projects / unix-history / blame
| Commit | Line | Data |
|---|---|---|
| 7d1a081c KM |
1 | /* |
| 2 | * Copyright (c) 1980 Regents of the University of California. | |
| 4cd7a139 KB |
3 | * All rights reserved. |
| 4 | * | |
| 5 | * Redistribution and use in source and binary forms are permitted | |
| b7647a4b 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. | |
| 7d1a081c KM |
16 | */ |
| 17 | ||
| 18 | #ifndef lint | |
| b7647a4b | 19 | static char sccsid[] = "@(#)rnd_pos.c 5.3 (Berkeley) %G%"; |
| 4cd7a139 | 20 | #endif /* not lint */ |
| 7d1a081c KM |
21 | |
| 22 | # include "robots.h" | |
| 23 | ||
| 24 | # define IS_SAME(p,y,x) ((p).y != -1 && (p).y == y && (p).x == x) | |
| 25 | ||
| 26 | /* | |
| 27 | * rnd_pos: | |
| 28 | * Pick a random, unoccupied position | |
| 29 | */ | |
| 30 | COORD * | |
| 31 | rnd_pos() | |
| 32 | { | |
| 33 | static COORD pos; | |
| 34 | static int call = 0; | |
| 35 | register int i = 0; | |
| 36 | ||
| 37 | do { | |
| 38 | pos.y = rnd(Y_FIELDSIZE - 1) + 1; | |
| 39 | pos.x = rnd(X_FIELDSIZE - 1) + 1; | |
| 40 | refresh(); | |
| 41 | } while (Field[pos.y][pos.x] != 0); | |
| 42 | call++; | |
| 43 | return &pos; | |
| 44 | } | |
| 45 | ||
| 46 | rnd(range) | |
| 47 | int range; | |
| 48 | { | |
| 49 | unsigned int rand(); | |
| 50 | ||
| 51 | return rand() % range; | |
| 52 | } |