text: // Parts are Copyright (c) 2019, The Dinastycoin team
  //
  // All rights reserved.
  //
  // Redistribution and use in source and binary forms, with or without modification, are
  // permitted provided that the following conditions are met:
  //
  // 1. Redistributions of source code must retain the above copyright notice, this list of
  //    conditions and the following disclaimer.
  //
  // 2. Redistributions in binary form must reproduce the above copyright notice, this list
  //    of conditions and the following disclaimer in the documentation and/or other
  //    materials provided with the distribution.
  //
  // 3. Neither the name of the copyright holder nor the names of its contributors may be
  //    used to endorse or promote products derived from this software without specific
  //    prior written permission.
  //
  // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY
  // EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
  // MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL
  // THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  // SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
  // PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
  // INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
  // STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF
  // THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  
  #include "error.h"
  
  #include <string>
  
  namespace
  {
      struct net_category : std::error_category
      {
          net_category() noexcept
            : std::error_category()
          {}
  
          const char* name() const noexcept override
          {
              return "net::error_category";
          }
  
          std::string message(int value) const override
          {
              switch (net::error(value))
              {
              case net::error::expected_tld:
                  return "Expected top-level domain";
              case net::error::invalid_host:
                  return "Host value is not valid";
              case net::error::invalid_i2p_address:
                  return "Invalid I2P address";
              case net::error::invalid_port:
                  return "Invalid port value (expected 0-65535)";
              case net::error::invalid_tor_address:
                  return "Invalid Tor address";
              case net::error::unsupported_address:
                  return "Network address not supported";
              default:
                  break;
              }
  
              return "Unknown net::error";
          }
  
          std::error_condition default_error_condition(int value) const noexcept override
          {
              switch (net::error(value))
              {
              case net::error::invalid_port:
                  return std::errc::result_out_of_range;
              case net::error::expected_tld:
              case net::error::invalid_tor_address:
              default:
                  break;
              }
              return std::error_condition{value, *this};
          }
      };
  } // anonymous
  
  namespace net
  {
      std::error_category const& error_category() noexcept
      {
          static const net_category instance{};
          return instance;
      }
  }
  