diff options
Diffstat (limited to 'winsup/bz2lib/README')
| -rw-r--r-- | winsup/bz2lib/README | 166 |
1 files changed, 0 insertions, 166 deletions
diff --git a/winsup/bz2lib/README b/winsup/bz2lib/README deleted file mode 100644 index 22945a256..000000000 --- a/winsup/bz2lib/README +++ /dev/null @@ -1,166 +0,0 @@ - -This is the README for bzip2, a block-sorting file compressor, version -1.0. This version is fully compatible with the previous public -releases, bzip2-0.1pl2, bzip2-0.9.0 and bzip2-0.9.5. - -bzip2-1.0 is distributed under a BSD-style license. For details, -see the file LICENSE. - -Complete documentation is available in Postscript form (manual.ps) or -html (manual_toc.html). A plain-text version of the manual page is -available as bzip2.txt. A statement about Y2K issues is now included -in the file Y2K_INFO. - - -HOW TO BUILD -- UNIX - -Type `make'. This builds the library libbz2.a and then the -programs bzip2 and bzip2recover. Six self-tests are run. -If the self-tests complete ok, carry on to installation: - -To install in /usr/bin, /usr/lib, /usr/man and /usr/include, type - make install -To install somewhere else, eg, /xxx/yyy/{bin,lib,man,include}, type - make install PREFIX=/xxx/yyy -If you are (justifiably) paranoid and want to see what 'make install' -is going to do, you can first do - make -n install or - make -n install PREFIX=/xxx/yyy respectively. -The -n instructs make to show the commands it would execute, but -not actually execute them. - - -HOW TO BUILD -- UNIX, shared library libbz2.so. - -Do 'make -f Makefile-libbz2_so'. This Makefile seems to work for -Linux-ELF (RedHat 5.2 on an x86 box), with gcc. I make no claims -that it works for any other platform, though I suspect it probably -will work for most platforms employing both ELF and gcc. - -bzip2-shared, a client of the shared library, is also build, but -not self-tested. So I suggest you also build using the normal -Makefile, since that conducts a self-test. - -Important note for people upgrading .so's from 0.9.0/0.9.5 to -version 1.0. All the functions in the library have been renamed, -from (eg) bzCompress to BZ2_bzCompress, to avoid namespace pollution. -Unfortunately this means that the libbz2.so created by -Makefile-libbz2_so will not work with any program which used an -older version of the library. Sorry. I do encourage library -clients to make the effort to upgrade to use version 1.0, since -it is both faster and more robust than previous versions. - - -HOW TO BUILD -- Windows 95, NT, DOS, Mac, etc. - -It's difficult for me to support compilation on all these platforms. -My approach is to collect binaries for these platforms, and put them -on the master web page (http://sourceware.cygnus.com/bzip2). Look -there. However (FWIW), bzip2-1.0 is very standard ANSI C and should -compile unmodified with MS Visual C. For Win32, there is one -important caveat: in bzip2.c, you must set BZ_UNIX to 0 and -BZ_LCCWIN32 to 1 before building. If you have difficulties building, -you might want to read README.COMPILATION.PROBLEMS. - - -VALIDATION - -Correct operation, in the sense that a compressed file can always be -decompressed to reproduce the original, is obviously of paramount -importance. To validate bzip2, I used a modified version of Mark -Nelson's churn program. Churn is an automated test driver which -recursively traverses a directory structure, using bzip2 to compress -and then decompress each file it encounters, and checking that the -decompressed data is the same as the original. There are more details -in Section 4 of the user guide. - - - -Please read and be aware of the following: - -WARNING: - - This program (attempts to) compress data by performing several - non-trivial transformations on it. Unless you are 100% familiar - with *all* the algorithms contained herein, and with the - consequences of modifying them, you should NOT meddle with the - compression or decompression machinery. Incorrect changes can and - very likely *will* lead to disastrous loss of data. - - -DISCLAIMER: - - I TAKE NO RESPONSIBILITY FOR ANY LOSS OF DATA ARISING FROM THE - USE OF THIS PROGRAM, HOWSOEVER CAUSED. - - Every compression of a file implies an assumption that the - compressed file can be decompressed to reproduce the original. - Great efforts in design, coding and testing have been made to - ensure that this program works correctly. However, the complexity - of the algorithms, and, in particular, the presence of various - special cases in the code which occur with very low but non-zero - probability make it impossible to rule out the possibility of bugs - remaining in the program. DO NOT COMPRESS ANY DATA WITH THIS - PROGRAM UNLESS YOU ARE PREPARED TO ACCEPT THE POSSIBILITY, HOWEVER - SMALL, THAT THE DATA WILL NOT BE RECOVERABLE. - - That is not to say this program is inherently unreliable. Indeed, - I very much hope the opposite is true. bzip2 has been carefully - constructed and extensively tested. - - -PATENTS: - - To the best of my knowledge, bzip2 does not use any patented - algorithms. However, I do not have the resources available to - carry out a full patent search. Therefore I cannot give any - guarantee of the above statement. - -End of legalities. - - -WHAT'S NEW IN 0.9.0 (as compared to 0.1pl2) ? - - * Approx 10% faster compression, 30% faster decompression - * -t (test mode) is a lot quicker - * Can decompress concatenated compressed files - * Programming interface, so programs can directly read/write .bz2 files - * Less restrictive (BSD-style) licensing - * Flag handling more compatible with GNU gzip - * Much more documentation, i.e., a proper user manual - * Hopefully, improved portability (at least of the library) - -WHAT'S NEW IN 0.9.5 ? - - * Compression speed is much less sensitive to the input - data than in previous versions. Specifically, the very - slow performance caused by repetitive data is fixed. - * Many small improvements in file and flag handling. - * A Y2K statement. - -WHAT'S NEW IN 1.0 - - See the CHANGES file. - -I hope you find bzip2 useful. Feel free to contact me at - jseward@acm.org -if you have any suggestions or queries. Many people mailed me with -comments, suggestions and patches after the releases of bzip-0.15, -bzip-0.21, bzip2-0.1pl2 and bzip2-0.9.0, and the changes in bzip2 are -largely a result of this feedback. I thank you for your comments. - -At least for the time being, bzip2's "home" is (or can be reached via) -http://www.muraroa.demon.co.uk. - -Julian Seward -jseward@acm.org - -Cambridge, UK -18 July 1996 (version 0.15) -25 August 1996 (version 0.21) - 7 August 1997 (bzip2, version 0.1) -29 August 1997 (bzip2, version 0.1pl2) -23 August 1998 (bzip2, version 0.9.0) - 8 June 1999 (bzip2, version 0.9.5) - 4 Sept 1999 (bzip2, version 0.9.5d) - 5 May 2000 (bzip2, version 1.0pre8) |