blob: c58854389f9212264f90a2664f48633590a3f239 [file] [log] [blame]
/*
* Copyright (C) 2019 Sony Interactive Entertainment Inc.
*
* 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.
*
* THIS SOFTWARE IS PROVIDED BY APPLE INC. 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 INC. 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.
*/
#pragma once
#include <wtf/HashTraits.h>
#include <wtf/OptionSet.h>
namespace WTF {
template<typename T> struct DefaultHash<OptionSet<T>> {
struct Hash {
static unsigned hash(OptionSet<T> key)
{
return IntHash<typename OptionSet<T>::StorageType>::hash(key.toRaw());
}
static bool equal(OptionSet<T> a, OptionSet<T> b)
{
return a == b;
}
static constexpr bool safeToCompareToEmptyOrDeleted = true;
};
};
template<typename T> struct HashTraits<OptionSet<T>> : GenericHashTraits<OptionSet<T>> {
using StorageTraits = UnsignedWithZeroKeyHashTraits<typename OptionSet<T>::StorageType>;
static OptionSet<T> emptyValue()
{
return OptionSet<T>::fromRaw(StorageTraits::emptyValue());
}
static void constructDeletedValue(OptionSet<T>& slot)
{
typename OptionSet<T>::StorageType storage;
StorageTraits::constructDeletedValue(storage);
slot = OptionSet<T>::fromRaw(storage);
}
static bool isDeletedValue(OptionSet<T> value)
{
return StorageTraits::isDeletedValue(value.toRaw());
}
};
} // namespace WTF