]>
Commit | Line | Data |
---|---|---|
81fea2b1 JL |
1 | /* Copyright (C) 1995 Free Software Foundation, Inc. |
2 | This file is part of GNU Fortran libU77 library. | |
3 | ||
4 | This library is free software; you can redistribute it and/or modify it | |
5 | under the terms of the GNU Library General Public License as published | |
6 | by the Free Software Foundation; either version 2 of the License, or | |
7 | (at your option) any later version. | |
8 | ||
9 | GNU Fortran 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 GNU | |
12 | Library General Public License for more details. | |
13 | ||
14 | You should have received a copy of the GNU Library General Public | |
15 | License along with GNU Fortran; see the file COPYING.LIB. If | |
16 | not, write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330, | |
17 | Boston, MA 02111-1307, USA. */ | |
18 | ||
19 | #ifdef HAVE_CONFIG_H | |
20 | #include "config.h" | |
21 | #endif | |
22 | #if HAVE_STDLIB_H | |
23 | # include <stdlib.h> | |
24 | #endif | |
25 | #include "f2c.h" | |
26 | #ifndef RAND_MAX | |
27 | # define RAND_MAX 2147483647 /* from SunOS */ | |
28 | #endif | |
29 | ||
30 | /* We could presumably do much better than the traditional libc | |
31 | version, though at least the glibc one is reasonable, it seems. | |
32 | For the sake of the innocent, I'm not sure we should really do | |
33 | this... */ | |
34 | ||
35 | /* Note this is per SunOS -- other s may have no arg. */ | |
36 | ||
37 | #ifdef KR_headers | |
38 | double G77_rand_0 (flag) | |
39 | integer *flag; | |
40 | #else | |
41 | double G77_rand_0 (integer *flag) | |
42 | #endif | |
43 | { | |
44 | switch (*flag) { | |
45 | case 0: | |
46 | break; | |
47 | case 1: | |
48 | srand (0); /* Arbitrary choice of initialiser. */ | |
49 | break; | |
50 | default: | |
51 | srand (*flag); | |
52 | } | |
53 | return (float) rand () / RAND_MAX; | |
54 | } |