Add method to retrieve path and mode

Can be useful if one wants to open externally a file
but generate the name with PLUMED rules
and properly use backups/append.

src/tools/FileBase.cpp

@@ -103,10 +103,12 @@ bool FileBase::FileExist(const std::string& path){
   if(plumed){
     this->path=appendSuffix(path,plumed->getSuffix());
     ff=std::fopen(const_cast<char*>(this->path.c_str()),"r");
+    mode="r";
   }
   if(!ff){
     this->path=path;
     ff=std::fopen(const_cast<char*>(this->path.c_str()),"r");
+    mode="r";
   }
   if(ff) {do_exist=true; fclose(ff);}
   if(comm) comm->Barrier();

src/tools/FileBase.h

@@ -75,6 +75,8 @@ protected:
   bool err;
 /// path of the opened file
   std::string path;
+/// mode of the opened file
+  std::string mode;
 /// Set to true if you want flush to be heavy (close/reopen)
   bool heavyFlush;
 /// Append suffix.
@@ -111,8 +113,23 @@ public:
   bool FileExist(const std::string& path);
 /// Check if a file is open
   bool isOpen();
+/// Retrieve the path
+  std::string getPath()const;
+/// Retrieve the mode
+  std::string getMode()const;
 };
 
+inline
+std::string FileBase::getPath()const{
+  return path;
+}
+
+inline
+std::string FileBase::getMode()const{
+  return mode;
+}
+
+
 
 }
 

src/tools/OFile.cpp

@@ -287,6 +287,7 @@ OFile& OFile::open(const std::string&path){
   }
   if(checkRestart()){
      fp=std::fopen(const_cast<char*>(this->path.c_str()),"a");
+     mode="a";
      if(Tools::extension(this->path)=="gz"){
 #ifdef __PLUMED_HAS_ZLIB
        gzfp=(void*)gzopen(const_cast<char*>(this->path.c_str()),"a9");
@@ -298,6 +299,7 @@ OFile& OFile::open(const std::string&path){
      backupFile( backstring, this->path );
      if(comm)comm->Barrier();
      fp=std::fopen(const_cast<char*>(this->path.c_str()),"w");
+     mode="w";
      if(Tools::extension(this->path)=="gz"){
 #ifdef __PLUMED_HAS_ZLIB
        gzfp=(void*)gzopen(const_cast<char*>(this->path.c_str()),"w9");