1 files changed, 17 insertions, 4 deletions
diff --git a/Source/JavaScriptCore/runtime/IndexingHeader.h b/Source/JavaScriptCore/runtime/IndexingHeader.h
index 145b61876..a88643239 100644
--- a/Source/JavaScriptCore/runtime/IndexingHeader.h
+++ b/Source/JavaScriptCore/runtime/IndexingHeader.h
@@ -1,5 +1,5 @@
 /*
- * Copyright (C) 2012 Apple Inc. All rights reserved.
+ * Copyright (C) 2012, 2014 Apple Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
@@ -27,10 +27,10 @@
 #define IndexingHeader_h
 
 #include "PropertyStorage.h"
-#include <wtf/Platform.h>
 
 namespace JSC {
 
+class ArrayBuffer;
 class Butterfly;
 class LLIntOffsetsExtractor;
 class Structure;
@@ -44,6 +44,7 @@ public:
     
     static ptrdiff_t offsetOfIndexingHeader() { return -static_cast<ptrdiff_t>(sizeof(IndexingHeader)); }
     
+    static ptrdiff_t offsetOfArrayBuffer() { return OBJECT_OFFSETOF(IndexingHeader, u.typedArray.buffer); }
     static ptrdiff_t offsetOfPublicLength() { return OBJECT_OFFSETOF(IndexingHeader, u.lengths.publicLength); }
     static ptrdiff_t offsetOfVectorLength() { return OBJECT_OFFSETOF(IndexingHeader, u.lengths.vectorLength); }
     
@@ -61,9 +62,12 @@ public:
         u.lengths.vectorLength = length;
     }
     
-    uint32_t publicLength() { return u.lengths.publicLength; }
+    uint32_t publicLength() const { return u.lengths.publicLength; }
     void setPublicLength(uint32_t auxWord) { u.lengths.publicLength = auxWord; }
     
+    ArrayBuffer* arrayBuffer() { return u.typedArray.buffer; }
+    void setArrayBuffer(ArrayBuffer* buffer) { u.typedArray.buffer = buffer; }
+    
     static IndexingHeader* from(Butterfly* butterfly)
     {
         return reinterpret_cast<IndexingHeader*>(butterfly) - 1;
@@ -76,7 +80,12 @@ public:
     
     static IndexingHeader* from(ArrayStorage* arrayStorage)
     {
-        return reinterpret_cast<IndexingHeader*>(arrayStorage) - 1;
+        return const_cast<IndexingHeader*>(from(const_cast<const ArrayStorage*>(arrayStorage)));
+    }
+    
+    static const IndexingHeader* from(const ArrayStorage* arrayStorage)
+    {
+        return reinterpret_cast<const IndexingHeader*>(arrayStorage) - 1;
     }
     
     static IndexingHeader* fromEndOf(PropertyStorage propertyStorage)
@@ -117,6 +126,10 @@ private:
             uint32_t publicLength; // The meaning of this field depends on the array type, but for all JSArrays we rely on this being the publicly visible length (array.length).
             uint32_t vectorLength; // The length of the indexed property storage. The actual size of the storage depends on this, and the type.
         } lengths;
+        
+        struct {
+            ArrayBuffer* buffer;
+        } typedArray;
     } u;
 };