Wed, 29 Aug 2018 17:31:36 +0200
error message when syntactically validating a King's move into a check position is now correct
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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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38 | |
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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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58 | |
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59 | return 0; |
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60 | } |