mirror of https://github.com/madler/zlib.git
You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
149 lines
4.4 KiB
149 lines
4.4 KiB
.TH ZLIB 3 "xx Jan 2017" |
|
.SH NAME |
|
zlib \- compression/decompression library |
|
.SH SYNOPSIS |
|
[see |
|
.I zlib.h |
|
for full description] |
|
.SH DESCRIPTION |
|
The |
|
.I 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. |
|
.LP |
|
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. |
|
.LP |
|
The library also supports reading and writing files in |
|
.IR gzip (1) |
|
(.gz) format |
|
with an interface similar to that of stdio. |
|
.LP |
|
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. |
|
.LP |
|
All functions of the compression library are documented in the file |
|
.IR zlib.h . |
|
The distribution source includes examples of use of the library |
|
in the files |
|
.I test/example.c |
|
and |
|
.IR test/minigzip.c, |
|
as well as other examples in the |
|
.IR examples/ |
|
directory. |
|
.LP |
|
Changes to this version are documented in the file |
|
.I ChangeLog |
|
that accompanies the source. |
|
.LP |
|
.I zlib |
|
is built in to many languages and operating systems, including but not limited to |
|
Java, Python, .NET, PHP, Perl, Ruby, Swift, and Go. |
|
.LP |
|
An experimental package to read and write files in the .zip format, |
|
written on top of |
|
.I zlib |
|
by Gilles Vollant (info@winimage.com), |
|
is available at: |
|
.IP |
|
http://www.winimage.com/zLibDll/minizip.html |
|
and also in the |
|
.I contrib/minizip |
|
directory of the main |
|
.I zlib |
|
source distribution. |
|
.SH "SEE ALSO" |
|
The |
|
.I zlib |
|
web site can be found at: |
|
.IP |
|
http://zlib.net/ |
|
.LP |
|
The data format used by the |
|
.I zlib |
|
library is described by RFC |
|
(Request for Comments) 1950 to 1952 in the files: |
|
.IP |
|
http://tools.ietf.org/html/rfc1950 (for the zlib header and trailer format) |
|
.br |
|
http://tools.ietf.org/html/rfc1951 (for the deflate compressed data format) |
|
.br |
|
http://tools.ietf.org/html/rfc1952 (for the gzip header and trailer format) |
|
.LP |
|
Mark Nelson wrote an article about |
|
.I zlib |
|
for the Jan. 1997 issue of Dr. Dobb's Journal; |
|
a copy of the article is available at: |
|
.IP |
|
http://marknelson.us/1997/01/01/zlib-engine/ |
|
.SH "REPORTING PROBLEMS" |
|
Before reporting a problem, |
|
please check the |
|
.I zlib |
|
web site to verify that you have the latest version of |
|
.IR zlib ; |
|
otherwise, |
|
obtain the latest version and see if the problem still exists. |
|
Please read the |
|
.I zlib |
|
FAQ at: |
|
.IP |
|
http://zlib.net/zlib_faq.html |
|
.LP |
|
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). |
|
.SH AUTHORS AND LICENSE |
|
Version 1.2.11.1 |
|
.LP |
|
Copyright (C) 1995-2017 Jean-loup Gailly and Mark Adler |
|
.LP |
|
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. |
|
.LP |
|
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: |
|
.LP |
|
.nr step 1 1 |
|
.IP \n[step]. 3 |
|
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. |
|
.IP \n+[step]. |
|
Altered source versions must be plainly marked as such, and must not be |
|
misrepresented as being the original software. |
|
.IP \n+[step]. |
|
This notice may not be removed or altered from any source distribution. |
|
.LP |
|
Jean-loup Gailly Mark Adler |
|
.br |
|
jloup@gzip.org madler@alumni.caltech.edu |
|
.LP |
|
The deflate format used by |
|
.I zlib |
|
was defined by Phil Katz. |
|
The deflate and |
|
.I zlib |
|
specifications were written by L. Peter Deutsch. |
|
Thanks to all the people who reported problems and suggested various |
|
improvements in |
|
.IR zlib ; |
|
who are too numerous to cite here. |
|
.LP |
|
UNIX manual page by R. P. C. Rodgers, |
|
U.S. National Library of Medicine (rodgers@nlm.nih.gov). |
|
.\" end of man page
|
|
|