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-rw-r--r--src/db/plugins/simple/DirectorySave.cxx207
1 files changed, 207 insertions, 0 deletions
diff --git a/src/db/plugins/simple/DirectorySave.cxx b/src/db/plugins/simple/DirectorySave.cxx
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index 000000000..e1650cbe8
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+++ b/src/db/plugins/simple/DirectorySave.cxx
@@ -0,0 +1,207 @@
+/*
+ * 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/io/TextFile.hxx"
+#include "fs/io/BufferedOutputStream.hxx"
+#include "util/StringUtil.hxx"
+#include "util/NumberParser.hxx"
+#include "util/Error.hxx"
+#include "util/Domain.hxx"
+
+#include <stddef.h>
+#include <string.h>
+
+#define DIRECTORY_DIR "directory: "
+#define DIRECTORY_TYPE "type: "
+#define DIRECTORY_MTIME "mtime: "
+#define DIRECTORY_BEGIN "begin: "
+#define DIRECTORY_END "end: "
+
+static constexpr Domain directory_domain("directory");
+
+gcc_const
+static const char *
+DeviceToTypeString(unsigned device)
+{
+ switch (device) {
+ case DEVICE_INARCHIVE:
+ return "archive";
+
+ case DEVICE_CONTAINER:
+ return "container";
+
+ default:
+ return nullptr;
+ }
+}
+
+gcc_pure
+static unsigned
+ParseTypeString(const char *type)
+{
+ if (strcmp(type, "archive") == 0)
+ return DEVICE_INARCHIVE;
+ else if (strcmp(type, "container") == 0)
+ return DEVICE_CONTAINER;
+ else
+ return 0;
+}
+
+void
+directory_save(BufferedOutputStream &os, const Directory &directory)
+{
+ if (!directory.IsRoot()) {
+ const char *type = DeviceToTypeString(directory.device);
+ if (type != nullptr)
+ os.Format(DIRECTORY_TYPE "%s\n", type);
+
+ if (directory.mtime != 0)
+ os.Format(DIRECTORY_MTIME "%lu\n",
+ (unsigned long)directory.mtime);
+
+ os.Format("%s%s\n", DIRECTORY_BEGIN, directory.GetPath());
+ }
+
+ for (const auto &child : directory.children) {
+ os.Format(DIRECTORY_DIR "%s\n", child.GetName());
+
+ if (!child.IsMount())
+ directory_save(os, child);
+
+ if (!os.Check())
+ return;
+ }
+
+ for (const auto &song : directory.songs)
+ song_save(os, song);
+
+ playlist_vector_save(os, directory.playlists);
+
+ if (!directory.IsRoot())
+ os.Format(DIRECTORY_END "%s\n", directory.GetPath());
+}
+
+static bool
+ParseLine(Directory &directory, const char *line)
+{
+ if (StringStartsWith(line, DIRECTORY_MTIME)) {
+ directory.mtime =
+ ParseUint64(line + sizeof(DIRECTORY_MTIME) - 1);
+ } else if (StringStartsWith(line, DIRECTORY_TYPE)) {
+ directory.device =
+ ParseTypeString(line + sizeof(DIRECTORY_TYPE) - 1);
+ } else
+ return false;
+
+ return true;
+}
+
+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);
+
+ while (true) {
+ const char *line = file.ReadLine();
+ if (line == nullptr) {
+ error.Set(directory_domain, "Unexpected end of file");
+ directory->Delete();
+ return nullptr;
+ }
+
+ if (StringStartsWith(line, DIRECTORY_BEGIN))
+ break;
+
+ if (!ParseLine(*directory, line)) {
+ 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;
+}