Support posting of external data into dart as external uint8 arrays through the Dart API.

runtime/bin/dartutils.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 "bin/dartutils.h"
 
 #include "bin/file.h"
 #include "include/dart_api.h"
 #include "platform/assert.h"
 #include "platform/globals.h"
@@ skipping 415 matching lines @@
 
 
 Dart_CObject* CObject::NewUint8Array(int length) {
   Dart_CObject* cobject = New(Dart_CObject::kUint8Array, length);
   cobject->value.as_byte_array.length = length;
   cobject->value.as_byte_array.values = reinterpret_cast<uint8_t*>(cobject + 1);
   return cobject;
 }
 
 
+Dart_CObject* CObject::NewExternalUint8Array(int length,
+                                             uint8_t* data,
+                                             void* peer,
+                                             Dart_PeerFinalizer callback) {
+  Dart_CObject* cobject = New(Dart_CObject::kExternalUint8Array);
+  cobject->value.as_external_byte_array.length = length;
+  cobject->value.as_external_byte_array.data = data;
+  cobject->value.as_external_byte_array.peer = peer;
+  cobject->value.as_external_byte_array.callback = callback;
+  return cobject;
+}
+
+
 static int kIllegalArgumentError = 1;
 static int kOSError = 2;
 static int kFileClosedError = 3;
 
 
 CObject* CObject::IllegalArgumentError() {
   CObjectArray* result = new CObjectArray(CObject::NewArray(1));
   result->SetAt(0, new CObjectInt32(CObject::NewInt32(kIllegalArgumentError)));
   return result;
 }
@@ skipping 13 matching lines @@
 
 CObject* CObject::NewOSError(OSError* os_error) {
   CObject* error_message =
       new CObjectString(CObject::NewString(os_error->message()));
   CObjectArray* result = new CObjectArray(CObject::NewArray(3));
   result->SetAt(0, new CObjectInt32(CObject::NewInt32(kOSError)));
   result->SetAt(1, new CObjectInt32(CObject::NewInt32(os_error->code())));
   result->SetAt(2, error_message);
   return result;
 }