decoder/sidplay: move code to ScanSidTuneInfo()

src/decoder/plugins/SidplayDecoderPlugin.cxx

@@ -410,31 +410,10 @@ GetInfoString(const SidTuneInfo &info, unsigned i)
 #endif
 }
 
-static bool
-sidplay_scan_file(Path path_fs,
+static void
+ScanSidTuneInfo(const SidTuneInfo &info, unsigned track, unsigned n_tracks,
 		const TagHandler &handler, void *handler_ctx)
 {
-	const auto container = ParseContainerPath(path_fs);
-	const unsigned song_num = container.track;
-
-#ifdef HAVE_SIDPLAYFP
-	SidTune tune(container.path.c_str());
-#else
-	SidTuneMod tune(container.path.c_str());
-#endif
-	if (!tune.getStatus())
-		return false;
-
-	tune.selectSong(song_num);
-
-#ifdef HAVE_SIDPLAYFP
-	const SidTuneInfo &info = *tune.getInfo();
-	const unsigned n_tracks = info.songs();
-#else
-	const SidTuneInfo &info = tune.getInfo();
-	const unsigned n_tracks = info.songs;
-#endif
-
 	/* title */
 	const char *title = GetInfoString(info, 0);
 	if (title == nullptr)
@@ -443,8 +422,8 @@ sidplay_scan_file(Path path_fs,
 	if (n_tracks > 1) {
 		char tag_title[1024];
 		snprintf(tag_title, sizeof(tag_title),
-			 "%s (%d/%u)",
-			 title, song_num, n_tracks);
+			 "%s (%u/%u)",
+			 title, track, n_tracks);
 		tag_handler_invoke_tag(handler, handler_ctx,
 				       TAG_TITLE, tag_title);
 	} else
@@ -463,9 +442,37 @@ sidplay_scan_file(Path path_fs,
 				       date);
 
 	/* track */
-	char track[16];
-	sprintf(track, "%d", song_num);
-	tag_handler_invoke_tag(handler, handler_ctx, TAG_TRACK, track);
+	char track_buffer[16];
+	sprintf(track_buffer, "%d", track);
+	tag_handler_invoke_tag(handler, handler_ctx, TAG_TRACK, track_buffer);
+}
+
+static bool
+sidplay_scan_file(Path path_fs,
+		  const TagHandler &handler, void *handler_ctx)
+{
+	const auto container = ParseContainerPath(path_fs);
+	const unsigned song_num = container.track;
+
+#ifdef HAVE_SIDPLAYFP
+	SidTune tune(container.path.c_str());
+#else
+	SidTuneMod tune(container.path.c_str());
+#endif
+	if (!tune.getStatus())
+		return false;
+
+	tune.selectSong(song_num);
+
+#ifdef HAVE_SIDPLAYFP
+	const SidTuneInfo &info = *tune.getInfo();
+	const unsigned n_tracks = info.songs();
+#else
+	const SidTuneInfo &info = tune.getInfo();
+	const unsigned n_tracks = info.songs;
+#endif
+
+	ScanSidTuneInfo(info, song_num, n_tracks, handler, handler_ctx);
 
 	/* time */
 	const auto duration = get_song_length(tune);