tag_ape: move table lookup to tag_table.h

Allow code sharing.

src/tag_table.h

@@ -0,0 +1,43 @@
+/*
+ * Copyright (C) 2003-2010 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_TAG_TABLE_H
+#define MPD_TAG_TABLE_H
+
+#include "tag.h"
+
+#include <glib.h>
+
+/**
+ * Looks up a string in a tag translation table (case insensitive).
+ * Returns TAG_NUM_OF_ITEM_TYPES if the specified name was not found
+ * in the table.
+ */
+static inline enum tag_type
+tag_table_lookup(const char *const* table, const char *name)
+{
+	for (unsigned i = 0; i < TAG_NUM_OF_ITEM_TYPES; i++)
+		if (table[i] != NULL &&
+		    g_ascii_strcasecmp(name, table[i]) == 0)
+			return (enum tag_type)i;
+
+	return TAG_NUM_OF_ITEM_TYPES;
+}
+
+#endif