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
33namespace WebCore {
34
35class StorageMap : public RefCounted<StorageMap> {
36public:
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
58private:
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