ceph/src/boost/boost/regex/v4/indexed_bit_flag.hpp

   1 /*
   2  *
   3  * Copyright (c) 2020
   4  * John Maddock
   5  *
   6  * Use, modification and distribution are subject to the
   7  * Boost Software License, Version 1.0. (See accompanying file
   8  * LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
   9  *
  10  */
  11
  12  /*
  13   *   LOCATION:    see http://www.boost.org for most recent version.
  14   *   FILE         basic_regex_parser.cpp
  15   *   VERSION      see <boost/version.hpp>
  16   *   DESCRIPTION: Declares template class basic_regex_parser.
  17   */
  18
  19 #include <boost/regex/config.hpp>
  20 #include <set>
  21
  22 #ifndef BOOST_REGEX_V4_INDEXED_BIT_FLAG_HPP
  23 #define BOOST_REGEX_V4_INDEXED_BIT_FLAG_HPP
  24
  25 namespace boost{
  26 namespace BOOST_REGEX_DETAIL_NS{
  27
  28 class indexed_bit_flag
  29 {
  30    boost::uint64_t low_mask;
  31    std::set<std::size_t> mask_set;
  32 public:
  33    indexed_bit_flag() : low_mask(0) {}
  34    void set(std::size_t i)
  35    {
  36       if (i < std::numeric_limits<boost::uint64_t>::digits - 1)
  37          low_mask |= static_cast<boost::uint64_t>(1u) << i;
  38       else
  39          mask_set.insert(i);
  40    }
  41    bool test(std::size_t i)
  42    {
  43       if (i < std::numeric_limits<boost::uint64_t>::digits - 1)
  44          return low_mask & static_cast<boost::uint64_t>(1u) << i ? true : false;
  45       else
  46          return mask_set.find(i) != mask_set.end();
  47    }
  48 };
  49
  50 } // namespace BOOST_REGEX_DETAIL_NS
  51 } // namespace boost
  52
  53
  54 #endif