+/* values for player bitmasks */
+#define PLAYER_BITS_NONE 0
+#define PLAYER_BITS_1 (1 << 0)
+#define PLAYER_BITS_2 (1 << 1)
+#define PLAYER_BITS_3 (1 << 2)
+#define PLAYER_BITS_4 (1 << 3)
+#define PLAYER_BITS_ANY (PLAYER_BITS_1 | \
+ PLAYER_BITS_2 | \
+ PLAYER_BITS_3 | \
+ PLAYER_BITS_4)
+#define PLAYER_BITS_TRIGGER (1 << 4)
+