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 35 namespace WTF { 36 37 template<> struct IntHash<WebCore::IntRect> { 38 static unsigned hash(const WebCore::IntRect& key) 39 { 40 return intHash(static_cast<uint64_t>(DefaultHash<WebCore::IntPoint>::Hash::hash(key.location())) << 32 | 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 }; 48 template<> struct DefaultHash<WebCore::IntRect> { typedef IntHash<WebCore::IntRect> Hash; }; 49 50 template<> 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 (&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
