Initial import of Glaurung 2.1

src/square.cpp

@@ -0,0 +1,85 @@
+/*
+  Glaurung, a UCI chess playing engine.
+  Copyright (C) 2004-2008 Tord Romstad
+
+  Glaurung is free software: you can redistribute it and/or modify
+  it under the terms of the GNU General Public License as published by
+  the Free Software Foundation, either version 3 of the License, or
+  (at your option) any later version.
+  
+  Glaurung is distributed in the hope that it will be useful,
+  but WITHOUT ANY WARRANTY; without even the implied warranty of
+  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+  GNU General Public License for more details.
+  
+  You should have received a copy of the GNU General Public License
+  along with this program.  If not, see <http://www.gnu.org/licenses/>.
+*/
+
+
+////
+//// Includes
+////
+
+#include <cassert>
+#include <cstdio>
+#include <string>
+
+#include "square.h"
+
+
+////
+//// Functions
+////
+
+
+/// Translating files, ranks and squares to/from characters and strings:
+
+File file_from_char(char c) {
+  return File(c - 'a') + FILE_A;
+}
+
+
+char file_to_char(File f) {
+  return char(f - FILE_A) + 'a';
+}
+
+
+Rank rank_from_char(char c) {
+  return Rank(c - '1') + RANK_1;
+}
+
+
+char rank_to_char(Rank r) {
+  return char(r - RANK_1) + '1';
+}
+
+
+Square square_from_string(const std::string &str) {
+  return make_square(file_from_char(str[0]), rank_from_char(str[1]));
+}
+
+
+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;
+}
+
+
+/// file_is_ok(), rank_is_ok() and square_is_ok(), for debugging:
+
+bool file_is_ok(File f) {
+  return f >= FILE_A && f <= FILE_H;
+}
+
+
+bool rank_is_ok(Rank r) {
+  return r >= RANK_1 && r <= RANK_8;
+}
+
+
+bool square_is_ok(Square s) {
+  return file_is_ok(square_file(s)) && rank_is_ok(square_rank(s));
+}