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annotate mercurial/cffi/mpatch.py @ 32512:0e8b0b9a7acc

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cffi: split modules from pure The copyright lines are updated per change history. cffi/osutil.py isn't tested since I have no access to OS X machine right now, sorry.
author Yuya Nishihara <yuya@tcha.org>
date Tue, 02 May 2017 21:15:31 +0900
parents mercurial/pure/mpatch.py@2dcb3d52ef41
children 25b37900d6e0
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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32512
0e8b0b9a7acc cffi: split modules from pure
Yuya Nishihara <yuya@tcha.org>
parents: 32506
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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
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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 if True:
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18 if True:
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19 @ffi.def_extern()
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20 def cffi_get_next_item(arg, pos):
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21 all, bins = ffi.from_handle(arg)
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22 container = ffi.new("struct mpatch_flist*[1]")
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23 to_pass = ffi.new("char[]", str(bins[pos]))
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24 all.append(to_pass)
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25 r = lib.mpatch_decode(to_pass, len(to_pass) - 1, container)
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26 if r < 0:
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27 return ffi.NULL
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28 return container[0]
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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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parents: 28861
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35 arg = (all, bins)
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36 patch = lib.mpatch_fold(ffi.new_handle(arg),
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parents: 28861
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37 lib.cffi_get_next_item, 0, lgt)
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parents: 28861
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38 if not patch:
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39 raise mpatchError("cannot decode chunk")
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40 outlen = lib.mpatch_calcsize(len(text), patch)
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parents: 28861
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41 if outlen < 0:
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42 lib.mpatch_lfree(patch)
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43 raise mpatchError("inconsistency detected")
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parents: 28861
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44 buf = ffi.new("char[]", outlen)
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parents: 28861
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45 if lib.mpatch_apply(buf, text, len(text), patch) < 0:
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parents: 28861
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46 lib.mpatch_lfree(patch)
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parents: 28861
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47 raise mpatchError("error applying patches")
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48 res = ffi.buffer(buf, outlen)[:]
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49 lib.mpatch_lfree(patch)
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50 return res