Database*: move to db/

src/db/DatabaseGlue.cxx

@@ -0,0 +1,152 @@
+/*
+ * Copyright (C) 2003-2014 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 "DatabaseGlue.hxx"
+#include "DatabaseSimple.hxx"
+#include "Registry.hxx"
+#include "DatabaseError.hxx"
+#include "Directory.hxx"
+#include "util/Error.hxx"
+#include "config/ConfigData.hxx"
+#include "Stats.hxx"
+#include "DatabasePlugin.hxx"
+#include "plugins/SimpleDatabasePlugin.hxx"
+
+#include <assert.h>
+#include <string.h>
+
+static Database *db;
+static bool db_is_open;
+static bool is_simple;
+
+bool
+DatabaseGlobalInit(EventLoop &loop, DatabaseListener &listener,
+		   const config_param &param, Error &error)
+{
+	assert(db == nullptr);
+	assert(!db_is_open);
+
+	const char *plugin_name =
+		param.GetBlockValue("plugin", "simple");
+	is_simple = strcmp(plugin_name, "simple") == 0;
+
+	const DatabasePlugin *plugin = GetDatabasePluginByName(plugin_name);
+	if (plugin == nullptr) {
+		error.Format(db_domain,
+			     "No such database plugin: %s", plugin_name);
+		return false;
+	}
+
+	db = plugin->create(loop, listener, param, error);
+	return db != nullptr;
+}
+
+void
+DatabaseGlobalDeinit(void)
+{
+	if (db_is_open)
+		db->Close();
+
+	if (db != nullptr)
+		delete db;
+}
+
+const Database *
+GetDatabase()
+{
+	assert(db == nullptr || db_is_open);
+
+	return db;
+}
+
+const Database *
+GetDatabase(Error &error)
+{
+	assert(db == nullptr || db_is_open);
+
+	if (db == nullptr)
+		error.Set(db_domain, DB_DISABLED, "No database");
+
+	return db;
+}
+
+bool
+db_is_simple(void)
+{
+	assert(db == nullptr || db_is_open);
+
+	return is_simple;
+}
+
+Directory *
+db_get_root(void)
+{
+	assert(db != nullptr);
+	assert(db_is_simple());
+
+	return ((SimpleDatabase *)db)->GetRoot();
+}
+
+Directory *
+db_get_directory(const char *name)
+{
+	if (db == nullptr)
+		return nullptr;
+
+	Directory *music_root = db_get_root();
+	if (name == nullptr)
+		return music_root;
+
+	return music_root->LookupDirectory(name);
+}
+
+bool
+db_save(Error &error)
+{
+	assert(db != nullptr);
+	assert(db_is_open);
+	assert(db_is_simple());
+
+	return ((SimpleDatabase *)db)->Save(error);
+}
+
+bool
+DatabaseGlobalOpen(Error &error)
+{
+	assert(db != nullptr);
+	assert(!db_is_open);
+
+	if (!db->Open(error))
+		return false;
+
+	db_is_open = true;
+
+	return true;
+}
+
+bool
+db_exists()
+{
+	assert(db != nullptr);
+	assert(db_is_open);
+	assert(db_is_simple());
+
+	return ((SimpleDatabase *)db)->GetUpdateStamp() > 0;
+}