/
piece.cpp
95 lines (73 loc) · 2.63 KB
/
piece.cpp
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
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
/*
Stockfish, a UCI chess playing engine derived from Glaurung 2.1
Copyright (C) 2004-2008 Tord Romstad (Glaurung author)
Copyright (C) 2008 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 <http://www.gnu.org/licenses/>.
*/
////
//// Includes
////
#include <cstring>
#include "piece.h"
////
//// Constants and variables
////
const int SlidingArray[18] = {
0, 0, 0, 1, 2, 3, 0, 0, 0, 0, 0, 1, 2, 3, 0, 0, 0, 0
};
const SquareDelta Directions[16][16] = {
{DELTA_ZERO},
{DELTA_NW, DELTA_NE, DELTA_ZERO},
{DELTA_SSW, DELTA_SSE, DELTA_SWW, DELTA_SEE,
DELTA_NWW, DELTA_NEE, DELTA_NNW, DELTA_NNE, DELTA_ZERO},
{DELTA_SE, DELTA_SW, DELTA_NE, DELTA_NW, DELTA_ZERO},
{DELTA_S, DELTA_E, DELTA_W, DELTA_N, DELTA_ZERO},
{DELTA_S, DELTA_E, DELTA_W, DELTA_N,
DELTA_SE, DELTA_SW, DELTA_NE, DELTA_NW, DELTA_ZERO},
{DELTA_S, DELTA_E, DELTA_W, DELTA_N,
DELTA_SE, DELTA_SW, DELTA_NE, DELTA_NW, DELTA_ZERO},
{DELTA_ZERO},
{DELTA_ZERO},
{DELTA_SW, DELTA_SE, DELTA_ZERO},
{DELTA_SSW, DELTA_SSE, DELTA_SWW, DELTA_SEE,
DELTA_NWW, DELTA_NEE, DELTA_NNW, DELTA_NNE, DELTA_ZERO},
{DELTA_SE, DELTA_SW, DELTA_NE, DELTA_NW, DELTA_ZERO},
{DELTA_S, DELTA_E, DELTA_W, DELTA_N, DELTA_ZERO},
{DELTA_S, DELTA_E, DELTA_W, DELTA_N,
DELTA_SE, DELTA_SW, DELTA_NE, DELTA_NW, DELTA_ZERO},
{DELTA_S, DELTA_E, DELTA_W, DELTA_N,
DELTA_SE, DELTA_SW, DELTA_NE, DELTA_NW, DELTA_ZERO},
};
const SquareDelta PawnPush[2] = {
DELTA_N, DELTA_S
};
////
//// Functions
////
/// Translating piece types to/from English piece letters:
static const char PieceChars[] = " pnbrqk";
char piece_type_to_char(PieceType pt, bool upcase = false) {
return upcase? toupper(PieceChars[pt]) : PieceChars[pt];
}
PieceType piece_type_from_char(char c) {
const char *ch = strchr(PieceChars, tolower(c));
return ch? PieceType(ch - PieceChars) : NO_PIECE_TYPE;
}
/// piece_is_ok() and piece_type_is_ok(), for debugging:
bool piece_is_ok(Piece pc) {
return
piece_type_is_ok(type_of_piece(pc)) &&
color_is_ok(color_of_piece(pc));
}
bool piece_type_is_ok(PieceType pc) {
return pc >= PAWN && pc <= KING;
}