1 files changed, 46 insertions, 0 deletions
diff --git a/Source/WebCore/platform/graphics/IntSizeHash.h b/Source/WebCore/platform/graphics/IntSizeHash.h
new file mode 100644
index 0000000..ad6eac3
--- /dev/null
+++ b/Source/WebCore/platform/graphics/IntSizeHash.h
@@ -0,0 +1,46 @@
+/*
+ * Copyright (C) 2006, 2008 Apple Inc. All rights reserved.
+ *
+ * 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 IntSizeHash_h
+#define IntSizeHash_h
+
+#include "IntSize.h"
+#include <wtf/HashMap.h>
+#include <wtf/HashSet.h>
+
+using WebCore::IntSize;
+
+namespace WTF {
+
+    template<> struct IntHash<IntSize> {
+        static unsigned hash(const IntSize& key) { return intHash((static_cast<uint64_t>(key.width()) << 32 | key.height())); }
+        static bool equal(const IntSize& a, const IntSize& b) { return a == b; }
+        static const bool safeToCompareToEmptyOrDeleted = true;
+    };
+    template<> struct DefaultHash<IntSize> { typedef IntHash<IntSize> Hash; };
+    
+    template<> struct HashTraits<IntSize> : GenericHashTraits<IntSize> {
+        static const bool emptyValueIsZero = true;
+        static const bool needsDestruction = false;
+        static void constructDeletedValue(IntSize& slot) { new (&slot) IntSize(-1, -1); }
+        static bool isDeletedValue(const IntSize& value) { return value.width() == -1 && value.height() == -1; }
+    };
+} // namespace WTF
+
+#endif