1
2 /* This file contains code for X-CHESS.
3 Copyright (C) 1986 Free Software Foundation, Inc.
4
5 This file is part of X-CHESS.
6
7 X-CHESS is distributed in the hope that it will be useful,
8 but WITHOUT ANY WARRANTY. No author or distributor
9 accepts responsibility to anyone for the consequences of using it
10 or for whether it serves any particular purpose or works at all,
11 unless he says so in writing. Refer to the X-CHESS General Public
12 License for full details.
13
14 Everyone is granted permission to copy, modify and redistribute
15 X-CHESS, but only under the conditions described in the
16 X-CHESS General Public License. A copy of this license is
17 supposed to have been given to you along with X-CHESS so you
18 can know your rights and responsibilities. It should be in a
19 file named COPYING. Among other things, the copyright notice
20 and this notice must be preserved on all copies. */
21
22
23 /* RCS Info: $Revision: 1.4 $ on $Date: 86/11/23 17:17:15 $
24 * $Source: /users/faustus/xchess/RCS/board.c,v $
25 * Copyright (c) 1986 Wayne A. Christopher, U. C. Berkeley CAD Group
26 * Permission is granted to do anything with this code except sell it
27 * or remove this message.
28 *
29 * Stuff to deal with the board.
30 */
31
32 #include "xchess.h"
33
34 board *chessboard;
35
36 void
board_setup()37 board_setup()
38 {
39 chessboard = alloc(board);
40 board_init(chessboard);
41 return;
42 }
43
44 void
board_init(b)45 board_init(b)
46 board *b;
47 {
48 int i, j;
49
50 for (i = 0; i < 2; i++)
51 for (j = 0; j < SIZE; j++)
52 b->square[i][j].color = BLACK;
53 for (i = 2; i < 6; i++)
54 for (j = 0; j < SIZE; j++)
55 b->square[i][j].color = NONE;
56 for (i = 6; i < 8; i++)
57 for (j = 0; j < SIZE; j++)
58 b->square[i][j].color = WHITE;
59 for (i = 0; i < SIZE; i++)
60 b->square[1][i].type = b->square[6][i].type =
61 PAWN;
62 b->square[0][0].type = b->square[7][0].type = ROOK;
63 b->square[0][1].type = b->square[7][1].type = KNIGHT;
64 b->square[0][2].type = b->square[7][2].type = BISHOP;
65 b->square[0][3].type = b->square[7][3].type = QUEEN;
66 b->square[0][4].type = b->square[7][4].type = KING;
67 b->square[0][5].type = b->square[7][5].type = BISHOP;
68 b->square[0][6].type = b->square[7][6].type = KNIGHT;
69 b->square[0][7].type = b->square[7][7].type = ROOK;
70 b->black_cant_castle_k = false;
71 b->black_cant_castle_q = false;
72 b->white_cant_castle_k = false;
73 b->white_cant_castle_q = false;
74
75 return;
76 }
77
78 void
board_drawall()79 board_drawall()
80 {
81 int i, j;
82
83 for (i = 0; i < SIZE; i++)
84 for (j = 0; j < SIZE; j++)
85 if (chessboard->square[i][j].color != NONE) {
86 win_drawpiece(&chessboard->square[i][j], i,
87 j, WHITE);
88 if (!oneboard)
89 win_drawpiece(&chessboard->square[i][j],
90 i, j, BLACK);
91 }
92 return;
93 }
94
95 void
board_move(b,m)96 board_move(b, m)
97 board *b;
98 move *m;
99 {
100 switch (m->type) {
101
102 case MOVE:
103 case CAPTURE:
104 b->square[m->fromy][m->fromx].color = NONE;
105 b->square[m->toy][m->tox].color = m->piece.color;
106 b->square[m->toy][m->tox].type = m->piece.type;
107 if ((m->piece.type == PAWN) && (((m->piece.color == BLACK) &&
108 (m->toy == 7)) || ((m->piece.color == WHITE) &&
109 (m->toy == 0))))
110 b->square[m->toy][m->tox].type = QUEEN;
111 if (m->enpassant)
112 b->square[m->toy + ((m->piece.color == WHITE) ? 1 :
113 -1)][m->tox].color = NONE;
114 break;
115
116 case KCASTLE:
117 if (m->piece.color == WHITE) {
118 b->square[7][5].color = m->piece.color;
119 b->square[7][5].type = ROOK;
120 b->square[7][6].color = m->piece.color;
121 b->square[7][6].type = KING;
122 b->square[7][4].color = NONE;
123 b->square[7][7].color = NONE;
124 } else {
125 b->square[0][5].color = m->piece.color;
126 b->square[0][5].type = ROOK;
127 b->square[0][6].color = m->piece.color;
128 b->square[0][6].type = KING;
129 b->square[0][4].color = NONE;
130 b->square[0][7].color = NONE;
131 }
132 break;
133
134 case QCASTLE:
135 if (m->piece.color == WHITE) {
136 b->square[7][3].color = m->piece.color;
137 b->square[7][3].type = ROOK;
138 b->square[7][2].color = m->piece.color;
139 b->square[7][2].type = KING;
140 b->square[7][4].color = NONE;
141 b->square[7][0].color = NONE;
142 } else {
143 b->square[0][3].color = m->piece.color;
144 b->square[0][3].type = ROOK;
145 b->square[0][2].color = m->piece.color;
146 b->square[0][2].type = KING;
147 b->square[0][4].color = NONE;
148 b->square[0][0].color = NONE;
149 }
150 break;
151
152 default:
153 fprintf(stderr, "Bad move type %d\n", m->type);
154 }
155
156 if (m->piece.type == KING) {
157 if (m->piece.color == WHITE)
158 b->white_cant_castle_q =
159 b->white_cant_castle_k= true;
160 else
161 b->black_cant_castle_q =
162 b->black_cant_castle_k= true;
163 } else if (m->piece.type == ROOK) {
164 if (m->piece.color == WHITE) {
165 if (m->fromx == 0)
166 b->white_cant_castle_q = true;
167 else if (m->fromx == 7)
168 b->white_cant_castle_k = true;
169 } else {
170 if (m->fromx == 0)
171 b->black_cant_castle_q = true;
172 else if (m->fromx == 7)
173 b->black_cant_castle_k = true;
174 }
175 }
176
177 return;
178 }
179
180