Add getter for lineMode and echoMode for Stdin.

runtime/bin/stdin_win.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 "platform/globals.h"
 #if defined(TARGET_OS_WINDOWS)
 
 #include "bin/stdin.h"
 
 
 namespace dart {
 namespace bin {
 
 int Stdin::ReadByte() {
   HANDLE h = GetStdHandle(STD_INPUT_HANDLE);
   uint8_t buffer[1];
   DWORD read = 0;
   int c = -1;
   if (ReadFile(h, buffer, 1, &read, NULL) && read == 1) {
     c = buffer[0];
   }
   return c;
 }
 
 
+bool Stdin::GetEchoMode() {
+  HANDLE h = GetStdHandle(STD_INPUT_HANDLE);
+  DWORD mode;
+  if (!GetConsoleMode(h, &mode)) return false;
+  return (mode & ENABLE_ECHO_INPUT) != 0;
+}
+
+
 void Stdin::SetEchoMode(bool enabled) {
   HANDLE h = GetStdHandle(STD_INPUT_HANDLE);
   DWORD mode;
   if (!GetConsoleMode(h, &mode)) return;
   if (enabled) {
     mode |= ENABLE_ECHO_INPUT;
   } else {
     mode &= ~ENABLE_ECHO_INPUT;
   }
   SetConsoleMode(h, mode);
 }
 
 
+bool Stdin::GetLineMode() {
+  HANDLE h = GetStdHandle(STD_INPUT_HANDLE);
+  DWORD mode;
+  if (!GetConsoleMode(h, &mode)) return false;
+  return (mode & ENABLE_LINE_INPUT) != 0;
+}
+
+
 void Stdin::SetLineMode(bool enabled) {
   HANDLE h = GetStdHandle(STD_INPUT_HANDLE);
   DWORD mode;
   if (!GetConsoleMode(h, &mode)) return;
   if (enabled) {
     mode |= ENABLE_LINE_INPUT;
   } else {
     mode &= ~ENABLE_LINE_INPUT;
   }
   SetConsoleMode(h, mode);
 }
 
 }  // namespace bin
 }  // namespace dart
 
 #endif  // defined(TARGET_OS_WINDOWS)