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<HTML><!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"><!-- Created on September, 12 2004 by texi2html 1.64 --><!-- Written by: Lionel Cons <Lionel.Cons@cern.ch> (original author) Karl Berry <karl@freefriends.org> Olaf Bachmann <obachman@mathematik.uni-kl.de> and many others.Maintained by: Olaf Bachmann <obachman@mathematik.uni-kl.de>Send bugs and suggestions to <texi2html@mathematik.uni-kl.de> --><HEAD><TITLE>Autoconf, Automake, and Libtool: Generalised List Data Type</TITLE><META NAME="description" CONTENT="Autoconf, Automake, and Libtool: Generalised List Data Type"><META NAME="keywords" CONTENT="Autoconf, Automake, and Libtool: Generalised List Data Type"><META NAME="resource-type" CONTENT="document"><META NAME="distribution" CONTENT="global"><META NAME="Generator" CONTENT="texi2html 1.64"><script language="Javascript"><!-- // Check the browser version. function checkVersion() { if (navigator.appVersion.charAt(0)>=3) return true; if (navigator.appVersion.charAt(0)>=4) return true; 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It is surprisingly simple to write a catch-all implementation,as I have done here with a generalised list operation API in<TT>`list.h'</TT>:</P><P><TABLE width=100%><tr><td> </td><td class=example bgcolor=#6688aa><br><pre></pre></td></tr></table></P><P>The trick is to ensure that any structures you want to chain togetherhave their forward pointer in the first field. Having done that, thegeneric functions declared above can be used to manipulate any suchchain by casting it to <CODE>List *</CODE> and back again as necessary.</P><P>For example:</P><P><TABLE><tr><td> </td><td class=smallexample><FONT SIZE=-1><pre>struct foo { struct foo *next; char *bar; struct baz *qux; ...};... struct foo *foo_list = NULL; foo_list = (struct foo *) list_cons ((List *) new_foo (), (List *) foo_list);...</FONT></pre></td></tr></table></P><P>The implementation of the list manipulation functions is in<TT>`list.c'</TT>:</P><P><TABLE width=100%><tr><td> </td><td class=example bgcolor=#6688aa><br><pre></pre></td></tr></table></P><P><A NAME="Library Implementation"></A></TR></TABLE><BR> <FONT SIZE="-1">This document was generatedby <I>Gary V. Vaughan</I> on <I>September, 12 2004</I>using <A HREF="http://www.mathematik.uni-kl.de/~obachman/Texi2html"><I>texi2html</I></A></BODY></HTML>⌨️ 快捷键说明
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