1 /* Long integers, for GNU tar. 2 Copyright 1999-2021 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; 29