"""Codec for quoted-printable encoding.

This codec de/encodes from bytes to bytes.
"""

import codecs
import quopri
from io import BytesIO

def quopri_encode(input, errors='strict'):
assert errors == 'strict'
f = BytesIO(input)
g = BytesIO()
quopri.encode(f, g, 1)
return (g.getvalue(), len(input))

def quopri_decode(input, errors='strict'):
assert errors == 'strict'
f = BytesIO(input)
g = BytesIO()
quopri.decode(f, g)
return (g.getvalue(), len(input))

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

class IncrementalEncoder(codecs.IncrementalEncoder):
def encode(self, input, final=False):
return quopri_encode(input, self.errors)[0]

class IncrementalDecoder(codecs.IncrementalDecoder):
def decode(self, input, final=False):
return quopri_decode(input, self.errors)[0]

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

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

# encodings module API

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