text: /*
   * Copyright (C) 2014 Open Source Robotics Foundation
   *
   * Licensed under the Apache License, Version 2.0 (the "License");
   * you may not use this file except in compliance with the License.
   * You may obtain a copy of the License at
   *
   *     http://www.apache.org/licenses/LICENSE-2.0
   *
   * Unless required by applicable law or agreed to in writing, software
   * distributed under the License is distributed on an "AS IS" BASIS,
   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
   * See the License for the specific language governing permissions and
   * limitations under the License.
   *
  */
  
  #ifndef __IGN_TRANSPORT_HELPERS_HH_INCLUDED__
  #define __IGN_TRANSPORT_HELPERS_HH_INCLUDED__
  
  #include <cstdio>
  #include <cstring>
  #include <string>
  
  /// \def IGNITION_TRANSPORT_VISIBLE
  /// Use to represent "symbol visible" if supported
  
  /// \def IGNITION_HIDDEN
  /// Use to represent "symbol hidden" if supported
  
  #if defined BUILDING_STATIC_LIBS
    #define IGNITION_TRANSPORT_VISIBLE
    #define IGNITION_HIDDEN
  #else
    #if defined __WIN32 || defined __CYGWIN__
      #ifdef BUILDING_DLL
        #ifdef __GNUC__
          #define IGNITION_TRANSPORT_VISIBLE __attribute__ ((dllexport))
        #else
          #define IGNITION_TRANSPORT_VISIBLE __declspec(dllexport)
        #endif
      #else
        #ifdef __GNUC__
          #define IGNITION_TRANSPORT_VISIBLE __attribute__ ((dllimport))
        #else
          #define IGNITION_TRANSPORT_VISIBLE __declspec(dllimport)
        #endif
      #endif
      #define IGNITION_HIDDEN
    #else
      #if __GNUC__ >= 4
        #define IGNITION_TRANSPORT_VISIBLE __attribute__ ((visibility ("default")))
        #define IGNITION_HIDDEN  __attribute__ ((visibility ("hidden")))
      #else
        #define IGNITION_TRANSPORT_VISIBLE
        #define IGNITION_HIDDEN
      #endif
    #endif
  // BUILDING_STATIC_LIBS
  #endif
  
   namespace ignition
   {
     namespace transport
     {
       /// \brief Find the environment variable '_name' and return its value.
       /// \param[in] _name Name of the environment variable.
       /// \param[out] _value Value if the variable was found.
       /// \return True if the variable was found or false otherwise.
       IGNITION_TRANSPORT_VISIBLE
       bool env(const std::string &_name,
                std::string &_value);
     }
   }
  
  // Use safer functions on Windows
  #ifdef _MSC_VER
    #define ign_strcat strcat_s
    #define ign_strcpy strcpy_s
    #define ign_sprintf sprintf_s
    #define ign_strdup _strdup
  #else
    #define ign_strcat std::strcat
    #define ign_strcpy std::strcpy
    #define ign_sprintf std::sprintf
    #define ign_strdup strdup
  #endif
  
  // __IGN_TRANSPORT_HELPERS_HH_INCLUDED__
  #endif
  