1 files changed, 73 insertions, 0 deletions
diff --git a/JavaScriptCore/runtime/StructureIDChain.cpp b/JavaScriptCore/runtime/StructureIDChain.cpp
new file mode 100644
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--- /dev/null
+++ b/JavaScriptCore/runtime/StructureIDChain.cpp
@@ -0,0 +1,73 @@
+/*
+ * Copyright (C) 2008 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 COMPUTER, 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 COMPUTER, 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 "StructureIDChain.h"
+
+#include "JSObject.h"
+#include "StructureID.h"
+#include <wtf/RefPtr.h>
+
+namespace JSC {
+
+StructureIDChain::StructureIDChain(StructureID* structureID)
+{
+    size_t size = 1;
+
+    StructureID* tmp = structureID;
+    while (!tmp->storedPrototype()->isNull()) {
+        ++size;
+        tmp = asCell(tmp->storedPrototype())->structureID();
+    }
+    
+    m_vector.set(new RefPtr<StructureID>[size + 1]);
+
+    size_t i;
+    for (i = 0; i < size - 1; ++i) {
+        m_vector[i] = structureID;
+        structureID = asObject(structureID->storedPrototype())->structureID();
+    }
+    m_vector[i] = structureID;
+    m_vector[i + 1] = 0;
+}
+
+bool structureIDChainsAreEqual(StructureIDChain* chainA, StructureIDChain* chainB)
+{
+    if (!chainA || !chainB)
+        return false;
+
+    RefPtr<StructureID>* a = chainA->head();
+    RefPtr<StructureID>* b = chainB->head();
+    while (1) {
+        if (*a != *b)
+            return false;
+        if (!*a)
+            return true;
+        a++;
+        b++;
+    }
+}
+
+} // namespace JSC