1 | /* |
2 | * Copyright (C) 2008 Apple Inc. All Rights Reserved. |
3 | * |
4 | * Redistribution and use in source and binary forms, with or without |
5 | * modification, are permitted provided that the following conditions |
6 | * are met: |
7 | * 1. Redistributions of source code must retain the above copyright |
8 | * notice, this list of conditions and the following disclaimer. |
9 | * 2. Redistributions in binary form must reproduce the above copyright |
10 | * notice, this list of conditions and the following disclaimer in the |
11 | * documentation and/or other materials provided with the distribution. |
12 | * |
13 | * THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY |
14 | * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
15 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR |
16 | * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR |
17 | * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, |
18 | * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, |
19 | * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR |
20 | * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY |
21 | * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
22 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
23 | * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
24 | */ |
25 | |
26 | #pragma once |
27 | |
28 | #include <wtf/HashMap.h> |
29 | #include <wtf/RefCounted.h> |
30 | #include <wtf/text/StringHash.h> |
31 | #include <wtf/text/WTFString.h> |
32 | |
33 | namespace WebCore { |
34 | |
35 | class StorageMap : public RefCounted<StorageMap> { |
36 | public: |
37 | // Quota size measured in bytes. |
38 | WEBCORE_EXPORT static Ref<StorageMap> create(unsigned quotaSize); |
39 | |
40 | WEBCORE_EXPORT unsigned length() const; |
41 | WEBCORE_EXPORT String key(unsigned index); |
42 | WEBCORE_EXPORT String getItem(const String&) const; |
43 | WEBCORE_EXPORT RefPtr<StorageMap> setItem(const String& key, const String& value, String& oldValue, bool& quotaException); |
44 | WEBCORE_EXPORT RefPtr<StorageMap> setItemIgnoringQuota(const String& key, const String& value); |
45 | WEBCORE_EXPORT RefPtr<StorageMap> removeItem(const String&, String& oldValue); |
46 | |
47 | WEBCORE_EXPORT bool contains(const String& key) const; |
48 | |
49 | WEBCORE_EXPORT void importItems(const HashMap<String, String>&); |
50 | const HashMap<String, String>& items() const { return m_map; } |
51 | |
52 | unsigned quota() const { return m_quotaSize; } |
53 | |
54 | WEBCORE_EXPORT Ref<StorageMap> copy(); |
55 | |
56 | static const constexpr unsigned noQuota = UINT_MAX; |
57 | |
58 | private: |
59 | explicit StorageMap(unsigned quota); |
60 | void invalidateIterator(); |
61 | void setIteratorToIndex(unsigned); |
62 | |
63 | HashMap<String, String> m_map; |
64 | HashMap<String, String>::iterator m_iterator; |
65 | unsigned m_iteratorIndex; |
66 | |
67 | unsigned m_quotaSize; // Measured in bytes. |
68 | unsigned m_currentLength; // Measured in UChars. |
69 | }; |
70 | |
71 | } // namespace WebCore |
72 | |