[Patches] [ python-Patches-1435422 ] Add copy() method to zlib's compress and decompress objects

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Patches item #1435422, was opened at 2006-02-20 15:17
Message generated for change (Comment added) made by catlee
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Category: Modules
Group: Python 2.5
Status: Open
Resolution: None
Priority: 5
Submitted By: Chris AtLee (catlee)
Assigned to: Nobody/Anonymous (nobody)
Summary: Add copy() method to zlib's compress and decompress objects

Initial Comment:
The attached patch adds a copy() method to zlib's
compressobj and decompressobj.  Copying a
(de)compression object allows a developer to store the
state of the (de)compressor at a certain point of the
input stream in order to more efficiently compress data
sharing some identical header, or to more efficiently
seek inside compressed data.

Doc/lib/libzlib.tex is updated with descriptions for
the new methods.

Lib/test/test_zlib.py is updated to test the new
functionality.

The patch is against revision 42524 in
http://svn.python.org/projects/python/trunk


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>Comment By: Chris AtLee (catlee)
Date: 2006-03-27 13:52

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New patch attached with the mentioned changes made.

I noticed that PyZlib_unflush() takes an argument, but that
its use is not documented.  Should the docs be updated to
explain what that argument is for?

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Comment By: Neal Norwitz (nnorwitz)
Date: 2006-03-24 01:02

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You need to check the return result of newcompobject(). 
This would crash if it returns NULL.

You also need to change METH_VARARGS to METH_NOARGS since
these methods don't take any arguments.

The doc should contain \versionadded{2.5} before the end
markers for new methods.

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