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"""Python 'hex_codec' Codec - 2-digit hex content transfer encoding.
This codec de/encodes from bytes to bytes.
Written by Marc-Andre Lemburg (mal@lemburg.com).
"""
import codecs
import binascii
### Codec APIs
def hex_encode(input, errors='strict'):
assert errors == 'strict'
return (binascii.b2a_hex(input), len(input))
def hex_decode(input, errors='strict'):
assert errors == 'strict'
return (binascii.a2b_hex(input), len(input))
class Codec(codecs.Codec):
def encode(self, input, errors='strict'):
return hex_encode(input, errors)
def decode(self, input, errors='strict'):
return hex_decode(input, errors)
class IncrementalEncoder(codecs.IncrementalEncoder):
def encode(self, input, final=False):
assert self.errors == 'strict'
return binascii.b2a_hex(input)
class IncrementalDecoder(codecs.IncrementalDecoder):
def decode(self, input, final=False):
assert self.errors == 'strict'
return binascii.a2b_hex(input)
class StreamWriter(Codec, codecs.StreamWriter):
charbuffertype = bytes
class StreamReader(Codec, codecs.StreamReader):
charbuffertype = bytes
### encodings module API
def getregentry():
return codecs.CodecInfo(
name='hex',
encode=hex_encode,
decode=hex_decode,
incrementalencoder=IncrementalEncoder,
incrementaldecoder=IncrementalDecoder,
streamwriter=StreamWriter,
streamreader=StreamReader,
_is_text_encoding=False,
)