FairMQ: Add plugin mechanism (Plugin and PluginManager classes)

fairmq/tools/FairMQTools.h

@@ -5,6 +5,7 @@
 
 #include <fairmq/tools/CppSTL.h>
 #include <fairmq/tools/Network.h>
+#include <fairmq/tools/Strings.h>
 
 namespace FairMQ
 {
@@ -17,6 +18,8 @@ using fair::mq::tools::getHostIPs;
 using fair::mq::tools::getInterfaceIP;
 using fair::mq::tools::getDefaultRouteNetworkInterface;
 
+using fair::mq::tools::S;
+
 } // namespace tools
 } // namespace FairMQ
 

fairmq/tools/Network.h

@@ -36,7 +36,7 @@ namespace tools
 {
 
 // returns a map with network interface names as keys and their IP addresses as values
-int getHostIPs(std::map<std::string, std::string>& addressMap)
+inline int getHostIPs(std::map<std::string, std::string>& addressMap)
 {
     struct ifaddrs *ifaddr, *ifa;
     int s;
@@ -73,7 +73,7 @@ int getHostIPs(std::map<std::string, std::string>& addressMap)
 }
 
 // get IP address of a given interface name
-std::string getInterfaceIP(std::string interface)
+inline std::string getInterfaceIP(std::string interface)
 {
     std::map<std::string, std::string> IPs;
     getHostIPs(IPs);
@@ -89,7 +89,7 @@ std::string getInterfaceIP(std::string interface)
 }
 
 // get name of the default route interface
-std::string getDefaultRouteNetworkInterface()
+inline std::string getDefaultRouteNetworkInterface()
 {
     std::array<char, 128> buffer;
     std::string interfaceName;

fairmq/tools/Strings.h

@@ -0,0 +1,53 @@
+/********************************************************************************
+ *    Copyright (C) 2017 GSI Helmholtzzentrum fuer Schwerionenforschung GmbH    *
+ *                                                                              *
+ *              This software is distributed under the terms of the             *
+ *              GNU Lesser General Public Licence (LGPL) version 3,             *
+ *                  copied verbatim in the file "LICENSE"                       *
+ ********************************************************************************/
+
+#ifndef FAIR_MQ_TOOLS_STRINGS_H
+#define FAIR_MQ_TOOLS_STRINGS_H
+
+#include <initializer_list>
+#include <sstream>
+#include <string>
+#include <vector>
+
+namespace fair
+{
+namespace mq
+{
+namespace tools
+{
+
+/// @brief concatenates a variable number of args with the << operator via a stringstream
+/// @param t objects to be concatenated
+/// @return concatenated string
+template<typename ... T>
+auto ToString(T&&... t) -> std::string
+{
+    std::stringstream ss;
+    (void)std::initializer_list<int>{(ss << t, 0)...};
+    return ss.str();
+}
+
+/// @brief convert command line arguments from main function to vector of strings
+inline auto ToStrVector(const int argc, const char* argv[], const bool dropProgramName = true) -> std::vector<std::string>
+{
+    auto res = std::vector<std::string>{};
+    if (dropProgramName)
+    {
+        res.assign(argv + 1, argv + argc);
+    } else
+    {
+        res.assign(argv, argv + argc);
+    }
+    return res;
+}
+
+} /* namespace tools */
+} /* namespace mq */
+} /* namespace fair */
+
+#endif /* FAIR_MQ_TOOLS_STRINGS_H */