home *** CD-ROM | disk | FTP | other *** search
- /*
- 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
- NeXT version by John Neil
- */
- /*
- 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)
-
- For the NeXT version, please report any bug/fix, modification, suggestion to
-
- mail address: John Neil
- Mathematics Department
- Portland State University
- PO Box 751
- Portland, OR 97207
-
- e-mail address: neil@math.mth.pdx.edu (Internet)
- neil@psuorvm.bitnet (BITNET)
- */
-
- #define EMPTY 0
- #define BLACKSTONE 2
-
- extern unsigned char p[19][19], l[19][19];
- extern int MAXX, MAXY;
- extern int currentStone, opposingStone, whiteCaptured, blackCaptured;
- extern int whiteCapturedKoI, whiteCapturedKoJ, blackCapturedKoI, blackCapturedKoJ;
- 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 == BLACKSTONE)
- {
- blackCapturedKoI = -1;
- blackCapturedKoJ = -1;
- }
- else
- {
- whiteCapturedKoI = -1;
- whiteCapturedKoJ = -1;
- }
- n = 0; /* The number of captures this move for Ko purposes */
-
- /* remove all piece of zero liberty */
- for (i = 0; i < MAXX; i++)
- for (j = 0; j < MAXY; j++)
- if ((p[i][j] == color) && (l[i][j] == 0))
- {
- p[i][j] = EMPTY;
- /* record piece captured */
- if (color == BLACKSTONE)
- {
- blackCapturedKoI = i;
- blackCapturedKoJ = j;
- ++blackCaptured;
- }
- else
- {
- whiteCapturedKoI = i;
- whiteCapturedKoJ = j;
- ++whiteCaptured;
- }
- ++n; /* increment number of captures on this move */
- }
- /* reset to -1 if more than one stone captured since no Ko possible */
- if ((color == BLACKSTONE) && (n > 1))
- {
- blackCapturedKoI = -1;
- blackCapturedKoJ = -1;
- }
- else if ( n > 1 )
- {
- whiteCapturedKoI = -1;
- whiteCapturedKoJ = -1;
- }
- } /* end examboard */
-
-