jpayne@68: """Codec for quoted-printable encoding.
jpayne@68: 
jpayne@68: This codec de/encodes from bytes to bytes.
jpayne@68: """
jpayne@68: 
jpayne@68: import codecs
jpayne@68: import quopri
jpayne@68: from io import BytesIO
jpayne@68: 
jpayne@68: def quopri_encode(input, errors='strict'):
jpayne@68:     assert errors == 'strict'
jpayne@68:     f = BytesIO(input)
jpayne@68:     g = BytesIO()
jpayne@68:     quopri.encode(f, g, quotetabs=True)
jpayne@68:     return (g.getvalue(), len(input))
jpayne@68: 
jpayne@68: def quopri_decode(input, errors='strict'):
jpayne@68:     assert errors == 'strict'
jpayne@68:     f = BytesIO(input)
jpayne@68:     g = BytesIO()
jpayne@68:     quopri.decode(f, g)
jpayne@68:     return (g.getvalue(), len(input))
jpayne@68: 
jpayne@68: class Codec(codecs.Codec):
jpayne@68:     def encode(self, input, errors='strict'):
jpayne@68:         return quopri_encode(input, errors)
jpayne@68:     def decode(self, input, errors='strict'):
jpayne@68:         return quopri_decode(input, errors)
jpayne@68: 
jpayne@68: class IncrementalEncoder(codecs.IncrementalEncoder):
jpayne@68:     def encode(self, input, final=False):
jpayne@68:         return quopri_encode(input, self.errors)[0]
jpayne@68: 
jpayne@68: class IncrementalDecoder(codecs.IncrementalDecoder):
jpayne@68:     def decode(self, input, final=False):
jpayne@68:         return quopri_decode(input, self.errors)[0]
jpayne@68: 
jpayne@68: class StreamWriter(Codec, codecs.StreamWriter):
jpayne@68:     charbuffertype = bytes
jpayne@68: 
jpayne@68: class StreamReader(Codec, codecs.StreamReader):
jpayne@68:     charbuffertype = bytes
jpayne@68: 
jpayne@68: # encodings module API
jpayne@68: 
jpayne@68: def getregentry():
jpayne@68:     return codecs.CodecInfo(
jpayne@68:         name='quopri',
jpayne@68:         encode=quopri_encode,
jpayne@68:         decode=quopri_decode,
jpayne@68:         incrementalencoder=IncrementalEncoder,
jpayne@68:         incrementaldecoder=IncrementalDecoder,
jpayne@68:         streamwriter=StreamWriter,
jpayne@68:         streamreader=StreamReader,
jpayne@68:         _is_text_encoding=False,
jpayne@68:     )