#define IOf_UNTAINT 16 /* consider this fp (and its data) "safe" */
#define IOf_NOLINE 32 /* slurped a pseudo-line from empty file */
#define IOf_FAKE_DIRP 64 /* xio_dirp is fake (source filters kludge) */
-#define IOf_DIR_UTF8 128 /* readdir tries to return utf8 */
/* The following macros define implementation-independent predicates on SVs. */