added pre_shift method to gri_lfsr

git-svn-id: http://gnuradio.org/svn/gnuradio/trunk@9533 221aa14e-8319-0410-a670-987f0aec2ac5

1 files changed, 10 insertions, 0 deletions

diff --git a/gnuradio-core/src/lib/general/gri_lfsr.h b/gnuradio-core/src/lib/general/gri_lfsr.h
index c11eb048f..29873698c 100644
--- a/gnuradio-core/src/lib/general/gri_lfsr.h
+++ b/gnuradio-core/src/lib/general/gri_lfsr.h
@@ -98,6 +98,16 @@ class gri_lfsr
     return bit;
   }
 
+  /*!
+   * Rotate the register through x number of bits
+   * where we are just throwing away the results to get queued up correctly
+   */
+  void pre_shift(int num){
+    for(int i=0; i<num; i++){
+      next_bit();
+    }
+  }
+
   int mask() const { return d_mask; }
 };