Source/JavaScriptCore/runtime/JSObjectInlines.h

/*
 *  Copyright (C) 1999-2001 Harri Porten (porten@kde.org)
 *  Copyright (C) 2001 Peter Kelly (pmk@post.com)
 *  Copyright (C) 2003-2006, 2008, 2009, 2012-2015 Apple Inc. All rights reserved.
 *  Copyright (C) 2007 Eric Seidel (eric@webkit.org)
 *
 *  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.
 *
 */

#ifndef JSObjectInlines_h
#define JSObjectInlines_h

#include "Error.h"
#include "JSObject.h"
#include "Lookup.h"

namespace JSC {

// ECMA 8.6.2.2
ALWAYS_INLINE void JSObject::putInline(JSCell* cell, ExecState* exec, PropertyName propertyName, JSValue value, PutPropertySlot& slot)
{
    JSObject* thisObject = jsCast<JSObject*>(cell);
    ASSERT(value);
    ASSERT(!Heap::heap(value) || Heap::heap(value) == Heap::heap(thisObject));
    VM& vm = exec->vm();
    
    // Try indexed put first. This is required for correctness, since loads on property names that appear like
    // valid indices will never look in the named property storage.
    if (Optional<uint32_t> index = parseIndex(propertyName)) {
        putByIndex(thisObject, exec, index.value(), value, slot.isStrictMode());
        return;
    }
    
    // Check if there are any setters or getters in the prototype chain
    JSValue prototype;
    if (propertyName != exec->propertyNames().underscoreProto) {
        for (JSObject* obj = thisObject; !obj->structure(vm)->hasReadOnlyOrGetterSetterPropertiesExcludingProto(); obj = asObject(prototype)) {
            prototype = obj->prototype();
            if (prototype.isNull()) {
                ASSERT(!thisObject->structure(vm)->prototypeChainMayInterceptStoreTo(exec->vm(), propertyName));
                if (!thisObject->putDirectInternal<PutModePut>(vm, propertyName, value, 0, slot)
                    && slot.isStrictMode())
                    throwTypeError(exec, ASCIILiteral(StrictModeReadonlyPropertyWriteError));
                return;
            }
        }
    }

    thisObject->putInlineSlow(exec, propertyName, value, slot);
}

} // namespace JSC

#endif // JSObjectInlines_h