Error reporting on File in dart:io

runtime/bin/io.dart

 // 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.
 
 // The dart:io library is the concatenation of all the files in
 // io_sources.gypi. This file needs to be the first file in that
 // concatenation.
 
 #library("io");
 #import("dart:coreimpl");
 #import("dart:isolate");
 #import("dart:nativewrappers");
+
+/** Class for holding information on an error that was returned from the

[Mads Ager (google), 2012/03/08 15:04:27]

/**
 * Class

[Søren Gjesse, 2012/03/08 22:50:53]

Done.

+  * operating system.
+  */
+class OSError {

[Mads Ager (google), 2012/03/08 15:04:27]

We should move this to a separate file instead of having it in io.dart. We
should keep io.dart as just a file containing the imports.

[Søren Gjesse, 2012/03/08 22:50:53]

Moved to common.dart.

+  static int noErrorCode = -1;
+
+  OSError([String this.message, int this.errorCode = -1]);
+
+  String toString() {
+    StringBuffer sb = new StringBuffer();
+    sb.add("OS Error");
+    if (message != null && message.length > 0) {
+      sb.add(": ");
+      sb.add(message);
+      if (errorCode != noErrorCode) {
+        sb.add(", errno = ");
+        sb.add(errorCode.toString());
+      }
+    } else if (errorCode != noErrorCode) {
+      sb.add(": errno = ");
+      sb.add(errorCode.toString());
+    }
+    return sb.toString();
+  }
+
+  /** Error message supplied by the operating system. null if no message is

[Mads Ager (google), 2012/03/08 15:04:27]

Ditto.

[Søren Gjesse, 2012/03/08 22:50:53]

Done.

+    * associated with the error.
+    */
+  String message;
+
+  /** Error code supplied by the operating system. Will have the value

[Mads Ager (google), 2012/03/08 15:04:27]

Ditto.

[Søren Gjesse, 2012/03/08 22:50:53]

Done.

+    * [noErrorCode] if there is no error code associated with the error.
+    */
+  int errorCode;
+}