Mercurial > hg > terminal-chess / annotate
src/chess/knight.c@c76e46970a59 (annotated)
src/chess/knight.c
Wed, 29 Aug 2018 17:05:40 +0200
- author
- Mike Becker <universe@uap-core.de>
- date
- Wed, 29 Aug 2018 17:05:40 +0200
- changeset 67
- c76e46970a59
- parent 55
- 54ea19938d57
- permissions
- -rw-r--r--
verified that checkmate notation does work correctly
| universe@10 | 1 | /* |
| universe@10 | 2 | * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER. |
| universe@10 | 3 | * |
| universe@55 | 4 | * Copyright 2016 Mike Becker. All rights reserved. |
| universe@10 | 5 | * |
| universe@10 | 6 | * Redistribution and use in source and binary forms, with or without |
| universe@10 | 7 | * modification, are permitted provided that the following conditions are met: |
| universe@10 | 8 | * |
| universe@10 | 9 | * 1. Redistributions of source code must retain the above copyright |
| universe@10 | 10 | * notice, this list of conditions and the following disclaimer. |
| universe@10 | 11 | * |
| universe@10 | 12 | * 2. Redistributions in binary form must reproduce the above copyright |
| universe@10 | 13 | * notice, this list of conditions and the following disclaimer in the |
| universe@10 | 14 | * documentation and/or other materials provided with the distribution. |
| universe@10 | 15 | * |
| universe@10 | 16 | * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" |
| universe@10 | 17 | * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
| universe@10 | 18 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
| universe@10 | 19 | * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE |
| universe@10 | 20 | * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR |
| universe@10 | 21 | * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF |
| universe@10 | 22 | * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS |
| universe@10 | 23 | * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN |
| universe@10 | 24 | * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) |
| universe@10 | 25 | * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE |
| universe@10 | 26 | * POSSIBILITY OF SUCH DAMAGE. |
| universe@10 | 27 | * |
| universe@10 | 28 | */ |
| universe@10 | 29 | |
| universe@10 | 30 | #include "knight.h" |
| universe@16 | 31 | #include "rules.h" |
| universe@19 | 32 | #include <stdlib.h> |
| universe@10 | 33 | |
| universe@16 | 34 | _Bool knight_chkrules(Move *move) { |
| universe@16 | 35 | int dx = abs(move->fromfile - move->tofile); |
| universe@16 | 36 | int dy = abs(move->fromrow - move->torow); |
| universe@16 | 37 | |
| universe@16 | 38 | return (dx == 2 && dy == 1) || (dx == 1 && dy == 2); |
| universe@10 | 39 | } |
