--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/JavaScriptCore/runtime/ScopeChain.cpp	Fri Sep 17 09:02:29 2010 +0300
@@ -0,0 +1,68 @@
+/*
+ *  Copyright (C) 2003, 2006, 2008 Apple Inc.
+ *
+ *  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.
+ *
+ */
+
+#include "config.h"
+#include "ScopeChain.h"
+
+#include "JSActivation.h"
+#include "JSGlobalObject.h"
+#include "JSObject.h"
+#include "PropertyNameArray.h"
+#include <stdio.h>
+
+namespace JSC {
+
+#ifndef NDEBUG
+
+void ScopeChainNode::print() const
+{
+    ScopeChainIterator scopeEnd = end();
+    for (ScopeChainIterator scopeIter = begin(); scopeIter != scopeEnd; ++scopeIter) {
+        JSObject* o = *scopeIter;
+        PropertyNameArray propertyNames(globalObject->globalExec());
+        o->getPropertyNames(globalObject->globalExec(), propertyNames);
+        PropertyNameArray::const_iterator propEnd = propertyNames.end();
+
+        fprintf(stderr, "----- [scope %p] -----\n", o);
+        for (PropertyNameArray::const_iterator propIter = propertyNames.begin(); propIter != propEnd; propIter++) {
+            Identifier name = *propIter;
+            fprintf(stderr, "%s, ", name.ascii());
+        }
+        fprintf(stderr, "\n");
+    }
+}
+
+#endif
+
+int ScopeChain::localDepth() const
+{
+    int scopeDepth = 0;
+    ScopeChainIterator iter = this->begin();
+    ScopeChainIterator end = this->end();
+    while (!(*iter)->inherits(&JSActivation::info)) {
+        ++iter;
+        if (iter == end)
+            break;
+        ++scopeDepth;
+    }
+    return scopeDepth;
+}
+
+} // namespace JSC