From 32f8c138b0287905a0a42bb2ef9246e2b9d43672 Mon Sep 17 00:00:00 2001
From: Petr Baudis <pasky@ucw.cz>
Date: Wed, 17 Sep 2008 21:28:26 +0200
Subject: [PATCH] Board: Introduce optional BOARD_SIZE for constant board size

Should allow for better optimization if enabled.
---
 board.c | 4 ++++
 board.h | 7 +++++++
 2 files changed, 11 insertions(+)

diff --git a/board.c b/board.c
index 757eba5..93f2b7e 100644
--- a/board.c
+++ b/board.c
@@ -89,8 +89,12 @@ board_done(struct board *board)
 void
 board_resize(struct board *board, int size)
 {
+#ifdef BOARD_SIZE
+	assert(board_size(*board) == size + 2);
+#else
 	board_size(*board) = size + 2 /* S_OFFBOARD margin */;
 	board_size2(*board) = board_size(*board) * board_size(*board);
+#endif
 	if (board->b)
 		free(board->b);
 
diff --git a/board.h b/board.h
index bc737df..15e713d 100644
--- a/board.h
+++ b/board.h
@@ -14,6 +14,7 @@
 /* The board implementation has bunch of optional features.
  * Turn them on below: */
 #define WANT_BOARD_C // required by playout_moggy
+//#define BOARD_SIZE 9 // constant board size, allows better optimization
 
 
 /* Allow board_play_random_move() to return pass even when
@@ -105,8 +106,14 @@ struct board {
 	hash_t hash;
 };
 
+#ifdef BOARD_SIZE
+/* Avoid unused variable warnings */
+#define board_size(b_) ((&(b_) == &(b_)) ? BOARD_SIZE + 2 : 0)
+#define board_size2(b_) (board_size(b_) * board_size(b_))
+#else
 #define board_size(b_) ((b_).size)
 #define board_size2(b_) ((b_).size2)
+#endif
 
 #define board_at(b_, c) ((b_)->b[coord_raw(c)])
 #define board_atxy(b_, x, y) ((b_)->b[(x) + board_size(b_) * (y)])
-- 
2.11.4.GIT