Provided by: zlib1g-dev_1.2.3.4.dfsg-3ubuntu4_amd64 bug


       zlib - compression/decompression library


       [see zlib.h for full 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

       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(1)  (.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
       distribution  source  includes  examples  of use of the library in the files example.c and

       Changes to this version are documented in the file ChangeLog that accompanies the  source,
       and are concerned primarily with bug fixes and portability enhancements.

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


       A  Perl  interface to zlib, written by Paul Marquess (, is available at CPAN
       (Comprehensive Perl Archive Network) sites, including:


       A Python interface to zlib, written by A.M. Kuchling  (,  is  available  in
       Python 1.5 and later versions:


       A  zlib  binding  for  tcl(1),  written  by  Andreas  Kupries  (, is
       availlable at:


       An experimental package to read and write files in .zip format, written on top of zlib  by
       Gilles Vollant (, is available at:

       and   also   in   the  contrib/minizip
              directory of the main zlib web site.


       The zlib web site can be found at either of these locations:


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

     (concerning zlib format)
     (concerning deflate format)
     (concerning gzip format)

       These documents are also available in other formats from:


       Mark  Nelson  ( wrote an article about zlib for the Jan. 1997 issue of  Dr.
       Dobb's Journal; a copy of the article is available at:



       Before reporting a problem, please check the zlib web site to verify  that  you  have  the
       latest  version of zlib; otherwise, obtain the latest version and see if the problem still
       exists.  Please read the zlib FAQ at:


       before asking for help.  Send questions and/or comments  to,  or  (for  the
       Windows DLL version) to Gilles Vollant (


       Version  Copyright (C) 1995-2006 Jean-loup Gailly ( and Mark Adler

       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
       suggested 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

                                         21 December 2009                                 ZLIB(3)