CL_VirtualFileSystem::CL_VirtualFileSystem(); CL_VirtualFileSystem::CL_VirtualFileSystem( CL_VirtualFileSource * provider); CL_VirtualFileSystem::CL_VirtualFileSystem( const CL_String & path, bool is_zip_file = false); CL_VirtualFileSystem::CL_VirtualFileSystem( class CL_NullVFS null_fs);