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From: Luke Robison <robison@arlut.utexas.edu>
To: git@vger.kernel.org
Subject: Understanding Binary Deltas within Packfile
Date: Tue, 20 Mar 2018 10:43:50 -0500	[thread overview]
Message-ID: <f301d093-af93-016b-79b9-3102475260cf@arlut.utexas.edu> (raw)

Is there any documentation of the contents of the binary delta datain a 
packfile, and how to interpret them?  I found 
https://github.com/git/git/blob/master/Documentation/technical/pack-format.txt 
documenting the packfile itself, but the "compressed delta data" seems 
largely undocumented.  The source code of 
https://github.com/git/git/blob/master/diff-delta.c is pretty dense.  
This is what I've got so for:

+-------------+
| Varint src_size
| Varint trg_size
| 1-byte inscnt
| N-bytes up to 16 bytes of trg_buf
|
| A series of Operations
|
+-------------


Any details on how to interpret the opcodes would be greatly appreciated.

Thanks,
Luke


             reply	other threads:[~2018-03-20 15:53 UTC|newest]

Thread overview: 4+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2018-03-20 15:43 Luke Robison [this message]
2018-03-20 16:03 ` Understanding Binary Deltas within Packfile Duy Nguyen
2018-03-20 18:34   ` Luke Robison
2018-03-20 19:12     ` Duy Nguyen

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