DbmFileLocater.cxx

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// DbmFileLocater                                                     //
//                                                                    //
// Package: Dbm (Database Maintenance).                               //
//                                                                    //
// N. West 08/2001                                                    //
//                                                                    //
// Concept: Utility to locate files in SRT private and public         //
//          directories.                                              //
//                                                                    //
// Purpose: Aid access to utility files used by Dbm                   //
//                                                                    //

#include <fstream>

#include "TSystem.h"

#include "DatabaseMaintenance/DbmFileLocater.h"
#include "LeakChecker/Lea.h"
#include "MessageService/MsgService.h"

using namespace std;

ClassImp(DbmFileLocater)


//   Definition of static data members
//   *********************************

CVSID("$Id: DbmFileLocater.cxx,v 1.3 2003/05/07 07:34:58 west Exp $");

// Definition of member functions (alphabetical order)
// ***************************************************


//.....................................................................

DbmFileLocater::DbmFileLocater()
{
//
//
//  Purpose:  Default constructor
//
//  Arguments:  None.
//
//  Return:    n/a
//
//  Contact:   N. West
//
//  Specification:-
//  =============
//
//  o  Create a DbmFileLocater.


//  Program Notes:-
//  =============

//  None.

  LEA_CTOR    //Leak Checker

  MSG("Dbm", Msg::kVerbose) << "Creating DbmFileLocater" << endl;
  
  
// Put current directory first in list.
  fDirectories.push_back(".");

// Look up SRT private and public names and add them if defined.
  const char* str = gSystem->Getenv("SRT_PRIVATE_CONTEXT");
  if ( str ) fDirectories.push_back(str);
  str = gSystem->Getenv("SRT_PUBLIC_CONTEXT");
  if ( str ) fDirectories.push_back(str);

}

//.....................................................................

DbmFileLocater::~DbmFileLocater() {
//
//
//  Purpose: Destructor
//
//  Arguments: 
//    None.
//
//  Return:    n/a
//
//  Contact:   N. West
//
//  Specification:-
//  =============
//
//  o  Destroy DbmFileLocater.


//  Program Notes:-
//  =============

//  None.

  LEA_DTOR    //Leak Checker

  MSG("Dbm", Msg::kVerbose) << "Destroying DbmFileLocater" << endl;

}

//.....................................................................

string DbmFileLocater::Find(const string& fileName) const {
//
//
//  Purpose: Attempt to find file in set of directories. 
//
//  Arguments: 
//    fileName  in    File name, possibly with relative directory
//                    e.g. DatabaseMaintenance/doc/Help.txt
//
//  Return:  Full ressolved file name or "" if not found.
//
//  Contact:   N. West
//
//  Specification:-
//  =============
//
//  o Search in order through fDirectories, appending each in turn
//   for required file. 

//  Program Notes:-
//  =============

//  None.

  for (list<string>::const_iterator itr = fDirectories.begin();
       itr != fDirectories.end();
       ++itr) {
    string fName =  *itr + "/" + fileName;
    ifstream test(fName.c_str());
    if ( test.is_open() ) return fName;
  }

  MSG("Dbm",Msg::kInfo) << "Cannot find file " << fileName << endl;
  return "";

}

/*    Template for New Member Function

//.....................................................................

DbmFileLocater:: {
//
//
//  Purpose:  
//
//  Arguments: 
//    xxxxxxxxx    in    yyyyyy
//
//  Return:    
//
//  Contact:   N. West
//
//  Specification:-
//  =============
//
//  o 

//  Program Notes:-
//  =============

//  None.


}

*/

---