Mercurial > hg
annotate mercurial/cffi/mpatch.py @ 46209:a51d345f1404
upgrade: move optimization addition to determineactions()
The documentation of `determineactions()` mention that it is given a list
returned from `findoptimizations()` however it was not true before this patch.
The code extending actions with optimizations also mentioned about it that this
should be in determineactions.
So let's do what comments at couple of places say.
Differential Revision: https://phab.mercurial-scm.org/D9615
author | Pulkit Goyal <7895pulkit@gmail.com> |
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date | Wed, 16 Dec 2020 14:06:24 +0530 |
parents | 687b865b95ad |
children | 521ac0d7047f |
rev | line source |
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1 # mpatch.py - CFFI implementation of mpatch.c |
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2 # |
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3 # Copyright 2016 Maciej Fijalkowski <fijall@gmail.com> |
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4 # |
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5 # This software may be used and distributed according to the terms of the |
10263 | 6 # GNU General Public License version 2 or any later version. |
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7 |
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8 from __future__ import absolute_import |
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9 |
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10 from ..pure.mpatch import * |
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11 from ..pure.mpatch import mpatchError # silence pyflakes |
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12 from . import _mpatch |
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13 |
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14 ffi = _mpatch.ffi |
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15 lib = _mpatch.lib |
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16 |
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17 |
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18 @ffi.def_extern() |
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19 def cffi_get_next_item(arg, pos): |
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20 all, bins = ffi.from_handle(arg) |
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21 container = ffi.new(b"struct mpatch_flist*[1]") |
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22 to_pass = ffi.new(b"char[]", str(bins[pos])) |
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23 all.append(to_pass) |
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24 r = lib.mpatch_decode(to_pass, len(to_pass) - 1, container) |
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25 if r < 0: |
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26 return ffi.NULL |
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27 return container[0] |
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28 |
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29 |
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30 def patches(text, bins): |
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31 lgt = len(bins) |
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32 all = [] |
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33 if not lgt: |
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34 return text |
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35 arg = (all, bins) |
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36 patch = lib.mpatch_fold(ffi.new_handle(arg), lib.cffi_get_next_item, 0, lgt) |
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37 if not patch: |
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38 raise mpatchError(b"cannot decode chunk") |
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39 outlen = lib.mpatch_calcsize(len(text), patch) |
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40 if outlen < 0: |
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41 lib.mpatch_lfree(patch) |
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42 raise mpatchError(b"inconsistency detected") |
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43 buf = ffi.new(b"char[]", outlen) |
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44 if lib.mpatch_apply(buf, text, len(text), patch) < 0: |
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45 lib.mpatch_lfree(patch) |
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46 raise mpatchError(b"error applying patches") |
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47 res = ffi.buffer(buf, outlen)[:] |
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48 lib.mpatch_lfree(patch) |
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49 return res |