gecko-dev/dom/quota/ArrayCluster.h

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/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim: set ts=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_dom_quota_arraycluster_h__
#define mozilla_dom_quota_arraycluster_h__
#include "mozilla/dom/quota/QuotaCommon.h"
#include "Client.h"
BEGIN_QUOTA_NAMESPACE
template <class ValueType, uint32_t Length = Client::TYPE_MAX>
class ArrayCluster
{
public:
ArrayCluster()
{
mArrays.AppendElements(Length);
}
nsTArray<ValueType>&
ArrayAt(uint32_t aIndex)
{
MOZ_ASSERT(aIndex < Length, "Bad index!");
return mArrays[aIndex];
}
nsTArray<ValueType>&
operator[](uint32_t aIndex)
{
return ArrayAt(aIndex);
}
bool
IsEmpty()
{
for (uint32_t index = 0; index < Length; index++) {
if (!mArrays[index].IsEmpty()) {
return false;
}
}
return true;
}
template <class T>
void
AppendElementsTo(uint32_t aIndex, nsTArray<T>& aArray)
{
NS_ASSERTION(aIndex < Length, "Bad index!");
aArray.AppendElements(mArrays[aIndex]);
}
template <class T>
void
AppendElementsTo(uint32_t aIndex, ArrayCluster<T, Length>& aArrayCluster)
{
NS_ASSERTION(aIndex < Length, "Bad index!");
aArrayCluster[aIndex].AppendElements(mArrays[aIndex]);
}
template <class T>
void
AppendElementsTo(nsTArray<T>& aArray)
{
for (uint32_t index = 0; index < Length; index++) {
aArray.AppendElements(mArrays[index]);
}
}
template<class T>
void
AppendElementsTo(ArrayCluster<T, Length>& aArrayCluster)
{
for (uint32_t index = 0; index < Length; index++) {
aArrayCluster[index].AppendElements(mArrays[index]);
}
}
template<class T>
void
SwapElements(ArrayCluster<T, Length>& aArrayCluster)
{
for (uint32_t index = 0; index < Length; index++) {
mArrays[index].SwapElements(aArrayCluster.mArrays[index]);
}
}
void
Clear()
{
for (uint32_t index = 0; index < Length; index++) {
mArrays[index].Clear();
}
}
private:
nsAutoTArray<nsTArray<ValueType>, Length> mArrays;
};
END_QUOTA_NAMESPACE
#endif // mozilla_dom_quota_arraycluster_h__