playlist_{any,song,queue}: convert to C++

1 files changed, 173 insertions, 0 deletions

diff --git a/src/PlaylistSong.cxx b/src/PlaylistSong.cxx
new file mode 100644
index 00000000..03bf5b70
--- /dev/null
+++ b/src/PlaylistSong.cxx
@@ -0,0 +1,173 @@
+/*
+ * 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 "PlaylistSong.hxx"
+
+extern "C" {
+#include "database.h"
+#include "mapper.h"
+#include "song.h"
+#include "uri.h"
+#include "path.h"
+#include "ls.h"
+#include "tag.h"
+}
+
+#include <assert.h>
+#include <string.h>
+
+static void
+merge_song_metadata(struct song *dest, const struct song *base,
+		    const struct song *add)
+{
+	dest->tag = base->tag != NULL
+		? (add->tag != NULL
+		   ? tag_merge(base->tag, add->tag)
+		   : tag_dup(base->tag))
+		: (add->tag != NULL
+		   ? tag_dup(add->tag)
+		   : NULL);
+
+	dest->mtime = base->mtime;
+	dest->start_ms = add->start_ms;
+	dest->end_ms = add->end_ms;
+}
+
+static struct song *
+apply_song_metadata(struct song *dest, const struct song *src)
+{
+	struct song *tmp;
+
+	assert(dest != NULL);
+	assert(src != NULL);
+
+	if (src->tag == NULL && src->start_ms == 0 && src->end_ms == 0)
+		return dest;
+
+	if (song_in_database(dest)) {
+		char *path_fs = map_song_fs(dest);
+		if (path_fs == NULL)
+			return dest;
+
+		char *path_utf8 = fs_charset_to_utf8(path_fs);
+		if (path_utf8 != NULL)
+			g_free(path_fs);
+		else
+			path_utf8 = path_fs;
+
+		tmp = song_file_new(path_utf8, NULL);
+		g_free(path_utf8);
+
+		merge_song_metadata(tmp, dest, src);
+	} else {
+		tmp = song_file_new(dest->uri, NULL);
+		merge_song_metadata(tmp, dest, src);
+	}
+
+	if (dest->tag != NULL && dest->tag->time > 0 &&
+	    src->start_ms > 0 && src->end_ms == 0 &&
+	    src->start_ms / 1000 < (unsigned)dest->tag->time)
+		/* the range is open-ended, and the playlist plugin
+		   did not know the total length of the song file
+		   (e.g. last track on a CUE file); fix it up here */
+		tmp->tag->time = dest->tag->time - src->start_ms / 1000;
+
+	song_free(dest);
+	return tmp;
+}
+
+static struct song *
+playlist_check_load_song(const struct song *song, const char *uri, bool secure)
+{
+	struct song *dest;
+
+	if (uri_has_scheme(uri)) {
+		dest = song_remote_new(uri);
+	} else if (g_path_is_absolute(uri) && secure) {
+		dest = song_file_load(uri, NULL);
+		if (dest == NULL)
+			return NULL;
+	} else {
+		struct song *tmp = db_get_song(uri);
+		if (tmp == NULL)
+			/* not found in database */
+			return NULL;
+
+		dest = song_dup_detached(tmp);
+		db_return_song(tmp);
+	}
+
+	return apply_song_metadata(dest, song);
+}
+
+struct song *
+playlist_check_translate_song(struct song *song, const char *base_uri,
+			      bool secure)
+{
+	if (song_in_database(song))
+		/* already ok */
+		return song;
+
+	const char *uri = song->uri;
+
+	if (uri_has_scheme(uri)) {
+		if (uri_supported_scheme(uri))
+			/* valid remote song */
+			return song;
+		else {
+			/* unsupported remote song */
+			song_free(song);
+			return NULL;
+		}
+	}
+
+	if (base_uri != NULL && strcmp(base_uri, ".") == 0)
+		/* g_path_get_dirname() returns "." when there is no
+		   directory name in the given path; clear that now,
+		   because it would break the database lookup
+		   functions */
+		base_uri = NULL;
+
+	if (g_path_is_absolute(uri)) {
+		/* XXX fs_charset vs utf8? */
+		const char *suffix = map_to_relative_path(uri);
+		assert(suffix != NULL);
+
+		if (suffix != uri)
+			uri = suffix;
+		else if (!secure) {
+			/* local files must be relative to the music
+			   directory when "secure" is enabled */
+			song_free(song);
+			return NULL;
+		}
+
+		base_uri = NULL;
+	}
+
+	char *allocated = NULL;
+	if (base_uri != NULL)
+		uri = allocated = g_build_filename(base_uri, uri, NULL);
+
+	struct song *dest = playlist_check_load_song(song, uri, secure);
+	song_free(song);
+	g_free(allocated);
+	return dest;
+}