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/* ***** BEGIN LICENSE BLOCK *****
 * Version: MPL 1.1/GPL 2.0/LGPL 2.1
 * The contents of this file are subject to the Mozilla Public License Version
 * 1.1 (the "License"); you may not use this file except in compliance with
 * the License. You may obtain a copy of the License at
 * http://www.mozilla.org/MPL/
 * Software distributed under the License is distributed on an "AS IS" basis,
 * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
 * for the specific language governing rights and limitations under the
 * License.
 * The Original Code is Mozilla IPC.
 * The Initial Developer of the Original Code is
 * Netscape Communications Corporation.
 * Portions created by the Initial Developer are Copyright (C) 2002
 * the Initial Developer. All Rights Reserved.
 * Contributor(s):
 *   Darin Fisher <darin@netscape.com>
 * Alternatively, the contents of this file may be used under the terms of
 * either the GNU General Public License Version 2 or later (the "GPL"), or
 * the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
 * in which case the provisions of the GPL or the LGPL are applicable instead
 * of those above. If you wish to allow use of your version of this file only
 * under the terms of either the GPL or the LGPL, and not to allow others to
 * use your version of this file under the terms of the MPL, indicate your
 * decision by deleting the provisions above and replace them with the notice
 * and other provisions required by the GPL or the LGPL. If you do not delete
 * the provisions above, a recipient may use your version of this file under
 * the terms of any one of the MPL, the GPL or the LGPL.
 * ***** END LICENSE BLOCK ***** */

#ifndef ipcMessageUtils_h__
#define ipcMessageUtils_h__

class ipcMessage;

// given code like this:
//    const ipcmMessageClientID *msg = (const ipcmMessageClientID *) rawMsg;
// we can write:
//    ipcMessageCast<ipcmMessageClientID> msg(rawMsg);
// XXX ipcMessageCast is probably not the best name for this class.
template<class T>
class ipcMessageCast
    ipcMessageCast() : mPtr(NULL) {}
    ipcMessageCast(const ipcMessage *ptr) : mPtr((const T *) ptr) {}
    void operator=(const ipcMessage *ptr) { mPtr = (const T *) ptr; }
    const T *operator->() { return mPtr; }
    const T *mPtr;

#endif // !ipcMessageUtils_h__

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