1 files changed, 87 insertions, 0 deletions
diff --git a/flow/virtualports.h b/flow/virtualports.h
new file mode 100644
index 0000000..5e70fbf
--- /dev/null
+++ b/flow/virtualports.h
@@ -0,0 +1,87 @@
+    /*
+
+    Copyright (C) 2000 Stefan Westerfeld
+                       stefan@space.twc.de
+
+    This library is free software; you can redistribute it and/or
+    modify it under the terms of the GNU Library General Public
+    License as published by the Free Software Foundation; either
+    version 2 of the License, or (at your option) any later version.
+  
+    This library is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+    Library General Public License for more details.
+   
+    You should have received a copy of the GNU Library General Public License
+    along with this library; see the file COPYING.LIB.  If not, write to
+    the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+    Boston, MA 02111-1307, USA.
+
+    */
+
+
+#ifndef VIRTUALPORTS_H
+#define VIRTUALPORTS_H
+
+#include "gslschedule.h"
+#include <list>
+
+/*
+ * BC - Status (2002-03-08): VPortConnection, VPort.
+ *
+ * None of these classes is considered part of the public API. Do NOT use it
+ * in your apps. These are part of the implementation of libartsflow's
+ * StdFlowSystem, and subject to change with the needs of it.
+ */
+
+namespace Arts {
+
+class VPortConnection {
+private:
+	friend class VPort;
+	VPort *source;
+	VPort *dest;
+
+public:
+	enum Style { vcForward, vcMasquerade, vcConnect, vcTransport } style;
+	VPortConnection(VPort *source, VPort *dest, Style style);
+	~VPortConnection();
+};
+
+class VPort {
+private:
+	friend class VPortConnection;
+protected:
+	Port *port;
+	std::string _name;
+	std::list<VPortConnection *> incoming, outgoing;
+
+	void makeTransport(VPortConnection *conn);
+	void removeTransport(VPortConnection *conn);
+	void expandHelper(VPortConnection *conn, int state, VPort *current,
+								VPort *source, VPort *dest, bool remove);
+
+	bool makeVirtualizeParams(VPort *forward, VPort *& source, VPort *& dest,
+									VPortConnection::Style &style);
+
+	const char *name();
+public:
+	VPort(Port *p);
+	~VPort();
+
+	void setFloatValue(float value);
+
+	void connect(VPort *vport);
+	void disconnect(VPort *port);
+
+	/**
+	 * a->virtualize(b) means that the functionality that port a should provide
+	 * (produce or consume data) is really provided by port b
+	 */
+	void virtualize(VPort *port);
+	void devirtualize(VPort *port);
+};
+}
+
+#endif /* VIRTUALPORTS_H */