dom/xslt/base/txExpandedNameMap.h@97036ab72558
dom/xslt/base/txExpandedNameMap.h
Tue, 06 Jan 2015 21:39:09 +0100
- author
- Michael Schloh von Bennewitz <michael@schloh.com>
- date
- Tue, 06 Jan 2015 21:39:09 +0100
- branch
- TOR_BUG_9701
- changeset 8
- 97036ab72558
- permissions
- -rw-r--r--
Conditionally force memory storage according to privacy.thirdparty.isolate;
This solves Tor bug #9701, complying with disk avoidance documented in
https://www.torproject.org/projects/torbrowser/design/#disk-avoidance.
1 /* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
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/. */
6 #ifndef TRANSFRMX_EXPANDEDNAMEMAP_H
7 #define TRANSFRMX_EXPANDEDNAMEMAP_H
9 #include "nsError.h"
10 #include "txXMLUtils.h"
11 #include "nsTArray.h"
13 class txExpandedNameMap_base {
14 protected:
15 /**
16 * Adds an item, if an item with this key already exists an error is
17 * returned
18 * @param aKey key for item to add
19 * @param aValue value of item to add
20 * @return errorcode
21 */
22 nsresult addItem(const txExpandedName& aKey, void* aValue);
24 /**
25 * Sets an item, if an item with this key already exists it is overwritten
26 * with the new value
27 * @param aKey key for item to set
28 * @param aValue value of item to set
29 * @return errorcode
30 */
31 nsresult setItem(const txExpandedName& aKey, void* aValue,
32 void** aOldValue);
34 /**
35 * Gets an item
36 * @param aKey key for item to get
37 * @return item with specified key, or null if no such item exists
38 */
39 void* getItem(const txExpandedName& aKey) const;
41 /**
42 * Removes an item, deleting it if the map owns the values
43 * @param aKey key for item to remove
44 * @return item with specified key, or null if it has been deleted
45 * or no such item exists
46 */
47 void* removeItem(const txExpandedName& aKey);
49 /**
50 * Clears the items
51 */
52 void clearItems()
53 {
54 mItems.Clear();
55 }
57 class iterator_base {
58 public:
59 iterator_base(txExpandedNameMap_base& aMap)
60 : mMap(aMap),
61 mCurrentPos(uint32_t(-1))
62 {
63 }
65 bool next()
66 {
67 return ++mCurrentPos < mMap.mItems.Length();
68 }
70 const txExpandedName key()
71 {
72 NS_ASSERTION(mCurrentPos < mMap.mItems.Length(),
73 "invalid position in txExpandedNameMap::iterator");
74 return txExpandedName(mMap.mItems[mCurrentPos].mNamespaceID,
75 mMap.mItems[mCurrentPos].mLocalName);
76 }
78 protected:
79 void* itemValue()
80 {
81 NS_ASSERTION(mCurrentPos < mMap.mItems.Length(),
82 "invalid position in txExpandedNameMap::iterator");
83 return mMap.mItems[mCurrentPos].mValue;
84 }
86 private:
87 txExpandedNameMap_base& mMap;
88 uint32_t mCurrentPos;
89 };
91 friend class iterator_base;
93 friend class txMapItemComparator;
94 struct MapItem {
95 int32_t mNamespaceID;
96 nsCOMPtr<nsIAtom> mLocalName;
97 void* mValue;
98 };
100 nsTArray<MapItem> mItems;
101 };
103 template<class E>
104 class txExpandedNameMap : public txExpandedNameMap_base
105 {
106 public:
107 nsresult add(const txExpandedName& aKey, E* aValue)
108 {
109 return addItem(aKey, (void*)aValue);
110 }
112 nsresult set(const txExpandedName& aKey, E* aValue)
113 {
114 void* oldValue;
115 return setItem(aKey, (void*)aValue, &oldValue);
116 }
118 E* get(const txExpandedName& aKey) const
119 {
120 return (E*)getItem(aKey);
121 }
123 E* remove(const txExpandedName& aKey)
124 {
125 return (E*)removeItem(aKey);
126 }
128 void clear()
129 {
130 clearItems();
131 }
133 class iterator : public iterator_base
134 {
135 public:
136 iterator(txExpandedNameMap& aMap)
137 : iterator_base(aMap)
138 {
139 }
141 E* value()
142 {
143 return (E*)itemValue();
144 }
145 };
146 };
148 template<class E>
149 class txOwningExpandedNameMap : public txExpandedNameMap_base
150 {
151 public:
152 ~txOwningExpandedNameMap()
153 {
154 clear();
155 }
157 nsresult add(const txExpandedName& aKey, E* aValue)
158 {
159 return addItem(aKey, (void*)aValue);
160 }
162 nsresult set(const txExpandedName& aKey, E* aValue)
163 {
164 nsAutoPtr<E> oldValue;
165 return setItem(aKey, (void*)aValue, getter_Transfers(oldValue));
166 }
168 E* get(const txExpandedName& aKey) const
169 {
170 return (E*)getItem(aKey);
171 }
173 void remove(const txExpandedName& aKey)
174 {
175 delete (E*)removeItem(aKey);
176 }
178 void clear()
179 {
180 uint32_t i, len = mItems.Length();
181 for (i = 0; i < len; ++i) {
182 delete (E*)mItems[i].mValue;
183 }
184 clearItems();
185 }
187 class iterator : public iterator_base
188 {
189 public:
190 iterator(txOwningExpandedNameMap& aMap)
191 : iterator_base(aMap)
192 {
193 }
195 E* value()
196 {
197 return (E*)itemValue();
198 }
199 };
200 };
202 #endif //TRANSFRMX_EXPANDEDNAMEMAP_H
