packfile: use object_id in find_pack_entry_one()

The main function we use to search a pack index for an object is
find_pack_entry_one(). That function still takes a bare pointer to the
hash, despite the fact that its underlying bsearch_pack() function needs
an object_id struct. And so we end up making an extra copy of the hash
into the struct just to do a lookup.

As it turns out, all callers but one already have such an object_id. So
we can just take a pointer to that struct and use it directly. This
avoids the extra copy and provides a more type-safe interface.

The one exception is get_delta_base() in packfile.c, when we are chasing
a REF_DELTA from inside the pack (and thus we have a pointer directly to
the mmap'd pack memory, not a struct). We can just bump the hashcpy()
from inside find_pack_entry_one() to this one caller that needs it.

Signed-off-by: Jeff King <peff@peff.net>
Signed-off-by: Taylor Blau <me@ttaylorr.com>

1 files changed, 1 insertions, 1 deletions

diff --git a/midx.c b/midx.c
index 479812cb9b..e82d4f2e65 100644
--- a/midx.c
+++ b/midx.c
@@ -987,7 +987,7 @@ int verify_midx_file(struct repository *r, const char *object_dir, unsigned flag
 		}
 
 		m_offset = e.offset;
-		p_offset = find_pack_entry_one(oid.hash, e.p);
+		p_offset = find_pack_entry_one(&oid, e.p);
 
 		if (m_offset != p_offset)
 			midx_report(_("incorrect object offset for oid[%d] = %s: %"PRIx64" != %"PRIx64),