Pill.hpp

   1 #ifndef PILL_DOT_HPP
   2 #define PILL_DOT_HPP
   3
   4 #include <climits>
   5 #include <cstddef>
   6 #include <cstring>
   7 #include <ostream>
   8 #include <string_view>
   9
  10 // A pill is a unit of entropy.
  11
  12 class Pill {
  13 public:
  14   Pill();
  15
  16   bool operator==(Pill const& that) const { return this->s_ == that.s_; }
  17   bool operator!=(Pill const& that) const { return !(*this == that); }
  18
  19   std::string_view as_string_view() const
  20   {
  21     return std::string_view{b32_str_, strlen(b32_str_)};
  22   }
  23
  24 private:
  25   unsigned long long s_;
  26
  27   auto static constexpr b32_ndigits_ = ((sizeof(s_) * CHAR_BIT) + 4) / 5;
  28   char b32_str_[b32_ndigits_ + 1];
  29
  30   friend std::ostream& operator<<(std::ostream& s, Pill const& p)
  31   {
  32     return s << p.b32_str_;
  33   }
  34 };
  35
  36 #endif // PILL_DOT_HPP