Function encode

recipes/Python/511432_base255_V1/recipe-511432.py:22–34

Encode a string to base 255.

(string, divide=1024)

################################################################################

def encode(string, divide=1024):
    'Encode a string to base 255.'
    def encode(s):
        i = 0
        for c in s:
            i *= 257
            i += ord(c) + 1
        s = ''
        while i:
            s = chr(i % 254 + 2) + s
            i /= 254
        return s
    return '\1'.join(encode(string[index:index+divide]) for index in xrange(0, len(string), divide))

def decode(string):
    'Decode a string from base 255.'