Shawn PearceWhile 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> --- Documentation/technical/pack-format.txt | 11 ++++++++--- 1 files changed, 8 insertions(+), 3 deletions(-)
Show changes to Documentation/technical/pack-format.txt +8 −3
diff --git a/Documentation/technical/pack-format.txt b/Documentation/technical/pack-format.txt index ed2decc..0e1ffb2 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
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