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68 lines
1.5 KiB
C++
68 lines
1.5 KiB
C++
/*
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Stockfish, a UCI chess playing engine derived from Glaurung 2.1
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Copyright (C) 2004-2008 Tord Romstad (Glaurung author)
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Copyright (C) 2008-2009 Marco Costalba
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Stockfish 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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Stockfish 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 <cassert>
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#include <cstring>
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#include "maxgain.h"
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#include "value.h"
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////
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//// Functions
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////
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/// Constructor
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MaxGain::MaxGain() { clear(); }
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/// MaxGain::clear() clears the table
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void MaxGain::clear() {
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memset(maxStaticValueDelta, 0, 16 * 64 * 64 * sizeof(int));
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}
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/// MaxGain::store
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void MaxGain::store(Piece p, Square from, Square to, Value prev, Value curr)
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{
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if (prev == VALUE_NONE || curr == VALUE_NONE)
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return;
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Value delta = curr - prev;
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if (delta >= maxStaticValueDelta[p][from][to])
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maxStaticValueDelta[p][from][to] = delta;
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else
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maxStaticValueDelta[p][from][to]--;
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}
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// MaxGain::retrieve
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Value MaxGain::retrieve(Piece p, Square from, Square to)
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{
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return (Value) maxStaticValueDelta[p][from][to];
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}
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