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/* 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 music_root;
struct directory * directory_new(const char *path, struct directory * parent)
{
struct directory *dir;
size_t pathlen;
assert(path);
assert(*path);
assert(parent);
pathlen = strlen(path);
dir = xcalloc(1, sizeof(*dir) - sizeof(dir->path) + pathlen + 1);
memcpy(dir->path, path, pathlen + 1);
dir->parent = parent;
return dir;
}
static int free_each_song(struct mpd_song *song, mpd_unused void *arg)
{
songvec_delete(&song->parent->songs, song);
song_free(song);
return 0;
}
static int free_each_dir(struct directory *dir, void *arg)
{
if (dir != arg) {
assert(dir != &music_root);
assert(dir->parent);
dirvec_delete(&dir->parent->children, dir);
assert(!dir->songs.nr);
assert(!dir->songs.base);
assert(!dir->children.nr);
assert(!dir->children.base);
free(dir);
}
return 0;
}
void directory_free(struct directory *dir)
{
if (dir != &music_root) {
assert(dir->parent);
dirvec_delete(&dir->parent->children, dir);
}
directory_walk(dir, free_each_song, free_each_dir, dir);
assert(!dir->songs.nr);
assert(!dir->songs.base);
assert(!dir->children.nr);
assert(!dir->children.base);
if (dir != &music_root)
free(dir);
}
static int dir_pruner(struct directory *dir, void *_dv)
{
directory_prune_empty(dir);
if (directory_is_empty(dir))
dirvec_delete((struct dirvec *)_dv, dir);
return 0;
}
void directory_prune_empty(struct directory *dir)
{
dirvec_for_each(&dir->children, dir_pruner, &dir->children);
}
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 (path_is_music_root(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;
}
struct dirwalk_arg {
int (*each_song) (struct mpd_song *, void *);
int (*each_dir) (struct directory *, void *);
void *data;
};
static int dirwalk_x(struct directory *dir, void *_arg)
{
struct dirwalk_arg *arg = _arg;
return directory_walk(dir, arg->each_song, arg->each_dir, arg->data);
}
int directory_walk(struct directory *dir,
int (*forEachSong) (struct mpd_song *, void *),
int (*forEachDir) (struct directory *, void *),
void *data)
{
int err = 0;
if (forEachDir && (err = forEachDir(dir, data)) < 0)
return err;
if (forEachSong) {
err = songvec_for_each(&dir->songs, forEachSong, data);
if (err < 0)
return err;
}
if (forEachDir) {
struct dirwalk_arg dw_arg;
dw_arg.each_song = forEachSong;
dw_arg.each_dir = forEachDir;
dw_arg.data = data;
err = dirvec_for_each(&dir->children, dirwalk_x, &dw_arg);
}
return err;
}
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