1 static char sccsid[] = "	odds.c	4.1	82/05/11	";
2 
3 #include "back.h"
4 
5 odds (r1,r2,val)
6 register int	r1;
7 int		r2, val;
8 {
9 	register int	i, j;
10 
11 	if (r1 == 0)  {
12 		for (i = 0; i < 6; i++)
13 			for (j = 0; j < 6; j++)
14 				table[i][j] = 0;
15 		return;
16 	} else  {
17 		r1--;
18 		if (r2-- == 0)
19 			for (i = 0; i < 6; i++)  {
20 				table[i][r1] += val;
21 				table[r1][i] += val;
22 			}
23 		else  {
24 			table[r2][r1] += val;
25 			table[r1][r2] += val;
26 		}
27 	}
28 }
29 
30 count ()  {
31 	register int	i;
32 	register int	j;
33 	register int	total;
34 
35 	total = 0;
36 	for (i = 0; i < 6; i++)
37 		for (j = 0; j < 6; j++)
38 			total += table[i][j];
39 	return (total);
40 }
41 
42 canhit (i,c)
43 int	i, c;
44 
45 {
46 	register int	j, k, b;
47 	int		a, d, diff, place, addon, menstuck;
48 
49 	if (c == 0)
50 		odds (0,0,0);
51 	if (board[i] > 0)  {
52 		a = -1;
53 		b = 25;
54 	} else  {
55 		a = 1;
56 		b = 0;
57 	}
58 	place = abs (25-b-i);
59 	menstuck = abs (board[b]);
60 	for (j = b; j != i; j += a)  {
61 		if (board[j]*a > 0)  {
62 			diff = abs(j-i);
63 			addon = place+((board[j]*a > 2 || j == b)? 5: 0);
64 			if ((j == b && menstuck == 1) &&
65 			    (j != b && menstuck == 0))
66 				for (k = 1; k < diff; k++)
67 					if (k < 7 && diff-k < 7 &&
68 					    (board[i+a*k]*a >= 0 ||
69 					    board[i+a*(diff-k)] >= 0))
70 						odds (k,diff-k,addon);
71 			if ((j == b || menstuck < 2) && diff < 7)
72 				odds (diff,0,addon);
73 		}
74 		if (j == b && menstuck > 1)
75 			break;
76 	}
77 	return (count());
78 }
79