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Annotation of 43BSDReno/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: (1) source distributions retain this entire copyright
                      7:  * notice and comment, and (2) distributions including binaries display
                      8:  * the following acknowledgement:  ``This product includes software
                      9:  * developed by the University of California, Berkeley and its contributors''
                     10:  * in the documentation or other materials provided with the distribution
                     11:  * and in all advertising materials mentioning features or use of this
                     12:  * software. Neither the name of the University nor the names of its
                     13:  * contributors may be used to endorse or promote products derived
                     14:  * from this software without specific prior written permission.
                     15:  * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
                     16:  * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
                     17:  * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
                     18:  */
                     19: 
                     20: #ifndef lint
                     21: static char sccsid[] = "@(#)rnd_pos.c  5.4 (Berkeley) 6/1/90";
                     22: #endif /* not lint */
                     23: 
                     24: # include      "robots.h"
                     25: 
                     26: # define       IS_SAME(p,y,x)  ((p).y != -1 && (p).y == y && (p).x == x)
                     27: 
                     28: /*
                     29:  * rnd_pos:
                     30:  *     Pick a random, unoccupied position
                     31:  */
                     32: COORD *
                     33: rnd_pos()
                     34: {
                     35:        static COORD    pos;
                     36:        static int      call = 0;
                     37:        register int    i = 0;
                     38: 
                     39:        do {
                     40:                pos.y = rnd(Y_FIELDSIZE - 1) + 1;
                     41:                pos.x = rnd(X_FIELDSIZE - 1) + 1;
                     42:                refresh();
                     43:        } while (Field[pos.y][pos.x] != 0);
                     44:        call++;
                     45:        return &pos;
                     46: }
                     47: 
                     48: rnd(range)
                     49: int    range;
                     50: {
                     51:        unsigned int    rand();
                     52: 
                     53:        return rand() % range;
                     54: }

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