[ViewVC] Contents of: cvs/liblzf/Changes

        - switched to GPL v2 or any later version.
        - speed up compression by ~10-15% in common cases
          by some manual unrolling.
        - import some compiler tricks from JSON::XS.
        - tune hash functions depending on ULTRA_FAST or VERY_FAST settings.
        - for typical binary data (e.g. /bin/bash, memory dumps,
          canterbury corpus etc.), speed is now comparable to fastlz, but
          with better compression ratio. with ULTRA_FAST, it's typically
          3-8% faster than fastlz while still maintaining a similar ratio.
          (amd64, ymmv). thanks a lot for the competition :)
        - undo inline assembly, it is no longer helpful.

2.1  Fri Nov  2 13:34:42 CET 2007
        - switched to a 2-clause bsd license with GPL exception.
        - get rid of memcpy.
        - tentatively use rep movsb on x86 and x86_64 (gcc only) for a
          moderate speed improvement.
        - applied patch by Kein-Hong Man to maske lzf.c compile under
          the crippled mingw32 environment.

2.0  Fri Feb 16 23:11:18 CET 2007
        - replaced lzf demo by industrial-strength lzf utility with behaviour
          similar other compression utilities. Thanks for Stefan Traby for
          rewriting it!
        - fix state arg prototype.

1.7  Wed Sep 27 17:29:15 CEST 2006
        - remove bogus "unlzf" patch.
          note to self: never accept well-meant patches.
        - make lzf more robust in presence of padding bytes or sudden eof.

1.6  Fri Jul  7 17:31:26 CEST 2006
        - the lzf example utility will now uncompress if invoked
          as "unlzf" (patch by Scott Feeney).
        - add CHECK_INPUT option that adds more checks for input
          data validity.
        - help applications that do not pass in the correct length
          (such as php) by returning either EINVAL or E2BIG.
        - default HLOG size is now 15 (cpu caches have increased).
        - documentation fixes.

1.51 Thu Apr 14 22:15:46 CEST 2005
        - incorporated C♯ implementation of both the en- and decoder,
          written by "Oren J. Maurice <oymaurice@hazorea.org.il>".
          You can find it in the cs/ subdirectory.
        - make FRST, NEXT IDX overridable if lzf_c.c is directly included
          in the code.

1.5  Tue Mar  8 20:23:23 CET 2005
        - incorporated improvements by Adam D. Moss,
          which includes a new VERY_FAST mode which is
          a bit slower than ULTRA_FAST but much better,
          and enabled it as default.

1.401 Thu Mar  3 18:00:52 CET 2005
        - use cstring in c++, not string.h.
        - change of contact address.

1.4  Wed Dec 15 08:08:49 CET 2004
        - very very slight tuning of the hashing function.

1.3  Thu Mar 25 15:41:17 CET 2004
        - changed license of lzf core code to explicitly allow
          relicensing under the GPLv2.
        - added VPATH support as suggested by Björn Eriksson.

1.2  Mon Dec 29 13:47:28 CET 2003
        - avoid spurious memory accesses after the to-be-compressed
          memory region. originally reported by Michal Zalewski.
        - flip LZF_STACK_ARG meaning (to be correct).

1.1  Tue Dec 23 05:48:32 CET 2003
        - removed #warn directive, it's not worth the hassle.
        - add LZF_STACK_ARG and AVOID_ERRNO configurations
          for embedded systems.
        - make it compile cleanly as c++.
        - some small documentation and code fixes.

1.0  Sun Nov 17 12:37:37 CET 2002
        - slightly better compression ratio, almost unmeasurably
          slower.
        - some documentation fixes.

0.4  Thu Jun 13 14:11:10 CEST 2002
        - typoe fix.
        - lzf demo program now properly decompresses small files.
        - fix another 64 bit issue, found by Laurent Deniel.

0.3  Tue Jan 16 13:21:14 CET 2001
        - fix silly beginners 32/64 bit mistake.

0.2  Thu Jan  4 05:56:42 CET 2001
        - now totally independent of autoconfig, for
          easy inclusion into other programs.
        - much better fine-tuning, faster and better than 0.1.

0.1  2000
        - initial release.
Revision:	1.33
Committed:	Tue Nov 13 10:41:52 2007 UTC (16 years, 6 months ago) by root
Branch:	MAIN
Changes since 1.32:	+10 -0 lines
Log Message:	* empty log message *
#	Content
1	- switched to GPL v2 or any later version.
2	- speed up compression by ~10-15% in common cases
3	by some manual unrolling.
4	- import some compiler tricks from JSON::XS.
5	- tune hash functions depending on ULTRA_FAST or VERY_FAST settings.
6	- for typical binary data (e.g. /bin/bash, memory dumps,
7	canterbury corpus etc.), speed is now comparable to fastlz, but
8	with better compression ratio. with ULTRA_FAST, it's typically
9	3-8% faster than fastlz while still maintaining a similar ratio.
10	(amd64, ymmv). thanks a lot for the competition :)
11	- undo inline assembly, it is no longer helpful.
12
13	2.1 Fri Nov 2 13:34:42 CET 2007
14	- switched to a 2-clause bsd license with GPL exception.
15	- get rid of memcpy.
16	- tentatively use rep movsb on x86 and x86_64 (gcc only) for a
17	moderate speed improvement.
18	- applied patch by Kein-Hong Man to maske lzf.c compile under
19	the crippled mingw32 environment.
20
21	2.0 Fri Feb 16 23:11:18 CET 2007
22	- replaced lzf demo by industrial-strength lzf utility with behaviour
23	similar other compression utilities. Thanks for Stefan Traby for
24	rewriting it!
25	- fix state arg prototype.
26
27	1.7 Wed Sep 27 17:29:15 CEST 2006
28	- remove bogus "unlzf" patch.
29	note to self: never accept well-meant patches.
30	- make lzf more robust in presence of padding bytes or sudden eof.
31
32	1.6 Fri Jul 7 17:31:26 CEST 2006
33	- the lzf example utility will now uncompress if invoked
34	as "unlzf" (patch by Scott Feeney).
35	- add CHECK_INPUT option that adds more checks for input
36	data validity.
37	- help applications that do not pass in the correct length
38	(such as php) by returning either EINVAL or E2BIG.
39	- default HLOG size is now 15 (cpu caches have increased).
40	- documentation fixes.
41
42	1.51 Thu Apr 14 22:15:46 CEST 2005
43	- incorporated C♯ implementation of both the en- and decoder,
44	written by "Oren J. Maurice <oymaurice@hazorea.org.il>".
45	You can find it in the cs/ subdirectory.
46	- make FRST, NEXT IDX overridable if lzf_c.c is directly included
47	in the code.
48
49	1.5 Tue Mar 8 20:23:23 CET 2005
50	- incorporated improvements by Adam D. Moss,
51	which includes a new VERY_FAST mode which is
52	a bit slower than ULTRA_FAST but much better,
53	and enabled it as default.
54
55	1.401 Thu Mar 3 18:00:52 CET 2005
56	- use cstring in c++, not string.h.
57	- change of contact address.
58
59	1.4 Wed Dec 15 08:08:49 CET 2004
60	- very very slight tuning of the hashing function.
61
62	1.3 Thu Mar 25 15:41:17 CET 2004
63	- changed license of lzf core code to explicitly allow
64	relicensing under the GPLv2.
65	- added VPATH support as suggested by Björn Eriksson.
66
67	1.2 Mon Dec 29 13:47:28 CET 2003
68	- avoid spurious memory accesses after the to-be-compressed
69	memory region. originally reported by Michal Zalewski.
70	- flip LZF_STACK_ARG meaning (to be correct).
71
72	1.1 Tue Dec 23 05:48:32 CET 2003
73	- removed #warn directive, it's not worth the hassle.
74	- add LZF_STACK_ARG and AVOID_ERRNO configurations
75	for embedded systems.
76	- make it compile cleanly as c++.
77	- some small documentation and code fixes.
78
79	1.0 Sun Nov 17 12:37:37 CET 2002
80	- slightly better compression ratio, almost unmeasurably
81	slower.
82	- some documentation fixes.
83
84	0.4 Thu Jun 13 14:11:10 CEST 2002
85	- typoe fix.
86	- lzf demo program now properly decompresses small files.
87	- fix another 64 bit issue, found by Laurent Deniel.
88
89	0.3 Tue Jan 16 13:21:14 CET 2001
90	- fix silly beginners 32/64 bit mistake.
91
92	0.2 Thu Jan 4 05:56:42 CET 2001
93	- now totally independent of autoconfig, for
94	easy inclusion into other programs.
95	- much better fine-tuning, faster and better than 0.1.
96
97	0.1 2000
98	- initial release.