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authorMax Kellermann <max@duempel.org>2012-08-15 21:32:34 +0200
committerMax Kellermann <max@duempel.org>2012-08-15 23:02:27 +0200
commita6ac0f89656b9ef374703d24bbb27316a705eadc (patch)
tree3706b1b8474ae06890595a8e20c8be011f6a162b /src/DatabaseHelpers.hxx
parent4e1eb03287c1af889372ed4c63220a88d2032f78 (diff)
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DatabasePlugin: add method VisitUniqueTags()
Optimize the ProxyDatabase by invoking "list" on the peer, instead of visiting all songs.
Diffstat (limited to 'src/DatabaseHelpers.hxx')
-rw-r--r--src/DatabaseHelpers.hxx36
1 files changed, 36 insertions, 0 deletions
diff --git a/src/DatabaseHelpers.hxx b/src/DatabaseHelpers.hxx
new file mode 100644
index 000000000..83db182e2
--- /dev/null
+++ b/src/DatabaseHelpers.hxx
@@ -0,0 +1,36 @@
+/*
+ * Copyright (C) 2003-2012 The Music Player Daemon Project
+ * http://www.musicpd.org
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ */
+
+#ifndef MPD_MEMORY_DATABASE_PLUGIN_HXX
+#define MPD_MEMORY_DATABASE_PLUGIN_HXX
+
+#include "DatabaseVisitor.hxx"
+#include "tag.h"
+#include "gcc.h"
+
+class Database;
+struct DatabaseSelection;
+
+bool
+VisitUniqueTags(const Database &db, const DatabaseSelection &selection,
+ enum tag_type tag_type,
+ VisitString visit_string,
+ GError **error_r);
+
+#endif