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From: mcgrath@paris.Berkeley.EDU (Roland McGrath)
Newsgroups: gnu.gcc
Subject: Re: address of labels
Message-ID: <MCGRATH.89Apr28194200@paris.Berkeley.EDU>
Date: 29 Apr 89 02:42:00 GMT
References: <8904282319.AA08492@riunite.aca.mcc.com> <41161@oliveb.olivetti.com>
Sender: usenet@agate.BERKELEY.EDU
Distribution: gnu
Organization: Hackers Anonymous International, Ltd., Inc. (Applications welcome)
Lines: 33
In-reply-to: chase@Ozona.orc.olivetti.com's message of 29 Apr 89 01:09:10 GMT

You can fake a C jump table with setjmp/longjmp.  It's not too pretty, but
it'll do it:

foo()
{
  jmp_buf env;

  switch (setjmp(env))
    {
    case 0:
      /* The initial setjmp call.  */
      break;
    case 1:
      /* Do stuff, or goto somewhere.  */
    case 2:
      /* ... */
      break;
    }

  /* ... */
  if (do_foo2)
    longjmp(env, 2);


  /* ... */
  if (do_foo98)
    longjmp(env, 98);
}
--
	Roland McGrath
	Free Software Foundation, Inc.
roland@wheaties.ai.mit.edu, mit-eddie!wheaties.ai.mit.edu!roland
Copyright 1989 Roland McGrath, under the GNU General Public License, version 1.