From: Junio C Hamano <gitster@pobox•com>
To: Jeff King <peff@peff•net>
Cc: Dave Borowitz <dborowitz@google•com>, git@vger•kernel.org
Subject: Re: [PATCH 3/7] pack-protocol.txt: Mark all LFs in push-cert as required
Date: Fri, 03 Jul 2015 10:45:59 -0700 [thread overview]
Message-ID: <xmqq38155e3s.fsf@gitster.dls.corp.google.com> (raw)
In-Reply-To: <20150702135309.GA18286@peff.net> (Jeff King's message of "Thu, 2 Jul 2015 09:53:10 -0400")
Jeff King <peff@peff•net> writes:
> On Wed, Jul 01, 2015 at 01:39:49PM -0700, Junio C Hamano wrote:
>
>> There is a slight complication on sending an empty line without any
>> termination, though ;-) The reader that calls packet_read() cannot
>> tell such a payload from a flush packet, I think.
>>
>> *That* may be something we want to document.
>
> Usually flush packets are "0000", and an empty data packet
> is "0004". Or are you talking about some kind of flush inside the
> pkt-data stream?
Neither. At the wire level there is a difference, but the callers
of most often used function in pkt-line API, packet_read(), says
while (1) {
len = packet_read();
if (!len) {
/* flush */
break;
}
... do things on the "len" bytes received ...
... and then on to the next packet ...
}
I think the least intrusive change to the caller side would be
to teach packet_read() to keep a static and let the callers do
this:
while (1) {
len = packet_read();
if (!len && packet_last_was_flush()) {
/* flush */
break;
}
... do things on the "len" bytes received ...
... and then on to the next packet ...
}
even though that looks very ugly.
len = packet_read(..., &flag);
if (!len && (flag & PKT_LAST_WAS_FLUSH)) {
/* flush */
...
might be better.
next prev parent reply other threads:[~2015-07-03 17:46 UTC|newest]
Thread overview: 50+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-07-01 18:08 [PATCH 0/7] Clarify signed push protocol documentation Dave Borowitz
2015-07-01 18:08 ` [PATCH 1/7] pack-protocol.txt: Add warning about protocol inaccuracies Dave Borowitz
2015-07-01 19:39 ` Jonathan Nieder
2015-07-01 19:52 ` Junio C Hamano
2015-07-01 19:56 ` Dave Borowitz
2015-07-01 18:08 ` [PATCH 2/7] pack-protocol.txt: Mark LF in command-list as optional Dave Borowitz
2015-07-01 18:21 ` Stefan Beller
2015-07-01 18:46 ` Dave Borowitz
2015-07-01 18:08 ` [PATCH 3/7] pack-protocol.txt: Mark all LFs in push-cert as required Dave Borowitz
2015-07-01 20:00 ` Junio C Hamano
2015-07-01 20:07 ` Dave Borowitz
2015-07-01 20:49 ` Junio C Hamano
2015-07-06 14:46 ` Dave Borowitz
2015-07-06 15:22 ` Dave Borowitz
2015-07-06 15:27 ` Dave Borowitz
2015-07-06 15:29 ` Dave Borowitz
2015-07-06 15:35 ` Dave Borowitz
2015-07-06 16:12 ` Junio C Hamano
2015-07-06 15:46 ` Shawn Pearce
2015-07-06 16:28 ` Junio C Hamano
2015-07-06 16:28 ` Junio C Hamano
2015-07-06 16:38 ` Dave Borowitz
2015-07-06 16:57 ` Junio C Hamano
2015-07-06 17:11 ` Dave Borowitz
2015-07-06 17:18 ` Dave Borowitz
2015-07-06 17:34 ` Junio C Hamano
2015-07-06 17:38 ` Dave Borowitz
2015-07-06 18:06 ` Junio C Hamano
2015-07-06 18:08 ` Dave Borowitz
2015-07-06 18:23 ` Junio C Hamano
2015-07-06 17:30 ` Junio C Hamano
2015-07-06 17:35 ` Dave Borowitz
2015-07-06 17:59 ` Junio C Hamano
2015-07-01 20:36 ` Junio C Hamano
2015-07-01 20:39 ` Junio C Hamano
2015-07-02 13:53 ` Jeff King
2015-07-03 17:45 ` Junio C Hamano [this message]
2015-07-03 18:07 ` Jeff King
2015-07-03 18:43 ` Shawn Pearce
2015-07-03 18:46 ` Jeff King
2015-07-01 18:08 ` [PATCH 4/7] pack-protocol.txt: Elaborate on pusher identity Dave Borowitz
2015-07-01 18:58 ` Junio C Hamano
2015-07-01 18:08 ` [PATCH 5/7] pack-protocol.txt: Be more precise about pusher-key relationship Dave Borowitz
2015-07-01 18:08 ` [PATCH 6/7] pack-protocol.txt: Mark pushee field as optional Dave Borowitz
2015-07-01 18:56 ` Junio C Hamano
2015-07-01 19:06 ` Dave Borowitz
2015-07-01 19:07 ` Junio C Hamano
2015-07-01 19:08 ` Junio C Hamano
2015-07-01 19:31 ` Dave Borowitz
2015-07-01 18:08 ` [PATCH 7/7] send-pack.c: Die if the nonce is empty Dave Borowitz
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