static void maybe_read(struct thread *thread)
{
obj_t *fp = thread->fp;
int fd = fixnum_value(fp[-9]);
int nfound, res;
obj_t *old_sp;
nfound = input_available(fd);
if (nfound < 0) {
old_sp = pop_linkage(thread);
thread->sp = old_sp + 2;
old_sp[0] = obj_False;
old_sp[1] = make_fixnum(errno);
do_return(thread, old_sp, old_sp);
}
else if (nfound == 0)
wait_for_input(thread, fd, maybe_read);
else {
res = mindy_read(fd,
(char *)(buffer_data(fp[-8]) + fixnum_value(fp[-7])),
fixnum_value(fp[-6]));
results(thread, pop_linkage(thread), res, make_fixnum(res));
}
}
static int mindy_getchar ()
{
char c;
int num_read = mindy_read(0, &c, 1);
if (num_read < 1)
return EOF;
else
return c;
}