db_save, state_file: convert to C++

1 files changed, 188 insertions, 0 deletions

diff --git a/src/DirectorySave.cxx b/src/DirectorySave.cxx
new file mode 100644
index 000000000..83a1ffd5a
--- /dev/null
+++ b/src/DirectorySave.cxx
@@ -0,0 +1,188 @@
+/*
+ * 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.h"
+#include "song.h"
+#include "SongSave.hxx"
+#include "PlaylistDatabase.hxx"
+
+extern "C" {
+#include "text_file.h"
+}
+
+#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 struct directory *directory)
+{
+	if (!directory_is_root(directory)) {
+		fprintf(fp, DIRECTORY_MTIME "%lu\n",
+			(unsigned long)directory->mtime);
+
+		fprintf(fp, "%s%s\n", DIRECTORY_BEGIN,
+			directory_get_path(directory));
+	}
+
+	struct 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_is_root(directory))
+		fprintf(fp, DIRECTORY_END "%s\n",
+			directory_get_path(directory));
+}
+
+static struct directory *
+directory_load_subdir(FILE *fp, struct directory *parent, const char *name,
+		      GString *buffer, GError **error_r)
+{
+	const char *line;
+	bool success;
+
+	if (directory_get_child(parent, name) != NULL) {
+		g_set_error(error_r, directory_quark(), 0,
+			    "Duplicate subdirectory '%s'", name);
+		return NULL;
+	}
+
+	struct directory *directory = directory_new_child(parent, name);
+
+	line = read_text_line(fp, buffer);
+	if (line == NULL) {
+		g_set_error(error_r, directory_quark(), 0,
+			    "Unexpected end of file");
+		directory_delete(directory);
+		return NULL;
+	}
+
+	if (g_str_has_prefix(line, DIRECTORY_MTIME)) {
+		directory->mtime =
+			g_ascii_strtoull(line + sizeof(DIRECTORY_MTIME) - 1,
+					 NULL, 10);
+
+		line = read_text_line(fp, buffer);
+		if (line == NULL) {
+			g_set_error(error_r, directory_quark(), 0,
+				    "Unexpected end of file");
+			directory_delete(directory);
+			return NULL;
+		}
+	}
+
+	if (!g_str_has_prefix(line, DIRECTORY_BEGIN)) {
+		g_set_error(error_r, directory_quark(), 0,
+			    "Malformed line: %s", line);
+		directory_delete(directory);
+		return NULL;
+	}
+
+	success = directory_load(fp, directory, buffer, error_r);
+	if (!success) {
+		directory_delete(directory);
+		return NULL;
+	}
+
+	return directory;
+}
+
+bool
+directory_load(FILE *fp, struct directory *directory,
+	       GString *buffer, GError **error)
+{
+	const char *line;
+
+	while ((line = read_text_line(fp, buffer)) != NULL &&
+	       !g_str_has_prefix(line, DIRECTORY_END)) {
+		if (g_str_has_prefix(line, DIRECTORY_DIR)) {
+			struct directory *subdir =
+				directory_load_subdir(fp, directory,
+						      line + sizeof(DIRECTORY_DIR) - 1,
+						      buffer, 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_get_song(directory, name) != NULL) {
+				g_set_error(error, directory_quark(), 0,
+					    "Duplicate song '%s'", name);
+				return false;
+			}
+
+			song = song_load(fp, directory, name,
+					 buffer, error);
+			if (song == NULL)
+				return false;
+
+			directory_add_song(directory, 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(fp, &directory->playlists,
+						    name, buffer, 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;
+}