1 /* 2 * Copyright (C) 2010 University of Szeged 3 * Copyright (C) 2010 Renata Hodovan (hodovan (at) inf.u-szeged.hu) 4 * All rights reserved. 5 * 6 * Redistribution and use in source and binary forms, with or without 7 * modification, are permitted provided that the following conditions 8 * are met: 9 * 1. Redistributions of source code must retain the above copyright 10 * notice, this list of conditions and the following disclaimer. 11 * 2. Redistributions in binary form must reproduce the above copyright 12 * notice, this list of conditions and the following disclaimer in the 13 * documentation and/or other materials provided with the distribution. 14 * 15 * THIS SOFTWARE IS PROVIDED BY UNIVERSITY OF SZEGED ``AS IS'' AND ANY 16 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 17 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 18 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL UNIVERSITY OF SZEGED OR 19 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, 20 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, 21 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR 22 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY 23 * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 24 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 25 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 26 */ 27 28 #include "RegExp.h" 29 #include "RegExpKey.h" 30 #include "UString.h" 31 #include <wtf/FixedArray.h> 32 #include <wtf/HashMap.h> 33 34 #ifndef RegExpCache_h 35 #define RegExpCache_h 36 37 namespace JSC { 38 39 class RegExpCache { 40 41 typedef HashMap<RegExpKey, RefPtr<RegExp> > RegExpCacheMap; 42 43 public: 44 PassRefPtr<RegExp> lookupOrCreate(const UString& patternString, RegExpFlags); 45 PassRefPtr<RegExp> create(const UString& patternString, RegExpFlags, RegExpCacheMap::iterator); 46 RegExpCache(JSGlobalData* globalData); 47 48 private: 49 static const unsigned maxCacheablePatternLength = 256; 50 51 #if PLATFORM(IOS) 52 // The RegExpCache can currently hold onto multiple Mb of memory; 53 // as a short-term fix some embedded platforms may wish to reduce the cache size. 54 static const int maxCacheableEntries = 32; 55 #else 56 static const int maxCacheableEntries = 256; 57 #endif 58 59 FixedArray<RegExpKey, maxCacheableEntries> patternKeyArray; 60 RegExpCacheMap m_cacheMap; 61 JSGlobalData* m_globalData; 62 int m_nextKeyToEvict; 63 bool m_isFull; 64 }; 65 66 } // namespace JSC 67 68 #endif // RegExpCache_h 69
