ZLIB(3) 						     Library Functions Manual							   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, 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 available in Java using the java.util.zip package:

	      http://java.sun.com/developer/technicalArticles/Programming/compression/

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

	      http://search.cpan.org/~pmqs/IO-Compress-Zlib/

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

	      http://docs.python.org/library/zlib.html

       zlib is built into tcl:

	      http://wiki.tcl.tk/4610

       An experimental package to read and write files in .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:

	      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@winim-
       age.com).

AUTHORS

       Version 1.2.7 Copyright (C) 1995-2012 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 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).

								    2 May 2012								   ZLIB(3)