Function MakeUniquePath

Engine/source/core/volume.cpp:1259–1299

}

String MakeUniquePath( const char *path, const char *fileName, const char *ext )
{
   Path filePath;

   filePath.setPath( path );
   filePath.setFileName( fileName );
   filePath.setExtension( ext );

   // First get an upper bound on the range of filenames to search. This lets us
   // quickly skip past a large number of existing filenames.
   // Note: upper limit of 2^31 added to handle the degenerate case of a folder
   // with files named using the powers of 2, but plenty of space in between!
   U32 high = 1;
   while ( IsFile( filePath ) && ( high < 0x80000000 ) )
   {
      high = high * 2;
      filePath.setFileName( String::ToString( "%s%d", fileName, high ) );
   }

   // Now perform binary search for first filename in the range that doesn't exist
   // Note that the returned name will not be strictly numerically *first* if the
   // existing filenames are non-sequential (eg. 4,6,7), but it will still be unique.
   if ( high > 1 )
   {
      U32 low = high / 2;
      while ( high - low > 1 )
      {
         U32 probe = low + ( high - low ) / 2;
         filePath.setFileName( String::ToString( "%s%d", fileName, probe ) );
         if ( IsFile( filePath ) )
            low = probe;
         else
            high = probe;
      }

      // The 'high' index is guaranteed not to exist
      filePath.setFileName( String::ToString( "%s%d", fileName, high ) );
   }

   return filePath.getFullPath();
}

void  StartFileChangeNotifications() { sgMountSystem.startFileChangeNotifications(); }
void  StopFileChangeNotifications() { sgMountSystem.stopFileChangeNotifications(); }