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Commit	Line	Data
	1	/*
	2	* Copyright (C) 1999-2000 Harri Porten (porten@kde.org)
	3	* Copyright (C) 2003, 2007, 2008 Apple Inc. All Rights Reserved.
	4	*
	5	* This library is free software; you can redistribute it and/or
	6	* modify it under the terms of the GNU Lesser General Public
	7	* License as published by the Free Software Foundation; either
	8	* version 2 of the License, or (at your option) any later version.
	9	*
	10	* This library is distributed in the hope that it will be useful,
	11	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	12	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
	13	* Lesser General Public License for more details.
	14	*
	15	* You should have received a copy of the GNU Lesser General Public
	16	* License along with this library; if not, write to the Free Software
	17	* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
	18	*
	19	*/
	20
	21	#ifndef RegExpConstructor_h
	22	#define RegExpConstructor_h
	23
	24	#include "InternalFunction.h"
	25	#include "RegExp.h"
	26	#include "RegExpCachedResult.h"
	27	#include "RegExpObject.h"
	28	#include <wtf/OwnPtr.h>
	29
	30
	31	namespace JSC {
	32
	33	class RegExpPrototype;
	34
	35	class RegExpConstructor : public InternalFunction {
	36	public:
	37	typedef InternalFunction Base;
	38
	39	static RegExpConstructor* create(ExecState* exec, JSGlobalObject* globalObject, Structure* structure, RegExpPrototype* regExpPrototype)
	40	{
	41	RegExpConstructor* constructor = new (NotNull, allocateCell<RegExpConstructor>(*exec->heap())) RegExpConstructor(globalObject, structure, regExpPrototype);
	42	constructor->finishCreation(exec, regExpPrototype);
	43	return constructor;
	44	}
	45
	46	static Structure* createStructure(JSGlobalData& globalData, JSGlobalObject* globalObject, JSValue prototype)
	47	{
	48	return Structure::create(globalData, globalObject, prototype, TypeInfo(ObjectType, StructureFlags), &s_info);
	49	}
	50
	51	static void put(JSCell, ExecState, const Identifier& propertyName, JSValue, PutPropertySlot&);
	52
	53	static bool getOwnPropertySlot(JSCell, ExecState, const Identifier& propertyName, PropertySlot&);
	54	static bool getOwnPropertyDescriptor(JSObject, ExecState, const Identifier&, PropertyDescriptor&);
	55
	56	static const ClassInfo s_info;
	57
	58	MatchResult performMatch(JSGlobalData&, RegExp, JSString, const UString&, int startOffset, int** ovector);
	59	MatchResult performMatch(JSGlobalData&, RegExp, JSString, const UString&, int startOffset);
	60
	61	void setMultiline(bool multiline) { m_multiline = multiline; }
	62	bool multiline() const { return m_multiline; }
	63
	64	JSValue getBackref(ExecState*, unsigned);
	65	JSValue getLastParen(ExecState*);
	66	JSValue getLeftContext(ExecState*);
	67	JSValue getRightContext(ExecState*);
	68
	69	void setInput(ExecState* exec, JSString* string) { m_cachedResult.setInput(exec, this, string); }
	70	JSString* input() { return m_cachedResult.input(); }
	71
	72	static void visitChildren(JSCell*, SlotVisitor&);
	73
	74	protected:
	75	void finishCreation(ExecState, RegExpPrototype);
	76	static const unsigned StructureFlags = OverridesGetOwnPropertySlot \| OverridesVisitChildren \| Base::StructureFlags;
	77
	78	private:
	79	RegExpConstructor(JSGlobalObject, Structure, RegExpPrototype*);
	80	static void destroy(JSCell*);
	81	static ConstructType getConstructData(JSCell*, ConstructData&);
	82	static CallType getCallData(JSCell*, CallData&);
	83
	84	RegExpCachedResult m_cachedResult;
	85	bool m_multiline;
	86	Vector<int, 32> m_ovector;
	87	};
	88
	89	RegExpConstructor* asRegExpConstructor(JSValue);
	90
	91	JSObject* constructRegExp(ExecState, JSGlobalObject, const ArgList&, bool callAsConstructor = false);
	92
	93	inline RegExpConstructor* asRegExpConstructor(JSValue value)
	94	{
	95	ASSERT(asObject(value)->inherits(&RegExpConstructor::s_info));
	96	return static_cast<RegExpConstructor*>(asObject(value));
	97	}
	98
	99	/*
	100	To facilitate result caching, exec(), test(), match(), search(), and replace() dipatch regular
	101	expression matching through the performMatch function. We use cached results to calculate,
	102	e.g., RegExp.lastMatch and RegExp.leftParen.
	103	*/
	104	ALWAYS_INLINE MatchResult RegExpConstructor::performMatch(JSGlobalData& globalData, RegExp* regExp, JSString* string, const UString& input, int startOffset, int** ovector)
	105	{
	106	int position = regExp->match(globalData, input, startOffset, m_ovector);
	107
	108	if (ovector)
	109	*ovector = m_ovector.data();
	110
	111	if (position == -1)
	112	return MatchResult::failed();
	113
	114	ASSERT(!m_ovector.isEmpty());
	115	ASSERT(m_ovector[0] == position);
	116	ASSERT(m_ovector[1] >= position);
	117	size_t end = m_ovector[1];
	118
	119	m_cachedResult.record(globalData, this, regExp, string, MatchResult(position, end));
	120
	121	return MatchResult(position, end);
	122	}
	123	ALWAYS_INLINE MatchResult RegExpConstructor::performMatch(JSGlobalData& globalData, RegExp* regExp, JSString* string, const UString& input, int startOffset)
	124	{
	125	MatchResult result = regExp->match(globalData, input, startOffset);
	126	if (result)
	127	m_cachedResult.record(globalData, this, regExp, string, result);
	128	return result;
	129	}
	130
	131	} // namespace JSC
	132
	133	#endif // RegExpConstructor_h