/usr/include/osl/rating/feature/bigramAttack.h is in libosl-dev 0.4.2-1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 | /* bigramAttack.h
*/
#ifndef _BIGRAMATTACK_H
#define _BIGRAMATTACK_H
#include "osl/rating/feature.h"
namespace osl
{
namespace rating
{
class BigramAttack : public Feature
{
int property;
bool same, focus_x;
public:
static const std::string name(int x1, int y1, int x2, int y2, int king_index, bool s, bool f);
BigramAttack(int x1, int y1, int x2, int y2, int king_index, bool s, bool f)
: Feature(name(x1,y1,x2,y2,king_index,s,f)), property((((x1+2)*5+y1+2)*25 + (x2+2)*5+y2+2)*5 + king_index), same(s), focus_x(f)
{
}
// [0,4]
static int indexKing(Player attack, Square king, bool focus_x)
{
int x = focus_x ? king.x() : king.y();
if (! focus_x && attack == WHITE)
x = 10 - x;
if (x <= 3)
return x-1;
if (x >= 7)
return x-5;
return 2;
}
static int indexOfMove(Square king, Move move)
{
int x_diff = move.to().x() - king.x();
if (abs(x_diff) > 2)
return -1;
x_diff += 2;
assert(x_diff >= 0 && x_diff <= 4);
int y_diff = move.to().y() - king.y();
if (abs(y_diff) > 2)
return -1;
if (move.player() == WHITE)
y_diff = -y_diff;
y_diff += 2;
assert(y_diff >= 0 && y_diff <= 4);
return x_diff * 5 + y_diff;
}
static int index(const NumEffectState& state, Move move, const RatingEnv& env, bool same, bool focus_x)
{
if (! env.history.hasLastMove(same+1))
return -1;
const Move prev = env.history.lastMove(same+1);
if (! prev.isNormal())
return -1;
const Square king = state.kingSquare(alt(state.turn()));
const int index1 = indexOfMove(king, prev);
if (index1 < 0)
return -1;
const int index2 = indexOfMove(king, move);
if (index2 < 0)
return -1;
return (index1 * 25 + index2) * 5 + indexKing(move.player(), king, focus_x);
}
bool match(const NumEffectState& state, Move move, const RatingEnv& env) const
{
int index = this->index(state, move, env, same, focus_x);
return index == property;
}
};
}
}
#endif /* _BIGRAMATTACK_H */
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// ;;; mode:c++
// ;;; c-basic-offset:2
// ;;; End:
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