1 files changed, 48 insertions, 0 deletions
diff --git a/Source/WebCore/platform/graphics/IntPointHash.h b/Source/WebCore/platform/graphics/IntPointHash.h
new file mode 100644
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+++ b/Source/WebCore/platform/graphics/IntPointHash.h
@@ -0,0 +1,48 @@
+/*
+ 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