cannam@89: ZLIB DATA COMPRESSION LIBRARY cannam@89: cannam@89: zlib 1.2.7 is a general purpose data compression library. All the code is cannam@89: thread safe. The data format used by the zlib library is described by RFCs cannam@89: (Request for Comments) 1950 to 1952 in the files cannam@89: http://tools.ietf.org/html/rfc1950 (zlib format), rfc1951 (deflate format) and cannam@89: rfc1952 (gzip format). cannam@89: cannam@89: All functions of the compression library are documented in the file zlib.h cannam@89: (volunteer to write man pages welcome, contact zlib@gzip.org). A usage example cannam@89: of the library is given in the file test/example.c which also tests that cannam@89: the library is working correctly. Another example is given in the file cannam@89: test/minigzip.c. The compression library itself is composed of all source cannam@89: files in the root directory. cannam@89: cannam@89: To compile all files and run the test program, follow the instructions given at cannam@89: the top of Makefile.in. In short "./configure; make test", and if that goes cannam@89: well, "make install" should work for most flavors of Unix. For Windows, use cannam@89: one of the special makefiles in win32/ or contrib/vstudio/ . For VMS, use cannam@89: make_vms.com. cannam@89: cannam@89: Questions about zlib should be sent to , or to Gilles Vollant cannam@89: for the Windows DLL version. The zlib home page is cannam@89: http://zlib.net/ . Before reporting a problem, please check this site to cannam@89: verify that you have the latest version of zlib; otherwise get the latest cannam@89: version and check whether the problem still exists or not. cannam@89: cannam@89: PLEASE read the zlib FAQ http://zlib.net/zlib_faq.html before asking for help. cannam@89: cannam@89: Mark Nelson wrote an article about zlib for the Jan. 1997 cannam@89: issue of Dr. Dobb's Journal; a copy of the article is available at cannam@89: http://marknelson.us/1997/01/01/zlib-engine/ . cannam@89: cannam@89: The changes made in version 1.2.7 are documented in the file ChangeLog. cannam@89: cannam@89: Unsupported third party contributions are provided in directory contrib/ . cannam@89: cannam@89: zlib is available in Java using the java.util.zip package, documented at cannam@89: http://java.sun.com/developer/technicalArticles/Programming/compression/ . cannam@89: cannam@89: A Perl interface to zlib written by Paul Marquess is available cannam@89: at CPAN (Comprehensive Perl Archive Network) sites, including cannam@89: http://search.cpan.org/~pmqs/IO-Compress-Zlib/ . cannam@89: cannam@89: A Python interface to zlib written by A.M. Kuchling is cannam@89: available in Python 1.5 and later versions, see cannam@89: http://docs.python.org/library/zlib.html . cannam@89: cannam@89: zlib is built into tcl: http://wiki.tcl.tk/4610 . cannam@89: cannam@89: An experimental package to read and write files in .zip format, written on top cannam@89: of zlib by Gilles Vollant , is available in the cannam@89: contrib/minizip directory of zlib. cannam@89: cannam@89: cannam@89: Notes for some targets: cannam@89: cannam@89: - For Windows DLL versions, please see win32/DLL_FAQ.txt cannam@89: cannam@89: - For 64-bit Irix, deflate.c must be compiled without any optimization. With cannam@89: -O, one libpng test fails. The test works in 32 bit mode (with the -n32 cannam@89: compiler flag). The compiler bug has been reported to SGI. cannam@89: cannam@89: - zlib doesn't work with gcc 2.6.3 on a DEC 3000/300LX under OSF/1 2.1 it works cannam@89: when compiled with cc. cannam@89: cannam@89: - On Digital Unix 4.0D (formely OSF/1) on AlphaServer, the cc option -std1 is cannam@89: necessary to get gzprintf working correctly. This is done by configure. cannam@89: cannam@89: - zlib doesn't work on HP-UX 9.05 with some versions of /bin/cc. It works with cannam@89: other compilers. Use "make test" to check your compiler. cannam@89: cannam@89: - gzdopen is not supported on RISCOS or BEOS. cannam@89: cannam@89: - For PalmOs, see http://palmzlib.sourceforge.net/ cannam@89: cannam@89: cannam@89: Acknowledgments: cannam@89: cannam@89: The deflate format used by zlib was defined by Phil Katz. The deflate and cannam@89: zlib specifications were written by L. Peter Deutsch. Thanks to all the cannam@89: people who reported problems and suggested various improvements in zlib; they cannam@89: are too numerous to cite here. cannam@89: cannam@89: Copyright notice: cannam@89: cannam@89: (C) 1995-2012 Jean-loup Gailly and Mark Adler cannam@89: cannam@89: This software is provided 'as-is', without any express or implied cannam@89: warranty. In no event will the authors be held liable for any damages cannam@89: arising from the use of this software. cannam@89: cannam@89: Permission is granted to anyone to use this software for any purpose, cannam@89: including commercial applications, and to alter it and redistribute it cannam@89: freely, subject to the following restrictions: cannam@89: cannam@89: 1. The origin of this software must not be misrepresented; you must not cannam@89: claim that you wrote the original software. If you use this software cannam@89: in a product, an acknowledgment in the product documentation would be cannam@89: appreciated but is not required. cannam@89: 2. Altered source versions must be plainly marked as such, and must not be cannam@89: misrepresented as being the original software. cannam@89: 3. This notice may not be removed or altered from any source distribution. cannam@89: cannam@89: Jean-loup Gailly Mark Adler cannam@89: jloup@gzip.org madler@alumni.caltech.edu cannam@89: cannam@89: If you use the zlib library in a product, we would appreciate *not* receiving cannam@89: lengthy legal documents to sign. The sources are provided for free but without cannam@89: warranty of any kind. The library has been entirely written by Jean-loup cannam@89: Gailly and Mark Adler; it does not include third-party code. cannam@89: cannam@89: If you redistribute modified sources, we would appreciate that you include in cannam@89: the file ChangeLog history information documenting your changes. Please read cannam@89: the FAQ for more information on the distribution of modified source versions.