[dart:io] Reland: Adds Platform.localeName

runtime/bin/platform_win.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 "platform/globals.h"
 #if defined(HOST_OS_WINDOWS)
 
 #include "bin/platform.h"
 
 #include <crtdbg.h>
@@ skipping 180 matching lines @@
 const char* Platform::LibraryPrefix() {
   return "";
 }
 
 
 const char* Platform::LibraryExtension() {
   return "dll";
 }
 
 
+const char* Platform::LocaleName() {
+  wchar_t locale_name[LOCALE_NAME_MAX_LENGTH];
+  int result = GetUserDefaultLocaleName(locale_name, LOCALE_NAME_MAX_LENGTH);
+  if (result == 0) {
+    return NULL;
+  }
+  return StringUtilsWin::WideToUtf8(locale_name);
+}
+
+
 bool Platform::LocalHostname(char* buffer, intptr_t buffer_length) {
 #if defined(DART_IO_DISABLED) || defined(PLATFORM_DISABLE_SOCKET)
   return false;
 #else
   if (!Socket::Initialize()) {
     return false;
   }
   return gethostname(buffer, buffer_length) == 0;
 #endif
 }
@@ skipping 60 matching lines @@
   PlatformWin::RestoreConsole();
   // On Windows we use ExitProcess so that threads can't clobber the exit_code.
   // See: https://code.google.com/p/nativeclient/issues/detail?id=2870
   ::ExitProcess(exit_code);
 }
 
 }  // namespace bin
 }  // namespace dart
 
 #endif  // defined(HOST_OS_WINDOWS)