games/trek/getcodi.c

   1 /*      $NetBSD: getcodi.c,v 1.5 2003/08/07 09:37:51 agc Exp $  */
   2
   3 /*
   4  * Copyright (c) 1980, 1993
   5  *      The Regents of the University of California.  All rights reserved.
   6  *
   7  * Redistribution and use in source and binary forms, with or without
   8  * modification, are permitted provided that the following conditions
   9  * are met:
  10  * 1. Redistributions of source code must retain the above copyright
  11  *    notice, this list of conditions and the following disclaimer.
  12  * 2. Redistributions in binary form must reproduce the above copyright
  13  *    notice, this list of conditions and the following disclaimer in the
  14  *    documentation and/or other materials provided with the distribution.
  15  * 3. Neither the name of the University nor the names of its contributors
  16  *    may be used to endorse or promote products derived from this software
  17  *    without specific prior written permission.
  18  *
  19  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  20  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  21  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  22  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  23  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  24  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  25  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  26  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  27  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  28  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  29  * SUCH DAMAGE.
  30  */
  31
  32 #include <sys/cdefs.h>
  33 #ifndef lint
  34 #if 0
  35 static char sccsid[] = "@(#)getcodi.c   8.1 (Berkeley) 5/31/93";
  36 #else
  37 __RCSID("$NetBSD: getcodi.c,v 1.5 2003/08/07 09:37:51 agc Exp $");
  38 #endif
  39 #endif /* not lint */
  40
  41 #include "getpar.h"
  42 #include "trek.h"
  43
  44 /*
  45 **  get course and distance
  46 **
  47 **      The user is asked for a course and distance.  This is used by
  48 **      move, impulse, and some of the computer functions.
  49 **
  50 **      The return value is zero for success, one for an invalid input
  51 **      (meaning to drop the request).
  52 */
  53
  54 int
  55 getcodi(int *co, double *di)
  56 {
  57
  58         *co = getintpar("Course");
  59
  60         /* course must be in the interval [0, 360] */
  61         if (*co < 0 || *co > 360)
  62                 return (1);
  63         *di = getfltpar("Distance");
  64
  65         /* distance must be in the interval [0, 15] */
  66         if (*di <= 0.0 || *di > 15.0)
  67                 return (1);
  68
  69         /* good return */
  70         return (0);
  71 }