1 files changed, 34 insertions, 1 deletions
diff --git a/src/engine/moves.h b/src/engine/moves.h
index b63b9e2..bd88eeb 100644
--- a/src/engine/moves.h
+++ b/src/engine/moves.h
@@ -6,9 +6,27 @@
 
 typedef u8 square_t;
 
+// think about the chess move notation
+// e4, Nf6, Qh3+, Qe1#, a8=Q, i need to store the information needed to
+// recreate this in move_t
+enum {
+  MOVE_CAPTURE       =  1,                                          
+  MOVE_SHORT_CASTLE  =  1 << 1,                                  
+  MOVE_LONG_CASTLE   =  1 << 2,                                  
+
+  // technically these promotation flags can be compressed to only use 2 bits..
+  MOVE_PROMOTE_Q     =  1 << 3, // 1 <<  5
+  MOVE_PROMOTE_R     =  1 << 4, // 2 <<  5
+  MOVE_PROMOTE_B     =  1 << 5, // 3 <<  5
+  MOVE_PROMOTE_N     =  1 << 6, // 4 <<  5 ? nvm it uses 3
+  MOVE_EN_PASSANT    =  1 << 7,
+  MOVE_CHECK         =  1 << 8,
+};
+
 typedef struct {
   square_t from;
   square_t to;
+  u16 flags;
 } move_t;
 void position_make_move(position_t* position, move_t* move);
 
@@ -21,7 +39,22 @@ typedef struct {
 moves_t moves_init();
 moves_t moves_init_wcapacity(u32 capacity);
 moves_t moves_empty();
-void add_move(moves_t* moves, square_t from, square_t to);
+
+struct add_move_params {
+  u16 flags;
+};
+#define add_move(moves, from, to, ...) _add_move(\
+  moves, \
+  from, \
+  to, \
+  (struct add_move_params) { .flags = 0, __VA_ARGS__ }\
+)
+void _add_move(
+  moves_t* moves,
+  square_t from,
+  square_t to,
+  struct add_move_params params
+);
 
 void get_pawn_moves(moves_t* moves, position_t position);
 void get_knight_moves(moves_t* moves, position_t position);