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/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim: set ts=8 sts=2 et sw=2 tw=80: */
/* 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 mozilla_AppData_h
#define mozilla_AppData_h
#include "nsXREAppData.h"
#include "nscore.h"
#include "nsStringGlue.h"
#include "nsISupportsUtils.h"
namespace mozilla {
// Like nsXREAppData, but releases all strong refs/allocated memory
// in the destructor.
class ScopedAppData : public nsXREAppData
{
public:
ScopedAppData()
{
Zero();
this->size = sizeof(*this);
}
explicit ScopedAppData(const nsXREAppData* aAppData);
void Zero() { memset(this, 0, sizeof(*this)); }
~ScopedAppData();
};
/**
* Given |aStr| is holding a string allocated with NS_Alloc, or null:
* replace the value in |aStr| with a new value.
*
* @param aNewValue Null is permitted. The string is cloned with NS_strdup.
*/
void SetAllocatedString(const char*& aStr, const char* aNewValue);
/**
* Given "str" is holding a string allocated with NS_Alloc, or null:
* replace the value in "str" with a new value.
*
* @param aNewValue If |aNewValue| is the empty string, |aStr| will be set
* to null.
*/
void SetAllocatedString(const char*& aStr, const nsACString& aNewValue);
template<class T>
void
SetStrongPtr(T*& aPtr, T* aNewValue)
{
NS_IF_RELEASE(aPtr);
aPtr = aNewValue;
NS_IF_ADDREF(aPtr);
}
} // namespace mozilla
#endif
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