git/pack-mtimes.h
Taylor Blau 94cd775a6c pack-mtimes: support reading .mtimes files
To store the individual mtimes of objects in a cruft pack, introduce a
new `.mtimes` format that can optionally accompany a single pack in the
repository.

The format is defined in Documentation/technical/pack-format.txt, and
stores a 4-byte network order timestamp for each object in name (index)
order.

This patch prepares for cruft packs by defining the `.mtimes` format,
and introducing a basic API that callers can use to read out individual
mtimes.

Signed-off-by: Taylor Blau <me@ttaylorr.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2022-05-26 15:48:26 -07:00

26 lines
658 B
C

#ifndef PACK_MTIMES_H
#define PACK_MTIMES_H
#include "git-compat-util.h"
#define MTIMES_SIGNATURE 0x4d544d45 /* "MTME" */
#define MTIMES_VERSION 1
struct packed_git;
/*
* Loads the .mtimes file corresponding to "p", if any, returning zero
* on success.
*/
int load_pack_mtimes(struct packed_git *p);
/* Returns the mtime associated with the object at position "pos" (in
* lexicographic/index order) in pack "p".
*
* Note that it is a BUG() to call this function if either (a) "p" does
* not have a corresponding .mtimes file, or (b) it does, but it hasn't
* been loaded
*/
uint32_t nth_packed_mtime(struct packed_git *p, uint32_t pos);
#endif