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1 perry 1 ZLIB
2 !!!ZLIB
3 NAME
4 SYNOPSIS
5 DESCRIPTION
6 SEE ALSO
7 AUTHORS
8 ----
9 !!NAME
10
11
12 zlib - compression/decompression library
13 !!SYNOPSIS
14
15
16 [[see ''zlib.h'' for full description]
17 !!DESCRIPTION
18
19
20 The ''zlib'' library is a general purpose data
21 compression library. The code is thread safe. It provides
22 in-memory compression and decompression functions, including
23 integrity checks of the uncompressed data. This version of
24 the library supports only one compression method (deflation)
25 but other algorithms will be added later and will have the
26 same stream interface.
27
28
29 Compression can be done in a single step if the buffers are
30 large enough (for example if an input file is mmap'ed), or
31 can be done by repeated calls of the compression function.
32 In the latter case, the application must provide more input
33 and/or consume the output (providing more output space)
34 before each call.
35
36
37 The library also supports reading and writing files in
38 ''gzip'' (.gz) format with an interface similar to that
39 of stdio.
40
41
42 The library does not install any signal handler. The decoder
43 checks the consistency of the compressed data, so the
44 library should never crash even in case of corrupted
45 input.
46
47
48 All functions of the compression library are documented in
49 the file ''zlib.h.'' The distribution source includes
50 examples of use of the library the files ''example.c''
51 and ''minigzip.c''.
52
53
54 A Java implementation of ''zlib'' is available in the
55 Java Development Kit 1.1
56
57
58 http://www.javasoft.com/products/JDK/1.1/docs/api/Package-java.util.zip.html
59
60
61 A Perl interface to ''zlib'', written by Paul Marquess
62 (pmarquess@bfsec.bt.co.uk) is available at CPAN
63 (Comprehensive Perl Archive Network) sites, such
64 as:
65
66
67 ftp://ftp.cis.ufl.edu/pub/perl/CPAN/modules/by-module/Compress/Compress-Zlib*
68
69
70 A Python interface to ''zlib'' written by A.M. Kuchling
71 ''
72
73
74 ftp://ftp.python.org/pub/python/contrib/Encoding/zlib*.tar.gz
75 !!SEE ALSO
76
77
78 Questions about zlib should be sent to:
79
80
81 zlib@quest.jpl.nasa.gov or, if this fails, to the author
82 addresses given below. The zlib home page is:
83
84
85 http://www.cdrom.com/pub/infozip/zlib/
86
87
88 The data format used by the zlib library is described by RFC
89 (Request for Comments) 1950 to 1952 in the
90 files:
91
92
93 ftp://ds.internic.net/rfc/rfc1950.txt (zlib format)
94 rfc1951.txt (deflate format)
95 rfc1952.txt (gzip format)
96
97
98 These documents are also available in other formats
99 from:
100
101
102 ftp://ftp.uu.net/graphics/png/documents/zlib/zdoc-index.html
103 !!AUTHORS
104
105
106 Version 1.1.4 Copyright (C) 1995-2002 Jean-loup Gailly
107 (jloup@gzip.org) and Mark Adler
108 (madler@alumni.caltech.edu).
109
110
111 This software is provided
112 zlib'' was defined by Phil Katz. The deflate
113 and ''zlib'' specifications were written by L. Peter
114 Deutsch. Thanks to all the people who reported problems and
115 suggested various improvements in ''zlib''; who are too
116 numerous to cite here.
117
118
119 UNIX manual page by R. P. C. Rodgers, U.S. National Library
120 of Medicine (rodgers@nlm.nih.gov).
121 ----
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