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