+
−/* Convert file size to number of blocks on System V-like machines.
+
−
+
−   Copyright (C) 1990, 1997-1999, 2004-2006, 2009-2012 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 of the License, 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, see <http://www.gnu.org/licenses/>.  */
+
−
+
−/* Written by Brian L. Matthews, blm@6sceng.UUCP. */
+
−
+
−#include <config.h>
+
−
+
−#include <sys/types.h>
+
−
+
−#if HAVE_SYS_PARAM_H
+
−# include <sys/param.h>
+
−#endif
+
−
+
−#if !HAVE_STRUCT_STAT_ST_BLOCKS && !defined _POSIX_SOURCE && defined BSIZE
+
−
+
−# include <unistd.h>
+
−
+
−# ifndef NINDIR
+
−
+
−#  if defined __DJGPP__
+
−typedef long daddr_t; /* for disk address */
+
−#  endif
+
−
+
−/* Some SysV's, like Irix, seem to lack this.  Hope it's correct. */
+
−/* Number of inode pointers per indirect block. */
+
−#  define NINDIR (BSIZE / sizeof (daddr_t))
+
−# endif /* !NINDIR */
+
−
+
−/* Number of direct block addresses in an inode. */
+
−# define NDIR   10
+
−
+
−/* Return the number of 512-byte blocks in a file of SIZE bytes. */
+
−
+
−off_t
+
−st_blocks (off_t size)
+
−{
+
−  off_t datablks = size / 512 + (size % 512 != 0);
+
−  off_t indrblks = 0;
+
−
+
−  if (datablks > NDIR)
+
−    {
+
−      indrblks = (datablks - NDIR - 1) / NINDIR + 1;
+
−
+
−      if (datablks > NDIR + NINDIR)
+
−        {
+
−          indrblks += (datablks - NDIR - NINDIR - 1) / (NINDIR * NINDIR) + 1;
+
−
+
−          if (datablks > NDIR + NINDIR + NINDIR * NINDIR)
+
−            indrblks++;
+
−        }
+
−    }
+
−
+
−  return datablks + indrblks;
+
−}
+
−#else
+
−/* This declaration is solely to ensure that after preprocessing
+
−   this file is never empty.  */
+
−typedef int textutils_fileblocks_unused;
+
−#endif