dom/quota/ArrayCluster.h

   1 /* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
   2 /* vim: set ts=2 et sw=2 tw=80: */
   3 /* This Source Code Form is subject to the terms of the Mozilla Public
   4  * License, v. 2.0. If a copy of the MPL was not distributed with this file,
   5  * You can obtain one at http://mozilla.org/MPL/2.0/. */
   6
   7 #ifndef mozilla_dom_quota_arraycluster_h__
   8 #define mozilla_dom_quota_arraycluster_h__
   9
  10 #include "mozilla/dom/quota/QuotaCommon.h"
  11
  12 #include "Client.h"
  13
  14 BEGIN_QUOTA_NAMESPACE
  15
  16 template <class ValueType, uint32_t Length = Client::TYPE_MAX>
  17 class ArrayCluster
  18 {
  19 public:
  20   ArrayCluster()
  21   {
  22     mArrays.AppendElements(Length);
  23   }
  24
  25   nsTArray<ValueType>&
  26   ArrayAt(uint32_t aIndex)
  27   {
  28     MOZ_ASSERT(aIndex < Length, "Bad index!");
  29     return mArrays[aIndex];
  30   }
  31
  32   nsTArray<ValueType>&
  33   operator[](uint32_t aIndex)
  34   {
  35     return ArrayAt(aIndex);
  36   }
  37
  38   bool
  39   IsEmpty()
  40   {
  41     for (uint32_t index = 0; index < Length; index++) {
  42       if (!mArrays[index].IsEmpty()) {
  43         return false;
  44       }
  45     }
  46     return true;
  47   }
  48
  49   template <class T>
  50   void
  51   AppendElementsTo(uint32_t aIndex, nsTArray<T>& aArray)
  52   {
  53     NS_ASSERTION(aIndex < Length, "Bad index!");
  54     aArray.AppendElements(mArrays[aIndex]);
  55   }
  56
  57   template <class T>
  58   void
  59   AppendElementsTo(uint32_t aIndex, ArrayCluster<T, Length>& aArrayCluster)
  60   {
  61     NS_ASSERTION(aIndex < Length, "Bad index!");
  62     aArrayCluster[aIndex].AppendElements(mArrays[aIndex]);
  63   }
  64
  65   template <class T>
  66   void
  67   AppendElementsTo(nsTArray<T>& aArray)
  68   {
  69     for (uint32_t index = 0; index < Length; index++) {
  70       aArray.AppendElements(mArrays[index]);
  71     }
  72   }
  73
  74   template<class T>
  75   void
  76   AppendElementsTo(ArrayCluster<T, Length>& aArrayCluster)
  77   {
  78     for (uint32_t index = 0; index < Length; index++) {
  79       aArrayCluster[index].AppendElements(mArrays[index]);
  80     }
  81   }
  82
  83   template<class T>
  84   void
  85   SwapElements(ArrayCluster<T, Length>& aArrayCluster)
  86   {
  87     for (uint32_t index = 0; index < Length; index++) {
  88       mArrays[index].SwapElements(aArrayCluster.mArrays[index]);
  89     }
  90   }
  91
  92   void
  93   Clear()
  94   {
  95     for (uint32_t index = 0; index < Length; index++) {
  96       mArrays[index].Clear();
  97     }
  98   }
  99
 100 private:
 101   nsAutoTArray<nsTArray<ValueType>, Length> mArrays;
 102 };
 103
 104 END_QUOTA_NAMESPACE
 105
 106 #endif // mozilla_dom_quota_arraycluster_h__