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
-////
-
enum Square {
SQ_A1, SQ_B1, SQ_C1, SQ_D1, SQ_E1, SQ_F1, SQ_G1, SQ_H1,
SQ_A2, SQ_B2, SQ_C2, SQ_D2, SQ_E2, SQ_F2, SQ_G2, SQ_H2,
};
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
-};
-ENABLE_OPERATORS_ON(Square);
-ENABLE_OPERATORS_ON(File);
-ENABLE_OPERATORS_ON(Rank);
-ENABLE_OPERATORS_ON(SquareDelta);
+ DELTA_N = 8, DELTA_E = 1, DELTA_S = -8, DELTA_W = -1, DELTA_NONE = 0,
+ 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
+};
-////
-//// Constants
-////
-
-const int FlipMask = 070;
-const int FlopMask = 07;
-
+ENABLE_OPERATORS_ON(Square)
+ENABLE_OPERATORS_ON(File)
+ENABLE_OPERATORS_ON(Rank)
+ENABLE_OPERATORS_ON(SquareDelta)
-////
-//// Inline functions
-////
+const int FlipMask = 56;
+const int FlopMask = 7;
inline Square operator+ (Square x, SquareDelta i) { return x + Square(i); }
inline void operator+= (Square& x, SquareDelta i) { x = x + Square(i); }
return Square(int(s) ^ (int(c) * FlipMask));
}
+inline Rank relative_rank(Color c, Rank r) {
+ return Rank(int(r) ^ (int(c) * 7));
+}
+
inline Rank relative_rank(Color c, Square s) {
- return square_rank(relative_square(c, s));
+ return relative_rank(c, square_rank(s));
}
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) {
+inline bool opposite_color_squares(Square s1, Square s2) {
int s = int(s1) ^ int(s2);
- return (((s >> 3) ^ s) & 1) == 0;
+ return ((s >> 3) ^ s) & 1;
}
inline int file_distance(File f1, File f2) {
}
inline bool square_is_ok(Square s) {
- return file_is_ok(square_file(s)) && rank_is_ok(square_rank(s));
+ return s >= SQ_A1 && s <= SQ_H8;
}
#endif // !defined(SQUARE_H_INCLUDED)