board: 新增 locationToPlayer() 函数

src/game/board.cpp

@@ -195,12 +195,17 @@ square_t Board::polarToSquare(int r, int s)
     return static_cast<square_t>(r * N_SEATS + s - 1);
 }
 
+player_t Board::locationToPlayer(square_t square)
+{
+    return player_t(locations[square] & 0x30);
+}
+
 int Board::inHowManyMills(square_t square, player_t player)
 {
     int n = 0;
 
     if (player == PLAYER_NOBODY) {
-        player = player_t(locations[square] & 0x30);
+        player = locationToPlayer(square);
     }
 
     for (int l = 0; l < LINE_TYPES_COUNT; l++) {
@@ -223,7 +228,7 @@ int Board::addMills(square_t square)
     uint64_t mill = 0;
     int n = 0;
     int idx[3], min, temp;
-    char m = locations[square] & 0x30;
+    player_t m = locationToPlayer(square);
 
     for (int i = 0; i < 3; i++) {
         idx[0] = square;

src/game/board.h

@@ -109,6 +109,8 @@ public:
 
     static void printBoard();
 
+    player_t locationToPlayer(square_t square);
+
 //private:
 
     // 棋局，抽象为一个 5*8 的数组，上下两行留空
@@ -117,8 +119,8 @@ public:
         0x0F 代表禁点
         0x11~0x1C 代表先手第 1~12 子
         0x21~0x2C 代表后手第 1~12 子
-        判断棋子是先手的用 (locations[i] & 0x10)
+        判断棋子是先手的用 (locations[square] & 0x10)
-        判断棋子是后手的用 (locations[i] & 0x20)
+        判断棋子是后手的用 (locations[square] & 0x20)
      */
     location_t locations[SQ_EXPANDED_COUNT]{};
 

src/game/player.h

@@ -43,7 +43,7 @@ public:
 
     inline static int toId(player_t player)
     {
-        return player == PLAYER_BLACK ? 1 : 2;
+        return player >> PLAYER_SHIFT;
     }
 
     inline static player_t idToPlayer(int id)

src/game/position.cpp

@@ -1137,7 +1137,7 @@ hash_t StateInfo::updateHash(square_t square)
     // PieceType is boardLocations[square] 
 
     // 0b00 表示空白，0b01 = 1 表示先手棋子，0b10 = 2 表示后手棋子，0b11 = 3 表示禁点
-    int pieceType = (boardLocations[square] & 0x30) >> 4;
+    int pieceType = Player::toId(position->board.locationToPlayer(square));
 
     // 清除或者放置棋子
     position->hash ^= zobrist[square][pieceType];