Use simple macro to enable operators

[stockfish] / src / square.h

diff --git a/src/square.h b/src/square.h
index eb5a5c39eb13903abc3e25023e71feefcc3304ea..f89c72eefe6b770075594b7092ca1b42d1ce9185 100644 (file)
--- a/src/square.h
+++ b/src/square.h
@@ -1,7 +1,7 @@
 /*
   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
@@ -57,55 +57,38 @@ 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_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
 };
 
+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));
@@ -135,8 +118,13 @@ 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) {
@@ -159,21 +147,37 @@ 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;
+}
 
-////
-//// Prototypes
-////
+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'));
+}
 
-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 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)));
+}
 
-extern bool file_is_ok(File f);
-extern bool rank_is_ok(Rank r);
-extern bool square_is_ok(Square 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)