libsaria: Save tracks using for_each_item()

It's simpler than custom writing my own for each loop...

Signed-off-by: Bryan Schumaker <bjschuma@gmail.com>

include/libsaria/track.h

@@ -52,7 +52,7 @@ namespace libsaria
 			Track(ifstream &, library::Path *, unsigned int);
 			~Track();
 
-			void save(ofstream &);
+			void save(ofstream *);
 			void load_unlisted(bool);
 			void load(bool);
 			void add_playlist(libsaria::Playlist *);

libsaria/library/file.cpp

@@ -23,6 +23,11 @@ static string id_to_filename(unsigned int id)
 	return s.str();
 }
 
+static void save_track(libsaria::Track &track, void *data)
+{
+	track.save((ofstream *)data);
+}
+
 static void do_save_path(ofstream &stream, void *data)
 {
 	libsaria::library::Path *path = (libsaria::library::Path *)data;
@@ -34,8 +39,7 @@ static void do_save_path(ofstream &stream, void *data)
 	stream << path->id << " " << path->visible << " ";
 	stream << path->next_track << " " << path->_tracks.size() << "\n";
 
-	for (it = path->tracks.begin(); it != path->tracks.end(); it++)
-		(*it).save(stream);
+	path->_tracks.for_each_item(save_track, &stream);
 }
 
 void libsaria::library::save_path(libsaria::library::Path *path)

libsaria/track/track.cpp

@@ -197,27 +197,27 @@ namespace libsaria
 		return cur;
 	}
 
-	void Track::save(ofstream &out)
+	void Track::save(ofstream *out)
 	{
-		out << filepath		<< "\n";
-		out << title		<< "\n";
-		out << artist		<< "\n";
-		out << album		<< "\n";
-		out << comment		<< "\n";
-		out << genre		<< "\n";
-		out << lenstr		<< "\n";
-		out << id		<< " ";
-		out << year		<< " ";
-		out << track		<< " ";
-		out << count		<< " ";
-		out << last_day		<< " ";
-		out << last_month	<< " ";
-		out << last_year	<< " ";
-		out << length		<< " ";
-		out << bitrate		<< " ";
-		out << sample		<< " ";
-		out << channels		<< " ";
-		out << banned		<< "\n";
+		*out << filepath	<< "\n";
+		*out << title		<< "\n";
+		*out << artist		<< "\n";
+		*out << album		<< "\n";
+		*out << comment		<< "\n";
+		*out << genre		<< "\n";
+		*out << lenstr		<< "\n";
+		*out << id		<< " ";
+		*out << year		<< " ";
+		*out << track		<< " ";
+		*out << count		<< " ";
+		*out << last_day	<< " ";
+		*out << last_month	<< " ";
+		*out << last_year	<< " ";
+		*out << length		<< " ";
+		*out << bitrate		<< " ";
+		*out << sample		<< " ";
+		*out << channels	<< " ";
+		*out << banned		<< "\n";
 	}
 
 	void Track::add_playlist(Playlist *plist)