channel *cur_channel)
-{
-	struct sr_channel *next_channel;
-	GSList *l;
-
-	next_channel = cur_channel;
-	do {
-		l = g_slist_find(sdi->channels, next_channel);
-		if (l && l->next)
-			next_channel = l->next->data;
-		else
-			next_channel = sdi->channels->data;
-	} while (!next_channel->enabled);
-
-	return next_channel;
-}
-
 SR_PRIV int scpi_pps_receive_data(int fd, int revents, void *cb_data)
 {
 	struct dev_context *devc;
@@ -115,7 +97,7 @@ SR_PRIV int scpi_pps_receive_data(int fd, int revents, void *cb_data)
 	}
 
 	if (g_slist_length(sdi->channels) > 1) {
-		next_channel = next_enabled_channel(sdi, devc->cur_channel);
+		next_channel = sr_next_enabled_channel(sdi, devc->cur_channel);
 		if (select_channel(sdi, next_channel) != SR_OK) {
 			sr_err("Failed to select channel %s", next_channel->name);
 			return FALSE;

src/hardware/scpi-pps/protocol.h

@@ -156,8 +156,6 @@ SR_PRIV extern const struct scpi_pps pps_profiles[];
 
 SR_PRIV const char *get_vendor(const char *raw_vendor);
 SR_PRIV int select_channel(const struct sr_dev_inst *sdi, struct sr_channel *ch);
-SR_PRIV struct sr_channel *next_enabled_channel(const struct sr_dev_inst *sdi,
-		struct sr_channel *cur_channel);
 SR_PRIV int scpi_pps_receive_data(int fd, int revents, void *cb_data);
 
 #endif

src/libsigrok-internal.h

@@ -632,6 +632,8 @@ enum {
 
 SR_PRIV struct sr_channel *sr_channel_new(struct sr_dev_inst *sdi,
 		int index, int type, gboolean enabled, const char *name);
+SR_PRIV struct sr_channel *sr_next_enabled_channel(const struct sr_dev_inst *sdi,
+		struct sr_channel *cur_channel);
 
 /** Device instance data */
 struct sr_dev_inst {