1 /* 2 * Copyright (C) 2008 Apple Inc. All Rights Reserved. 3 * 4 * Redistribution and use in source and binary forms, with or without 5 * modification, are permitted provided that the following conditions 6 * are met: 7 * 1. Redistributions of source code must retain the above copyright 8 * notice, this list of conditions and the following disclaimer. 9 * 2. Redistributions in binary form must reproduce the above copyright 10 * notice, this list of conditions and the following disclaimer in the 11 * documentation and/or other materials provided with the distribution. 12 * 13 * THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY 14 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 15 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 16 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR 17 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, 18 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, 19 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR 20 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY 21 * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 22 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 23 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 24 */ 25 26 #ifndef SmallStrings_h 27 #define SmallStrings_h 28 29 #include "UString.h" 30 #include <wtf/OwnPtr.h> 31 32 namespace JSC { 33 34 class JSGlobalData; 35 class JSString; 36 37 class SmallStringsStorage; 38 39 class SmallStrings : Noncopyable { 40 public: 41 SmallStrings(); 42 ~SmallStrings(); 43 emptyString(JSGlobalData * globalData)44 JSString* emptyString(JSGlobalData* globalData) 45 { 46 if (!m_emptyString) 47 createEmptyString(globalData); 48 return m_emptyString; 49 } singleCharacterString(JSGlobalData * globalData,unsigned char character)50 JSString* singleCharacterString(JSGlobalData* globalData, unsigned char character) 51 { 52 if (!m_singleCharacterStrings[character]) 53 createSingleCharacterString(globalData, character); 54 return m_singleCharacterStrings[character]; 55 } 56 57 UString::Rep* singleCharacterStringRep(unsigned char character); 58 59 void mark(); 60 61 unsigned count() const; 62 63 private: 64 void createEmptyString(JSGlobalData*); 65 void createSingleCharacterString(JSGlobalData*, unsigned char); 66 67 JSString* m_emptyString; 68 JSString* m_singleCharacterStrings[0x100]; 69 OwnPtr<SmallStringsStorage> m_storage; 70 }; 71 72 } // namespace JSC 73 74 #endif // SmallStrings_h 75