block/include/nil/crypto3/block/accumulators/bits_count.hpp

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//---------------------------------------------------------------------------//
// Copyright (c) 2018-2020 Mikhail Komarov <nemo@nil.foundation>
// Copyright (c) 2019 Aleksey Moskvin <zerg1996@yandex.ru>
//
// MIT License
//
// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the "Software"), to deal
// in the Software without restriction, including without limitation the rights
// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
// copies of the Software, and to permit persons to whom the Software is
// furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in all
// copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
// SOFTWARE.
//---------------------------------------------------------------------------//
 
#ifndef CRYPTO3_BITS_COUNT_HPP
#define CRYPTO3_BITS_COUNT_HPP
 
#include <boost/mpl/always.hpp>
 
#include <boost/accumulators/framework/accumulator_base.hpp>
#include <boost/accumulators/framework/extractor.hpp>
#include <boost/accumulators/framework/depends_on.hpp>
#include <boost/accumulators/framework/parameters/sample.hpp>
 
#include <nil/crypto3/block/accumulators/parameters/bits.hpp>
 
namespace nil {
    namespace crypto3 {
        namespace accumulators {
            namespace impl {
 
                // bits_count_impl
                struct bits_count_impl : boost::accumulators::accumulator_base {
                    // for boost::result_of
                    typedef std::size_t result_type;
 
                    bits_count_impl(boost::accumulators::dont_care) : cnt(0) {
                    }
 
                    template<typename ArgumentPack>
                    inline void operator()(const ArgumentPack &args) {
                        resolve_type(args[boost::accumulators::sample], args[bits | std::size_t()]);
                    }
 
                    inline result_type result(boost::accumulators::dont_care) const {
                        return cnt;
                    }
 
                protected:
                    template<typename Block>
                    inline void resolve_type(const Block &value, std::size_t bits) {
                        cnt += bits;
                    }
 
                    std::size_t cnt;
                };
 
            }    // namespace impl
 
            // tag::count
            //
            namespace tag {
                struct bits_count : boost::accumulators::depends_on<> {
                    typedef boost::mpl::always<accumulators::impl::bits_count_impl> impl;
                };
            }    // namespace tag
 
            // extract::count
            //
            namespace extract {
                boost::accumulators::extractor<tag::bits_count> const bits_count = {};
 
                BOOST_ACCUMULATORS_IGNORE_GLOBAL(bits_count)
            }    // namespace extract
 
        }    // namespace accumulators
    }        // namespace crypto3
}    // namespace nil
#endif    // CRYPTO3_BLOCK_BITS_COUNT_HPP