////
-//// 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 Piece((int(c) << 3) | int(pt));
}
-inline Piece pawn_of_color(Color c) {
- return piece_of_color_and_type(c, PAWN);
-}
-
-inline Piece knight_of_color(Color c) {
- return piece_of_color_and_type(c, KNIGHT);
-}
-
-inline Piece bishop_of_color(Color c) {
- return piece_of_color_and_type(c, BISHOP);
-}
-
-inline Piece rook_of_color(Color c) {
- return piece_of_color_and_type(c, ROOK);
-}
-
-inline Piece queen_of_color(Color c) {
- return piece_of_color_and_type(c, QUEEN);
-}
-
-inline Piece king_of_color(Color c) {
- return piece_of_color_and_type(c, KING);
-}
-
inline int piece_is_slider(Piece p) {
return SlidingArray[int(p)];
}
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 int 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)