1 files changed, 55 insertions, 0 deletions
diff --git a/gr-blocks/include/blocks/head.h b/gr-blocks/include/blocks/head.h
new file mode 100644
index 0000000000..cc7d3808e5
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+++ b/gr-blocks/include/blocks/head.h
@@ -0,0 +1,55 @@
+/* -*- c++ -*- */
+/*
+ * Copyright 2004,2009,2012,2013 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 3, 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., 51 Franklin Street,
+ * Boston, MA 02110-1301, USA.
+ */
+
+#ifndef INCLUDED_GR_HEAD_H
+#define INCLUDED_GR_HEAD_H
+
+#include <blocks/api.h>
+#include <gr_sync_block.h>
+#include <stddef.h>			// size_t
+
+namespace gr {
+  namespace blocks {
+
+    /*!
+     * \brief copies the first N items to the output then signals done
+     * \ingroup slicedice_blk
+     *
+     * Useful for building test cases
+     */
+    class BLOCKS_API head : virtual public gr_sync_block
+    {
+    public:
+      // gr::blocks::head::sptr
+      typedef boost::shared_ptr<head> sptr;
+
+      static sptr make(size_t sizeof_stream_item,
+                       uint64_t nitems);
+
+      virtual void reset() = 0;
+      virtual void set_length(int nitems) = 0;
+    };
+
+  } /* namespace blocks */
+} /* namespace gr */
+
+#endif /* INCLUDED_GR_HEAD_H */