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
34void
35getmove(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
79int
80movokay(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