From 94cd775a6c52a99caeb1278c3d8044ee109e2d3e Mon Sep 17 00:00:00 2001 From: Taylor Blau Date: Fri, 20 May 2022 19:17:35 -0400 Subject: 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 Signed-off-by: Junio C Hamano --- pack-mtimes.h | 26 ++++++++++++++++++++++++++ 1 file changed, 26 insertions(+) create mode 100644 pack-mtimes.h (limited to 'pack-mtimes.h') diff --git a/pack-mtimes.h b/pack-mtimes.h new file mode 100644 index 0000000000..cc957b3e85 --- /dev/null +++ b/pack-mtimes.h @@ -0,0 +1,26 @@ +#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 -- cgit v1.2.3