/* $NetBSD: one.c,v 1.9 2012/10/13 19:19:39 dholland 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. 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. */ #include <sys/cdefs.h> #ifndef lint #if 0 static char sccsid[] = "@(#)one.c 8.1 (Berkeley) 5/31/93"; #else __RCSID("$NetBSD: one.c,v 1.9 2012/10/13 19:19:39 dholland Exp $"); #endif #endif /* not lint */ #include "back.h" static int checkd(struct move *, int); static int last(void); int makmove(struct move *mm, int i) { int n, d; int max; d = mm->d0; n = abs(mm->g[i] - mm->p[i]); max = (*offptr < 0 ? 7 : last()); if (board[mm->p[i]] * cturn <= 0) return (checkd(mm, d) + 2); if (mm->g[i] != home && board[mm->g[i]] * cturn < -1) return (checkd(mm, d) + 3); if (i || mm->D0 == mm->D1) { if (n == max ? mm->D1 < n : mm->D1 != n) return (checkd(mm, d) + 1); } else { if (n == max ? mm->D0 < n && mm->D1 < n : mm->D0 != n && mm->D1 != n) return (checkd(mm, d) + 1); if (n == max ? mm->D0 < n : mm->D0 != n) { if (mm->d0) return (checkd(mm, d) + 1); mswap(mm); } } if (mm->g[i] == home && *offptr < 0) return (checkd(mm, d) + 4); mm->h[i] = 0; board[mm->p[i]] -= cturn; if (mm->g[i] != home) { if (board[mm->g[i]] == -cturn) { board[home] -= cturn; board[mm->g[i]] = 0; mm->h[i] = 1; if (abs(bar - mm->g[i]) < 7) { (*inopp)--; if (*offopp >= 0) *offopp -= 15; } } board[mm->g[i]] += cturn; if (abs(home - mm->g[i]) < 7 && abs(home - mm->p[i]) > 6) { (*inptr)++; if (*inptr + *offptr == 0) *offptr += 15; } } else { (*offptr)++; (*inptr)--; } return (0); } void moverr(struct move *mm, int i) { int j; if (tflag) curmove(20, 0); else writec('\n'); writel("Error: "); for (j = 0; j <= i; j++) { wrint(mm->p[j]); writec('-'); wrint(mm->g[j]); if (j < i) writec(','); } writel("... "); movback(mm, i); } static int checkd(struct move *mm, int d) { if (mm->d0 != d) mswap(mm); return (0); } static int last(void) { int i; for (i = home - 6 * cturn; i != home; i += cturn) if (board[i] * cturn > 0) return (abs(home - i)); return (-1); } void movback(struct move *mm, int i) { int j; for (j = i - 1; j >= 0; j--) backone(mm, j); } void backone(struct move *mm, int i) { board[mm->p[i]] += cturn; if (mm->g[i] != home) { board[mm->g[i]] -= cturn; if (abs(mm->g[i] - home) < 7 && abs(mm->p[i] - home) > 6) { (*inptr)--; if (*inptr + *offptr < 15 && *offptr >= 0) *offptr -= 15; } } else { (*offptr)--; (*inptr)++; } if (mm->h[i]) { board[home] += cturn; board[mm->g[i]] = -cturn; if (abs(bar - mm->g[i]) < 7) { (*inopp)++; if (*inopp + *offopp == 0) *offopp += 15; } } }