| 1 | /*
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| 2 | * Copyright (C) 2008 Apple Inc. All Rights Reserved.
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| 3 | *
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| 4 | * Redistribution and use in source and binary forms, with or without
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| 5 | * modification, are permitted provided that the following conditions
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| 6 | * are met:
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| 7 | * 1. Redistributions of source code must retain the above copyright
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| 8 | * notice, this list of conditions and the following disclaimer.
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| 9 | * 2. Redistributions in binary form must reproduce the above copyright
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| 10 | * notice, this list of conditions and the following disclaimer in the
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| 11 | * documentation and/or other materials provided with the distribution.
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| 12 | *
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| 13 | * THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY
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| 14 | * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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| 15 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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| 16 | * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR
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| 17 | * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
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| 18 | * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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| 19 | * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
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| 20 | * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
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| 21 | * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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| 22 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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| 23 | * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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| 24 | */
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| 25 |
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| 26 | #ifndef SmallStrings_h
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| 27 | #define SmallStrings_h
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| 28 |
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| 29 | #include "UString.h"
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| 30 | #include <wtf/OwnPtr.h>
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| 31 |
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| 32 | namespace JSC {
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| 33 |
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| 34 | class JSGlobalData;
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| 35 | class JSString;
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| 36 |
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| 37 | class SmallStringsStorage;
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| 38 |
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| 39 | class SmallStrings : Noncopyable {
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| 40 | public:
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| 41 | SmallStrings();
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| 42 | ~SmallStrings();
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| 43 |
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| 44 | JSString* emptyString(JSGlobalData* globalData)
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| 45 | {
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| 46 | if (!m_emptyString)
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| 47 | createEmptyString(globalData);
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| 48 | return m_emptyString;
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| 49 | }
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| 50 | JSString* singleCharacterString(JSGlobalData* globalData, unsigned char character)
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| 51 | {
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| 52 | if (!m_singleCharacterStrings[character])
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| 53 | createSingleCharacterString(globalData, character);
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| 54 | return m_singleCharacterStrings[character];
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| 55 | }
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| 56 |
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| 57 | UString::Rep* singleCharacterStringRep(unsigned char character);
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| 58 |
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| 59 | void mark();
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| 60 |
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| 61 | unsigned count() const;
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| 62 |
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| 63 | private:
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| 64 | void createEmptyString(JSGlobalData*);
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| 65 | void createSingleCharacterString(JSGlobalData*, unsigned char);
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| 66 |
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| 67 | JSString* m_emptyString;
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| 68 | JSString* m_singleCharacterStrings[0x100];
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| 69 | OwnPtr<SmallStringsStorage> m_storage;
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| 70 | };
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| 71 |
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| 72 | } // namespace JSC
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| 73 |
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| 74 | #endif // SmallStrings_h
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