CHANGES revision 78556 
1
2
30.9.0
4~~~~~
5First version.
6
7
80.9.0a
9~~~~~~
10Removed 'ranlib' from Makefile, since most modern Unix-es 
11don't need it, or even know about it.
12
13
140.9.0b
15~~~~~~
16Fixed a problem with error reporting in bzip2.c.  This does not effect
17the library in any way.  Problem is: versions 0.9.0 and 0.9.0a (of the
18program proper) compress and decompress correctly, but give misleading
19error messages (internal panics) when an I/O error occurs, instead of
20reporting the problem correctly.  This shouldn't give any data loss
21(as far as I can see), but is confusing.
22
23Made the inline declarations disappear for non-GCC compilers.
24
25
260.9.0c
27~~~~~~
28Fixed some problems in the library pertaining to some boundary cases.
29This makes the library behave more correctly in those situations.  The
30fixes apply only to features (calls and parameters) not used by
31bzip2.c, so the non-fixedness of them in previous versions has no
32effect on reliability of bzip2.c.
33
34In bzlib.c:
35   * made zero-length BZ_FLUSH work correctly in bzCompress().
36   * fixed bzWrite/bzRead to ignore zero-length requests.
37   * fixed bzread to correctly handle read requests after EOF.
38   * wrong parameter order in call to bzDecompressInit in
39     bzBuffToBuffDecompress.  Fixed.
40
41In compress.c:
42   * changed setting of nGroups in sendMTFValues() so as to 
43     do a bit better on small files.  This _does_ effect
44     bzip2.c.
45
46
470.9.5a
48~~~~~~
49Major change: add a fallback sorting algorithm (blocksort.c)
50to give reasonable behaviour even for very repetitive inputs.
51Nuked --repetitive-best and --repetitive-fast since they are
52no longer useful.
53
54Minor changes: mostly a whole bunch of small changes/
55bugfixes in the driver (bzip2.c).  Changes pertaining to the
56user interface are:
57
58   allow decompression of symlink'd files to stdout
59   decompress/test files even without .bz2 extension
60   give more accurate error messages for I/O errors
61   when compressing/decompressing to stdout, don't catch control-C
62   read flags from BZIP2 and BZIP environment variables
63   decline to break hard links to a file unless forced with -f
64   allow -c flag even with no filenames
65   preserve file ownerships as far as possible
66   make -s -1 give the expected block size (100k)
67   add a flag -q --quiet to suppress nonessential warnings
68   stop decoding flags after --, so files beginning in - can be handled
69   resolved inconsistent naming: bzcat or bz2cat ?
70   bzip2 --help now returns 0
71
72Programming-level changes are:
73
74   fixed syntax error in GET_LL4 for Borland C++ 5.02
75   let bzBuffToBuffDecompress return BZ_DATA_ERROR{_MAGIC}
76   fix overshoot of mode-string end in bzopen_or_bzdopen
77   wrapped bzlib.h in #ifdef __cplusplus ... extern "C" { ... }
78   close file handles under all error conditions
79   added minor mods so it compiles with DJGPP out of the box
80   fixed Makefile so it doesn't give problems with BSD make
81   fix uninitialised memory reads in dlltest.c
82
830.9.5b
84~~~~~~
85Open stdin/stdout in binary mode for DJGPP.
86
870.9.5c
88~~~~~~
89Changed BZ_N_OVERSHOOT to be ... + 2 instead of ... + 1.  The + 1
90version could cause the sorted order to be wrong in some extremely
91obscure cases.  Also changed setting of quadrant in blocksort.c.
92
930.9.5d
94~~~~~~
95The only functional change is to make bzlibVersion() in the library
96return the correct string.  This has no effect whatsoever on the
97functioning of the bzip2 program or library.  Added a couple of casts
98so the library compiles without warnings at level 3 in MS Visual
99Studio 6.0.  Included a Y2K statement in the file Y2K_INFO.  All other
100changes are minor documentation changes.
101
1021.0
103~~~
104Several minor bugfixes and enhancements:
105
106* Large file support.  The library uses 64-bit counters to
107  count the volume of data passing through it.  bzip2.c 
108  is now compiled with -D_FILE_OFFSET_BITS=64 to get large
109  file support from the C library.  -v correctly prints out
110  file sizes greater than 4 gigabytes.  All these changes have
111  been made without assuming a 64-bit platform or a C compiler
112  which supports 64-bit ints, so, except for the C library
113  aspect, they are fully portable.
114
115* Decompression robustness.  The library/program should be
116  robust to any corruption of compressed data, detecting and
117  handling _all_ corruption, instead of merely relying on
118  the CRCs.  What this means is that the program should 
119  never crash, given corrupted data, and the library should
120  always return BZ_DATA_ERROR.
121
122* Fixed an obscure race-condition bug only ever observed on
123  Solaris, in which, if you were very unlucky and issued
124  control-C at exactly the wrong time, both input and output
125  files would be deleted.
126
127* Don't run out of file handles on test/decompression when
128  large numbers of files have invalid magic numbers.
129
130* Avoid library namespace pollution.  Prefix all exported 
131  symbols with BZ2_.
132
133* Minor sorting enhancements from my DCC2000 paper.
134
135* Advance the version number to 1.0, so as to counteract the
136  (false-in-this-case) impression some people have that programs 
137  with version numbers less than 1.0 are in someway, experimental,
138  pre-release versions.
139
140* Create an initial Makefile-libbz2_so to build a shared library.
141  Yes, I know I should really use libtool et al ...
142
143* Make the program exit with 2 instead of 0 when decompression
144  fails due to a bad magic number (ie, an invalid bzip2 header).
145  Also exit with 1 (as the manual claims :-) whenever a diagnostic
146  message would have been printed AND the corresponding operation 
147  is aborted, for example
148     bzip2: Output file xx already exists.
149  When a diagnostic message is printed but the operation is not 
150  aborted, for example
151     bzip2: Can't guess original name for wurble -- using wurble.out
152  then the exit value 0 is returned, unless some other problem is
153  also detected.
154
155  I think it corresponds more closely to what the manual claims now.
156
157
1581.0.1
159~~~~~
160* Modified dlltest.c so it uses the new BZ2_ naming scheme.
161* Modified makefile-msc to fix minor build probs on Win2k.
162* Updated README.COMPILATION.PROBLEMS.
163
164There are no functionality changes or bug fixes relative to version
1651.0.0.  This is just a documentation update + a fix for minor Win32
166build problems.  For almost everyone, upgrading from 1.0.0 to 1.0.1 is
167utterly pointless.  Don't bother.
168