57 lines
2.7 KiB
C++
57 lines
2.7 KiB
C++
/*
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* Copyright (C) 2008 Google 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. ``AS IS'' AND ANY
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* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR
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* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
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* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
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* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
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* OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#pragma once
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#include <wtf/Forward.h>
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#include <wtf/Markable.h>
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#include <wtf/text/StringHash.h>
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namespace WebCore {
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using SharedStringHash = uint32_t;
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// This is a hash value, but it can be used as a key in HashMap. So, we need to avoid producing deleted-value in HashMap, which is -1.
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struct SharedStringHashHash {
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static unsigned hash(SharedStringHash key) { return static_cast<unsigned>(key); }
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static bool equal(SharedStringHash a, SharedStringHash b) { return a == b; }
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static const bool safeToCompareToEmptyOrDeleted = true;
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static constexpr SharedStringHash deletedValue = std::numeric_limits<SharedStringHash>::max();
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};
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using SharedStringHashMarkableTraits = IntegralMarkableTraits<SharedStringHash, SharedStringHashHash::deletedValue>;
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// Returns the hash of the string that will be used for visited link coloring.
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WEBCORE_EXPORT SharedStringHash computeSharedStringHash(const String& url);
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WEBCORE_EXPORT SharedStringHash computeSharedStringHash(const UChar* url, unsigned length);
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// Resolves the potentially relative URL "attributeURL" relative to the given
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// base URL, and returns the hash of the string that will be used for visited
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// link coloring. It will return the special value of 0 if attributeURL does not
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// look like a relative URL.
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SharedStringHash computeVisitedLinkHash(const URL& base, const AtomString& attributeURL);
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} // namespace WebCore
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