directory.h

/* the Music Player Daemon (MPD)
 * Copyright (C) 2003-2007 by Warren Dukes (warren.dukes@gmail.com)
 * This project's homepage is: 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., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 */

#ifndef MPD_DIRECTORY_H
#define MPD_DIRECTORY_H

#include "dirvec.h"
#include "songvec.h"

#include <stdbool.h>
#include <sys/types.h>

#define DIRECTORY_DIR		"directory: "
#define DIRECTORY_MTIME		"mtime: " /* DEPRECATED, noop-read-only */
#define DIRECTORY_BEGIN		"begin: "
#define DIRECTORY_END		"end: "
#define DIRECTORY_INFO_BEGIN	"info_begin"
#define DIRECTORY_INFO_END	"info_end"
#define DIRECTORY_MPD_VERSION	"mpd_version: "
#define DIRECTORY_FS_CHARSET	"fs_charset: "

#define DEVICE_INARCHIVE	(unsigned)(-1)

struct directory {
	struct dirvec children;
	struct songvec songs;
	struct directory *parent;
	ino_t inode;
	dev_t device;
	unsigned stat; /* not needed if ino_t == dev_t == 0 is impossible */
	char path[sizeof(long)];
};

static inline bool
isRootDirectory(const char *name)
{
	return name[0] == 0 || (name[0] == '/' && name[1] == 0);
}

struct directory *
directory_new(const char *dirname, struct directory *parent);

void
directory_free(struct directory *directory);

static inline bool
directory_is_empty(const struct directory *directory)
{
	return directory->children.nr == 0 && directory->songs.nr == 0;
}

static inline const char *
directory_get_path(const struct directory *directory)
{
	return directory->path;
}

/**
 * Is this the root directory of the music database?
 */
static inline bool
directory_is_root(const struct directory *directory)
{
	return directory->parent == NULL;
}

/**
 * Returns the base name of the directory.
 */
const char *
directory_get_name(const struct directory *directory);

static inline struct directory *
directory_get_child(const struct directory *directory, const char *name)
{
	return dirvec_find(&directory->children, name);
}

static inline struct directory *
directory_new_child(struct directory *directory, const char *name)
{
	struct directory *subdir = directory_new(name, directory);
	dirvec_add(&directory->children, subdir);
	return subdir;
}

void
directory_prune_empty(struct directory *directory);

struct directory *
directory_get_directory(struct directory *directory, const char *name);

void
directory_sort(struct directory *directory);

int
directory_walk(struct directory *directory,
	       int (*forEachSong)(struct song *, void *),
	       int (*forEachDir)(struct directory *, void *),
	       void *data);

#endif