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<!DOCTYPE HTML PUBLIC "-//W3O//DTD W3 HTML 2.0//EN"><!-- This collection of hypertext pages is Copyright 1995-2005 by Steve Summit. --><!-- Content from the book "C Programming FAQs: Frequently Asked Questions" --><!-- (Addison-Wesley, 1995, ISBN 0-201-84519-9) is made available here by --><!-- permission of the author and the publisher as a service to the community. --><!-- It is intended to complement the use of the published text --><!-- and is protected by international copyright laws. --><!-- The on-line content may be accessed freely for personal use --><!-- but may not be published or retransmitted without explicit permission. --><!-- --><!-- this page built Sat Dec 24 21:47:46 2005 by faqproc version 2.7 --><!-- from source file ansi.sgml dated Wed Aug 11 00:43:45 2004 --><!-- corresponding to FAQ list version 4.0 --><html><!-- Mirrored from c-faq.com/ansi/cproto.html by HTTrack Website Copier/3.x [XR&CO'2008], Sat, 14 Mar 2009 07:58:56 GMT --><head><meta name=GENERATOR content="faqproc"><title>Question 11.31</title><link href="preansilib.html" rev=precedes><link href="extensions.html" rel=precedes><link href="index.html" rev=subdocument></head><body bgcolor="#ffffff"><a href="preansilib.html" rev=precedes><img src="../images/buttonleft.gif" alt="prev"></a><a href="index.html" rev=subdocument><img src="../images/buttonup.gif" alt="up"></a><a href="extensions.html" rel=precedes><img src="../images/buttonright.gif" alt="next"></a> <a href="../index-2.html"><img src="../images/buttontop.gif" alt="top/contents"></a><a href="../search.html"><img src="../images/buttonsrch.gif" alt="search"></a><hr><p><!-- qbegin --><h1>comp.lang.c FAQ list<font color=blue>·</font><!-- qtag -->Question 11.31</h1><p><font face=Helvetica size=8 color=blue><b>Q:</b></font>Does anyone have a tool for converting old-style C programs toANSI C,or vice versa,or for automatically generating prototypes?</p><p><hr><p><font face=Helvetica size=8 color=blue><b>A:</b></font>Two programs, protoize and unprotoize,convert back and forth between prototyped and ``oldstyle'' function definitions and declarations.(These programs do<em>not</em>handle full-blown translation between``Classic'' Cand ANSI C.)These programsare part ofthe FSF's GNU C compiler distribution;see question <a href="../resources/compilers.html">18.3</a>.</p><p>The unproto program(/pub/unix/unproto5.shar.Z on ftp.win.tue.nl)is a filter which sits between the preprocessorand the next compiler pass,converting most of ANSI C to traditional C on-the-fly.</p><p>The GNU GhostScript package comes witha little program called ansi2knr.</p><p>Before converting ANSI C back to old-style,beware that such a conversion cannot always be made both safely and automatically.ANSI C introducesnew features and complexitiesnot found in K&R C.You'll especially need to becareful of prototyped function calls;you'll probably need to insert explicit casts.See also questions <a href="argpromos.html">11.3</a> and <a href="preansi.html">11.29a</a>.</p><p>Several prototype generators exist,many as modifications to <TT>lint</TT>.A program calledCPROTO was posted to comp.sources.misc in March, 1992.There is another program called ``cextract.''Many vendors supply simple utilitieslike thesewith their compilers.See alsoquestion<a href="../resources/sources.html">18.16</a>.(Butbe carefulwhen generating prototypes for old functionswith ``narrow'' parameters;seequestion<a href="argpromos.html">11.3</a>.)</p><!-- aend --><p><hr><a href="preansilib.html" rev=precedes><img src="../images/buttonleft.gif" alt="prev"></a><a href="index.html" rev=subdocument><img src="../images/buttonup.gif" alt="up"></a><a href="extensions.html" rel=precedes><img src="../images/buttonright.gif" alt="next"></a> <a href="../questions.html"><img src="../images/buttontop.gif" alt="contents"></a><a href="../search.html"><img src="../images/buttonsrch.gif" alt="search"></a><br><!-- lastfooter --><a href="../about.html">about this FAQ list</a> <a href="../eskimo.html">about eskimo</a> <a href="../search.html">search</a> <a href="../feedback.html">feedback</a> <a href="copyright.html">copyright</a><p>Hosted by<a href="http://www.eskimo.com/"><img src="../../www.eskimo.com/img/link/eskitiny.gif" alt="Eskimo North"></a></body><!-- Mirrored from c-faq.com/ansi/cproto.html by HTTrack Website Copier/3.x [XR&CO'2008], Sat, 14 Mar 2009 07:58:56 GMT --></html>⌨️ 快捷键说明
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