New APIs for external byte arrays

runtime/vm/raw_object.h

Index: runtime/vm/raw_object.h
diff --git a/runtime/vm/raw_object.h b/runtime/vm/raw_object.h
index 1fc850f69e7dcc3bcdd88a0b728e6fe4944b5a71..0a35859eaeda8ac4284720aa5a923defe87f4cea 100644
--- a/runtime/vm/raw_object.h
+++ b/runtime/vm/raw_object.h
@@ -340,6 +340,7 @@ class RawObject {
   static bool IsExternalStringClassId(intptr_t index);
   static bool IsBuiltinListClassId(intptr_t index);
   static bool IsByteArrayClassId(intptr_t index);
+  static bool IsExternalByteArrayClassId(intptr_t index);
 
  protected:
   uword tags_;  // Various object tags (bits).
@@ -1611,6 +1612,21 @@ inline bool RawObject::IsByteArrayClassId(intptr_t index) {
   return (index >= kByteArrayCid && index <= kExternalFloat64ArrayCid);
 }
 
+inline bool RawObject::IsExternalByteArrayClassId(intptr_t index) {
+  // Make sure this function is updated when new ByteArray types are added.
+  ASSERT(kExternalUint8ArrayCid == kExternalInt8ArrayCid + 1 &&
+         kExternalInt16ArrayCid == kExternalInt8ArrayCid + 2 &&
+         kExternalUint16ArrayCid == kExternalInt8ArrayCid + 3 &&
+         kExternalInt32ArrayCid == kExternalInt8ArrayCid + 4 &&
+         kExternalUint32ArrayCid == kExternalInt8ArrayCid + 5 &&
+         kExternalInt64ArrayCid == kExternalInt8ArrayCid + 6 &&
+         kExternalUint64ArrayCid == kExternalInt8ArrayCid + 7 &&
+         kExternalFloat32ArrayCid == kExternalInt8ArrayCid + 8 &&
+         kExternalFloat64ArrayCid == kExternalInt8ArrayCid + 9 &&
+         kStacktraceCid == kExternalInt8ArrayCid + 10);
+  return (index >= kExternalInt8ArrayCid && index <= kExternalFloat64ArrayCid);
+}
+
 }  // namespace dart
 
 #endif  // VM_RAW_OBJECT_H_