Optimise board edge handling

This new organisation assumes that you'll do very few modifications
before calling forEachMoves again.

1 files changed, 3 insertions, 4 deletions

diff --git a/ai_rand.cpp b/ai_rand.cpp
index 7479d01..c4df24e 100644
--- a/ai_rand.cpp
+++ b/ai_rand.cpp
@@ -11,9 +11,8 @@ int RAND::calcMove(Board &bd, uint8_t myclr) {
 	(void)myclr;
 	assert(bd.bag.totalLeft() > 0);
 
-	int moves[BSZ * BSZ], nmoves = 0;
-	bd.forEachMove([&moves, &nmoves](int idx) { moves[nmoves++] = idx; });
+	const vector<int> &moves = bd.getEdgeCells();
 
-	assert(nmoves > 0);
-	return moves[random() % nmoves];
+	assert(moves.size() > 0);
+	return moves[random() % moves.size()];
 }