1/*
2 * Copyright (C) 2006, 2008 Apple Inc. All rights reserved.
3 *
4 * This library is free software; you can redistribute it and/or
5 * modify it under the terms of the GNU Library General Public
6 * License as published by the Free Software Foundation; either
7 * version 2 of the License, or (at your option) any later version.
8 *
9 * This library is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12 * Library General Public License for more details.
13 *
14 * You should have received a copy of the GNU Library General Public License
15 * along with this library; see the file COPYING.LIB. If not, write to
16 * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
17 * Boston, MA 02110-1301, USA.
18 *
19 */
20#ifndef IntSizeHash_h
21#define IntSizeHash_h
22
23#include "IntSize.h"
24#include <wtf/HashTraits.h>
25
26namespace WTF {
27
28 template<> struct IntHash<WebCore::IntSize> {
29 static unsigned hash(const WebCore::IntSize& key) { return pairIntHash(key.width(), key.height()); }
30 static bool equal(const WebCore::IntSize& a, const WebCore::IntSize& b) { return a == b; }
31 static const bool safeToCompareToEmptyOrDeleted = true;
32 };
33 template<> struct DefaultHash<WebCore::IntSize> { typedef IntHash<WebCore::IntSize> Hash; };
34
35 template<> struct HashTraits<WebCore::IntSize> : GenericHashTraits<WebCore::IntSize> {
36 static const bool emptyValueIsZero = true;
37 static void constructDeletedValue(WebCore::IntSize& slot) { new (NotNull, &slot) WebCore::IntSize(-1, -1); }
38 static bool isDeletedValue(const WebCore::IntSize& value) { return value.width() == -1 && value.height() == -1; }
39 };
40} // namespace WTF
41
42#endif
43