libsaria: Create iterator functions for the library

I use these to fill in the UI list for the library.  I think this will
be easier to use (and cleaner) than passing a function pointer to a
for_each loop.

include/libsaria/library.h

@@ -12,6 +12,14 @@ namespace libsaria
 {
 	namespace library
 	{
+
+		namespace iter
+		{
+			void reset();
+			libsaria::Track *next();
+			bool end();
+		} /* Namespace: iter */
+
 		struct PathInfo {
 			string path;
 			unsigned int size;

libsaria/library/list/iter.cpp

@@ -0,0 +1,34 @@
+
+#include <libsaria/track.h>
+#include <libsaria/library.h>
+#include "list.h"
+
+#include <list>
+using namespace std;
+
+list<libsaria::Track *>::iterator it;
+
+namespace libsaria
+{
+	namespace library
+	{
+
+		void iter::reset()
+		{
+			it = track_list.begin();
+		}
+
+		libsaria::Track *iter::next()
+		{
+			libsaria::Track *track = *it;
+			it++;
+			return track;
+		}
+
+		bool iter::end()
+		{
+			return it == track_list.end();
+		}
+
+	} /* Namespace: library */
+}; /* Namespace: libsaria */

libsaria/library/list/list.cpp

@@ -6,7 +6,7 @@
 #include <list>
 using namespace std;
 
-static list<libsaria::Track *> track_list;
+list<libsaria::Track *> track_list;
 
 static bool compare_tracks(libsaria::Track *one, libsaria::Track *two)
 {

libsaria/library/list/list.h

@@ -1,6 +1,11 @@
 #ifndef LIBSARIA_LIBRARY_LIST_H
 #define LIBSARIA_LIBRARY_LIST_H
 
+#include <list>
+using namespace std;
+
+extern list<libsaria::Track *> track_list;
+
 namespace libsaria
 {
 	namespace library