| /* |
| * Copyright (C) 2008 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. |
| * 3. Neither the name of Apple Computer, Inc. ("Apple") nor the names of |
| * its contributors may be used to endorse or promote products derived |
| * from this software without specific prior written permission. |
| * |
| * THIS SOFTWARE IS PROVIDED BY APPLE AND ITS CONTRIBUTORS "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 OR ITS 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. |
| */ |
| |
| #ifndef AtomicStringHash_h |
| #define AtomicStringHash_h |
| |
| #include "AtomicString.h" |
| #include <wtf/HashTraits.h> |
| |
| namespace WebCore { |
| |
| struct AtomicStringHash { |
| static unsigned hash(const AtomicString& key) |
| { |
| return key.impl()->existingHash(); |
| } |
| |
| static bool equal(const AtomicString& a, const AtomicString& b) |
| { |
| return a == b; |
| } |
| |
| static const bool safeToCompareToEmptyOrDeleted = false; |
| }; |
| |
| } |
| |
| namespace WTF { |
| |
| // WebCore::AtomicStringHash is the default hash for AtomicString |
| template<> struct HashTraits<WebCore::AtomicString> : GenericHashTraits<WebCore::AtomicString> { |
| static const bool emptyValueIsZero = true; |
| static void constructDeletedValue(WebCore::AtomicString& slot) { new (&slot) WebCore::AtomicString(HashTableDeletedValue); } |
| static bool isDeletedValue(const WebCore::AtomicString& slot) { return slot.isHashTableDeletedValue(); } |
| }; |
| |
| } |
| |
| #endif |