////
-//// Constants and variables
+//// Constants
////
const PieceType PieceTypeMin = PAWN;
const PieceType PieceTypeMax = KING;
-extern const int SlidingArray[18];
-extern const SquareDelta Directions[16][16];
-extern const SquareDelta PawnPush[2];
+const int SlidingArray[18] = {
+ 0, 0, 0, 1, 2, 3, 0, 0, 0, 0, 0, 1, 2, 3, 0, 0, 0, 0
+};
+
+const SquareDelta Directions[16][16] = {
+ {DELTA_ZERO},
+ {DELTA_NW, DELTA_NE, DELTA_ZERO},
+ {DELTA_SSW, DELTA_SSE, DELTA_SWW, DELTA_SEE,
+ DELTA_NWW, DELTA_NEE, DELTA_NNW, DELTA_NNE, DELTA_ZERO},
+ {DELTA_SE, DELTA_SW, DELTA_NE, DELTA_NW, DELTA_ZERO},
+ {DELTA_S, DELTA_E, DELTA_W, DELTA_N, DELTA_ZERO},
+ {DELTA_S, DELTA_E, DELTA_W, DELTA_N,
+ DELTA_SE, DELTA_SW, DELTA_NE, DELTA_NW, DELTA_ZERO},
+ {DELTA_S, DELTA_E, DELTA_W, DELTA_N,
+ DELTA_SE, DELTA_SW, DELTA_NE, DELTA_NW, DELTA_ZERO},
+ {DELTA_ZERO},
+ {DELTA_ZERO},
+ {DELTA_SW, DELTA_SE, DELTA_ZERO},
+ {DELTA_SSW, DELTA_SSE, DELTA_SWW, DELTA_SEE,
+ DELTA_NWW, DELTA_NEE, DELTA_NNW, DELTA_NNE, DELTA_ZERO},
+ {DELTA_SE, DELTA_SW, DELTA_NE, DELTA_NW, DELTA_ZERO},
+ {DELTA_S, DELTA_E, DELTA_W, DELTA_N, DELTA_ZERO},
+ {DELTA_S, DELTA_E, DELTA_W, DELTA_N,
+ DELTA_SE, DELTA_SW, DELTA_NE, DELTA_NW, DELTA_ZERO},
+ {DELTA_S, DELTA_E, DELTA_W, DELTA_N,
+ DELTA_SE, DELTA_SW, DELTA_NE, DELTA_NW, DELTA_ZERO},
+};
+
+const SquareDelta PawnPush[2] = {
+ DELTA_N, DELTA_S
+};
////
return PawnPush[c];
}
+inline bool piece_type_is_ok(PieceType pc) {
+ return pc >= PAWN && pc <= KING;
+}
+
+inline bool piece_is_ok(Piece pc) {
+ return piece_type_is_ok(type_of_piece(pc)) && color_is_ok(color_of_piece(pc));
+}
+
////
//// Prototypes
extern char piece_type_to_char(PieceType pt, bool upcase = false);
extern PieceType piece_type_from_char(char c);
-extern bool piece_is_ok(Piece pc);
-extern bool piece_type_is_ok(PieceType pt);
#endif // !defined(PIECE_H_INCLUDED)