xplc-cxx/getiface.cc

   1 /* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*-
   2  *
   3  * XPLC - Cross-Platform Lightweight Components
   4  * Copyright (C) 2002, Pierre Phaneuf
   5  *
   6  * This library is free software; you can redistribute it and/or
   7  * modify it under the terms of the GNU Lesser General Public License
   8  * as published by the Free Software Foundation; either version 2.1 of
   9  * the License, or (at your option) any later version.
  10  *
  11  * This library is distributed in the hope that it will be useful, but
  12  * WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14  * Lesser General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU Lesser General Public
  17  * License along with this library; if not, write to the Free Software
  18  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
  19  * USA
  20  *
  21  * As a special exception, you may use this file as part of a free
  22  * software library without restriction.  Specifically, if other files
  23  * instantiate templates or use macros or inline functions from this
  24  * file, or you compile this file and link it with other files to
  25  * produce an executable, this file does not by itself cause the
  26  * resulting executable to be covered by the GNU Lesser General Public
  27  * License.  This exception does not however invalidate any other
  28  * reasons why the executable file might be covered by the GNU Lesser
  29  * General Public License.
  30  */
  31
  32 #include <xplc/utils.h>
  33 #include <xplc/uuidops.h>
  34
  35 UUID_MAP_BEGIN(WeakRef)
  36   UUID_MAP_ENTRY(IObject)
  37   UUID_MAP_ENTRY(IWeakRef)
  38   UUID_MAP_END
  39
  40 IObject* IObjectImplInternal::getInterface(void* self,
  41                                            const UUID& uuid,
  42                                            const UUID_Info* uuidlist) {
  43   IObject* rv;
  44
  45   while(uuidlist->iid) {
  46     if(*(uuidlist->iid) == uuid) {
  47       rv = reinterpret_cast<IObject*>
  48         (reinterpret_cast<ptrdiff_t>(self) + uuidlist->delta);
  49       rv->addRef();
  50       return rv;
  51     }
  52     uuidlist++;
  53   }
  54
  55   return 0;
  56 }
  57