Path: utzoo!utgpu!jarvis.csri.toronto.edu!cs.utexas.edu!uunet!mcsun!sunic!tut!hydra!kreeta!grano
From: grano@cs.Helsinki.FI (Kari Gran|)
Newsgroups: comp.lang.c
Subject: Re: exception handling in C
Message-ID: <4400@hydra.Helsinki.FI>
Date: 9 Mar 90 00:17:02 GMT
References: <4767@crltrx.crl.dec.com> <7990004@hpopd.HP.COM>
Sender: news@cs.Helsinki.FI
Organization: University of Helsinki, Department of Computer Science
Lines: 24


	There is a paper titled 'Excaption Handling in C' by Eric. S.
Roberts, published by Digital Equipment Corp., 1989, which describes a
simple exception handling mechanism implemented with preprocessor. The
resulting code looks something like this:

	exception OpenError;

	TRY
		fp = myopen("test.dat", "r");
	EXCEPT(OpenError)
		printf("Cannot open test.dat\n");
	EXCEPT(....)
		...
	ENDTRY

and in your routines you can use RAISE to raise exceptions.  The exceptions
follow a dynamic call chain at runtime.  Full source code is included in
the paper; works well, according to my (minor) tests.

Kari.
--
Kari Grano	grano@cs.helsinki.fi	Hey, my opinions are just mine..
	"I've got a thousand telephones that don't ring" - R.Z.