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encodings
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zlib_codec.pyc
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2011-03-24
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# Source Generated with Decompyle++
# File: in.pyc (Python 2.7)
""" 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
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.
"""
if not errors == 'strict':
raise AssertionError
output = None.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.
"""
if not errors == 'strict':
raise AssertionError
output = None.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'):
if not errors == 'strict':
raise AssertionError
self.errors = None
self.compressobj = zlib.compressobj()
def encode(self, input, final = False):
if final:
c = self.compressobj.compress(input)
return c + self.compressobj.flush()
return None.compressobj.compress(input)
def reset(self):
self.compressobj = zlib.compressobj()
class IncrementalDecoder(codecs.IncrementalDecoder):
def __init__(self, errors = 'strict'):
if not errors == 'strict':
raise AssertionError
self.errors = None
self.decompressobj = zlib.decompressobj()
def decode(self, input, final = False):
if final:
c = self.decompressobj.decompress(input)
return c + self.decompressobj.flush()
return None.decompressobj.decompress(input)
def reset(self):
self.decompressobj = zlib.decompressobj()
class StreamWriter(Codec, codecs.StreamWriter):
pass
class StreamReader(Codec, codecs.StreamReader):
pass
def getregentry():
return codecs.CodecInfo(name = 'zlib', encode = zlib_encode, decode = zlib_decode, incrementalencoder = IncrementalEncoder, incrementaldecoder = IncrementalDecoder, streamreader = StreamReader, streamwriter = StreamWriter)