Module Name:    src
Committed By:   rillig
Date:           Sat May 28 08:32:56 UTC 2022

Modified Files:
        src/games/gomoku: bdinit.c bdisp.c gomoku.h makemove.c

Log Message:
gomoku: highlight the winning frame


To generate a diff of this commit:
cvs rdiff -u -r1.23 -r1.24 src/games/gomoku/bdinit.c
cvs rdiff -u -r1.48 -r1.49 src/games/gomoku/bdisp.c
cvs rdiff -u -r1.43 -r1.44 src/games/gomoku/gomoku.h
cvs rdiff -u -r1.32 -r1.33 src/games/gomoku/makemove.c

Please note that diffs are not public domain; they are subject to the
copyright notices on the relevant files.

Modified files:

Index: src/games/gomoku/bdinit.c
diff -u src/games/gomoku/bdinit.c:1.23 src/games/gomoku/bdinit.c:1.24
--- src/games/gomoku/bdinit.c:1.23	Sat May 28 08:19:18 2022
+++ src/games/gomoku/bdinit.c	Sat May 28 08:32:55 2022
@@ -1,4 +1,4 @@
-/*	$NetBSD: bdinit.c,v 1.23 2022/05/28 08:19:18 rillig Exp $	*/
+/*	$NetBSD: bdinit.c,v 1.24 2022/05/28 08:32:55 rillig Exp $	*/
 
 /*
  * Copyright (c) 1994
@@ -34,7 +34,7 @@
 
 #include <sys/cdefs.h>
 /*	from: @(#)bdinit.c	8.2 (Berkeley) 5/3/95	*/
-__RCSID("$NetBSD: bdinit.c,v 1.23 2022/05/28 08:19:18 rillig Exp $");
+__RCSID("$NetBSD: bdinit.c,v 1.24 2022/05/28 08:32:55 rillig Exp $");
 
 #include <string.h>
 #include "gomoku.h"
@@ -48,6 +48,7 @@ bdinit(struct spotstr *bp)
 	struct combostr *cbp;
 
 	game.nmoves = 0;
+	game.winning_spot = 0;
 
 	/* mark the borders as such */
 	sp = bp;

Index: src/games/gomoku/bdisp.c
diff -u src/games/gomoku/bdisp.c:1.48 src/games/gomoku/bdisp.c:1.49
--- src/games/gomoku/bdisp.c:1.48	Sat May 28 08:19:18 2022
+++ src/games/gomoku/bdisp.c	Sat May 28 08:32:55 2022
@@ -1,4 +1,4 @@
-/*	$NetBSD: bdisp.c,v 1.48 2022/05/28 08:19:18 rillig Exp $	*/
+/*	$NetBSD: bdisp.c,v 1.49 2022/05/28 08:32:55 rillig Exp $	*/
 
 /*
  * Copyright (c) 1994
@@ -34,7 +34,7 @@
 
 #include <sys/cdefs.h>
 /*	@(#)bdisp.c	8.2 (Berkeley) 5/3/95	*/
-__RCSID("$NetBSD: bdisp.c,v 1.48 2022/05/28 08:19:18 rillig Exp $");
+__RCSID("$NetBSD: bdisp.c,v 1.49 2022/05/28 08:32:55 rillig Exp $");
 
 #include <curses.h>
 #include <string.h>
@@ -148,6 +148,19 @@ bdwho(void)
 	    bw, plyr[BLACK], ww, plyr[WHITE]);
 }
 
+static bool
+should_highlight(int s)
+{
+
+	if (game.nmoves > 0 && game.moves[game.nmoves - 1] == s)
+		return true;
+	if (game.winning_spot != 0)
+		for (int i = 0; i < 5; i++)
+			if (s == game.winning_spot + i * dd[game.winning_dir])
+				return true;
+	return false;
+}
+
 /*
  * Update the board display after a move.
  */
@@ -171,8 +184,7 @@ bdisp(void)
 				c = pcolor[sp->s_occ];
 
 			move(scr_y(j), scr_x(i));
-			if (game.nmoves > 0 &&
-			    game.moves[game.nmoves - 1] == PT(i, j)) {
+			if (should_highlight(PT(i, j))) {
 				attron(A_BOLD);
 				addch(c);
 				attroff(A_BOLD);

Index: src/games/gomoku/gomoku.h
diff -u src/games/gomoku/gomoku.h:1.43 src/games/gomoku/gomoku.h:1.44
--- src/games/gomoku/gomoku.h:1.43	Sat May 28 08:19:18 2022
+++ src/games/gomoku/gomoku.h	Sat May 28 08:32:55 2022
@@ -1,4 +1,4 @@
-/*	$NetBSD: gomoku.h,v 1.43 2022/05/28 08:19:18 rillig Exp $	*/
+/*	$NetBSD: gomoku.h,v 1.44 2022/05/28 08:32:55 rillig Exp $	*/
 
 /*
  * Copyright (c) 1994
@@ -218,6 +218,8 @@ struct	spotstr {
 struct game {
 	int moves[BSZ * BSZ];		/* log of all played moves */
 	unsigned int nmoves;		/* number of played moves */
+	int winning_spot;
+	int winning_dir;
 };
 
 extern	const char	letters[];

Index: src/games/gomoku/makemove.c
diff -u src/games/gomoku/makemove.c:1.32 src/games/gomoku/makemove.c:1.33
--- src/games/gomoku/makemove.c:1.32	Sat May 28 08:19:18 2022
+++ src/games/gomoku/makemove.c	Sat May 28 08:32:55 2022
@@ -1,4 +1,4 @@
-/*	$NetBSD: makemove.c,v 1.32 2022/05/28 08:19:18 rillig Exp $	*/
+/*	$NetBSD: makemove.c,v 1.33 2022/05/28 08:32:55 rillig Exp $	*/
 
 /*
  * Copyright (c) 1994
@@ -34,7 +34,7 @@
 
 #include <sys/cdefs.h>
 /*	@(#)makemove.c	8.2 (Berkeley) 5/3/95	*/
-__RCSID("$NetBSD: makemove.c,v 1.32 2022/05/28 08:19:18 rillig Exp $");
+__RCSID("$NetBSD: makemove.c,v 1.33 2022/05/28 08:32:55 rillig Exp $");
 
 #include "gomoku.h"
 
@@ -154,8 +154,11 @@ makemove(int us, int mv)
 		}
 
 		/* check for game over */
-		if (n == 5)
+		if (n == 5) {
+		    game.winning_spot = (int)(fsp - board);
+		    game.winning_dir = r;
 		    return WIN;
+		}
 
 		/* compute new value & combo number for this frame & color */
 		fsp->s_fval[us != BLACK ? BLACK : WHITE][r].s = 0x600;

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