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/Foundation/include/Poco/FileStream.h

@@ -0,0 +1,172 @@
+//
+// FileStream.h
+//
+// Library: Foundation
+// Package: Streams
+// Module:  FileStream
+//
+// Definition of the FileStreamBuf, FileInputStream and FileOutputStream classes.
+//
+// Copyright (c) 2007, Applied Informatics Software Engineering GmbH.
+// and Contributors.
+//
+// SPDX-License-Identifier:	BSL-1.0
+//
+
+
+#ifndef Foundation_FileStream_INCLUDED
+#define Foundation_FileStream_INCLUDED
+
+
+#include "Poco/Foundation.h"
+#if defined(POCO_OS_FAMILY_WINDOWS)
+#include "Poco/FileStream_WIN32.h"
+#else
+#include "Poco/FileStream_POSIX.h"
+#endif
+#include <istream>
+#include <ostream>
+
+
+namespace Poco {
+
+
+class Foundation_API FileIOS: public virtual std::ios
+	/// The base class for FileInputStream and FileOutputStream.
+	///
+	/// This class is needed to ensure the correct initialization
+	/// order of the stream buffer and base classes.
+	///
+	/// Files are always opened in binary mode, a text mode
+	/// with CR-LF translation is not supported. Thus, the
+	/// file is always opened as if the std::ios::binary flag
+	/// was specified.
+	/// Use an InputLineEndingConverter or OutputLineEndingConverter
+	/// if you require CR-LF translation.
+	///
+	/// On Windows platforms, UTF-8 encoded Unicode paths are correctly handled.
+{
+public:
+	FileIOS(std::ios::openmode defaultMode);
+		/// Creates the basic stream.
+		
+	~FileIOS();
+		/// Destroys the stream.
+
+	void open(const std::string& path, std::ios::openmode mode);
+		/// Opens the file specified by path, using the given mode.
+		///
+		/// Throws a FileException (or a similar exception) if the file 
+		/// does not exist or is not accessible for other reasons and
+		/// a new file cannot be created.
+
+	void close();
+		/// Closes the file stream.
+		///
+		/// If, for an output stream, the close operation fails (because
+		/// the contents of the stream buffer cannot synced back to
+		/// the filesystem), the bad bit is set in the stream state.
+
+	FileStreamBuf* rdbuf();
+		/// Returns a pointer to the underlying streambuf.
+
+protected:
+	FileStreamBuf _buf;
+	std::ios::openmode _defaultMode;
+};
+
+
+class Foundation_API FileInputStream: public FileIOS, public std::istream
+	/// An input stream for reading from a file.
+	///
+	/// Files are always opened in binary mode, a text mode
+	/// with CR-LF translation is not supported. Thus, the
+	/// file is always opened as if the std::ios::binary flag
+	/// was specified.
+	/// Use an InputLineEndingConverter if you require CR-LF translation.
+	///
+	/// On Windows platforms, UTF-8 encoded Unicode paths are correctly handled.
+{
+public:
+	FileInputStream();
+		/// Creates an unopened FileInputStream.
+	
+	FileInputStream(const std::string& path, std::ios::openmode mode = std::ios::in);
+		/// Creates the FileInputStream for the file given by path, using
+		/// the given mode.
+		///
+		/// The std::ios::in flag is always set, regardless of the actual
+		/// value specified for mode.
+		///
+		/// Throws a FileNotFoundException (or a similar exception) if the file 
+		/// does not exist or is not accessible for other reasons.
+
+	~FileInputStream();
+		/// Destroys the stream.
+};
+
+
+class Foundation_API FileOutputStream: public FileIOS, public std::ostream
+	/// An output stream for writing to a file.
+	///
+	/// Files are always opened in binary mode, a text mode
+	/// with CR-LF translation is not supported. Thus, the
+	/// file is always opened as if the std::ios::binary flag
+	/// was specified.
+	/// Use an OutputLineEndingConverter if you require CR-LF translation.
+	///
+	/// On Windows platforms, UTF-8 encoded Unicode paths are correctly handled.
+{
+public:
+	FileOutputStream();
+		/// Creats an unopened FileOutputStream.
+		
+	FileOutputStream(const std::string& path, std::ios::openmode mode = std::ios::out | std::ios::trunc);
+		/// Creates the FileOutputStream for the file given by path, using
+		/// the given mode.
+		///
+		/// The std::ios::out is always set, regardless of the actual 
+		/// value specified for mode.
+		///
+		/// Throws a FileException (or a similar exception) if the file 
+		/// does not exist or is not accessible for other reasons and
+		/// a new file cannot be created.
+
+	~FileOutputStream();
+		/// Destroys the FileOutputStream.
+};
+
+
+class Foundation_API FileStream: public FileIOS, public std::iostream
+	/// A stream for reading from and writing to a file.
+	///
+	/// Files are always opened in binary mode, a text mode
+	/// with CR-LF translation is not supported. Thus, the
+	/// file is always opened as if the std::ios::binary flag
+	/// was specified.
+	/// Use an InputLineEndingConverter or OutputLineEndingConverter
+	/// if you require CR-LF translation.
+	///
+	/// A seek (seekg() or seekp()) operation will always set the 
+	/// read position and the write position simultaneously to the
+	/// same value.
+	///
+	/// On Windows platforms, UTF-8 encoded Unicode paths are correctly handled.
+{
+public:
+	FileStream();
+		/// Creats an unopened FileStream.
+	
+	FileStream(const std::string& path, std::ios::openmode mode = std::ios::out | std::ios::in);
+		/// Creates the FileStream for the file given by path, using
+		/// the given mode.
+
+	~FileStream();
+		/// Destroys the FileOutputStream.
+};
+
+
+} // namespace Poco
+
+
+#endif // Foundation_FileStream_INCLUDED