Add function for finding what a InputStream or OutputStream is attached to

runtime/bin/socket.cc

-// Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
+// 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/io_buffer.h"
 #include "bin/socket.h"
 #include "bin/dartutils.h"
 #include "bin/thread.h"
 #include "bin/utils.h"
 
 #include "platform/globals.h"
@@ skipping 248 matching lines @@
   Dart_Handle socket_obj = Dart_GetNativeArgument(args, 0);
   intptr_t socket = 0;
   Socket::GetSocketIdNativeField(socket_obj, &socket);
   OSError os_error;
   Socket::GetError(socket, &os_error);
   Dart_SetReturnValue(args, DartUtils::NewDartOSError(&os_error));
   Dart_ExitScope();
 }
 
 
+void FUNCTION_NAME(Socket_GetType)(Dart_NativeArguments args) {
+  Dart_EnterScope();
+  Dart_Handle socket_obj = Dart_GetNativeArgument(args, 0);
+  intptr_t socket = 0;
+  Socket::GetSocketIdNativeField(socket_obj, &socket);
+  OSError os_error;
+  intptr_t type = Socket::GetType(socket);
+  if (type >= 0) {
+    Dart_SetReturnValue(args, Dart_NewInteger(type));
+  } else {
+    Dart_SetReturnValue(args, DartUtils::NewDartOSError());
+  }
+  Dart_ExitScope();
+}
+
+
 void FUNCTION_NAME(Socket_GetStdioHandle)(Dart_NativeArguments args) {
   Dart_EnterScope();
   Dart_Handle socket_obj = Dart_GetNativeArgument(args, 0);
   intptr_t num =
       DartUtils::GetIntegerValue(Dart_GetNativeArgument(args, 1));
   ASSERT(num == 0 || num == 1 || num == 2);
   intptr_t socket = Socket::GetStdioHandle(num);
   Socket::SetSocketIdNativeField(socket_obj, socket);
   Dart_SetReturnValue(args, Dart_NewBoolean(socket >= 0));
   Dart_ExitScope();
@@ skipping 135 matching lines @@
 
 
 Dart_Handle Socket::SetSocketIdNativeField(Dart_Handle socket, intptr_t id) {
   return Dart_SetNativeInstanceField(socket, kSocketIdNativeField, id);
 }
 
 
 Dart_Handle Socket::GetSocketIdNativeField(Dart_Handle socket, intptr_t* id) {
   return Dart_GetNativeInstanceField(socket, kSocketIdNativeField, id);
 }