| 1 |
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| 2 | Frequently Asked Questions about zlib
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| 3 |
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| 4 |
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| 5 | If your question is not there, please check the zlib home page
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| 6 | http://www.zlib.org which may have more recent information.
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| 7 | The lastest zlib FAQ is at http://www.gzip.org/zlib/zlib_faq.html
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| 8 |
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| 9 |
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| 10 | 1. Is zlib Y2K-compliant?
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| 11 |
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| 12 | Yes. zlib doesn't handle dates.
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| 13 |
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| 14 | 2. Where can I get a Windows DLL version?
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| 15 |
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| 16 | The zlib sources can be compiled without change to produce a DLL. If you
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| 17 | want a precompiled DLL, see http://www.winimage.com/zLibDll/ . Questions
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| 18 | about the zlib DLL should be sent to Gilles Vollant ([email protected]).
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| 19 |
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| 20 | 3. Where can I get a Visual Basic interface to zlib?
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| 21 |
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| 22 | See
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| 23 | * http://www.winimage.com/zLibDll/cmp-z-it.zip
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| 24 | * http://www.dogma.net/markn/articles/zlibtool/zlibtool.htm
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| 25 | * contrib/visual-basic.txt in the zlib distribution
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| 26 |
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| 27 | 4. compress() returns Z_BUF_ERROR
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| 28 |
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| 29 | Make sure that before the call of compress, the length of the compressed
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| 30 | buffer is equal to the total size of the compressed buffer and not
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| 31 | zero. For Visual Basic, check that this parameter is passed by reference
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| 32 | ("as any"), not by value ("as long").
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| 33 |
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| 34 | 5. deflate() or inflate() returns Z_BUF_ERROR
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| 35 |
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| 36 | Before making the call, make sure that avail_in and avail_out are not
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| 37 | zero. When setting the parameter flush equal to Z_FINISH, also make sure
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| 38 | that avail_out is big enough to allow processing all pending input.
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