Tag: move configuration code to TagConfig.cxx

Allow using the Tag.cxx library without the Config library.

src/tag/TagConfig.cxx

@@ -0,0 +1,73 @@
+/*
+ * Copyright (C) 2003-2013 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.
+ */
+
+#include "config.h"
+#include "TagConfig.hxx"
+#include "TagInternal.hxx"
+#include "Tag.hxx"
+#include "ConfigGlobal.hxx"
+#include "ConfigOption.hxx"
+#include "system/FatalError.hxx"
+
+#include <glib.h>
+
+#include <algorithm>
+
+#include <string.h>
+
+void
+TagLoadConfig()
+{
+	const char *value = config_get_string(CONF_METADATA_TO_USE, nullptr);
+	if (value == nullptr)
+		return;
+
+	std::fill_n(ignore_tag_items, TAG_NUM_OF_ITEM_TYPES, true);
+
+	if (0 == g_ascii_strcasecmp(value, "none"))
+		return;
+
+	bool quit = false;
+	char *temp, *c, *s;
+	temp = c = s = g_strdup(value);
+	do {
+		if (*s == ',' || *s == '\0') {
+			if (*s == '\0')
+				quit = true;
+			*s = '\0';
+
+			c = g_strstrip(c);
+			if (*c == 0)
+				continue;
+
+			const auto type = tag_name_parse_i(c);
+			if (type == TAG_NUM_OF_ITEM_TYPES)
+				FormatFatalError("error parsing metadata item \"%s\"",
+						 c);
+
+			ignore_tag_items[type] = false;
+
+			s++;
+			c = s;
+		}
+		s++;
+	} while (!quit);
+
+	g_free(temp);
+}