/* | |
* Copyright (C) 2008 Apple Inc. 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 APPLE INC. ``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 APPLE INC. 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. | |
*/ | |
#ifndef Escapes_h | |
#define Escapes_h | |
#include <wtf/Platform.h> | |
#if ENABLE(WREC) | |
#include <wtf/Assertions.h> | |
namespace JSC { namespace WREC { | |
class CharacterClass; | |
class Escape { | |
public: | |
enum Type { | |
PatternCharacter, | |
CharacterClass, | |
Backreference, | |
WordBoundaryAssertion, | |
Error, | |
}; | |
Escape(Type type) | |
: m_type(type) | |
{ | |
} | |
Type type() const { return m_type; } | |
private: | |
Type m_type; | |
protected: | |
// Used by subclasses to store data. | |
union { | |
int i; | |
const WREC::CharacterClass* c; | |
} m_u; | |
bool m_invert; | |
}; | |
class PatternCharacterEscape : public Escape { | |
public: | |
static const PatternCharacterEscape& cast(const Escape& escape) | |
{ | |
ASSERT(escape.type() == PatternCharacter); | |
return static_cast<const PatternCharacterEscape&>(escape); | |
} | |
PatternCharacterEscape(int character) | |
: Escape(PatternCharacter) | |
{ | |
m_u.i = character; | |
} | |
operator Escape() const { return *this; } | |
int character() const { return m_u.i; } | |
}; | |
class CharacterClassEscape : public Escape { | |
public: | |
static const CharacterClassEscape& cast(const Escape& escape) | |
{ | |
ASSERT(escape.type() == CharacterClass); | |
return static_cast<const CharacterClassEscape&>(escape); | |
} | |
CharacterClassEscape(const WREC::CharacterClass& characterClass, bool invert) | |
: Escape(CharacterClass) | |
{ | |
m_u.c = &characterClass; | |
m_invert = invert; | |
} | |
operator Escape() { return *this; } | |
const WREC::CharacterClass& characterClass() const { return *m_u.c; } | |
bool invert() const { return m_invert; } | |
}; | |
class BackreferenceEscape : public Escape { | |
public: | |
static const BackreferenceEscape& cast(const Escape& escape) | |
{ | |
ASSERT(escape.type() == Backreference); | |
return static_cast<const BackreferenceEscape&>(escape); | |
} | |
BackreferenceEscape(int subpatternId) | |
: Escape(Backreference) | |
{ | |
m_u.i = subpatternId; | |
} | |
operator Escape() const { return *this; } | |
int subpatternId() const { return m_u.i; } | |
}; | |
class WordBoundaryAssertionEscape : public Escape { | |
public: | |
static const WordBoundaryAssertionEscape& cast(const Escape& escape) | |
{ | |
ASSERT(escape.type() == WordBoundaryAssertion); | |
return static_cast<const WordBoundaryAssertionEscape&>(escape); | |
} | |
WordBoundaryAssertionEscape(bool invert) | |
: Escape(WordBoundaryAssertion) | |
{ | |
m_invert = invert; | |
} | |
operator Escape() const { return *this; } | |
bool invert() const { return m_invert; } | |
}; | |
} } // namespace JSC::WREC | |
#endif // ENABLE(WREC) | |
#endif // Escapes_h |