/*
Stockfish, a UCI chess playing engine derived from Glaurung 2.1
Copyright (C) 2004-2008 Tord Romstad (Glaurung author)
- Copyright (C) 2008-2009 Marco Costalba
+ Copyright (C) 2008-2010 Marco Costalba, Joona Kiiski, Tord Romstad
Stockfish is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
-
#if !defined(PIECE_H_INCLUDED)
#define PIECE_H_INCLUDED
-////
-//// Includes
-////
-
#include "color.h"
-#include "square.h"
-
-
-////
-//// Types
-////
+#include "value.h"
enum PieceType {
- NO_PIECE_TYPE = 0,
- PAWN = 1, KNIGHT = 2, BISHOP = 3, ROOK = 4, QUEEN = 5, KING = 6,
- BISHOP_AND_QUEEN = 8, ROOK_AND_QUEEN = 9
+ PIECE_TYPE_NONE = 0,
+ PAWN = 1, KNIGHT = 2, BISHOP = 3, ROOK = 4, QUEEN = 5, KING = 6
};
enum Piece {
- NO_PIECE = 0, WP = 1, WN = 2, WB = 3, WR = 4, WQ = 5, WK = 6,
- BP = 9, BN = 10, BB = 11, BR = 12, BQ = 13, BK = 14,
- EMPTY = 16, OUTSIDE = 17
-};
-
-
-////
-//// Constants
-////
-
-const int SlidingArray[18] = {
- 0, 0, 0, 1, 2, 3, 0, 0, 0, 0, 0, 1, 2, 3, 0, 0, 0, 0
+ PIECE_NONE_DARK_SQ = 0, WP = 1, WN = 2, WB = 3, WR = 4, WQ = 5, WK = 6,
+ BP = 9, BN = 10, BB = 11, BR = 12, BQ = 13, BK = 14, PIECE_NONE = 16
};
-
-////
-//// Inline functions
-////
-
-inline Piece operator+ (Piece p, int i) { return Piece(int(p) + i); }
-inline void operator++ (Piece &p, int) { p = Piece(int(p) + 1); }
-inline Piece operator- (Piece p, int i) { return Piece(int(p) - i); }
-inline void operator-- (Piece &p, int) { p = Piece(int(p) - 1); }
-inline PieceType operator+ (PieceType p, int i) {return PieceType(int(p) + i);}
-inline void operator++ (PieceType &p, int) { p = PieceType(int(p) + 1); }
-inline PieceType operator- (PieceType p, int i) {return PieceType(int(p) - i);}
-inline void operator-- (PieceType &p, int) { p = PieceType(int(p) - 1); }
+ENABLE_OPERATORS_ON(PieceType)
+ENABLE_OPERATORS_ON(Piece)
+
+/// Important: If the material values are changed, one must also
+/// adjust the piece square tables, and the method game_phase() in the
+/// Position class!
+///
+/// Values modified by Joona Kiiski
+
+const Value PawnValueMidgame = Value(0x0C6);
+const Value PawnValueEndgame = Value(0x102);
+const Value KnightValueMidgame = Value(0x331);
+const Value KnightValueEndgame = Value(0x34E);
+const Value BishopValueMidgame = Value(0x344);
+const Value BishopValueEndgame = Value(0x359);
+const Value RookValueMidgame = Value(0x4F6);
+const Value RookValueEndgame = Value(0x4FE);
+const Value QueenValueMidgame = Value(0x9D9);
+const Value QueenValueEndgame = Value(0x9FE);
+
+inline Piece make_piece(Color c, PieceType pt) {
+ return Piece((int(c) << 3) | int(pt));
+}
inline PieceType type_of_piece(Piece p) {
return PieceType(int(p) & 7);
return Color(int(p) >> 3);
}
-inline Piece piece_of_color_and_type(Color c, PieceType pt) {
- return Piece((int(c) << 3) | int(pt));
-}
-
-inline int piece_is_slider(Piece p) {
- return SlidingArray[int(p)];
+inline bool piece_type_is_ok(PieceType pt) {
+ return pt >= PAWN && pt <= KING;
}
-inline int piece_is_slider(PieceType pt) {
- return SlidingArray[int(pt)];
+inline bool piece_is_ok(Piece p) {
+ return piece_type_is_ok(type_of_piece(p)) && color_is_ok(color_of_piece(p));
}
-inline SquareDelta pawn_push(Color c) {
- return (c == WHITE ? DELTA_N : DELTA_S);
+inline char piece_type_to_char(PieceType pt) {
+ static const char ch[] = " PNBRQK";
+ return ch[pt];
}
-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);
-
-
#endif // !defined(PIECE_H_INCLUDED)