X-Git-Url: https://sigrok.org/gitweb/?a=blobdiff_plain;f=src%2Fdevice.c;h=dd34f79600dd4fe81797fad4b4b9a8cc3db46196;hb=1e7659609bddd40471faf9a8e81ee7554d77dce9;hp=01f413486357d546817c05c7bffc27974c031d13;hpb=41812aca436805b0614f2a8f31cf2f8ce494aea0;p=libsigrok.git

diff --git a/src/device.c b/src/device.c
index 01f41348..dd34f796 100644
--- a/src/device.c
+++ b/src/device.c
@@ -20,7 +20,7 @@
 #include <stdio.h>
 #include <glib.h>
 #include "config.h" /* Needed for HAVE_LIBUSB_1_0 and others. */
-#include "libsigrok.h"
+#include <libsigrok/libsigrok.h>
 #include "libsigrok-internal.h"
 
 /** @cond PRIVATE */
@@ -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.