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