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/*
* Copyright (C) 2003-2011 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_DATABASE_H
#define MPD_DATABASE_H
#include "gcc.h"
#include <glib.h>
#include <sys/time.h>
#include <stdbool.h>
struct config_param;
struct directory;
struct db_selection;
struct db_visitor;
/**
* Initialize the database library.
*
* @param param the database configuration block
*/
bool
db_init(const struct config_param *param, GError **error_r);
void
db_finish(void);
/**
* Check whether the default #SimpleDatabasePlugin is used. This
* allows using db_get_root(), db_save(), db_get_mtime() and
* db_exists().
*/
bool
db_is_simple(void);
/**
* Returns the root directory object. Returns NULL if there is no
* configured music directory.
*
* May only be used if db_is_simple() returns true.
*/
gcc_pure
struct directory *
db_get_root(void);
/**
* Caller must lock the #db_mutex.
*/
gcc_nonnull(1)
gcc_pure
struct directory *
db_get_directory(const char *name);
gcc_nonnull(1)
gcc_pure
struct song *
db_get_song(const char *file);
/**
* May only be used if db_is_simple() returns true.
*/
bool
db_save(GError **error_r);
bool
db_load(GError **error);
/**
* May only be used if db_is_simple() returns true.
*/
gcc_pure
time_t
db_get_mtime(void);
/**
* Returns true if there is a valid database file on the disk.
*
* May only be used if db_is_simple() returns true.
*/
gcc_pure
static inline bool
db_exists(void)
{
/* mtime is set only if the database file was loaded or saved
successfully */
return db_get_mtime() > 0;
}
#endif
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