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ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4. The directory name has changed: no version number in the expanded directory now.
author Franz Glasner <fzglas.hg@dom66.de>
date Mon, 15 Sep 2025 11:43:07 +0200
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1 .TH ZLIB 3 "22 Jan 2024"
2 .SH NAME
3 zlib \- compression/decompression library
4 .SH SYNOPSIS
5 [see
6 .I zlib.h
7 for full description]
8 .SH DESCRIPTION
9 The
10 .I zlib
11 library is a general purpose data compression library.
12 The code is thread safe, assuming that the standard library functions
13 used are thread safe, such as memory allocation routines.
14 It provides in-memory compression and decompression functions,
15 including integrity checks of the uncompressed data.
16 This version of the library supports only one compression method (deflation)
17 but other algorithms may be added later
18 with the same stream interface.
19 .LP
20 Compression can be done in a single step if the buffers are large enough
21 or can be done by repeated calls of the compression function.
22 In the latter case,
23 the application must provide more input and/or consume the output
24 (providing more output space) before each call.
25 .LP
26 The library also supports reading and writing files in
27 .IR gzip (1)
28 (.gz) format
29 with an interface similar to that of stdio.
30 .LP
31 The library does not install any signal handler.
32 The decoder checks the consistency of the compressed data,
33 so the library should never crash even in the case of corrupted input.
34 .LP
35 All functions of the compression library are documented in the file
36 .IR zlib.h .
37 The distribution source includes examples of use of the library
38 in the files
39 .I test/example.c
40 and
41 .IR test/minigzip.c,
42 as well as other examples in the
43 .IR examples/
44 directory.
45 .LP
46 Changes to this version are documented in the file
47 .I ChangeLog
48 that accompanies the source.
49 .LP
50 .I zlib
51 is built in to many languages and operating systems, including but not limited to
52 Java, Python, .NET, PHP, Perl, Ruby, Swift, and Go.
53 .LP
54 An experimental package to read and write files in the .zip format,
55 written on top of
56 .I zlib
57 by Gilles Vollant (info@winimage.com),
58 is available at:
59 .IP
60 http://www.winimage.com/zLibDll/minizip.html
61 and also in the
62 .I contrib/minizip
63 directory of the main
64 .I zlib
65 source distribution.
66 .SH "SEE ALSO"
67 The
68 .I zlib
69 web site can be found at:
70 .IP
71 http://zlib.net/
72 .LP
73 The data format used by the
74 .I zlib
75 library is described by RFC
76 (Request for Comments) 1950 to 1952 in the files:
77 .IP
78 http://tools.ietf.org/html/rfc1950 (for the zlib header and trailer format)
79 .br
80 http://tools.ietf.org/html/rfc1951 (for the deflate compressed data format)
81 .br
82 http://tools.ietf.org/html/rfc1952 (for the gzip header and trailer format)
83 .LP
84 Mark Nelson wrote an article about
85 .I zlib
86 for the Jan. 1997 issue of Dr. Dobb's Journal;
87 a copy of the article is available at:
88 .IP
89 http://marknelson.us/1997/01/01/zlib-engine/
90 .SH "REPORTING PROBLEMS"
91 Before reporting a problem,
92 please check the
93 .I zlib
94 web site to verify that you have the latest version of
95 .IR zlib ;
96 otherwise,
97 obtain the latest version and see if the problem still exists.
98 Please read the
99 .I zlib
100 FAQ at:
101 .IP
102 http://zlib.net/zlib_faq.html
103 .LP
104 before asking for help.
105 Send questions and/or comments to zlib@gzip.org,
106 or (for the Windows DLL version) to Gilles Vollant (info@winimage.com).
107 .SH AUTHORS AND LICENSE
108 Version 1.3.1
109 .LP
110 Copyright (C) 1995-2024 Jean-loup Gailly and Mark Adler
111 .LP
112 This software is provided 'as-is', without any express or implied
113 warranty. In no event will the authors be held liable for any damages
114 arising from the use of this software.
115 .LP
116 Permission is granted to anyone to use this software for any purpose,
117 including commercial applications, and to alter it and redistribute it
118 freely, subject to the following restrictions:
119 .LP
120 .nr step 1 1
121 .IP \n[step]. 3
122 The origin of this software must not be misrepresented; you must not
123 claim that you wrote the original software. If you use this software
124 in a product, an acknowledgment in the product documentation would be
125 appreciated but is not required.
126 .IP \n+[step].
127 Altered source versions must be plainly marked as such, and must not be
128 misrepresented as being the original software.
129 .IP \n+[step].
130 This notice may not be removed or altered from any source distribution.
131 .LP
132 Jean-loup Gailly Mark Adler
133 .br
134 jloup@gzip.org madler@alumni.caltech.edu
135 .LP
136 The deflate format used by
137 .I zlib
138 was defined by Phil Katz.
139 The deflate and
140 .I zlib
141 specifications were written by L. Peter Deutsch.
142 Thanks to all the people who reported problems and suggested various
143 improvements in
144 .IR zlib ;
145 who are too numerous to cite here.
146 .LP
147 UNIX manual page by R. P. C. Rodgers,
148 U.S. National Library of Medicine (rodgers@nlm.nih.gov).
149 .\" end of man page