"""Python 'base64_codec' Codec - base64 content transfer encoding.

This codec de/encodes from bytes to bytes.

Written by Marc-Andre Lemburg ([email protected]).
"""

import codecs
import base64

### Codec APIs

def base64_encode(input, errors='strict'):
assert errors == 'strict'
return (base64.encodebytes(input), len(input))

def base64_decode(input, errors='strict'):
assert errors == 'strict'
return (base64.decodebytes(input), len(input))

class Codec(codecs.Codec):
def encode(self, input, errors='strict'):
return base64_encode(input, errors)
def decode(self, input, errors='strict'):
return base64_decode(input, errors)

class IncrementalEncoder(codecs.IncrementalEncoder):
def encode(self, input, final=False):
assert self.errors == 'strict'
return base64.encodebytes(input)

class IncrementalDecoder(codecs.IncrementalDecoder):
def decode(self, input, final=False):
assert self.errors == 'strict'
return base64.decodebytes(input)

class StreamWriter(Codec, codecs.StreamWriter):
charbuffertype = bytes

class StreamReader(Codec, codecs.StreamReader):
charbuffertype = bytes

### encodings module API

def getregentry():
return codecs.CodecInfo(
name='base64',
encode=base64_encode,
decode=base64_decode,
incrementalencoder=IncrementalEncoder,
incrementaldecoder=IncrementalDecoder,
streamwriter=StreamWriter,
streamreader=StreamReader,
_is_text_encoding=False,
)