add JSONFormatter

Foundation/src/JSONString.cpp

@@ -0,0 +1,66 @@
+//
+// String.h
+//
+// $Id: //poco/1.4/Foundation/src/String.cpp#1 $
+//
+// 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"
+
+
+namespace Poco {
+
+
+std::string toJSON(char c)
+{
+	switch (c)
+	{
+	case '\\': return "\\\\";
+	case '"': return "\\\"";
+	case '/': return "\\/";
+	case '\b': return "\\b";
+	case '\f': return "\\f";
+	case '\n': return "\\n";
+	case '\r': return "\\r";
+	case '\t': return "\\t";
+	default: return std::string(1, c);
+	}
+}
+
+
+void toJSON(const std::string& value, std::ostream& out, bool wrap)
+{
+	if (wrap) out << '"';
+	for (std::string::const_iterator it = value.begin(),
+		end = value.end(); it != end; ++it)
+	{
+		out << toJSON(*it);
+	}
+	if (wrap) out << '"';
+}
+
+
+std::string toJSON(const std::string& value, bool wrap)
+{
+	std::string ret;
+	if (wrap) ret.append(1, '"');
+	for (std::string::const_iterator it = value.begin(),
+		end = value.end(); it != end; ++it)
+	{
+		ret.append(toJSON(*it));
+	}
+	if (wrap) ret.append(1, '"');
+	return ret;
+}
+
+
+} // namespace Poco