112 lines
3.2 KiB
HTML
112 lines
3.2 KiB
HTML
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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
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<HTML>
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<HEAD>
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<META NAME="generator" CONTENT="http://txt2tags.org">
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<LINK REL="stylesheet" TYPE="text/css" HREF="DOC.css">
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<TITLE>CMPH FAQ</TITLE>
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</HEAD><BODY BGCOLOR="white" TEXT="black">
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<CENTER>
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<H1>CMPH FAQ</H1>
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</CENTER>
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<UL>
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<LI>How do I define the ids of the keys?
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</UL>
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<BLOCKQUOTE>
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- You don't. The ids will be assigned by the algorithm creating the minimal
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perfect hash function. If the algorithm creates an <B>ordered</B> minimal
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perfect hash function, the ids will be the indices of the keys in the
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input. Otherwise, you have no guarantee of the distribution of the ids.
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</BLOCKQUOTE>
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<UL>
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<LI>Why do I always get the error "Unable to create minimum perfect hashing function"?
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</UL>
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<BLOCKQUOTE>
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- The algorithms do not guarantee that a minimal perfect hash function can
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be created. In practice, it will always work if your input
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is big enough (>100 keys).
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The error is probably because you have duplicated
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keys in the input. You must guarantee that the keys are unique in the
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input. If you are using a UN*X based OS, try doing
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</BLOCKQUOTE>
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<PRE>
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#sort input.txt | uniq > input_uniq.txt
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</PRE>
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<BLOCKQUOTE>
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and run cmph with input_uniq.txt
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</BLOCKQUOTE>
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<UL>
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<LI>Why do I change the hash function using cmph_config_set_hashfuncs function and the default (jenkins)
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one is executed?
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</UL>
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<BLOCKQUOTE>
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- Probably you are you using the cmph_config_set_algo function after
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the cmph_config_set_hashfuncs. Therefore, the default hash function
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is reset when you call the cmph_config_set_algo function.
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</BLOCKQUOTE>
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<UL>
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<LI>What do I do when the following error is got?
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</UL>
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<BLOCKQUOTE>
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- Error: <B>error while loading shared libraries: libcmph.so.0: cannot open shared object file: No such file ordirectory</B>
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</BLOCKQUOTE>
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<BLOCKQUOTE>
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- Solution: type <B>export LD_LIBRARY_PATH=$LD_LIBRARY_PATH:/usr/local/lib/</B> at the shell or put that shell command
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in your .profile file or in the /etc/profile file.
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</BLOCKQUOTE>
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<HR NOSHADE SIZE=1>
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<TABLE ALIGN="center" CELLPADDING="4">
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<TR>
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<TD><A HREF="index.html">Home</A></TD>
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<TD><A HREF="chd.html">CHD</A></TD>
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<TD><A HREF="bdz.html">BDZ</A></TD>
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<TD><A HREF="bmz.html">BMZ</A></TD>
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<TD><A HREF="chm.html">CHM</A></TD>
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<TD><A HREF="brz.html">BRZ</A></TD>
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<TD><A HREF="fch.html">FCH</A></TD>
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</TR>
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</TABLE>
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<HR NOSHADE SIZE=1>
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<P>
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Enjoy!
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</P>
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<P>
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<A HREF="mailto:davi@users.sourceforge.net">Davi de Castro Reis</A>
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</P>
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<P>
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<A HREF="mailto:db8192@users.sourceforge.net">Djamel Belazzougui</A>
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</P>
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<P>
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<A HREF="mailto:fc_botelho@users.sourceforge.net">Fabiano Cupertino Botelho</A>
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</P>
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<P>
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<A HREF="mailto:nivio@dcc.ufmg.br">Nivio Ziviani</A>
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</P>
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<!-- html code generated by txt2tags 2.6 (http://txt2tags.org) -->
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