trek/getcodi.c

   1 /*      $NetBSD: getcodi.c,v 1.4 1997/10/12 21:24:49 christos 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. All advertising materials mentioning features or use of this software
  16  *    must display the following acknowledgement:
  17  *      This product includes software developed by the University of
  18  *      California, Berkeley and its contributors.
  19  * 4. Neither the name of the University nor the names of its contributors
  20  *    may be used to endorse or promote products derived from this software
  21  *    without specific prior written permission.
  22  *
  23  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  24  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  25  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  26  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  27  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  28  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  29  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  30  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  31  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  32  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  33  * SUCH DAMAGE.
  34  */
  35
  36 #include <sys/cdefs.h>
  37 #ifndef lint
  38 #if 0
  39 static char sccsid[] = "@(#)getcodi.c   8.1 (Berkeley) 5/31/93";
  40 #else
  41 __RCSID("$NetBSD: getcodi.c,v 1.4 1997/10/12 21:24:49 christos Exp $");
  42 #endif
  43 #endif /* not lint */
  44
  45 #include "getpar.h"
  46 #include "trek.h"
  47
  48 /*
  49 **  get course and distance
  50 **
  51 **      The user is asked for a course and distance.  This is used by
  52 **      move, impulse, and some of the computer functions.
  53 **
  54 **      The return value is zero for success, one for an invalid input
  55 **      (meaning to drop the request).
  56 */
  57
  58 int
  59 getcodi(co, di)
  60 int     *co;
  61 double  *di;
  62 {
  63
  64         *co = getintpar("Course");
  65
  66         /* course must be in the interval [0, 360] */
  67         if (*co < 0 || *co > 360)
  68                 return (1);
  69         *di = getfltpar("Distance");
  70
  71         /* distance must be in the interval [0, 15] */
  72         if (*di <= 0.0 || *di > 15.0)
  73                 return (1);
  74
  75         /* good return */
  76         return (0);
  77 }