883N/AZLIB DATA COMPRESSION LIBRARY

883N/A

883N/Azlib 1.2.6 is a general purpose data compression library. All the code is

883N/Athread safe. The data format used by the zlib library is described by RFCs

883N/A(Request for Comments) 1950 to 1952 in the files

883N/Ahttp://tools.ietf.org/html/rfc1950 (zlib format), rfc1951 (deflate format) and

883N/Arfc1952 (gzip format).

883N/A

883N/AAll functions of the compression library are documented in the file zlib.h

883N/A(volunteer to write man pages welcome, contact zlib@gzip.org). A usage example

883N/Aof the library is given in the file test/example.c which also tests that

883N/Athe library is working correctly. Another example is given in the file

883N/Atest/minigzip.c. The compression library itself is composed of all source

883N/Afiles in the root directory.

883N/A

883N/ATo compile all files and run the test program, follow the instructions given at

883N/Athe top of Makefile.in. In short "./configure; make test", and if that goes

883N/Awell, "make install" should work for most flavors of Unix. For Windows, use

883N/Aone of the special makefiles in win32/ or contrib/vstudio/ . For VMS, use

883N/A

883N/AQuestions about zlib should be sent to <zlib@gzip.org>, or to Gilles Vollant

3996N/A<info@winimage.com> for the Windows DLL version. The zlib home page is

883N/Ahttp://zlib.net/ . Before reporting a problem, please check this site to

883N/Averify that you have the latest version of zlib; otherwise get the latest

883N/Aversion and check whether the problem still exists or not.

883N/A

883N/APLEASE read the zlib FAQ http://zlib.net/zlib_faq.html before asking for help.

883N/A

883N/AMark Nelson <markn@ieee.org> wrote an article about zlib for the Jan. 1997

883N/Aissue of Dr. Dobb's Journal; a copy of the article is available at

883N/Ahttp://marknelson.us/1997/01/01/zlib-engine/ .

1273N/A

883N/AThe changes made in version 1.2.6 are documented in the file ChangeLog.

883N/A

883N/AUnsupported third party contributions are provided in directory contrib/ .

883N/A

883N/Azlib is available in Java using the java.util.zip package, documented at

883N/Ahttp://java.sun.com/developer/technicalArticles/Programming/compression/ .

883N/A

883N/AA Perl interface to zlib written by Paul Marquess <pmqs@cpan.org> is available

1653N/Aat CPAN (Comprehensive Perl Archive Network) sites, including

883N/Ahttp://search.cpan.org/~pmqs/IO-Compress-Zlib/ .

956N/A

883N/AA Python interface to zlib written by A.M. Kuchling <amk@amk.ca> is

883N/Aavailable in Python 1.5 and later versions, see

883N/Ahttp://docs.python.org/library/zlib.html .

883N/A

883N/Azlib is built into tcl: http://wiki.tcl.tk/4610 .

883N/A

883N/AAn experimental package to read and write files in .zip format, written on top

883N/Aof zlib by Gilles Vollant <info@winimage.com>, is available in the

1574N/Acontrib/minizip directory of zlib.

1574N/A

1574N/A

883N/ANotes for some targets:

883N/A

883N/A- For Windows DLL versions, please see win32/DLL_FAQ.txt

883N/A

883N/A- For 64-bit Irix, deflate.c must be compiled without any optimization. With

883N/A -O, one libpng test fails. The test works in 32 bit mode (with the -n32

883N/A compiler flag). The compiler bug has been reported to SGI.

883N/A

883N/A- zlib doesn't work with gcc 2.6.3 on a DEC 3000/300LX under OSF/1 2.1 it works

883N/A when compiled with cc.

887N/A

887N/A- On Digital Unix 4.0D (formely OSF/1) on AlphaServer, the cc option -std1 is

887N/A necessary to get gzprintf working correctly. This is done by configure.

913N/A

913N/A- zlib doesn't work on HP-UX 9.05 with some versions of /bin/cc. It works with

913N/A other compilers. Use "make test" to check your compiler.

913N/A

883N/A- gzdopen is not supported on RISCOS or BEOS.

3996N/A

- For PalmOs, see http://palmzlib.sourceforge.net/

Acknowledgments:

The deflate format used by zlib was defined by Phil Katz. The deflate and

zlib specifications were written by L. Peter Deutsch. Thanks to all the

people who reported problems and suggested various improvements in zlib; they

are too numerous to cite here.

Copyright notice:

(C) 1995-2012 Jean-loup Gailly and Mark Adler

This software is provided 'as-is', without any express or implied

warranty. In no event will the authors be held liable for any damages

arising from the use of this software.

Permission is granted to anyone to use this software for any purpose,

including commercial applications, and to alter it and redistribute it

freely, subject to the following restrictions:

1. The origin of this software must not be misrepresented; you must not

claim that you wrote the original software. If you use this software

in a product, an acknowledgment in the product documentation would be

appreciated but is not required.

2. Altered source versions must be plainly marked as such, and must not be

misrepresented as being the original software.

3. This notice may not be removed or altered from any source distribution.

Jean-loup Gailly Mark Adler

jloup@gzip.org madler@alumni.caltech.edu

If you use the zlib library in a product, we would appreciate *not* receiving

lengthy legal documents to sign. The sources are provided for free but without

warranty of any kind. The library has been entirely written by Jean-loup

Gailly and Mark Adler; it does not include third-party code.

If you redistribute modified sources, we would appreciate that you include in

the file ChangeLog history information documenting your changes. Please read

the FAQ for more information on the distribution of modified source versions.