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/PageCompiler/src/PageReader.h

@@ -0,0 +1,92 @@
+//
+// PageReader.h
+//
+// Copyright (c) 2008, Applied Informatics Software Engineering GmbH.
+// and Contributors.
+//
+// SPDX-License-Identifier:	BSL-1.0
+//
+
+
+#ifndef PageReader_INCLUDED
+#define PageReader_INCLUDED
+
+
+#include "Poco/Poco.h"
+#include <istream>
+#include <ostream>
+#include <sstream>
+
+
+class Page;
+
+
+class PageReader
+	/// This class implements the parser for reading page files
+	/// containing JSP-style tags.
+{
+public:
+	PageReader(Page& page, const std::string& path);
+		/// Creates the PageReader, using the given Page.
+
+	PageReader(const PageReader& parent, const std::string& path);
+		/// Creates the PageReader, using the given PageReader as parent.
+
+	~PageReader();
+		/// Destroys the PageReader.
+
+	void parse(std::istream& pageStream);	
+		/// Parses a HTML file containing server page directives,
+		/// converts the file into C++ code and adds the code
+		/// to the reader's Page object. Also parses page
+		/// attributes and include directives.
+
+	void emitLineDirectives(bool flag = true);
+		/// Enables writing of #line directives to generated code.
+
+protected:
+	enum ParsingState
+	{
+		STATE_MARKUP,
+		STATE_IMPLDECL,
+		STATE_HDRDECL,
+		STATE_PREHANDLER,
+		STATE_BLOCK,
+		STATE_EXPR,
+		STATE_ESC_EXPR,
+		STATE_COMMENT,
+		STATE_ATTR
+	};
+
+	static const std::string MARKUP_BEGIN;
+	static const std::string MARKUP_END;
+	static const std::string EXPR_BEGIN;
+	static const std::string EXPR_END;
+	static const std::string ESC_EXPR_BEGIN;
+	static const std::string ESC_EXPR_END;
+
+	void include(const std::string& path);
+	void parseAttributes();
+	void nextToken(std::istream& istr, std::string& token);
+	void handleAttribute(const std::string& name, const std::string& value);
+	std::string where() const;
+	bool escape() const;
+
+protected:
+	void generateLineDirective(std::ostream& ostr);
+	
+private:
+	PageReader();
+	PageReader(const PageReader&);
+	PageReader& operator = (const PageReader&);
+
+	Page& _page;
+	const PageReader* _pParent;
+	std::string _path;
+	std::string _attrs;
+	std::streamsize _line;
+	bool _emitLineDirectives;
+};
+
+
+#endif // PageReader_INCLUDED