adler32.py

#!python
import sys

MOD_ADLER = 65521

def adler32(s):
    a, b = 1, 0
    for c in s:
        a = (a + ord(c)) % MOD_ADLER
        b = (b + a) % MOD_ADLER
    return hex(b << 16 | a)[2:]


if __name__ == "__main__":
    for arg in sys.argv[1:]:
        print(adler32(arg))