+{
+ add_pack(0, fn, filter);
+}
+
+void PackSource::add_pack_io(IO::Seekable &io, const string &fn)
+{
+ add_pack(&io, fn, string());
+}
+
+void PackSource::add_pack_io(IO::Seekable &io, const string &fn, const string &filter)
+{
+ add_pack(&io, fn, filter);
+}
+
+void PackSource::add_pack(IO::Seekable *io, const string &fn, const string &filter)