1592N/AZLIB DATA COMPRESSION LIBRARY

1592N/A

1592N/Azlib 1.2.3 is a general purpose data compression library. All the code is

1592N/Athread safe. The data format used by the zlib library is described by RFCs

1592N/A(Request for Comments) 1950 to 1952 in the files

1592N/Ahttp://www.ietf.org/rfc/rfc1950.txt (zlib format), rfc1951.txt (deflate format)

1592N/Aand rfc1952.txt (gzip format). These documents are also available in other

1592N/Aformats from ftp://ftp.uu.net/graphics/png/documents/zlib/zdoc-index.html

1592N/A

1592N/AAll functions of the compression library are documented in the file zlib.h

1592N/A(volunteer to write man pages welcome, contact zlib@gzip.org). A usage example

1592N/Aof the library is given in the file example.c which also tests that the library

1592N/Ais working correctly. Another example is given in the file minigzip.c. The

1592N/Acompression library itself is composed of all source files except example.c and

1592N/A

1592N/ATo compile all files and run the test program, follow the instructions given at

1592N/Athe top of Makefile. In short "make test; make install" should work for most

1592N/Amachines. For Unix: "./configure; make test; make install". For MSDOS, use one

1592N/Aof the special makefiles such as Makefile.msc. For VMS, use make_vms.com.

1592N/A

1592N/AQuestions about zlib should be sent to <zlib@gzip.org>, or to Gilles Vollant

1592N/A<info@winimage.com> for the Windows DLL version. The zlib home page is

1592N/Ahttp://www.zlib.org or http://www.gzip.org/zlib/ Before reporting a problem,

1592N/Aplease check this site to verify that you have the latest version of zlib;

1592N/Aotherwise get the latest version and check whether the problem still exists or

1592N/Anot.

1592N/A

1592N/APLEASE read the zlib FAQ http://www.gzip.org/zlib/zlib_faq.html before asking

1592N/Afor help.

1592N/A

1592N/AMark Nelson <markn@ieee.org> wrote an article about zlib for the Jan. 1997

1592N/Aissue of Dr. Dobb's Journal; a copy of the article is available in

1592N/A

1592N/AThe changes made in version 1.2.3 are documented in the file ChangeLog.

1592N/A

1592N/AUnsupported third party contributions are provided in directory "contrib".

1592N/A

1592N/AA Java implementation of zlib is available in the Java Development Kit

1592N/ASee the zlib home page http://www.zlib.org for details.

1592N/A

1592N/AA Perl interface to zlib written by Paul Marquess <pmqs@cpan.org> is in the

1592N/ACPAN (Comprehensive Perl Archive Network) sites

1592N/A

1592N/AA Python interface to zlib written by A.M. Kuchling <amk@amk.ca> is

1592N/Aavailable in Python 1.5 and later versions, see

1592N/A

1592N/AA zlib binding for TCL written by Andreas Kupries <a.kupries@westend.com> is

1592N/Aavaillable at http://www.oche.de/~akupries/soft/trf/trf_zip.html

1592N/A

1592N/AAn experimental package to read and write files in .zip format, written on top

1592N/Aof zlib by Gilles Vollant <info@winimage.com>, is available in the

1592N/Acontrib/minizip directory of zlib.

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1592N/A

1592N/ANotes for some targets:

1592N/A

1592N/A- For Windows DLL versions, please see win32/DLL_FAQ.txt

1592N/A

1592N/A- For 64-bit Irix, deflate.c must be compiled without any optimization. With

1592N/A -O, one libpng test fails. The test works in 32 bit mode (with the -n32

1592N/A compiler flag). The compiler bug has been reported to SGI.

1592N/A

1592N/A- zlib doesn't work with gcc 2.6.3 on a DEC 3000/300LX under OSF/1 2.1 it works

1592N/A when compiled with cc.

1592N/A

1592N/A- On Digital Unix 4.0D (formely OSF/1) on AlphaServer, the cc option -std1 is

1592N/A necessary to get gzprintf working correctly. This is done by configure.

1592N/A

1592N/A- zlib doesn't work on HP-UX 9.05 with some versions of /bin/cc. It works with

1592N/A other compilers. Use "make test" to check your compiler.

1592N/A

1592N/A- gzdopen is not supported on RISCOS, BEOS and by some Mac compilers.

1592N/A

1592N/A- For PalmOs, see http://palmzlib.sourceforge.net/

1592N/A

1592N/A- When building a shared, i.e. dynamic library on Mac OS X, the library must be

1592N/A installed before testing (do "make install" before "make test"), since the

1592N/A library location is specified in the library.

1592N/A

1592N/A

1592N/AAcknowledgments:

1592N/A

1592N/A The deflate format used by zlib was defined by Phil Katz. The deflate

1592N/A and zlib specifications were written by L. Peter Deutsch. Thanks to all the

1592N/A people who reported problems and suggested various improvements in zlib;

1592N/A they are too numerous to cite here.

1592N/A

1592N/ACopyright notice:

1592N/A

1592N/A (C) 1995-2004 Jean-loup Gailly and Mark Adler

1592N/A

1592N/A This software is provided 'as-is', without any express or implied

1592N/A warranty. In no event will the authors be held liable for any damages

1592N/A arising from the use of this software.

1592N/A

1592N/A Permission is granted to anyone to use this software for any purpose,

1592N/A including commercial applications, and to alter it and redistribute it

1592N/A freely, subject to the following restrictions:

1592N/A

1592N/A 1. The origin of this software must not be misrepresented; you must not

1592N/A claim that you wrote the original software. If you use this software

1592N/A in a product, an acknowledgment in the product documentation would be

1592N/A appreciated but is not required.

1592N/A 2. Altered source versions must be plainly marked as such, and must not be

1592N/A misrepresented as being the original software.

1592N/A 3. This notice may not be removed or altered from any source distribution.

1592N/A

1592N/A Jean-loup Gailly Mark Adler

1592N/A jloup@gzip.org madler@alumni.caltech.edu

1592N/A

1592N/AIf you use the zlib library in a product, we would appreciate *not*

1592N/Areceiving lengthy legal documents to sign. The sources are provided

1592N/Afor free but without warranty of any kind. The library has been

1592N/Aentirely written by Jean-loup Gailly and Mark Adler; it does not

1592N/Ainclude third-party code.

1592N/A

1592N/AIf you redistribute modified sources, we would appreciate that you include

1592N/Ain the file ChangeLog history information documenting your changes. Please

1592N/Aread the FAQ for more information on the distribution of modified source

1592N/Aversions.