communicator.h

Go to the documentation of this file.

 
#ifndef COMMUNICATOR_H 
#define COMMUNICATOR_H
 
#include "common.h"
#include "constants.h"
#include <cstring>
#include <fstream>
 
 
// ========================================================================  
// File Class
// ========================================================================  
class File
{
    public:
    
        File(string, string, string, string);
        File(string);
        ~File() {close();}
 
        /* Return the file stream */
        fstream & stream() { 
            return rwfile;
        }
 
        /* Open the primary file */
        void open(ios_base::openmode);
 
        /* Reset and rename the primary file */
        void reset();
        void rename();
 
        /* Close the file if open */
        void close();       
 
        bool exists() {return exists_;}    
 
    protected:
        friend class Communicator;    // Friends for I/O
 
        string name;        // The File name
        string bakname;     // The backup name
 
        bool exists_;       // Does the file exist? Check on creation.
 
        fstream rwfile;     // The i/o file object
 
        /* An alternate open which takes a filename */
        void open(ios_base::openmode,string);
 
};
 
// ========================================================================  
// Communicator Class
// ========================================================================  
class Communicator
{
    public:
        static Communicator* getInstance();
 
        void init(double,bool,string,string);
 
        File *file(string type) {
            if (!file_.count(type))
                initFile(type);
            return &file_.at(type);
        }
 
        void updateNames();
 
    protected:
        Communicator() {}                                   
        Communicator(const Communicator&);              
        Communicator& operator= (const Communicator&);  
 
    private:
        ios_base::openmode mode;    // The file i/o mode
 
        string ensemble;            // The type of ensemble
        string dataName;            // The labelling scheme of the output files
        string header;              // A unique file header
 
        string initName;      // A possible initial file name
        string fixedName;     // A posible fixed file name
        string baseDir;       // The output base directory
 
        double tau;          // A local copy of the actual imaginary time step.
 
        boost::ptr_map<string,File> file_; // The file map
 
        /* Initialize a input/output file */
        void initFile(string);
};
 
 
/**************************************************************************/
inline Communicator* communicate() {
    Communicator *temp = Communicator::getInstance();
    return temp;
}
#endif