95 lines
2.6 KiB
C++
95 lines
2.6 KiB
C++
/*
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Glaurung, a UCI chess playing engine.
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Copyright (C) 2004-2008 Tord Romstad
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Glaurung is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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Glaurung is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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////
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//// Includes
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////
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#include <cstring>
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#include "piece.h"
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////
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//// Constants and variables
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////
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const int SlidingArray[18] = {
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0, 0, 0, 1, 2, 3, 0, 0, 0, 0, 0, 1, 2, 3, 0, 0, 0, 0
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};
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const SquareDelta Directions[16][16] = {
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{DELTA_ZERO},
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{DELTA_NW, DELTA_NE, DELTA_ZERO},
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{DELTA_SSW, DELTA_SSE, DELTA_SWW, DELTA_SEE,
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DELTA_NWW, DELTA_NEE, DELTA_NNW, DELTA_NNE, DELTA_ZERO},
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{DELTA_SE, DELTA_SW, DELTA_NE, DELTA_NW, DELTA_ZERO},
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{DELTA_S, DELTA_E, DELTA_W, DELTA_N, DELTA_ZERO},
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{DELTA_S, DELTA_E, DELTA_W, DELTA_N,
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DELTA_SE, DELTA_SW, DELTA_NE, DELTA_NW, DELTA_ZERO},
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{DELTA_S, DELTA_E, DELTA_W, DELTA_N,
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DELTA_SE, DELTA_SW, DELTA_NE, DELTA_NW, DELTA_ZERO},
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{DELTA_ZERO},
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{DELTA_ZERO},
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{DELTA_SW, DELTA_SE, DELTA_ZERO},
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{DELTA_SSW, DELTA_SSE, DELTA_SWW, DELTA_SEE,
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DELTA_NWW, DELTA_NEE, DELTA_NNW, DELTA_NNE, DELTA_ZERO},
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{DELTA_SE, DELTA_SW, DELTA_NE, DELTA_NW, DELTA_ZERO},
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{DELTA_S, DELTA_E, DELTA_W, DELTA_N, DELTA_ZERO},
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{DELTA_S, DELTA_E, DELTA_W, DELTA_N,
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DELTA_SE, DELTA_SW, DELTA_NE, DELTA_NW, DELTA_ZERO},
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{DELTA_S, DELTA_E, DELTA_W, DELTA_N,
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DELTA_SE, DELTA_SW, DELTA_NE, DELTA_NW, DELTA_ZERO},
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};
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const SquareDelta PawnPush[2] = {
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DELTA_N, DELTA_S
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};
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////
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//// Functions
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////
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/// Translating piece types to/from English piece letters:
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static const char PieceChars[] = " pnbrqk";
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char piece_type_to_char(PieceType pt, bool upcase = false) {
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return upcase? toupper(PieceChars[pt]) : PieceChars[pt];
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}
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PieceType piece_type_from_char(char c) {
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const char *ch = strchr(PieceChars, tolower(c));
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return ch? PieceType(ch - PieceChars) : NO_PIECE_TYPE;
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}
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/// piece_is_ok() and piece_type_is_ok(), for debugging:
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bool piece_is_ok(Piece pc) {
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return
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piece_type_is_ok(type_of_piece(pc)) &&
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color_is_ok(color_of_piece(pc));
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}
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bool piece_type_is_ok(PieceType pc) {
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return pc >= PAWN && pc <= KING;
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}
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