Mercurial > hg > octave-jordi > gnulib-hg
annotate lib/fileblocks.c @ 439:a9015d648b2e
No longer include safe-l?stat.h.
| author | Jim Meyering <jim@meyering.net> |
|---|---|
| date | Fri, 19 May 1995 15:23:18 +0000 |
| parents | f9fa66a3a613 |
| children | 89a4657bb64a |
| rev | line source |
|---|---|
| 5 | 1 /* Convert file size to number of blocks on System V-like machines. |
| 2 Copyright (C) 1990 Free Software Foundation, Inc. | |
| 3 | |
| 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) | |
| 7 any later version. | |
| 8 | |
| 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. | |
| 13 | |
| 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 | |
| 16 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */ | |
| 17 | |
| 18 /* Written by Brian L. Matthews, blm@6sceng.UUCP. */ | |
| 19 | |
|
163
4aeea06507af
[!NINDIR]: Define BSIZE only if it's not already defined.
Jim Meyering <jim@meyering.net>
parents:
5
diff
changeset
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20 #ifdef HAVE_CONFIG_H |
|
4aeea06507af
[!NINDIR]: Define BSIZE only if it's not already defined.
Jim Meyering <jim@meyering.net>
parents:
5
diff
changeset
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21 #include <config.h> |
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4aeea06507af
[!NINDIR]: Define BSIZE only if it's not already defined.
Jim Meyering <jim@meyering.net>
parents:
5
diff
changeset
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22 #endif |
|
4aeea06507af
[!NINDIR]: Define BSIZE only if it's not already defined.
Jim Meyering <jim@meyering.net>
parents:
5
diff
changeset
|
23 |
| 5 | 24 #if !defined (HAVE_ST_BLOCKS) && !defined(_POSIX_SOURCE) |
| 25 #include <sys/types.h> | |
| 26 #include <sys/param.h> | |
| 27 | |
| 28 #ifndef NINDIR | |
| 29 /* Some SysV's, like Irix, seem to lack these. Hope they're correct. */ | |
| 30 /* Size of a indirect block, in bytes. */ | |
|
163
4aeea06507af
[!NINDIR]: Define BSIZE only if it's not already defined.
Jim Meyering <jim@meyering.net>
parents:
5
diff
changeset
|
31 #ifndef BSIZE |
| 5 | 32 #define BSIZE 1024 |
|
163
4aeea06507af
[!NINDIR]: Define BSIZE only if it's not already defined.
Jim Meyering <jim@meyering.net>
parents:
5
diff
changeset
|
33 #endif |
| 5 | 34 |
| 35 /* Number of inode pointers per indirect block. */ | |
| 36 #define NINDIR (BSIZE/sizeof(daddr_t)) | |
| 37 #endif /* !NINDIR */ | |
| 38 | |
| 39 /* Number of direct block addresses in an inode. */ | |
| 40 #define NDIR 10 | |
| 41 | |
| 42 /* Return the number of 512-byte blocks in a file of SIZE bytes. */ | |
| 43 | |
| 44 long | |
| 45 st_blocks (size) | |
| 46 long size; | |
| 47 { | |
| 48 long datablks = (size + 512 - 1) / 512; | |
| 49 long indrblks = 0; | |
| 50 | |
| 51 if (datablks > NDIR) | |
| 52 { | |
| 53 indrblks = (datablks - NDIR - 1) / NINDIR + 1; | |
| 54 | |
| 55 if (datablks > NDIR + NINDIR) | |
| 56 { | |
| 57 indrblks += (datablks - NDIR - NINDIR - 1) / (NINDIR * NINDIR) + 1; | |
| 58 | |
| 59 if (datablks > NDIR + NINDIR + NINDIR * NINDIR) | |
| 60 indrblks++; | |
| 61 } | |
| 62 } | |
| 63 | |
| 64 return datablks + indrblks; | |
| 65 } | |
| 66 #endif |