CDE/cde/programs/nsgmls/TypeId.C

/*
 * CDE - Common Desktop Environment
 *
 * Copyright (c) 1993-2012, The Open Group. All rights reserved.
 *
 * These libraries and programs are free software; you can
 * redistribute them and/or modify them under the terms of the GNU
 * Lesser General Public License as published by the Free Software
 * Foundation; either version 2 of the License, or (at your option)
 * any later version.
 *
 * These libraries and programs are distributed in the hope that
 * they will be useful, but WITHOUT ANY WARRANTY; without even the
 * implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
 * PURPOSE. See the GNU Lesser General Public License for more
 * details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with these libraries and programs; if not, write
 * to the Free Software Foundation, Inc., 51 Franklin Street, Fifth
 * Floor, Boston, MA 02110-1301 USA
 */
/* $XConsortium: TypeId.C /main/1 1996/07/29 17:06:52 cde-hp $ */
// Copyright (c) 1994 James Clark
// See the file COPYING for copying permission.

#include "splib.h"
#include "TypeId.h"

#ifdef SP_NAMESPACE
namespace SP_NAMESPACE {
#endif

int TypeId::isA(TypeId ti) const
{
  if (*this == ti)
    return 1;
  for (const void *const *p = bases_; *p; p++)
    if (TypeId((const void *const *)*p).isA(ti))
      return 1;
  return 0;
}

int TypeId::canCast(TypeId to, TypeId from) const
{
  return isA(to) && to.isA(from);
}

#ifdef SP_NAMESPACE
}
#endif