From fd0bebe7a68f0ff2a4a3a3aa90fc81bc28ee3e66 Mon Sep 17 00:00:00 2001
From: victor <victor@63ad8ddf-47c3-0310-b6dd-a9e9d9715204>
Date: Tue, 9 Sep 2003 06:10:51 +0000
Subject: merge from my branch   merge chc_*.c to chc.c   merge gomo1.c into
 gomo.c   add new feature to chc

git-svn-id: http://opensvn.csie.org/pttbbs/trunk/pttbbs@1171 63ad8ddf-47c3-0310-b6dd-a9e9d9715204
---
 mbbsd/gomo.c | 135 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 135 insertions(+)

(limited to 'mbbsd/gomo.c')

diff --git a/mbbsd/gomo.c b/mbbsd/gomo.c
index 0b64e709..1b95ef4d 100644
--- a/mbbsd/gomo.c
+++ b/mbbsd/gomo.c
@@ -1,6 +1,8 @@
 /* $Id$ */
 #include "bbs.h"
 
+#define QCAST   int (*)(const void *, const void *)
+
 static char    *chess[] = {"●", "○"};
 static int      tick, lastcount, mylasttick, hislasttick;
 
@@ -11,6 +13,139 @@ typedef struct {
 
 static Horder_t *v;
 
+/* pattern and advance map */
+
+static int
+intrevcmp(const void *a, const void *b)
+{
+    return (*(int *)b - *(int *)a);
+}
+
+// 以 (x,y) 為起點, 方向 (dx,dy), 傳回以 bit 表示相鄰哪幾格有子
+// 如 10111 表示該方向相鄰 1,2,3 有子, 4 空地
+// 最高位 1 表示對方的子, 或是牆
+/* 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*=2) {
+	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 = 0;
+
+    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 = 0, tmp, nx, ny;
+
+	n = adv[loc / 2];
+
+	if(loc%2==0)
+	    n/=16;
+	else
+	    n%=16;
+
+	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;
+
+    // (-1,1), (0,1), (1,0), (1,1)
+    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;
+}
 static void
 HO_init(Horder_t *pool)
 {
-- 
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