feat: compute knight attack table

1 files changed, 31 insertions, 3 deletions

diff --git a/src/board.h b/src/board.h
index f7e89f2..154878c 100644
--- a/src/board.h
+++ b/src/board.h
@@ -10,7 +10,7 @@
 #define QUEEN  0b1000
 #define KING   0b1010
 
-typedef QWORD Bitboard;
+typedef U64 Bitboard;
 
 typedef struct {
   Bitboard pieces[12];
@@ -19,6 +19,33 @@ typedef struct {
   BYTE en_passant_square;
 } Board;
 
+enum enumSquare {
+  a1, b1, c1, d1, e1, f1, g1, h1,
+  a2, b2, c2, d2, e2, f2, g2, h2,
+  a3, b3, c3, d3, e3, f3, g3, h3,
+  a4, b4, c4, d4, e4, f4, g4, h4,
+  a5, b5, c5, d5, e5, f5, g5, h5,
+  a6, b6, c6, d6, e6, f6, g6, h6,
+  a7, b7, c7, d7, e7, f7, g7, h7,
+  a8, b8, c8, d8, e8, f8, g8, h8
+};
+
+#define notAFile 0xFEFEFEFEFEFEFEFE
+#define notBFile 0xFDFDFDFDFDFDFDFD
+#define notGFile 0xBFBFBFBFBFBFBFBF
+#define notHFile 0x7F7F7F7F7F7F7F7F
+
+static const char* notation[64] = {
+  "a1", "b1", "c1", "d1", "e1", "f1", "g1", "h1",
+  "a2", "b2", "c2", "d2", "e2", "f2", "g2", "h2",
+  "a3", "b3", "c3", "d3", "e3", "f3", "g3", "h3",
+  "a4", "b4", "c4", "d4", "e4", "f4", "g4", "h4",
+  "a5", "b5", "c5", "d5", "e5", "f5", "g5", "h5",
+  "a6", "b6", "c6", "d6", "e6", "f6", "g6", "h6",
+  "a7", "b7", "c7", "d7", "e7", "f7", "g7", "h7",
+  "a8", "b8", "c8", "d8", "e8", "f8", "g8", "h8"
+};
+
 static const char* pieces[] = {
   "♟︎", "♙",
   "♞", "♘",
@@ -28,5 +55,6 @@ static const char* pieces[] = {
   "♚", "♔",
 };
 
-void index_to_notation(BYTE index, char notation[2]);
-BYTE notation_to_index(char file, int rank);
+void precompute_knight_attack_table();
+void print_bitboard(Bitboard bb);
+int pop_count(Bitboard bb);