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Diffstat (limited to 'zlib/FAQ')
| -rw-r--r-- | zlib/FAQ | 108 |
1 files changed, 68 insertions, 40 deletions
@@ -3,70 +3,98 @@ If your question is not there, please check the zlib home page -http://www.cdrom.com/pub/infozip/zlib/ which may have more recent information. +http://www.zlib.org which may have more recent information. +The lastest zlib FAQ is at http://www.gzip.org/zlib/zlib_faq.html -1) I need a Windows DLL -2) I need a Visual Basic interface to zlib -3) compress() returns Z_BUF_ERROR -4) deflate or inflate returns Z_BUF_ERROR -5) Where is the zlib documentation (man pages, etc...)? -6) Why don't you use GNU autoconf, libtool, etc...? -7) There is a bug in zlib. -8) I get "undefined reference to gzputc" + 1. Is zlib Y2K-compliant? + Yes. zlib doesn't handle dates. + 2. Where can I get a Windows DLL version? -1) I need a Windows DLL + The zlib sources can be compiled without change to produce a DLL. If you + want a precompiled DLL, see http://www.winimage.com/zLibDll/ . Questions + about the zlib DLL should be sent to Gilles Vollant (info@winimage.com). - The zlib sources can be compiled without change to produce a DLL. - If you want a precompiled DLL, see http://www.winimage.com/zLibDll + 3. Where can I get a Visual Basic interface to zlib? + See + * http://www.winimage.com/zLibDll/cmp-z-it.zip + * http://www.dogma.net/markn/articles/zlibtool/zlibtool.htm + * contrib/visual-basic.txt in the zlib distribution -2) I need a Visual Basic interface to zlib + 4. compress() returns Z_BUF_ERROR - See http://www.tcfb.com/dowseware/cmp-z-it.zip - http://web2.airmail.net/markn/articles/zlibtool/zlibtool.htm - and contrib/visual-basic.txt + Make sure that before the call of compress, the length of the compressed + buffer is equal to the total size of the compressed buffer and not + zero. For Visual Basic, check that this parameter is passed by reference + ("as any"), not by value ("as long"). -3) compress() returns Z_BUF_ERROR + 5. deflate() or inflate() returns Z_BUF_ERROR - Make sure that before the call of compress, the length of the - compressed buffer is equal to the total size of the compressed buffer - and not zero. For Visual Basic, check that this parameter is passed - by reference ("as any"), not by value ("as long"). + Before making the call, make sure that avail_in and avail_out are not + zero. When setting the parameter flush equal to Z_FINISH, also make sure + that avail_out is big enough to allow processing all pending input. + 6. Where's the zlib documentation (man pages, etc.)? -4) deflate or inflate returns Z_BUF_ERROR + It's in zlib.h for the moment, and Francis S. Lin has converted it to a + web page zlib.html. Volunteers to transform this to Unix-style man pages, + please contact Jean-loup Gailly (jloup@gzip.org). Examples of zlib usage + are in the files example.c and minigzip.c. - Make sure that before the call avail_in and avail_out are not zero. + 7. Why don't you use GNU autoconf or libtool or ...? + Because we would like to keep zlib as a very small and simple + package. zlib is rather portable and doesn't need much configuration. -5) Where is the zlib documentation (man pages, etc...)? + 8. I found a bug in zlib. - It's in zlib.h for the moment. Volunteers to transform this - to man pages, please contact jloup@gzip.org. Examples of zlib usage - are in the files example.c and minigzip.c. + Most of the time, such problems are due to an incorrect usage of + zlib. Please try to reproduce the problem with a small program and send + the corresponding source to us at zlib@gzip.org . Do not send + multi-megabyte data files without prior agreement. + 9. Why do I get "undefined reference to gzputc"? -6) Why don't you use GNU autoconf, libtool, etc...? + If "make test" produces something like - Because we would like to keep zlib as a very small and simple package. - zlib is rather portable and doesn't need much configuration. + example.o(.text+0x154): undefined reference to `gzputc' + + check that you don't have old files libz.* in /usr/lib, /usr/local/lib or + /usr/X11R6/lib. Remove any old versions, then do "make install". +10. I need a Delphi interface to zlib. -7) There is a bug in zlib. + See the directories contrib/delphi and contrib/delphi2 in the zlib + distribution. - Most of the time, such problems are due to an incorrect usage - of zlib. Please try to reproduce the problem with a small - program and send us the corresponding source at zlib@quest.jpl.nasa.gov - Do not send multi-megabyte data files without prior agreement. +11. Can zlib handle .zip archives? + See the directory contrib/minizip in the zlib distribution. -8) I get "undefined reference to gzputc" +12. Can zlib handle .Z files? - If "make test" produces something like - example.o(.text+0x174): - check that you don't have old files libz.* in /usr/lib, /usr/local/lib - or /usr/X11R6/lib. Remove old versions then do "make install". + No, sorry. You have to spawn an uncompress or gunzip subprocess, or adapt + the code of uncompress on your own. +13. How can I make a Unix shared library? + + make clean + ./configure -s + make + +14. Why does "make test" fail on Mac OS X? + + Mac OS X already includes zlib as a shared library, and so -lz links the + shared library instead of the one that the "make" compiled. For zlib + 1.1.3, the two are incompatible due to different compile-time + options. Simply change the -lz in the Makefile to libz.a, and it will use + the compiled library instead of the shared one and the "make test" will + succeed. + +15. I have a question about OttoPDF + + We are not the authors of OttoPDF. The real author is on the OttoPDF web + site Joel Hainley jhainley@myndkryme.com. |