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      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 #include <wtf/Platform.h>
     27 
     28 #if ENABLE(WREC)
     29 
     30 #include "WRECGenerator.h"
     31 #include <wtf/unicode/Unicode.h>
     32 
     33 namespace JSC { namespace WREC {
     34 
     35     struct CharacterClass;
     36 
     37     class GenerateAtomFunctor {
     38     public:
     39         virtual ~GenerateAtomFunctor() {}
     40 
     41         virtual void generateAtom(Generator*, Generator::JumpList&) = 0;
     42         virtual void backtrack(Generator*) = 0;
     43     };
     44 
     45     class GeneratePatternCharacterFunctor : public GenerateAtomFunctor {
     46     public:
     47         GeneratePatternCharacterFunctor(const UChar ch)
     48             : m_ch(ch)
     49         {
     50         }
     51 
     52         virtual void generateAtom(Generator*, Generator::JumpList&);
     53         virtual void backtrack(Generator*);
     54 
     55     private:
     56         const UChar m_ch;
     57     };
     58 
     59     class GenerateCharacterClassFunctor : public GenerateAtomFunctor {
     60     public:
     61         GenerateCharacterClassFunctor(const CharacterClass* charClass, bool invert)
     62             : m_charClass(charClass)
     63             , m_invert(invert)
     64         {
     65         }
     66 
     67         virtual void generateAtom(Generator*, Generator::JumpList&);
     68         virtual void backtrack(Generator*);
     69 
     70     private:
     71         const CharacterClass* m_charClass;
     72         bool m_invert;
     73     };
     74 
     75     class GenerateBackreferenceFunctor : public GenerateAtomFunctor {
     76     public:
     77         GenerateBackreferenceFunctor(unsigned subpatternId)
     78             : m_subpatternId(subpatternId)
     79         {
     80         }
     81 
     82         virtual void generateAtom(Generator*, Generator::JumpList&);
     83         virtual void backtrack(Generator*);
     84 
     85     private:
     86         unsigned m_subpatternId;
     87     };
     88 
     89     class GenerateParenthesesNonGreedyFunctor : public GenerateAtomFunctor {
     90     public:
     91         GenerateParenthesesNonGreedyFunctor(Generator::Label start, Generator::Jump success, Generator::Jump fail)
     92             : m_start(start)
     93             , m_success(success)
     94             , m_fail(fail)
     95         {
     96         }
     97 
     98         virtual void generateAtom(Generator*, Generator::JumpList&);
     99         virtual void backtrack(Generator*);
    100 
    101     private:
    102         Generator::Label m_start;
    103         Generator::Jump m_success;
    104         Generator::Jump m_fail;
    105     };
    106 
    107 } } // namespace JSC::WREC
    108 
    109 #endif // ENABLE(WREC)
    110