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/StormLib/stormlib/bzip2/CHANGES

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  1 ------------------------------------------------------------------
  2 This file is part of bzip2/libbzip2, a program and library for
  3 lossless, block-sorting data compression.
  4
  5 bzip2/libbzip2 version 1.0.5 of 10 December 2007
  6 Copyright (C) 1996-2007 Julian Seward <jseward@bzip.org>
  7
  8 Please read the WARNING, DISCLAIMER and PATENTS sections in the 
  9 README file.
 10
 11 This program is released under the terms of the license contained
 12 in the file LICENSE.
 13 ------------------------------------------------------------------
 14
 15
 160.9.0
 17~~~~~
 18First version.
 19
 20
 210.9.0a
 22~~~~~~
 23Removed 'ranlib' from Makefile, since most modern Unix-es 
 24don't need it, or even know about it.
 25
 26
 270.9.0b
 28~~~~~~
 29Fixed a problem with error reporting in bzip2.c.  This does not effect
 30the library in any way.  Problem is: versions 0.9.0 and 0.9.0a (of the
 31program proper) compress and decompress correctly, but give misleading
 32error messages (internal panics) when an I/O error occurs, instead of
 33reporting the problem correctly.  This shouldn't give any data loss
 34(as far as I can see), but is confusing.
 35
 36Made the inline declarations disappear for non-GCC compilers.
 37
 38
 390.9.0c
 40~~~~~~
 41Fixed some problems in the library pertaining to some boundary cases.
 42This makes the library behave more correctly in those situations.  The
 43fixes apply only to features (calls and parameters) not used by
 44bzip2.c, so the non-fixedness of them in previous versions has no
 45effect on reliability of bzip2.c.
 46
 47In bzlib.c:
 48   * made zero-length BZ_FLUSH work correctly in bzCompress().
 49   * fixed bzWrite/bzRead to ignore zero-length requests.
 50   * fixed bzread to correctly handle read requests after EOF.
 51   * wrong parameter order in call to bzDecompressInit in
 52     bzBuffToBuffDecompress.  Fixed.
 53
 54In compress.c:
 55   * changed setting of nGroups in sendMTFValues() so as to 
 56     do a bit better on small files.  This _does_ effect
 57     bzip2.c.
 58
 59
 600.9.5a
 61~~~~~~
 62Major change: add a fallback sorting algorithm (blocksort.c)
 63to give reasonable behaviour even for very repetitive inputs.
 64Nuked --repetitive-best and --repetitive-fast since they are
 65no longer useful.
 66
 67Minor changes: mostly a whole bunch of small changes/
 68bugfixes in the driver (bzip2.c).  Changes pertaining to the
 69user interface are:
 70
 71   allow decompression of symlink'd files to stdout
 72   decompress/test files even without .bz2 extension
 73   give more accurate error messages for I/O errors
 74   when compressing/decompressing to stdout, don't catch control-C
 75   read flags from BZIP2 and BZIP environment variables
 76   decline to break hard links to a file unless forced with -f
 77   allow -c flag even with no filenames
 78   preserve file ownerships as far as possible
 79   make -s -1 give the expected block size (100k)
 80   add a flag -q --quiet to suppress nonessential warnings
 81   stop decoding flags after --, so files beginning in - can be handled
 82   resolved inconsistent naming: bzcat or bz2cat ?
 83   bzip2 --help now returns 0
 84
 85Programming-level changes are:
 86
 87   fixed syntax error in GET_LL4 for Borland C++ 5.02
 88   let bzBuffToBuffDecompress return BZ_DATA_ERROR{_MAGIC}
 89   fix overshoot of mode-string end in bzopen_or_bzdopen
 90   wrapped bzlib.h in #ifdef __cplusplus ... extern "C" { ... }
 91   close file handles under all error conditions
 92   added minor mods so it compiles with DJGPP out of the box
 93   fixed Makefile so it doesn't give problems with BSD make
 94   fix uninitialised memory reads in dlltest.c
 95
 960.9.5b
 97~~~~~~
 98Open stdin/stdout in binary mode for DJGPP.
 99
1000.9.5c
101~~~~~~
102Changed BZ_N_OVERSHOOT to be ... + 2 instead of ... + 1.  The + 1
103version could cause the sorted order to be wrong in some extremely
104obscure cases.  Also changed setting of quadrant in blocksort.c.
105
1060.9.5d
107~~~~~~
108The only functional change is to make bzlibVersion() in the library
109return the correct string.  This has no effect whatsoever on the
110functioning of the bzip2 program or library.  Added a couple of casts
111so the library compiles without warnings at level 3 in MS Visual
112Studio 6.0.  Included a Y2K statement in the file Y2K_INFO.  All other
113changes are minor documentation changes.
114
1151.0
116~~~
117Several minor bugfixes and enhancements:
118
119* Large file support.  The library uses 64-bit counters to
120  count the volume of data passing through it.  bzip2.c 
121  is now compiled with -D_FILE_OFFSET_BITS=64 to get large
122  file support from the C library.  -v correctly prints out
123  file sizes greater than 4 gigabytes.  All these changes have
124  been made without assuming a 64-bit platform or a C compiler
125  which supports 64-bit ints, so, except for the C library
126  aspect, they are fully portable.
127
128* Decompression robustness.  The library/program should be
129  robust to any corruption of compressed data, detecting and
130  handling _all_ corruption, instead of merely relying on
131  the CRCs.  What this means is that the program should 
132  never crash, given corrupted data, and the library should
133  always return BZ_DATA_ERROR.
134
135* Fixed an obscure race-condition bug only ever observed on
136  Solaris, in which, if you were very unlucky and issued
137  control-C at exactly the wrong time, both input and output
138  files would be deleted.
139
140* Don't run out of file handles on test/decompression when
141  large numbers of files have invalid magic numbers.
142
143* Avoid library namespace pollution.  Prefix all exported 
144  symbols with BZ2_.
145
146* Minor sorting enhancements from my DCC2000 paper.
147
148* Advance the version number to 1.0, so as to counteract the
149  (false-in-this-case) impression some people have that programs 
150  with version numbers less than 1.0 are in some way, experimental,
151  pre-release versions.
152
153* Create an initial Makefile-libbz2_so to build a shared library.
154  Yes, I know I should really use libtool et al ...
155
156* Make the program exit with 2 instead of 0 when decompression
157  fails due to a bad magic number (ie, an invalid bzip2 header).
158  Also exit with 1 (as the manual claims :-) whenever a diagnostic
159  message would have been printed AND the corresponding operation 
160  is aborted, for example
161     bzip2: Output file xx already exists.
162  When a diagnostic message is printed but the operation is not 
163  aborted, for example
164     bzip2: Can't guess original name for wurble -- using wurble.out
165  then the exit value 0 is returned, unless some other problem is
166  also detected.
167
168  I think it corresponds more closely to what the manual claims now.
169
170
1711.0.1
172~~~~~
173* Modified dlltest.c so it uses the new BZ2_ naming scheme.
174* Modified makefile-msc to fix minor build probs on Win2k.
175* Updated README.COMPILATION.PROBLEMS.
176
177There are no functionality changes or bug fixes relative to version
1781.0.0.  This is just a documentation update + a fix for minor Win32
179build problems.  For almost everyone, upgrading from 1.0.0 to 1.0.1 is
180utterly pointless.  Don't bother.
181
182
1831.0.2
184~~~~~
185A bug fix release, addressing various minor issues which have appeared
186in the 18 or so months since 1.0.1 was released.  Most of the fixes
187are to do with file-handling or documentation bugs.  To the best of my
188knowledge, there have been no data-loss-causing bugs reported in the
189compression/decompression engine of 1.0.0 or 1.0.1.
190
191Note that this release does not improve the rather crude build system
192for Unix platforms.  The general plan here is to autoconfiscate/
193libtoolise 1.0.2 soon after release, and release the result as 1.1.0
194or perhaps 1.2.0.  That, however, is still just a plan at this point.
195
196Here are the changes in 1.0.2.  Bug-reporters and/or patch-senders in
197parentheses.
198
199* Fix an infinite segfault loop in 1.0.1 when a directory is
200  encountered in -f (force) mode.
201     (Trond Eivind Glomsrod, Nicholas Nethercote, Volker Schmidt)
202
203* Avoid double fclose() of output file on certain I/O error paths.
204     (Solar Designer)
205
206* Don't fail with internal error 1007 when fed a long stream (> 48MB)
207  of byte 251.  Also print useful message suggesting that 1007s may be
208  caused by bad memory.
209     (noticed by Juan Pedro Vallejo, fixed by me)
210
211* Fix uninitialised variable silly bug in demo prog dlltest.c.
212     (Jorj Bauer)
213
214* Remove 512-MB limitation on recovered file size for bzip2recover
215  on selected platforms which support 64-bit ints.  At the moment
216  all GCC supported platforms, and Win32.
217     (me, Alson van der Meulen)
218
219* Hard-code header byte values, to give correct operation on platforms
220  using EBCDIC as their native character set (IBM's OS/390).
221     (Leland Lucius)
222
223* Copy file access times correctly.
224     (Marty Leisner)
225
226* Add distclean and check targets to Makefile.
227     (Michael Carmack)
228
229* Parameterise use of ar and ranlib in Makefile.  Also add $(LDFLAGS).
230     (Rich Ireland, Bo Thorsen)
231
232* Pass -p (create parent dirs as needed) to mkdir during make install.
233     (Jeremy Fusco)
234
235* Dereference symlinks when copying file permissions in -f mode.
236     (Volker Schmidt)
237
238* Majorly simplify implementation of uInt64_qrm10.
239     (Bo Lindbergh)
240
241* Check the input file still exists before deleting the output one,
242  when aborting in cleanUpAndFail().
243     (Joerg Prante, Robert Linden, Matthias Krings)
244
245Also a bunch of patches courtesy of Philippe Troin, the Debian maintainer
246of bzip2:
247
248* Wrapper scripts (with manpages): bzdiff, bzgrep, bzmore.
249
250* Spelling changes and minor enhancements in bzip2.1.
251
252* Avoid race condition between creating the output file and setting its
253  interim permissions safely, by using fopen_output_safely().
254  No changes to bzip2recover since there is no issue with file
255  permissions there.
256
257* do not print senseless report with -v when compressing an empty
258  file.
259
260* bzcat -f works on non-bzip2 files.
261
262* do not try to escape shell meta-characters on unix (the shell takes
263  care of these).
264
265* added --fast and --best aliases for -1 -9 for gzip compatibility.
266
267
2681.0.3 (15 Feb 05)
269~~~~~~~~~~~~~~~~~
270Fixes some minor bugs since the last version, 1.0.2.
271
272* Further robustification against corrupted compressed data.
273  There are currently no known bitstreams which can cause the
274  decompressor to crash, loop or access memory which does not
275  belong to it.  If you are using bzip2 or the library to 
276  decompress bitstreams from untrusted sources, an upgrade
277  to 1.0.3 is recommended.  This fixes CAN-2005-1260.
278
279* The documentation has been converted to XML, from which html
280  and pdf can be derived.
281
282* Various minor bugs in the documentation have been fixed.
283
284* Fixes for various compilation warnings with newer versions of
285  gcc, and on 64-bit platforms.
286
287* The BZ_NO_STDIO cpp symbol was not properly observed in 1.0.2.
288  This has been fixed.
289
290
2911.0.4 (20 Dec 06)
292~~~~~~~~~~~~~~~~~
293Fixes some minor bugs since the last version, 1.0.3.
294
295* Fix file permissions race problem (CAN-2005-0953).
296
297* Avoid possible segfault in BZ2_bzclose.  From Coverity's NetBSD
298  scan.
299
300* 'const'/prototype cleanups in the C code.
301
302* Change default install location to /usr/local, and handle multiple
303  'make install's without error.
304
305* Sanitise file names more carefully in bzgrep.  Fixes CAN-2005-0758
306  to the extent that applies to bzgrep.
307
308* Use 'mktemp' rather than 'tempfile' in bzdiff.
309
310* Tighten up a couple of assertions in blocksort.c following automated
311  analysis.
312
313* Fix minor doc/comment bugs.
314
315
3161.0.5 (10 Dec 07)
317~~~~~~~~~~~~~~~~~
318Security fix only.  Fixes CERT-FI 20469 as it applies to bzip2.
319