text: /*
   * Copyright (c) 2014, Peter Thorson. All rights reserved.
   *
   * Redistribution and use in source and binary forms, with or without
   * modification, are permitted provided that the following conditions are met:
   *     * Redistributions of source code must retain the above copyright
   *       notice, this list of conditions and the following disclaimer.
   *     * 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.
   *     * Neither the name of the WebSocket++ Project 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 PETER THORSON 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.
   *
   *
   * The initial version of this logging policy was contributed to the WebSocket++
   * project by Tom Hughes.
   */
  
  #ifndef WEBSOCKETPP_LOGGER_SYSLOG_HPP
  #define WEBSOCKETPP_LOGGER_SYSLOG_HPP
  
  #include <syslog.h>
  
  #include <websocketpp/logger/basic.hpp>
  
  #include <websocketpp/common/cpp11.hpp>
  #include <websocketpp/logger/levels.hpp>
  
  namespace ws_websocketpp {
  namespace log {
  
  /// Basic logger that outputs to syslog
  template <typename concurrency, typename names>
  class syslog : public basic<concurrency, names> {
  public:
      typedef basic<concurrency, names> base;
  
      /// Construct the logger
      /**
       * @param hint A channel type specific hint for how to construct the logger
       */
      syslog<concurrency,names>(channel_type_hint::value hint =
          channel_type_hint::access)
        : basic<concurrency,names>(hint), m_channel_type_hint(hint) {}
  
      /// Construct the logger
      /**
       * @param channels A set of channels to statically enable
       * @param hint A channel type specific hint for how to construct the logger
       */
      syslog<concurrency,names>(level channels, channel_type_hint::value hint =
          channel_type_hint::access)
        : basic<concurrency,names>(channels, hint), m_channel_type_hint(hint) {}
  
      /// Write a string message to the given channel
      /**
       * @param channel The channel to write to
       * @param msg The message to write
       */
      void write(level channel, std::string const & msg) {
          write(channel, msg.c_str());
      }
  
      /// Write a cstring message to the given channel
      /**
       * @param channel The channel to write to
       * @param msg The message to write
       */
      void write(level channel, char const * msg) {
          scoped_lock_type lock(base::m_lock);
          if (!this->dynamic_test(channel)) { return; }
          ::syslog(syslog_priority(channel), "[%s] %s",
              names::channel_name(channel), msg);
      }
  private:
      typedef typename base::scoped_lock_type scoped_lock_type;
  
      /// The default level is used for all access logs and any error logs that
      /// don't trivially map to one of the standard syslog levels.
      static int const default_level = LOG_INFO;
  
      /// retrieve the syslog priority code given a WebSocket++ channel
      /**
       * @param channel The level to look up
       * @return The syslog level associated with `channel`
       */
      int syslog_priority(level channel) const {
          if (m_channel_type_hint == channel_type_hint::access) {
              return syslog_priority_access(channel);
          } else {
              return syslog_priority_error(channel);
          }
      }
  
      /// retrieve the syslog priority code given a WebSocket++ error channel
      /**
       * @param channel The level to look up
       * @return The syslog level associated with `channel`
       */
      int syslog_priority_error(level channel) const {
          switch (channel) {
              case elevel::devel:
                  return LOG_DEBUG;
              case elevel::library:
                  return LOG_DEBUG;
              case elevel::info:
                  return LOG_INFO;
              case elevel::warn:
                  return LOG_WARNING;
              case elevel::rerror:
                  return LOG_ERR;
              case elevel::fatal:
                  return LOG_CRIT;
              default:
                  return default_level;
          }
      }
  
      /// retrieve the syslog priority code given a WebSocket++ access channel
      /**
       * @param channel The level to look up
       * @return The syslog level associated with `channel`
       */
      _WEBSOCKETPP_CONSTEXPR_TOKEN_ int syslog_priority_access(level) const {
          return default_level;
      }
  
      channel_type_hint::value m_channel_type_hint;
  };
  
  } // log
  } // websocketpp
  
  #endif // WEBSOCKETPP_LOGGER_SYSLOG_HPP
  