block/include/nil/crypto3/detail/make_uint_t.hpp
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2 // Copyright (c) 2018-2020 Mikhail Komarov <nemo@nil.foundation>
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23 //---------------------------------------------------------------------------///
24 
25 #ifndef CRYPTO3_MAKE_UINT_T_HPP
26 #define CRYPTO3_MAKE_UINT_T_HPP
27 
28 #include <tuple>
29 
30 #include <boost/integer.hpp>
31 
32 namespace nil {
33  namespace crypto3 {
34  namespace detail {
35  template<std::size_t Size, typename Integer>
36  static inline typename boost::uint_t<Size>::exact extract_uint_t(Integer v, std::size_t position) {
37  return static_cast<typename boost::uint_t<Size>::exact>(v >>
38  (((~position) & (sizeof(Integer) - 1)) << 3));
39  }
40 
41  template<std::size_t Size, typename T>
42  static inline typename boost::uint_t<Size>::exact make_uint_t(const std::initializer_list<T> &args) {
43  typedef typename std::initializer_list<T>::value_type value_type;
44  typename boost::uint_t<Size>::exact result = 0;
45 
46 
47  for (const value_type &itr : args) {
48  result = static_cast<typename boost::uint_t<Size>::exact>(
49  (result << std::numeric_limits<value_type>::digits) | itr);
50  }
51 
52  return result;
53  }
54 
55  template<std::size_t Size, typename... Args>
56  static inline typename boost::uint_t<Size>::exact make_uint_t(Args... args) {
57  return make_uint_t<Size, typename std::tuple_element<0, std::tuple<Args...>>::type>({args...});
58  }
59  } // namespace detail
60  } // namespace crypto3
61 } // namespace nil
62 
63 #endif // CRYPTO3_MAKE_UINT_T_HPP
Definition: pair.hpp:31