1 files changed, 49 insertions, 0 deletions
diff --git a/gnuradio-core/src/lib/general/gr_nop.h b/gnuradio-core/src/lib/general/gr_nop.h
new file mode 100644
index 0000000000..faf938625d
--- /dev/null
+++ b/gnuradio-core/src/lib/general/gr_nop.h
@@ -0,0 +1,49 @@
+/* -*- c++ -*- */
+/*
+ * Copyright 2004 Free Software Foundation, Inc.
+ * 
+ * This file is part of GNU Radio
+ * 
+ * GNU Radio is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2, or (at your option)
+ * any later version.
+ * 
+ * GNU Radio 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 General Public License for more details.
+ * 
+ * You should have received a copy of the GNU General Public License
+ * along with GNU Radio; see the file COPYING.  If not, write to
+ * the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+ * Boston, MA 02111-1307, USA.
+ */
+
+#ifndef INCLUDED_GR_NOP_H
+#define INCLUDED_GR_NOP_H
+
+#include <gr_block.h>
+#include <stddef.h>			// size_t
+
+/*!
+ * \brief Does nothing.  Used for testing only.
+ * \ingroup block
+ */
+class gr_nop : public gr_block
+{
+  friend gr_block_sptr gr_make_nop (size_t sizeof_stream_item);
+
+  gr_nop (size_t sizeof_stream_item);
+
+ public:
+  virtual int general_work (int noutput_items,
+			    gr_vector_int &ninput_items,
+			    gr_vector_const_void_star &input_items,
+			    gr_vector_void_star &output_items);
+};
+
+gr_block_sptr
+gr_make_nop (size_t sizeof_stream_item);
+
+#endif /* INCLUDED_GR_NOP_H */