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/*
* 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 THIRD_PARTY_BLINK_RENDERER_PLATFORM_WTF_TEXT_ATOMIC_STRING_HASH_H_
#define THIRD_PARTY_BLINK_RENDERER_PLATFORM_WTF_TEXT_ATOMIC_STRING_HASH_H_
#include "third_party/blink/renderer/platform/wtf/hash_traits.h"
#include "third_party/blink/renderer/platform/wtf/text/atomic_string.h"
#include "third_party/blink/renderer/platform/wtf/text/string_hash.h"
namespace WTF {
template <>
struct HashTraits<AtomicString> : SimpleClassHashTraits<AtomicString> {
static unsigned GetHash(const AtomicString& key) { return key.Hash(); }
static constexpr bool kSafeToCompareToEmptyOrDeleted = false;
// Unlike other types, we can return a const reference for AtomicString's
// empty value (g_null_atom).
typedef const AtomicString& PeekOutType;
static const AtomicString& EmptyValue() { return g_null_atom; }
static PeekOutType Peek(const AtomicString& value) { return value; }
static bool IsEmptyValue(const AtomicString& value) { return value.IsNull(); }
static bool IsDeletedValue(const AtomicString& value) {
return HashTraits<String>::IsDeletedValue(value.string_);
}
static void ConstructDeletedValue(AtomicString& slot) {
HashTraits<String>::ConstructDeletedValue(slot.string_);
}
};
} // namespace WTF
#endif // THIRD_PARTY_BLINK_RENDERER_PLATFORM_WTF_TEXT_ATOMIC_STRING_HASH_H_
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