ArgsParser: add validate command line option

src/picongpu/ArgsParser.cpp

@@ -1,5 +1,5 @@
 /**
- * Copyright 2013 Axel Huebl, Felix Schmitt, Rene Widera
+ * Copyright 2013, 2015 Axel Huebl, Felix Schmitt, Rene Widera
  *
  * This file is part of PIConGPU.
  *
@@ -61,7 +61,7 @@ namespace picongpu
         return instance;
     }
 
-    bool ArgsParser::parse( int argc, char** argv )
+    ArgsParser::ArgsErrorCode ArgsParser::parse( int argc, char** argv )
     throw (std::runtime_error )
     {
         try
@@ -76,7 +76,8 @@ namespace picongpu
 
             // add possible options
             desc.add_options()
-                    ( "help,h", "print help message" )
+                    ( "help,h", "print help message and exit" )
+                    ( "validate", "validate command line parameters and exit" )
                     ( "config,c", po::value<std::vector<std::string> > ( &config_files )->multitoken( ), "Config file(s)" )
                     ;
 
@@ -109,16 +110,23 @@ namespace picongpu
             if ( vm.count( "help" ) )
             {
                 std::cerr << desc << "\n";
-                return false;
+                return SUCCESS_EXIT;
+            }
+            if ( vm.count( "validate" ) )
+            {
+                /* if we reach this part of code the parameters are valid
+                 * and the option `validate` is set.
+                 */
+                return SUCCESS_EXIT;
             }
         }
         catch ( boost::program_options::error& e )
         {
             std::cerr << e.what() << std::endl;
-            return false;
+            return ERROR;
         }
 
-        return true;
+        return SUCCESS;
     }
 
 }

src/picongpu/include/ArgsParser.hpp

@@ -1,5 +1,5 @@
 /**
- * Copyright 2013 Axel Huebl, Felix Schmitt, Rene Widera
+ * Copyright 2013, 2015 Axel Huebl, Felix Schmitt, Rene Widera
  *
  * This file is part of PIConGPU.
  *
@@ -19,9 +19,7 @@
  */
 
 
-
-#ifndef ARGSPARSER_HPP
-#define	ARGSPARSER_HPP
+#pragma once
 
 #include <boost/program_options/options_description.hpp>
 
@@ -44,6 +42,7 @@ namespace picongpu
     {
     public:
 
+        enum ArgsErrorCode {SUCCESS=0,SUCCESS_EXIT=1,ERROR=42};
         /**
          * Returns an instance of ArgsParser
          *
@@ -63,7 +62,7 @@ namespace picongpu
          * @param argv command line arguments
          * @return true if the simulation should proceed, false otherwise
          */
-        bool parse(int argc, char **argv) throw (std::runtime_error);
+        ArgsErrorCode parse(int argc, char **argv) throw (std::runtime_error);
 
 
 
@@ -79,6 +78,3 @@ namespace picongpu
     };
 
 }
-
-#endif	/* ARGSPARSER_HPP */
-

src/picongpu/include/simulationControl/ISimulationStarter.hpp

@@ -1,5 +1,5 @@
 /**
- * Copyright 2013 Rene Widera
+ * Copyright 2013, 2015 Rene Widera
  *
  * This file is part of PIConGPU.
  *
@@ -19,15 +19,12 @@
  */
 
 
-
-#ifndef ISIMULATIONSTARTER_HPP
-#define	ISIMULATIONSTARTER_HPP
-
-#include "types.h"
-#include "simulation_defines.hpp"
-
+#pragma once
 
 #include "pluginSystem/IPlugin.hpp"
+#include "ArgsParser.hpp"
+#include "simulation_defines.hpp"
+#include "types.h"
 
 namespace picongpu
 {
@@ -48,7 +45,7 @@ namespace picongpu
          *
          * @return true if no error else false
          */
-        virtual bool parseConfigs(int argc, char **argv) = 0;
+        virtual ArgsParser::ArgsErrorCode parseConfigs(int argc, char **argv) = 0;
 
         /*start simulation
          * is called after parsConfig and pluginLoad
@@ -66,6 +63,3 @@ namespace picongpu
         }
     };
 }
-
-#endif	/* ISIMULATIONSTARTER_HPP */
-

src/picongpu/include/simulationControl/SimulationStarter.hpp

@@ -1,5 +1,5 @@
 /**
- * Copyright 2013 Axel Huebl, Rene Widera
+ * Copyright 2013, 2015 Axel Huebl, Rene Widera
  *
  * This file is part of PIConGPU.
  *
@@ -94,7 +94,7 @@ namespace picongpu
         {
         }
 
-        bool parseConfigs(int argc, char **argv)
+        ArgsParser::ArgsErrorCode parseConfigs(int argc, char **argv)
         {
             ArgsParser& ap = ArgsParser::getInstance();
             PluginConnector& pluginConnector = Environment<>::get().PluginConnector();

src/picongpu/main.cu

@@ -1,5 +1,5 @@
 /**
- * Copyright 2013 Axel Huebl, Felix Schmitt, Heiko Burau, Rene Widera
+ * Copyright 2013-2015 Axel Huebl, Felix Schmitt, Heiko Burau, Rene Widera
  *
  * This file is part of PIConGPU.
  *
@@ -71,9 +71,13 @@ mallocMC::AlignmentPolicies::Shrink<>
 //use ScatterAllocator to replace malloc/free
 MALLOCMC_SET_ALLOCATOR_TYPE( ScatterAllocator );
 
+#include "ArgsParser.hpp"
+#include "communication/manager_common.h"
+#include "ArgsParser.hpp"
+
 #include <simulation_defines.hpp>
 #include <mpi.h>
-#include "communication/manager_common.h"
+
 
 using namespace PMacc;
 using namespace picongpu;
@@ -88,17 +92,24 @@ int main(int argc, char **argv)
     MPI_CHECK(MPI_Init(&argc, &argv));
 
     picongpu::simulation_starter::SimStarter sim;
-    if (!sim.parseConfigs(argc, argv))
-    {
-        MPI_CHECK(MPI_Finalize());
-        return 1;
-    }
+    ArgsParser::ArgsErrorCode parserCode = sim.parseConfigs(argc, argv);
+    int errorCode = 1;
 
-    sim.load();
-    sim.start();
-    sim.unload();
+    switch(parserCode)
+    {
+        case ArgsParser::ERROR:
+            errorCode = 1;
+            break;
+        case ArgsParser::SUCCESS:
+            sim.load();
+            sim.start();
+            sim.unload();
+            /*set error code to valid (1) after the simulation terminates*/
+        case ArgsParser::SUCCESS_EXIT:
+            errorCode = 0;
+            break;
+    };
 
     MPI_CHECK(MPI_Finalize());
-
-    return 0;
+    return errorCode;
 }