gecko/xpcom/glue/nsArrayUtils.h
2012-05-21 12:12:37 +01:00

41 lines
1.1 KiB
C++

/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
#ifndef nsArrayUtils_h__
#define nsArrayUtils_h__
#include "nsCOMPtr.h"
#include "nsIArray.h"
// helper class for do_QueryElementAt
class NS_COM_GLUE nsQueryArrayElementAt : public nsCOMPtr_helper
{
public:
nsQueryArrayElementAt(nsIArray* aArray, PRUint32 aIndex,
nsresult* aErrorPtr)
: mArray(aArray),
mIndex(aIndex),
mErrorPtr(aErrorPtr)
{
// nothing else to do here
}
virtual nsresult NS_FASTCALL operator()(const nsIID& aIID, void**) const;
private:
nsIArray* mArray;
PRUint32 mIndex;
nsresult* mErrorPtr;
};
inline
const nsQueryArrayElementAt
do_QueryElementAt(nsIArray* aArray, PRUint32 aIndex, nsresult* aErrorPtr = 0)
{
return nsQueryArrayElementAt(aArray, aIndex, aErrorPtr);
}
#endif // nsArrayUtils_h__