94 lines
3.1 KiB
C++
94 lines
3.1 KiB
C++
/*
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* Copyright (C) 2015 Apple Inc. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
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* THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
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* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
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* THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#pragma once
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#include <wtf/Hasher.h>
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#include <wtf/Vector.h>
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namespace WebCore {
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namespace ContentExtensions {
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struct HashableActionList {
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enum DeletedValueTag { DeletedValue };
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explicit HashableActionList(DeletedValueTag) { state = Deleted; }
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enum EmptyValueTag { EmptyValue };
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explicit HashableActionList(EmptyValueTag) { state = Empty; }
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template<typename AnyVectorType>
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explicit HashableActionList(const AnyVectorType& otherActions)
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: actions(otherActions)
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, state(Valid)
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{
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std::sort(actions.begin(), actions.end());
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StringHasher hasher;
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hasher.addCharactersAssumingAligned(reinterpret_cast<const UChar*>(actions.data()), actions.size() * sizeof(uint64_t) / sizeof(UChar));
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hash = hasher.hash();
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}
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bool isEmptyValue() const { return state == Empty; }
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bool isDeletedValue() const { return state == Deleted; }
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bool operator==(const HashableActionList& other) const
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{
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return state == other.state && actions == other.actions;
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}
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bool operator!=(const HashableActionList& other) const
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{
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return !(*this == other);
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}
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Vector<uint64_t> actions;
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unsigned hash;
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enum {
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Valid,
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Empty,
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Deleted
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} state;
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};
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struct HashableActionListHash {
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static unsigned hash(const HashableActionList& actionKey)
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{
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return actionKey.hash;
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}
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static bool equal(const HashableActionList& a, const HashableActionList& b)
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{
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return a == b;
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}
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static const bool safeToCompareToEmptyOrDeleted = false;
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};
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struct HashableActionListHashTraits : public WTF::CustomHashTraits<HashableActionList> {
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static const bool emptyValueIsZero = false;
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};
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} // namespace ContentExtensions
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} // namespace WebCore
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