[Python-Dev] zlib module doesn't build (original) (raw)

[Python-Dev] zlib module doesn't build - inflateCopy() not found

Guido van Rossum guido at python.org
Sun May 21 17:34:16 CEST 2006

Then options 2 and 3 are both fine.

Not compiling at all is not, so if nobody has time to implement 2 or 3, we'll have to do 4.

--Guido

On 5/21/06, "Martin v. Löwis" <martin at v.loewis.de> wrote:

Guido van Rossum wrote: > What was the purpose of the patch in the first place?

I don't fully understand it. I guess the objective of the patch was to expose the feature of the underlying library. The SF submission then gives the rationale for that feature as """ 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. """ The submitter first posted this message to c.l.p: http://groups.google.com/group/comp.lang.python/msg/13f8ce4057162ad5 Apparently, one application is to take a snapshot of a gzip file that is being created, then add to it, and if that fails (e.g. because the size of the CD would be exceeded), truncate it to back to the snapshot (and then close the zlib stream). Regards, Martin

-- --Guido van Rossum (home page: http://www.python.org/~guido/)

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