Rename file format variable

src/ExternalPotential.C

@@ -51,7 +51,7 @@ void ExternalPotential::update(const ChargeDensity& cd)
   vector<double> vext_read, vext_read_loc;
 
   tm_read_vext.start();
-  if ( io_ == "cube" )
+  if ( fmt_ == "cube" )
   {
     // read cube file, n_'s are determined by cube file
     if ( myrow == 0 )
@@ -89,7 +89,7 @@ void ExternalPotential::update(const ChargeDensity& cd)
     }
     MPI_Bcast(&n_[0],3,MPI_INT,0,vcomm);
   }
-  else if (io_ == "xml")
+  else if ( fmt_ == "xml" )
   {
     if (myrow == 0)
     {

src/ExternalPotential.h

@@ -39,15 +39,15 @@ class ExternalPotential
   double amplitude_;       // overall scaling factor of external potential
   vector<double> vext_r_;  // vext in real space
   std::string filename_;   // file name for external potential
-  std::string io_;          // "cube", "base64_serial" or "base64_parallel"
+  std::string fmt_;        // file format: "cube" or "xml"
 
   public:
 
-  ExternalPotential(Sample& s, std::string name, std::string io="xml"):
+  ExternalPotential(Sample& s, std::string name, std::string fmt="xml"):
     s_(s), filename_(name), ecut_(0.0), amplitude_(1.0), magnitude_(0.0),
-    io_(io)
+    fmt_(fmt)
   {
-    assert( io_ == "cube" || io == "xml" );
+    assert( fmt_ == "cube" || fmt_ == "xml" );
   }
   ~ExternalPotential() {}