JavaScriptCore-621.1.tar.gz

[apple/javascriptcore.git] / runtime / RegExpCache.h

diff --git a/runtime/RegExpCache.h b/runtime/RegExpCache.h
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+/*
+ * Copyright (C) 2010 University of Szeged
+ * Copyright (C) 2010 Renata Hodovan (hodovan@inf.u-szeged.hu)
+ * 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 UNIVERSITY OF SZEGED ``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 UNIVERSITY OF SZEGED 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.
+ */
+
+#include "RegExp.h"
+#include "RegExpKey.h"
+#include "UString.h"
+
+#ifndef RegExpCache_h
+#define RegExpCache_h
+
+namespace JSC {
+
+class RegExpCache {
+public:
+    PassRefPtr<RegExp> lookupOrCreate(const UString& patternString, const UString& flags);
+    PassRefPtr<RegExp> create(const UString& patternString, const UString& flags);
+    RegExpCache(JSGlobalData* globalData);
+
+private:
+    static const unsigned maxCacheablePatternLength = 256;
+    static const int maxCacheableEntries = 256;
+
+    typedef HashMap<RegExpKey, RefPtr<RegExp> > RegExpCacheMap;
+    RegExpKey patternKeyArray[maxCacheableEntries];
+    RegExpCacheMap m_cacheMap;
+    JSGlobalData* m_globalData;
+    int m_nextKeyToEvict;
+    bool m_isFull;
+};
+
+} // namespace JSC
+
+#endif // RegExpCache_h