1 files changed, 52 insertions, 0 deletions
diff --git a/gr-blocks/lib/head_impl.h b/gr-blocks/lib/head_impl.h
new file mode 100644
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+++ b/gr-blocks/lib/head_impl.h
@@ -0,0 +1,52 @@
+/* -*- 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_IMPL_H
+#define INCLUDED_GR_HEAD_IMPL_H
+
+#include <blocks/head.h>
+
+namespace gr {
+  namespace blocks {
+
+    class head_impl : public head
+    {
+    private:
+      uint64_t d_nitems;
+      uint64_t d_ncopied_items;
+
+    public:
+      head_impl(size_t sizeof_stream_item, uint64_t nitems);
+      ~head_impl();
+
+      void reset() { d_ncopied_items = 0; }
+      void set_length(int nitems) { d_nitems = nitems; }
+
+      int work(int noutput_items,
+               gr_vector_const_void_star &input_items,
+               gr_vector_void_star &output_items);
+    };
+
+  } /* namespace blocks */
+} /* namespace gr */
+
+#endif /* INCLUDED_GR_HEAD_IMPL_H */