126 lines
5.1 KiB
Plaintext
126 lines
5.1 KiB
Plaintext
3.5 Fri May 1 02:28:42 CEST 2009
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- lzf_compress did sometimes write one octet past the given output
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buffer (analyzed and nice testcase by Salvatore Sanfilippo).
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3.4 Tue Sep 2 06:45:00 CEST 2008
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- the fix from 3.3 introduced a compression bug, which is fixed in
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this release (which explains the mysterious prerelease...). Thanks
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once more to Clément Calmels.
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3.3 Mon Aug 25 03:17:42 CEST 2008
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- lzf_compress could access memory after the given input buffer
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when outputting back references. reported with nice testcase
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by Clément Calmels.
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3.2 Fri May 9 18:52:23 CEST 2008
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- include a workaround for failing POSIX and real-world compliance
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on 64 bit windows (microsoft claims to support POSIX, but is far
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from it). (bug found and analysed nicely by John Lilley).
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3.1 Fri Nov 30 11:33:04 CET 2007
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- IMPORTANT BUGFIX: a too long final literal run would corrupt data
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in the encoder (this was introduced in 3.0 only, earlier versions
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are safe).
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3.0 Tue Nov 13 22:13:09 CET 2007
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- switched to 2-clause bsd with "GPL v2 or any later version" option.
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- speed up compression by ~10-15% in common cases
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by some manual unrolling.
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- import some compiler tricks from JSON::XS, for further speed-ups.
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- tune hash functions depending on ULTRA_FAST or VERY_FAST settings.
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- for typical binary data (e.g. /bin/bash, memory dumps,
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canterbury corpus etc.), speed is now comparable to fastlz, but
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with better compression ratio. with ULTRA_FAST, it's typically
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3-15% faster than fastlz while still maintaining a similar ratio.
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(amd64 and core 2 duo, ymmv). thanks a lot for the competition :)
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- undo inline assembly in compressor, it is no longer helpful.
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- no changes to the decompressor.
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- use a HLOG of 16 by default now (formerly 15).
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2.1 Fri Nov 2 13:34:42 CET 2007
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- switched to a 2-clause bsd license with GPL exception.
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- get rid of memcpy.
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- tentatively use rep movsb on x86 and x86_64 (gcc only) for a
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moderate speed improvement.
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- applied patch by Kein-Hong Man to maske lzf.c compile under
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the crippled mingw32 environment.
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2.0 Fri Feb 16 23:11:18 CET 2007
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- replaced lzf demo by industrial-strength lzf utility with behaviour
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similar other compression utilities. Thanks for Stefan Traby for
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rewriting it!
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- fix state arg prototype.
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1.7 Wed Sep 27 17:29:15 CEST 2006
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- remove bogus "unlzf" patch.
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note to self: never accept well-meant patches.
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- make lzf more robust in presence of padding bytes or sudden eof.
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1.6 Fri Jul 7 17:31:26 CEST 2006
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- the lzf example utility will now uncompress if invoked
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as "unlzf" (patch by Scott Feeney).
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- add CHECK_INPUT option that adds more checks for input
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data validity.
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- help applications that do not pass in the correct length
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(such as php) by returning either EINVAL or E2BIG.
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- default HLOG size is now 15 (cpu caches have increased).
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- documentation fixes.
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1.51 Thu Apr 14 22:15:46 CEST 2005
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- incorporated C♯ implementation of both the en- and decoder,
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written by "Oren J. Maurice".
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You can find it in the cs/ subdirectory.
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- make FRST, NEXT IDX overridable if lzf_c.c is directly included
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in the code.
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1.5 Tue Mar 8 20:23:23 CET 2005
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- incorporated improvements by Adam D. Moss,
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which includes a new VERY_FAST mode which is
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a bit slower than ULTRA_FAST but much better,
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and enabled it as default.
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1.401 Thu Mar 3 18:00:52 CET 2005
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- use cstring in c++, not string.h.
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- change of contact address.
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1.4 Wed Dec 15 08:08:49 CET 2004
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- very very slight tuning of the hashing function.
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1.3 Thu Mar 25 15:41:17 CET 2004
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- changed license of lzf core code to explicitly allow
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relicensing under the GPLv2.
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- added VPATH support as suggested by Björn Eriksson.
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1.2 Mon Dec 29 13:47:28 CET 2003
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- avoid spurious memory accesses after the to-be-compressed
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memory region. originally reported by Michal Zalewski.
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- flip LZF_STACK_ARG meaning (to be correct).
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1.1 Tue Dec 23 05:48:32 CET 2003
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- removed #warn directive, it's not worth the hassle.
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- add LZF_STACK_ARG and AVOID_ERRNO configurations
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for embedded systems.
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- make it compile cleanly as c++.
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- some small documentation and code fixes.
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1.0 Sun Nov 17 12:37:37 CET 2002
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- slightly better compression ratio, almost unmeasurably
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slower.
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- some documentation fixes.
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0.4 Thu Jun 13 14:11:10 CEST 2002
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- typoe fix.
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- lzf demo program now properly decompresses small files.
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- fix another 64 bit issue, found by Laurent Deniel.
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0.3 Tue Jan 16 13:21:14 CET 2001
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- fix silly beginners 32/64 bit mistake.
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0.2 Thu Jan 4 05:56:42 CET 2001
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- now totally independent of autoconfig, for
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easy inclusion into other programs.
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- much better fine-tuning, faster and better than 0.1.
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0.1 2000
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- initial release.
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