| /* |
| GNU GO - the game of Go (Wei-Chi) |
| Version 1.1 last revised 3-1-89 |
| Copyright (C) Free Software Foundation, Inc. |
| written by Man L. Li |
| modified by Wayne Iba |
| documented by Bob Webber |
| */ |
| /* |
| This program is free software; you can redistribute it and/or modify |
| it under the terms of the GNU General Public License as published by |
| the Free Software Foundation - version 1. |
| |
| This program is distributed in the hope that it will be useful, |
| but WITHOUT ANY WARRANTY; without even the implied warranty of |
| MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| GNU General Public License in file COPYING for more details. |
| |
| You should have received a copy of the GNU General Public License |
| along with this program; if not, write to the Free Software |
| Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. |
| |
| Please report any bug/fix, modification, suggestion to |
| |
| mail address: Man L. Li |
| Dept. of Computer Science |
| University of Houston |
| 4800 Calhoun Road |
| Houston, TX 77004 |
| |
| e-mail address: manli@cs.uh.edu (Internet) |
| coscgbn@uhvax1.bitnet (BITNET) |
| 70070,404 (CompuServe) |
| */ |
| |
| #include <stdio.h> |
| |
| #define EMPTY 0 |
| |
| extern unsigned char p[19][19], l[19][19]; |
| extern int mymove; |
| extern int mik, mjk, uik, ujk, mk, uk; /* piece captured */ |
| |
| extern void eval(int color); |
| |
| void examboard(int color) |
| /* examine pieces */ |
| { |
| int i, j, n; |
| |
| |
| /* find liberty of each piece */ |
| eval(color); |
| |
| /* initialize piece captured */ |
| if (color == mymove) |
| { |
| mik = -1; |
| mjk = -1; |
| } |
| else |
| { |
| uik = -1; |
| ujk = -1; |
| } |
| n = 0; /* The number of captures this move for Ko purposes */ |
| |
| /* remove all piece of zero liberty */ |
| for (i = 0; i < 19; i++) |
| for (j = 0; j < 19; j++) |
| if ((p[i][j] == color) && (l[i][j] == 0)) |
| { |
| p[i][j] = EMPTY; |
| /* record piece captured */ |
| if (color == mymove) |
| { |
| mik = i; |
| mjk = j; |
| ++mk; |
| } |
| else |
| { |
| uik = i; |
| ujk = j; |
| ++uk; |
| } |
| ++n; /* increment number of captures on this move */ |
| } |
| /* reset to -1 if more than one stone captured since no Ko possible */ |
| if (color == mymove && n > 1) |
| { |
| mik = -1; |
| mjk = -1; |
| } |
| else if ( n > 1 ) |
| { |
| uik = -1; |
| ujk = -1; |
| } |
| } /* end examboard */ |
| |
