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