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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 (info@winimage.com). |
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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 (jloup@gzip.org). 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 zlib@gzip.org . 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 jhainley@myndkryme.com.
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