Beispiel #1
0
// Section 8.12.9
bool Object::__defineOwnProperty__(ExecutionEngine *engine, String *name, const Property *p, PropertyAttributes attrs)
{
    uint idx = name->asArrayIndex();
    if (idx != UINT_MAX)
        return __defineOwnProperty__(engine, idx, p, attrs);

    Scope scope(engine);
    name->makeIdentifier();

    uint memberIndex;

    if (isArrayObject() && name->equals(engine->id_length())) {
        Q_ASSERT(Heap::ArrayObject::LengthPropertyIndex == internalClass()->find(engine->id_length()));
        ScopedProperty lp(scope);
        PropertyAttributes cattrs;
        getProperty(Heap::ArrayObject::LengthPropertyIndex, lp, &cattrs);
        if (attrs.isEmpty() || p->isSubset(attrs, lp, cattrs))
            return true;
        if (!cattrs.isWritable() || attrs.type() == PropertyAttributes::Accessor || attrs.isConfigurable() || attrs.isEnumerable())
            goto reject;
        bool succeeded = true;
        if (attrs.type() == PropertyAttributes::Data) {
            bool ok;
            uint l = p->value.asArrayLength(&ok);
            if (!ok) {
                ScopedValue v(scope, p->value);
                engine->throwRangeError(v);
                return false;
            }
            succeeded = setArrayLength(l);
        }
        if (attrs.hasWritable() && !attrs.isWritable()) {
            cattrs.setWritable(false);
            InternalClass::changeMember(this, engine->id_length(), cattrs);
        }
        if (!succeeded)
            goto reject;
        return true;
    }

    // Clause 1
    memberIndex = internalClass()->find(name->identifier());

    if (memberIndex == UINT_MAX) {
        // clause 3
        if (!isExtensible())
            goto reject;
        // clause 4
        ScopedProperty pd(scope);
        pd->copy(p, attrs);
        pd->fullyPopulated(&attrs);
        insertMember(name, pd, attrs);
        return true;
    }

    return __defineOwnProperty__(engine, memberIndex, name, p, attrs);
reject:
  if (engine->current->strictMode)
      engine->throwTypeError();
  return false;
}
// Section 8.12.9
bool Object::__defineOwnProperty__(ExecutionContext *ctx, const StringRef name, const Property &p, PropertyAttributes attrs)
{
    uint idx = name->asArrayIndex();
    if (idx != UINT_MAX)
        return __defineOwnProperty__(ctx, idx, p, attrs);

    name->makeIdentifier();

    Scope scope(ctx);
    Property *current;
    PropertyAttributes *cattrs;
    uint memberIndex;

    if (isArrayObject() && name->equals(ctx->engine->id_length)) {
        assert(ArrayObject::LengthPropertyIndex == internalClass->find(ctx->engine->id_length));
        Property *lp = propertyAt(ArrayObject::LengthPropertyIndex);
        cattrs = internalClass->propertyData.constData() + ArrayObject::LengthPropertyIndex;
        if (attrs.isEmpty() || p.isSubset(attrs, *lp, *cattrs))
            return true;
        if (!cattrs->isWritable() || attrs.type() == PropertyAttributes::Accessor || attrs.isConfigurable() || attrs.isEnumerable())
            goto reject;
        bool succeeded = true;
        if (attrs.type() == PropertyAttributes::Data) {
            bool ok;
            uint l = p.value.asArrayLength(&ok);
            if (!ok) {
                ScopedValue v(scope, p.value);
                ctx->throwRangeError(v);
                return false;
            }
            succeeded = setArrayLength(l);
        }
        if (attrs.hasWritable() && !attrs.isWritable())
            cattrs->setWritable(false);
        if (!succeeded)
            goto reject;
        if (attrs.isAccessor())
            hasAccessorProperty = 1;
        return true;
    }

    // Clause 1
    memberIndex = internalClass->find(name.getPointer());
    current = (memberIndex < UINT_MAX) ? propertyAt(memberIndex) : 0;
    cattrs = internalClass->propertyData.constData() + memberIndex;

    if (!current) {
        // clause 3
        if (!extensible)
            goto reject;
        // clause 4
        Property pd;
        pd.copy(p, attrs);
        pd.fullyPopulated(&attrs);
        insertMember(name, pd, attrs);
        return true;
    }

    return __defineOwnProperty__(ctx, memberIndex, name, p, attrs);
reject:
  if (ctx->strictMode)
      ctx->throwTypeError();
  return false;
}