Mercurial > public > mercurial-scm > hg-stable
diff mercurial/mdiff.py @ 27711:7a678a12a5cf
mdiff: don't emit a diff header for empty trivial deltas
An empty trivial delta, coded as (0, 0, 0) makes the delta application
do nothing, but still takes 12 bytes, while skipping it altogether works
as much, without taking any space at all.
| author | Mike Hommey <mh@glandium.org> |
|---|---|
| date | Mon, 11 Jan 2016 22:00:07 -0500 |
| parents | 0d7635dca691 |
| children | 30789efb1e5e |
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--- a/mercurial/mdiff.py Mon Jan 11 09:49:48 2016 -0800 +++ b/mercurial/mdiff.py Mon Jan 11 22:00:07 2016 -0500 @@ -376,7 +376,7 @@ return [(d[0], d[2], d[1] - d[0]) for d in bdiff.blocks(a, b)] def trivialdiffheader(length): - return struct.pack(">lll", 0, 0, length) + return struct.pack(">lll", 0, 0, length) if length else '' def replacediffheader(oldlen, newlen): return struct.pack(">lll", 0, oldlen, newlen)