tree 1cc189885d98924650c5610c8e846e9b23ab45bc
parent 63f4a7fc0107ec240f48605a4d4f8e41b91caa41
author Jeff King <peff@peff.net> 1582519016 -0500
committer Junio C Hamano <gitster@pobox.com> 1582577753 -0800

packed_object_info(): use object_id for returning delta base

If a caller sets the object_info.delta_base_sha1 to a non-NULL pointer,
we'll write the oid of the object's delta base to it. But we can
increase our type safety by switching this to a real object_id struct.
All of our callers are just pointing into the hash member of an
object_id anyway, so there's no inconvenience.

Note that we do still keep it as a pointer-to-struct, because the NULL
sentinel value tells us whether the caller is even interested in the
information.

Signed-off-by: Jeff King <peff@peff.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>