/* $OpenBSD: odds.c,v 1.2 1998/03/19 11:13:22 pjanzen Exp $ */ /* * Copyright (c) 1980, 1993 * The Regents of the University of California. All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * 3. All advertising materials mentioning features or use of this software * must display the following acknowledgement: * This product includes software developed by the University of * California, Berkeley and its contributors. * 4. Neither the name of the University nor the names of its contributors * may be used to endorse or promote products derived from this software * without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. */ #ifndef lint #if 0 static char sccsid[] = "@(#)odds.c 8.1 (Berkeley) 5/31/93"; #else static char rcsid[] = "$OpenBSD: odds.c,v 1.2 1998/03/19 11:13:22 pjanzen Exp $"; #endif #endif /* not lint */ #include "back.h" void odds(r1, r2, val) int r1, r2, val; { int i, j; if (r1 == 0) { for (i = 0; i < 6; i++) for (j = 0; j < 6; j++) table[i][j] = 0; return; } else { r1--; if (r2-- == 0) { for (i = 0; i < 6; i++) { table[i][r1] += val; table[r1][i] += val; } } else { table[r2][r1] += val; table[r1][r2] += val; } } } int count() { int i, j, total; total = 0; for (i = 0; i < 6; i++) for (j = 0; j < 6; j++) total += table[i][j]; return(total); } int canhit(i, c) int i, c; { int j, k, b; int a, diff, place, addon, menstuck; if (c == 0) odds(0, 0, 0); if (board[i] > 0) { a = -1; b = 25; } else { a = 1; b = 0; } place = abs(25 - b - i); menstuck = abs(board[b]); for (j = b; j != i; j += a) { if (board[j] * a > 0) { diff = abs(j - i); addon = place + ((board[j] * a > 2 || j == b) ? 5 : 0); if ((j == b && menstuck == 1) && (j != b && menstuck == 0)) for (k = 1; k < diff; k++) if (k < 7 && diff - k < 7 && (board[i + a * k] * a >= 0 || board[i + a * (diff - k)] >= 0)) odds(k, diff - k, addon); if ((j == b || menstuck < 2) && diff < 7) odds(diff, 0, addon); } if (j == b && menstuck > 1) break; } return(count()); }