Update the streams interfaces

runtime/bin/input_stream.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.
 
 /**
  * Input is read from a given input stream. Such an input stream can
  * be an endpoint, e.g., a socket or a file, or another input stream.
  * Multiple input streams can be chained together to operate collaboratively
  * on a given input.
  */
 interface InputStream {
   /**
-   * Reads [len] bytes into [buffer] buffer starting at [offset] offset.
-   * [callback] callback is invoked on completion unless it is null.
+   * Reads data from the stream. Returns a system allocated buffer
+   * with up to [len] bytes. If no value is passed for [len] all
+   * available data will be returned. If no data is available null will
+   * be returned.
    */
-  bool read(List<int> buffer, int offset, int len, void callback());
+  List<int> read([int len]);
 
   /**
-   * Reads data from the stream into a buffer until a given [pattern] occurs and
-   * hands that buffer over as an input to the registered [callback].
-   * The callback is not invoked if a read error occurs.
+   * Reads up to [len] bytes into buffer [buffer] starting at offset
+   * [offset]. Returns the number of bytes actually read which might
+   * be zero. If [offset] is not specified 0 is used. If [len] is not
+   * specified the length of [buffer] is used.
    */
-  void readUntil(List<int> pattern, void callback(List<int> buffer));
+  int readInto(List<int> buffer, [int offset, int len]);
+
+  /**
+   * Returns the number of bytes available for immediate reading.
+   */
+  int available();
+
+  /**
+   * Returns whether the stream has been closed. There might still be
+   * more data to read.
+   */
+  bool closed();
+
+  /**
+   * Sets the data which handler gets called when data is available.
+   */
+  void set dataHandler(void callback());
+
+  /**
+   * The close handler gets called when the underlying communication
+   * channel is closed and no more data will become available. Not all
+   * types of communication channels will emit close events.
+   */
+  void set closeHandler(void callback());
+
+  /**
+   * The error handler gets called when the underlying communication
+   * channel gets into some kind of error situation.
+   */
+  void set errorHandler(void callback());
 }
+
+
+interface StringInputStream factory _StringInputStream {
+  /**
+   * Decodes a binary input stream into characters using the specified
+   * encoding.
+   */
+  StringInputStream(InputStream input, [String encoding]);
+
+  /**
+   * Reads as many characters as is available from the stream. If no data is
+   * available null will be returned.
+   */
+  String read();
+
+  /**
+   * Reads the next line from the stream. The line ending characters
+   * will not be part og the returned string. If a full line is not
+   * available null will be returned.
+   */
+  String readLine();
+
+  /**
+   * Returns whether the stream has been closed. There might still be
+   * more data to read.
+   */
+  bool get closed();
+
+  /**
+   * Returns the encoding used to decode the binary data into characters.
+   */
+  String get encoding();
+
+  /**
+   * The data handler gets called when data is available.
+   */
+  void set dataHandler(void callback());
+
+  /**
+   * The close handler gets called when the underlying communication
+   * channel is closed and no more data will become available. Not all
+   * types of communication channels will emit close events.
+   */
+  void set closeHandler(void callback());
+
+  /**
+   * The error handler gets called when the underlying communication
+   * channel gets into some kind of error situation.
+   */
+  void set errorHandler(void callback());
+}
+
+
+class StreamException implements Exception {
+  const StreamException([String this.message = ""]);
+  String toString() => "StreamException: $message";
+  final String message;
+}