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/Data/samples/RowFormatter/src/RowFormatter.cpp

@@ -0,0 +1,121 @@
+//
+// RowFormatter.cpp
+//
+// This sample demonstrates the Data library recordset row formatting
+// and streaming capabilities.
+//
+// Copyright (c) 2008, Applied Informatics Software Engineering GmbH.
+// and Contributors.
+//
+// SPDX-License-Identifier:	BSL-1.0
+
+
+#include "Poco/SharedPtr.h"
+#include "Poco/DateTime.h"
+#include "Poco/Data/SessionFactory.h"
+#include "Poco/Data/Session.h"
+#include "Poco/Data/Statement.h"
+#include "Poco/Data/RecordSet.h"
+#include "Poco/Data/RowFormatter.h"
+#include "Poco/Data/SQLite/Connector.h"
+#include <iostream>
+
+
+using namespace Poco::Data::Keywords;
+using Poco::DateTime;
+using Poco::Data::Session;
+using Poco::Data::Statement;
+using Poco::Data::RecordSet;
+using Poco::Data::RowFormatter;
+
+
+class HTMLTableFormatter : public RowFormatter
+{
+public:
+	HTMLTableFormatter()
+	{
+		std::ostringstream os;
+		os << "<TABLE border=\"1\" cellspacing=\"0\">" << std::endl;
+		setPrefix(os.str());
+		
+		os.str("");
+		os << "</TABLE>" << std::endl;
+		setPostfix(os.str());
+	}
+
+	std::string& formatNames(const NameVecPtr pNames, std::string& formattedNames)
+	{
+		std::ostringstream str;
+
+		str << "\t<TR>" << std::endl;
+		NameVec::const_iterator it = pNames->begin();
+		NameVec::const_iterator end = pNames->end();
+		for (; it != end; ++it)	str << "\t\t<TH align=\"center\">" << *it << "</TH>" << std::endl;
+		str << "\t</TR>" << std::endl;
+
+		return formattedNames = str.str();
+	}
+
+	std::string& formatValues(const ValueVec& vals, std::string& formattedValues)
+	{
+		std::ostringstream str;
+
+		str << "\t<TR>" << std::endl;
+		ValueVec::const_iterator it = vals.begin();
+		ValueVec::const_iterator end = vals.end();
+		for (; it != end; ++it)
+		{
+			if (it->isNumeric()) 
+				str << "\t\t<TD align=\"right\">";
+			else 
+				str << "\t\t<TD align=\"left\">";
+
+			str << it->convert<std::string>() << "</TD>" << std::endl;
+		}
+		str << "\t</TR>" << std::endl;
+
+		return formattedValues = str.str();
+	}
+};
+
+
+int main(int argc, char** argv)
+{
+	// register SQLite connector
+	Poco::Data::SQLite::Connector::registerConnector();
+	
+	// create a session
+	Session session("SQLite", "sample.db");
+
+	// drop sample table, if it exists
+	session << "DROP TABLE IF EXISTS Simpsons", now;
+	
+	// (re)create table
+	session << "CREATE TABLE Simpsons (Name VARCHAR(30), Address VARCHAR, Age INTEGER(3), Birthday DATE)", now;
+	
+	// insert some rows
+	DateTime hd(1956, 3, 1);
+	session << "INSERT INTO Simpsons VALUES('Homer Simpson', 'Springfield', 42, ?)", use(hd), now;
+	hd.assign(1954, 10, 1);
+	session << "INSERT INTO Simpsons VALUES('Marge Simpson', 'Springfield', 38, ?)", use(hd), now;
+	hd.assign(1980, 4, 1);
+	session << "INSERT INTO Simpsons VALUES('Bart Simpson', 'Springfield', 12, ?)", use(hd), now;
+	hd.assign(1982, 5, 9);
+	session << "INSERT INTO Simpsons VALUES('Lisa Simpson', 'Springfield', 10, ?)", use(hd), now;
+		
+	// create a statement and print the column names and data as HTML table
+	HTMLTableFormatter tf;
+	Statement stmt = (session << "SELECT * FROM Simpsons", format(tf), now);
+	RecordSet rs(stmt);
+	std::cout << rs << std::endl;
+
+	// Note: The code above is divided into individual steps for clarity purpose.
+	// The four lines can be reduced to the following single line:
+	std::cout << RecordSet(session, "SELECT * FROM Simpsons", HTMLTableFormatter());
+
+	// simple formatting example (uses the default SimpleRowFormatter provided by framework)
+	std::cout << std::endl << "Simple formatting:" << std::endl << std::endl;
+	std::cout << RecordSet(session, "SELECT * FROM Simpsons");
+
+	return 0;
+}