mirror of https://github.com/libAthena/athena.git
289 lines
12 KiB
Plaintext
289 lines
12 KiB
Plaintext
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============================================================================
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User visible changes for LZO -- a real-time data compression library
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============================================================================
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Changes in 2.09 (04 Feb 2015)
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* Work around gcc bug #64516 that could affect architectures like
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armv4, armv5 and sparc.
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Changes in 2.08 (29 Jun 2014)
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* Updated the Autoconf scripts to fix some reported build problems.
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* Added CMake build support.
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* Fixed lzo_init() on big-endian architectures like Sparc.
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Changes in 2.07 (25 Jun 2014)
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* Fixed a potential integer overflow condition in the "safe" decompressor
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variants which could result in a possible buffer overrun when
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processing maliciously crafted compressed input data.
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Fortunately this issue only affects 32-bit systems and also can only happen
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if you use uncommonly huge buffer sizes where you have to decompress more
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than 16 MiB (> 2^24 bytes) untrusted compressed bytes within a single
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function call, so the practical implications are limited.
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POTENTIAL SECURITY ISSUE. CVE-2014-4607.
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* Removed support for ancient configurations like 16-bit "huge" pointers -
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LZO now requires a flat 32-bit or 64-bit memory model.
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* Assorted cleanups.
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Changes in 2.06 (12 Aug 2011)
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* Some minor optimizations for big-endian architectures.
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* Fixed overly strict malloc() misalignment check in examples.
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Changes in 2.05 (23 Apr 2011)
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* Converted the configure system to non-recursive Automake.
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* Applied some overdue speed optimizations for modern x86/x64 architectures
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and current compilers like gcc 4.6 and MSVC 2010.
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Changes in 2.04 (31 Oct 2010)
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* Fixed a gcc-4.5 aliasing issue in lzo_init().
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* Updated the configure system.
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* Assorted cleanups.
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Changes in 2.03 (30 Apr 2008)
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* Updated the ELF assembler sources to mark the stack as non-executable.
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* Fixed a HP-UX 11 build issue with Itanium in ILP32 mode.
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* Updated the configure system.
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Changes in 2.02 (17 Oct 2005)
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* Updated the build and Autoconf scripts to fix some reported
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compilation problems.
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Changes in 2.01 (27 Jun 2005)
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* Changed the configure system to install the LZO library under the
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name "liblzo2" so that parallel installation with LZO v1 is possible.
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* Improved auto-configuration in miniLZO for some embedded targets like
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Blackfin and H8/300 processors.
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Changes in 2.00 (30 May 2005)
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[Library interface changes]
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* The 'lzo_uint' typedef has been changed to match 'size_t', which means
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it now is 64 bits on most 64-bit architectures. 32-bit machines
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are not affected by this change.
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* The formula for maximum expansion of incompressible data has changed.
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See doc/LZO.FAQ. This is needed for some upcoming speed improvements,
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and also for compatibility with our commercial LZO Professional product.
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* The progress indicator callback interface has been revamped.
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* All public header files now get installed into a "lzo" subdirectory, so
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your applications should use #include <lzo/lzoXXX.h>.
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* A number of (internal) macros have been renamed. See LZO_CFG_COMPAT
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in <lzo/lzoconf.h> if your code depends on these.
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[Speed]
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* Small overall speedup by exploiting features like branch prediction
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hints and explicit inline control present in modern C/C++ compilers.
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* Significant speedup for 64-bit architectures like AMD64.
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[Portability]
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* LZO now fully supports the LLP64 programming model.
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* LZO now fully supports the ILP64 and SILP64 programming models which
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are used on some supercomputing architectures.
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* Full Win64 support for AMD64 (aka x64) and IA64 (Itanium).
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* Full 16-bit support for ancient DOS 286 protected mode, OS/2 1.x
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and Windows 3.x.
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* The LZO library now compiles and works on completely freestanding or
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embedded systems as long as you have <limits.h> and <stddef.h> header
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files. See the B/generic/build_freestanding.sh build script.
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[Misc]
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* The i386 assembler versions of the decompressors are now automatically
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built and installed. See also asm/i386/00README.TXT.
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* Added include file <lzo/lzo_asm.h> that provides prototypes for all
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assembler functions.
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* Under MacOS X, the configure script now will use the '-no-cpp-precomp'
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compiler option in order to work around bugs in some versions of
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Apple's native "smart" preprocessor.
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* Worked around a preprocessor bug that is present in all compilers which
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are based on the lcc compiler kit.
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* Added simple B/generic/build.sh build script family.
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* Added lots of new build scripts for various DOS/Windows compilers.
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[Upgrade instructions from LZO v1 to LZO v2]
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* On 64-bit architectures, revisit all uses of lzo_uint.
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* Adapt for the maximum expansion change of incompressible data.
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* If you use the progress callback then adapt for the new interface.
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* Use #include <lzo/lzoXXX.h> or adjust your include path.
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* Check your code for use of deprecated macros. Add a
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#define LZO_CFG_COMPAT if necessary.
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* Other than that LZO v2 should be fully source-compatible with LZO v1.
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Of course, the compressed data is fully compatible as well.
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* Re-compile and re-link your application.
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* Enjoy the improvements!
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----------------------------------------------------------------------------
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Changes in 1.08 (12 Jul 2002)
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* Much better support for cross compiling.
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* Straighten out ANSI-conforming compiler checks.
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* Avoid harmless compiler warnings reported by -Wcast-align.
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* Fixed some sign extension problems on rather exotic machines where
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sizeof(size_t) < sizeof(ptrdiff_t) and sizeof(lzo_uint) == sizeof(size_t)
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* Updated the configure system to use the latest Autoconf, Automake
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and Libtool versions.
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Changes in 1.07 (18 Oct 2000)
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* Default to '--disable-shared' (I'm getting tired of Libtool's
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shared library build problems, this time AIX was the culprit).
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* Avoid some harmless compiler warnings.
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Changes in 1.06 (29 Nov 1999)
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* Updated the configure system to use Autoconf 2.13, Automake 1.4 and
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Libtool 1.3.3. This should hopefully fix the shared-library build
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problems that were reported on some machines.
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* Enhanced example programs a little bit.
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Changes in 1.05 (14 Apr 1998)
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* Just a one-line change in the configure script to workaround
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a HPUX and IRIX build problem.
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Changes in 1.04 (15 Mar 1998)
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* Worked around a bug in the cpp preprocessor under HPUX 10.20.
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* Adapted for Automake 1.2f and Libtool 1.1.
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Changes in 1.03 (18 Jan 1998)
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* minor compression ratio improvement
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* extended example program to show how to do overlapping compression
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* assembler changes, added support for the nasm assembler
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* better support for cross compiling
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* some cleanups
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Changes in 1.02 (07 Dec 1997)
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* improved LZO1X-999 and LZO1Y-999 compression ratio a little bit again
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* introduced compression levels for LZO1X-999 and LZO1Y-999
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* added support for preset dictionaries
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* implemented LZO1X-1(12): needs 16 KiB for compression
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* new algorithm LZO1Z: this is another variant of LZO1X
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* added example program: how to use preset dictionaries
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* added example program: how to do in-place decompression
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* added a little file-packer example program
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* LZO now works cleanly under checkergcc
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* strict 16-bit memory model is working (but not officially supported)
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* shared libraries are supported on many platforms
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* adapted for Automake 1.2d and Libtool 1.0h
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Changes in 1.01 (10 Aug 1997)
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* improved LZO1X-999 and LZO1Y-999 compression ratio a little bit
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* i386+gcc: significant speedup of the C version of the LZO1, LZO1A,
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LZO1B and LZO1C decompressors
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* added example programs that show how to generate pre-compressed data
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* added Makefiles for DOS, Windows and OS/2 targets
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Changes in 1.00 (13 Jul 1997)
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* added miniLZO - can be easily included in your project
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* improved documentation, added LZO.FAQ
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* added build scripts for many systems where Autoconf is not available:
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Windows 3.1 (LIB+DLL), Windows 95/NT (LIB+DLL), DOS (16+32 bit), OS/2
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* adapted for Automake 1.2 and Libtool 1.0
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Changes in 0.90 (27 Jun 1997): never released
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* LZO now uses GNU Automake 1.0 - lots of configuration changes
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* added LZO1X-1(11): this version needs only 8 KiB for compression
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* implemented LZO1Y-1
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* added i386 assembler decompressors for MASM/TASM/WASM
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* the name of some assembler functions changed
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* the numeric value of some error codes changed
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* portability fixes
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Changes in 0.29 (04 May 1997)
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* Linux ELF shared library support
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* workaround for gcc 2.7.2 optimizer bug under AIX
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* added lzo_crc32() checksum
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Changes in 0.28 (22 Feb 1997)
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* new algorithm LZO1Y: LZO1Y-999 and LZO1Y decompressor
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* added lzo1x_optimize() and lzo1y_optimize()
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* minor speedup in assembler decompressors (i386+gcc)
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* ltest.c rewritten
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Changes in 0.27 (19 Jan 1997)
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* fixed a bug in LZO1B-999 and LZO1C-999 that could produce
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invalid compressed data in very rare cases
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Changes in 0.26 (18 Jan 1997): never released
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* implemented LZO1B-999
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* renamed LZO1D to LZO2A (also updated all docs)
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* some cleanups
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Changes in 0.25 (28 Dec 1996): never released
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* some portability fixes (LZO now works on my old Atari ST :-)
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* adapted for Autoconf 2.12
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Changes in 0.24 (30 Nov 1996): never released
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* improved performance of LZO1X assembler decompressor on a Pentium (i386+gcc)
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Changes in 0.23 (23 Nov 1996)
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* added LZO1C, LZO1F and LZO1X decompressors in assembler (i386+gcc)
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* added corresponding LZO_PUBLIC to all LZO_EXTERN functions
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* added support for Microsoft C 7.0 (16-bit DOS)
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* introduced lzo_uint32. This could prove useful for a strict 16-bit
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version that doesn't use 'huge' pointers.
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* all algorithms use incremental hashing now
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* some cleanups and portability fixes
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Changes in 0.22 (19 Sep 1996)
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* LZO1X: minor decompressor speedup, added some checks in safe decompressor
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* Autoconf: added detection of gcc strength-reduction bug
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* Makefile changes
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Changes in 0.21 (08 Sep 1996)
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* LZO now uses GNU Autoconf 2.10 - lots of configuration changes
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* a few cosmetical changes
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Changes in 0.20 (11 Aug 1996)
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* new algorithm LZO1X: LZO1X-1, LZO1X-999 and LZO1X decompressor
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* significantly speeded up LZO1B, LZO1C and LZO1F decompressors
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on CPUs which allow unaligned memory access (e.g. Intel i386)
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* greatly speeded up LZO2A-999 compressor at the cost of some memory
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* some cleanups, portability fixes and minor speedups
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Changes in 0.16 (22 Jul 1996)
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* speeded up LZO1F decompressor a little bit
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* improved LZO1F-999 compression ratio
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Changes in 0.15 (10 Jul 1996)
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* new algorithm LZO1F: LZO1F-1, LZO1F-999 and LZO1F decompressor
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* improved LZO2A-999 compression ratio
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* removed LZO1E as it is dominated by LZO1F
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Changes in 0.14 (06 Jul 1996): never released
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* experimental algorithms: LZO1E and LZO1F
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* added LZO_EXTERN to all prototypes. Useful when building a DLL.
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* improved LZO1C-999 and LZO2A-999 compression ratio a little bit
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* fixed progress indicator callback (it was called only once)
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Changes in 0.13 (20 Jun 1996)
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* some speed improvements in LZO1C-999 and LZO2A-999
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Changes in 0.12 (18 Jun 1996): never released
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* added LZO1C-999, a slow but nearly optimal compressor
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intended for generating pre-compressed data
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* added tests for lookbehind-overrun in all safe decompressors
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* source tree completely rearranged, some filenames changed
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* extensions changed: a .ch file is a C source code that is included
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for reasons of code sharing
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* new algorithm LZO2A: LZO2A-999 and LZO2A decompressor. There is
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no fast compressor yet.
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* some cleanups
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Changes in 0.11 (29 May 1996)
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* source tree rearranged
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* LZO now compiles fine as a C++ library (interface still has C linkage)
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* improved overall compression ratio a little bit
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* LZO1B-99/LZO1C-99 now search for longer matches
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* incremental hash is working, it's a little bit faster
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* Makefile changed
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* added lzo_uint and lzo_sizeof in some places
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* split LZO1B compressor into even more include-files
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Changes in 0.10 (20 May 1996): first public release of the LZO library
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* includes LZO1, LZO1A, LZO1B and LZO1C algorithms
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(compression levels 1-9 and 99)
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14 Mar 1996:
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* public release of the LZO1A algorithm
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04 Mar 1996:
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* public release of the LZO1 algorithm
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