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-rw-r--r--src/Directory.hxx263
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diff --git a/src/Directory.hxx b/src/Directory.hxx
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-/*
- * Copyright (C) 2003-2013 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_DIRECTORY_HXX
-#define MPD_DIRECTORY_HXX
-
-#include "check.h"
-#include "util/list.h"
-#include "Compiler.h"
-#include "DatabaseVisitor.hxx"
-#include "PlaylistVector.hxx"
-
-#include <sys/types.h>
-
-#define DEVICE_INARCHIVE (dev_t)(-1)
-#define DEVICE_CONTAINER (dev_t)(-2)
-
-#define directory_for_each_child(pos, directory) \
- list_for_each_entry(pos, &(directory).children, siblings)
-
-#define directory_for_each_child_safe(pos, n, directory) \
- list_for_each_entry_safe(pos, n, &(directory).children, siblings)
-
-#define directory_for_each_song(pos, directory) \
- list_for_each_entry(pos, &(directory).songs, siblings)
-
-#define directory_for_each_song_safe(pos, n, directory) \
- list_for_each_entry_safe(pos, n, &(directory).songs, siblings)
-
-struct Song;
-struct db_visitor;
-class SongFilter;
-class Error;
-
-struct Directory {
- /**
- * Pointers to the siblings of this directory within the
- * parent directory. It is unused (undefined) in the root
- * directory.
- *
- * This attribute is protected with the global #db_mutex.
- * Read access in the update thread does not need protection.
- */
- struct list_head siblings;
-
- /**
- * A doubly linked list of child directories.
- *
- * This attribute is protected with the global #db_mutex.
- * Read access in the update thread does not need protection.
- */
- struct list_head children;
-
- /**
- * A doubly linked list of songs within this directory.
- *
- * This attribute is protected with the global #db_mutex.
- * Read access in the update thread does not need protection.
- */
- struct list_head songs;
-
- PlaylistVector playlists;
-
- Directory *parent;
- time_t mtime;
- ino_t inode;
- dev_t device;
- bool have_stat; /* not needed if ino_t == dev_t == 0 is impossible */
- char path[sizeof(long)];
-
-protected:
- Directory(const char *path);
-
- gcc_malloc gcc_nonnull_all
- static Directory *Allocate(const char *path);
-
-public:
- /**
- * Default constructor, needed for #detached_root.
- */
- Directory();
- ~Directory();
-
- /**
- * Generic constructor for #Directory object.
- */
- gcc_malloc
- static Directory *NewGeneric(const char *path_utf8, Directory *parent);
-
- /**
- * Create a new root #Directory object.
- */
- gcc_malloc
- static Directory *NewRoot() {
- return NewGeneric("", nullptr);
- }
-
- /**
- * Free this #Directory object (and the whole object tree within it),
- * assuming it was already removed from the parent.
- */
- void Free();
-
- /**
- * Remove this #Directory object from its parent and free it. This
- * must not be called with the root Directory.
- *
- * Caller must lock the #db_mutex.
- */
- void Delete();
-
- /**
- * Create a new #Directory object as a child of the given one.
- *
- * Caller must lock the #db_mutex.
- *
- * @param name_utf8 the UTF-8 encoded name of the new sub directory
- */
- gcc_malloc
- Directory *CreateChild(const char *name_utf8);
-
- /**
- * Caller must lock the #db_mutex.
- */
- gcc_pure
- const Directory *FindChild(const char *name) const;
-
- gcc_pure
- Directory *FindChild(const char *name) {
- const Directory *cthis = this;
- return const_cast<Directory *>(cthis->FindChild(name));
- }
-
- /**
- * Look up a sub directory, and create the object if it does not
- * exist.
- *
- * Caller must lock the #db_mutex.
- */
- Directory *MakeChild(const char *name_utf8) {
- Directory *child = FindChild(name_utf8);
- if (child == nullptr)
- child = CreateChild(name_utf8);
- return child;
- }
-
- /**
- * Looks up a directory by its relative URI.
- *
- * @param uri the relative URI
- * @return the Directory, or nullptr if none was found
- */
- gcc_pure
- Directory *LookupDirectory(const char *uri);
-
- gcc_pure
- bool IsEmpty() const {
- return list_empty(&children) &&
- list_empty(&songs) &&
- playlists.empty();
- }
-
- gcc_pure
- const char *GetPath() const {
- return path;
- }
-
- /**
- * Returns the base name of the directory.
- */
- gcc_pure
- const char *GetName() const;
-
- /**
- * Is this the root directory of the music database?
- */
- gcc_pure
- bool IsRoot() const {
- return parent == nullptr;
- }
-
- /**
- * Look up a song in this directory by its name.
- *
- * Caller must lock the #db_mutex.
- */
- gcc_pure
- const Song *FindSong(const char *name_utf8) const;
-
- gcc_pure
- Song *FindSong(const char *name_utf8) {
- const Directory *cthis = this;
- return const_cast<Song *>(cthis->FindSong(name_utf8));
- }
-
- /**
- * Looks up a song by its relative URI.
- *
- * Caller must lock the #db_mutex.
- *
- * @param uri the relative URI
- * @return the song, or nullptr if none was found
- */
- gcc_pure
- Song *LookupSong(const char *uri);
-
- /**
- * Add a song object to this directory. Its "parent" attribute must
- * be set already.
- */
- void AddSong(Song *song);
-
- /**
- * Remove a song object from this directory (which effectively
- * invalidates the song object, because the "parent" attribute becomes
- * stale), but does not free it.
- */
- void RemoveSong(Song *song);
-
- /**
- * Caller must lock the #db_mutex.
- */
- void PruneEmpty();
-
- /**
- * Sort all directory entries recursively.
- *
- * Caller must lock the #db_mutex.
- */
- void Sort();
-
- /**
- * Caller must lock #db_mutex.
- */
- bool Walk(bool recursive, const SongFilter *match,
- VisitDirectory visit_directory, VisitSong visit_song,
- VisitPlaylist visit_playlist,
- Error &error) const;
-};
-
-static inline bool
-isRootDirectory(const char *name)
-{
- return name[0] == 0 || (name[0] == '/' && name[1] == 0);
-}
-
-#endif