1  """Python 'hex_codec' Codec - 2-digit hex content transfer encoding.
       2  
       3  This codec de/encodes from bytes to bytes.
       4  
       5  Written by Marc-Andre Lemburg (mal@lemburg.com).
       6  """
       7  
       8  import codecs
       9  import binascii
      10  
      11  ### Codec APIs
      12  
      13  def hex_encode(input, errors='strict'):
      14      assert errors == 'strict'
      15      return (binascii.b2a_hex(input), len(input))
      16  
      17  def hex_decode(input, errors='strict'):
      18      assert errors == 'strict'
      19      return (binascii.a2b_hex(input), len(input))
      20  
      21  class ESC[4;38;5;81mCodec(ESC[4;38;5;149mcodecsESC[4;38;5;149m.ESC[4;38;5;149mCodec):
      22      def encode(self, input, errors='strict'):
      23          return hex_encode(input, errors)
      24      def decode(self, input, errors='strict'):
      25          return hex_decode(input, errors)
      26  
      27  class ESC[4;38;5;81mIncrementalEncoder(ESC[4;38;5;149mcodecsESC[4;38;5;149m.ESC[4;38;5;149mIncrementalEncoder):
      28      def encode(self, input, final=False):
      29          assert self.errors == 'strict'
      30          return binascii.b2a_hex(input)
      31  
      32  class ESC[4;38;5;81mIncrementalDecoder(ESC[4;38;5;149mcodecsESC[4;38;5;149m.ESC[4;38;5;149mIncrementalDecoder):
      33      def decode(self, input, final=False):
      34          assert self.errors == 'strict'
      35          return binascii.a2b_hex(input)
      36  
      37  class ESC[4;38;5;81mStreamWriter(ESC[4;38;5;149mCodec, ESC[4;38;5;149mcodecsESC[4;38;5;149m.ESC[4;38;5;149mStreamWriter):
      38      charbuffertype = bytes
      39  
      40  class ESC[4;38;5;81mStreamReader(ESC[4;38;5;149mCodec, ESC[4;38;5;149mcodecsESC[4;38;5;149m.ESC[4;38;5;149mStreamReader):
      41      charbuffertype = bytes
      42  
      43  ### encodings module API
      44  
      45  def getregentry():
      46      return codecs.CodecInfo(
      47          name='hex',
      48          encode=hex_encode,
      49          decode=hex_decode,
      50          incrementalencoder=IncrementalEncoder,
      51          incrementaldecoder=IncrementalDecoder,
      52          streamwriter=StreamWriter,
      53          streamreader=StreamReader,
      54          _is_text_encoding=False,
      55      )