Mercurial > hg
view 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> |
---|---|
date | Tue, 08 Dec 2020 23:05:53 -0800 |
parents | 53607fd3ec6c |
children | 6000f5b25c9b |
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from __future__ import absolute_import import cffi import os ffi = cffi.FFI() mpatch_c = os.path.join( os.path.join(os.path.dirname(__file__), '..', 'mpatch.c') ) with open(mpatch_c) as f: ffi.set_source( "mercurial.cffi._mpatch", f.read(), include_dirs=["mercurial"] ) ffi.cdef( """ struct mpatch_frag { int start, end, len; const char *data; }; struct mpatch_flist { struct mpatch_frag *base, *head, *tail; }; extern "Python" struct mpatch_flist* cffi_get_next_item(void*, ssize_t); int mpatch_decode(const char *bin, ssize_t len, struct mpatch_flist** res); ssize_t mpatch_calcsize(size_t len, struct mpatch_flist *l); void mpatch_lfree(struct mpatch_flist *a); static int mpatch_apply(char *buf, const char *orig, size_t len, struct mpatch_flist *l); struct mpatch_flist *mpatch_fold(void *bins, struct mpatch_flist* (*get_next_item)(void*, ssize_t), ssize_t start, ssize_t end); """ ) if __name__ == '__main__': ffi.compile()