X-Git-Url: https://git.sesse.net/?p=stockfish;a=blobdiff_plain;f=src%2Fsquare.h;h=0e314b04ac809f017d42d162a8d381caad9b8d99;hp=7a59e078fdc7ec4a02a0a7e2068752778a513668;hb=324ca87affc4959f7017e83437fb06b6e770449c;hpb=cb7f20913e04b051fea6ac9a4055a4e86be452d1

diff --git a/src/square.h b/src/square.h
index 7a59e078..0e314b04 100644
--- a/src/square.h
+++ b/src/square.h
@@ -17,25 +17,15 @@
   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,
@@ -49,11 +39,11 @@ enum Square {
 };
 
 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 {
@@ -68,26 +58,14 @@ enum SquareDelta {
   DELTA_NW = DELTA_N + DELTA_W
 };
 
-ENABLE_OPERATORS_ON(Square);
-ENABLE_OPERATORS_ON(File);
-ENABLE_OPERATORS_ON(Rank);
-ENABLE_OPERATORS_ON(SquareDelta);
-
-
-////
-//// Constants
-////
+ENABLE_OPERATORS_ON(Square)
+ENABLE_OPERATORS_ON(File)
+ENABLE_OPERATORS_ON(Rank)
+ENABLE_OPERATORS_ON(SquareDelta)
 
 const int FlipMask = 56;
 const int FlopMask =  7;
 
-extern int8_t DirectionTable[64][64];
-
-
-////
-//// Inline functions
-////
-
 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); }
@@ -117,17 +95,21 @@ inline Square relative_square(Color c, Square s) {
   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) {
@@ -180,23 +162,7 @@ inline bool rank_is_ok(Rank r) {
 }
 
 inline bool square_is_ok(Square s) {
-  return file_is_ok(square_file(s)) && rank_is_ok(square_rank(s));
-}
-
-inline bool squares_aligned(Square s1, Square s2, Square s3) {
-  return   DirectionTable[s1][s2] != DELTA_NONE
-        && abs(DirectionTable[s1][s2]) ==  abs(DirectionTable[s2][s3]);
+  return s >= SQ_A1 && s <= SQ_H8;
 }
 
-inline bool direction_is_straight(Square s1, Square s2) {
-  return   abs(DirectionTable[s1][s2]) == DELTA_N
-        || abs(DirectionTable[s1][s2]) == DELTA_E;
-}
-
-////
-//// Prototypes
-////
-
-extern void init_direction_table();
-
 #endif // !defined(SQUARE_H_INCLUDED)