source: branches/trigger_burst_research/Archive/correctFileName.cxx

#include <string>
#include <iostream>

using namespace std;

bool isNumber(char c)
{
        switch (c) {
        case '0':
        case '1':
        case '2':
        case '3':
        case '4':
        case '5':
        case '6':
        case '7':
        case '8':
        case '9':
                return true;
                break;
        default:
                return false;
        };
}

int  main(int argc, char** argv)
{
        if (argc != 2)
                return 0;
        
        string c(argv[1]);
        
        //get the year, month and day from the path.
        string year, month, day;
        string runnumber;
        string serviceName;
        int count = c.size()-5;
        
        while (count >= 0)
        {
                if (c[count+0] == '2' &&
                    c[count+1] == '0' &&
                    c[count+2] == '1' &&
                    c[count+3] == '1' &&
                    c[count+4] == '/')
                    {
                        year = "2011";
                        month = c.substr(count+5, 2);
                        day = c.substr(count+8, 2);
                        break;
                    }
                 count--;
        }
        
        //separate the runnumber from the rest of the filename
        count = c.size()-6;
        while (count >= 0)
        {
                if (c[count] == '_')
                {
                        if (isNumber(c[count+1]) &&
                            isNumber(c[count+2]) &&
                            isNumber(c[count+3]))
                            {
                                runnumber=c.substr(count+1, 3);
                                break;
                            }
                }
                else
                {
                        if (c[count+0] != '0' && 
                            c[count+1] == '0' &&
                            c[count+2] == '0' &&
                            c[count+3] == '0' &&
                            c[count+4] == '0' &&
                            c[count+5] == '0')
                            {
                                runnumber=c.substr(count+6, 3);
                                break;
                            }
                }
                count--;
        }       
        
        //figure out the service name
        count = c.size()-3;
        while (count > 0)
        {
                if ((c[count] == '_' || c[count] == '.') &&
                    !isNumber(c[count+1]) &&
                    isNumber(c[count-1]))
                {
                        serviceName = c.substr(count+1, c.size()-(count+6));
                }
                count--;
        }
        if (serviceName == "fits")
                serviceName = "";
        
        
        cout << year << month << day;
        if (runnumber != "") cout << "_";
        cout << runnumber;
        if (serviceName != "") cout << ".";
        cout << serviceName << ".fits";
//      cout << "year: " << year << " month: " << month << " day: " << day << endl;
//      cout << "run number: " << runnumber << " service name: " << serviceName << endl;

return 0;

}