X-Git-Url: https://git.sesse.net/?p=stockfish;a=blobdiff_plain;f=src%2Fsquare.h;h=88ae1363a6943263ead7095487f78b745f35a798;hp=3afa127aaf14aac7bbd600dd7f81e59d89aa02c1;hb=94a67c49b0238200bbd4b167d067f067ff4aad30;hpb=bb751d6c890f5c50c642366d601740366cfae8d0
diff --git a/src/square.h b/src/square.h
index 3afa127a..88ae1363 100644
--- a/src/square.h
+++ b/src/square.h
@@ -1,17 +1,18 @@
/*
- Glaurung, a UCI chess playing engine.
- Copyright (C) 2004-2008 Tord Romstad
+ Stockfish, a UCI chess playing engine derived from Glaurung 2.1
+ Copyright (C) 2004-2008 Tord Romstad (Glaurung author)
+ Copyright (C) 2008-2010 Marco Costalba, Joona Kiiski, Tord Romstad
- Glaurung is free software: you can redistribute it and/or modify
+ 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.
-
- Glaurung is distributed in the hope that it will be useful,
+
+ 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 .
*/
@@ -24,6 +25,7 @@
//// Includes
////
+#include // for abs()
#include
#include "color.h"
@@ -44,7 +46,7 @@ enum Square {
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
-};
+};
enum File {
FILE_A, FILE_B, FILE_C, FILE_D, FILE_E, FILE_F, FILE_G, FILE_H, FILE_NONE
@@ -55,55 +57,39 @@ enum Rank {
};
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
+
+ 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,
};
+ENABLE_OPERATORS_ON(Square);
+ENABLE_OPERATORS_ON(File);
+ENABLE_OPERATORS_ON(Rank);
+ENABLE_OPERATORS_ON(SquareDelta);
+
////
//// Constants
////
-const int FlipMask = 070;
-const int FlopMask = 07;
+const int FlipMask = 56;
+const int FlopMask = 7;
-////
+////
//// 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));
-}
+inline Square operator+ (Square x, SquareDelta i) { return x + Square(i); }
+inline void operator+= (Square& x, SquareDelta i) { x = x + Square(i); }
+inline Square operator- (Square x, SquareDelta i) { return x - Square(i); }
+inline void operator-= (Square& x, SquareDelta i) { x = x - Square(i); }
inline Square make_square(File f, Rank r) {
return Square(int(f) | (int(r) << 3));
@@ -129,12 +115,17 @@ inline Square relative_square(Color c, Square s) {
return Square(int(s) ^ (int(c) * FlipMask));
}
-inline Rank pawn_rank(Color c, Square s) {
+inline Rank relative_rank(Color c, Square s) {
return square_rank(relative_square(c, s));
}
-inline Color square_color(Square s) {
- return Color((int(square_file(s)) + int(square_rank(s))) & 1);
+inline SquareColor square_color(Square s) {
+ return SquareColor((int(square_file(s)) + int(square_rank(s))) & 1);
+}
+
+inline bool same_color_squares(Square s1, Square s2) {
+ int s = int(s1) ^ int(s2);
+ return (((s >> 3) ^ s) & 1) == 0;
}
inline int file_distance(File f1, File f2) {
@@ -157,21 +148,37 @@ 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'));
+}
-////
-//// Prototypes
-////
+inline Rank rank_from_char(char c) {
+ return Rank(c - '1') + RANK_1;
+}
-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 char rank_to_char(Rank r) {
+ return char(r - RANK_1 + int('1'));
+}
-extern bool file_is_ok(File f);
-extern bool rank_is_ok(Rank r);
-extern bool square_is_ok(Square s);
+inline const std::string square_to_string(Square s) {
+ return std::string(1, file_to_char(square_file(s)))
+ + std::string(1, rank_to_char(square_rank(s)));
+}
+inline bool file_is_ok(File f) {
+ return f >= FILE_A && f <= FILE_H;
+}
+
+inline bool rank_is_ok(Rank r) {
+ return r >= RANK_1 && r <= RANK_8;
+}
+
+inline bool square_is_ok(Square s) {
+ return file_is_ok(square_file(s)) && rank_is_ok(square_rank(s));
+}
#endif // !defined(SQUARE_H_INCLUDED)