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/RecursiveDirectoryIterator.h

@@ -0,0 +1,254 @@
+//
+// RecursiveDirectoryIterator.h
+//
+// Library: Foundation
+// Package: Filesystem
+// Module:  RecursiveDirectoryIterator
+//
+// Definition of the RecursiveDirectoryIterator class.
+//
+// Copyright (c) 2012, Applied Informatics Software Engineering GmbH.
+// and Contributors.
+//
+// SPDX-License-Identifier:	BSL-1.0
+//
+
+
+#ifndef Foundation_RecursiveDirectoryIterator_INCLUDED
+#define Foundation_RecursiveDirectoryIterator_INCLUDED
+
+
+#include "Poco/Foundation.h"
+#include "Poco/File.h"
+#include "Poco/Path.h"
+#include "Poco/RecursiveDirectoryIteratorImpl.h"
+#include "Poco/DirectoryIteratorStrategy.h"
+
+
+namespace Poco {
+
+
+class DirectoryIterator;
+
+
+template<class TTravStr>
+class RecursiveDirectoryIteratorImpl;
+
+
+template<class TTravStr = ChildrenFirstTraverse>
+class RecursiveDirectoryIterator
+	/// The RecursiveDirectoryIterator class is used to enumerate
+	/// all files in a directory and its subdirectories.
+	///
+	/// RecursiveDirectoryIterator has some limitations:
+	///   * only forward iteration (++) is supported
+	///   * an iterator copied from another one will always
+	///     point to the same file as the original iterator,
+	///     even is the original iterator has been advanced
+	///     (all copies of an iterator share their state with
+	///     the original iterator)
+	///
+	/// The class can follow different traversal strategies:
+	///     * depth-first strategy;
+	///     * siblings-first strategy.
+	/// The strategies are set by template parameter.
+	/// There are two corresponding typedefs:
+	///     * SimpleRecursiveDirectoryIterator;
+	///     * SiblingsFirstRecursiveDirectoryIterator.
+	///
+	/// The depth of traversal can be limited by constructor
+	/// parameter maxDepth (which sets the infinite depth by default).
+{
+public:
+	typedef RecursiveDirectoryIterator<TTravStr> MyType;
+
+	enum
+	{
+		D_INFINITE = 0 /// Constant for infinite traverse depth.
+	};
+
+	RecursiveDirectoryIterator()
+		/// Creates the end iterator.
+		: _pImpl(0)
+	{
+	}
+
+	RecursiveDirectoryIterator(const std::string& path, UInt16 maxDepth = D_INFINITE)
+		/// Creates a recursive directory iterator for the given path.
+		: _pImpl(new ImplType(path, maxDepth)), _path(Path(_pImpl->get())), _file(_path)
+	{
+	}
+
+	RecursiveDirectoryIterator(const MyType& iterator):
+		/// Creates a copy of another recursive directory iterator.
+		_pImpl(iterator._pImpl), _path(iterator._path), _file(iterator._file)
+	{
+	}
+
+	RecursiveDirectoryIterator(const DirectoryIterator& iterator, UInt16 maxDepth = D_INFINITE):
+		/// Creates a recursive directory iterator for the path of
+		/// non-recursive directory iterator.
+		_pImpl(new ImplType(iterator->path(), maxDepth)), _path(Path(_pImpl->get())), _file(_path)
+	{
+	}
+
+	RecursiveDirectoryIterator(const File& file, UInt16 maxDepth = D_INFINITE):
+		/// Creates a recursive directory iterator for the given path.
+		_pImpl(new ImplType(file.path(), maxDepth)), _path(Path(_pImpl->get())), _file(_path)
+	{
+	}
+
+	RecursiveDirectoryIterator(const Path& path, UInt16 maxDepth = D_INFINITE):
+		/// Creates a recursive directory iterator for the given path.
+		_pImpl(new ImplType(path.toString(), maxDepth)), _path(Path(_pImpl->get())), _file(_path)
+	{
+	}
+
+	~RecursiveDirectoryIterator()
+		/// Destroys the DirectoryIterator.
+	{
+		if (_pImpl)
+			_pImpl->release();
+	}
+
+	const std::string& name() const
+		/// Returns the current filename.
+	{
+		return _path.getFileName();
+	}
+
+	const Poco::Path& path() const
+		/// Returns the current path.
+	{
+		return _path;
+	}
+
+	UInt16 depth() const
+		/// Depth of recursion (counting from 1).
+	{
+		return _pImpl->depth();
+	}
+
+	UInt16 maxDepth() const
+		/// Max depth of recursion (counting from 1).
+	{
+		return _pImpl->maxDepth();
+	}
+
+
+	MyType& operator = (const MyType& it)
+	{
+		if (_pImpl)
+			_pImpl->release();
+		_pImpl = it._pImpl;
+		if (_pImpl)
+		{
+			_pImpl->duplicate();
+			_path = it._path;
+			_file = _path;
+		}
+		return *this;
+	}
+
+	MyType& operator = (const File& file)
+	{
+		if (_pImpl)
+			_pImpl->release();
+		_pImpl = new ImplType(file.path());
+		_path = Path(_pImpl->get());
+		_file = _path;
+		return *this;
+	}
+
+
+	MyType& operator = (const Path& path)
+	{
+		if (_pImpl)
+			_pImpl->release();
+		_pImpl = new ImplType(path.toString());
+		_path = Path(_pImpl->get());
+		_file = _path;
+		return *this;
+	}
+
+	MyType& operator = (const std::string& path)
+	{
+		if (_pImpl)
+			_pImpl->release();
+		_pImpl = new ImplType(path);
+		_path = Path(_pImpl->get());
+		_file = _path;
+		return *this;
+	}
+
+	MyType& operator ++ ()
+	{
+		if (_pImpl)
+		{
+			_path = Path(_pImpl->next());
+			_file = _path;
+		}
+		return *this;
+	}
+
+	const File& operator * () const
+	{
+		return _file;
+	}
+
+	File& operator *()
+	{
+		return _file;
+	}
+
+	const File* operator -> () const
+	{
+		return &_file;
+	}
+
+	File* operator -> ()
+	{
+		return &_file;
+	}
+
+	template<class T1, class T2>
+	friend inline bool operator ==(const RecursiveDirectoryIterator<T1>& a, const RecursiveDirectoryIterator<T2>& b);
+	template<class T1, class T2>
+	friend inline bool operator !=(const RecursiveDirectoryIterator<T1>& a, const RecursiveDirectoryIterator<T2>& b);
+
+private:
+	typedef RecursiveDirectoryIteratorImpl<TTravStr> ImplType;
+
+	ImplType* _pImpl;
+	Path _path;
+	File _file;
+};
+
+
+//
+// friend comparsion operators
+//
+template<class T1, class T2>
+inline bool operator ==(const RecursiveDirectoryIterator<T1>& a, const RecursiveDirectoryIterator<T2>& b)
+{
+	return a.path().toString() == b.path().toString();;
+}
+
+template<class T1, class T2>
+inline bool operator !=(const RecursiveDirectoryIterator<T1>& a, const RecursiveDirectoryIterator<T2>& b)
+{
+	return a.path().toString() != b.path().toString();;
+}
+
+
+//
+// typedefs
+//
+typedef RecursiveDirectoryIterator<ChildrenFirstTraverse> SimpleRecursiveDirectoryIterator;
+typedef RecursiveDirectoryIterator<SiblingsFirstTraverse> SiblingsFirstRecursiveDirectoryIterator;
+
+
+} // namespace Poco
+
+
+#endif // Foundation_RecursiveDirectoryIterator_INCLUDED