The Design and Implementation of the FreeBSD Operating System, Second Edition
Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)


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Name Size Last modified (GMT) Description
Back Parent directory 2009-09-10 23:52:28
File README 5696 bytes 2009-09-10 23:52:25
C file adler32.c 5954 bytes 2009-09-10 23:52:14
C file compress.c 3884 bytes 2009-09-10 23:52:14
C file crc32.c 14529 bytes 2009-09-10 23:52:14
C file crc32.h 31892 bytes 2009-09-10 23:52:14
C file deflate.c 65552 bytes 2009-09-10 23:52:14
C file deflate.h 13438 bytes 2009-09-10 23:52:14
C file gzio.c 32439 bytes 2009-09-10 23:52:14
C file infback.c 23531 bytes 2009-09-10 23:52:14
C file inffast.c 13892 bytes 2009-09-10 23:52:14
C file inffast.h 1731 bytes 2009-09-10 23:52:14
C file inffixed.h 7667 bytes 2009-09-10 23:52:14
C file inflate.c 50362 bytes 2009-09-10 23:52:14
C file inflate.h 7240 bytes 2009-09-10 23:52:14
C file inftrees.c 15080 bytes 2009-09-10 23:52:14
C file inftrees.h 3697 bytes 2009-09-10 23:52:14
C file trees.c 45351 bytes 2009-09-10 23:52:14
C file trees.h 9768 bytes 2009-09-10 23:52:14
C file uncompr.c 3482 bytes 2009-09-10 23:52:14
C file zutil.c 8504 bytes 2009-09-10 23:52:14
C file zutil.h 8482 bytes 2009-09-10 23:52:14

    1 ZLIB DATA COMPRESSION LIBRARY
    2 
    3 zlib 1.2.3 is a general purpose data compression library.  All the code is
    4 thread safe.  The data format used by the zlib library is described by RFCs
    5 (Request for Comments) 1950 to 1952 in the files
    6 http://www.ietf.org/rfc/rfc1950.txt (zlib format), rfc1951.txt (deflate format)
    7 and rfc1952.txt (gzip format). These documents are also available in other
    8 formats from ftp://ftp.uu.net/graphics/png/documents/zlib/zdoc-index.html
    9 
   10 All functions of the compression library are documented in the file zlib.h
   11 (volunteer to write man pages welcome, contact zlib@gzip.org). A usage example
   12 of the library is given in the file example.c which also tests that the library
   13 is working correctly. Another example is given in the file minigzip.c. The
   14 compression library itself is composed of all source files except example.c and
   15 minigzip.c.
   16 
   17 To compile all files and run the test program, follow the instructions given at
   18 the top of Makefile. In short "make test; make install" should work for most
   19 machines. For Unix: "./configure; make test; make install". For MSDOS, use one
   20 of the special makefiles such as Makefile.msc. For VMS, use make_vms.com.
   21 
   22 Questions about zlib should be sent to <zlib@gzip.org>, or to Gilles Vollant
   23 <info@winimage.com> for the Windows DLL version. The zlib home page is
   24 http://www.zlib.org or http://www.gzip.org/zlib/ Before reporting a problem,
   25 please check this site to verify that you have the latest version of zlib;
   26 otherwise get the latest version and check whether the problem still exists or
   27 not.
   28 
   29 PLEASE read the zlib FAQ http://www.gzip.org/zlib/zlib_faq.html before asking
   30 for help.
   31 
   32 Mark Nelson <markn@ieee.org> wrote an article about zlib for the Jan. 1997
   33 issue of  Dr. Dobb's Journal; a copy of the article is available in
   34 http://dogma.net/markn/articles/zlibtool/zlibtool.htm
   35 
   36 The changes made in version 1.2.3 are documented in the file ChangeLog.
   37 
   38 Unsupported third party contributions are provided in directory "contrib".
   39 
   40 A Java implementation of zlib is available in the Java Development Kit
   41 http://java.sun.com/j2se/1.4.2/docs/api/java/util/zip/package-summary.html
   42 See the zlib home page http://www.zlib.org for details.
   43 
   44 A Perl interface to zlib written by Paul Marquess <pmqs@cpan.org> is in the
   45 CPAN (Comprehensive Perl Archive Network) sites
   46 http://www.cpan.org/modules/by-module/Compress/
   47 
   48 A Python interface to zlib written by A.M. Kuchling <amk@amk.ca> is
   49 available in Python 1.5 and later versions, see
   50 http://www.python.org/doc/lib/module-zlib.html
   51 
   52 A zlib binding for TCL written by Andreas Kupries <a.kupries@westend.com> is
   53 availlable at http://www.oche.de/~akupries/soft/trf/trf_zip.html
   54 
   55 An experimental package to read and write files in .zip format, written on top
   56 of zlib by Gilles Vollant <info@winimage.com>, is available in the
   57 contrib/minizip directory of zlib.
   58 
   59 
   60 Notes for some targets:
   61 
   62 - For Windows DLL versions, please see win32/DLL_FAQ.txt
   63 
   64 - For 64-bit Irix, deflate.c must be compiled without any optimization. With
   65   -O, one libpng test fails. The test works in 32 bit mode (with the -n32
   66   compiler flag). The compiler bug has been reported to SGI.
   67 
   68 - zlib doesn't work with gcc 2.6.3 on a DEC 3000/300LX under OSF/1 2.1 it works
   69   when compiled with cc.
   70 
   71 - On Digital Unix 4.0D (formely OSF/1) on AlphaServer, the cc option -std1 is
   72   necessary to get gzprintf working correctly. This is done by configure.
   73 
   74 - zlib doesn't work on HP-UX 9.05 with some versions of /bin/cc. It works with
   75   other compilers. Use "make test" to check your compiler.
   76 
   77 - gzdopen is not supported on RISCOS, BEOS and by some Mac compilers.
   78 
   79 - For PalmOs, see http://palmzlib.sourceforge.net/
   80 
   81 - When building a shared, i.e. dynamic library on Mac OS X, the library must be
   82   installed before testing (do "make install" before "make test"), since the
   83   library location is specified in the library.
   84 
   85 
   86 Acknowledgments:
   87 
   88   The deflate format used by zlib was defined by Phil Katz. The deflate
   89   and zlib specifications were written by L. Peter Deutsch. Thanks to all the
   90   people who reported problems and suggested various improvements in zlib;
   91   they are too numerous to cite here.
   92 
   93 Copyright notice:
   94 
   95  (C) 1995-2004 Jean-loup Gailly and Mark Adler
   96 
   97   This software is provided 'as-is', without any express or implied
   98   warranty.  In no event will the authors be held liable for any damages
   99   arising from the use of this software.
  100 
  101   Permission is granted to anyone to use this software for any purpose,
  102   including commercial applications, and to alter it and redistribute it
  103   freely, subject to the following restrictions:
  104 
  105   1. The origin of this software must not be misrepresented; you must not
  106      claim that you wrote the original software. If you use this software
  107      in a product, an acknowledgment in the product documentation would be
  108      appreciated but is not required.
  109   2. Altered source versions must be plainly marked as such, and must not be
  110      misrepresented as being the original software.
  111   3. This notice may not be removed or altered from any source distribution.
  112 
  113   Jean-loup Gailly        Mark Adler
  114   jloup@gzip.org          madler@alumni.caltech.edu
  115 
  116 If you use the zlib library in a product, we would appreciate *not*
  117 receiving lengthy legal documents to sign. The sources are provided
  118 for free but without warranty of any kind.  The library has been
  119 entirely written by Jean-loup Gailly and Mark Adler; it does not
  120 include third-party code.
  121 
  122 If you redistribute modified sources, we would appreciate that you include
  123 in the file ChangeLog history information documenting your changes. Please
  124 read the FAQ for more information on the distribution of modified source
  125 versions.

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