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/*
Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies)
This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Library General Public
License as published by the Free Software Foundation; either
version 2 of the License, or (at your option) any later version.
This library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Library General Public License for more details.
You should have received a copy of the GNU Library General Public License
along with this library; see the file COPYING.LIB. If not, write to
the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
Boston, MA 02110-1301, USA.
*/
#ifndef IntPointHash_h
#define IntPointHash_h
#include "IntPoint.h"
#include <wtf/HashFunctions.h>
#include <wtf/HashTraits.h>
namespace WTF {
// The empty value is (0, INT_MIN), the deleted value is (INT_MIN, 0)
struct IntPointHash {
static unsigned hash(const WebCore::IntPoint& p) { return WTF::intHash(static_cast<uint64_t>(p.x()) << 32 | p.y()); }
static bool equal(const WebCore::IntPoint& a, const WebCore::IntPoint& b) { return a == b; }
static const bool safeToCompareToEmptyOrDeleted = true;
};
template<> struct HashTraits<WebCore::IntPoint> : GenericHashTraits<WebCore::IntPoint> {
static const bool needsDestruction = false;
static WebCore::IntPoint emptyValue() { return WebCore::IntPoint(0, std::numeric_limits<int>::min()); }
static void constructDeletedValue(WebCore::IntPoint& slot) { slot = WebCore::IntPoint(std::numeric_limits<int>::min(), 0); }
static bool isDeletedValue(const WebCore::IntPoint& slot) { return slot == WebCore::IntPoint(std::numeric_limits<int>::min(), 0); }
};
template<> struct DefaultHash<WebCore::IntPoint> {
typedef IntPointHash Hash;
};
}
#endif
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