Add module for calculating diagrams required for HVP counter-terms

extras/Hadrons/Modules/MScalar/VPCounterTerms.hpp

@@ -0,0 +1,55 @@
+#ifndef Hadrons_MScalar_VPCounterTerms_hpp_
+#define Hadrons_MScalar_VPCounterTerms_hpp_
+
+#include <Grid/Hadrons/Global.hpp>
+#include <Grid/Hadrons/Module.hpp>
+#include <Grid/Hadrons/ModuleFactory.hpp>
+
+BEGIN_HADRONS_NAMESPACE
+
+/******************************************************************************
+ *                         VPCounterTerms                                 *
+ ******************************************************************************/
+BEGIN_MODULE_NAMESPACE(MScalar)
+
+class VPCounterTermsPar: Serializable
+{
+public:
+    GRID_SERIALIZABLE_CLASS_MEMBERS(VPCounterTermsPar,
+                                    std::string, source,
+                                    double,      mass,
+                                    std::string, output,
+                                    std::vector<std::string>, outputMom);
+};
+
+class TVPCounterTerms: public Module<VPCounterTermsPar>
+{
+public:
+    SCALAR_TYPE_ALIASES(SIMPL,);
+public:
+    // constructor
+    TVPCounterTerms(const std::string name);
+    // destructor
+    virtual ~TVPCounterTerms(void) = default;
+    // dependency relation
+    virtual std::vector<std::string> getInput(void);
+    virtual std::vector<std::string> getOutput(void);
+    // setup
+    virtual void setup(void);
+    // execution
+    virtual void execute(void);
+private:
+    std::string                freeMomPropName_, GFSrcName_, phatsqName_, prop0Name_,
+                               twoscalarName_, twoscalarVertexName_,
+                               psquaredName_, psquaredVertexName_;
+    std::vector<std::string>   phaseName_;
+    std::vector<ScalarField *> phase_;
+};
+
+MODULE_REGISTER_NS(VPCounterTerms, TVPCounterTerms, MScalar);
+
+END_MODULE_NAMESPACE
+
+END_HADRONS_NAMESPACE
+
+#endif // Hadrons_MScalar_VPCounterTerms_hpp_