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Diffstat (limited to 'Lib/encodings/zlib_codec.py')
-rw-r--r-- | Lib/encodings/zlib_codec.py | 102 |
1 files changed, 0 insertions, 102 deletions
diff --git a/Lib/encodings/zlib_codec.py b/Lib/encodings/zlib_codec.py deleted file mode 100644 index 3419f9f..0000000 --- a/Lib/encodings/zlib_codec.py +++ /dev/null @@ -1,102 +0,0 @@ -""" Python 'zlib_codec' Codec - zlib compression encoding - - Unlike most of the other codecs which target Unicode, this codec - will return Python string objects for both encode and decode. - - Written by Marc-Andre Lemburg (mal@lemburg.com). - -""" -import codecs -import zlib # this codec needs the optional zlib module ! - -### Codec APIs - -def zlib_encode(input,errors='strict'): - - """ Encodes the object input and returns a tuple (output - object, length consumed). - - errors defines the error handling to apply. It defaults to - 'strict' handling which is the only currently supported - error handling for this codec. - - """ - assert errors == 'strict' - output = zlib.compress(input) - return (output, len(input)) - -def zlib_decode(input,errors='strict'): - - """ Decodes the object input and returns a tuple (output - object, length consumed). - - input must be an object which provides the bf_getreadbuf - buffer slot. Python strings, buffer objects and memory - mapped files are examples of objects providing this slot. - - errors defines the error handling to apply. It defaults to - 'strict' handling which is the only currently supported - error handling for this codec. - - """ - assert errors == 'strict' - output = zlib.decompress(input) - return (output, len(input)) - -class Codec(codecs.Codec): - - def encode(self, input, errors='strict'): - return zlib_encode(input, errors) - def decode(self, input, errors='strict'): - return zlib_decode(input, errors) - -class IncrementalEncoder(codecs.IncrementalEncoder): - def __init__(self, errors='strict'): - assert errors == 'strict' - self.errors = errors - self.compressobj = zlib.compressobj() - - def encode(self, input, final=False): - if final: - c = self.compressobj.compress(input) - return c + self.compressobj.flush() - else: - return self.compressobj.compress(input) - - def reset(self): - self.compressobj = zlib.compressobj() - -class IncrementalDecoder(codecs.IncrementalDecoder): - def __init__(self, errors='strict'): - assert errors == 'strict' - self.errors = errors - self.decompressobj = zlib.decompressobj() - - def decode(self, input, final=False): - if final: - c = self.decompressobj.decompress(input) - return c + self.decompressobj.flush() - else: - return self.decompressobj.decompress(input) - - def reset(self): - self.decompressobj = zlib.decompressobj() - -class StreamWriter(Codec,codecs.StreamWriter): - pass - -class StreamReader(Codec,codecs.StreamReader): - pass - -### encodings module API - -def getregentry(): - return codecs.CodecInfo( - name='zlib', - encode=zlib_encode, - decode=zlib_decode, - incrementalencoder=IncrementalEncoder, - incrementaldecoder=IncrementalDecoder, - streamreader=StreamReader, - streamwriter=StreamWriter, - ) |