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source: vbox/trunk/src/libs/xpcom18a4/xpcom/glue/nsIInterfaceRequestorUtils.cpp@ 59704

最後變更 在這個檔案從59704是 1,由 vboxsync 提交於 55 年 前

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1/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
2/* ***** BEGIN LICENSE BLOCK *****
3 * Version: MPL 1.1/GPL 2.0/LGPL 2.1
4 *
5 * The contents of this file are subject to the Mozilla Public License Version
6 * 1.1 (the "License"); you may not use this file except in compliance with
7 * the License. You may obtain a copy of the License at
8 * http://www.mozilla.org/MPL/
9 *
10 * Software distributed under the License is distributed on an "AS IS" basis,
11 * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
12 * for the specific language governing rights and limitations under the
13 * License.
14 *
15 * The Original Code is mozilla.org code.
16 *
17 * The Initial Developer of the Original Code is
18 * Netscape Communications Corporation.
19 * Portions created by the Initial Developer are Copyright (C) 1998
20 * the Initial Developer. All Rights Reserved.
21 *
22 * Contributor(s):
23 * Scott Collins <[email protected]>
24 *
25 * Alternatively, the contents of this file may be used under the terms of
26 * either of the GNU General Public License Version 2 or later (the "GPL"),
27 * or the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
28 * in which case the provisions of the GPL or the LGPL are applicable instead
29 * of those above. If you wish to allow use of your version of this file only
30 * under the terms of either the GPL or the LGPL, and not to allow others to
31 * use your version of this file under the terms of the MPL, indicate your
32 * decision by deleting the provisions above and replace them with the notice
33 * and other provisions required by the GPL or the LGPL. If you do not delete
34 * the provisions above, a recipient may use your version of this file under
35 * the terms of any one of the MPL, the GPL or the LGPL.
36 *
37 * ***** END LICENSE BLOCK ***** */
38
39#include "nsIInterfaceRequestor.h"
40#include "nsIInterfaceRequestorUtils.h"
41
42nsresult
43nsGetInterface::operator()( const nsIID& aIID, void** aInstancePtr ) const
44{
45 nsresult status;
46
47 if ( mSource )
48 {
49 nsCOMPtr<nsIInterfaceRequestor> factoryPtr = do_QueryInterface(mSource, &status);
50 NS_ASSERTION(factoryPtr, "Did you know you were calling |do_GetInterface()| on an object that doesn't support the |nsIInterfaceRequestor| interface?");
51
52 if ( factoryPtr )
53 status = factoryPtr->GetInterface(aIID, aInstancePtr);
54
55 if ( NS_FAILED(status) )
56 *aInstancePtr = 0;
57 }
58 else
59 status = NS_ERROR_NULL_POINTER;
60
61 if ( mErrorPtr )
62 *mErrorPtr = status;
63 return status;
64}
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