Re: long jump

Erik Andersen (andersen@xmission.com)
Wed, 10 Nov 1999 17:30:19 -0700

On Wed Nov 10, 1999 at 05:59:40PM -0500, Ju Wang wrote:
> Hi,
>
> Does any body how to use long jump in c/c++, I have a
> program that parse a hierachy structured bitstream, its
> call nested very deep, so I want to get back to the main
> instead of check error in each of the nested function and
> return one by one.
>
>
> Thanks in advance,
> -Ju Wang

Something like this:

#include <stdio.h>
#include <setjmp.h>

jmp_buf errorhandler;
#define FAIL(why) fprintf(stderr, why); longjmp(errorhandler, 1)

void main()
{

/* prepare for error handling */
if (setjmp(errorhandler)) {
exit( 1);
}

/* do stuff */
bar();

exit;
}

void bar()
{
FAIL("I'm long jumping!\n");

}

Now, how does this relate to linux-net?

-Erik

--
Erik B. Andersen   Web:    http://www.xmission.com/~andersen/ 
                   email:  andersee@debian.org
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