1/*
2 * Copyright (C) 2008, 2009, 2012 Apple Inc. All Rights Reserved.
3 *
4 * Redistribution and use in source and binary forms, with or without
5 * modification, are permitted provided that the following conditions
6 * are met:
7 * 1. Redistributions of source code must retain the above copyright
8 *    notice, this list of conditions and the following disclaimer.
9 * 2. Redistributions in binary form must reproduce the above copyright
10 *    notice, this list of conditions and the following disclaimer in the
11 *    documentation and/or other materials provided with the distribution.
12 *
13 * THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY
14 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
15 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
16 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL APPLE INC. OR
17 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
18 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
19 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
20 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
21 * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
22 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
23 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
24 */
25
26#include "config.h"
27#include "JSNameScope.h"
28
29#include "Error.h"
30#include "Operations.h"
31
32namespace JSC {
33
34const ClassInfo JSNameScope::s_info = { "NameScope", &Base::s_info, 0, 0, CREATE_METHOD_TABLE(JSNameScope) };
35
36void JSNameScope::visitChildren(JSCell* cell, SlotVisitor& visitor)
37{
38    JSNameScope* thisObject = jsCast<JSNameScope*>(cell);
39    ASSERT_GC_OBJECT_INHERITS(thisObject, &s_info);
40    COMPILE_ASSERT(StructureFlags & OverridesVisitChildren, OverridesVisitChildrenWithoutSettingFlag);
41    ASSERT(thisObject->structure()->typeInfo().overridesVisitChildren());
42
43    Base::visitChildren(thisObject, visitor);
44    visitor.append(&thisObject->m_registerStore);
45}
46
47JSObject* JSNameScope::toThisObject(JSCell*, ExecState* exec)
48{
49    return exec->globalThisValue();
50}
51
52void JSNameScope::put(JSCell* cell, ExecState* exec, PropertyName propertyName, JSValue value, PutPropertySlot& slot)
53{
54    JSNameScope* thisObject = jsCast<JSNameScope*>(cell);
55    if (slot.isStrictMode()) {
56        // Double lookup in strict mode, but this only occurs when
57        // a) indirectly writing to an exception slot
58        // b) writing to a function expression name
59        // (a) is unlikely, and (b) is an error.
60        // Also with a single entry the symbol table lookup should simply be
61        // a pointer compare.
62        PropertySlot slot;
63        bool isWritable = true;
64        symbolTableGet(thisObject, propertyName, slot, isWritable);
65        if (!isWritable) {
66            throwError(exec, createTypeError(exec, StrictModeReadonlyPropertyWriteError));
67            return;
68        }
69    }
70    if (symbolTablePut(thisObject, exec, propertyName, value, slot.isStrictMode()))
71        return;
72
73    RELEASE_ASSERT_NOT_REACHED();
74}
75
76bool JSNameScope::getOwnPropertySlot(JSCell* cell, ExecState*, PropertyName propertyName, PropertySlot& slot)
77{
78    return symbolTableGet(jsCast<JSNameScope*>(cell), propertyName, slot);
79}
80
81} // namespace JSC
82