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Add description of OFS_DELTA to the pack format description

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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>
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Peter Eriksen 2008-04-06 22:51:49 +02:00 committed by Junio C Hamano
parent ba1333fec3
commit 9de328fea9
1 changed files with 15 additions and 1 deletions
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16
Documentation/technical/pack-format.txt
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@ -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