dom/xslt/base/txExpandedNameMap.cpp

   1 /* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
   2 /* This Source Code Form is subject to the terms of the Mozilla Public
   3  * License, v. 2.0. If a copy of the MPL was not distributed with this
   4  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
   5
   6 #include "txExpandedNameMap.h"
   7 #include "txCore.h"
   8
   9 class txMapItemComparator {
  10  public:
  11   bool Equals(const txExpandedNameMap_base::MapItem& aItem,
  12               const txExpandedName& aKey) const {
  13     return aItem.mNamespaceID == aKey.mNamespaceID &&
  14            aItem.mLocalName == aKey.mLocalName;
  15   }
  16 };
  17
  18 /**
  19  * Adds an item, if an item with this key already exists an error is
  20  * returned
  21  * @param  aKey   key for item to add
  22  * @param  aValue value of item to add
  23  * @return errorcode
  24  */
  25 nsresult txExpandedNameMap_base::addItem(const txExpandedName& aKey,
  26                                          void* aValue) {
  27   size_t pos = mItems.IndexOf(aKey, 0, txMapItemComparator());
  28   if (pos != mItems.NoIndex) {
  29     return NS_ERROR_XSLT_ALREADY_SET;
  30   }
  31
  32   MapItem* item = mItems.AppendElement();
  33   item->mNamespaceID = aKey.mNamespaceID;
  34   item->mLocalName = aKey.mLocalName;
  35   item->mValue = aValue;
  36
  37   return NS_OK;
  38 }
  39
  40 /**
  41  * Sets an item, if an item with this key already exists it is overwritten
  42  * with the new value
  43  * @param  aKey   key for item to set
  44  * @param  aValue value of item to set
  45  * @return errorcode
  46  */
  47 nsresult txExpandedNameMap_base::setItem(const txExpandedName& aKey,
  48                                          void* aValue, void** aOldValue) {
  49   *aOldValue = nullptr;
  50   size_t pos = mItems.IndexOf(aKey, 0, txMapItemComparator());
  51   if (pos != mItems.NoIndex) {
  52     *aOldValue = mItems[pos].mValue;
  53     mItems[pos].mValue = aValue;
  54     return NS_OK;
  55   }
  56
  57   MapItem* item = mItems.AppendElement();
  58   item->mNamespaceID = aKey.mNamespaceID;
  59   item->mLocalName = aKey.mLocalName;
  60   item->mValue = aValue;
  61
  62   return NS_OK;
  63 }
  64
  65 /**
  66  * Gets an item
  67  * @param  aKey  key for item to get
  68  * @return item with specified key, or null if no such item exists
  69  */
  70 void* txExpandedNameMap_base::getItem(const txExpandedName& aKey) const {
  71   size_t pos = mItems.IndexOf(aKey, 0, txMapItemComparator());
  72   if (pos != mItems.NoIndex) {
  73     return mItems[pos].mValue;
  74   }
  75
  76   return nullptr;
  77 }
  78
  79 /**
  80  * Removes an item, deleting it if the map owns the values
  81  * @param  aKey  key for item to remove
  82  * @return item with specified key, or null if it has been deleted
  83  *         or no such item exists
  84  */
  85 void* txExpandedNameMap_base::removeItem(const txExpandedName& aKey) {
  86   void* value = nullptr;
  87   size_t pos = mItems.IndexOf(aKey, 0, txMapItemComparator());
  88   if (pos != mItems.NoIndex) {
  89     value = mItems[pos].mValue;
  90     mItems.RemoveElementAt(pos);
  91   }
  92
  93   return value;
  94 }