if (c == WEOF) return c;
/* Try conversion early so we can fail without locking if invalid */
- if (!isascii(c) && (l = wctomb(mbc, c)) < 0)
+ if (!isascii(c) && (l = wctomb((void *)mbc, c)) < 0)
return WEOF;
FLOCK(f);
f->mode |= f->mode+1;
- /* Fail if unreadable or writing and unable to flush */
- if ((f->flags & (F_ERR|F_NORD)) || (f->wpos && __oflow(f))) {
+ if ((!f->rend && __toread(f)) || f->rpos < f->buf - UNGET + l) {
FUNLOCK(f);
return EOF;
}
- /* Clear write mode */
- f->wpos = f->wstop = f->wend = 0;
-
- /* Put the file in read mode */
- if (!f->rpos) f->rpos = f->rend = f->buf;
-
- /* If unget buffer is nonempty, fail. */
- if (f->rpos < f->buf) {
- FUNLOCK(f);
- return WEOF;
- }
-
- /* Put character back into the buffer */
if (isascii(c)) *--f->rpos = c;
else memcpy(f->rpos -= l, mbc, l);
- /* Clear EOF */
f->flags &= ~F_EOF;
FUNLOCK(f);