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98 lines
2.3 KiB
C++
98 lines
2.3 KiB
C++
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/*
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Texel - A UCI chess engine.
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Copyright (C) 2013-2014 Peter Österlund, peterosterlund2@gmail.com
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This program 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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This program 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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* material.hpp
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*
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* Created on: May 1, 2013
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* Author: petero
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*/
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#ifndef MATERIAL_HPP_
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#define MATERIAL_HPP_
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#include "piece.hpp"
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/**
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* An incrementally updated material identifier.
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* For each legal piece configuration, a unique identifier is computed.
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*/
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class MatId {
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public:
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static const int WP = 1;
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static const int WR = 9;
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static const int WN = 91;
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static const int WB = 767;
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static const int WQ = 5903;
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static const int BP = 1 << 16;
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static const int BR = 9 << 16;
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static const int BN = 91 << 16;
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static const int BB = 767 << 16;
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static const int BQ = 5903 << 16;
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MatId() : hash(0) {}
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/** Add a piece to the material configuration. */
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void addPiece(int pType);
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/** Remove a piece from the material configuration. */
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void removePiece(int pType);
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/** Add cnt pieces of tyep ptype to the material configuration. */
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void addPieceCnt(int pType, int cnt);
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/** Get the material configuration identifier. */
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int operator()() const;
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/** Get ID for black/white mirror position. */
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static int mirror(int id);
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private:
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int hash;
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static const int materialId[Piece::nPieceTypes];
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};
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inline void
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MatId::addPiece(int pType) {
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hash += materialId[pType];
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}
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inline void
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MatId::removePiece(int pType) {
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hash -= materialId[pType];
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}
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inline void
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MatId::addPieceCnt(int pType, int cnt) {
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hash += materialId[pType] * cnt;
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}
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inline int
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MatId::operator()() const {
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return hash;
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}
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inline int
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MatId::mirror(int h) {
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unsigned int ret = h;
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return (ret >> 16) | ((ret & 0xffff) << 16);
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}
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#endif /* MATERIAL_HPP_ */
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