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pack-revindex: store entries directly in packed_git

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A pack_revindex struct has two elements: the revindex
entries themselves, and a pointer to the packed_git. We need
both to do lookups, because only the latter knows things
like the number of objects in the pack.

Now that packed_git contains the pack_revindex struct it's
just as easy to pass around the packed_git itself, and we do
not need the extra back-pointer.

We can instead just store the entries directly in the pack.
All functions which took a pack_revindex now just take a
packed_git. We still lazy-load in find_pack_revindex, so
most callers are unaffected.

The exception is the bitmap code, which computes the
revindex and caches the pointer when we load the bitmaps. We
can continue to load, drop the extra cache pointer, and just
access bitmap_git.pack.revindex directly.

Signed-off-by: Jeff King <peff@peff.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
This commit is contained in:
Jeff King
2015-12-21 01:20:33 -05:00
committed by Junio C Hamano
parent f4015337da
commit 9d98bbf578
4 changed files with 32 additions and 41 deletions
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11
pack-revindex.h
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@@ -1,18 +1,15 @@
#ifndef PACK_REVINDEX_H
#define PACK_REVINDEX_H
struct packed_git;
struct revindex_entry {
off_t offset;
unsigned int nr;
};
struct pack_revindex {
struct packed_git *p;
struct revindex_entry *revindex;
};
struct pack_revindex *revindex_for_pack(struct packed_git *p);
int find_revindex_position(struct pack_revindex *pridx, off_t ofs);
void load_pack_revindex(struct packed_git *p);
int find_revindex_position(struct packed_git *p, off_t ofs);
struct revindex_entry *find_pack_revindex(struct packed_git *p, off_t ofs);