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0001 ZLIB DATA COMPRESSION LIBRARY 0002 0003 zlib 1.2.8 is a general purpose data compression library. All the code is 0004 thread safe. The data format used by the zlib library is described by RFCs 0005 (Request for Comments) 1950 to 1952 in the files 0006 http://tools.ietf.org/html/rfc1950 (zlib format), rfc1951 (deflate format) and 0007 rfc1952 (gzip format). 0008 0009 All functions of the compression library are documented in the file zlib.h 0010 (volunteer to write man pages welcome, contact firstname.lastname@example.org). A usage example 0011 of the library is given in the file test/example.c which also tests that 0012 the library is working correctly. Another example is given in the file 0013 test/minigzip.c. The compression library itself is composed of all source 0014 files in the root directory. 0015 0016 To compile all files and run the test program, follow the instructions given at 0017 the top of Makefile.in. In short "./configure; make test", and if that goes 0018 well, "make install" should work for most flavors of Unix. For Windows, use 0019 one of the special makefiles in win32/ or contrib/vstudio/ . For VMS, use 0020 make_vms.com. 0021 0022 Questions about zlib should be sent to <email@example.com>, or to Gilles Vollant 0023 <firstname.lastname@example.org> for the Windows DLL version. The zlib home page is 0024 http://zlib.net/ . Before reporting a problem, please check this site to 0025 verify that you have the latest version of zlib; otherwise get the latest 0026 version and check whether the problem still exists or not. 0027 0028 PLEASE read the zlib FAQ http://zlib.net/zlib_faq.html before asking for help. 0029 0030 Mark Nelson <email@example.com> wrote an article about zlib for the Jan. 1997 0031 issue of Dr. Dobb's Journal; a copy of the article is available at 0032 http://marknelson.us/1997/01/01/zlib-engine/ . 0033 0034 The changes made in version 1.2.8 are documented in the file ChangeLog. 0035 0036 Unsupported third party contributions are provided in directory contrib/ . 0037 0038 zlib is available in Java using the java.util.zip package, documented at 0039 http://java.sun.com/developer/technicalArticles/Programming/compression/ . 0040 0041 A Perl interface to zlib written by Paul Marquess <firstname.lastname@example.org> is available 0042 at CPAN (Comprehensive Perl Archive Network) sites, including 0043 http://search.cpan.org/~pmqs/IO-Compress-Zlib/ . 0044 0045 A Python interface to zlib written by A.M. Kuchling <email@example.com> is 0046 available in Python 1.5 and later versions, see 0047 http://docs.python.org/library/zlib.html . 0048 0049 zlib is built into tcl: http://wiki.tcl.tk/4610 . 0050 0051 An experimental package to read and write files in .zip format, written on top 0052 of zlib by Gilles Vollant <firstname.lastname@example.org>, is available in the 0053 contrib/minizip directory of zlib. 0054 0055 0056 Notes for some targets: 0057 0058 - For Windows DLL versions, please see win32/DLL_FAQ.txt 0059 0060 - For 64-bit Irix, deflate.c must be compiled without any optimization. With 0061 -O, one libpng test fails. The test works in 32 bit mode (with the -n32 0062 compiler flag). The compiler bug has been reported to SGI. 0063 0064 - zlib doesn't work with gcc 2.6.3 on a DEC 3000/300LX under OSF/1 2.1 it works 0065 when compiled with cc. 0066 0067 - On Digital Unix 4.0D (formely OSF/1) on AlphaServer, the cc option -std1 is 0068 necessary to get gzprintf working correctly. This is done by configure. 0069 0070 - zlib doesn't work on HP-UX 9.05 with some versions of /bin/cc. It works with 0071 other compilers. Use "make test" to check your compiler. 0072 0073 - gzdopen is not supported on RISCOS or BEOS. 0074 0075 - For PalmOs, see http://palmzlib.sourceforge.net/ 0076 0077 0078 Acknowledgments: 0079 0080 The deflate format used by zlib was defined by Phil Katz. The deflate and 0081 zlib specifications were written by L. Peter Deutsch. Thanks to all the 0082 people who reported problems and suggested various improvements in zlib; they 0083 are too numerous to cite here. 0084 0085 Copyright notice: 0086 0087 (C) 1995-2013 Jean-loup Gailly and Mark Adler 0088 0089 This software is provided 'as-is', without any express or implied 0090 warranty. In no event will the authors be held liable for any damages 0091 arising from the use of this software. 0092 0093 Permission is granted to anyone to use this software for any purpose, 0094 including commercial applications, and to alter it and redistribute it 0095 freely, subject to the following restrictions: 0096 0097 1. The origin of this software must not be misrepresented; you must not 0098 claim that you wrote the original software. If you use this software 0099 in a product, an acknowledgment in the product documentation would be 0100 appreciated but is not required. 0101 2. Altered source versions must be plainly marked as such, and must not be 0102 misrepresented as being the original software. 0103 3. This notice may not be removed or altered from any source distribution. 0104 0105 Jean-loup Gailly Mark Adler 0106 email@example.com firstname.lastname@example.org 0107 0108 If you use the zlib library in a product, we would appreciate *not* receiving 0109 lengthy legal documents to sign. The sources are provided for free but without 0110 warranty of any kind. The library has been entirely written by Jean-loup 0111 Gailly and Mark Adler; it does not include third-party code. 0112 0113 If you redistribute modified sources, we would appreciate that you include in 0114 the file ChangeLog history information documenting your changes. Please read 0115 the FAQ for more information on the distribution of modified source versions.