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#ifndef StorageMap_h
27#define StorageMap_h
28
29#if ENABLE(DOM_STORAGE)
30
31#include "PlatformString.h"
32#include <wtf/HashMap.h>
33#include <wtf/PassRefPtr.h>
34#include <wtf/RefCounted.h>
35#include <wtf/text/StringHash.h>
36
37namespace WebCore {
38
39    class StorageMap : public RefCounted<StorageMap> {
40    public:
41        // Quota size measured in bytes.
42        static PassRefPtr<StorageMap> create(unsigned quotaSize);
43
44        unsigned length() const;
45        String key(unsigned index);
46        String getItem(const String&) const;
47        PassRefPtr<StorageMap> setItem(const String& key, const String& value, String& oldValue, bool& quota_exception);
48        PassRefPtr<StorageMap> removeItem(const String&, String& oldValue);
49
50        bool contains(const String& key) const;
51
52        void importItem(const String& key, const String& value);
53
54        unsigned quota() const { return m_quotaSize; }
55
56        static const unsigned noQuota = UINT_MAX;
57
58    private:
59        StorageMap(unsigned quota);
60        PassRefPtr<StorageMap> copy();
61        void invalidateIterator();
62        void setIteratorToIndex(unsigned);
63
64        HashMap<String, String> m_map;
65        HashMap<String, String>::iterator m_iterator;
66        unsigned m_iteratorIndex;
67
68        unsigned m_quotaSize;  // Measured in bytes.
69        unsigned m_currentLength;  // Measured in UChars.
70    };
71
72} // namespace WebCore
73
74#endif // ENABLE(DOM_STORAGE)
75
76#endif // StorageMap_h
77