Major plugin refactor and cleanup.

Switched to POCO library for unified platform/library interface.
Deprecated the external module API. It was creating more problems than solving.
Removed most built-in libraries in favor of system libraries for easier maintenance.
Cleaned and secured code with help from static analyzers.

vendor/POCO/XML/include/Poco/DOM/DOMWriter.h

@@ -0,0 +1,127 @@
+//
+// DOMWriter.h
+//
+// Library: XML
+// Package: DOM
+// Module:  DOMWriter
+//
+// Definition of class DOMWriter.
+//
+// Copyright (c) 2004-2006, Applied Informatics Software Engineering GmbH.
+// and Contributors.
+//
+// SPDX-License-Identifier:	BSL-1.0
+//
+
+
+#ifndef DOM_DOMWriter_INCLUDED
+#define DOM_DOMWriter_INCLUDED
+
+
+#include "Poco/XML/XML.h"
+#include "Poco/XML/XMLString.h"
+#include "Poco/XML/XMLStream.h"
+#include "Poco/TextEncoding.h"
+
+
+namespace Poco {
+namespace XML {
+
+
+class Node;
+class Document;
+
+
+class XML_API DOMWriter
+	/// The DOMWriter uses a DOMSerializer with an
+	/// XMLWriter to serialize a DOM document into
+	/// textual XML.
+{
+public:
+	DOMWriter();
+		/// Creates a DOMWriter.
+		
+	~DOMWriter();
+		/// Destroys a DOMWriter.
+
+	void setEncoding(const std::string& encodingName, Poco::TextEncoding& textEncoding);
+		/// Sets the encoding, which will be reflected in the written XML declaration.
+
+	const std::string& getEncoding() const;
+		/// Returns the encoding name set with setEncoding.
+
+	void setOptions(int options);
+		/// Sets options for the internal XMLWriter.
+		///
+		/// See class XMLWriter for available options.
+
+	int getOptions() const;
+		/// Returns the options for the internal XMLWriter.
+
+	void setNewLine(const std::string& newLine);
+		/// Sets the line ending characters for the internal
+		/// XMLWriter. See XMLWriter::setNewLine() for a list
+		/// of supported values. 
+
+	const std::string& getNewLine() const;
+		/// Returns the line ending characters used by the
+		/// internal XMLWriter.
+
+	void setIndent(const std::string& indent);
+		/// Sets the string used for one indentation step.
+		///
+		/// The default is a single TAB character.
+		/// The given string should only contain TAB or SPACE
+		/// characters (e.g., a single TAB character, or
+		/// two to four SPACE characters).
+		
+	const std::string& getIndent() const;
+		/// Returns the string used for one indentation step.
+
+	void writeNode(XMLByteOutputStream& ostr, const Node* pNode);
+		/// Writes the XML for the given node to the specified stream.
+
+	void writeNode(const std::string& systemId, const Node* pNode);
+		/// Writes the XML for the given node to the file specified in systemId,
+		/// using a standard file output stream (Poco::FileOutputStream).
+
+private:
+	std::string         _encodingName;
+	Poco::TextEncoding* _pTextEncoding;
+	int                 _options;
+	std::string         _newLine;
+	std::string         _indent;
+};
+
+
+//
+// inlines
+//
+inline const std::string& DOMWriter::getEncoding() const
+{
+	return _encodingName;
+}
+
+
+inline int DOMWriter::getOptions() const
+{
+	return _options;
+}
+
+
+inline const std::string& DOMWriter::getNewLine() const
+{
+	return _newLine;
+}
+
+
+inline const std::string& DOMWriter::getIndent() const
+{
+	return _indent;
+}
+
+
+} } // namespace Poco::XML
+
+
+#endif // DOM_DOMWriter_INCLUDED