Protocol Buffer runtime library and 'protoc' plugin

lib/protobuf/plugin/Writer.dart

Index: lib/protobuf/plugin/Writer.dart
diff --git a/lib/protobuf/plugin/Writer.dart b/lib/protobuf/plugin/Writer.dart
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index 0000000000000000000000000000000000000000..7970183ea22ad431e115eec3b05023c8a67fc6e6
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+++ b/lib/protobuf/plugin/Writer.dart
@@ -0,0 +1,47 @@
+// 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.
+
+interface Writer {
+  void print(String out);
+  void println([String out]);
+}
+
+class AbstractWriter {
+  static String NEWLINE = "\n";
+  static List<int> NEWLINE_CHARS;
+  AbstractWriter() {
+    if(null === NEWLINE_CHARS) NEWLINE_CHARS = NEWLINE.charCodes();
+  }
+}
+
+class MemoryWriter extends AbstractWriter implements Writer {
+  MemoryWriter(): super(), _buffer = new StringBuffer();
+
+  void print(String out) {
+    _buffer.add(out);
+  }
+
+  void println([String out = null]) {
+    _buffer.add(out);
+    _buffer.add(AbstractWriter.NEWLINE);
+  }
+
+  String toString() {
+    return _buffer.toString();
+  }
+
+  StringBuffer _buffer;
+}
+
+class OutputStreamWriter extends AbstractWriter implements Writer {
+  OutputStreamWriter(OutputStream this._outStream) : super();
+  void print(String str) {
+    _outStream.write(str.charCodes());
+  }
+  void println([String out = null]) {
+    if(null !== out) print(out);
+    _outStream.write(AbstractWriter.NEWLINE_CHARS);
+  }
+  OutputStream _outStream;
+}