[src/trunk]: src/games/gomoku gomoku: do not scan the upper border for combos

[rillig <rillig%NetBSD.org@localhost>]

details:   https://anonhg.NetBSD.org/src/rev/45a40f8a44f3
branches:  trunk
changeset: 366526:45a40f8a44f3
user:      rillig <rillig%NetBSD.org@localhost>
date:      Sun May 29 18:05:25 2022 +0000

description:
gomoku: do not scan the upper border for combos

Adding the '+ 1' to the row coordinate added an offset of 20, while the
intended offset was 1.

No functional change, just a bit faster.

diffstat:

 games/gomoku/pickmove.c |  16 ++++++++--------
 1 files changed, 8 insertions(+), 8 deletions(-)

diffs (51 lines):

diff -r 3e147b38f5c0 -r 45a40f8a44f3 games/gomoku/pickmove.c
--- a/games/gomoku/pickmove.c   Sun May 29 17:01:42 2022 +0000
+++ b/games/gomoku/pickmove.c   Sun May 29 18:05:25 2022 +0000
@@ -1,4 +1,4 @@
-/*     $NetBSD: pickmove.c,v 1.62 2022/05/29 17:01:42 rillig Exp $     */
+/*     $NetBSD: pickmove.c,v 1.63 2022/05/29 18:05:25 rillig Exp $     */
 
 /*
  * Copyright (c) 1994
@@ -34,7 +34,7 @@
 
 #include <sys/cdefs.h>
 /*     @(#)pickmove.c  8.2 (Berkeley) 5/3/95   */
-__RCSID("$NetBSD: pickmove.c,v 1.62 2022/05/29 17:01:42 rillig Exp $");
+__RCSID("$NetBSD: pickmove.c,v 1.63 2022/05/29 18:05:25 rillig Exp $");
 
 #include <stdlib.h>
 #include <string.h>
@@ -92,8 +92,8 @@
                return PT((BSZ + 1) / 2, (BSZ + 1) / 2);
 
        /* initialize all the board values */
-       for (unsigned pos = PT(BSZ, BSZ + 1); pos-- > PT(1, 1); ) {
-               struct spotstr *sp = &board[pos];
+       for (spot_index s = PT(BSZ, BSZ) + 1; s-- > PT(1, 1); ) {
+               struct spotstr *sp = &board[s];
                sp->s_combo[BLACK].s = 0x601;
                sp->s_combo[WHITE].s = 0x601;
                sp->s_level[BLACK] = 255;
@@ -358,8 +358,8 @@
        }
 
        /* scan for combos at empty spots */
-       for (unsigned pos = PT(BSZ, BSZ + 1); pos-- > PT(1, 1); ) {
-               sp = &board[pos];
+       for (spot_index s = PT(BSZ, BSZ) + 1; s-- > PT(1, 1); ) {
+               sp = &board[s];
                for (struct elist *ep = sp->s_empty; ep != NULL; ep = nep) {
                        cbp = ep->e_combo;
                        if (cbp->c_combo.s <= sp->s_combo[color].s) {
@@ -566,8 +566,8 @@
 
        /* scan for combos at empty spots */
        int c = curcolor;
-       for (unsigned pos = PT(BSZ, BSZ + 1); pos-- > PT(1, 1); ) {
-               struct spotstr *sp = &board[pos];
+       for (spot_index s = PT(BSZ, BSZ) + 1; s-- > PT(1, 1); ) {
+               struct spotstr *sp = &board[s];
                for (struct elist *ep = sp->s_empty; ep != NULL; ep = nep) {
                        cbp = ep->e_combo;
                        if (cbp->c_combo.s <= sp->s_combo[c].s) {