sys/kern/subr_sbuf.c

361 	int len;
365 	len = s->s_drain_func(s->s_drain_arg, s->s_buf, s->s_len);
366 	if (len < 0) {
367 		s->s_error = -len;
370 	KASSERT(len > 0 && len <= s->s_len,
371 	    ("Bad drain amount %d for sbuf %p", len, s));
372 	s->s_len -= len;
383 	memmove(s->s_buf, s->s_buf + len, s->s_len);
393 sbuf_put_bytes(struct sbuf *s, const char *buf, size_t len)
402 	while (len > 0) {
410 			else if (sbuf_extend(s, len > INT_MAX ? INT_MAX : len)
417 		if (len < n)
418 			n = len;
423 		len -= n;
439 sbuf_bcat(struct sbuf *s, const void *buf, size_t len)
442 	sbuf_put_bytes(s, buf, len);
453 sbuf_bcopyin(struct sbuf *s, const void *uaddr, size_t len)
463 	if (len == 0)
465 	if (len > SBUF_FREESPACE(s)) {
466 		sbuf_extend(s, len - SBUF_FREESPACE(s));
467 		if (SBUF_FREESPACE(s) < len)
468 			len = SBUF_FREESPACE(s);
470 	if (copyin(uaddr, s->s_buf + s->s_len, len) != 0)
472 	s->s_len += len;
482 sbuf_bcpy(struct sbuf *s, const void *buf, size_t len)
489 	return (sbuf_bcat(s, buf, len));
512 sbuf_copyin(struct sbuf *s, const void *uaddr, size_t len)
524 	if (len == 0)
525 		len = SBUF_FREESPACE(s);	/* XXX return 0? */
526 	if (len > SBUF_FREESPACE(s)) {
527 		sbuf_extend(s, len);
528 		if (SBUF_FREESPACE(s) < len)
529 			len = SBUF_FREESPACE(s);
531 	switch (copyinstr(uaddr, s->s_buf + s->s_len, len + 1, &done)) {
599 	int error, len;
624 		len = vsnprintf(&s->s_buf[s->s_len], SBUF_FREESPACE(s) + 1,
626 		if (len < 0) {
632 		if (SBUF_FREESPACE(s) >= len)
638 			error = sbuf_extend(s, len - SBUF_FREESPACE(s));
650 	if (SBUF_FREESPACE(s) < len)
651 		len = SBUF_FREESPACE(s);
652 	s->s_len += len;
654 		s->s_sect_len += len;
788 	/* If finished, nulterm is already in len, else add one. */
854 	ssize_t len;
862 		len = roundup(s->s_sect_len, pad) - s->s_sect_len;
863 		for (; s->s_error == 0 && len > 0; len--)
866 	len = s->s_sect_len;
875 	return (len);