| /* |
| * Copyright (C) 2015 Apple Inc. All rights reserved. |
| * |
| * Redistribution and use in source and binary forms, with or without |
| * modification, are permitted provided that the following conditions |
| * are met: |
| * 1. Redistributions of source code must retain the above copyright |
| * notice, this list of conditions and the following disclaimer. |
| * 2. Redistributions in binary form must reproduce the above copyright |
| * notice, this list of conditions and the following disclaimer in the |
| * documentation and/or other materials provided with the distribution. |
| * |
| * THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY |
| * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
| * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR |
| * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR |
| * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, |
| * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, |
| * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR |
| * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY |
| * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
| * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| */ |
| |
| #pragma once |
| |
| #if ENABLE(INDEXED_DATABASE) |
| |
| #include "IDBKeyData.h" |
| |
| namespace WebCore { |
| |
| class ThreadSafeDataBuffer; |
| |
| enum class CursorDuplicity; |
| |
| namespace IDBServer { |
| |
| class IndexValueEntry { |
| WTF_MAKE_FAST_ALLOCATED; |
| public: |
| explicit IndexValueEntry(bool unique); |
| ~IndexValueEntry(); |
| |
| void addKey(const IDBKeyData&); |
| |
| // Returns true if a key was actually removed. |
| bool removeKey(const IDBKeyData&); |
| |
| const IDBKeyData* getLowest() const; |
| |
| uint64_t getCount() const; |
| |
| class Iterator { |
| public: |
| Iterator() |
| { |
| } |
| |
| Iterator(IndexValueEntry&); |
| Iterator(IndexValueEntry&, IDBKeyDataSet::iterator); |
| Iterator(IndexValueEntry&, IDBKeyDataSet::reverse_iterator); |
| |
| bool isValid() const; |
| void invalidate(); |
| |
| const IDBKeyData& key() const; |
| const ThreadSafeDataBuffer& value() const; |
| |
| Iterator& operator++(); |
| |
| private: |
| IndexValueEntry* m_entry { nullptr }; |
| bool m_forward { true }; |
| IDBKeyDataSet::iterator m_forwardIterator; |
| IDBKeyDataSet::reverse_iterator m_reverseIterator; |
| }; |
| |
| Iterator begin(); |
| Iterator reverseBegin(CursorDuplicity); |
| |
| // Finds the key, or the next higher record after the key. |
| Iterator find(const IDBKeyData&); |
| // Finds the key, or the next lowest record before the key. |
| Iterator reverseFind(const IDBKeyData&, CursorDuplicity); |
| |
| bool unique() const { return m_unique; } |
| |
| private: |
| union { |
| IDBKeyDataSet* m_orderedKeys; |
| IDBKeyData* m_key; |
| }; |
| |
| bool m_unique; |
| }; |
| |
| } // namespace IDBServer |
| } // namespace WebCore |
| |
| #endif // ENABLE(INDEXED_DATABASE) |