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100 lines
3.6 KiB
100 lines
3.6 KiB
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Frequently Asked Questions about zlib
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If your question is not there, please check the zlib home page
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http://www.zlib.org which may have more recent information.
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The lastest zlib FAQ is at http://www.gzip.org/zlib/zlib_faq.html
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1. Is zlib Y2K-compliant?
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Yes. zlib doesn't handle dates.
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2. Where can I get a Windows DLL version?
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The zlib sources can be compiled without change to produce a DLL. If you
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want a precompiled DLL, see http://www.winimage.com/zLibDll/ . Questions
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about the zlib DLL should be sent to Gilles Vollant ([email protected]).
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3. Where can I get a Visual Basic interface to zlib?
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See
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* http://www.winimage.com/zLibDll/cmp-z-it.zip
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* http://www.dogma.net/markn/articles/zlibtool/zlibtool.htm
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* contrib/visual-basic.txt in the zlib distribution
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4. compress() returns Z_BUF_ERROR
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Make sure that before the call of compress, the length of the compressed
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buffer is equal to the total size of the compressed buffer and not
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zero. For Visual Basic, check that this parameter is passed by reference
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("as any"), not by value ("as long").
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5. deflate() or inflate() returns Z_BUF_ERROR
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Before making the call, make sure that avail_in and avail_out are not
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zero. When setting the parameter flush equal to Z_FINISH, also make sure
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that avail_out is big enough to allow processing all pending input.
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6. Where's the zlib documentation (man pages, etc.)?
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It's in zlib.h for the moment, and Francis S. Lin has converted it to a
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web page zlib.html. Volunteers to transform this to Unix-style man pages,
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please contact Jean-loup Gailly ([email protected]). Examples of zlib usage
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are in the files example.c and minigzip.c.
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7. Why don't you use GNU autoconf or libtool or ...?
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Because we would like to keep zlib as a very small and simple
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package. zlib is rather portable and doesn't need much configuration.
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8. I found a bug in zlib.
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Most of the time, such problems are due to an incorrect usage of
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zlib. Please try to reproduce the problem with a small program and send
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the corresponding source to us at [email protected] . Do not send
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multi-megabyte data files without prior agreement.
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9. Why do I get "undefined reference to gzputc"?
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If "make test" produces something like
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example.o(.text+0x154): undefined reference to `gzputc'
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check that you don't have old files libz.* in /usr/lib, /usr/local/lib or
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/usr/X11R6/lib. Remove any old versions, then do "make install".
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10. I need a Delphi interface to zlib.
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See the directories contrib/delphi and contrib/delphi2 in the zlib
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distribution.
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11. Can zlib handle .zip archives?
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See the directory contrib/minizip in the zlib distribution.
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12. Can zlib handle .Z files?
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No, sorry. You have to spawn an uncompress or gunzip subprocess, or adapt
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the code of uncompress on your own.
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13. How can I make a Unix shared library?
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make clean
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./configure -s
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make
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14. Why does "make test" fail on Mac OS X?
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Mac OS X already includes zlib as a shared library, and so -lz links the
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shared library instead of the one that the "make" compiled. For zlib
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1.1.3, the two are incompatible due to different compile-time
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options. Simply change the -lz in the Makefile to libz.a, and it will use
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the compiled library instead of the shared one and the "make test" will
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succeed.
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15. I have a question about OttoPDF
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We are not the authors of OttoPDF. The real author is on the OttoPDF web
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site Joel Hainley [email protected].
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