Mercurial > hg > octave-lojdl > gnulib-hg
annotate lib/fileblocks.c @ 933:6c3fbfcdb059
[HAVE_UNISTD_H]: Include unistd.h.
John Gatewood Ham reported that this is necessary for DJGPP/Win95.
| author | Jim Meyering <jim@meyering.net> |
|---|---|
| date | Tue, 03 Jun 1997 20:01:47 +0000 |
| parents | b4ef1c1a0171 |
| children | b2ed35578119 |
| rev | line source |
|---|---|
| 5 | 1 /* Convert file size to number of blocks on System V-like machines. |
|
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[HAVE_UNISTD_H]: Include unistd.h.
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parents:
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2 Copyright (C) 1990, 1997 Free Software Foundation, Inc. |
| 5 | 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 | |
|
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15 along with this program; if not, write to the Free Software Foundation, |
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16 Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ |
| 5 | 17 |
| 18 /* Written by Brian L. Matthews, blm@6sceng.UUCP. */ | |
| 19 | |
|
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20 #ifdef HAVE_CONFIG_H |
| 599 | 21 # include <config.h> |
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22 #endif |
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[!NINDIR]: Define BSIZE only if it's not already defined.
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parents:
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23 |
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24 #if !defined (HAVE_ST_BLOCKS) && !defined(_POSIX_VERSION) |
| 599 | 25 # include <sys/types.h> |
| 26 # include <sys/param.h> | |
| 5 | 27 |
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[HAVE_UNISTD_H]: Include unistd.h.
Jim Meyering <jim@meyering.net>
parents:
650
diff
changeset
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28 # if HAVE_UNISTD_H |
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6c3fbfcdb059
[HAVE_UNISTD_H]: Include unistd.h.
Jim Meyering <jim@meyering.net>
parents:
650
diff
changeset
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29 # include <unistd.h> |
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6c3fbfcdb059
[HAVE_UNISTD_H]: Include unistd.h.
Jim Meyering <jim@meyering.net>
parents:
650
diff
changeset
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30 # endif |
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6c3fbfcdb059
[HAVE_UNISTD_H]: Include unistd.h.
Jim Meyering <jim@meyering.net>
parents:
650
diff
changeset
|
31 |
| 599 | 32 # ifndef NINDIR |
| 5 | 33 /* Some SysV's, like Irix, seem to lack these. Hope they're correct. */ |
| 34 /* Size of a indirect block, in bytes. */ | |
| 599 | 35 # ifndef BSIZE |
| 36 # define BSIZE 1024 | |
| 37 # endif | |
| 5 | 38 |
| 39 /* Number of inode pointers per indirect block. */ | |
| 599 | 40 # define NINDIR (BSIZE/sizeof(daddr_t)) |
| 41 # endif /* !NINDIR */ | |
| 5 | 42 |
| 43 /* Number of direct block addresses in an inode. */ | |
| 599 | 44 # define NDIR 10 |
| 5 | 45 |
| 46 /* Return the number of 512-byte blocks in a file of SIZE bytes. */ | |
| 47 | |
| 48 long | |
| 49 st_blocks (size) | |
| 50 long size; | |
| 51 { | |
| 52 long datablks = (size + 512 - 1) / 512; | |
| 53 long indrblks = 0; | |
| 54 | |
| 55 if (datablks > NDIR) | |
| 56 { | |
| 57 indrblks = (datablks - NDIR - 1) / NINDIR + 1; | |
| 58 | |
| 59 if (datablks > NDIR + NINDIR) | |
| 60 { | |
| 61 indrblks += (datablks - NDIR - NINDIR - 1) / (NINDIR * NINDIR) + 1; | |
| 62 | |
| 63 if (datablks > NDIR + NINDIR + NINDIR * NINDIR) | |
| 64 indrblks++; | |
| 65 } | |
| 66 } | |
| 67 | |
| 68 return datablks + indrblks; | |
| 69 } | |
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70 #else |
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71 /* This declaration is solely to ensure that after preprocessing |
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72 this file is never empty. */ |
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73 extern int textutils_fileblocks_unused; |
| 5 | 74 #endif |