JSONStream and tests

runtime/vm/json_stream.h

+// 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.
+
+#ifndef VM_JSON_STREAM_H_
+#define VM_JSON_STREAM_H_
+
+#include "platform/json.h"
+
+namespace dart {
+
+
+class JSONStream : ValueObject {
+ public:
+  explicit JSONStream(TextBuffer* buffer);
+  ~JSONStream();
+
+  void Clear();
+
+  void OpenObject(const char* property_name = NULL);
+  void CloseObject();
+
+  void OpenArray(const char* property_name = NULL);
+  void CloseArray();
+
+  void PrintValueBool(bool b);
+  void PrintValue(intptr_t i);
+  void PrintValue(double d);
+  void PrintValue(const char* s);
+
+  void PrintPropertyBool(const char* name, bool b);
+  void PrintProperty(const char* name, intptr_t i);
+  void PrintProperty(const char* name, double d);
+  void PrintProperty(const char* name, const char* s);
+
+ private:
+  void PrintPropertyName(const char* name);
+  void PrintCommaIfNeeded();
+  bool NeedComma();
+  intptr_t open_objects_;
+  TextBuffer* buffer_;
+};
+
+}  // namespace dart
+
+#endif  // VM_JSON_STREAM_H_