sudo legal moves

src/types.h

@@ -1,9 +1,13 @@
+#ifndef CHESS_TYPES_H
+#define CHESS_TYPES_H
+
 #include <stdbool.h>
 #include <stdint.h>
 
 #define BOARD_SIZE 8
 #define TOTAL_BOARD_SIZE BOARD_SIZE * BOARD_SIZE
 #define LENGTH(array) (sizeof array / sizeof *array)
+#define NOT_SELECTED UINT_LEAST8_MAX
 
 enum pieces {
 	NOTHING,
@@ -19,3 +23,5 @@ struct piece_t {
 	uint_least8_t type;
 	bool white;
 };
+
+#endif