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Annotation of 43BSDTahoe/games/robots/rnd_pos.c, revision 1.1.1.1

1.1       root        1: /*
                      2:  * Copyright (c) 1980 Regents of the University of California.
                      3:  * All rights reserved.
                      4:  *
                      5:  * Redistribution and use in source and binary forms are permitted
                      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.
                     16:  */
                     17: 
                     18: #ifndef lint
                     19: static char sccsid[] = "@(#)rnd_pos.c  5.3 (Berkeley) 6/18/88";
                     20: #endif /* not lint */
                     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: }

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