1 /*	$OpenBSD: check.c,v 1.7 2015/11/30 08:19:25 tb 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 "back.h"
33 
34 void
35 getmove(void)
36 {
37 	int     i, c;
38 
39 	c = 0;
40 	for (;;) {
41 		i = checkmove(c);
42 
43 		switch (i) {
44 		case -1:
45 			if (movokay(mvlim)) {
46 				move(20, 0);
47 				for (i = 0; i < mvlim; i++)
48 					if (h[i])
49 						wrhit(g[i]);
50 				nexturn();
51 				if (*offopp == 15)
52 					cturn *= -2;
53 				return;
54 			}
55 		case -4:
56 		case 0:
57 			refresh();
58 			if (i != 0 && i != -4)
59 				break;
60 			mvaddstr(20, 0, *Colorptr);
61 			if (i == -4)
62 				addstr(" must make ");
63 			else
64 				addstr(" can only make ");
65 			printw("%d move%s.\n", mvlim, mvlim > 1 ? "s":"");
66 			break;
67 
68 		case -3:
69 			if (quit())
70 				return;
71 		}
72 
73 		move(cturn == -1 ? 18 : 19, 39);
74 		clrtoeol();
75 		c = -1;
76 	}
77 }
78 
79 int
80 movokay(int mv)
81 {
82 	int     i, m;
83 
84 	if (d0)
85 		swap;
86 
87 	for (i = 0; i < mv; i++) {
88 		if (p[i] == g[i]) {
89 			moverr(i);
90 			mvaddstr(20, 0, "Attempt to move to same location.\n");
91 			return(0);
92 		}
93 		if (cturn * (g[i] - p[i]) < 0) {
94 			moverr(i);
95 			mvaddstr(20, 0, "Backwards move.\n");
96 			return(0);
97 		}
98 		if (abs(board[bar]) && p[i] != bar) {
99 			moverr(i);
100 			mvaddstr(20, 0, "Men still on bar.\n");
101 			return(0);
102 		}
103 		if ((m = makmove(i))) {
104 			moverr(i);
105 			switch (m) {
106 			case 1:
107 				addstr("Move not rolled.\n");
108 				break;
109 
110 			case 2:
111 				addstr("Bad starting position.\n");
112 				break;
113 
114 			case 3:
115 				addstr("Destination occupied.\n");
116 				break;
117 
118 			case 4:
119 				addstr("Can't remove men yet.\n");
120 			}
121 			return(0);
122 		}
123 	}
124 	return(1);
125 }
126