diff options
Diffstat (limited to '')
| -rw-r--r-- | src/db/DirectorySave.cxx | 163 |
1 files changed, 163 insertions, 0 deletions
diff --git a/src/db/DirectorySave.cxx b/src/db/DirectorySave.cxx new file mode 100644 index 000000000..499f84734 --- /dev/null +++ b/src/db/DirectorySave.cxx @@ -0,0 +1,163 @@ +/* + * Copyright (C) 2003-2014 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. + */ + +#include "config.h" +#include "DirectorySave.hxx" +#include "Directory.hxx" +#include "Song.hxx" +#include "SongSave.hxx" +#include "DetachedSong.hxx" +#include "PlaylistDatabase.hxx" +#include "fs/TextFile.hxx" +#include "util/StringUtil.hxx" +#include "util/NumberParser.hxx" +#include "util/Error.hxx" +#include "util/Domain.hxx" + +#include <stddef.h> + +#define DIRECTORY_DIR "directory: " +#define DIRECTORY_MTIME "mtime: " +#define DIRECTORY_BEGIN "begin: " +#define DIRECTORY_END "end: " + +static constexpr Domain directory_domain("directory"); + +void +directory_save(FILE *fp, const Directory &directory) +{ + if (!directory.IsRoot()) { + fprintf(fp, DIRECTORY_MTIME "%lu\n", + (unsigned long)directory.mtime); + + fprintf(fp, "%s%s\n", DIRECTORY_BEGIN, directory.GetPath()); + } + + Directory *cur; + directory_for_each_child(cur, directory) { + fprintf(fp, DIRECTORY_DIR "%s\n", cur->GetName()); + + directory_save(fp, *cur); + + if (ferror(fp)) + return; + } + + Song *song; + directory_for_each_song(song, directory) + song_save(fp, *song); + + playlist_vector_save(fp, directory.playlists); + + if (!directory.IsRoot()) + fprintf(fp, DIRECTORY_END "%s\n", directory.GetPath()); +} + +static Directory * +directory_load_subdir(TextFile &file, Directory &parent, const char *name, + Error &error) +{ + bool success; + + if (parent.FindChild(name) != nullptr) { + error.Format(directory_domain, + "Duplicate subdirectory '%s'", name); + return nullptr; + } + + Directory *directory = parent.CreateChild(name); + + const char *line = file.ReadLine(); + if (line == nullptr) { + error.Set(directory_domain, "Unexpected end of file"); + directory->Delete(); + return nullptr; + } + + if (StringStartsWith(line, DIRECTORY_MTIME)) { + directory->mtime = + ParseUint64(line + sizeof(DIRECTORY_MTIME) - 1); + + line = file.ReadLine(); + if (line == nullptr) { + error.Set(directory_domain, "Unexpected end of file"); + directory->Delete(); + return nullptr; + } + } + + if (!StringStartsWith(line, DIRECTORY_BEGIN)) { + error.Format(directory_domain, "Malformed line: %s", line); + directory->Delete(); + return nullptr; + } + + success = directory_load(file, *directory, error); + if (!success) { + directory->Delete(); + return nullptr; + } + + return directory; +} + +bool +directory_load(TextFile &file, Directory &directory, Error &error) +{ + const char *line; + + while ((line = file.ReadLine()) != nullptr && + !StringStartsWith(line, DIRECTORY_END)) { + if (StringStartsWith(line, DIRECTORY_DIR)) { + Directory *subdir = + directory_load_subdir(file, directory, + line + sizeof(DIRECTORY_DIR) - 1, + error); + if (subdir == nullptr) + return false; + } else if (StringStartsWith(line, SONG_BEGIN)) { + const char *name = line + sizeof(SONG_BEGIN) - 1; + + if (directory.FindSong(name) != nullptr) { + error.Format(directory_domain, + "Duplicate song '%s'", name); + return false; + } + + DetachedSong *song = song_load(file, name, error); + if (song == nullptr) + return false; + + directory.AddSong(Song::NewFrom(std::move(*song), + directory)); + delete song; + } else if (StringStartsWith(line, PLAYLIST_META_BEGIN)) { + const char *name = line + sizeof(PLAYLIST_META_BEGIN) - 1; + if (!playlist_metadata_load(file, directory.playlists, + name, error)) + return false; + } else { + error.Format(directory_domain, + "Malformed line: %s", line); + return false; + } + } + + return true; +} |