diff options
Diffstat (limited to 'src/DirectorySave.cxx')
| -rw-r--r-- | src/DirectorySave.cxx | 180 |
1 files changed, 180 insertions, 0 deletions
diff --git a/src/DirectorySave.cxx b/src/DirectorySave.cxx new file mode 100644 index 00000000..6a5efb05 --- /dev/null +++ b/src/DirectorySave.cxx @@ -0,0 +1,180 @@ +/* + * 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. + */ + +#include "config.h" +#include "DirectorySave.hxx" +#include "Directory.hxx" +#include "song.h" +#include "SongSave.hxx" +#include "PlaylistDatabase.hxx" +#include "TextFile.hxx" + +#include <assert.h> +#include <string.h> + +#define DIRECTORY_DIR "directory: " +#define DIRECTORY_MTIME "mtime: " +#define DIRECTORY_BEGIN "begin: " +#define DIRECTORY_END "end: " + +/** + * The quark used for GError.domain. + */ +static inline GQuark +directory_quark(void) +{ + return g_quark_from_static_string("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) { + char *base = g_path_get_basename(cur->path); + + fprintf(fp, DIRECTORY_DIR "%s\n", base); + g_free(base); + + directory_save(fp, cur); + + if (ferror(fp)) + return; + } + + struct 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, + GError **error_r) +{ + bool success; + + if (parent->FindChild(name) != nullptr) { + g_set_error(error_r, directory_quark(), 0, + "Duplicate subdirectory '%s'", name); + return NULL; + } + + Directory *directory = parent->CreateChild(name); + + const char *line = file.ReadLine(); + if (line == NULL) { + g_set_error(error_r, directory_quark(), 0, + "Unexpected end of file"); + directory->Delete(); + return NULL; + } + + if (g_str_has_prefix(line, DIRECTORY_MTIME)) { + directory->mtime = + g_ascii_strtoull(line + sizeof(DIRECTORY_MTIME) - 1, + NULL, 10); + + line = file.ReadLine(); + if (line == NULL) { + g_set_error(error_r, directory_quark(), 0, + "Unexpected end of file"); + directory->Delete(); + return NULL; + } + } + + if (!g_str_has_prefix(line, DIRECTORY_BEGIN)) { + g_set_error(error_r, directory_quark(), 0, + "Malformed line: %s", line); + directory->Delete(); + return NULL; + } + + success = directory_load(file, directory, error_r); + if (!success) { + directory->Delete(); + return NULL; + } + + return directory; +} + +bool +directory_load(TextFile &file, Directory *directory, GError **error) +{ + const char *line; + + while ((line = file.ReadLine()) != NULL && + !g_str_has_prefix(line, DIRECTORY_END)) { + if (g_str_has_prefix(line, DIRECTORY_DIR)) { + Directory *subdir = + directory_load_subdir(file, directory, + line + sizeof(DIRECTORY_DIR) - 1, + error); + if (subdir == NULL) + return false; + } else if (g_str_has_prefix(line, SONG_BEGIN)) { + const char *name = line + sizeof(SONG_BEGIN) - 1; + struct song *song; + + if (directory->FindSong(name) != nullptr) { + g_set_error(error, directory_quark(), 0, + "Duplicate song '%s'", name); + return false; + } + + song = song_load(file, directory, name, error); + if (song == NULL) + return false; + + directory->AddSong(song); + } else if (g_str_has_prefix(line, PLAYLIST_META_BEGIN)) { + /* duplicate the name, because + playlist_metadata_load() will overwrite the + buffer */ + char *name = g_strdup(line + sizeof(PLAYLIST_META_BEGIN) - 1); + + if (!playlist_metadata_load(file, directory->playlists, + name, error)) { + g_free(name); + return false; + } + + g_free(name); + } else { + g_set_error(error, directory_quark(), 0, + "Malformed line: %s", line); + return false; + } + } + + return true; +} |