X-Git-Url: https://sigrok.org/gitweb/?a=blobdiff_plain;ds=sidebyside;f=src%2Fdevice.c;h=dd34f79600dd4fe81797fad4b4b9a8cc3db46196;hb=1e7659609bddd40471faf9a8e81ee7554d77dce9;hp=fe3e231616e67c13989be8340cb74dcddd7195ae;hpb=c1aae90038456a61d0f9313d34e6107c3440d3e7;p=libsigrok.git

diff --git a/src/device.c b/src/device.c
index fe3e2316..dd34f796 100644
--- a/src/device.c
+++ b/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.