imemstream.hpp

   1 #ifndef IMEMSTREAM_DOT_HPP
   2 #define IMEMSTREAM_DOT_HPP
   3
   4 #include <istream>
   5 #include <streambuf>
   6 #include <string_view>
   7
   8 struct membuf : std::streambuf {
   9   membuf(char const* base, size_t size)
  10   {
  11     auto p = const_cast<char*>(base);
  12     this->setg(p, p, p + size);
  13   }
  14 };
  15
  16 struct imemstream : virtual membuf, std::istream {
  17   imemstream(char const* base, size_t size)
  18     : membuf(base, size)
  19     , std::istream(static_cast<std::streambuf*>(this))
  20   {
  21   }
  22   imemstream(std::string_view s)
  23     : membuf(s.data(), s.length())
  24     , std::istream(static_cast<std::streambuf*>(this))
  25   {
  26   }
  27 };
  28
  29 #endif // IMEMSTREAM_DOT_HPP