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 37 namespace 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 quota()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