Adding the Bu::DualFilter which could work out really well, it's going in for

testing now.  The idea is that it makes it easy to use a bi-directional stream
like a tcpstream that requires a seperate filter instance for each read and
write side.

2 files changed, 75 insertions, 0 deletions

diff --git a/src/unstable/dualfilter.cpp b/src/unstable/dualfilter.cpp
new file mode 100644
index 0000000..8d019de
--- /dev/null
+++ b/src/unstable/dualfilter.cpp
@@ -0,0 +1,8 @@
+/*
+ * Copyright (C) 2007-2013 Xagasoft, All rights reserved.
+ *
+ * This file is part of the libbu++ library and is released under the
+ * terms of the license contained in the file LICENSE.
+ */
+
+#include "dualfilter.h"
diff --git a/src/unstable/dualfilter.h b/src/unstable/dualfilter.h
new file mode 100644
index 0000000..ce6a13a
--- /dev/null
+++ b/src/unstable/dualfilter.h
@@ -0,0 +1,67 @@
+/*
+ * Copyright (C) 2007-2013 Xagasoft, All rights reserved.
+ *
+ * This file is part of the libbu++ library and is released under the
+ * terms of the license contained in the file LICENSE.
+ */
+
+#ifndef BU_DUAL_FILTER_H
+#define BU_DUAL_FILTER_H
+
+#include "bu/filter.h"
+
+namespace Bu
+{
+    template<typename Flt>
+    class DualFilter : public Bu::Filter
+    {
+    public:
+        DualFilter( Bu::Stream &rNext ) :
+            Bu::Filter( rNext ),
+            fRead( rNext ),
+            fWrite( rNext )
+        {
+        }
+
+        virtual ~DualFilter()
+        {
+        }
+
+        virtual void start()
+        {
+            fRead.start();
+            fWrite.start();
+        }
+
+        virtual Bu::size stop()
+        {
+            return fRead.stop() + fWrite.stop();
+        }
+
+        virtual void close()
+        {
+            Bu::Filter::close();
+            fRead.close();
+            fWrite.close();
+        }
+
+        virtual Bu::size read( void *pBuf, Bu::size iBytes )
+        {
+            return fRead.read( pBuf, iBytes );
+        }
+
+        virtual Bu::size write( void *pBuf, Bu::size iBytes )
+        {
+            return fWrite.write( pBuf, iBytes );
+        }
+
+        Flt &getReadFilter() { return fRead; }
+        Flt &getWriteFilter() { return fWrite; }
+
+    private:
+        Flt fRead;
+        Flt fWrite;
+    };
+};
+
+#endif