event_attr_modlist.c

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/*
** Copyright (C) 2005 by Kevin L. Mitchell <klmitch@mit.edu>
**
** This program is free software; you can redistribute it and/or modify
** it under the terms of the GNU General Public License as published by
** the Free Software Foundation; either version 2 of the License, or
** (at your option) any later version.
**
** This program is distributed in the hope that it will be useful,
** but WITHOUT ANY WARRANTY; without even the implied warranty of
** MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
** GNU General Public License for more details.
**
** You should have received a copy of the GNU General Public License
** along with this program; if not, write to the Free Software
** Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
**
** @(#)$Id: event_attr_modlist.c,v 1.1 2005/06/03 15:54:58 klmitch Exp $
*/
#include "event_int.h"

RCSTAG("@(#)$Id: event_attr_modlist.c,v 1.1 2005/06/03 15:54:58 klmitch Exp $");

ev_err_t
event_attr_modlist(ev_attr_t *attr, const char **list)
{
  const char *oldlist;

  ev_init(); /* initialize library... */

  if (!ea_verify(attr) || !list) /* must be a valid attr */
    ev_return(EINVAL);

  oldlist = ea_modlist(attr); /* remember old list... */

  if (*list) /* setting a new list? */
    ea_modlist(attr) = *list; /* then set it! */

  *list = oldlist; /* and return the old list */

  ev_return(0);
}

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