Re: Mozilla .git tree

From: A Large Angry SCM <gitzilla@gmail.com>
Date: Sep 1, 2006, 17:45 UTC
Message-ID: <44F871BA.3070303@gmail.com>
In-Reply-To: <7vzmdmh2lu.fsf@assigned-by-dhcp.cox.net>

Junio C Hamano wrote:

Show 9 quoted lines

> Nicolas Pitre <nico@cam.org> writes:
> 
>> And the zlib header contains a CRC which we're about to use for 
>> validating the data when doing delta data reuse in order to prevent pack 
>> corruption propagation like the one recently posted on the list.  
> 
> Ah, never thought of using the CRC directly.  I was thinking
> about inflating into void and see if it succeeds, which as you
> say is perhaps quite expensive.

Unfortunately, the zlib CRC is of the _uncompressed_ data [1], so inflating the stream is still necessary to check for corruption.

[1] RFC 1950, "ZLIB Compressed Data Format Specification", May 1996. Pages 4-6.

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