Chris@4: ZLIB DATA COMPRESSION LIBRARY Chris@4: Chris@4: zlib 1.2.7 is a general purpose data compression library. All the code is Chris@4: thread safe. The data format used by the zlib library is described by RFCs Chris@4: (Request for Comments) 1950 to 1952 in the files Chris@4: http://tools.ietf.org/html/rfc1950 (zlib format), rfc1951 (deflate format) and Chris@4: rfc1952 (gzip format). Chris@4: Chris@4: All functions of the compression library are documented in the file zlib.h Chris@4: (volunteer to write man pages welcome, contact zlib@gzip.org). A usage example Chris@4: of the library is given in the file test/example.c which also tests that Chris@4: the library is working correctly. Another example is given in the file Chris@4: test/minigzip.c. The compression library itself is composed of all source Chris@4: files in the root directory. Chris@4: Chris@4: To compile all files and run the test program, follow the instructions given at Chris@4: the top of Makefile.in. In short "./configure; make test", and if that goes Chris@4: well, "make install" should work for most flavors of Unix. For Windows, use Chris@4: one of the special makefiles in win32/ or contrib/vstudio/ . For VMS, use Chris@4: make_vms.com. Chris@4: Chris@4: Questions about zlib should be sent to , or to Gilles Vollant Chris@4: for the Windows DLL version. The zlib home page is Chris@4: http://zlib.net/ . Before reporting a problem, please check this site to Chris@4: verify that you have the latest version of zlib; otherwise get the latest Chris@4: version and check whether the problem still exists or not. Chris@4: Chris@4: PLEASE read the zlib FAQ http://zlib.net/zlib_faq.html before asking for help. Chris@4: Chris@4: Mark Nelson wrote an article about zlib for the Jan. 1997 Chris@4: issue of Dr. Dobb's Journal; a copy of the article is available at Chris@4: http://marknelson.us/1997/01/01/zlib-engine/ . Chris@4: Chris@4: The changes made in version 1.2.7 are documented in the file ChangeLog. Chris@4: Chris@4: Unsupported third party contributions are provided in directory contrib/ . Chris@4: Chris@4: zlib is available in Java using the java.util.zip package, documented at Chris@4: http://java.sun.com/developer/technicalArticles/Programming/compression/ . Chris@4: Chris@4: A Perl interface to zlib written by Paul Marquess is available Chris@4: at CPAN (Comprehensive Perl Archive Network) sites, including Chris@4: http://search.cpan.org/~pmqs/IO-Compress-Zlib/ . Chris@4: Chris@4: A Python interface to zlib written by A.M. Kuchling is Chris@4: available in Python 1.5 and later versions, see Chris@4: http://docs.python.org/library/zlib.html . Chris@4: Chris@4: zlib is built into tcl: http://wiki.tcl.tk/4610 . Chris@4: Chris@4: An experimental package to read and write files in .zip format, written on top Chris@4: of zlib by Gilles Vollant , is available in the Chris@4: contrib/minizip directory of zlib. Chris@4: Chris@4: Chris@4: Notes for some targets: Chris@4: Chris@4: - For Windows DLL versions, please see win32/DLL_FAQ.txt Chris@4: Chris@4: - For 64-bit Irix, deflate.c must be compiled without any optimization. With Chris@4: -O, one libpng test fails. The test works in 32 bit mode (with the -n32 Chris@4: compiler flag). The compiler bug has been reported to SGI. Chris@4: Chris@4: - zlib doesn't work with gcc 2.6.3 on a DEC 3000/300LX under OSF/1 2.1 it works Chris@4: when compiled with cc. Chris@4: Chris@4: - On Digital Unix 4.0D (formely OSF/1) on AlphaServer, the cc option -std1 is Chris@4: necessary to get gzprintf working correctly. This is done by configure. Chris@4: Chris@4: - zlib doesn't work on HP-UX 9.05 with some versions of /bin/cc. It works with Chris@4: other compilers. Use "make test" to check your compiler. Chris@4: Chris@4: - gzdopen is not supported on RISCOS or BEOS. Chris@4: Chris@4: - For PalmOs, see http://palmzlib.sourceforge.net/ Chris@4: Chris@4: Chris@4: Acknowledgments: Chris@4: Chris@4: The deflate format used by zlib was defined by Phil Katz. The deflate and Chris@4: zlib specifications were written by L. Peter Deutsch. Thanks to all the Chris@4: people who reported problems and suggested various improvements in zlib; they Chris@4: are too numerous to cite here. Chris@4: Chris@4: Copyright notice: Chris@4: Chris@4: (C) 1995-2012 Jean-loup Gailly and Mark Adler Chris@4: Chris@4: This software is provided 'as-is', without any express or implied Chris@4: warranty. In no event will the authors be held liable for any damages Chris@4: arising from the use of this software. Chris@4: Chris@4: Permission is granted to anyone to use this software for any purpose, Chris@4: including commercial applications, and to alter it and redistribute it Chris@4: freely, subject to the following restrictions: Chris@4: Chris@4: 1. The origin of this software must not be misrepresented; you must not Chris@4: claim that you wrote the original software. If you use this software Chris@4: in a product, an acknowledgment in the product documentation would be Chris@4: appreciated but is not required. Chris@4: 2. Altered source versions must be plainly marked as such, and must not be Chris@4: misrepresented as being the original software. Chris@4: 3. This notice may not be removed or altered from any source distribution. Chris@4: Chris@4: Jean-loup Gailly Mark Adler Chris@4: jloup@gzip.org madler@alumni.caltech.edu Chris@4: Chris@4: If you use the zlib library in a product, we would appreciate *not* receiving Chris@4: lengthy legal documents to sign. The sources are provided for free but without Chris@4: warranty of any kind. The library has been entirely written by Jean-loup Chris@4: Gailly and Mark Adler; it does not include third-party code. Chris@4: Chris@4: If you redistribute modified sources, we would appreciate that you include in Chris@4: the file ChangeLog history information documenting your changes. Please read Chris@4: the FAQ for more information on the distribution of modified source versions.