_IO_EOF_SEEN
if (sb->_flags & _IO_EOF_SEEN) {
_IO_mask_flags (fp, 0, _IO_EOF_SEEN);
_IO_mask_flags (fp, 0, _IO_EOF_SEEN);
_IO_mask_flags (fp, 0, _IO_EOF_SEEN);
_IO_mask_flags (fp, 0, _IO_EOF_SEEN);
fp->_flags |= _IO_EOF_SEEN;
fp->_flags |= _IO_EOF_SEEN;
if (fp->_flags & _IO_EOF_SEEN)
fp->_flags |= _IO_EOF_SEEN;
fp->_flags |= _IO_EOF_SEEN;
fp->_flags &= ~_IO_EOF_SEEN;
fp->_flags &= ~_IO_EOF_SEEN;
#define _IO_clearerr(FP) ((FP)->_flags &= ~(_IO_ERR_SEEN|_IO_EOF_SEEN))
#define _IO_feof_unlocked(__fp) (((__fp)->_flags & _IO_EOF_SEEN) != 0)
fp->_flags |= _IO_EOF_SEEN;
_IO_mask_flags (fp, 0, _IO_EOF_SEEN);
_IO_mask_flags (fp, 0, _IO_EOF_SEEN);
_IO_mask_flags (fp, 0, _IO_EOF_SEEN);
fp->_flags &= ~_IO_EOF_SEEN;
fp->_flags &= ~_IO_EOF_SEEN;