/*
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
return Color((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) {
return abs(int(f1) - int(f2));
}
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'));
+}
-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 Rank rank_from_char(char c) {
+ return Rank(c - '1') + RANK_1;
+}
-extern bool file_is_ok(File f);
-extern bool rank_is_ok(Rank r);
-extern bool square_is_ok(Square s);
+inline char rank_to_char(Rank r) {
+ return char(r - RANK_1 + int('1'));
+}
+inline Square square_from_string(const std::string& str) {
+ return make_square(file_from_char(str[0]), rank_from_char(str[1]));
+}
+
+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)