back-port JSON and accompanying Foundation portions (JSONString, Dynamic::Var etc)

Foundation/src/JSONString.cpp

@@ -0,0 +1,38 @@
+//
+// String.h
+//
+// Library: Foundation
+// Package: Core
+// Module:  String
+//
+// Copyright (c) 2004-2006, Applied Informatics Software Engineering GmbH.
+// and Contributors.
+//
+// SPDX-License-Identifier:	BSL-1.0
+//
+
+#include "Poco/JSONString.h"
+#include "Poco/UTF8String.h"
+#include <ostream>
+
+namespace Poco {
+
+void toJSON(const std::string& value, std::ostream& out, bool wrap)
+{
+	if (wrap) out << '"';
+	out << UTF8::escape(value.begin(), value.end());
+	if (wrap) out << '"';
+}
+
+
+std::string toJSON(const std::string& value, bool wrap)
+{
+	std::string ret;
+	if (wrap) ret.append(1, '"');
+	ret.append(UTF8::escape(value.begin(), value.end()));
+	if (wrap) ret.append(1, '"');
+	return ret;
+}
+
+
+} // namespace Poco