JavaScriptCore-1218.tar.gz

[apple/javascriptcore.git] / runtime / JSNameScope.cpp

diff --git a/runtime/JSNameScope.cpp b/runtime/JSNameScope.cpp
new file mode 100644 (file)
index 0000000..53468d6
--- /dev/null
+++ b/runtime/JSNameScope.cpp
@@ -0,0 +1,81 @@
+/*
+ * Copyright (C) 2008, 2009, 2012 Apple Inc. All Rights Reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY
+ * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL APPLE INC. OR
+ * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
+ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
+ * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
+ * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
+ * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 
+ */
+
+#include "config.h"
+#include "JSNameScope.h"
+
+#include "Error.h"
+#include "Operations.h"
+
+namespace JSC {
+
+const ClassInfo JSNameScope::s_info = { "NameScope", &Base::s_info, 0, 0, CREATE_METHOD_TABLE(JSNameScope) };
+
+void JSNameScope::visitChildren(JSCell* cell, SlotVisitor& visitor)
+{
+    JSNameScope* thisObject = jsCast<JSNameScope*>(cell);
+    ASSERT_GC_OBJECT_INHERITS(thisObject, &s_info);
+    COMPILE_ASSERT(StructureFlags & OverridesVisitChildren, OverridesVisitChildrenWithoutSettingFlag);
+    ASSERT(thisObject->structure()->typeInfo().overridesVisitChildren());
+
+    Base::visitChildren(thisObject, visitor);
+    visitor.append(&thisObject->m_registerStore);
+}
+
+JSObject* JSNameScope::toThisObject(JSCell*, ExecState* exec)
+{
+    return exec->globalThisValue();
+}
+
+void JSNameScope::put(JSCell* cell, ExecState* exec, PropertyName propertyName, JSValue value, PutPropertySlot& slot)
+{
+    JSNameScope* thisObject = jsCast<JSNameScope*>(cell);
+    if (slot.isStrictMode()) {
+        // Double lookup in strict mode, but this only occurs when
+        // a) indirectly writing to an exception slot
+        // b) writing to a function expression name
+        // (a) is unlikely, and (b) is an error.
+        // Also with a single entry the symbol table lookup should simply be
+        // a pointer compare.
+        PropertySlot slot;
+        bool isWritable = true;
+        symbolTableGet(thisObject, propertyName, slot, isWritable);
+        if (!isWritable) {
+            throwError(exec, createTypeError(exec, StrictModeReadonlyPropertyWriteError));
+            return;
+        }
+    }
+    if (symbolTablePut(thisObject, exec, propertyName, value, slot.isStrictMode()))
+        return;
+    
+    RELEASE_ASSERT_NOT_REACHED();
+}
+
+bool JSNameScope::getOwnPropertySlot(JSCell* cell, ExecState*, PropertyName propertyName, PropertySlot& slot)
+{
+    return symbolTableGet(jsCast<JSNameScope*>(cell), propertyName, slot);
+}
+
+} // namespace JSC