2 Stockfish, a UCI chess playing engine derived from Glaurung 2.1
3 Copyright (C) 2004-2008 Tord Romstad (Glaurung author)
4 Copyright (C) 2008-2010 Marco Costalba, Joona Kiiski, Tord Romstad
6 Stockfish is free software: you can redistribute it and/or modify
7 it under the terms of the GNU General Public License as published by
8 the Free Software Foundation, either version 3 of the License, or
9 (at your option) any later version.
11 Stockfish is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 GNU General Public License for more details.
16 You should have received a copy of the GNU General Public License
17 along with this program. If not, see <http://www.gnu.org/licenses/>.
21 #if !defined(PIECE_H_INCLUDED)
22 #define PIECE_H_INCLUDED
38 PAWN = 1, KNIGHT = 2, BISHOP = 3, ROOK = 4, QUEEN = 5, KING = 6
42 NO_PIECE = 0, WP = 1, WN = 2, WB = 3, WR = 4, WQ = 5, WK = 6,
43 BP = 9, BN = 10, BB = 11, BR = 12, BQ = 13, BK = 14,
44 EMPTY = 16, OUTSIDE = 17
52 const int SlidingArray[18] = {
53 0, 0, 0, 1, 2, 3, 0, 0, 0, 0, 0, 1, 2, 3, 0, 0, 0, 0
61 inline Piece operator+ (Piece p, int i) { return Piece(int(p) + i); }
62 inline void operator++ (Piece &p, int) { p = Piece(int(p) + 1); }
63 inline Piece operator- (Piece p, int i) { return Piece(int(p) - i); }
64 inline void operator-- (Piece &p, int) { p = Piece(int(p) - 1); }
65 inline PieceType operator+ (PieceType p, int i) {return PieceType(int(p) + i);}
66 inline void operator++ (PieceType &p, int) { p = PieceType(int(p) + 1); }
67 inline PieceType operator- (PieceType p, int i) {return PieceType(int(p) - i);}
68 inline void operator-- (PieceType &p, int) { p = PieceType(int(p) - 1); }
70 inline PieceType type_of_piece(Piece p) {
71 return PieceType(int(p) & 7);
74 inline Color color_of_piece(Piece p) {
75 return Color(int(p) >> 3);
78 inline Piece piece_of_color_and_type(Color c, PieceType pt) {
79 return Piece((int(c) << 3) | int(pt));
82 inline int piece_is_slider(Piece p) {
83 return SlidingArray[int(p)];
86 inline SquareDelta pawn_push(Color c) {
87 return (c == WHITE ? DELTA_N : DELTA_S);
90 inline bool piece_type_is_ok(PieceType pc) {
91 return pc >= PAWN && pc <= KING;
94 inline bool piece_is_ok(Piece pc) {
95 return piece_type_is_ok(type_of_piece(pc)) && color_is_ok(color_of_piece(pc));
103 extern char piece_type_to_char(PieceType pt, bool upcase = false);
104 extern PieceType piece_type_from_char(char c);
107 #endif // !defined(PIECE_H_INCLUDED)