Remove the descriptor stream abstractions....

src/objects-inl.h

 // Copyright 2006-2008 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 1332 matching lines @@
   return GetContentArray()->get(ToValueIndex(descriptor_number));
 }
 
 
 Smi* DescriptorArray::GetDetails(int descriptor_number) {
   ASSERT(descriptor_number < number_of_descriptors());
   return Smi::cast(GetContentArray()->get(ToDetailsIndex(descriptor_number)));
 }
 
 
+PropertyType DescriptorArray::GetType(int descriptor_number) {
+  ASSERT(descriptor_number < number_of_descriptors());
+  return PropertyDetails(GetDetails(descriptor_number)).type();
+}
+
+
+int DescriptorArray::GetFieldIndex(int descriptor_number) {
+  return Descriptor::IndexFromValue(GetValue(descriptor_number));
+}
+
+
+JSFunction* DescriptorArray::GetConstantFunction(int descriptor_number) {
+  return JSFunction::cast(GetValue(descriptor_number));
+}
+
+
+Object* DescriptorArray::GetCallbacksObject(int descriptor_number) {
+  ASSERT(GetType(descriptor_number) == CALLBACKS);
+  return GetValue(descriptor_number);
+}
+
+
+AccessorDescriptor* DescriptorArray::GetCallbacks(int descriptor_number) {
+  ASSERT(GetType(descriptor_number) == CALLBACKS);
+  Proxy* p = Proxy::cast(GetCallbacksObject(descriptor_number));
+  return reinterpret_cast<AccessorDescriptor*>(p->proxy());
+}
+
+
+bool DescriptorArray::IsProperty(int descriptor_number) {
+  return GetType(descriptor_number) < FIRST_PHANTOM_PROPERTY_TYPE;
+}
+
+
+bool DescriptorArray::IsTransition(int descriptor_number) {
+  PropertyType t = GetType(descriptor_number);
+  return t == MAP_TRANSITION || t == CONSTANT_TRANSITION;
+}
+
+
+bool DescriptorArray::IsNullDescriptor(int descriptor_number) {
+  return GetType(descriptor_number) == NULL_DESCRIPTOR;
+}
+
+
+bool DescriptorArray::IsDontEnum(int descriptor_number) {
+  return PropertyDetails(GetDetails(descriptor_number)).IsDontEnum();
+}
+
+
 void DescriptorArray::Get(int descriptor_number, Descriptor* desc) {
   desc->Init(GetKey(descriptor_number),
              GetValue(descriptor_number),
              GetDetails(descriptor_number));
 }
 
 
 void DescriptorArray::Set(int descriptor_number, Descriptor* desc) {
   // Range check.
   ASSERT(descriptor_number < number_of_descriptors());
 
   // Make sure non of the elements in desc are in new space.
   ASSERT(!Heap::InNewSpace(desc->GetKey()));
   ASSERT(!Heap::InNewSpace(desc->GetValue()));
 
   fast_set(this, ToKeyIndex(descriptor_number), desc->GetKey());
   FixedArray* content_array = GetContentArray();
   fast_set(content_array, ToValueIndex(descriptor_number), desc->GetValue());
   fast_set(content_array, ToDetailsIndex(descriptor_number),
            desc->GetDetails().AsSmi());
 }
 
 
+void DescriptorArray::SetFrom(int index, DescriptorArray* src, int src_index) {
+  Descriptor desc;
+  src->Get(src_index, &desc);
+  Set(index, &desc);
+}
+
+
 void DescriptorArray::Swap(int first, int second) {
   fast_swap(this, ToKeyIndex(first), ToKeyIndex(second));
   FixedArray* content_array = GetContentArray();
   fast_swap(content_array, ToValueIndex(first), ToValueIndex(second));
   fast_swap(content_array, ToDetailsIndex(first),  ToDetailsIndex(second));
 }
 
 
 bool NumberDictionary::requires_slow_elements() {
   Object* max_index_object = get(kMaxNumberKeyIndex);
@@ skipping 1321 matching lines @@
 #undef WRITE_INT_FIELD
 #undef READ_SHORT_FIELD
 #undef WRITE_SHORT_FIELD
 #undef READ_BYTE_FIELD
 #undef WRITE_BYTE_FIELD
 
 
 } }  // namespace v8::internal
 
 #endif  // V8_OBJECTS_INL_H_