add gzip, bzip2
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167
src/cmd/bzip2/CHANGES
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167
src/cmd/bzip2/CHANGES
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0.9.0
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~~~~~
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First version.
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0.9.0a
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~~~~~~
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Removed 'ranlib' from Makefile, since most modern Unix-es
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don't need it, or even know about it.
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0.9.0b
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~~~~~~
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Fixed a problem with error reporting in bzip2.c. This does not effect
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the library in any way. Problem is: versions 0.9.0 and 0.9.0a (of the
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program proper) compress and decompress correctly, but give misleading
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error messages (internal panics) when an I/O error occurs, instead of
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reporting the problem correctly. This shouldn't give any data loss
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(as far as I can see), but is confusing.
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Made the inline declarations disappear for non-GCC compilers.
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0.9.0c
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~~~~~~
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Fixed some problems in the library pertaining to some boundary cases.
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This makes the library behave more correctly in those situations. The
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fixes apply only to features (calls and parameters) not used by
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bzip2.c, so the non-fixedness of them in previous versions has no
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effect on reliability of bzip2.c.
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In bzlib.c:
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* made zero-length BZ_FLUSH work correctly in bzCompress().
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* fixed bzWrite/bzRead to ignore zero-length requests.
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* fixed bzread to correctly handle read requests after EOF.
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* wrong parameter order in call to bzDecompressInit in
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bzBuffToBuffDecompress. Fixed.
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In compress.c:
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* changed setting of nGroups in sendMTFValues() so as to
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do a bit better on small files. This _does_ effect
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bzip2.c.
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0.9.5a
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~~~~~~
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Major change: add a fallback sorting algorithm (blocksort.c)
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to give reasonable behaviour even for very repetitive inputs.
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Nuked --repetitive-best and --repetitive-fast since they are
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no longer useful.
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Minor changes: mostly a whole bunch of small changes/
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bugfixes in the driver (bzip2.c). Changes pertaining to the
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user interface are:
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allow decompression of symlink'd files to stdout
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decompress/test files even without .bz2 extension
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give more accurate error messages for I/O errors
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when compressing/decompressing to stdout, don't catch control-C
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read flags from BZIP2 and BZIP environment variables
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decline to break hard links to a file unless forced with -f
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allow -c flag even with no filenames
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preserve file ownerships as far as possible
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make -s -1 give the expected block size (100k)
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add a flag -q --quiet to suppress nonessential warnings
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stop decoding flags after --, so files beginning in - can be handled
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resolved inconsistent naming: bzcat or bz2cat ?
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bzip2 --help now returns 0
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Programming-level changes are:
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fixed syntax error in GET_LL4 for Borland C++ 5.02
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let bzBuffToBuffDecompress return BZ_DATA_ERROR{_MAGIC}
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fix overshoot of mode-string end in bzopen_or_bzdopen
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wrapped bzlib.h in #ifdef __cplusplus ... extern "C" { ... }
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close file handles under all error conditions
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added minor mods so it compiles with DJGPP out of the box
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fixed Makefile so it doesn't give problems with BSD make
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fix uninitialised memory reads in dlltest.c
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0.9.5b
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~~~~~~
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Open stdin/stdout in binary mode for DJGPP.
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0.9.5c
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~~~~~~
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Changed BZ_N_OVERSHOOT to be ... + 2 instead of ... + 1. The + 1
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version could cause the sorted order to be wrong in some extremely
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obscure cases. Also changed setting of quadrant in blocksort.c.
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0.9.5d
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~~~~~~
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The only functional change is to make bzlibVersion() in the library
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return the correct string. This has no effect whatsoever on the
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functioning of the bzip2 program or library. Added a couple of casts
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so the library compiles without warnings at level 3 in MS Visual
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Studio 6.0. Included a Y2K statement in the file Y2K_INFO. All other
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changes are minor documentation changes.
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1.0
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~~~
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Several minor bugfixes and enhancements:
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* Large file support. The library uses 64-bit counters to
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count the volume of data passing through it. bzip2.c
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is now compiled with -D_FILE_OFFSET_BITS=64 to get large
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file support from the C library. -v correctly prints out
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file sizes greater than 4 gigabytes. All these changes have
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been made without assuming a 64-bit platform or a C compiler
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which supports 64-bit ints, so, except for the C library
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aspect, they are fully portable.
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* Decompression robustness. The library/program should be
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robust to any corruption of compressed data, detecting and
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handling _all_ corruption, instead of merely relying on
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the CRCs. What this means is that the program should
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never crash, given corrupted data, and the library should
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always return BZ_DATA_ERROR.
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* Fixed an obscure race-condition bug only ever observed on
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Solaris, in which, if you were very unlucky and issued
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control-C at exactly the wrong time, both input and output
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files would be deleted.
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* Don't run out of file handles on test/decompression when
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large numbers of files have invalid magic numbers.
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* Avoid library namespace pollution. Prefix all exported
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symbols with BZ2_.
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* Minor sorting enhancements from my DCC2000 paper.
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* Advance the version number to 1.0, so as to counteract the
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(false-in-this-case) impression some people have that programs
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with version numbers less than 1.0 are in someway, experimental,
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pre-release versions.
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* Create an initial Makefile-libbz2_so to build a shared library.
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Yes, I know I should really use libtool et al ...
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* Make the program exit with 2 instead of 0 when decompression
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fails due to a bad magic number (ie, an invalid bzip2 header).
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Also exit with 1 (as the manual claims :-) whenever a diagnostic
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message would have been printed AND the corresponding operation
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is aborted, for example
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bzip2: Output file xx already exists.
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When a diagnostic message is printed but the operation is not
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aborted, for example
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bzip2: Can't guess original name for wurble -- using wurble.out
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then the exit value 0 is returned, unless some other problem is
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also detected.
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I think it corresponds more closely to what the manual claims now.
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1.0.1
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~~~~~
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* Modified dlltest.c so it uses the new BZ2_ naming scheme.
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* Modified makefile-msc to fix minor build probs on Win2k.
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* Updated README.COMPILATION.PROBLEMS.
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There are no functionality changes or bug fixes relative to version
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1.0.0. This is just a documentation update + a fix for minor Win32
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build problems. For almost everyone, upgrading from 1.0.0 to 1.0.1 is
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utterly pointless. Don't bother.
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