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/src/zlib/README

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  1ZLIB DATA COMPRESSION LIBRARY
  2
  3zlib 1.2.8 is a general purpose data compression library.  All the code is
  4thread safe.  The data format used by the zlib library is described by RFCs
  5(Request for Comments) 1950 to 1952 in the files
  6http://tools.ietf.org/html/rfc1950 (zlib format), rfc1951 (deflate format) and
  7rfc1952 (gzip format).
  8
  9All functions of the compression library are documented in the file zlib.h
 10(volunteer to write man pages welcome, contact zlib@gzip.org).  A usage example
 11of the library is given in the file test/example.c which also tests that
 12the library is working correctly.  Another example is given in the file
 13test/minigzip.c.  The compression library itself is composed of all source
 14files in the root directory.
 15
 16To compile all files and run the test program, follow the instructions given at
 17the top of Makefile.in.  In short "./configure; make test", and if that goes
 18well, "make install" should work for most flavors of Unix.  For Windows, use
 19one of the special makefiles in win32/ or contrib/vstudio/ .  For VMS, use
 20make_vms.com.
 21
 22Questions about zlib should be sent to <zlib@gzip.org>, or to Gilles Vollant
 23<info@winimage.com> for the Windows DLL version.  The zlib home page is
 24http://zlib.net/ .  Before reporting a problem, please check this site to
 25verify that you have the latest version of zlib; otherwise get the latest
 26version and check whether the problem still exists or not.
 27
 28PLEASE read the zlib FAQ http://zlib.net/zlib_faq.html before asking for help.
 29
 30Mark Nelson <markn@ieee.org> wrote an article about zlib for the Jan.  1997
 31issue of Dr.  Dobb's Journal; a copy of the article is available at
 32http://marknelson.us/1997/01/01/zlib-engine/ .
 33
 34The changes made in version 1.2.8 are documented in the file ChangeLog.
 35
 36Unsupported third party contributions are provided in directory contrib/ .
 37
 38zlib is available in Java using the java.util.zip package, documented at
 39http://java.sun.com/developer/technicalArticles/Programming/compression/ .
 40
 41A Perl interface to zlib written by Paul Marquess <pmqs@cpan.org> is available
 42at CPAN (Comprehensive Perl Archive Network) sites, including
 43http://search.cpan.org/~pmqs/IO-Compress-Zlib/ .
 44
 45A Python interface to zlib written by A.M. Kuchling <amk@amk.ca> is
 46available in Python 1.5 and later versions, see
 47http://docs.python.org/library/zlib.html .
 48
 49zlib is built into tcl: http://wiki.tcl.tk/4610 .
 50
 51An experimental package to read and write files in .zip format, written on top
 52of zlib by Gilles Vollant <info@winimage.com>, is available in the
 53contrib/minizip directory of zlib.
 54
 55
 56Notes for some targets:
 57
 58- For Windows DLL versions, please see win32/DLL_FAQ.txt
 59
 60- For 64-bit Irix, deflate.c must be compiled without any optimization. With
 61  -O, one libpng test fails. The test works in 32 bit mode (with the -n32
 62  compiler flag). The compiler bug has been reported to SGI.
 63
 64- zlib doesn't work with gcc 2.6.3 on a DEC 3000/300LX under OSF/1 2.1 it works
 65  when compiled with cc.
 66
 67- On Digital Unix 4.0D (formely OSF/1) on AlphaServer, the cc option -std1 is
 68  necessary to get gzprintf working correctly. This is done by configure.
 69
 70- zlib doesn't work on HP-UX 9.05 with some versions of /bin/cc. It works with
 71  other compilers. Use "make test" to check your compiler.
 72
 73- gzdopen is not supported on RISCOS or BEOS.
 74
 75- For PalmOs, see http://palmzlib.sourceforge.net/
 76
 77
 78Acknowledgments:
 79
 80  The deflate format used by zlib was defined by Phil Katz.  The deflate and
 81  zlib specifications were written by L.  Peter Deutsch.  Thanks to all the
 82  people who reported problems and suggested various improvements in zlib; they
 83  are too numerous to cite here.
 84
 85Copyright notice:
 86
 87 (C) 1995-2013 Jean-loup Gailly and Mark Adler
 88
 89  This software is provided 'as-is', without any express or implied
 90  warranty.  In no event will the authors be held liable for any damages
 91  arising from the use of this software.
 92
 93  Permission is granted to anyone to use this software for any purpose,
 94  including commercial applications, and to alter it and redistribute it
 95  freely, subject to the following restrictions:
 96
 97  1. The origin of this software must not be misrepresented; you must not
 98     claim that you wrote the original software. If you use this software
 99     in a product, an acknowledgment in the product documentation would be
100     appreciated but is not required.
101  2. Altered source versions must be plainly marked as such, and must not be
102     misrepresented as being the original software.
103  3. This notice may not be removed or altered from any source distribution.
104
105  Jean-loup Gailly        Mark Adler
106  jloup@gzip.org          madler@alumni.caltech.edu
107
108If you use the zlib library in a product, we would appreciate *not* receiving
109lengthy legal documents to sign.  The sources are provided for free but without
110warranty of any kind.  The library has been entirely written by Jean-loup
111Gailly and Mark Adler; it does not include third-party code.
112
113If you redistribute modified sources, we would appreciate that you include in
114the file ChangeLog history information documenting your changes.  Please read
115the FAQ for more information on the distribution of modified source versions.