github.com/igggame/nebulas-go@v2.1.0+incompatible/nbre/fs/blockchain/trie/byte_shared.h (about)

     1  // Copyright (C) 2018 go-nebulas authors
     2  //
     3  // This file is part of the go-nebulas library.
     4  //
     5  // the go-nebulas library is free software: you can redistribute it and/or
     6  // modify
     7  // it under the terms of the GNU General Public License as published by
     8  // the Free Software Foundation, either version 3 of the License, or
     9  // (at your option) any later version.
    10  //
    11  // the go-nebulas library is distributed in the hope that it will be useful,
    12  // but WITHOUT ANY WARRANTY; without even the implied warranty of
    13  // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    14  // GNU General Public License for more details.
    15  //
    16  // You should have received a copy of the GNU General Public License
    17  // along with the go-nebulas library.  If not, see
    18  // <http://www.gnu.org/licenses/>.
    19  //
    20  
    21  #pragma once
    22  #include "common/common.h"
    23  
    24  namespace neb {
    25  namespace fs {
    26  class byte_shared {
    27  public:
    28    inline byte_shared() { m_data.m_data = 0; }
    29    inline byte_shared(byte_t data) { m_data.m_data = data; }
    30    inline byte_shared(byte_t bits_low, byte_t bits_high) {
    31      m_data.m_detail.m_bits_low = bits_low;
    32      m_data.m_detail.m_bits_high = bits_high;
    33    }
    34  
    35    byte_shared(const byte_shared &) = default;
    36    byte_shared &operator=(const byte_shared &) = default;
    37  
    38    inline byte_t bits_low() const { return m_data.m_detail.m_bits_low; }
    39    inline byte_t bits_high() const { return m_data.m_detail.m_bits_high; }
    40  
    41    inline byte_t data() const { return m_data.m_data; }
    42  
    43  private:
    44    union _byte_shared_data_t {
    45      byte_t m_data;
    46      struct _byte_shared_detail_t {
    47        byte_t m_bits_low : 4;
    48        byte_t m_bits_high : 4;
    49      };
    50      _byte_shared_detail_t m_detail;
    51    };
    52  
    53    _byte_shared_data_t m_data;
    54  };
    55  } // namespace fs
    56  } // namespace neb