bring in buf_seek, buf_size and buf_left from bgpd

ok pyr@

2 files changed, 27 insertions, 2 deletions

diff --git a/usr.sbin/relayd/buffer.c b/usr.sbin/relayd/buffer.c
index 2f606dc2103..2aec7667d32 100644
--- a/usr.sbin/relayd/buffer.c
+++ b/usr.sbin/relayd/buffer.c
@@ -1,4 +1,4 @@
-/*	$OpenBSD: buffer.c,v 1.15 2009/06/02 21:44:22 eric Exp $	*/
+/*	$OpenBSD: buffer.c,v 1.16 2009/06/02 22:02:01 eric Exp $	*/
 
 /*
  * Copyright (c) 2003, 2004 Henning Brauer <henning@openbsd.org>
@@ -119,6 +119,28 @@ buf_reserve(struct buf *buf, size_t len)
 	return (b);
 }
 
+void *
+buf_seek(struct buf *buf, size_t pos, size_t len)
+{
+	/* only allowed to seek in already written parts */
+	if (pos + len > buf->wpos)
+		return (NULL);
+
+	return (buf->buf + pos);
+}
+
+size_t
+buf_size(struct buf *buf)
+{
+	return (buf->wpos);
+}
+
+size_t
+buf_left(struct buf *buf)
+{
+	return (buf->max - buf->wpos);
+}
+
 int
 buf_close(struct msgbuf *msgbuf, struct buf *buf)
 {
diff --git a/usr.sbin/relayd/relayd.h b/usr.sbin/relayd/relayd.h
index d2874385266..2bc243868c2 100644
--- a/usr.sbin/relayd/relayd.h
+++ b/usr.sbin/relayd/relayd.h
@@ -1,4 +1,4 @@
-/*	$OpenBSD: relayd.h,v 1.117 2009/06/02 21:44:22 eric Exp $	*/
+/*	$OpenBSD: relayd.h,v 1.118 2009/06/02 22:02:01 eric Exp $	*/
 
 /*
  * Copyright (c) 2006, 2007 Pierre-Yves Ritschard <pyr@openbsd.org>
@@ -789,6 +789,9 @@ struct buf	*buf_open(size_t);
 struct buf	*buf_dynamic(size_t, size_t);
 int		 buf_add(struct buf *, const void *, size_t);
 void		*buf_reserve(struct buf *, size_t);
+void		*buf_seek(struct buf *, size_t, size_t);
+size_t		 buf_size(struct buf *);
+size_t		 buf_left(struct buf *);
 int		 buf_close(struct msgbuf *, struct buf *);
 void		 buf_free(struct buf *);
 void		 msgbuf_init(struct msgbuf *);