/*
- Glaurung, a UCI chess playing engine.
- Copyright (C) 2004-2008 Tord Romstad
+ Stockfish, a UCI chess playing engine derived from Glaurung 2.1
+ Copyright (C) 2004-2008 Tord Romstad (Glaurung author)
+ Copyright (C) 2008-2010 Marco Costalba, Joona Kiiski, Tord Romstad
- Glaurung is free software: you can redistribute it and/or modify
+ Stockfish 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,
+
+ Stockfish 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 <cstring>
+#include <string>
#include "piece.h"
-
-////
-//// Constants and variables
-////
-
-const int SlidingArray[18] = {
- 0, 0, 0, 1, 2, 3, 0, 0, 0, 0, 0, 1, 2, 3, 0, 0, 0, 0
-};
-
-const SquareDelta Directions[16][16] = {
- {DELTA_ZERO},
- {DELTA_NW, DELTA_NE, DELTA_ZERO},
- {DELTA_SSW, DELTA_SSE, DELTA_SWW, DELTA_SEE,
- DELTA_NWW, DELTA_NEE, DELTA_NNW, DELTA_NNE, DELTA_ZERO},
- {DELTA_SE, DELTA_SW, DELTA_NE, DELTA_NW, DELTA_ZERO},
- {DELTA_S, DELTA_E, DELTA_W, DELTA_N, DELTA_ZERO},
- {DELTA_S, DELTA_E, DELTA_W, DELTA_N,
- DELTA_SE, DELTA_SW, DELTA_NE, DELTA_NW, DELTA_ZERO},
- {DELTA_S, DELTA_E, DELTA_W, DELTA_N,
- DELTA_SE, DELTA_SW, DELTA_NE, DELTA_NW, DELTA_ZERO},
- {DELTA_ZERO},
- {DELTA_ZERO},
- {DELTA_SW, DELTA_SE, DELTA_ZERO},
- {DELTA_SSW, DELTA_SSE, DELTA_SWW, DELTA_SEE,
- DELTA_NWW, DELTA_NEE, DELTA_NNW, DELTA_NNE, DELTA_ZERO},
- {DELTA_SE, DELTA_SW, DELTA_NE, DELTA_NW, DELTA_ZERO},
- {DELTA_S, DELTA_E, DELTA_W, DELTA_N, DELTA_ZERO},
- {DELTA_S, DELTA_E, DELTA_W, DELTA_N,
- DELTA_SE, DELTA_SW, DELTA_NE, DELTA_NW, DELTA_ZERO},
- {DELTA_S, DELTA_E, DELTA_W, DELTA_N,
- DELTA_SE, DELTA_SW, DELTA_NE, DELTA_NW, DELTA_ZERO},
-};
-
-const SquareDelta PawnPush[2] = {
- DELTA_N, DELTA_S
-};
-
+using namespace std;
////
//// Functions
////
-/// Translating piece types to/from English piece letters:
+/// Translating piece types to/from English piece letters
-static const char PieceChars[] = " pnbrqk";
+static const string PieceChars(" pnbrqk PNBRQK");
-char piece_type_to_char(PieceType pt, bool upcase = false) {
- return upcase? toupper(PieceChars[pt]) : PieceChars[pt];
-}
+char piece_type_to_char(PieceType pt, bool upcase) {
-PieceType piece_type_from_char(char c) {
- const char *ch = strchr(PieceChars, tolower(c));
- return ch? PieceType(ch - PieceChars) : NO_PIECE_TYPE;
+ return PieceChars[pt + int(upcase) * 7];
}
+PieceType piece_type_from_char(char c) {
-/// piece_is_ok() and piece_type_is_ok(), for debugging:
-
-bool piece_is_ok(Piece pc) {
- return
- piece_type_is_ok(type_of_piece(pc)) &&
- color_is_ok(color_of_piece(pc));
-}
+ size_t idx = PieceChars.find(c);
-bool piece_type_is_ok(PieceType pc) {
- return pc >= PAWN && pc <= KING;
+ return idx != string::npos ? PieceType(idx % 7) : NO_PIECE_TYPE;
}