dart:convert library.

sdk/lib/convert/json.dart

Index: sdk/lib/convert/json.dart
diff --git a/sdk/lib/convert/json.dart b/sdk/lib/convert/json.dart
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index 0000000000000000000000000000000000000000..6b4d9da30539070d4abe44ac28b09ee493d11ba9
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+++ b/sdk/lib/convert/json.dart
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+// 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.
+
+part of dart.convert;
+
+class JsonEncoder extends Converter<Object, String> {
+  JsonEncoder();
+
+  String convert(Object o) => JSON_LIB.stringify(o);
+
+  ChunkedConversionSink<Object> startChunkedConversion(
+      ChunkedConversionSink sink) {
+    return new _JsonEncoderSink(outputInterface.adapt(sink));
+  }
+
+  ChunkedConversionInterface get outputInterface =>
+      StringConversionSink.INTERFACE;
+}
+
+class JsonDecoder extends Converter<String, Object> {
+  final _reviver;
+  JsonDecoder(this._reviver);
+
+  Object convert(String input) => JSON_LIB.parse(input, _reviver);
+
+  StringConversionSink startChunkedConversion(ChunkedConversionSink sink) {
+    return new _JsonDecoderSink(_reviver, outputInterface.adapt(sink));
+  }
+
+  ChunkedConversionInterface get inputInterface =>
+      StringConversionSink.INTERFACE;
+}
+
+class _JsonDecoderSink extends StringConversionSinkBase {
+  final _reviver;
+  ChunkedConversionSink _sink;
+  List<String> _carry = <String>[];
+
+  _JsonDecoderSink(this._reviver, this._sink);
+
+  void add(String str) => _carry.add(str);
+  void close() => _sink.addNonChunked(_convert(_carry.join()));
+
+  Object _convert(String input) {
+    return JSON_LIB.parse(input, _reviver);
+  }
+}
+
+class _JsonEncoderSink extends ChunkedConversionSink<Object> {
+  StringConversionSink _sink;
+
+  _JsonEncoderSink(this._sink);
+
+  void addNonChunked(Object o) {
+    JSON_LIB.printOn(o, _sink);
+    _sink.close();
+  }
+}