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