+#elif defined __MINT__ /* Atari FreeMiNT */
+ if (!fp->__mode.__read)
+ return NULL;
+ size = fp->__get_limit - fp->__bufp;
+ if (size == 0)
+ return NULL;
+ *sizep = size;
+ return fp->__bufp;
+#elif defined EPLAN9 /* Plan9 */
+ if (fp->state == 4 /* WR */)
+ return NULL;
+ if (fp->rp >= fp->wp)
+ return NULL;
+ *sizep = fp->wp - fp->rp;
+ return fp->rp;
+#elif defined SLOW_BUT_NO_HACKS /* users can define this */
+ /* This implementation is correct on any ANSI C platform. It is just
+ awfully slow. */
+ return NULL;