libsaria: Implement a next() function

This will pick the next song from the library to play.

include/libsaria/controls.h

@@ -0,0 +1,9 @@
+#ifndef LIBSARIA_CONTROLS_H
+#define LIBSARIA_CONTROLS_H
+
+namespace libsaria
+{
+	void next();
+};
+
+#endif /* LIBSARIA_CONTROLS_H */

include/libsaria/library.h

@@ -23,6 +23,7 @@ namespace libsaria
 		void update_path(string);
 		void refresh();
 
+		void next();
 		void add_path(string);
 		void remove_path(string);
 		void play_id(ino_t &);

libsaria/controls.cpp

@@ -0,0 +1,13 @@
+
+#include <libsaria/controls.h>
+#include <libsaria/library.h>
+
+namespace libsaria
+{
+
+	void next()
+	{
+		library::next();
+	}
+
+}; /* Namespace: libsaria */

libsaria/library/list.cpp

@@ -119,6 +119,14 @@ namespace libsaria
 		return false;
 	}
 
+	void library::next()
+	{
+		cur_track++;
+		if (cur_track == play_list.end())
+			cur_track = play_list.begin();
+		libsaria::audio::load((*cur_track)->get_filepath());
+	}
+
 	unsigned int library::size()
 	{
 		return play_list.size();