Mercurial > hg
view mercurial/cffi/mpatch.py @ 50793:1fbae268ecae
wrapfunction: use sysstr instead of bytes as argument in "sqlitestore"
This is as valid and simpler, it will help us to eventually get ride of
`safehasattr`.
author | Pierre-Yves David <pierre-yves.david@octobus.net> |
---|---|
date | Fri, 03 Feb 2023 04:27:17 +0100 |
parents | 94a797032fc4 |
children | ecc3a893979d |
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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 typing import List from ..pure.mpatch import * from ..pure.mpatch import mpatchError # silence pyflakes from . import _mpatch # pytype: disable=import-error 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(b"struct mpatch_flist*[1]") to_pass = ffi.new(b"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: bytes, bins: List[bytes]) -> bytes: 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(b"cannot decode chunk") outlen = lib.mpatch_calcsize(len(text), patch) if outlen < 0: lib.mpatch_lfree(patch) raise mpatchError(b"inconsistency detected") buf = ffi.new(b"char[]", outlen) if lib.mpatch_apply(buf, text, len(text), patch) < 0: lib.mpatch_lfree(patch) raise mpatchError(b"error applying patches") res = ffi.buffer(buf, outlen)[:] lib.mpatch_lfree(patch) return res