- Use dart:typedata types in the Dart API calls.

runtime/vm/raw_object_snapshot.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/bigint_operations.h"
 #include "vm/object.h"
 #include "vm/object_store.h"
 #include "vm/snapshot.h"
 #include "vm/symbols.h"
 #include "vm/visitor.h"
@@ skipping 2450 matching lines @@
   }
   return result.raw();
 }
 #undef TYPED_DATA_READ
 
 
 RawExternalTypedData* ExternalTypedData::ReadFrom(SnapshotReader* reader,
                                                   intptr_t object_id,
                                                   intptr_t tags,
                                                   Snapshot::Kind kind) {
-  UNIMPLEMENTED();
-  return ExternalTypedData::null();
+  ASSERT(kind != Snapshot::kFull);
+  intptr_t cid = RawObject::ClassIdTag::decode(tags);
+  intptr_t length = reader->ReadSmiValue();
+  uint8_t* data = reinterpret_cast<uint8_t*>(reader->ReadIntptrValue());
+  const ExternalTypedData& obj = ExternalTypedData::Handle(
+      ExternalTypedData::New(cid, data, length));
+  void* peer = reinterpret_cast<void*>(reader->ReadIntptrValue());
+  Dart_WeakPersistentHandleFinalizer callback =
+      reinterpret_cast<Dart_WeakPersistentHandleFinalizer>(
+          reader->ReadIntptrValue());
+  obj.AddFinalizer(peer, callback);
+  return obj.raw();
 }
 
 
 #define TYPED_DATA_WRITE(type)                                                 \
   {                                                                            \
     type* data = reinterpret_cast<type*>(ptr()->data_);                        \
     for (intptr_t i = 0; i < len; i++) {                                       \
       writer->Write(data[i]);                                                  \
     }                                                                          \
   }                                                                            \
@@ skipping 283 matching lines @@
   // Write out the class and tags information.
   writer->WriteIndexedObject(kWeakPropertyCid);
   writer->WriteIntptrValue(writer->GetObjectTags(this));
 
   // Write out all the other fields.
   writer->Write<RawObject*>(ptr()->key_);
   writer->Write<RawObject*>(ptr()->value_);
 }
 
 }  // namespace dart