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    3 zlib 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
   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.
   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 or
   21 descrip.mms.
   23 Questions about zlib should be sent to <zlib@gzip.org>, or to Gilles Vollant
   24 <info@winimage.com> for the Windows DLL version. The zlib home page is
   25 http://www.zlib.org or http://www.gzip.org/zlib/ Before reporting a problem,
   26 please check this site to verify that you have the latest version of zlib;
   27 otherwise get the latest version and check whether the problem still exists or
   28 not.
   30 PLEASE read the zlib FAQ http://www.gzip.org/zlib/zlib_faq.html before asking
   31 for help.
   33 Mark Nelson <markn@ieee.org> wrote an article about zlib for the Jan. 1997
   34 issue of  Dr. Dobb's Journal; a copy of the article is available in
   35 http://dogma.net/markn/articles/zlibtool/zlibtool.htm
   37 The changes made in version are documented in the file ChangeLog.
   39 Unsupported third party contributions are provided in directory "contrib".
   41 A Java implementation of zlib is available in the Java Development Kit
   42 http://java.sun.com/j2se/1.4.2/docs/api/java/util/zip/package-summary.html
   43 See the zlib home page http://www.zlib.org for details.
   45 A Perl interface to zlib written by Paul Marquess <pmqs@cpan.org> is in the
   46 CPAN (Comprehensive Perl Archive Network) sites
   47 http://www.cpan.org/modules/by-module/Compress/
   49 A Python interface to zlib written by A.M. Kuchling <amk@amk.ca> is
   50 available in Python 1.5 and later versions, see
   51 http://www.python.org/doc/lib/module-zlib.html
   53 A zlib binding for TCL written by Andreas Kupries <a.kupries@westend.com> is
   54 availlable at http://www.oche.de/~akupries/soft/trf/trf_zip.html
   56 An experimental package to read and write files in .zip format, written on top
   57 of zlib by Gilles Vollant <info@winimage.com>, is available in the
   58 contrib/minizip directory of zlib.
   61 Notes for some targets:
   63 - For Windows DLL versions, please see win32/DLL_FAQ.txt
   65 - For 64-bit Irix, deflate.c must be compiled without any optimization. With
   66   -O, one libpng test fails. The test works in 32 bit mode (with the -n32
   67   compiler flag). The compiler bug has been reported to SGI.
   69 - zlib doesn't work with gcc 2.6.3 on a DEC 3000/300LX under OSF/1 2.1 it works
   70   when compiled with cc.
   72 - On Digital Unix 4.0D (formely OSF/1) on AlphaServer, the cc option -std1 is
   73   necessary to get gzprintf working correctly. This is done by configure.
   75 - zlib doesn't work on HP-UX 9.05 with some versions of /bin/cc. It works with
   76   other compilers. Use "make test" to check your compiler.
   78 - gzdopen is not supported on RISCOS, BEOS and by some Mac compilers.
   80 - For PalmOs, see http://palmzlib.sourceforge.net/
   82 - When building a shared, i.e. dynamic library on Mac OS X, the library must be
   83   installed before testing (do "make install" before "make test"), since the
   84   library location is specified in the library.
   87 Acknowledgments:
   89   The deflate format used by zlib was defined by Phil Katz. The deflate
   90   and zlib specifications were written by L. Peter Deutsch. Thanks to all the
   91   people who reported problems and suggested various improvements in zlib;
   92   they are too numerous to cite here.
   94 Copyright notice:
   96  (C) 1995-2003 Jean-loup Gailly and Mark Adler
   98   This software is provided 'as-is', without any express or implied
   99   warranty.  In no event will the authors be held liable for any damages
  100   arising from the use of this software.
  102   Permission is granted to anyone to use this software for any purpose,
  103   including commercial applications, and to alter it and redistribute it
  104   freely, subject to the following restrictions:
  106   1. The origin of this software must not be misrepresented; you must not
  107      claim that you wrote the original software. If you use this software
  108      in a product, an acknowledgment in the product documentation would be
  109      appreciated but is not required.
  110   2. Altered source versions must be plainly marked as such, and must not be
  111      misrepresented as being the original software.
  112   3. This notice may not be removed or altered from any source distribution.
  114   Jean-loup Gailly        Mark Adler
  115   jloup@gzip.org          madler@alumni.caltech.edu
  117 If you use the zlib library in a product, we would appreciate *not*
  118 receiving lengthy legal documents to sign. The sources are provided
  119 for free but without warranty of any kind.  The library has been
  120 entirely written by Jean-loup Gailly and Mark Adler; it does not
  121 include third-party code.
  123 If you redistribute modified sources, we would appreciate that you include
  124 in the file ChangeLog history information documenting your changes. Please
  125 read the FAQ for more information on the distribution of modified source
  126 versions.