projects / unix-history / blame
| Commit | Line | Data |
|---|---|---|
| b6f0a7e4 DF |
1 | /* |
| 2 | * Copyright (c) 1980 Regents of the University of California. | |
| e9fb6bea KB |
3 | * All rights reserved. |
| 4 | * | |
| 5 | * Redistribution and use in source and binary forms are permitted | |
| d99e6414 KB |
6 | * provided that the above copyright notice and this paragraph are |
| 7 | * duplicated in all such forms and that any documentation, | |
| 8 | * advertising materials, and other materials related to such | |
| 9 | * distribution and use acknowledge that the software was developed | |
| 10 | * by the University of California, Berkeley. The name of the | |
| 11 | * University may not be used to endorse or promote products derived | |
| 12 | * from this software without specific prior written permission. | |
| 13 | * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR | |
| 14 | * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED | |
| 15 | * WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE. | |
| b6f0a7e4 DF |
16 | */ |
| 17 | ||
| db247e8f | 18 | #ifndef lint |
| ca67e7b4 | 19 | static char sccsid[] = "@(#)ranf.c 5.3 (Berkeley) 6/18/88"; |
| e9fb6bea | 20 | #endif /* not lint */ |
| db247e8f | 21 | |
| 06d69904 KL |
22 | # include <stdio.h> |
| 23 | ||
| db247e8f KM |
24 | ranf(max) |
| 25 | int max; | |
| 26 | { | |
| 27 | register int t; | |
| 28 | ||
| 29 | if (max <= 0) | |
| 30 | return (0); | |
| 31 | t = rand() >> 5; | |
| 32 | return (t % max); | |
| 33 | } | |
| 34 | ||
| 35 | ||
| 36 | double franf() | |
| 37 | { | |
| 38 | double t; | |
| 39 | t = rand() & 077777; | |
| 40 | return (t / 32767.0); | |
| 41 | } |