ceph/src/Beast/include/beast/core/detail/clamp.hpp

   1 //
   2 // Copyright (c) 2013-2017 Vinnie Falco (vinnie dot falco at gmail dot com)
   3 //
   4 // Distributed under the Boost Software License, Version 1.0. (See accompanying
   5 // file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
   6 //
   7
   8 #ifndef BEAST_CORE_DETAIL_CLAMP_HPP
   9 #define BEAST_CORE_DETAIL_CLAMP_HPP
  10
  11 #include <limits>
  12 #include <cstdlib>
  13
  14 namespace beast {
  15 namespace detail {
  16
  17 template<class UInt>
  18 static
  19 std::size_t
  20 clamp(UInt x)
  21 {
  22     if(x >= (std::numeric_limits<std::size_t>::max)())
  23         return (std::numeric_limits<std::size_t>::max)();
  24     return static_cast<std::size_t>(x);
  25 }
  26
  27 template<class UInt>
  28 static
  29 std::size_t
  30 clamp(UInt x, std::size_t limit)
  31 {
  32     if(x >= limit)
  33         return limit;
  34     return static_cast<std::size_t>(x);
  35 }
  36
  37 } // detail
  38 } // beast
  39
  40 #endif