Mercurial > hg
view mercurial/cffi/mpatch.py @ 38618:c829749e7639
shelve: directly handle the initial parent alignment
Shelve is currently sub-contracting some of its work to the rebase extension.
In order to make shelve more independent and flexible we would like shelve to
handle the parent alignment directly.
After this change, we no longer need to use rebase in shelve.
Differential Revision: https://phab.mercurial-scm.org/D3693
author | Boris Feld <boris.feld@octobus.net> |
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date | Tue, 29 May 2018 00:30:50 +0200 |
parents | 857876ebaed4 |
children | 2372284d9457 |
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# mpatch.py - CFFI implementation of mpatch.c # # Copyright 2016 Maciej Fijalkowski <fijall@gmail.com> # # This software may be used and distributed according to the terms of the # GNU General Public License version 2 or any later version. from __future__ import absolute_import from ..pure.mpatch import * from ..pure.mpatch import mpatchError # silence pyflakes from . import _mpatch ffi = _mpatch.ffi lib = _mpatch.lib @ffi.def_extern() def cffi_get_next_item(arg, pos): all, bins = ffi.from_handle(arg) container = ffi.new("struct mpatch_flist*[1]") to_pass = ffi.new("char[]", str(bins[pos])) all.append(to_pass) r = lib.mpatch_decode(to_pass, len(to_pass) - 1, container) if r < 0: return ffi.NULL return container[0] def patches(text, bins): lgt = len(bins) all = [] if not lgt: return text arg = (all, bins) patch = lib.mpatch_fold(ffi.new_handle(arg), lib.cffi_get_next_item, 0, lgt) if not patch: raise mpatchError("cannot decode chunk") outlen = lib.mpatch_calcsize(len(text), patch) if outlen < 0: lib.mpatch_lfree(patch) raise mpatchError("inconsistency detected") buf = ffi.new("char[]", outlen) if lib.mpatch_apply(buf, text, len(text), patch) < 0: lib.mpatch_lfree(patch) raise mpatchError("error applying patches") res = ffi.buffer(buf, outlen)[:] lib.mpatch_lfree(patch) return res