Merge branch 'jk/pack-bitmap'

Borrow the bitmap index into packfiles from JGit to speed up
enumeration of objects involved in a commit range without having to
fully traverse the history.

* jk/pack-bitmap: (26 commits)
  ewah: unconditionally ntohll ewah data
  ewah: support platforms that require aligned reads
  read-cache: use get_be32 instead of hand-rolled ntoh_l
  block-sha1: factor out get_be and put_be wrappers
  do not discard revindex when re-preparing packfiles
  pack-bitmap: implement optional name_hash cache
  t/perf: add tests for pack bitmaps
  t: add basic bitmap functionality tests
  count-objects: recognize .bitmap in garbage-checking
  repack: consider bitmaps when performing repacks
  repack: handle optional files created by pack-objects
  repack: turn exts array into array-of-struct
  repack: stop using magic number for ARRAY_SIZE(exts)
  pack-objects: implement bitmap writing
  rev-list: add bitmap mode to speed up object lists
  pack-objects: use bitmaps when packing objects
  pack-objects: split add_object_entry
  pack-bitmap: add support for bitmap indexes
  documentation: add documentation for the bitmap format
  ewah: compressed bitmap implementation
  ...

1 files changed, 8 insertions, 1 deletions

diff --git a/pack-revindex.h b/pack-revindex.h
index 8d5027ad91..d737f98965 100644
--- a/pack-revindex.h
+++ b/pack-revindex.h
@@ -6,7 +6,14 @@ struct revindex_entry {
 	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);
+
 struct revindex_entry *find_pack_revindex(struct packed_git *p, off_t ofs);
-void discard_revindex(void);
 
 #endif