- ret = printf_core(f, fmt, &ap2, nl_arg, nl_type);
+ olderr = f->flags & F_ERR;
+ if (f->mode < 1) f->flags &= ~F_ERR;
+ if (!f->buf_size) {
+ saved_buf = f->buf;
+ f->buf = internal_buf;
+ f->buf_size = sizeof internal_buf;
+ f->wpos = f->wbase = f->wend = 0;
+ }
+ if (!f->wend && __towrite(f)) ret = -1;
+ else ret = printf_core(f, fmt, &ap2, nl_arg, nl_type);
+ if (saved_buf) {
+ f->write(f, 0, 0);
+ if (!f->wpos) ret = -1;
+ f->buf = saved_buf;
+ f->buf_size = 0;
+ f->wpos = f->wbase = f->wend = 0;
+ }
+ if (f->flags & F_ERR) ret = -1;
+ f->flags |= olderr;