1  /* Long integers, for GNU tar.
       2     Copyright 1999-2023 Free Software Foundation, Inc.
       3  
       4     This file is part of GNU tar.
       5  
       6     GNU tar is free software; you can redistribute it and/or modify
       7     it under the terms of the GNU General Public License as published by
       8     the Free Software Foundation; either version 3 of the License, or
       9     (at your option) any later version.
      10  
      11     GNU tar is distributed in the hope that it will be useful,
      12     but WITHOUT ANY WARRANTY; without even the implied warranty of
      13     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
      14     GNU General Public License for more details.
      15  
      16     You should have received a copy of the GNU General Public License
      17     along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
      18  
      19  /* Handle large integers for calculating big tape lengths and the
      20     like.  In practice, double precision does for now.  On the vast
      21     majority of machines, it counts up to 2**52 bytes without any loss
      22     of information, and counts up to 2**62 bytes if data are always
      23     blocked in 1 kB boundaries.  We'll need arbitrary precision
      24     arithmetic anyway once we get into the 2**64 range, so there's no
      25     point doing anything fancy before then.  */
      26  
      27  #define TARLONG_FORMAT "%.0f"
      28  typedef double tarlong;