✨ pyqbdiff ✨

The python binding for qbdiff

install

pip install qbdiff

Usage

from qbdiff import compute, patch, version, error

old = b"1234"
new_ = b"123456"
compute(old, new_, "diff_tmp.bin")
with open("diff_tmp.bin", "rb") as f:
    diff = f.read()
patch(old, diff, "new.bin")
with open("new.bin", "rb") as f:
    newf = f.read()
assert new_ == newf

• use QBDIFF_USE_CFFI env var to specify a backend

Public functions

QBERR_BADCKSUM: int
QBERR_BADPATCH: int
QBERR_IOERR: int
QBERR_LZMAERR: int
QBERR_NOMEM: int
QBERR_OK: int
QBERR_SAIS: int
QBERR_TRUNCPATCH: int

def version() -> str: ...
def error(code: int) -> str: ...
def compute(old: bytes, new_: bytes, diff_file: str) -> int: ...
def patch(old: bytes, patch_: bytes, new_file: str) -> int: ...

Build

Two env var is needed to build, LIB and INCLUDE. LIB is the path of liblzma.lib/liblzma.so, and INCLUDE is the directory of lzma.h

git submodule update --init --recursive
python setup.py sdist bdist_wheel --use-cython --use-cffi