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mdiff: add helper for making deltas which replace the full text of a revision

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This helper will be used initially for censor-aware delta generation. Deltas
which replace the full contents of the base revision are guaranteed to apply
correctly regardless of whether the delta recipient has censored the base.

For background and broader design of the censorship feature, see:
http://mercurial.selenic.com/wiki/CensorPlan
This commit is contained in:
Mike Edgar 2015-01-21 16:35:09 -05:00
parent c736894d9c
commit af0ba8e839
1 changed files with 3 additions and 0 deletions
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3
mercurial/mdiff.py
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@ -367,6 +367,9 @@ def get_matching_blocks(a, b):
def trivialdiffheader(length):
return struct.pack(">lll", 0, 0, length)
def replacediffheader(oldlen, newlen):
return struct.pack(">lll", 0, oldlen, newlen)
patches = mpatch.patches
patchedsize = mpatch.patchedsize
textdiff = bdiff.bdiff