cannam@128: ZLIB DATA COMPRESSION LIBRARY cannam@128: cannam@128: zlib 1.2.8 is a general purpose data compression library. All the code is cannam@128: thread safe. The data format used by the zlib library is described by RFCs cannam@128: (Request for Comments) 1950 to 1952 in the files cannam@128: http://tools.ietf.org/html/rfc1950 (zlib format), rfc1951 (deflate format) and cannam@128: rfc1952 (gzip format). cannam@128: cannam@128: All functions of the compression library are documented in the file zlib.h cannam@128: (volunteer to write man pages welcome, contact zlib@gzip.org). A usage example cannam@128: of the library is given in the file test/example.c which also tests that cannam@128: the library is working correctly. Another example is given in the file cannam@128: test/minigzip.c. The compression library itself is composed of all source cannam@128: files in the root directory. cannam@128: cannam@128: To compile all files and run the test program, follow the instructions given at cannam@128: the top of Makefile.in. In short "./configure; make test", and if that goes cannam@128: well, "make install" should work for most flavors of Unix. For Windows, use cannam@128: one of the special makefiles in win32/ or contrib/vstudio/ . For VMS, use cannam@128: make_vms.com. cannam@128: cannam@128: Questions about zlib should be sent to , or to Gilles Vollant cannam@128: for the Windows DLL version. The zlib home page is cannam@128: http://zlib.net/ . Before reporting a problem, please check this site to cannam@128: verify that you have the latest version of zlib; otherwise get the latest cannam@128: version and check whether the problem still exists or not. cannam@128: cannam@128: PLEASE read the zlib FAQ http://zlib.net/zlib_faq.html before asking for help. cannam@128: cannam@128: Mark Nelson wrote an article about zlib for the Jan. 1997 cannam@128: issue of Dr. Dobb's Journal; a copy of the article is available at cannam@128: http://marknelson.us/1997/01/01/zlib-engine/ . cannam@128: cannam@128: The changes made in version 1.2.8 are documented in the file ChangeLog. cannam@128: cannam@128: Unsupported third party contributions are provided in directory contrib/ . cannam@128: cannam@128: zlib is available in Java using the java.util.zip package, documented at cannam@128: http://java.sun.com/developer/technicalArticles/Programming/compression/ . cannam@128: cannam@128: A Perl interface to zlib written by Paul Marquess is available cannam@128: at CPAN (Comprehensive Perl Archive Network) sites, including cannam@128: http://search.cpan.org/~pmqs/IO-Compress-Zlib/ . cannam@128: cannam@128: A Python interface to zlib written by A.M. Kuchling is cannam@128: available in Python 1.5 and later versions, see cannam@128: http://docs.python.org/library/zlib.html . cannam@128: cannam@128: zlib is built into tcl: http://wiki.tcl.tk/4610 . cannam@128: cannam@128: An experimental package to read and write files in .zip format, written on top cannam@128: of zlib by Gilles Vollant , is available in the cannam@128: contrib/minizip directory of zlib. cannam@128: cannam@128: cannam@128: Notes for some targets: cannam@128: cannam@128: - For Windows DLL versions, please see win32/DLL_FAQ.txt cannam@128: cannam@128: - For 64-bit Irix, deflate.c must be compiled without any optimization. With cannam@128: -O, one libpng test fails. The test works in 32 bit mode (with the -n32 cannam@128: compiler flag). The compiler bug has been reported to SGI. cannam@128: cannam@128: - zlib doesn't work with gcc 2.6.3 on a DEC 3000/300LX under OSF/1 2.1 it works cannam@128: when compiled with cc. cannam@128: cannam@128: - On Digital Unix 4.0D (formely OSF/1) on AlphaServer, the cc option -std1 is cannam@128: necessary to get gzprintf working correctly. This is done by configure. cannam@128: cannam@128: - zlib doesn't work on HP-UX 9.05 with some versions of /bin/cc. It works with cannam@128: other compilers. Use "make test" to check your compiler. cannam@128: cannam@128: - gzdopen is not supported on RISCOS or BEOS. cannam@128: cannam@128: - For PalmOs, see http://palmzlib.sourceforge.net/ cannam@128: cannam@128: cannam@128: Acknowledgments: cannam@128: cannam@128: The deflate format used by zlib was defined by Phil Katz. The deflate and cannam@128: zlib specifications were written by L. Peter Deutsch. Thanks to all the cannam@128: people who reported problems and suggested various improvements in zlib; they cannam@128: are too numerous to cite here. cannam@128: cannam@128: Copyright notice: cannam@128: cannam@128: (C) 1995-2013 Jean-loup Gailly and Mark Adler cannam@128: cannam@128: This software is provided 'as-is', without any express or implied cannam@128: warranty. In no event will the authors be held liable for any damages cannam@128: arising from the use of this software. cannam@128: cannam@128: Permission is granted to anyone to use this software for any purpose, cannam@128: including commercial applications, and to alter it and redistribute it cannam@128: freely, subject to the following restrictions: cannam@128: cannam@128: 1. The origin of this software must not be misrepresented; you must not cannam@128: claim that you wrote the original software. If you use this software cannam@128: in a product, an acknowledgment in the product documentation would be cannam@128: appreciated but is not required. cannam@128: 2. Altered source versions must be plainly marked as such, and must not be cannam@128: misrepresented as being the original software. cannam@128: 3. This notice may not be removed or altered from any source distribution. cannam@128: cannam@128: Jean-loup Gailly Mark Adler cannam@128: jloup@gzip.org madler@alumni.caltech.edu cannam@128: cannam@128: If you use the zlib library in a product, we would appreciate *not* receiving cannam@128: lengthy legal documents to sign. The sources are provided for free but without cannam@128: warranty of any kind. The library has been entirely written by Jean-loup cannam@128: Gailly and Mark Adler; it does not include third-party code. cannam@128: cannam@128: If you redistribute modified sources, we would appreciate that you include in cannam@128: the file ChangeLog history information documenting your changes. Please read cannam@128: the FAQ for more information on the distribution of modified source versions.