Mercurial > hg
annotate mercurial/cffi/mpatchbuild.py @ 46099:fd75e5c53ec3
simplemerge: avoid quadratic concatenation when building output text
I haven't checked if the difference is measurable, but the new version
is no less readable or idiomatic, so I don't think performance numbers
are needed.
Differential Revision: https://phab.mercurial-scm.org/D9549
author | Martin von Zweigbergk <martinvonz@google.com> |
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date | Tue, 08 Dec 2020 23:05:53 -0800 |
parents | 53607fd3ec6c |
children | 6000f5b25c9b |
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1 from __future__ import absolute_import |
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2 |
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3 import cffi |
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4 import os |
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5 |
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6 ffi = cffi.FFI() |
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7 mpatch_c = os.path.join( |
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8 os.path.join(os.path.dirname(__file__), '..', 'mpatch.c') |
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9 ) |
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10 with open(mpatch_c) as f: |
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11 ffi.set_source( |
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12 "mercurial.cffi._mpatch", f.read(), include_dirs=["mercurial"] |
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13 ) |
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14 ffi.cdef( |
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15 """ |
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16 |
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17 struct mpatch_frag { |
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18 int start, end, len; |
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19 const char *data; |
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20 }; |
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21 |
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22 struct mpatch_flist { |
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23 struct mpatch_frag *base, *head, *tail; |
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24 }; |
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25 |
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26 extern "Python" struct mpatch_flist* cffi_get_next_item(void*, ssize_t); |
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27 |
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28 int mpatch_decode(const char *bin, ssize_t len, struct mpatch_flist** res); |
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29 ssize_t mpatch_calcsize(size_t len, struct mpatch_flist *l); |
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30 void mpatch_lfree(struct mpatch_flist *a); |
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31 static int mpatch_apply(char *buf, const char *orig, size_t len, |
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32 struct mpatch_flist *l); |
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33 struct mpatch_flist *mpatch_fold(void *bins, |
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34 struct mpatch_flist* (*get_next_item)(void*, ssize_t), |
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35 ssize_t start, ssize_t end); |
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36 """ |
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37 ) |
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38 |
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39 if __name__ == '__main__': |
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40 ffi.compile() |