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| Rev | Author | Line No. | Line |
|---|---|---|---|
| 99 | pmbaty | 1 | /* |
| 2 | Texel - A UCI chess engine. |
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| 3 | Copyright (C) 2013-2014 Peter Österlund, peterosterlund2@gmail.com |
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| 4 | |||
| 5 | This program is free software: you can redistribute it and/or modify |
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| 6 | it under the terms of the GNU General Public License as published by |
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| 7 | the Free Software Foundation, either version 3 of the License, or |
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| 8 | (at your option) any later version. |
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| 9 | |||
| 10 | This program is distributed in the hope that it will be useful, |
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| 11 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
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| 12 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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| 13 | GNU General Public License for more details. |
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| 14 | |||
| 15 | You should have received a copy of the GNU General Public License |
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| 16 | along with this program. If not, see <http://www.gnu.org/licenses/>. |
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| 17 | */ |
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| 18 | |||
| 19 | /* |
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| 20 | * material.hpp |
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| 21 | * |
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| 22 | * Created on: May 1, 2013 |
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| 23 | * Author: petero |
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| 24 | */ |
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| 25 | |||
| 26 | #ifndef MATERIAL_HPP_ |
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| 27 | #define MATERIAL_HPP_ |
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| 28 | |||
| 29 | #include "piece.hpp" |
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| 30 | |||
| 31 | /** |
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| 32 | * An incrementally updated material identifier. |
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| 33 | * For each legal piece configuration, a unique identifier is computed. |
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| 34 | */ |
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| 35 | class MatId { |
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| 36 | public: |
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| 37 | static const int WP = 1; |
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| 38 | static const int WR = 9; |
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| 39 | static const int WN = 91; |
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| 40 | static const int WB = 767; |
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| 41 | static const int WQ = 5903; |
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| 42 | |||
| 43 | static const int BP = 1 << 16; |
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| 44 | static const int BR = 9 << 16; |
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| 45 | static const int BN = 91 << 16; |
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| 46 | static const int BB = 767 << 16; |
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| 47 | static const int BQ = 5903 << 16; |
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| 48 | |||
| 49 | MatId(); |
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| 50 | |||
| 51 | /** Add a piece to the material configuration. */ |
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| 52 | void addPiece(int pType); |
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| 53 | |||
| 54 | /** Remove a piece from the material configuration. */ |
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| 55 | void removePiece(int pType); |
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| 56 | |||
| 57 | /** Add cnt pieces of tyep ptype to the material configuration. */ |
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| 58 | void addPieceCnt(int pType, int cnt); |
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| 59 | |||
| 60 | /** Get the material configuration identifier. */ |
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| 61 | int operator()() const; |
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| 62 | |||
| 63 | /** Get ID for black/white mirror position. */ |
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| 64 | static int mirror(int id); |
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| 65 | |||
| 66 | private: |
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| 67 | int hash; |
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| 68 | static const int materialId[Piece::nPieceTypes]; |
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| 69 | }; |
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| 70 | |||
| 71 | inline |
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| 72 | MatId::MatId() |
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| 73 | : hash(0) { |
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| 74 | } |
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| 75 | |||
| 76 | inline void |
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| 77 | MatId::addPiece(int pType) { |
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| 78 | hash += materialId[pType]; |
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| 79 | } |
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| 80 | |||
| 81 | inline void |
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| 82 | MatId::removePiece(int pType) { |
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| 83 | hash -= materialId[pType]; |
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| 84 | } |
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| 85 | |||
| 86 | inline void |
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| 87 | MatId::addPieceCnt(int pType, int cnt) { |
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| 88 | hash += materialId[pType] * cnt; |
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| 89 | } |
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| 90 | |||
| 91 | inline int |
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| 92 | MatId::operator()() const { |
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| 93 | return hash; |
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| 94 | } |
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| 95 | |||
| 96 | inline int |
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| 97 | MatId::mirror(int h) { |
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| 98 | unsigned int ret = h; |
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| 99 | return (ret >> 16) | ((ret & 0xffff) << 16); |
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| 100 | } |
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| 101 | |||
| 102 | #endif /* MATERIAL_HPP_ */ |