path: root/src/directory.c

/* 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
 */

#include "directory.h"

#include "utils.h"
#include "ack.h"
#include "myfprintf.h"
#include "dirvec.h"

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

	assert(dirname != NULL);
	assert((*dirname == 0) == (parent == NULL));

	dir = xcalloc(1, sizeof(struct directory));
	dir->path = xstrdup(dirname);
	dir->parent = parent;

	return dir;
}

void directory_free(struct directory *dir)
{
	dirvec_destroy(&dir->children);
	songvec_destroy(&dir->songs);
	free(dir->path);
	free(dir);
	/* this resets last dir returned */
	/*directory_get_path(NULL); */
}

void directory_prune_empty(struct directory *dir)
{
	int i;
	struct dirvec *dv = &dir->children;

	for (i = dv->nr; --i >= 0; ) {
		directory_prune_empty(dv->base[i]);
		if (directory_is_empty(dv->base[i]))
			dirvec_delete(dv, dv->base[i]);
	}
	if (!dv->nr)
		dirvec_destroy(dv);
}

struct directory *
directory_get_subdir(struct directory *dir, const char *name)
{
	struct directory *cur = dir;
	struct directory *found = NULL;
	char *duplicated;
	char *locate;

	assert(name != NULL);

	if (isRootDirectory(name))
		return dir;

	duplicated = xstrdup(name);
	locate = strchr(duplicated, '/');
	while (1) {
		if (locate)
			*locate = '\0';
		if (!(found = directory_get_child(cur, duplicated)))
			break;
		assert(cur == found->parent);
		cur = found;
		if (!locate)
			break;
		*locate = '/';
		locate = strchr(locate + 1, '/');
	}

	free(duplicated);

	return found;
}

void directory_sort(struct directory *dir)
{
	int i;
	struct dirvec *dv = &dir->children;

	dirvec_sort(dv);
	songvec_sort(&dir->songs);

	for (i = dv->nr; --i >= 0; )
		directory_sort(dv->base[i]);
}

int
directory_walk(struct directory *dir,
			  int (*forEachSong) (struct mpd_song *, void *),
			  int (*forEachDir) (struct directory *, void *),
			  void *data)
{
	struct dirvec *dv = &dir->children;
	int err = 0;
	size_t j;

	if (forEachDir && (err = forEachDir(dir, data)) < 0)
		return err;

	if (forEachSong) {
		err = songvec_for_each(&dir->songs, forEachSong, data);
		if (err < 0)
			return err;
	}

	for (j = 0; err >= 0 && j < dv->nr; ++j)
		err = directory_walk(dv->base[j], forEachSong,
						forEachDir, data);

	return err;
}