text: //
  // Copyright(c) 2015 Gabi Melman.
  // Distributed under the MIT License (http://opensource.org/licenses/MIT)
  //
  
  #pragma once
  
  #include "../common.h"
  
  #ifdef SPDLOG_ENABLE_SYSLOG
  
  #include "sink.h"
  #include "../details/log_msg.h"
  
  #include <array>
  #include <string>
  #include <syslog.h>
  
  
  namespace spdlog
  {
  namespace sinks
  {
  /**
   * Sink that write to syslog using the `syscall()` library call.
   *
   * Locking is not needed, as `syslog()` itself is thread-safe.
   */
  class syslog_sink : public sink
  {
  public:
      //
      syslog_sink(const std::string& ident = "", int syslog_option=0, int syslog_facility=LOG_USER):
          _ident(ident)
      {
          _priorities[static_cast<size_t>(level::trace)] = LOG_DEBUG;
          _priorities[static_cast<size_t>(level::debug)] = LOG_DEBUG;
          _priorities[static_cast<size_t>(level::info)] = LOG_INFO;
          _priorities[static_cast<size_t>(level::warn)] = LOG_WARNING;
          _priorities[static_cast<size_t>(level::err)] = LOG_ERR;
          _priorities[static_cast<size_t>(level::critical)] = LOG_CRIT;
          _priorities[static_cast<size_t>(level::off)] = LOG_INFO;
  
          //set ident to be program name if empty
          ::openlog(_ident.empty()? nullptr:_ident.c_str(), syslog_option, syslog_facility);
      }
  
      ~syslog_sink() override
      {
          ::closelog();
      }
  
      syslog_sink(const syslog_sink&) = delete;
      syslog_sink& operator=(const syslog_sink&) = delete;
  
      void log(const details::log_msg &msg) override
      {
          ::syslog(syslog_prio_from_level(msg), "%s", msg.raw.str().c_str());
      }
  
      void flush() override
      {
      }
  
  
  private:
      std::array<int, 7> _priorities;
      //must store the ident because the man says openlog might use the pointer as is and not a string copy
      const std::string _ident;
  
      //
      // Simply maps spdlog's log level to syslog priority level.
      //
      int syslog_prio_from_level(const details::log_msg &msg) const
      {
          return _priorities[static_cast<size_t>(msg.level)];
      }
  };
  }
  }
  
  #endif
  