1 /* Convert file size to number of blocks on System V-like machines.
2 Copyright (C) 1990 Free Software Foundation, Inc.
4 This program is free software; you can redistribute it and/or modify
5 it under the terms of the GNU General Public License as published by
6 the Free Software Foundation; either version 2, or (at your option)
9 This program is distributed in the hope that it will be useful,
10 but WITHOUT ANY WARRANTY; without even the implied warranty of
11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 GNU General Public License for more details.
14 You should have received a copy of the GNU General Public License
15 along with this program; if not, write to the Free Software Foundation,
16 Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
18 /* Written by Brian L. Matthews, blm@6sceng.UUCP. */
24 #if !defined (HAVE_ST_BLOCKS) && !defined(_POSIX_VERSION)
25 # include <sys/types.h>
26 # include <sys/param.h>
29 /* Some SysV's, like Irix, seem to lack these. Hope they're correct. */
30 /* Size of a indirect block, in bytes. */
35 /* Number of inode pointers per indirect block. */
36 # define NINDIR (BSIZE/sizeof(daddr_t))
39 /* Number of direct block addresses in an inode. */
42 /* Return the number of 512-byte blocks in a file of SIZE bytes. */
48 long datablks = (size + 512 - 1) / 512;
53 indrblks = (datablks - NDIR - 1) / NINDIR + 1;
55 if (datablks > NDIR + NINDIR)
57 indrblks += (datablks - NDIR - NINDIR - 1) / (NINDIR * NINDIR) + 1;
59 if (datablks > NDIR + NINDIR + NINDIR * NINDIR)
64 return datablks + indrblks;
67 /* This declaration is solely to ensure that after preprocessing
68 this file is never empty. */
69 extern int textutils_fileblocks_unused;