pdns/views.hh

   1 /*
   2  * This file is part of PowerDNS or dnsdist.
   3  * Copyright -- PowerDNS.COM B.V. and its contributors
   4  *
   5  * This program is free software; you can redistribute it and/or modify
   6  * it under the terms of version 2 of the GNU General Public License as
   7  * published by the Free Software Foundation.
   8  *
   9  * In addition, for the avoidance of any doubt, permission is granted to
  10  * link this program with OpenSSL and to (re)distribute the binaries
  11  * produced as the result of such linking.
  12  *
  13  * This program is distributed in the hope that it will be useful,
  14  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16  * GNU General Public License for more details.
  17  *
  18  * You should have received a copy of the GNU General Public License
  19  * along with this program; if not, write to the Free Software
  20  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  21  */
  22 #pragma once
  23
  24 #include <string_view>
  25
  26 namespace pdns::views
  27 {
  28
  29 class UnsignedCharView
  30 {
  31 public:
  32   UnsignedCharView(const char* data_, size_t size_) :
  33     view(data_, size_)
  34   {
  35   }
  36   // NOLINTNEXTLINE(cppcoreguidelines-pro-type-reinterpret-cast): No unsigned char view in C++17
  37   UnsignedCharView(const unsigned char* data_, size_t size_) :
  38     view(reinterpret_cast<const char*>(data_), size_)
  39   {
  40   }
  41   const unsigned char& at(std::string_view::size_type pos) const
  42   {
  43     return reinterpret_cast<const unsigned char&>(view.at(pos));
  44   }
  45
  46   size_t size() const
  47   {
  48     return view.size();
  49   }
  50
  51 private:
  52   std::string_view view;
  53 };
  54
  55 }