mirror of
https://github.com/darlinghq/darling-WebCore.git
synced 2024-11-23 04:19:40 +00:00
125 lines
4.5 KiB
C++
125 lines
4.5 KiB
C++
/*
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* Copyright (C) 2018 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 "ProcessIdentifier.h"
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#include <wtf/DebugUtilities.h>
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#include <wtf/Hasher.h>
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#include <wtf/text/StringConcatenateNumbers.h>
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namespace WebCore {
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struct BackForwardItemIdentifier {
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ProcessIdentifier processIdentifier;
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enum ItemIdentifierType { };
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ObjectIdentifier<ItemIdentifierType> itemIdentifier;
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unsigned hash() const;
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explicit operator bool() const { return processIdentifier && itemIdentifier; }
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template<class Encoder> void encode(Encoder&) const;
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template<class Decoder> static Optional<BackForwardItemIdentifier> decode(Decoder&);
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String string() const { return makeString(processIdentifier.toUInt64(), '-', itemIdentifier.toUInt64()); }
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WEBCORE_EXPORT bool isValid() const;
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#if !LOG_DISABLED
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const char* logString() const;
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#endif
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};
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#if !LOG_DISABLED
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inline const char* BackForwardItemIdentifier::logString() const
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{
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return debugString(makeString(processIdentifier.toUInt64(), '-', itemIdentifier.toUInt64()));
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}
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#endif
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inline bool operator==(const BackForwardItemIdentifier& a, const BackForwardItemIdentifier& b)
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{
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return a.processIdentifier == b.processIdentifier && a.itemIdentifier == b.itemIdentifier;
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}
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inline bool operator!=(const BackForwardItemIdentifier& a, const BackForwardItemIdentifier& b)
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{
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return !(a == b);
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}
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template<class Encoder>
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void BackForwardItemIdentifier::encode(Encoder& encoder) const
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{
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encoder << processIdentifier << itemIdentifier;
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}
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template<class Decoder>
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Optional<BackForwardItemIdentifier> BackForwardItemIdentifier::decode(Decoder& decoder)
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{
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Optional<ProcessIdentifier> processIdentifier;
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decoder >> processIdentifier;
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if (!processIdentifier)
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return WTF::nullopt;
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Optional<ObjectIdentifier<ItemIdentifierType>> itemIdentifier;
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decoder >> itemIdentifier;
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if (!itemIdentifier)
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return WTF::nullopt;
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BackForwardItemIdentifier result = { WTFMove(*processIdentifier), WTFMove(*itemIdentifier) };
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if (!result.isValid())
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return WTF::nullopt;
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return result;
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}
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inline unsigned BackForwardItemIdentifier::hash() const
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{
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return computeHash(processIdentifier.toUInt64(), itemIdentifier.toUInt64());
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}
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} // namespace WebCore
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namespace WTF {
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struct BackForwardItemIdentifierHash {
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static unsigned hash(const WebCore::BackForwardItemIdentifier& key) { return key.hash(); }
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static bool equal(const WebCore::BackForwardItemIdentifier& a, const WebCore::BackForwardItemIdentifier& b) { return a == b; }
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static const bool safeToCompareToEmptyOrDeleted = true;
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};
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template<> struct HashTraits<WebCore::BackForwardItemIdentifier> : GenericHashTraits<WebCore::BackForwardItemIdentifier> {
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static WebCore::BackForwardItemIdentifier emptyValue() { return { }; }
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static void constructDeletedValue(WebCore::BackForwardItemIdentifier& slot) { slot.processIdentifier = ObjectIdentifier<WebCore::ProcessIdentifierType>(HashTableDeletedValue); }
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static bool isDeletedValue(const WebCore::BackForwardItemIdentifier& slot) { return slot.processIdentifier.toUInt64() == std::numeric_limits<uint64_t>::max(); }
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};
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template<> struct DefaultHash<WebCore::BackForwardItemIdentifier> : BackForwardItemIdentifierHash { };
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} // namespace WTF
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