Encapsulate element handling into a class keyed on ElementsKind

src/runtime.cc

 // Copyright 2011 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * 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
@@ skipping 9181 matching lines @@
                                          ArrayConcatVisitor* visitor) {
   Handle<ExternalArrayClass> array(
       ExternalArrayClass::cast(receiver->elements()));
   uint32_t len = static_cast<uint32_t>(array->length());
 
   ASSERT(visitor != NULL);
   if (elements_are_ints) {
     if (elements_are_guaranteed_smis) {
       for (uint32_t j = 0; j < len; j++) {
         HandleScope loop_scope;
-        Handle<Smi> e(Smi::FromInt(static_cast<int>(array->get(j))));
+        Handle<Smi> e(Smi::FromInt(static_cast<int>(array->get_scalar(j))));
         visitor->visit(j, e);
       }
     } else {
       for (uint32_t j = 0; j < len; j++) {
         HandleScope loop_scope;
-        int64_t val = static_cast<int64_t>(array->get(j));
+        int64_t val = static_cast<int64_t>(array->get_scalar(j));
         if (Smi::IsValid(static_cast<intptr_t>(val))) {
           Handle<Smi> e(Smi::FromInt(static_cast<int>(val)));
           visitor->visit(j, e);
         } else {
           Handle<Object> e =
               isolate->factory()->NewNumber(static_cast<ElementType>(val));
           visitor->visit(j, e);
         }
       }
     }
   } else {
     for (uint32_t j = 0; j < len; j++) {
       HandleScope loop_scope(isolate);
-      Handle<Object> e = isolate->factory()->NewNumber(array->get(j));
+      Handle<Object> e = isolate->factory()->NewNumber(array->get_scalar(j));
       visitor->visit(j, e);
     }
   }
 }
 
 
 // Used for sorting indices in a List<uint32_t>.
 static int compareUInt32(const uint32_t* ap, const uint32_t* bp) {
   uint32_t a = *ap;
   uint32_t b = *bp;
@@ skipping 165 matching lines @@
         do {
           j++;
         } while (j < n && indices[j] == index);
       }
       break;
     }
     case JSObject::EXTERNAL_PIXEL_ELEMENTS: {
       Handle<ExternalPixelArray> pixels(ExternalPixelArray::cast(
           receiver->elements()));
       for (uint32_t j = 0; j < length; j++) {
-        Handle<Smi> e(Smi::FromInt(pixels->get(j)));
+        Handle<Smi> e(Smi::FromInt(pixels->get_scalar(j)));
         visitor->visit(j, e);
       }
       break;
     }
     case JSObject::EXTERNAL_BYTE_ELEMENTS: {
       IterateExternalArrayElements<ExternalByteArray, int8_t>(
           isolate, receiver, true, true, visitor);
       break;
     }
     case JSObject::EXTERNAL_UNSIGNED_BYTE_ELEMENTS: {
@@ skipping 3347 matching lines @@
   } else {
     // Handle last resort GC and make sure to allow future allocations
     // to grow the heap without causing GCs (if possible).
     isolate->counters()->gc_last_resort_from_js()->Increment();
     isolate->heap()->CollectAllGarbage(false);
   }
 }
 
 
 } }  // namespace v8::internal