pawn forward movement works?

1 files changed, 30 insertions, 2 deletions

diff --git a/src/bitboard.h b/src/bitboard.h
index b92d67f..a816ea6 100644
--- a/src/bitboard.h
+++ b/src/bitboard.h
@@ -28,11 +28,39 @@ enum {
   BLACK_LONG_CASTLE,
 };
 
+enum {
+  WHITE_TURN,
+  BLACK_TURN,
+};
+
+#define BITMASK_RANK_A 255ULL
+#define BITMASK_RANK_B 65280ULL
+#define BITMASK_RANK_C 16711680ULL
+#define BITMASK_RANK_D 4278190080ULL
+#define BITMASK_RANK_E 1095216660480ULL
+#define BITMASK_RANK_F 280375465082880ULL
+#define BITMASK_RANK_G 71776119061217280ULL
+#define BITMASK_RANK_H 18374686479671623680ULL
+#define BITMASK_COLM_1 72340172838076673ULL
+#define BITMASK_COLM_2 144680345676153346ULL
+#define BITMASK_COLM_3 289360691352306692ULL
+#define BITMASK_COLM_4 578721382704613384ULL
+#define BITMASK_COLM_5 1157442765409226768ULL
+#define BITMASK_COLM_6 2314885530818453536ULL
+#define BITMASK_COLM_7 4629771061636907072ULL
+#define BITMASK_COLM_8 9259542123273814144ULL
+
 typedef struct {
   bitboard_t bitboards[PIECE_TYPE_COUNT];
   u8 castling;
-} position;
+  u8 turn;
+} position_t;
+
+position_t position_starting();
+void assert_valid_position(position_t position);
+bitboard_t whites(position_t position);
+bitboard_t blacks(position_t position);
 
-position starting_position();
+void print_bitboard(bitboard_t bitboard);
 
 #endif // !BITBOARD_H