js-adler32/bin/adler32.py

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#!/usr/bin/env python
# adler32.py -- calculate adler32 checksum of data
# Copyright (C) 2016-present SheetJS
from zlib import adler32
from sys import argv, stdin
args=argv[1:]
payload=""
if len(args) == 0 or args[0] == "-":
payload = stdin.read()
else:
payload = open(args[0],"rb").read()
# NOTE: python 2 returns a signed value; python3 is unsigned
print adler32(payload)