13 #define BlackFlag (1 << 0)
14 #define WhiteFlag (1 << 1)
16 #define Black BlackFlag
17 #define White WhiteFlag
22 extern bool colour_is_ok (int colour);
24 extern bool colour_is_white (int colour);
25 extern bool colour_is_black (int colour);
26 extern bool colour_equal (int colour_1, int colour_2);
28 extern int colour_opp (int colour);
30 #endif // !defined COLOUR_H