Provide access to stdin, stdout and stderr

runtime/bin/builtin.dart

 // Copyright (c) 2011, 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.
 
 #library("builtin");
 
 void print(arg) {
   _Logger._printString(arg.toString());
 }
 
 void exit(int status) {
   if (status is !int) {
     throw new IllegalArgumentException("int status expected");
   }
   _exit(status);
 }
 
+Socket _stdin ;

[Mads Ager (google), 2011/11/11 11:37:36]

Remove space before ';'.

+OutputStream get stdin() {
+  if (_stdin == null) {
+    _stdin = new _Socket._internalReadOnly();
+    _stdin._id = 0;
+  }
+  return _stdin.inputStream;
+}
+
+Socket _stdout;
+OutputStream get stdout() {
+  if (_stdout == null) {
+    _stdout = new _Socket._internalWriteOnly();
+    _stdout._id = 1;
+  }
+  return _stdout.outputStream;
+}
+
+Socket _stderr;
+OutputStream get stderr() {
+  if (_stderr == null) {
+    _stderr = new _Socket._internalWriteOnly();
+    _stderr._id = 2;
+  }
+  return _stderr.outputStream;
+}
+
 _exit(int status) native "Exit";
 
 class _Logger {
   static void _printString(String s) native "Logger_PrintString";
 }