src/chess/rook.c

Tue, 28 Aug 2018 14:37:09 +0200

author
Mike Becker <universe@uap-core.de>
date
Tue, 28 Aug 2018 14:37:09 +0200
changeset 60
0c50aac49e55
parent 55
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permissions
-rw-r--r--

adds error messages to PGN reader

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1 /*
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2 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
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3 *
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4 * Copyright 2016 Mike Becker. All rights reserved.
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5 *
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6 * Redistribution and use in source and binary forms, with or without
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7 * modification, are permitted provided that the following conditions are met:
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8 *
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9 * 1. Redistributions of source code must retain the above copyright
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10 * notice, this list of conditions and the following disclaimer.
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11 *
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12 * 2. Redistributions in binary form must reproduce the above copyright
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13 * notice, this list of conditions and the following disclaimer in the
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14 * documentation and/or other materials provided with the distribution.
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15 *
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16 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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17 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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19 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
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20 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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21 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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22 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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23 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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24 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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25 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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26 * POSSIBILITY OF SUCH DAMAGE.
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27 *
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28 */
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29
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30 #include "rules.h"
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31 #include "rook.h"
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32
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33 _Bool rook_chkrules(Move *move) {
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34 return move->torow == move->fromrow || move->tofile == move->fromfile;
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35 }
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36
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37 _Bool rook_isblocked(GameState *gamestate, Move *move) {
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39 if (move->torow == move->fromrow) {
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40 int d = move->tofile > move->fromfile ? 1 : -1;
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41 uint8_t f = move->fromfile;
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42 while (f != move->tofile-d) {
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43 f += d;
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44 if (gamestate->board[move->fromrow][f]) {
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45 return 1;
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46 }
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47 }
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48 } else {
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49 int d = move->torow > move->fromrow ? 1 : -1;
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50 uint8_t r = move->fromrow;
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51 while (r != move->torow - d) {
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52 r += d;
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53 if (gamestate->board[r][move->fromfile]) {
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54 return 1;
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55 }
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56 }
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57 }
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59 return 0;
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60 }

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