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ZLIB(3) 										  ZLIB(3)

NAME
       zlib - compression/decompression library

SYNOPSIS
       [see zlib.h for full description]

DESCRIPTION
       The  zlib library is a general purpose data compression library.  The code is thread safe.
       It provides in-memory compression and decompression functions, including integrity  checks
       of  the	uncompressed  data.   This  version  of the library supports only one compression
       method (deflation) but other algorithms will be added later and will have the same  stream
       interface.

       Compression  can  be done in a single step if the buffers are large enough (for example if
       an input file is mmap'ed), or can be done by repeated calls of the  compression	function.
       In  the	latter	case,  the  application must provide more input and/or consume the output
       (providing more output space) before each call.

       The library also supports reading and writing files in gzip (.gz) format with an interface
       similar to that of stdio.

       The library does not install any signal handler. The decoder checks the consistency of the
       compressed data, so the library should never crash even in case of corrupted input.

       All functions of the compression library are documented in the file zlib.h.  The distribu-
       tion source includes examples of use of the library the files example.c and minigzip.c.

       A Java implementation of zlib is available in the Java Development Kit 1.1

	      http://www.javasoft.com/products/JDK/1.1/docs/api/Package-java.util.zip.html

       A Perl interface to zlib, written by Paul Marquess (pmarquess@bfsec.bt.co.uk) is available
       at CPAN (Comprehensive Perl Archive Network) sites, such as:

	      ftp://ftp.cis.ufl.edu/pub/perl/CPAN/modules/by-module/Compress/Compress-Zlib*

       A Python interface to zlib written by A.M. Kuchling <amk@magnet.com> is available from the
       Python Software Association sites, such as:

	      ftp://ftp.python.org/pub/python/contrib/Encoding/zlib*.tar.gz

SEE ALSO
       Questions about zlib should be sent to:

	      zlib@quest.jpl.nasa.gov  or,  if	this  fails, to the author addresses given below.
	      The zlib home page is:

	      http://www.cdrom.com/pub/infozip/zlib/

       The data format used by the zlib library is described by RFC (Request for  Comments)  1950
       to 1952 in the files:

	      ftp://ds.internic.net/rfc/rfc1950.txt (zlib format)
	      rfc1951.txt (deflate format)
	      rfc1952.txt (gzip format)

       These documents are also available in other formats from:

	      ftp://ftp.uu.net/graphics/png/documents/zlib/zdoc-index.html

AUTHORS
       Version	1.1.4  Copyright  (C)  1995-2002 Jean-loup Gailly (jloup@gzip.org) and Mark Adler
       (madler@alumni.caltech.edu).

       This software is provided "as-is," without any express or implied warranty.  In	no  event
       will  the  authors  be  held liable for any damages arising from the use of this software.
       See the distribution directory with respect to requirements governing redistribution.  The
       deflate format used by zlib was defined by Phil Katz.  The deflate and zlib specifications
       were written by L. Peter Deutsch.  Thanks to all the people who reported problems and sug-
       gested various improvements in zlib; who are too numerous to cite here.

       UNIX   manual   page   by   R.	P.   C.   Rodgers,  U.S.  National  Library  of  Medicine
       (rodgers@nlm.nih.gov).

					  11 March 2002 				  ZLIB(3)
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