Last cross-platform cleanup in preparation of improved ARM code for indexed

runtime/vm/object.cc

 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 #include "vm/object.h"
 
 #include "include/dart_api.h"
 #include "platform/assert.h"
 #include "vm/assembler.h"
 #include "vm/cpu.h"
@@ skipping 13036 matching lines @@
 
 bool Instance::IsValidFieldOffset(intptr_t offset) const {
   Isolate* isolate = Isolate::Current();
   REUSABLE_CLASS_HANDLESCOPE(isolate);
   Class& cls = isolate->ClassHandle();
   cls = clazz();
   return (offset >= 0 && offset <= (cls.instance_size() - kWordSize));
 }
 
 
+intptr_t Instance::ElementSizeFor(intptr_t cid) {
+  if (RawObject::IsExternalTypedDataClassId(cid)) {
+    return ExternalTypedData::ElementSizeInBytes(cid);
+  } else if (RawObject::IsTypedDataClassId(cid)) {
+    return TypedData::ElementSizeInBytes(cid);
+  }
+  switch (cid) {
+    case kArrayCid:
+    case kImmutableArrayCid:
+      return Array::kBytesPerElement;
+    case kOneByteStringCid:
+      return OneByteString::kBytesPerElement;
+    case kTwoByteStringCid:
+      return TwoByteString::kBytesPerElement;
+    default:
+      UNIMPLEMENTED();
+      return 0;
+  }
+}
+
+
+intptr_t Instance::DataOffsetFor(intptr_t cid) {
+  if (RawObject::IsExternalTypedDataClassId(cid)) {
+    // Elements start at offset 0 of the external data.
+    return 0;
+  }
+  if (RawObject::IsTypedDataClassId(cid)) {
+    return TypedData::data_offset();
+  }
+  switch (cid) {
+    case kArrayCid:
+    case kImmutableArrayCid:
+      return Array::data_offset();
+    case kOneByteStringCid:
+      return OneByteString::data_offset();
+    case kTwoByteStringCid:
+      return TwoByteString::data_offset();
+    default:
+      UNIMPLEMENTED();
+      return Array::data_offset();
+  }
+}
+
+
 const char* Instance::ToCString() const {
   if (IsNull()) {
     return "null";
   } else if (raw() == Object::sentinel().raw()) {
     return "sentinel";
   } else if (raw() == Object::transition_sentinel().raw()) {
     return "transition_sentinel";
   } else if (raw() == Object::unknown_constant().raw()) {
     return "unknown_constant";
   } else if (raw() == Object::non_constant().raw()) {
@@ skipping 5798 matching lines @@
   return tag_label.ToCString();
 }
 
 
 void UserTag::PrintJSONImpl(JSONStream* stream, bool ref) const {
   Instance::PrintJSONImpl(stream, ref);
 }
 
 
 }  // namespace dart