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+/*
+ * Copyright (C) 2008, 2009 Apple Inc. All Rights Reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY
+ * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR
+ * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
+ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
+ * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
+ * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
+ * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#ifndef SmallStrings_h
+#define SmallStrings_h
+
+#include "UString.h"
+#include <wtf/OwnPtr.h>
+
+namespace JSC {
+
+ class JSGlobalData;
+ class JSString;
+ class MarkStack;
+ class SmallStringsStorage;
+
+ class SmallStrings : public Noncopyable {
+ public:
+ SmallStrings();
+ ~SmallStrings();
+
+ JSString* emptyString(JSGlobalData* globalData)
+ {
+ if (!m_emptyString)
+ createEmptyString(globalData);
+ return m_emptyString;
+ }
+ JSString* singleCharacterString(JSGlobalData* globalData, unsigned char character)
+ {
+ if (!m_singleCharacterStrings[character])
+ createSingleCharacterString(globalData, character);
+ return m_singleCharacterStrings[character];
+ }
+
+ UString::Rep* singleCharacterStringRep(unsigned char character);
+
+ void markChildren(MarkStack&);
+
+ unsigned count() const;
+
+ private:
+ void createEmptyString(JSGlobalData*);
+ void createSingleCharacterString(JSGlobalData*, unsigned char);
+
+ JSString* m_emptyString;
+ JSString* m_singleCharacterStrings[0x100];
+ OwnPtr<SmallStringsStorage> m_storage;
+ };
+
+} // namespace JSC
+
+#endif // SmallStrings_h