Relay-Version: version B 2.10 5/3/83; site utzoo.UUCP
Path: utzoo!linus!decvax!ittvax!dcdwest!sdcsvax!sdcrdcf!hplabs!sri-unix!gwyn@BRL-VLD.ARPA
From: gwyn@BRL-VLD.ARPA
Newsgroups: net.lang.c
Subject: Re:  longjmp() erases recursion level
Message-ID: <12837@sri-arpa.UUCP>
Date: Sun, 26-Aug-84 06:31:46 EDT
Article-I.D.: sri-arpa.12837
Posted: Sun Aug 26 06:31:46 1984
Date-Received: Thu, 30-Aug-84 19:40:06 EDT
Lines: 23

From:      Doug Gwyn (VLD/VMB) <gwyn@BRL-VLD.ARPA>

I don't see how using setjmp/longjmp to short-circuit recursion is
any "cleaner" than the following:

main()
{	...
	sub();
	...
}

sub()
{	static int level = 0;
	...
	if ( ++level <= 1 )
		sub();
	--level;
}

This method also lets you select a more general "recursion depth",
useful for example in searching game trees, and sub() can return
a value to its parent if required (as it usually would be in a
practical application).