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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN"><HTML><HEAD> <TITLE>int pblIsamSetCompareFunction</TITLE> <META NAME="GENERATOR" CONTENT="DOC++ 3.4.9"></HEAD> <center><H2>Program Base Library Functions</H2></center><H2>int <A HREF="#DOC.DOCU">pblIsamSetCompareFunction</A></H2><H2>( <!1><A HREF="pblIsamFile_t.html">pblIsamFile_t</A>* isamfile,<BR> int index,<BR> int (* keycompare ) ( void* left,<BR> size_t llen, void* right,<BR> size_t rlen ) )</H2><BLOCKQUOTE> set an application specific compare function for a key of an ISAM file</BLOCKQUOTE><A NAME="DOC.DOCU"></A><HR><H2>Documentation</H2><BLOCKQUOTE>set an application specific compare function for a key of an ISAM file<P>parameter index specifies which of the indices to setthe compare function for<P>an application specific compare function can be used in order toimplement special orderings of the values of an index, e.g.because of the use of european "umlauts" in names<P>the default compare function is the c-library memcmp functionthe keycompare function should behave like memcmp<P></BLOCKQUOTE><DL><DT><DT><B>Parameters:</B><DD><B>isamfile</B> - ISAM file to set function for <BR><B>index</B> - index of key to set function for <BR><B>keycompare</B> - compare function to set <BR><B>left</B> - "left" buffer for compare <BR><B>llen</B> - length of that buffer <BR><B>right</B> - "right" buffer for compare <BR><B>rlen</B> - length of that buffer <BR><DT><B>Returns:</B><DD> int rc == 0: call went ok<BR> int rc != 0: some error occured, see pbl_errno<BR><DD></DL><P><P><I><A HREF="index.html">Alphabetic index</A></I></P><HR><BR>This page was generated with the help of <A HREF="http://docpp.sourceforge.net">DOC++</A>.</BODY></HTML>⌨️ 快捷键说明
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