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| author |  Shawn Pearce <spearce@spearce.org> | 2006-05-29 03:17:18 -0400 |
|---|---|---|
| committer |  Junio C Hamano <junkio@cox.net> | 2006-05-30 23:09:02 -0700 |
| commit | 1361fa3e49717de9588e6d925073eb6885cedaa3 (patch) | |
| tree | e34ee57318307be3aaa4e7db393202e72602312a | |
| parent | git_exec_path, execv_git_cmd: ignore empty environment variables (diff) | |
| download | tgif-1361fa3e49717de9588e6d925073eb6885cedaa3.tar.xz | |
Improved pack format documentation.
While trying to implement a pack reader in Java I was mislead by
some facts listed in this documentation as well as found a few
details to be missing about the pack header.
Signed-off-by: Shawn O. Pearce <spearce@spearce.org>
Signed-off-by: Junio C Hamano <junkio@cox.net>
| -rw-r--r-- | Documentation/technical/pack-format.txt | 11 |
1 files changed, 8 insertions, 3 deletions
diff --git a/Documentation/technical/pack-format.txt b/Documentation/technical/pack-format.txt index ed2decc107..0e1ffb2427 100644 --- a/Documentation/technical/pack-format.txt +++ b/Documentation/technical/pack-format.txt @@ -5,8 +5,13 @@ GIT pack format - The header appears at the beginning and consists of the following: - 4-byte signature - 4-byte version number (network byte order) + 4-byte signature: + The signature is: {'P', 'A', 'C', 'K'} + + 4-byte version number (network byte order): + GIT currently accepts version number 2 or 3 but + generates version 2 only. + 4-byte number of objects contained in the pack (network byte order) Observation: we cannot have more than 4G versions ;-) and @@ -41,7 +46,7 @@ GIT pack format 8-byte integers to go beyond 4G objects per pack, but it is not strictly necessary. - - The header is followed by sorted 28-byte entries, one entry + - The header is followed by sorted 24-byte entries, one entry per object in the pack. Each entry is: 4-byte network byte order integer, recording where the |