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- /* Convert file size to number of blocks on System V-like machines.
- Copyright (C) 1990 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 2, 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., 675 Mass Ave, Cambridge, MA 02139, USA. */
-
- /* Written by Brian L. Matthews, blm@6sceng.UUCP. */
-
- #if !defined (HAVE_ST_BLOCKS) && !defined(_POSIX_SOURCE)
- #include <sys/types.h>
- #include <sys/param.h>
-
- #ifndef NINDIR
- /* Some SysV's, like Irix, seem to lack these. Hope they're correct. */
- /* Size of a indirect block, in bytes. */
- #define BSIZE 1024
-
- /* 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. */
-
- long
- st_blocks (size)
- long size;
- {
- long datablks = (size + 512 - 1) / 512;
- long 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;
- }
- #endif
-