JavaScriptCore-1218.tar.gz

[apple/javascriptcore.git] / bytecode / ResolveGlobalStatus.cpp

diff --git a/bytecode/ResolveGlobalStatus.cpp b/bytecode/ResolveGlobalStatus.cpp
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+/*
+ * Copyright (C) 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 "ResolveGlobalStatus.h"
+
+#include "CodeBlock.h"
+#include "JSCJSValue.h"
+#include "Operations.h"
+#include "Structure.h"
+
+namespace JSC {
+
+static ResolveGlobalStatus computeForStructure(CodeBlock* codeBlock, Structure* structure, Identifier& identifier)
+{
+    unsigned attributesIgnored;
+    JSCell* specificValue;
+    PropertyOffset offset = structure->get(*codeBlock->vm(), identifier, attributesIgnored, specificValue);
+    if (structure->isDictionary())
+        specificValue = 0;
+    if (!isValidOffset(offset))
+        return ResolveGlobalStatus();
+    
+    return ResolveGlobalStatus(ResolveGlobalStatus::Simple, structure, offset, specificValue);
+}
+
+ResolveGlobalStatus ResolveGlobalStatus::computeFor(CodeBlock* codeBlock, int, ResolveOperation* operation, Identifier& identifier)
+{
+    ASSERT(operation->m_operation == ResolveOperation::GetAndReturnGlobalProperty);
+    if (!operation->m_structure)
+        return ResolveGlobalStatus();
+    
+    return computeForStructure(codeBlock, operation->m_structure.get(), identifier);
+}
+
+} // namespace JSC
+