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- def encode(bindata):
- ''' Encode a bytearray to a Base91 string '''
- l = len(bindata)
- b = 0
- n = 0
- out = ''
- for byte in bindata:
- b |= struct.unpack('B', byte)[0] << n
- n += 8
- if n>13:
- v = b & 8191
- if v > 88:
- b >>= 13
- n -= 13
- else:
- v = b & 16383
- b >>= 14
- n -= 14
- out += base91_alphabet[v % 91] + base91_alphabet[v / 91]
- if n:
- out += base91_alphabet[b % 91]
- if n>7 or b>90:
- out += base91_alphabet[b / 91]
- return out
|
