1 | .TH ZLIB 3 "9 July 1998" |
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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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84 | Version 1.1.3 |
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85 | Copyright (C) 1995-1998 Jean-loup Gailly (jloup@gzip.org) |
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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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