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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 <wtf/OwnPtr.h>
	27
	28	namespace JSC {
	29
	30	class RegExp;
	31	class RegExpPrototype;
	32	struct RegExpConstructorPrivate;
	33
	34	struct RegExpConstructorPrivate : FastAllocBase {
	35	// Global search cache / settings
	36	RegExpConstructorPrivate()
	37	: lastNumSubPatterns(0)
	38	, multiline(false)
	39	, lastOvectorIndex(0)
	40	{
	41	}
	42
	43	const Vector<int, 32>& lastOvector() const { return ovector[lastOvectorIndex]; }
	44	Vector<int, 32>& lastOvector() { return ovector[lastOvectorIndex]; }
	45	Vector<int, 32>& tempOvector() { return ovector[lastOvectorIndex ? 0 : 1]; }
	46	void changeLastOvector() { lastOvectorIndex = lastOvectorIndex ? 0 : 1; }
	47
	48	UString input;
	49	UString lastInput;
	50	Vector<int, 32> ovector[2];
	51	unsigned lastNumSubPatterns : 30;
	52	bool multiline : 1;
	53	unsigned lastOvectorIndex : 1;
	54	};
	55
	56	class RegExpConstructor : public InternalFunction {
	57	public:
	58	RegExpConstructor(ExecState, NonNullPassRefPtr<Structure>, RegExpPrototype);
	59
	60	static PassRefPtr<Structure> createStructure(JSValue prototype)
	61	{
	62	return Structure::create(prototype, TypeInfo(ObjectType, StructureFlags), AnonymousSlotCount);
	63	}
	64
	65	virtual void put(ExecState*, const Identifier& propertyName, JSValue, PutPropertySlot&);
	66	virtual bool getOwnPropertySlot(ExecState*, const Identifier& propertyName, PropertySlot&);
	67	virtual bool getOwnPropertyDescriptor(ExecState*, const Identifier&, PropertyDescriptor&);
	68
	69	static const ClassInfo info;
	70
	71	void performMatch(RegExp, const UString&, int startOffset, int& position, int& length, int* ovector = 0);
	72	JSObject* arrayOfMatches(ExecState*) const;
	73
	74	void setInput(const UString&);
	75	const UString& input() const;
	76
	77	void setMultiline(bool);
	78	bool multiline() const;
	79
	80	JSValue getBackref(ExecState*, unsigned) const;
	81	JSValue getLastParen(ExecState*) const;
	82	JSValue getLeftContext(ExecState*) const;
	83	JSValue getRightContext(ExecState*) const;
	84
	85	protected:
	86	static const unsigned StructureFlags = OverridesGetOwnPropertySlot \| ImplementsHasInstance \| InternalFunction::StructureFlags;
	87
	88	private:
	89	virtual ConstructType getConstructData(ConstructData&);
	90	virtual CallType getCallData(CallData&);
	91
	92	virtual const ClassInfo* classInfo() const { return &info; }
	93
	94	OwnPtr<RegExpConstructorPrivate> d;
	95	};
	96
	97	RegExpConstructor* asRegExpConstructor(JSValue);
	98
	99	JSObject* constructRegExp(ExecState*, const ArgList&);
	100
	101	inline RegExpConstructor* asRegExpConstructor(JSValue value)
	102	{
	103	ASSERT(asObject(value)->inherits(&RegExpConstructor::info));
	104	return static_cast<RegExpConstructor*>(asObject(value));
	105	}
	106
	107	/*
	108	To facilitate result caching, exec(), test(), match(), search(), and replace() dipatch regular
	109	expression matching through the performMatch function. We use cached results to calculate,
	110	e.g., RegExp.lastMatch and RegExp.leftParen.
	111	*/
	112	inline void RegExpConstructor::performMatch(RegExp* r, const UString& s, int startOffset, int& position, int& length, int** ovector)
	113	{
	114	position = r->match(s, startOffset, &d->tempOvector());
	115
	116	if (ovector)
	117	*ovector = d->tempOvector().data();
	118
	119	if (position != -1) {
	120	ASSERT(!d->tempOvector().isEmpty());
	121
	122	length = d->tempOvector()[1] - d->tempOvector()[0];
	123
	124	d->input = s;
	125	d->lastInput = s;
	126	d->changeLastOvector();
	127	d->lastNumSubPatterns = r->numSubpatterns();
	128	}
	129	}
	130
	131	} // namespace JSC
	132
	133	#endif // RegExpConstructor_h