Return the range size between the buffer current position and a outside stored given position that is previous to the current.

Parameters:

prevpos

the given position.

Returns:

the range size.

Definition at line 211 of file Buffer.H.

    {
      if(prevpos <= currentpos)
      {
      return currentpos - prevpos;
      }
      else
      {
      return currentpos + size - prevpos;
      }
    }