ZLIB DATA COMPRESSION LIBRARY+ −
+ − zlib 1.2.3 is a general purpose data compression library. All the code is+ −
thread safe. The data format used by the zlib library is described by RFCs+ −
(Request for Comments) 1950 to 1952 in the files+ −
http://www.ietf.org/rfc/rfc1950.txt (zlib format), rfc1951.txt (deflate format)+ −
and rfc1952.txt (gzip format). These documents are also available in other+ −
formats from ftp://ftp.uu.net/graphics/png/documents/zlib/zdoc-index.html+ −
+ − All functions of the compression library are documented in the file zlib.h+ −
(volunteer to write man pages welcome, contact zlib@gzip.org). A usage example+ −
of the library is given in the file example.c which also tests that the library+ −
is working correctly. Another example is given in the file minigzip.c. The+ −
compression library itself is composed of all source files except example.c and+ −
minigzip.c.+ −
+ − To compile all files and run the test program, follow the instructions given at+ −
the top of Makefile. In short "make test; make install" should work for most+ −
machines. For Unix: "./configure; make test; make install". For MSDOS, use one+ −
of the special makefiles such as Makefile.msc. For VMS, use make_vms.com.+ −
+ − Questions about zlib should be sent to <zlib@gzip.org>, or to Gilles Vollant+ −
<info@winimage.com> for the Windows DLL version. The zlib home page is+ −
http://www.zlib.org or http://www.gzip.org/zlib/ Before reporting a problem,+ −
please check this site to verify that you have the latest version of zlib;+ −
otherwise get the latest version and check whether the problem still exists or+ −
not.+ −
+ − PLEASE read the zlib FAQ http://www.gzip.org/zlib/zlib_faq.html before asking+ −
for help.+ −
+ − Mark Nelson <markn@ieee.org> wrote an article about zlib for the Jan. 1997+ −
issue of Dr. Dobb's Journal; a copy of the article is available in+ −
http://dogma.net/markn/articles/zlibtool/zlibtool.htm+ −
+ − The changes made in version 1.2.3 are documented in the file ChangeLog.+ −
+ − Unsupported third party contributions are provided in directory "contrib".+ −
+ − A Java implementation of zlib is available in the Java Development Kit+ −
http://java.sun.com/j2se/1.4.2/docs/api/java/util/zip/package-summary.html+ −
See the zlib home page http://www.zlib.org for details.+ −
+ − A Perl interface to zlib written by Paul Marquess <pmqs@cpan.org> is in the+ −
CPAN (Comprehensive Perl Archive Network) sites+ −
http://www.cpan.org/modules/by-module/Compress/+ −
+ − A Python interface to zlib written by A.M. Kuchling <amk@amk.ca> is+ −
available in Python 1.5 and later versions, see+ −
http://www.python.org/doc/lib/module-zlib.html+ −
+ − A zlib binding for TCL written by Andreas Kupries <a.kupries@westend.com> is+ −
availlable at http://www.oche.de/~akupries/soft/trf/trf_zip.html+ −
+ − An experimental package to read and write files in .zip format, written on top+ −
of zlib by Gilles Vollant <info@winimage.com>, is available in the+ −
contrib/minizip directory of zlib.+ −
+ − + − Notes for some targets:+ −
+ − - For Windows DLL versions, please see win32/DLL_FAQ.txt+ −
+ − - For 64-bit Irix, deflate.c must be compiled without any optimization. With+ −
-O, one libpng test fails. The test works in 32 bit mode (with the -n32+ −
compiler flag). The compiler bug has been reported to SGI.+ −
+ − - zlib doesn't work with gcc 2.6.3 on a DEC 3000/300LX under OSF/1 2.1 it works+ −
when compiled with cc.+ −
+ − - On Digital Unix 4.0D (formely OSF/1) on AlphaServer, the cc option -std1 is+ −
necessary to get gzprintf working correctly. This is done by configure.+ −
+ − - zlib doesn't work on HP-UX 9.05 with some versions of /bin/cc. It works with+ −
other compilers. Use "make test" to check your compiler.+ −
+ − - gzdopen is not supported on RISCOS, BEOS and by some Mac compilers.+ −
+ − - For PalmOs, see http://palmzlib.sourceforge.net/+ −
+ − - When building a shared, i.e. dynamic library on Mac OS X, the library must be+ −
installed before testing (do "make install" before "make test"), since the+ −
library location is specified in the library.+ −
+ − + − 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) 1995-2004 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.+ −