From: Timo Sirainen <tss@iki.fi>
Date: Tue, 1 Jun 2010 15:01:21 +0000 (+0100)
Subject: header filter istream: Avoid seeking backwards when caller just wants to reset the... 
X-Git-Tag: 2.0.beta6~90
X-Git-Url: http://git.ipfire.org/gitweb.cgi?a=commitdiff_plain;h=9a1a2583687a5bd9d47bdfd435c78b46ca5d5af6;p=thirdparty%2Fdovecot%2Fcore.git

header filter istream: Avoid seeking backwards when caller just wants to reset the stream buffers.

--HG--
branch : HEAD
---

diff --git a/src/lib-mail/istream-header-filter.c b/src/lib-mail/istream-header-filter.c
index 4b1e19c9db..477302cdbd 100644
--- a/src/lib-mail/istream-header-filter.c
+++ b/src/lib-mail/istream-header-filter.c
@@ -353,6 +353,14 @@ static void i_stream_header_filter_seek(struct istream_private *stream,
 	struct header_filter_istream *mstream =
 		(struct header_filter_istream *)stream;
 
+	if (stream->istream.v_offset == v_offset) {
+		/* just reset the input buffer */
+		stream_reset_to(mstream, v_offset);
+		i_stream_seek(mstream->istream.parent,
+			      mstream->istream.parent_expected_offset);
+		return;
+	}
+
 	if (v_offset == 0) {
 		/* seeking to beginning of headers. */
 		stream_reset_to(mstream, 0);