db_plugin: convert to C++

src/Directory.cxx

@@ -0,0 +1,318 @@
+/*
+ * Copyright (C) 2003-2011 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 "directory.h"
+
+extern "C" {
+#include "song.h"
+#include "song_sort.h"
+#include "playlist_vector.h"
+#include "path.h"
+#include "util/list_sort.h"
+#include "db_visitor.h"
+#include "db_lock.h"
+}
+
+#include <glib.h>
+
+#include <assert.h>
+#include <string.h>
+#include <stdlib.h>
+
+struct directory *
+directory_new(const char *path, struct directory *parent)
+{
+	size_t pathlen = strlen(path);
+
+	assert(path != NULL);
+	assert((*path == 0) == (parent == NULL));
+
+	struct directory *directory =
+		(struct directory *)g_malloc0(sizeof(*directory)
+					      - sizeof(directory->path)
+					      + pathlen + 1);
+	INIT_LIST_HEAD(&directory->children);
+	INIT_LIST_HEAD(&directory->songs);
+	INIT_LIST_HEAD(&directory->playlists);
+
+	directory->parent = parent;
+	memcpy(directory->path, path, pathlen + 1);
+
+	return directory;
+}
+
+void
+directory_free(struct directory *directory)
+{
+	playlist_vector_deinit(&directory->playlists);
+
+	struct song *song, *ns;
+	directory_for_each_song_safe(song, ns, directory)
+		song_free(song);
+
+	struct directory *child, *n;
+	directory_for_each_child_safe(child, n, directory)
+		directory_free(child);
+
+	g_free(directory);
+	/* this resets last dir returned */
+	/*directory_get_path(NULL); */
+}
+
+void
+directory_delete(struct directory *directory)
+{
+	assert(holding_db_lock());
+	assert(directory != NULL);
+	assert(directory->parent != NULL);
+
+	list_del(&directory->siblings);
+	directory_free(directory);
+}
+
+const char *
+directory_get_name(const struct directory *directory)
+{
+	assert(!directory_is_root(directory));
+	assert(directory->path != NULL);
+
+	const char *slash = strrchr(directory->path, '/');
+	assert((slash == NULL) == directory_is_root(directory->parent));
+
+	return slash != NULL
+		? slash + 1
+		: directory->path;
+}
+
+struct directory *
+directory_new_child(struct directory *parent, const char *name_utf8)
+{
+	assert(holding_db_lock());
+	assert(parent != NULL);
+	assert(name_utf8 != NULL);
+	assert(*name_utf8 != 0);
+
+	char *allocated;
+	const char *path_utf8;
+	if (directory_is_root(parent)) {
+		allocated = NULL;
+		path_utf8 = name_utf8;
+	} else {
+		allocated = g_strconcat(directory_get_path(parent),
+					"/", name_utf8, NULL);
+		path_utf8 = allocated;
+	}
+
+	struct directory *directory = directory_new(path_utf8, parent);
+	g_free(allocated);
+
+	list_add_tail(&directory->siblings, &parent->children);
+	return directory;
+}
+
+struct directory *
+directory_get_child(const struct directory *directory, const char *name)
+{
+	assert(holding_db_lock());
+
+	struct directory *child;
+	directory_for_each_child(child, directory)
+		if (strcmp(directory_get_name(child), name) == 0)
+			return child;
+
+	return NULL;
+}
+
+void
+directory_prune_empty(struct directory *directory)
+{
+	assert(holding_db_lock());
+
+	struct directory *child, *n;
+	directory_for_each_child_safe(child, n, directory) {
+		directory_prune_empty(child);
+
+		if (directory_is_empty(child))
+			directory_delete(child);
+	}
+}
+
+struct directory *
+directory_lookup_directory(struct directory *directory, const char *uri)
+{
+	assert(holding_db_lock());
+	assert(uri != NULL);
+
+	if (isRootDirectory(uri))
+		return directory;
+
+	char *duplicated = g_strdup(uri), *name = duplicated;
+
+	while (1) {
+		char *slash = strchr(name, '/');
+		if (slash == name) {
+			directory = NULL;
+			break;
+		}
+
+		if (slash != NULL)
+			*slash = '\0';
+
+		directory = directory_get_child(directory, name);
+		if (directory == NULL || slash == NULL)
+			break;
+
+		name = slash + 1;
+	}
+
+	g_free(duplicated);
+
+	return directory;
+}
+
+void
+directory_add_song(struct directory *directory, struct song *song)
+{
+	assert(holding_db_lock());
+	assert(directory != NULL);
+	assert(song != NULL);
+	assert(song->parent == directory);
+
+	list_add_tail(&song->siblings, &directory->songs);
+}
+
+void
+directory_remove_song(G_GNUC_UNUSED struct directory *directory,
+		      struct song *song)
+{
+	assert(holding_db_lock());
+	assert(directory != NULL);
+	assert(song != NULL);
+	assert(song->parent == directory);
+
+	list_del(&song->siblings);
+}
+
+struct song *
+directory_get_song(const struct directory *directory, const char *name_utf8)
+{
+	assert(holding_db_lock());
+	assert(directory != NULL);
+	assert(name_utf8 != NULL);
+
+	struct song *song;
+	directory_for_each_song(song, directory) {
+		assert(song->parent == directory);
+
+		if (strcmp(song->uri, name_utf8) == 0)
+			return song;
+	}
+
+	return NULL;
+}
+
+struct song *
+directory_lookup_song(struct directory *directory, const char *uri)
+{
+	char *duplicated, *base;
+
+	assert(holding_db_lock());
+	assert(directory != NULL);
+	assert(uri != NULL);
+
+	duplicated = g_strdup(uri);
+	base = strrchr(duplicated, '/');
+
+	if (base != NULL) {
+		*base++ = 0;
+		directory = directory_lookup_directory(directory, duplicated);
+		if (directory == NULL) {
+			g_free(duplicated);
+			return NULL;
+		}
+	} else
+		base = duplicated;
+
+	struct song *song = directory_get_song(directory, base);
+	assert(song == NULL || song->parent == directory);
+
+	g_free(duplicated);
+	return song;
+
+}
+
+static int
+directory_cmp(G_GNUC_UNUSED void *priv,
+	      struct list_head *_a, struct list_head *_b)
+{
+	const struct directory *a = (const struct directory *)_a;
+	const struct directory *b = (const struct directory *)_b;
+	return g_utf8_collate(a->path, b->path);
+}
+
+void
+directory_sort(struct directory *directory)
+{
+	assert(holding_db_lock());
+
+	list_sort(NULL, &directory->children, directory_cmp);
+	song_list_sort(&directory->songs);
+
+	struct directory *child;
+	directory_for_each_child(child, directory)
+		directory_sort(child);
+}
+
+bool
+directory::Walk(bool recursive,
+		VisitDirectory visit_directory, VisitSong visit_song,
+		VisitPlaylist visit_playlist,
+		GError **error_r) const
+{
+	assert(error_r == NULL || *error_r == NULL);
+
+	if (visit_song) {
+		struct song *song;
+		directory_for_each_song(song, this)
+			if (!visit_song(song, error_r))
+				return false;
+	}
+
+	if (visit_playlist) {
+		struct playlist_metadata *i;
+		directory_for_each_playlist(i, this)
+			if (!visit_playlist(i, this, error_r))
+				return false;
+	}
+
+	struct directory *child;
+	directory_for_each_child(child, this) {
+		if (visit_directory &&
+		    !visit_directory(child, error_r))
+			return false;
+
+		if (recursive &&
+		    !child->Walk(recursive, visit_directory, visit_song,
+				 visit_playlist, error_r))
+			return false;
+	}
+
+	return true;
+}