arith.h

gnu tar 源码包。 tar 软件是 Unix 系统下的一个打包软件

/* Long integers, for GNU tar.
   Copyright 1999, 2007 Free Software Foundation, Inc.

   This program is free software; you can redistribute it and/or modify
   it under the terms of the GNU General Public License as published by
   the Free Software Foundation; either version 3, or (at your option)
   any later version.

   This program is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   GNU General Public License for more details.

   You should have received a copy of the GNU General Public License
   along with this program; if not, write to the Free Software Foundation,
   Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.  */

/* Handle large integers for calculating big tape lengths and the
   like.  In practice, double precision does for now.  On the vast
   majority of machines, it counts up to 2**52 bytes without any loss
   of information, and counts up to 2**62 bytes if data are always
   blocked in 1 kB boundaries.  We'll need arbitrary precision
   arithmetic anyway once we get into the 2**64 range, so there's no
   point doing anything fancy before then.  */
   
#define TARLONG_FORMAT "%.0f"
typedef double tarlong;