| README (92111) | README (131377) |
|---|---|
| 1zlib 1.1.4 is a general purpose data compression library. All the code 2is thread safe. The data format used by the zlib library 3is described by RFCs (Request for Comments) 1950 to 1952 in the files 4http://www.ietf.org/rfc/rfc1950.txt (zlib format), rfc1951.txt (deflate 5format) and rfc1952.txt (gzip format). These documents are also available in 6other formats from ftp://ftp.uu.net/graphics/png/documents/zlib/zdoc-index.html | 1ZLIB DATA COMPRESSION LIBRARY |
| 7 | 2 |
| 3zlib 1.2.1 is a general purpose data compression library. All the code is 4thread safe. The data format used by the zlib library is described by RFCs 5(Request for Comments) 1950 to 1952 in the files 6http://www.ietf.org/rfc/rfc1950.txt (zlib format), rfc1951.txt (deflate format) 7and rfc1952.txt (gzip format). These documents are also available in other 8formats from ftp://ftp.uu.net/graphics/png/documents/zlib/zdoc-index.html 9 |
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| 8All functions of the compression library are documented in the file zlib.h | 10All functions of the compression library are documented in the file zlib.h |
| 9(volunteer to write man pages welcome, contact jloup@gzip.org). A usage 10example of the library is given in the file example.c which also tests that 11the library is working correctly. Another example is given in the file 12minigzip.c. The compression library itself is composed of all source files 13except example.c and minigzip.c. | 11(volunteer to write man pages welcome, contact zlib@gzip.org). A usage example 12of the library is given in the file example.c which also tests that the library 13is working correctly. Another example is given in the file minigzip.c. The 14compression library itself is composed of all source files except example.c and 15minigzip.c. |
| 14 | 16 |
| 15To compile all files and run the test program, follow the instructions 16given at the top of Makefile. In short "make test; make install" 17should work for most machines. For Unix: "./configure; make test; make install" 18For MSDOS, use one of the special makefiles such as Makefile.msc. 19For VMS, use Make_vms.com or descrip.mms. | 17To compile all files and run the test program, follow the instructions given at 18the top of Makefile. In short "make test; make install" should work for most 19machines. For Unix: "./configure; make test; make install" For MSDOS, use one 20of the special makefiles such as Makefile.msc. For VMS, use Make_vms.com or 21descrip.mms. |
| 20 | 22 |
| 21Questions about zlib should be sent to 22Gilles Vollant <info@winimage.com> for the Windows DLL version. 23The zlib home page is http://www.zlib.org or http://www.gzip.org/zlib/ 24Before reporting a problem, please check this site to verify that 25you have the latest version of zlib; otherwise get the latest version and 26check whether the problem still exists or not. | 23Questions about zlib should be sent to <zlib@gzip.org>, or to Gilles Vollant 24<info@winimage.com> for the Windows DLL version. The zlib home page is 25http://www.zlib.org or http://www.gzip.org/zlib/ Before reporting a problem, 26please check this site to verify that you have the latest version of zlib; 27otherwise get the latest version and check whether the problem still exists or 28not. |
| 27 | 29 |
| 28PLEASE read the zlib FAQ http://www.gzip.org/zlib/zlib_faq.html 29before asking for help. | 30PLEASE read the zlib FAQ http://www.gzip.org/zlib/zlib_faq.html before asking 31for help. |
| 30 31Mark Nelson <markn@ieee.org> wrote an article about zlib for the Jan. 1997 32issue of Dr. Dobb's Journal; a copy of the article is available in 33http://dogma.net/markn/articles/zlibtool/zlibtool.htm 34 | 32 33Mark Nelson <markn@ieee.org> wrote an article about zlib for the Jan. 1997 34issue of Dr. Dobb's Journal; a copy of the article is available in 35http://dogma.net/markn/articles/zlibtool/zlibtool.htm 36 |
| 35The changes made in version 1.1.4 are documented in the file ChangeLog. 36The only changes made since 1.1.3 are bug corrections: | 37The changes made in version 1.2.1 are documented in the file ChangeLog. |
| 37 | 38 |
| 38- ZFREE was repeated on same allocation on some error conditions. 39 This creates a security problem described in 40 http://www.zlib.org/advisory-2002-03-11.txt 41- Returned incorrect error (Z_MEM_ERROR) on some invalid data 42- Avoid accesses before window for invalid distances with inflate window 43 less than 32K. 44- force windowBits > 8 to avoid a bug in the encoder for a window size 45 of 256 bytes. (A complete fix will be available in 1.1.5). 46 47The beta version 1.1.5beta includes many more changes. A new official 48version 1.1.5 will be released as soon as extensive testing has been 49completed on it. 50 51 | |
| 52Unsupported third party contributions are provided in directory "contrib". 53 54A Java implementation of zlib is available in the Java Development Kit | 39Unsupported third party contributions are provided in directory "contrib". 40 41A Java implementation of zlib is available in the Java Development Kit |
| 55http://www.javasoft.com/products/JDK/1.1/docs/api/Package-java.util.zip.html | 42http://java.sun.com/j2se/1.4.2/docs/api/java/util/zip/package-summary.html |
| 56See the zlib home page http://www.zlib.org for details. 57 | 43See the zlib home page http://www.zlib.org for details. 44 |
| 58A Perl interface to zlib written by Paul Marquess <pmarquess@bfsec.bt.co.uk> 59is in the CPAN (Comprehensive Perl Archive Network) sites | 45A Perl interface to zlib written by Paul Marquess <pmqs@cpan.org> is in the 46CPAN (Comprehensive Perl Archive Network) sites |
| 60http://www.cpan.org/modules/by-module/Compress/ 61 | 47http://www.cpan.org/modules/by-module/Compress/ 48 |
| 62A Python interface to zlib written by A.M. Kuchling 63is available in Python 1.5 and later versions, see | 49A Python interface to zlib written by A.M. Kuchling <amk@magnet.com> is 50available in Python 1.5 and later versions, see |
| 64http://www.python.org/doc/lib/module-zlib.html 65 | 51http://www.python.org/doc/lib/module-zlib.html 52 |
| 66A zlib binding for TCL written by Andreas Kupries 67is availlable at http://www.westend.com/~kupries/doc/trf/man/man.html | 53A zlib binding for TCL written by Andreas Kupries <a.kupries@westend.com> is 54availlable at http://www.oche.de/~akupries/soft/trf/trf_zip.html |
| 68 | 55 |
| 69An experimental package to read and write files in .zip format, 70written on top of zlib by Gilles Vollant <info@winimage.com>, is 71available at http://www.winimage.com/zLibDll/unzip.html 72and also in the contrib/minizip directory of zlib. | 56An experimental package to read and write files in .zip format, written on top 57of zlib by Gilles Vollant <info@winimage.com>, is available in the 58contrib/minizip directory of zlib. |
| 73 74 75Notes for some targets: 76 | 59 60 61Notes for some targets: 62 |
| 77- To build a Windows DLL version, include in a DLL project zlib.def, zlib.rc 78 and all .c files except example.c and minigzip.c; compile with -DZLIB_DLL 79 The zlib DLL support was initially done by Alessandro Iacopetti and is 80 now maintained by Gilles Vollant <info@winimage.com>. Check the zlib DLL 81 home page at http://www.winimage.com/zLibDll | 63- For Windows DLL versions, please see win32/DLL_FAQ.txt |
| 82 | 64 |
| 83 From Visual Basic, you can call the DLL functions which do not take 84 a structure as argument: compress, uncompress and all gz* functions. 85 See contrib/visual-basic.txt for more information, or get 86 http://www.tcfb.com/dowseware/cmp-z-it.zip | 65- For 64-bit Irix, deflate.c must be compiled without any optimization. With 66 -O, one libpng test fails. The test works in 32 bit mode (with the -n32 67 compiler flag). The compiler bug has been reported to SGI. |
| 87 | 68 |
| 88- For 64-bit Irix, deflate.c must be compiled without any optimization. 89 With -O, one libpng test fails. The test works in 32 bit mode (with 90 the -n32 compiler flag). The compiler bug has been reported to SGI. | 69- zlib doesn't work with gcc 2.6.3 on a DEC 3000/300LX under OSF/1 2.1 it works 70 when compiled with cc. |
| 91 | 71 |
| 92- zlib doesn't work with gcc 2.6.3 on a DEC 3000/300LX under OSF/1 2.1 93 it works when compiled with cc. | 72- On Digital Unix 4.0D (formely OSF/1) on AlphaServer, the cc option -std1 is 73 necessary to get gzprintf working correctly. This is done by configure. |
| 94 | 74 |
| 95- on Digital Unix 4.0D (formely OSF/1) on AlphaServer, the cc option -std1 96 is necessary to get gzprintf working correctly. This is done by configure. | 75- zlib doesn't work on HP-UX 9.05 with some versions of /bin/cc. It works with 76 other compilers. Use "make test" to check your compiler. |
| 97 | 77 |
| 98- zlib doesn't work on HP-UX 9.05 with some versions of /bin/cc. It works 99 with other compilers. Use "make test" to check your compiler. 100 | |
| 101- gzdopen is not supported on RISCOS, BEOS and by some Mac compilers. 102 | 78- gzdopen is not supported on RISCOS, BEOS and by some Mac compilers. 79 |
| 103- For Turbo C the small model is supported only with reduced performance to 104 avoid any far allocation; it was tested with -DMAX_WBITS=11 -DMAX_MEM_LEVEL=3 | 80- For PalmOs, see http://palmzlib.sourceforge.net/ |
| 105 | 81 |
| 106- For PalmOs, see http://www.cs.uit.no/~perm/PASTA/pilot/software.html 107 Per Harald Myrvang <perm@stud.cs.uit.no> | 82- When building a shared, i.e. dynamic library on Mac OS X, the library must be 83 installed before testing (do "make install" before "make test"), since the 84 library location is specified in the library. |
| 108 109 110Acknowledgments: 111 112 The deflate format used by zlib was defined by Phil Katz. The deflate 113 and zlib specifications were written by L. Peter Deutsch. Thanks to all the 114 people who reported problems and suggested various improvements in zlib; 115 they are too numerous to cite here. 116 117Copyright notice: 118 | 85 86 87Acknowledgments: 88 89 The deflate format used by zlib was defined by Phil Katz. The deflate 90 and zlib specifications were written by L. Peter Deutsch. Thanks to all the 91 people who reported problems and suggested various improvements in zlib; 92 they are too numerous to cite here. 93 94Copyright notice: 95 |
| 119 (C) 1995-2002 Jean-loup Gailly and Mark Adler | 96 (C) 1995-2003 Jean-loup Gailly and Mark Adler |
| 120 121 This software is provided 'as-is', without any express or implied 122 warranty. In no event will the authors be held liable for any damages 123 arising from the use of this software. 124 125 Permission is granted to anyone to use this software for any purpose, 126 including commercial applications, and to alter it and redistribute it 127 freely, subject to the following restrictions: --- 11 unchanged lines hidden (view full) --- 139 140If you use the zlib library in a product, we would appreciate *not* 141receiving lengthy legal documents to sign. The sources are provided 142for free but without warranty of any kind. The library has been 143entirely written by Jean-loup Gailly and Mark Adler; it does not 144include third-party code. 145 146If you redistribute modified sources, we would appreciate that you include | 97 98 This software is provided 'as-is', without any express or implied 99 warranty. In no event will the authors be held liable for any damages 100 arising from the use of this software. 101 102 Permission is granted to anyone to use this software for any purpose, 103 including commercial applications, and to alter it and redistribute it 104 freely, subject to the following restrictions: --- 11 unchanged lines hidden (view full) --- 116 117If you use the zlib library in a product, we would appreciate *not* 118receiving lengthy legal documents to sign. The sources are provided 119for free but without warranty of any kind. The library has been 120entirely written by Jean-loup Gailly and Mark Adler; it does not 121include third-party code. 122 123If you redistribute modified sources, we would appreciate that you include |
| 147in the file ChangeLog history information documenting your changes. | 124in the file ChangeLog history information documenting your changes. Please 125read the FAQ for more information on the distribution of modified source 126versions. |