blob: 7b93df1dbf572d64c5e040532fbfc95fd9729298 [file] [log] [blame]
/*
* Copyright (C) 1999-2000 Harri Porten (porten@kde.org)
* Copyright (C) 2003, 2007-2008, 2016 Apple Inc. All Rights Reserved.
* Copyright (C) 2009 Torch Mobile, Inc.
*
* 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
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* 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
*
*/
#include "config.h"
#include "RegExpConstructor.h"
#include "Error.h"
#include "GetterSetter.h"
#include "JSCInlines.h"
#include "RegExpPrototype.h"
#include "StructureInlines.h"
namespace JSC {
static EncodedJSValue regExpConstructorInput(ExecState*, EncodedJSValue, PropertyName);
static EncodedJSValue regExpConstructorMultiline(ExecState*, EncodedJSValue, PropertyName);
static EncodedJSValue regExpConstructorLastMatch(ExecState*, EncodedJSValue, PropertyName);
static EncodedJSValue regExpConstructorLastParen(ExecState*, EncodedJSValue, PropertyName);
static EncodedJSValue regExpConstructorLeftContext(ExecState*, EncodedJSValue, PropertyName);
static EncodedJSValue regExpConstructorRightContext(ExecState*, EncodedJSValue, PropertyName);
template<int N>
static EncodedJSValue regExpConstructorDollar(ExecState*, EncodedJSValue, PropertyName);
static bool setRegExpConstructorInput(ExecState*, EncodedJSValue, EncodedJSValue);
static bool setRegExpConstructorMultiline(ExecState*, EncodedJSValue, EncodedJSValue);
} // namespace JSC
#include "RegExpConstructor.lut.h"
namespace JSC {
const ClassInfo RegExpConstructor::s_info = { "Function", &InternalFunction::s_info, &regExpConstructorTable, nullptr, CREATE_METHOD_TABLE(RegExpConstructor) };
/* Source for RegExpConstructor.lut.h
@begin regExpConstructorTable
input regExpConstructorInput None
$_ regExpConstructorInput DontEnum
multiline regExpConstructorMultiline None
$* regExpConstructorMultiline DontEnum
lastMatch regExpConstructorLastMatch DontDelete|ReadOnly
$& regExpConstructorLastMatch DontDelete|ReadOnly|DontEnum
lastParen regExpConstructorLastParen DontDelete|ReadOnly
$+ regExpConstructorLastParen DontDelete|ReadOnly|DontEnum
leftContext regExpConstructorLeftContext DontDelete|ReadOnly
$` regExpConstructorLeftContext DontDelete|ReadOnly|DontEnum
rightContext regExpConstructorRightContext DontDelete|ReadOnly
$' regExpConstructorRightContext DontDelete|ReadOnly|DontEnum
$1 regExpConstructorDollar<1> DontDelete|ReadOnly
$2 regExpConstructorDollar<2> DontDelete|ReadOnly
$3 regExpConstructorDollar<3> DontDelete|ReadOnly
$4 regExpConstructorDollar<4> DontDelete|ReadOnly
$5 regExpConstructorDollar<5> DontDelete|ReadOnly
$6 regExpConstructorDollar<6> DontDelete|ReadOnly
$7 regExpConstructorDollar<7> DontDelete|ReadOnly
$8 regExpConstructorDollar<8> DontDelete|ReadOnly
$9 regExpConstructorDollar<9> DontDelete|ReadOnly
@end
*/
static EncodedJSValue JSC_HOST_CALL callRegExpConstructor(ExecState*);
static EncodedJSValue JSC_HOST_CALL constructWithRegExpConstructor(ExecState*);
RegExpConstructor::RegExpConstructor(VM& vm, Structure* structure, RegExpPrototype* regExpPrototype)
: InternalFunction(vm, structure, callRegExpConstructor, constructWithRegExpConstructor)
, m_cachedResult(vm, this, regExpPrototype->emptyRegExp())
, m_multiline(false)
{
}
void RegExpConstructor::finishCreation(VM& vm, RegExpPrototype* regExpPrototype, GetterSetter* speciesSymbol)
{
Base::finishCreation(vm, ASCIILiteral("RegExp"));
ASSERT(inherits(vm, info()));
putDirectWithoutTransition(vm, vm.propertyNames->prototype, regExpPrototype, PropertyAttribute::DontEnum | PropertyAttribute::DontDelete | PropertyAttribute::ReadOnly);
putDirectWithoutTransition(vm, vm.propertyNames->length, jsNumber(2), PropertyAttribute::ReadOnly | PropertyAttribute::DontEnum);
putDirectNonIndexAccessor(vm, vm.propertyNames->speciesSymbol, speciesSymbol, PropertyAttribute::Accessor | PropertyAttribute::ReadOnly | PropertyAttribute::DontEnum);
}
void RegExpConstructor::destroy(JSCell* cell)
{
static_cast<RegExpConstructor*>(cell)->RegExpConstructor::~RegExpConstructor();
}
void RegExpConstructor::visitChildren(JSCell* cell, SlotVisitor& visitor)
{
RegExpConstructor* thisObject = jsCast<RegExpConstructor*>(cell);
ASSERT_GC_OBJECT_INHERITS(thisObject, info());
Base::visitChildren(thisObject, visitor);
thisObject->m_cachedResult.visitChildren(visitor);
}
JSValue RegExpConstructor::getBackref(ExecState* exec, unsigned i)
{
JSArray* array = m_cachedResult.lastResult(exec, this);
if (i < array->length()) {
JSValue result = JSValue(array).get(exec, i);
ASSERT(result.isString() || result.isUndefined());
if (!result.isUndefined())
return result;
}
return jsEmptyString(exec);
}
JSValue RegExpConstructor::getLastParen(ExecState* exec)
{
JSArray* array = m_cachedResult.lastResult(exec, this);
unsigned length = array->length();
if (length > 1) {
JSValue result = JSValue(array).get(exec, length - 1);
ASSERT(result.isString() || result.isUndefined());
if (!result.isUndefined())
return result;
}
return jsEmptyString(exec);
}
JSValue RegExpConstructor::getLeftContext(ExecState* exec)
{
return m_cachedResult.leftContext(exec, this);
}
JSValue RegExpConstructor::getRightContext(ExecState* exec)
{
return m_cachedResult.rightContext(exec, this);
}
template<int N>
EncodedJSValue regExpConstructorDollar(ExecState* exec, EncodedJSValue thisValue, PropertyName)
{
return JSValue::encode(jsCast<RegExpConstructor*>(JSValue::decode(thisValue))->getBackref(exec, N));
}
EncodedJSValue regExpConstructorInput(ExecState*, EncodedJSValue thisValue, PropertyName)
{
return JSValue::encode(jsCast<RegExpConstructor*>(JSValue::decode(thisValue))->input());
}
EncodedJSValue regExpConstructorMultiline(ExecState*, EncodedJSValue thisValue, PropertyName)
{
return JSValue::encode(jsBoolean(jsCast<RegExpConstructor*>(JSValue::decode(thisValue))->multiline()));
}
EncodedJSValue regExpConstructorLastMatch(ExecState* exec, EncodedJSValue thisValue, PropertyName)
{
return JSValue::encode(jsCast<RegExpConstructor*>(JSValue::decode(thisValue))->getBackref(exec, 0));
}
EncodedJSValue regExpConstructorLastParen(ExecState* exec, EncodedJSValue thisValue, PropertyName)
{
return JSValue::encode(jsCast<RegExpConstructor*>(JSValue::decode(thisValue))->getLastParen(exec));
}
EncodedJSValue regExpConstructorLeftContext(ExecState* exec, EncodedJSValue thisValue, PropertyName)
{
return JSValue::encode(jsCast<RegExpConstructor*>(JSValue::decode(thisValue))->getLeftContext(exec));
}
EncodedJSValue regExpConstructorRightContext(ExecState* exec, EncodedJSValue thisValue, PropertyName)
{
return JSValue::encode(jsCast<RegExpConstructor*>(JSValue::decode(thisValue))->getRightContext(exec));
}
bool setRegExpConstructorInput(ExecState* exec, EncodedJSValue thisValue, EncodedJSValue value)
{
if (auto constructor = jsDynamicCast<RegExpConstructor*>(exec->vm(), JSValue::decode(thisValue))) {
constructor->setInput(exec, JSValue::decode(value).toString(exec));
return true;
}
return false;
}
bool setRegExpConstructorMultiline(ExecState* exec, EncodedJSValue thisValue, EncodedJSValue value)
{
if (auto constructor = jsDynamicCast<RegExpConstructor*>(exec->vm(), JSValue::decode(thisValue))) {
constructor->setMultiline(JSValue::decode(value).toBoolean(exec));
return true;
}
return false;
}
inline Structure* getRegExpStructure(ExecState* exec, JSGlobalObject* globalObject, JSValue newTarget)
{
Structure* structure = globalObject->regExpStructure();
if (newTarget != jsUndefined())
structure = InternalFunction::createSubclassStructure(exec, newTarget, structure);
return structure;
}
inline RegExpFlags toFlags(ExecState* exec, JSValue flags)
{
VM& vm = exec->vm();
auto scope = DECLARE_THROW_SCOPE(vm);
if (flags.isUndefined())
return NoFlags;
JSString* flagsString = flags.toStringOrNull(exec);
EXCEPTION_ASSERT(!!scope.exception() == !flagsString);
if (UNLIKELY(!flagsString))
return InvalidFlags;
RegExpFlags result = regExpFlags(flagsString->value(exec));
RETURN_IF_EXCEPTION(scope, InvalidFlags);
if (result == InvalidFlags)
throwSyntaxError(exec, scope, ASCIILiteral("Invalid flags supplied to RegExp constructor."));
return result;
}
static JSObject* regExpCreate(ExecState* exec, JSGlobalObject* globalObject, JSValue newTarget, JSValue patternArg, JSValue flagsArg)
{
VM& vm = exec->vm();
auto scope = DECLARE_THROW_SCOPE(vm);
String pattern = patternArg.isUndefined() ? emptyString() : patternArg.toWTFString(exec);
RETURN_IF_EXCEPTION(scope, nullptr);
RegExpFlags flags = toFlags(exec, flagsArg);
EXCEPTION_ASSERT(!!scope.exception() == (flags == InvalidFlags));
if (UNLIKELY(flags == InvalidFlags))
return nullptr;
RegExp* regExp = RegExp::create(vm, pattern, flags);
if (!regExp->isValid())
return throwException(exec, scope, createSyntaxError(exec, regExp->errorMessage()));
Structure* structure = getRegExpStructure(exec, globalObject, newTarget);
RETURN_IF_EXCEPTION(scope, nullptr);
return RegExpObject::create(vm, structure, regExp);
}
JSObject* constructRegExp(ExecState* exec, JSGlobalObject* globalObject, const ArgList& args, JSObject* callee, JSValue newTarget)
{
VM& vm = exec->vm();
auto scope = DECLARE_THROW_SCOPE(vm);
JSValue patternArg = args.at(0);
JSValue flagsArg = args.at(1);
bool isPatternRegExp = patternArg.inherits<RegExpObject>(vm);
bool constructAsRegexp = isRegExp(vm, exec, patternArg);
RETURN_IF_EXCEPTION(scope, nullptr);
if (newTarget.isUndefined() && constructAsRegexp && flagsArg.isUndefined()) {
JSValue constructor = patternArg.get(exec, vm.propertyNames->constructor);
RETURN_IF_EXCEPTION(scope, nullptr);
if (callee == constructor) {
// We know that patternArg is a object otherwise constructAsRegexp would be false.
return patternArg.getObject();
}
}
if (isPatternRegExp) {
RegExp* regExp = jsCast<RegExpObject*>(patternArg)->regExp();
Structure* structure = getRegExpStructure(exec, globalObject, newTarget);
RETURN_IF_EXCEPTION(scope, nullptr);
if (!flagsArg.isUndefined()) {
RegExpFlags flags = toFlags(exec, flagsArg);
EXCEPTION_ASSERT(!!scope.exception() == (flags == InvalidFlags));
if (flags == InvalidFlags)
return nullptr;
regExp = RegExp::create(vm, regExp->pattern(), flags);
}
return RegExpObject::create(vm, structure, regExp);
}
if (constructAsRegexp) {
JSValue pattern = patternArg.get(exec, vm.propertyNames->source);
RETURN_IF_EXCEPTION(scope, nullptr);
if (flagsArg.isUndefined()) {
flagsArg = patternArg.get(exec, vm.propertyNames->flags);
RETURN_IF_EXCEPTION(scope, nullptr);
}
patternArg = pattern;
}
scope.release();
return regExpCreate(exec, globalObject, newTarget, patternArg, flagsArg);
}
EncodedJSValue JSC_HOST_CALL esSpecRegExpCreate(ExecState* exec)
{
JSGlobalObject* globalObject = exec->lexicalGlobalObject();
JSValue patternArg = exec->argument(0);
JSValue flagsArg = exec->argument(1);
return JSValue::encode(regExpCreate(exec, globalObject, jsUndefined(), patternArg, flagsArg));
}
static EncodedJSValue JSC_HOST_CALL constructWithRegExpConstructor(ExecState* exec)
{
ArgList args(exec);
return JSValue::encode(constructRegExp(exec, jsCast<InternalFunction*>(exec->jsCallee())->globalObject(), args, exec->jsCallee(), exec->newTarget()));
}
static EncodedJSValue JSC_HOST_CALL callRegExpConstructor(ExecState* exec)
{
ArgList args(exec);
return JSValue::encode(constructRegExp(exec, jsCast<InternalFunction*>(exec->jsCallee())->globalObject(), args, exec->jsCallee()));
}
} // namespace JSC