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* Copyright (C) 1999-2000 Harri Porten (
* Copyright (C) 2003, 2007-2008, 2016 Apple Inc. All Rights Reserved.
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser 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
* Lesser General Public License for more details.
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
#pragma once
#include "InternalFunction.h"
#include "RegExp.h"
#include "RegExpCachedResult.h"
#include "RegExpObject.h"
namespace JSC {
class RegExpPrototype;
class GetterSetter;
class RegExpConstructor : public InternalFunction {
typedef InternalFunction Base;
static const unsigned StructureFlags = Base::StructureFlags | HasStaticPropertyTable;
static RegExpConstructor* create(VM& vm, Structure* structure, RegExpPrototype* regExpPrototype, GetterSetter* species)
RegExpConstructor* constructor = new (NotNull, allocateCell<RegExpConstructor>(vm.heap)) RegExpConstructor(vm, structure, regExpPrototype);
constructor->finishCreation(vm, regExpPrototype, species);
return constructor;
static Structure* createStructure(VM& vm, JSGlobalObject* globalObject, JSValue prototype)
return Structure::create(vm, globalObject, prototype, TypeInfo(ObjectType, StructureFlags), info());
MatchResult performMatch(VM&, RegExp*, JSString*, const String&, int startOffset, int** ovector);
MatchResult performMatch(VM&, RegExp*, JSString*, const String&, int startOffset);
void recordMatch(VM&, RegExp*, JSString*, const MatchResult&);
void setMultiline(bool multiline) { m_multiline = multiline; }
bool multiline() const { return m_multiline; }
JSValue getBackref(ExecState*, unsigned);
JSValue getLastParen(ExecState*);
JSValue getLeftContext(ExecState*);
JSValue getRightContext(ExecState*);
void setInput(ExecState* exec, JSString* string) { m_cachedResult.setInput(exec, this, string); }
JSString* input() { return m_cachedResult.input(); }
static void visitChildren(JSCell*, SlotVisitor&);
static ptrdiff_t offsetOfCachedResult() { return OBJECT_OFFSETOF(RegExpConstructor, m_cachedResult); }
void finishCreation(VM&, RegExpPrototype*, GetterSetter* species);
RegExpConstructor(VM&, Structure*, RegExpPrototype*);
static void destroy(JSCell*);
static ConstructType getConstructData(JSCell*, ConstructData&);
static CallType getCallData(JSCell*, CallData&);
RegExpCachedResult m_cachedResult;
bool m_multiline;
Vector<int> m_ovector;
RegExpConstructor* asRegExpConstructor(JSValue);
JSObject* constructRegExp(ExecState*, JSGlobalObject*, const ArgList&, JSObject* callee = nullptr, JSValue newTarget = jsUndefined());
inline RegExpConstructor* asRegExpConstructor(JSValue value)
ASSERT(asObject(value)->inherits(*value.getObject()->vm(), RegExpConstructor::info()));
return static_cast<RegExpConstructor*>(asObject(value));
To facilitate result caching, exec(), test(), match(), search(), and replace() dipatch regular
expression matching through the performMatch function. We use cached results to calculate,
e.g., RegExp.lastMatch and RegExp.leftParen.
ALWAYS_INLINE MatchResult RegExpConstructor::performMatch(VM& vm, RegExp* regExp, JSString* string, const String& input, int startOffset, int** ovector)
int position = regExp->match(vm, input, startOffset, m_ovector);
if (ovector)
*ovector =;
if (position == -1)
return MatchResult::failed();
ASSERT(m_ovector[0] == position);
ASSERT(m_ovector[1] >= position);
size_t end = m_ovector[1];
m_cachedResult.record(vm, this, regExp, string, MatchResult(position, end));
return MatchResult(position, end);
ALWAYS_INLINE MatchResult RegExpConstructor::performMatch(VM& vm, RegExp* regExp, JSString* string, const String& input, int startOffset)
MatchResult result = regExp->match(vm, input, startOffset);
if (result)
m_cachedResult.record(vm, this, regExp, string, result);
return result;
ALWAYS_INLINE void RegExpConstructor::recordMatch(VM& vm, RegExp* regExp, JSString* string, const MatchResult& result)
m_cachedResult.record(vm, this, regExp, string, result);
ALWAYS_INLINE bool isRegExp(VM& vm, ExecState* exec, JSValue value)
auto scope = DECLARE_THROW_SCOPE(vm);
if (!value.isObject())
return false;
JSObject* object = asObject(value);
JSValue matchValue = object->get(exec, vm.propertyNames->matchSymbol);
RETURN_IF_EXCEPTION(scope, false);
if (!matchValue.isUndefined())
return matchValue.toBoolean(exec);
return object->inherits(vm, RegExpObject::info());
EncodedJSValue JSC_HOST_CALL esSpecRegExpCreate(ExecState*);
} // namespace JSC