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diff --git a/Source/JavaScriptCore/parser/Lexer.h b/Source/JavaScriptCore/parser/Lexer.h
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+/*
+ *  Copyright (C) 1999-2000 Harri Porten (porten@kde.org)
+ *  Copyright (C) 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009 Apple Inc. All rights reserved.
+ *  Copyright (C) 2010 Zoltan Herczeg (zherczeg@inf.u-szeged.hu)
+ *
+ *  This library is free software; you can redistribute it and/or
+ *  modify it under the terms of the GNU Library General Public
+ *  License as published by the Free Software Foundation; either
+ *  version 2 of the License, or (at your option) any later version.
+ *
+ *  This library is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ *  Library General Public License for more details.
+ *
+ *  You should have received a copy of the GNU Library General Public License
+ *  along with this library; see the file COPYING.LIB.  If not, write to
+ *  the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
+ *  Boston, MA 02110-1301, USA.
+ *
+ */
+
+#ifndef Lexer_h
+#define Lexer_h
+
+#include "JSParser.h"
+#include "Lookup.h"
+#include "ParserArena.h"
+#include "SourceCode.h"
+#include <wtf/ASCIICType.h>
+#include <wtf/AlwaysInline.h>
+#include <wtf/SegmentedVector.h>
+#include <wtf/Vector.h>
+#include <wtf/unicode/Unicode.h>
+
+namespace JSC {
+
+    class RegExp;
+
+    class Lexer : public Noncopyable {
+    public:
+        // Character manipulation functions.
+        static bool isWhiteSpace(int character);
+        static bool isLineTerminator(int character);
+        static unsigned char convertHex(int c1, int c2);
+        static UChar convertUnicode(int c1, int c2, int c3, int c4);
+
+        // Functions to set up parsing.
+        void setCode(const SourceCode&, ParserArena&);
+        void setIsReparsing() { m_isReparsing = true; }
+        bool isReparsing() const { return m_isReparsing; }
+
+        // Functions for the parser itself.
+        enum LexType { IdentifyReservedWords, IgnoreReservedWords };
+        JSTokenType lex(JSTokenData* lvalp, JSTokenInfo* llocp, LexType, bool strictMode);
+        int lineNumber() const { return m_lineNumber; }
+        void setLastLineNumber(int lastLineNumber) { m_lastLineNumber = lastLineNumber; }
+        int lastLineNumber() const { return m_lastLineNumber; }
+        bool prevTerminator() const { return m_terminator; }
+        SourceCode sourceCode(int openBrace, int closeBrace, int firstLine);
+        bool scanRegExp(const Identifier*& pattern, const Identifier*& flags, UChar patternPrefix = 0);
+        bool skipRegExp();
+
+        // Functions for use after parsing.
+        bool sawError() const { return m_error; }
+        void clear();
+        int currentOffset() { return m_code - m_codeStart; }
+        void setOffset(int offset)
+        {
+            m_code = m_codeStart + offset;
+            m_current = *m_code;
+        }
+
+    private:
+        friend class JSGlobalData;
+
+        Lexer(JSGlobalData*);
+        ~Lexer();
+
+        void record8(int);
+        void record16(int);
+        void record16(UChar);
+
+        void copyCodeWithoutBOMs();
+
+        ALWAYS_INLINE void shift();
+        ALWAYS_INLINE int peek(int offset);
+        int getUnicodeCharacter();
+        void shiftLineTerminator();
+
+        ALWAYS_INLINE const UChar* currentCharacter() const;
+        ALWAYS_INLINE int currentOffset() const;
+
+        ALWAYS_INLINE const Identifier* makeIdentifier(const UChar* characters, size_t length);
+
+        ALWAYS_INLINE bool lastTokenWasRestrKeyword() const;
+
+        ALWAYS_INLINE JSTokenType parseIdentifier(JSTokenData*, LexType);
+        ALWAYS_INLINE bool parseString(JSTokenData* lvalp, bool strictMode);
+        ALWAYS_INLINE void parseHex(double& returnValue);
+        ALWAYS_INLINE bool parseOctal(double& returnValue);
+        ALWAYS_INLINE bool parseDecimal(double& returnValue);
+        ALWAYS_INLINE void parseNumberAfterDecimalPoint();
+        ALWAYS_INLINE bool parseNumberAfterExponentIndicator();
+        ALWAYS_INLINE bool parseMultilineComment();
+
+        static const size_t initialReadBufferCapacity = 32;
+
+        int m_lineNumber;
+        int m_lastLineNumber;
+
+        Vector<char> m_buffer8;
+        Vector<UChar> m_buffer16;
+        bool m_terminator;
+        bool m_delimited; // encountered delimiter like "'" and "}" on last run
+        int m_lastToken;
+
+        const SourceCode* m_source;
+        const UChar* m_code;
+        const UChar* m_codeStart;
+        const UChar* m_codeEnd;
+        bool m_isReparsing;
+        bool m_atLineStart;
+        bool m_error;
+
+        // current and following unicode characters (int to allow for -1 for end-of-file marker)
+        int m_current;
+
+        IdentifierArena* m_arena;
+
+        JSGlobalData* m_globalData;
+
+        const HashTable m_keywordTable;
+    };
+
+    inline bool Lexer::isWhiteSpace(int ch)
+    {
+        return isASCII(ch) ? (ch == ' ' || ch == '\t' || ch == 0xB || ch == 0xC) : (WTF::Unicode::isSeparatorSpace(ch) || ch == 0xFEFF);
+    }
+
+    inline bool Lexer::isLineTerminator(int ch)
+    {
+        return ch == '\r' || ch == '\n' || (ch & ~1) == 0x2028;
+    }
+
+    inline unsigned char Lexer::convertHex(int c1, int c2)
+    {
+        return (toASCIIHexValue(c1) << 4) | toASCIIHexValue(c2);
+    }
+
+    inline UChar Lexer::convertUnicode(int c1, int c2, int c3, int c4)
+    {
+        return (convertHex(c1, c2) << 8) | convertHex(c3, c4);
+    }
+
+} // namespace JSC
+
+#endif // Lexer_h