Hi,
I do not know if you are interrested, but I already did
a lot work on zlib/gzlib in Gujin:
http://gujin.sourceforge.net/
There is a near complete rewrite of zlib, even removing the
32Kb window stuff. Unlike zlib, it is only licenced as GPL, and only
tested on i386, in fact 32 bit processors. An unusual CRC32 function
is also available, optimised to i386 instructions but without a table
to reduce the data cache page misses and code size.
Have a look at gzcopy.c:
gzcopy -t infile.gz -> test the content of the file (-t0 for quite).
The kind of testing done is in Makefile:
testgzlib: gzcopy
find /mnt/cdrom/ -name "*.tgz" -o -name "*.gz" \
-exec ./gzcopy -t {} \; 2>&1 | tee log
I did it on multi CDROMs collection like ftp.cdrom.com , it checks
all files CRC32 - the only failure were unreadable files on the device
and file not compressed by GZIP (GZIP can decompress .Z and .ZIP files)
even if someone changed their name to *.gz
My aim there was code size reduction (4-5 Kbytes of code total).
It does compile and work with GCC aliasing optimisation.
Cheers,
Etienne.
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This archive was generated by hypermail 2b29 : Mon Jul 07 2003 - 22:00:15 EST