1 files changed, 61 insertions, 0 deletions
diff --git a/Lib/encodings/zlib_codec.py b/Lib/encodings/zlib_codec.py
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+++ b/Lib/encodings/zlib_codec.py
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+""" 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):
+
+    encode = zlib_encode
+    decode = zlib_decode
+
+class StreamWriter(Codec,codecs.StreamWriter):
+    pass
+        
+class StreamReader(Codec,codecs.StreamReader):
+    pass
+
+### encodings module API
+
+def getregentry():
+
+    return (zlib_encode,zlib_decode,StreamReader,StreamWriter)