Wed, 16 Apr 2014 21:16:05 +0200
fixed Move struct size inconsistancy across plattforms
1 /*
2 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
3 *
4 * Copyright 2014 Mike Becker. All rights reserved.
5 *
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions are met:
8 *
9 * 1. Redistributions of source code must retain the above copyright
10 * notice, this list of conditions and the following disclaimer.
11 *
12 * 2. Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution.
15 *
16 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
17 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
19 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
20 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
21 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
22 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
23 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
24 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
25 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
26 * POSSIBILITY OF SUCH DAMAGE.
27 *
28 */
30 #include "rules.h"
31 #include "king.h"
32 #include <stdlib.h>
34 static _Bool king_castling_chkmoved(GameState *gamestate,
35 uint8_t row, uint8_t file) {
37 MoveList *ml = gamestate->movelist;
38 while (ml) {
39 if (ml->move.fromfile == file && ml->move.fromrow == row) {
40 return 1;
41 }
42 ml = ml->next;
43 }
45 return 0;
46 }
48 _Bool king_chkrules(GameState *gamestate, Move* move) {
49 if (abs(move->torow - move->fromrow) <= 1 &&
50 abs(move->tofile - move->fromfile) <= 1) {
51 return 1;
52 } else {
53 /* castling */
54 if (move->fromrow == move->torow &&
55 move->fromrow == ((move->piece&COLOR_MASK) == WHITE ? 0 : 7) &&
56 move->fromfile == fileidx('e') &&
57 (move->tofile == fileidx('c') || move->tofile == fileidx('g'))) {
59 return !king_castling_chkmoved(gamestate,
60 move->fromrow, move->fromfile) &&
61 !king_castling_chkmoved(gamestate, move->fromrow,
62 move->tofile == fileidx('c') ? 0 : 7);
63 } else {
64 return 0;
65 }
66 }
67 }
69 _Bool king_isblocked(GameState *gamestate, Move *move) {
71 uint8_t opponent_color = opponent_color(move->piece&COLOR_MASK);
72 _Bool blocked = is_covered(gamestate, move->torow, move->tofile,
73 opponent_color);
75 if (abs(move->tofile - move->fromfile) == 2) {
76 if (move->tofile == fileidx('c')) {
77 blocked |= gamestate->board[move->torow][fileidx('b')];
78 }
79 uint8_t midfile = (move->tofile+move->fromfile)/2;
80 blocked |= gamestate->lastmove->move.check ||
81 gamestate->board[move->torow][midfile] ||
82 is_covered(gamestate, move->torow, midfile, opponent_color);
83 }
85 return blocked;
86 }
88 int king_getlocation(GameState *gamestate, Move *move) {
90 uint8_t file, row;
92 for (int f = -1 ; f <= 1 ; f++) {
93 for (int r = -1 ; r <= 1 ; r++) {
94 if (f == 0 && r == 0) {
95 continue;
96 }
97 file = move->tofile + f;
98 row = move->torow + r;
99 if (isidx(file) && isidx(row)) {
100 if (gamestate->board[row][file] == move->piece) {
101 if ((move->fromfile != POS_UNSPECIFIED
102 && move->fromfile != file) ||
103 (move->fromrow != POS_UNSPECIFIED
104 && move->fromrow != row)) {
105 return INVALID_POSITION;
106 }
107 move->fromfile = file;
108 move->fromrow = row;
109 return VALID_MOVE_SYNTAX;
110 }
111 }
112 }
113 }
115 return INVALID_POSITION;
116 }