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Python Source  |  2010-03-06  |  2.1 KB  |  70 lines
  1. """ Generic Python Character Mapping Codec.
  2.  
  3.     Use this codec directly rather than through the automatic
  4.     conversion mechanisms supplied by unicode() and .encode().
  5.  
  6.  
  7. Written by Marc-Andre Lemburg (mal@lemburg.com).
  8.  
  9. (c) Copyright CNRI, All Rights Reserved. NO WARRANTY.
  10.  
  11. """#"
  12.  
  13. import codecs
  14.  
  15. ### Codec APIs
  16.  
  17. class Codec(codecs.Codec):
  18.  
  19.     # Note: Binding these as C functions will result in the class not
  20.     # converting them to methods. This is intended.
  21.     encode = codecs.charmap_encode
  22.     decode = codecs.charmap_decode
  23.  
  24. class IncrementalEncoder(codecs.IncrementalEncoder):
  25.     def __init__(self, errors='strict', mapping=None):
  26.         codecs.IncrementalEncoder.__init__(self, errors)
  27.         self.mapping = mapping
  28.  
  29.     def encode(self, input, final=False):
  30.         return codecs.charmap_encode(input, self.errors, self.mapping)[0]
  31.  
  32. class IncrementalDecoder(codecs.IncrementalDecoder):
  33.     def __init__(self, errors='strict', mapping=None):
  34.         codecs.IncrementalDecoder.__init__(self, errors)
  35.         self.mapping = mapping
  36.  
  37.     def decode(self, input, final=False):
  38.         return codecs.charmap_decode(input, self.errors, self.mapping)[0]
  39.  
  40. class StreamWriter(Codec,codecs.StreamWriter):
  41.  
  42.     def __init__(self,stream,errors='strict',mapping=None):
  43.         codecs.StreamWriter.__init__(self,stream,errors)
  44.         self.mapping = mapping
  45.  
  46.     def encode(self,input,errors='strict'):
  47.         return Codec.encode(input,errors,self.mapping)
  48.  
  49. class StreamReader(Codec,codecs.StreamReader):
  50.  
  51.     def __init__(self,stream,errors='strict',mapping=None):
  52.         codecs.StreamReader.__init__(self,stream,errors)
  53.         self.mapping = mapping
  54.  
  55.     def decode(self,input,errors='strict'):
  56.         return Codec.decode(input,errors,self.mapping)
  57.  
  58. ### encodings module API
  59.  
  60. def getregentry():
  61.     return codecs.CodecInfo(
  62.         name='charmap',
  63.         encode=Codec.encode,
  64.         decode=Codec.decode,
  65.         incrementalencoder=IncrementalEncoder,
  66.         incrementaldecoder=IncrementalDecoder,
  67.         streamwriter=StreamWriter,
  68.         streamreader=StreamReader,
  69.     )
  70.