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