text: ///
  /// @file   bits.hpp
  /// @brief  Bitmasks to unset bits in the sieve array
  ///
  /// Copyright (C) 2017 Kim Walisch, <kim.walisch@gmail.com>
  ///
  /// This file is distributed under the BSD License. See the COPYING
  /// file in the top level directory.
  ///
  
  #ifndef BITS_HPP
  #define BITS_HPP
  
  enum
  {
    BIT0 = 0xfe, // 11111110
    BIT1 = 0xfd, // 11111101
    BIT2 = 0xfb, // 11111011
    BIT3 = 0xf7, // 11110111
    BIT4 = 0xef, // 11101111
    BIT5 = 0xdf, // 11011111
    BIT6 = 0xbf, // 10111111
    BIT7 = 0x7f  // 01111111
  };
  
  #endif
  