In data compression, BCJ, short for Branch-Call-Jump, refers to a technique that improves the compression of machine code of executable binaries by replacing relative branch addresses with absolute ones. This allows a LZMA compressor to identify duplicate targets and archive higher compression rate.
BCJ is used in 7-zip compression utility as default filter for executable binaries.
pybcj is a python bindings with BCJ implementation by C language. The C codes are derived from p7zip, portable 7-zip implementation. pybcj support Intel/Amd x86/x86_64, Arm/Arm64, ArmThumb, Sparc, PPC, and IA64.
A development status is considered as Beta state.
As usual, you can install pybcj using python standard pip command.
pip install pybcj
Alternatively, one can also use conda:
conda install -c conda-forge pybcj
- When use it on MSYS2/Mingw64 environment, please set environment variable SETUPTOOLS_USE_DISTUTILS=stdlib to install.
- SPDX-License-Identifier: LGPL-2.1-or-later
- SPDX-URL: https://spdx.org/licenses/LGPL-2.1-or-later.html
- Copyright (C) 2020-2022 Hiroshi Miura
- Copyright (C) 1999-2010 Igor Pavlov