/*
//@HEADER
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//
//                        Kokkos v. 3.0
//       Copyright (2020) National Technology & Engineering
//               Solutions of Sandia, LLC (NTESS).
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// Under the terms of Contract DE-NA0003525 with NTESS,
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#ifndef KOKKOS_BITSET_IMPL_HPP
#define KOKKOS_BITSET_IMPL_HPP

#include <Kokkos_Macros.hpp>
#include <impl/Kokkos_BitOps.hpp>
#include <cstdint>

#include <cstdio>
#include <climits>
#include <iostream>
#include <iomanip>

namespace Kokkos {
namespace Impl {

KOKKOS_FORCEINLINE_FUNCTION
unsigned rotate_right(unsigned i, int r) {
  enum { size = static_cast<int>(sizeof(unsigned) * CHAR_BIT) };
  return r ? ((i >> r) | (i << (size - r))) : i;
}

template <typename Bitset>
struct BitsetCount {
  typedef Bitset bitset_type;
  typedef
      typename bitset_type::execution_space::execution_space execution_space;
  typedef typename bitset_type::size_type size_type;
  typedef size_type value_type;

  bitset_type m_bitset;

  BitsetCount(bitset_type const& bitset) : m_bitset(bitset) {}

  size_type apply() const {
    size_type count = 0u;
    parallel_reduce("Kokkos::Impl::BitsetCount::apply",
                    m_bitset.m_blocks.extent(0), *this, count);
    return count;
  }

  KOKKOS_INLINE_FUNCTION
  void init(value_type& count) const { count = 0u; }

  KOKKOS_INLINE_FUNCTION
  void join(volatile value_type& count, const volatile size_type& incr) const {
    count += incr;
  }

  KOKKOS_INLINE_FUNCTION
  void operator()(size_type i, value_type& count) const {
    count += bit_count(m_bitset.m_blocks[i]);
  }
};

}  // namespace Impl
}  // namespace Kokkos

#endif  // KOKKOS_BITSET_IMPL_HPP
