games/trek/getcodi.c

   1 /*      @(#)getcodi.c   8.1 (Berkeley) 5/31/93                          */
   2 /*      $NetBSD: getcodi.c,v 1.6 2009/05/24 19:18:44 dholland Exp $     */
   3
   4 /*
   5  * Copyright (c) 1980, 1993
   6  *      The Regents of the University of California.  All rights reserved.
   7  *
   8  * Redistribution and use in source and binary forms, with or without
   9  * modification, are permitted provided that the following conditions
  10  * are met:
  11  * 1. Redistributions of source code must retain the above copyright
  12  *    notice, this list of conditions and the following disclaimer.
  13  * 2. Redistributions in binary form must reproduce the above copyright
  14  *    notice, this list of conditions and the following disclaimer in the
  15  *    documentation and/or other materials provided with the distribution.
  16  * 3. Neither the name of the University nor the names of its contributors
  17  *    may be used to endorse or promote products derived from this software
  18  *    without specific prior written permission.
  19  *
  20  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  21  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  22  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  23  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  24  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  25  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  26  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  27  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  28  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  29  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  30  * SUCH DAMAGE.
  31  */
  32
  33 #include "getpar.h"
  34 #include "trek.h"
  35
  36 /*
  37 **  get course and distance
  38 **
  39 **      The user is asked for a course and distance.  This is used by
  40 **      move, impulse, and some of the computer functions.
  41 **
  42 **      The return value is zero for success, one for an invalid input
  43 **      (meaning to drop the request).
  44 */
  45
  46 int
  47 getcodi(int *co, double *di)
  48 {
  49
  50         *co = getintpar("Course");
  51
  52         /* course must be in the interval [0, 360] */
  53         if (*co < 0 || *co > 360)
  54                 return (1);
  55         *di = getfltpar("Distance");
  56
  57         /* distance must be in the interval [0, 15] */
  58         if (*di <= 0.0 || *di > 15.0)
  59                 return (1);
  60
  61         /* good return */
  62         return (0);
  63 }