40 lines
1.1 KiB
C++
40 lines
1.1 KiB
C++
/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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#ifndef nsArrayUtils_h__
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#define nsArrayUtils_h__
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#include "nsCOMPtr.h"
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#include "nsIArray.h"
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// helper class for do_QueryElementAt
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class MOZ_STACK_CLASS nsQueryArrayElementAt final : public nsCOMPtr_helper
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{
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public:
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nsQueryArrayElementAt(nsIArray* aArray, uint32_t aIndex,
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nsresult* aErrorPtr)
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: mArray(aArray)
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, mIndex(aIndex)
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, mErrorPtr(aErrorPtr)
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{
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}
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virtual nsresult NS_FASTCALL operator()(const nsIID& aIID, void**) const
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override;
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private:
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nsIArray* MOZ_NON_OWNING_REF mArray;
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uint32_t mIndex;
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nsresult* mErrorPtr;
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};
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inline const nsQueryArrayElementAt
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do_QueryElementAt(nsIArray* aArray, uint32_t aIndex, nsresult* aErrorPtr = 0)
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{
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return nsQueryArrayElementAt(aArray, aIndex, aErrorPtr);
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}
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#endif // nsArrayUtils_h__
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