| [17314] | 1 | .TH ZLIB 3 "11 March 2002" |
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| [15210] | 2 | .SH NAME |
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| 3 | zlib \- compression/decompression library |
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| 4 | .SH SYNOPSIS |
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| 5 | [see |
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| 6 | .I zlib.h |
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| 7 | for full description] |
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| 8 | .SH DESCRIPTION |
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| 9 | The |
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| 10 | .I zlib |
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| 11 | library is a general purpose data compression library. |
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| 12 | The code is thread safe. |
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| 13 | It provides in-memory compression and decompression functions, |
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| 14 | including integrity checks of the uncompressed data. |
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| 15 | This version of the library supports only one compression method (deflation) |
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| 16 | but other algorithms will be added later and will have the same stream interface. |
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| 17 | .LP |
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| 18 | Compression can be done in a single step if the buffers are large enough |
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| 19 | (for example if an input file is mmap'ed), |
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| 20 | or can be done by repeated calls of the compression function. |
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| 21 | In the latter case, |
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| 22 | the application must provide more input and/or consume the output |
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| 23 | (providing more output space) before each call. |
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| 24 | .LP |
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| 25 | The library also supports reading and writing files in |
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| 26 | .I gzip |
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| 27 | (.gz) format |
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| 28 | with an interface similar to that of stdio. |
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| 29 | .LP |
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| 30 | The library does not install any signal handler. The decoder checks |
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| 31 | the consistency of the compressed data, so the library should never |
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| 32 | crash even in case of corrupted input. |
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| 33 | .LP |
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| 34 | All functions of the compression library are documented in the file |
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| 35 | .IR zlib.h. |
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| 36 | The distribution source includes examples of use of the library |
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| 37 | the files |
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| 38 | .I example.c |
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| 39 | and |
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| 40 | .IR minigzip.c . |
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| 41 | .LP |
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| 42 | A Java implementation of |
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| 43 | .IR zlib |
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| 44 | is available in the Java Development Kit 1.1 |
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| 45 | .IP |
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| 46 | http://www.javasoft.com/products/JDK/1.1/docs/api/Package-java.util.zip.html |
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| 47 | .LP |
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| 48 | A Perl interface to |
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| 49 | .IR zlib , |
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| 50 | written by Paul Marquess (pmarquess@bfsec.bt.co.uk) |
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| 51 | is available at CPAN (Comprehensive Perl Archive Network) sites, |
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| 52 | such as: |
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| 53 | .IP |
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| 54 | ftp://ftp.cis.ufl.edu/pub/perl/CPAN/modules/by-module/Compress/Compress-Zlib* |
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| 55 | .LP |
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| 56 | A Python interface to |
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| 57 | .IR zlib |
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| 58 | written by A.M. Kuchling <amk@magnet.com> |
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| 59 | is available from the Python Software Association sites, such as: |
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| 60 | .IP |
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| 61 | ftp://ftp.python.org/pub/python/contrib/Encoding/zlib*.tar.gz |
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| 62 | .SH "SEE ALSO" |
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| 63 | Questions about zlib should be sent to: |
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| 64 | .IP |
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| 65 | zlib@quest.jpl.nasa.gov |
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| 66 | or, if this fails, to the author addresses given below. |
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| 67 | The zlib home page is: |
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| 68 | .IP |
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| 69 | http://www.cdrom.com/pub/infozip/zlib/ |
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| 70 | .LP |
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| 71 | The data format used by the zlib library is described by RFC |
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| 72 | (Request for Comments) 1950 to 1952 in the files: |
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| 73 | .IP |
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| 74 | ftp://ds.internic.net/rfc/rfc1950.txt (zlib format) |
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| 75 | .br |
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| 76 | rfc1951.txt (deflate format) |
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| 77 | .br |
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| 78 | rfc1952.txt (gzip format) |
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| 79 | .LP |
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| 80 | These documents are also available in other formats from: |
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| 81 | .IP |
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| 82 | ftp://ftp.uu.net/graphics/png/documents/zlib/zdoc-index.html |
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| 83 | .SH AUTHORS |
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| [17314] | 84 | Version 1.1.4 |
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| 85 | Copyright (C) 1995-2002 Jean-loup Gailly (jloup@gzip.org) |
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| [15210] | 86 | and Mark Adler (madler@alumni.caltech.edu). |
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| 87 | .LP |
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| 88 | This software is provided "as-is," |
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| 89 | without any express or implied warranty. |
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| 90 | In no event will the authors be held liable for any damages |
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| 91 | arising from the use of this software. |
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| 92 | See the distribution directory with respect to requirements |
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| 93 | governing redistribution. |
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| 94 | The deflate format used by |
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| 95 | .I zlib |
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| 96 | was defined by Phil Katz. |
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| 97 | The deflate and |
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| 98 | .I zlib |
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| 99 | specifications were written by L. Peter Deutsch. |
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| 100 | Thanks to all the people who reported problems and suggested various |
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| 101 | improvements in |
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| 102 | .IR zlib ; |
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| 103 | who are too numerous to cite here. |
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| 104 | .LP |
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| 105 | UNIX manual page by R. P. C. Rodgers, |
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| 106 | U.S. National Library of Medicine (rodgers@nlm.nih.gov). |
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| 107 | .\" end of man page |
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