Add support for more typed data types on native ports

runtime/bin/file.cc

 // Copyright (c) 2013, 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/file.h"
 
 #include "bin/builtin.h"
 #include "bin/dartutils.h"
 #include "bin/io_buffer.h"
 #include "bin/thread.h"
@@ skipping 947 matching lines @@
         return CObject::NewOSError();
       }
     } else {
       return CObject::FileClosedError();
     }
   }
   return CObject::IllegalArgumentError();
 }
 
 
+static int SizeInBytes(Dart_CObject::ByteArrayType type) {
+  switch (type) {
+    case Dart_CObject::kInt8Array:
+    case Dart_CObject::kUint8Array:
+      return 1;
+    case Dart_CObject::kInt16Array:
+    case Dart_CObject::kUint16Array:
+      return 2;
+    default:
+      break;
+  }
+  UNREACHABLE();
+  return -1;
+}
+
+
 static CObject* FileWriteListRequest(const CObjectArray& request) {
   if (request.Length() == 5 &&
       request[1]->IsIntptr() &&
-      (request[2]->IsUint8Array() || request[2]->IsArray()) &&
+      (request[2]->IsByteArray() || request[2]->IsArray()) &&
       request[3]->IsInt32OrInt64() &&
       request[4]->IsInt32OrInt64()) {
     File* file = CObjectToFilePointer(request[1]);
     ASSERT(file != NULL);
     if (!file->IsClosed()) {
       int64_t offset = CObjectInt32OrInt64ToInt64(request[3]);
       int64_t length = CObjectInt32OrInt64ToInt64(request[4]);
       uint8_t* buffer_start;
-      if (request[2]->IsUint8Array()) {
-        CObjectUint8Array byte_array(request[2]);
+      if (request[2]->IsByteArray()) {
+        CObjectByteArray byte_array(request[2]);
+        offset = offset * SizeInBytes(byte_array.Type());
+        length = length * SizeInBytes(byte_array.Type());
         buffer_start = byte_array.Buffer() + offset;
       } else {
         CObjectArray array(request[2]);
         buffer_start = new uint8_t[length];
         for (int i = 0; i < length; i++) {
           if (array[i + offset]->IsInt32OrInt64()) {
             int64_t value = CObjectInt32OrInt64ToInt64(array[i + offset]);
             buffer_start[i] = static_cast<uint8_t>(value & 0xFF);
           } else {
             // Unsupported type.
             delete[] buffer_start;
             return CObject::IllegalArgumentError();
           }
         }
         offset = 0;
       }
       int64_t bytes_written =
           file->Write(reinterpret_cast<void*>(buffer_start), length);
-      if (!request[2]->IsUint8Array()) {
+      if (!request[2]->IsByteArray()) {
         delete[] buffer_start;
       }
       if (bytes_written >= 0) {
         return new CObjectInt64(CObject::NewInt64(bytes_written));
       } else {
         return CObject::NewOSError();
       }
     } else {
       return CObject::FileClosedError();
     }
@@ skipping 123 matching lines @@
   Dart_EnterScope();
   Dart_SetReturnValue(args, Dart_Null());
   Dart_Port service_port = File::GetServicePort();
   if (service_port != ILLEGAL_PORT) {
     // Return a send port for the service port.
     Dart_Handle send_port = Dart_NewSendPort(service_port);
     Dart_SetReturnValue(args, send_port);
   }
   Dart_ExitScope();
 }