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 Marco Costalba
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
39 PAWN = 1, KNIGHT = 2, BISHOP = 3, ROOK = 4, QUEEN = 5, KING = 6
43 NO_PIECE = 0, WP = 1, WN = 2, WB = 3, WR = 4, WQ = 5, WK = 6,
44 BP = 9, BN = 10, BB = 11, BR = 12, BQ = 13, BK = 14,
45 EMPTY = 16, OUTSIDE = 17
53 const PieceType PieceTypeMin = PAWN;
54 const PieceType PieceTypeMax = KING;
56 const int SlidingArray[18] = {
57 0, 0, 0, 1, 2, 3, 0, 0, 0, 0, 0, 1, 2, 3, 0, 0, 0, 0
60 const SquareDelta Directions[16][16] = {
62 {DELTA_NW, DELTA_NE, DELTA_ZERO},
63 {DELTA_SSW, DELTA_SSE, DELTA_SWW, DELTA_SEE,
64 DELTA_NWW, DELTA_NEE, DELTA_NNW, DELTA_NNE, DELTA_ZERO},
65 {DELTA_SE, DELTA_SW, DELTA_NE, DELTA_NW, DELTA_ZERO},
66 {DELTA_S, DELTA_E, DELTA_W, DELTA_N, DELTA_ZERO},
67 {DELTA_S, DELTA_E, DELTA_W, DELTA_N,
68 DELTA_SE, DELTA_SW, DELTA_NE, DELTA_NW, DELTA_ZERO},
69 {DELTA_S, DELTA_E, DELTA_W, DELTA_N,
70 DELTA_SE, DELTA_SW, DELTA_NE, DELTA_NW, DELTA_ZERO},
73 {DELTA_SW, DELTA_SE, DELTA_ZERO},
74 {DELTA_SSW, DELTA_SSE, DELTA_SWW, DELTA_SEE,
75 DELTA_NWW, DELTA_NEE, DELTA_NNW, DELTA_NNE, DELTA_ZERO},
76 {DELTA_SE, DELTA_SW, DELTA_NE, DELTA_NW, DELTA_ZERO},
77 {DELTA_S, DELTA_E, DELTA_W, DELTA_N, DELTA_ZERO},
78 {DELTA_S, DELTA_E, DELTA_W, DELTA_N,
79 DELTA_SE, DELTA_SW, DELTA_NE, DELTA_NW, DELTA_ZERO},
80 {DELTA_S, DELTA_E, DELTA_W, DELTA_N,
81 DELTA_SE, DELTA_SW, DELTA_NE, DELTA_NW, DELTA_ZERO},
84 const SquareDelta PawnPush[2] = {
93 inline Piece operator+ (Piece p, int i) { return Piece(int(p) + i); }
94 inline void operator++ (Piece &p, int) { p = Piece(int(p) + 1); }
95 inline Piece operator- (Piece p, int i) { return Piece(int(p) - i); }
96 inline void operator-- (Piece &p, int) { p = Piece(int(p) - 1); }
97 inline PieceType operator+ (PieceType p, int i) {return PieceType(int(p) + i);}
98 inline void operator++ (PieceType &p, int) { p = PieceType(int(p) + 1); }
99 inline PieceType operator- (PieceType p, int i) {return PieceType(int(p) - i);}
100 inline void operator-- (PieceType &p, int) { p = PieceType(int(p) - 1); }
102 inline PieceType type_of_piece(Piece p) {
103 return PieceType(int(p) & 7);
106 inline Color color_of_piece(Piece p) {
107 return Color(int(p) >> 3);
110 inline Piece piece_of_color_and_type(Color c, PieceType pt) {
111 return Piece((int(c) << 3) | int(pt));
114 inline Piece pawn_of_color(Color c) {
115 return piece_of_color_and_type(c, PAWN);
118 inline Piece knight_of_color(Color c) {
119 return piece_of_color_and_type(c, KNIGHT);
122 inline Piece bishop_of_color(Color c) {
123 return piece_of_color_and_type(c, BISHOP);
126 inline Piece rook_of_color(Color c) {
127 return piece_of_color_and_type(c, ROOK);
130 inline Piece queen_of_color(Color c) {
131 return piece_of_color_and_type(c, QUEEN);
134 inline Piece king_of_color(Color c) {
135 return piece_of_color_and_type(c, KING);
138 inline int piece_is_slider(Piece p) {
139 return SlidingArray[int(p)];
142 inline int piece_type_is_slider(PieceType pt) {
143 return SlidingArray[int(pt)];
146 inline SquareDelta pawn_push(Color c) {
150 inline bool piece_type_is_ok(PieceType pc) {
151 return pc >= PAWN && pc <= KING;
154 inline bool piece_is_ok(Piece pc) {
155 return piece_type_is_ok(type_of_piece(pc)) && color_is_ok(color_of_piece(pc));
163 extern int piece_type_to_char(PieceType pt, bool upcase = false);
164 extern PieceType piece_type_from_char(char c);
167 #endif // !defined(PIECE_H_INCLUDED)