/*
Stockfish, a UCI chess playing engine derived from Glaurung 2.1
Copyright (C) 2004-2008 Tord Romstad (Glaurung author)
- Copyright (C) 2008 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
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
-
+
Stockfish is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
-
+
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
-
#if !defined(SQUARE_H_INCLUDED)
#define SQUARE_H_INCLUDED
-////
-//// Includes
-////
-
+#include <cstdlib> // for abs()
#include <string>
-#include "color.h"
#include "misc.h"
-
-
-////
-//// Types
-////
+#include "piece.h"
enum Square {
SQ_A1, SQ_B1, SQ_C1, SQ_D1, SQ_E1, SQ_F1, SQ_G1, SQ_H1,
SQ_A6, SQ_B6, SQ_C6, SQ_D6, SQ_E6, SQ_F6, SQ_G6, SQ_H6,
SQ_A7, SQ_B7, SQ_C7, SQ_D7, SQ_E7, SQ_F7, SQ_G7, SQ_H7,
SQ_A8, SQ_B8, SQ_C8, SQ_D8, SQ_E8, SQ_F8, SQ_G8, SQ_H8,
- SQ_NONE
-};
+ SQ_NONE,
+
+ DELTA_N = 8,
+ DELTA_E = 1,
+ DELTA_S = -8,
+ DELTA_W = -1,
+
+ DELTA_NN = DELTA_N + DELTA_N,
+ DELTA_NE = DELTA_N + DELTA_E,
+ DELTA_SE = DELTA_S + DELTA_E,
+ DELTA_SS = DELTA_S + DELTA_S,
+ DELTA_SW = DELTA_S + DELTA_W,
+ DELTA_NW = DELTA_N + DELTA_W
+};
enum File {
- FILE_A, FILE_B, FILE_C, FILE_D, FILE_E, FILE_F, FILE_G, FILE_H, FILE_NONE
+ FILE_A, FILE_B, FILE_C, FILE_D, FILE_E, FILE_F, FILE_G, FILE_H
};
enum Rank {
- RANK_1, RANK_2, RANK_3, RANK_4, RANK_5, RANK_6, RANK_7, RANK_8, RANK_NONE
+ RANK_1, RANK_2, RANK_3, RANK_4, RANK_5, RANK_6, RANK_7, RANK_8
};
-enum SquareDelta {
- DELTA_SSW = -021, DELTA_SS = -020, DELTA_SSE = -017, DELTA_SWW = -012,
- DELTA_SW = -011, DELTA_S = -010, DELTA_SE = -07, DELTA_SEE = -06,
- DELTA_W = -01, DELTA_ZERO = 0, DELTA_E = 01, DELTA_NWW = 06, DELTA_NW = 07,
- DELTA_N = 010, DELTA_NE = 011, DELTA_NEE = 012, DELTA_NNW = 017,
- DELTA_NN = 020, DELTA_NNE = 021
+enum SquareColor {
+ DARK, LIGHT
};
-
-////
-//// Constants
-////
-
-const int FlipMask = 070;
-const int FlopMask = 07;
-
-
-////
-//// Inline functions
-////
-
-inline File operator+ (File x, int i) { return File(int(x) + i); }
-inline File operator+ (File x, File y) { return x + int(y); }
-inline void operator++ (File &x, int) { x = File(int(x) + 1); }
-inline void operator+= (File &x, int i) { x = File(int(x) + i); }
-inline File operator- (File x, int i) { return File(int(x) - i); }
-inline void operator-- (File &x, int) { x = File(int(x) - 1); }
-inline void operator-= (File &x, int i) { x = File(int(x) - i); }
-
-inline Rank operator+ (Rank x, int i) { return Rank(int(x) + i); }
-inline Rank operator+ (Rank x, Rank y) { return x + int(y); }
-inline void operator++ (Rank &x, int) { x = Rank(int(x) + 1); }
-inline void operator+= (Rank &x, int i) { x = Rank(int(x) + i); }
-inline Rank operator- (Rank x, int i) { return Rank(int(x) - i); }
-inline void operator-- (Rank &x, int) { x = Rank(int(x) - 1); }
-inline void operator-= (Rank &x, int i) { x = Rank(int(x) - i); }
-
-inline Square operator+ (Square x, int i) { return Square(int(x) + i); }
-inline void operator++ (Square &x, int) { x = Square(int(x) + 1); }
-inline void operator+= (Square &x, int i) { x = Square(int(x) + i); }
-inline Square operator- (Square x, int i) { return Square(int(x) - i); }
-inline void operator-- (Square &x, int) { x = Square(int(x) - 1); }
-inline void operator-= (Square &x, int i) { x = Square(int(x) - i); }
-inline Square operator+ (Square x, SquareDelta i) { return Square(int(x) + i); }
-inline void operator+= (Square &x, SquareDelta i) { x = Square(int(x) + i); }
-inline Square operator- (Square x, SquareDelta i) { return Square(int(x) - i); }
-inline void operator-= (Square &x, SquareDelta i) { x = Square(int(x) - i); }
-inline SquareDelta operator- (Square x, Square y) {
- return SquareDelta(int(x) - int(y));
-}
+ENABLE_OPERATORS_ON(Square)
+ENABLE_OPERATORS_ON(File)
+ENABLE_OPERATORS_ON(Rank)
inline Square make_square(File f, Rank r) {
- return Square(int(f) | (int(r) << 3));
+ return Square((int(r) << 3) | int(f));
}
inline File square_file(Square s) {
}
inline Square flip_square(Square s) {
- return Square(int(s) ^ FlipMask);
+ return Square(int(s) ^ 56);
}
inline Square flop_square(Square s) {
- return Square(int(s) ^ FlopMask);
+ return Square(int(s) ^ 7);
}
inline Square relative_square(Color c, Square s) {
- return Square(int(s) ^ (int(c) * FlipMask));
+ return Square(int(s) ^ (int(c) * 56));
}
-inline Rank relative_rank(Color c, Square s) {
- return square_rank(relative_square(c, s));
+inline Rank relative_rank(Color c, Rank r) {
+ return Rank(int(r) ^ (int(c) * 7));
}
-inline Color square_color(Square s) {
- return Color((int(square_file(s)) + int(square_rank(s))) & 1);
+inline Rank relative_rank(Color c, Square s) {
+ return relative_rank(c, square_rank(s));
}
-inline int file_distance(File f1, File f2) {
- return abs(int(f1) - int(f2));
+inline SquareColor square_color(Square s) {
+ return SquareColor(int(square_rank(s) + s) & 1);
}
-inline int file_distance(Square s1, Square s2) {
- return file_distance(square_file(s1), square_file(s2));
+inline bool opposite_color_squares(Square s1, Square s2) {
+ int s = int(s1) ^ int(s2);
+ return ((s >> 3) ^ s) & 1;
}
-inline int rank_distance(Rank r1, Rank r2) {
- return abs(int(r1) - int(r2));
+inline int file_distance(Square s1, Square s2) {
+ return abs(square_file(s1) - square_file(s2));
}
inline int rank_distance(Square s1, Square s2) {
- return rank_distance(square_rank(s1), square_rank(s2));
+ return abs(square_rank(s1) - square_rank(s2));
}
inline int square_distance(Square s1, Square s2) {
return Max(file_distance(s1, s2), rank_distance(s1, s2));
}
+inline File file_from_char(char c) {
+ return File(c - 'a') + FILE_A;
+}
+
+inline char file_to_char(File f) {
+ return char(f - FILE_A + int('a'));
+}
+
+inline Rank rank_from_char(char c) {
+ return Rank(c - '1') + RANK_1;
+}
+
+inline char rank_to_char(Rank r) {
+ return char(r - RANK_1 + int('1'));
+}
-////
-//// Prototypes
-////
+inline const std::string square_to_string(Square s) {
+ char ch[] = { file_to_char(square_file(s)), rank_to_char(square_rank(s)), 0 };
+ return std::string(ch);
+}
-extern File file_from_char(char c);
-extern char file_to_char(File f);
-extern Rank rank_from_char(char c);
-extern char rank_to_char(Rank r);
-extern Square square_from_string(const std::string &str);
-extern const std::string square_to_string(Square s);
+inline bool file_is_ok(File f) {
+ return f >= FILE_A && f <= FILE_H;
+}
-extern bool file_is_ok(File f);
-extern bool rank_is_ok(Rank r);
-extern bool square_is_ok(Square s);
+inline bool rank_is_ok(Rank r) {
+ return r >= RANK_1 && r <= RANK_8;
+}
+inline bool square_is_ok(Square s) {
+ return s >= SQ_A1 && s <= SQ_H8;
+}
#endif // !defined(SQUARE_H_INCLUDED)
projects / stockfish / blobdiff