src/arith.h

   1 /* Long integers, for GNU tar.
   2    Copyright 1999-2024 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;