/*
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 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) {
}
inline char file_to_char(File f) {
- return char(f - FILE_A) + 'a';
+ return char(f - FILE_A + int('a'));
}
inline Rank rank_from_char(char c) {
}
inline char rank_to_char(Rank r) {
- return char(r - RANK_1) + '1';
+ return char(r - RANK_1 + int('1'));
}
inline Square square_from_string(const std::string& str) {
}
inline const std::string square_to_string(Square s) {
- std::string str;
- str += file_to_char(square_file(s));
- str += rank_to_char(square_rank(s));
- return str;
+ 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) {