count_bits.h

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/* -*- c++ -*- */
/*
 * Copyright 2003,2013 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 _GR_COUNT_BITS_H_
#define _GR_COUNT_BITS_H_

#include <gnuradio/blocks/api.h>

namespace gr {
  namespace blocks {

    //! return number of set bits in the low  8 bits of x
    BLOCKS_API unsigned int count_bits8(unsigned int x);

    //! return number of set bits in the low 16 bits of x
    BLOCKS_API unsigned int count_bits16(unsigned int x);

    //! return number of set bits in the low 32 bits of x
    BLOCKS_API unsigned int count_bits32(unsigned int x);

    //! return number of set bits in a 64-bit word
    BLOCKS_API unsigned int count_bits64(unsigned long long int x);

  } /* namespace blocks */
} /* namespace gr */

#endif /* _GR_COUNT_BITS_H_ */