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/*
* Copyright (C) 1999-2000 Harri Porten (porten@kde.org)
* Copyright (C) 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 Library 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
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public License
* along with this library; see the file COPYING.LIB. If not, write to
* the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
* Boston, MA 02110-1301, USA.
*
*/
#include "config.h"
#include "Operations.h"
#include "Error.h"
#include "JSCInlines.h"
#include "JSObject.h"
#include "JSString.h"
#include <wtf/MathExtras.h>
namespace JSC {
bool JSValue::equalSlowCase(ExecState* exec, JSValue v1, JSValue v2)
{
return equalSlowCaseInline(exec, v1, v2);
}
bool JSValue::strictEqualSlowCase(ExecState* exec, JSValue v1, JSValue v2)
{
return strictEqualSlowCaseInline(exec, v1, v2);
}
NEVER_INLINE JSValue jsAddSlowCase(CallFrame* callFrame, JSValue v1, JSValue v2)
{
// exception for the Date exception in defaultValue()
VM& vm = callFrame->vm();
auto scope = DECLARE_THROW_SCOPE(vm);
JSValue p1 = v1.toPrimitive(callFrame);
RETURN_IF_EXCEPTION(scope, { });
JSValue p2 = v2.toPrimitive(callFrame);
RETURN_IF_EXCEPTION(scope, { });
if (p1.isString()) {
JSString* p2String = p2.toString(callFrame);
RETURN_IF_EXCEPTION(scope, { });
scope.release();
return jsString(callFrame, asString(p1), p2String);
}
if (p2.isString()) {
JSString* p1String = p1.toString(callFrame);
RETURN_IF_EXCEPTION(scope, { });
scope.release();
return jsString(callFrame, p1String, asString(p2));
}
double p1Number = p1.toNumber(callFrame);
RETURN_IF_EXCEPTION(scope, { });
scope.release();
return jsNumber(p1Number + p2.toNumber(callFrame));
}
JSValue jsTypeStringForValue(VM& vm, JSGlobalObject* globalObject, JSValue v)
{
if (v.isUndefined())
return vm.smallStrings.undefinedString();
if (v.isBoolean())
return vm.smallStrings.booleanString();
if (v.isNumber())
return vm.smallStrings.numberString();
if (v.isString())
return vm.smallStrings.stringString();
if (v.isSymbol())
return vm.smallStrings.symbolString();
if (v.isObject()) {
JSObject* object = asObject(v);
// Return "undefined" for objects that should be treated
// as null when doing comparisons.
if (object->structure(vm)->masqueradesAsUndefined(globalObject))
return vm.smallStrings.undefinedString();
if (object->type() == JSFunctionType)
return vm.smallStrings.functionString();
if (object->inlineTypeFlags() & TypeOfShouldCallGetCallData) {
CallData callData;
JSObject* object = asObject(v);
if (object->methodTable(vm)->getCallData(object, callData) != CallType::None)
return vm.smallStrings.functionString();
}
}
return vm.smallStrings.objectString();
}
JSValue jsTypeStringForValue(CallFrame* callFrame, JSValue v)
{
return jsTypeStringForValue(callFrame->vm(), callFrame->lexicalGlobalObject(), v);
}
bool jsIsObjectTypeOrNull(CallFrame* callFrame, JSValue v)
{
VM& vm = callFrame->vm();
if (!v.isCell())
return v.isNull();
JSType type = v.asCell()->type();
if (type == StringType || type == SymbolType)
return false;
if (type >= ObjectType) {
if (asObject(v)->structure(vm)->masqueradesAsUndefined(callFrame->lexicalGlobalObject()))
return false;
CallData callData;
JSObject* object = asObject(v);
if (object->methodTable(vm)->getCallData(object, callData) != CallType::None)
return false;
}
return true;
}
bool jsIsFunctionType(JSValue v)
{
if (v.isObject()) {
CallData callData;
JSObject* object = asObject(v);
if (object->methodTable()->getCallData(object, callData) != CallType::None)
return true;
}
return false;
}
size_t normalizePrototypeChain(CallFrame* callFrame, Structure* structure)
{
VM& vm = callFrame->vm();
size_t count = 0;
while (1) {
if (structure->isProxy())
return InvalidPrototypeChain;
JSValue v = structure->prototypeForLookup(callFrame);
if (v.isNull())
return count;
JSCell* base = v.asCell();
structure = base->structure(vm);
if (structure->isDictionary()) {
if (structure->hasBeenFlattenedBefore())
return InvalidPrototypeChain;
structure->flattenDictionaryStructure(vm, asObject(base));
}
++count;
}
}
} // namespace JSC
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