1/*
2 * Copyright (C) 2011 Apple Inc. All rights reserved.
3 *
4 * Redistribution and use in source and binary forms, with or without
5 * modification, are permitted provided that the following conditions
6 * are met:
7 * 1. Redistributions of source code must retain the above copyright
8 *    notice, this list of conditions and the following disclaimer.
9 * 2. Redistributions in binary form must reproduce the above copyright
10 *    notice, this list of conditions and the following disclaimer in the
11 *    documentation and/or other materials provided with the distribution.
12 *
13 * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
14 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
15 * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
16 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
17 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
18 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
19 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
20 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
21 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
22 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
23 * THE POSSIBILITY OF SUCH DAMAGE.
24 */
25
26#ifndef IntRectHash_h
27#define IntRectHash_h
28
29#include "IntPointHash.h"
30#include "IntRect.h"
31#include "IntSizeHash.h"
32#include <wtf/HashMap.h>
33#include <wtf/HashSet.h>
34
35namespace WTF {
36
37template<> struct IntHash<WebCore::IntRect> {
38    static unsigned hash(const WebCore::IntRect& key)
39    {
40        return pairIntHash(DefaultHash<WebCore::IntPoint>::Hash::hash(key.location()), DefaultHash<WebCore::IntSize>::Hash::hash(key.size()));
41    }
42    static bool equal(const WebCore::IntRect& a, const WebCore::IntRect& b)
43    {
44        return DefaultHash<WebCore::IntPoint>::Hash::equal(a.location(), b.location()) && DefaultHash<WebCore::IntSize>::Hash::equal(a.size(), b.size());
45    }
46    static const bool safeToCompareToEmptyOrDeleted = true;
47};
48template<> struct DefaultHash<WebCore::IntRect> { typedef IntHash<WebCore::IntRect> Hash; };
49
50template<> struct HashTraits<WebCore::IntRect> : GenericHashTraits<WebCore::IntRect> {
51    static const bool emptyValueIsZero = true;
52    static const bool needsDestruction = false;
53    static void constructDeletedValue(WebCore::IntRect& slot) { new (NotNull, &slot) WebCore::IntRect(-1, -1, -1, -1); }
54    static bool isDeletedValue(const WebCore::IntRect& value) { return value.x() == -1 && value.y() == -1 && value.width() == -1 && value.height() == -1; }
55};
56
57}
58
59#endif
60