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/*
* Copyright (C) 1999-2000 Harri Porten (porten@kde.org)
* Copyright (C) 2003-2023 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
* 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 "RegExpObject.h"
#include "RegExpObjectInlines.h"
namespace JSC {
STATIC_ASSERT_IS_TRIVIALLY_DESTRUCTIBLE(RegExpObject);
const ClassInfo RegExpObject::s_info = { "RegExp"_s, &Base::s_info, nullptr, nullptr, CREATE_METHOD_TABLE(RegExpObject) };
static JSC_DECLARE_CUSTOM_SETTER(regExpObjectSetLastIndexStrict);
static JSC_DECLARE_CUSTOM_SETTER(regExpObjectSetLastIndexSloppy);
RegExpObject::RegExpObject(VM& vm, Structure* structure, RegExp* regExp, bool areLegacyFeaturesEnabled)
: JSNonFinalObject(vm, structure)
, m_regExpAndFlags(std::bit_cast<uintptr_t>(regExp) | (areLegacyFeaturesEnabled ? 0 : legacyFeaturesDisabledFlag)) // lastIndexIsNotWritableFlag is not set.
{
m_lastIndex.setWithoutWriteBarrier(jsNumber(0));
}
#if ASSERT_ENABLED
void RegExpObject::finishCreation(VM& vm)
{
Base::finishCreation(vm);
ASSERT(inherits(info()));
ASSERT(type() == RegExpObjectType);
}
#endif
template<typename Visitor>
void RegExpObject::visitChildrenImpl(JSCell* cell, Visitor& visitor)
{
RegExpObject* thisObject = jsCast<RegExpObject*>(cell);
ASSERT_GC_OBJECT_INHERITS(thisObject, info());
Base::visitChildren(thisObject, visitor);
visitor.appendUnbarriered(thisObject->regExp());
visitor.append(thisObject->m_lastIndex);
}
DEFINE_VISIT_CHILDREN(RegExpObject);
bool RegExpObject::getOwnPropertySlot(JSObject* object, JSGlobalObject* globalObject, PropertyName propertyName, PropertySlot& slot)
{
VM& vm = globalObject->vm();
if (propertyName == vm.propertyNames->lastIndex) {
RegExpObject* regExp = jsCast<RegExpObject*>(object);
unsigned attributes = regExp->lastIndexIsWritable() ? PropertyAttribute::DontDelete | PropertyAttribute::DontEnum : PropertyAttribute::DontDelete | PropertyAttribute::DontEnum | PropertyAttribute::ReadOnly;
slot.setValue(regExp, attributes, regExp->getLastIndex());
return true;
}
return Base::getOwnPropertySlot(object, globalObject, propertyName, slot);
}
bool RegExpObject::deleteProperty(JSCell* cell, JSGlobalObject* globalObject, PropertyName propertyName, DeletePropertySlot& slot)
{
VM& vm = globalObject->vm();
if (propertyName == vm.propertyNames->lastIndex)
return false;
return Base::deleteProperty(cell, globalObject, propertyName, slot);
}
void RegExpObject::getOwnSpecialPropertyNames(JSObject*, JSGlobalObject* globalObject, PropertyNameArray& propertyNames, DontEnumPropertiesMode mode)
{
VM& vm = globalObject->vm();
if (mode == DontEnumPropertiesMode::Include)
propertyNames.add(vm.propertyNames->lastIndex);
}
bool RegExpObject::defineOwnProperty(JSObject* object, JSGlobalObject* globalObject, PropertyName propertyName, const PropertyDescriptor& descriptor, bool shouldThrow)
{
VM& vm = globalObject->vm();
auto scope = DECLARE_THROW_SCOPE(vm);
if (propertyName == vm.propertyNames->lastIndex) {
RegExpObject* regExp = jsCast<RegExpObject*>(object);
if (descriptor.configurablePresent() && descriptor.configurable())
return typeError(globalObject, scope, shouldThrow, UnconfigurablePropertyChangeConfigurabilityError);
if (descriptor.enumerablePresent() && descriptor.enumerable())
return typeError(globalObject, scope, shouldThrow, UnconfigurablePropertyChangeEnumerabilityError);
if (descriptor.isAccessorDescriptor())
return typeError(globalObject, scope, shouldThrow, UnconfigurablePropertyChangeAccessMechanismError);
if (!regExp->lastIndexIsWritable()) {
if (descriptor.writablePresent() && descriptor.writable())
return typeError(globalObject, scope, shouldThrow, UnconfigurablePropertyChangeWritabilityError);
if (descriptor.value()) {
bool isSame = sameValue(globalObject, regExp->getLastIndex(), descriptor.value());
RETURN_IF_EXCEPTION(scope, false);
if (!isSame)
return typeError(globalObject, scope, shouldThrow, ReadonlyPropertyChangeError);
}
return true;
}
if (descriptor.value()) {
regExp->setLastIndex(globalObject, descriptor.value(), false);
RETURN_IF_EXCEPTION(scope, false);
}
if (descriptor.writablePresent() && !descriptor.writable())
regExp->setLastIndexIsNotWritable();
return true;
}
RELEASE_AND_RETURN(scope, Base::defineOwnProperty(object, globalObject, propertyName, descriptor, shouldThrow));
}
JSC_DEFINE_CUSTOM_SETTER(regExpObjectSetLastIndexStrict, (JSGlobalObject* globalObject, EncodedJSValue thisValue, EncodedJSValue value, PropertyName))
{
return jsCast<RegExpObject*>(JSValue::decode(thisValue))->setLastIndex(globalObject, JSValue::decode(value), true);
}
JSC_DEFINE_CUSTOM_SETTER(regExpObjectSetLastIndexSloppy, (JSGlobalObject* globalObject, EncodedJSValue thisValue, EncodedJSValue value, PropertyName))
{
return jsCast<RegExpObject*>(JSValue::decode(thisValue))->setLastIndex(globalObject, JSValue::decode(value), false);
}
bool RegExpObject::put(JSCell* cell, JSGlobalObject* globalObject, PropertyName propertyName, JSValue value, PutPropertySlot& slot)
{
VM& vm = globalObject->vm();
auto scope = DECLARE_THROW_SCOPE(vm);
RegExpObject* thisObject = jsCast<RegExpObject*>(cell);
if (propertyName == vm.propertyNames->lastIndex) {
if (!thisObject->lastIndexIsWritable())
return typeError(globalObject, scope, slot.isStrictMode(), ReadonlyPropertyWriteError);
if (UNLIKELY(slot.thisValue() != thisObject))
RELEASE_AND_RETURN(scope, JSObject::definePropertyOnReceiver(globalObject, propertyName, value, slot));
bool result = thisObject->setLastIndex(globalObject, value, slot.isStrictMode());
RETURN_IF_EXCEPTION(scope, false);
slot.setCustomValue(thisObject, slot.isStrictMode()
? regExpObjectSetLastIndexStrict
: regExpObjectSetLastIndexSloppy);
return result;
}
RELEASE_AND_RETURN(scope, Base::put(cell, globalObject, propertyName, value, slot));
}
JSValue RegExpObject::exec(JSGlobalObject* globalObject, JSString* string)
{
return execInline(globalObject, string);
}
// Shared implementation used by test and exec.
MatchResult RegExpObject::match(JSGlobalObject* globalObject, JSString* string)
{
return matchInline(globalObject, string);
}
JSValue RegExpObject::matchGlobal(JSGlobalObject* globalObject, JSString* string)
{
VM& vm = globalObject->vm();
auto scope = DECLARE_THROW_SCOPE(vm);
RegExp* regExp = this->regExp();
ASSERT(regExp->global());
setLastIndex(globalObject, 0);
RETURN_IF_EXCEPTION(scope, { });
if (regExp->hasValidAtom()) {
if (string->isSubstring()) {
auto& cache = globalObject->regExpGlobalData().substringGlobalAtomCache();
RELEASE_AND_RETURN(scope, cache.collectMatches(globalObject, string->asRope(), regExp));
}
RELEASE_AND_RETURN(scope, collectGlobalAtomMatches(globalObject, string, regExp));
}
auto s = string->view(globalObject);
RETURN_IF_EXCEPTION(scope, { });
ASSERT(!s->isNull());
if (regExp->eitherUnicode()) {
unsigned stringLength = s->length();
RELEASE_AND_RETURN(scope, collectMatches(
vm, globalObject, string, s, regExp,
[&](size_t end) ALWAYS_INLINE_LAMBDA {
return advanceStringUnicode(s, stringLength, end);
}));
}
RELEASE_AND_RETURN(scope, collectMatches(
vm, globalObject, string, s, regExp,
[](size_t end) ALWAYS_INLINE_LAMBDA {
return end + 1;
}));
}
} // namespace JSC
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