zzip_dirhandle, zzip_dirfd —
(ZZIP_DIR* dir) ;
zzip_dirhandle function will just return fp->dir
If a ZZIP_FILE is contained within a zip-file that one will be a valid pointer, otherwise a NULL is returned and the ZZIP_FILE wraps a real file.
zzip_dirfd function will just return dir->fd
If a ZZIP_DIR does point to a zipfile then the file-descriptor of that zipfile is returned, otherwise a NULL is returned and the ZZIP_DIR wraps a real directory DIR (if you have dirent on your system).