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-rw-r--r--gr-digital/include/digital_impl_glfsr.h57
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diff --git a/gr-digital/include/digital_impl_glfsr.h b/gr-digital/include/digital_impl_glfsr.h
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-/* -*- c++ -*- */
-/*
- * Copyright 2007,2012 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_DIGITAL_IMPL_GLFSR_H
-#define INCLUDED_DIGITAL_IMPL_GLFSR_H
-
-#include <digital_api.h>
-
-/*!
- * \brief Galois Linear Feedback Shift Register using specified polynomial mask
- * \ingroup misc
- *
- * Generates a maximal length pseudo-random sequence of length 2^degree-1
- */
-
-class DIGITAL_API digital_impl_glfsr
-{
- private:
- int d_shift_register;
- int d_mask;
-
- public:
-
- digital_impl_glfsr(int mask, int seed) { d_shift_register = seed; d_mask = mask; }
- static int glfsr_mask(int degree);
-
- unsigned char next_bit() {
- unsigned char bit = d_shift_register & 1;
- d_shift_register >>= 1;
- if (bit)
- d_shift_register ^= d_mask;
- return bit;
- }
-
- int mask() const { return d_mask; }
-};
-
-#endif /* INCLUDED_DIGITAL_IMPL_GLFSR_H */