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/HashMap.h> 25 #include <wtf/HashSet.h> 26 27 namespace WTF { 28 29 template<> struct IntHash<WebCore::IntSize> { 30 static unsigned hash(const WebCore::IntSize& key) { return intHash((static_cast<uint64_t>(key.width()) << 32 | key.height())); } 31 static bool equal(const WebCore::IntSize& a, const WebCore::IntSize& b) { return a == b; } 32 static const bool safeToCompareToEmptyOrDeleted = true; 33 }; 34 template<> struct DefaultHash<WebCore::IntSize> { typedef IntHash<WebCore::IntSize> Hash; }; 35 36 template<> struct HashTraits<WebCore::IntSize> : GenericHashTraits<WebCore::IntSize> { 37 static const bool emptyValueIsZero = true; 38 static const bool needsDestruction = false; 39 static void constructDeletedValue(WebCore::IntSize& slot) { new (&slot) WebCore::IntSize(-1, -1); } 40 static bool isDeletedValue(const WebCore::IntSize& value) { return value.width() == -1 && value.height() == -1; } 41 }; 42 } // namespace WTF 43 44 #endif 45
