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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/FixedArray.h>
#include <wtf/OwnPtr.h>
namespace JSC {
class JSGlobalData;
class JSString;
class MarkStack;
class SmallStringsStorage;
class SmallStrings {
WTF_MAKE_NONCOPYABLE(SmallStrings); WTF_MAKE_FAST_ALLOCATED;
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];
}
StringImpl* singleCharacterStringRep(unsigned char character);
void markChildren(MarkStack&);
void clear();
unsigned count() const;
#if ENABLE(JIT)
JSString** singleCharacterStrings() { return m_singleCharacterStrings.data(); }
#endif
private:
void createEmptyString(JSGlobalData*);
void createSingleCharacterString(JSGlobalData*, unsigned char);
JSString* m_emptyString;
FixedArray<JSString*, 0x100> m_singleCharacterStrings;
OwnPtr<SmallStringsStorage> m_storage;
};
} // namespace JSC
#endif // SmallStrings_h
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