From ae31e19f92e717919ac8e3db9039eb38d2b89aae Mon Sep 17 00:00:00 2001
From: in2 <in2@63ad8ddf-47c3-0310-b6dd-a9e9d9715204>
Date: Thu, 7 Mar 2002 15:13:44 +0000
Subject: Initial revision

git-svn-id: http://opensvn.csie.org/pttbbs/pttbbs/trunk/pttbbs@1 63ad8ddf-47c3-0310-b6dd-a9e9d9715204
---
 mbbsd/gomo1.c | 136 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 136 insertions(+)
 create mode 100644 mbbsd/gomo1.c

(limited to 'mbbsd/gomo1.c')

diff --git a/mbbsd/gomo1.c b/mbbsd/gomo1.c
new file mode 100644
index 00000000..953bad2d
--- /dev/null
+++ b/mbbsd/gomo1.c
@@ -0,0 +1,136 @@
+/* $Id: gomo1.c,v 1.1 2002/03/07 15:13:48 in2 Exp $ */
+#include <stdio.h>
+#include <stdlib.h>
+#include <sys/types.h>
+#include "config.h"
+#include "pttstruct.h"
+#include "proto.h"
+
+#define QCAST   int (*)(const void *, const void *)
+
+#define BBLANK (0)  /* 空白 */
+#define BBLACK (1)  /* 黑子, 先手 */
+#define BWHITE (2)  /* 白子, 後手 */
+#ifndef BRDSIZ
+#define BRDSIZ (15) /* 棋盤單邊大小 */
+#endif
+
+extern char ku[BRDSIZ][BRDSIZ];
+
+/* pattern and advance map */
+extern unsigned char *pat, *adv;
+
+static int intrevcmp(const void *a, const void *b) {
+    return (*(int *)b - *(int *)a);
+}
+
+/* x,y: 0..BRDSIZ-1 ; color: CBLACK,CWHITE ; dx,dy: -1,0,+1 */
+static int gomo_getindex(int x, int y, int color, int dx, int dy) {
+    int i, k, n;
+    for(n = -1, i = 0, k = 1; i < 5; i++, k <<= 1) {
+	x += dx;
+	y += dy;
+	
+	if((x < 0) || (x >= BRDSIZ) || ( y < 0) || ( y >= BRDSIZ)) {
+	    n += k;
+	    break;
+	} else if(ku[x][y] != BBLANK) {
+	    n += k;
+	    if(ku[x][y] != color)
+		break;
+	}
+    }
+    
+    if(i >= 5)
+	n += k;
+
+    return n;
+}
+
+int chkwin(int style, int limit) {
+    if(style == 0x0c)
+	return 1 /* style */;
+    else if(limit == 0) {
+	if(style == 0x0b)
+	    return 1 /* style */;
+	return 0;
+    }
+    if((style < 0x0c) && (style > 0x07))
+	return -1 /* -style */;
+    return 0;
+}
+
+/* x,y: 0..BRDSIZ-1 ; color: CBLACK,CWHITE ; limit:1,0 ; dx,dy: 0,1 */
+static int dirchk(int x, int y, int color, int limit, int dx, int dy) {
+    int le, ri, loc, style;
+
+    le = gomo_getindex(x, y, color, -dx, -dy);
+    ri = gomo_getindex(x, y, color, dx,  dy);
+
+    loc = (le > ri) ? (((le * (le + 1)) >> 1) + ri) :
+	(((ri * (ri + 1)) >> 1) + le);
+    
+    style = pat[loc];
+    
+    if(limit == 0)
+	return (style & 0x0f);
+
+    style >>= 4;
+    
+    if((style == 3) || (style == 2)) {
+	int i, n, tmp, nx, ny;
+	
+	n = adv[loc >> 1];
+	
+	((loc & 1) == 0) ? (n >>= 4) : (n &= 0x0f);
+	
+	ku[x][y] = color;
+	
+	for(i = 0; i < 2; i++) {
+	    if((tmp = (i == 0) ? (-(n >> 2)):(n & 3)) != 0) {
+		nx = x + (le > ri ? 1 : -1) * tmp * dx;
+		ny = y + (le > ri ? 1 : -1) * tmp * dy;
+		
+		if((dirchk(nx, ny, color, 0, dx, dy) == 0x06) &&
+		   (chkwin(getstyle(nx, ny, color, limit), limit) >= 0))
+		    break;
+	    }
+	}
+	if(i >= 2)
+	    style = 0;
+	ku[x][y] = BBLANK;
+    }
+    return style;
+}
+
+/* 例外=F 錯誤=E 有子=D 連五=C 連六=B 雙四=A 四四=9 三三=8 */
+/* 四三=7 活四=6 斷四=5 死四=4 活三=3 斷三=2 保留=1 無效=0 */
+
+/* x,y: 0..BRDSIZ-1 ; color: CBLACK,CWHITE ; limit: 1,0 */
+int getstyle(int x, int y, int color, int limit) {
+    int i, j, dir[4], style;
+
+    if((x < 0) || (x >= BRDSIZ) || ( y < 0) || (y >= BRDSIZ))
+	return 0x0f;
+    if(ku[x][y] != BBLANK)
+	return 0x0d;
+
+    for(i = 0; i < 4; i++)
+	dir[i] = dirchk(x, y, color, limit, i ? (i>>1) : -1, i ? (i&1) : 1);
+
+    qsort(dir, 4, sizeof(int), (QCAST)intrevcmp);
+
+    if((style = dir[0]) >= 2) {
+	for(i = 1, j = 6 + (limit ? 1 : 0); i < 4; i++) {
+	    if((style > j) || (dir[i] < 2))
+		break;
+	    if(dir[i] > 3)
+		style = 9;
+	    else if((style < 7) && (style > 3))
+		style = 7;
+	    else
+		style = 8;
+	}
+    }
+    return style;
+}
-- 
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