/* | |
* 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 | |
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* 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 |