initial files

src/chessdefs.h

@@ -0,0 +1,56 @@
+#ifndef CHESSDEFS_H
+#define CHESSDEFS_H
+
+/* We use the following notation
+ * Bit  Binary          Piece/color
+ *
+ * 0    0000 0001       White
+ * 1    0000 0010       Black
+ *
+ * 2    0000 0100       Pawn
+ * 3    0000 1000       Knight
+ * 4    0001 0000       Bishop
+ * 5    0010 0000       Rook
+ * 6    0100 0000       Queen
+ * 7    1000 0000       King
+ */
+
+//#define INVALID  -1                               /* unused in 0x88 */
+#define EMPTY        0
+
+#define WHITE        (0)                          /* 0000000 0 */
+#define BLACK        (1)                          /* 0000000 1 */
+
+#define PAWN         (1 << 1)                     /* 0000001 0 */
+#define KNIGHT       (1 << 2)                     /* 0000010 0 */
+#define BISHOP       (1 << 3)                     /* 0000100 0 */
+#define ROOK         (1 << 4)                     /* 0001000 0 */
+#define QUEEN        (1 << 5)                     /* 0010000 0 */
+#define KING         (1 << 6)                     /* 0100000 0 */
+
+#define MASK_COLOR   0x01                         /* 0000000 1 */
+#define MASK_PIECE   0x7E                         /* 0111111 0 */
+
+#define COLOR(p)    ((p) & MASK_COLOR)
+#define PIECE(p)    ((p) & MASK_PIECE)
+
+#define IS_WHITE(p)  (!COLOR(p))
+#define IS_BLACK(p)  (COLOR(p))
+
+#define SET_WHITE(p)    ((p) &= ~MASK_COLOR)
+#define SET_BLACK(p)    ((p) |= MASK_COLOR)
+#define SET_COLOR(p, c) (!(c)? SET_WHITE(p): SET_BLACK(p))
+
+#define TURN_WHITE   0
+#define TURN_BLACK   1
+
+typedef unsigned char piece_t, color_t;
+
+#define CASTLE_WK    0x01
+#define CASTLE_WQ    0x02
+#define CASTLE_BK    0x04
+#define CASTLE_BQ    0x08
+#define CASTLE_W     0x03                         /* white castle mask */
+#define CASTLE_B     0x0C                         /* black castle mask */
+
+#endif