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| author |  Peter Eriksen <s022018@student.dtu.dk> | 2008-04-06 22:51:49 +0200 |
|---|---|---|
| committer |  Junio C Hamano <gitster@pobox.com> | 2008-04-06 17:22:46 -0700 |
| commit | 9de328fea951eca9524feaa5eb55762467df6b98 (patch) | |
| tree | 130db814b2c6d3583f163cd034b8608d8ede75ed /Documentation/technical | |
| parent | git-pack-objects.txt: Make wording slightly less ambiguous (diff) | |
| download | tgif-9de328fea951eca9524feaa5eb55762467df6b98.tar.xz | |
Add description of OFS_DELTA to the pack format description
Signed-off-by: Peter Eriksen <s022018@student.dtu.dk>
Acked-by: Shawn O. Pearce <spearce@spearce.org>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
Diffstat (limited to 'Documentation/technical')
| -rw-r--r-- | Documentation/technical/pack-format.txt | 16 |
1 files changed, 15 insertions, 1 deletions
diff --git a/Documentation/technical/pack-format.txt b/Documentation/technical/pack-format.txt index aa87756a55..1803e64e46 100644 --- a/Documentation/technical/pack-format.txt +++ b/Documentation/technical/pack-format.txt @@ -103,10 +103,24 @@ Pack file entry: <+ packed object data: If it is not DELTA, then deflated bytes (the size above is the size before compression). - If it is DELTA, then + If it is REF_DELTA, then 20-byte base object name SHA1 (the size above is the size of the delta data that follows). delta data, deflated. + If it is OFS_DELTA, then + n-byte offset (see below) interpreted as a negative + offset from the type-byte of the header of the + ofs-delta entry (the size above is the size of + the delta data that follows). + delta data, deflated. + + offset encoding: + n bytes with MSB set in all but the last one. + The offset is then the number constructed by + concatenating the lower 7 bit of each byte, and + for n >= 2 adding 2^7 + 2^14 + ... + 2^(7*(n-1)) + to the result. + = Version 2 pack-*.idx files support packs larger than 4 GiB, and |