     ZLIB(3)                                                             ZLIB(3)
                                     15 Jan 2017

     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, assuming that the standard library functions used
          are thread safe, such as memory allocation routines.  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 may be
          added later with the same stream interface.  Compression can be done
          in a single step if the buffers are large enough 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 the 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 test/example.c and test/minigzip.c, as well as
          other examples in the examples/ directory.  Changes to this version
          are documented in the file ChangeLog that accompanies the source.
          zlib is built in to many languages and operating systems, including
          but not limited to Java, Python, .NET, PHP, Perl, Ruby, Swift, and Go.
          An experimental package to read and write files in the .zip format,
          written on top of zlib by Gilles Vollant (info@winimage.com), is
          available at:

               http://www.winimage.com/zLibDll/minizip.html and also in the
               contrib/minizip directory of the main zlib source distribution.

     SEE ALSO
          The zlib web site can be found at:

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

               http://tools.ietf.org/html/rfc1950 (for the zlib header and
               trailer format)
               http://tools.ietf.org/html/rfc1951 (for the deflate compressed
               data format)
               http://tools.ietf.org/html/rfc1952 (for the gzip header and
               trailer format) 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:

                                        - 1 -      Formatted:  November 29, 2021

     ZLIB(3)                                                             ZLIB(3)
                                     15 Jan 2017

               http://marknelson.us/1997/01/01/zlib-engine/

     REPORTING PROBLEMS
          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:

               http://zlib.net/zlib_faq.html before asking for help.  Send
               questions and/or comments to zlib@gzip.org, or (for the Windows
               DLL version) to Gilles Vollant (info@winimage.com).

     AUTHORS AND LICENSE
          Version 1.2.11 Copyright (C) 1995-2017 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.  Permission is granted to
          anyone to use this software for any purpose, including commercial
          applications, and to alter it and redistribute it freely, subject to
          the following restrictions:

          0step].
             The origin of this software must not be misrepresented; you must
             not claim that you wrote the original software. If you use this
             software in a product, an acknowledgment in the product
             documentation would be appreciated but is not required.

          0step].
             Altered source versions must be plainly marked as such, and must
             not be misrepresented as being the original software.

          0step].
             This notice may not be removed or altered from any source
             distribution.  Jean-loup Gailly        Mark Adler
             jloup@gzip.org          madler@alumni.caltech.edu 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
             (rodgers@nlm.nih.gov).

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