Wed, 16 Apr 2014 22:20:59 +0200
changed netcode numbers
/* * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER. * * Copyright 2014 Mike Becker. All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions are met: * * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE * POSSIBILITY OF SUCH DAMAGE. * */ #include "knight.h" #include "rules.h" #include <stdlib.h> _Bool knight_chkrules(Move *move) { int dx = abs(move->fromfile - move->tofile); int dy = abs(move->fromrow - move->torow); return (dx == 2 && dy == 1) || (dx == 1 && dy == 2); } static int knight_getloc_fixedrow(GameState *gamestate, Move *move) { int d = 3 - abs(move->fromrow - move->torow); if (d == 1 || d == 2) { if (move->tofile < 6 && gamestate->board[move->fromrow][move->tofile + d] == move->piece) { if (move->fromfile == POS_UNSPECIFIED) { move->fromfile = move->tofile + d; return VALID_MOVE_SYNTAX; } else { return AMBIGUOUS_MOVE; } } if (move->tofile > 1 && gamestate->board[move->fromrow][move->tofile - d] == move->piece) { if (move->fromfile == POS_UNSPECIFIED) { move->fromfile = move->tofile - d; return VALID_MOVE_SYNTAX; } else { return AMBIGUOUS_MOVE; } } } return INVALID_POSITION; } static int knight_getloc_fixedfile(GameState *gamestate, Move *move) { int d = 3 - abs(move->fromfile - move->tofile); if (d == 1 || d == 2) { if (move->torow < 6 && gamestate->board[move->torow + d][move->fromfile] == move->piece) { if (move->fromrow == POS_UNSPECIFIED) { move->fromrow = move->torow + d; return VALID_MOVE_SYNTAX; } else { return AMBIGUOUS_MOVE; } } if (move->torow > 1 && gamestate->board[move->torow - d][move->fromfile] == move->piece) { if (move->fromrow == POS_UNSPECIFIED) { move->fromrow = move->torow - d; return VALID_MOVE_SYNTAX; } else { return AMBIGUOUS_MOVE; } } } return INVALID_POSITION; } int knight_getlocation(GameState *gamestate, Move *move) { if (move->fromfile != POS_UNSPECIFIED) { return knight_getloc_fixedfile(gamestate, move); } if (move->fromrow != POS_UNSPECIFIED) { return knight_getloc_fixedrow(gamestate, move); } for (int x = -2 ; x <= 2 ; x++) { if (x == 0) { continue; } for (int y = -2 ; y <= 2 ; y++) { if (y == 0 || y == x) { continue; } uint8_t cx = move->tofile + x; uint8_t cy = move->torow + y; if (isidx(cx) && isidx(cy) && gamestate->board[cy][cx] == move->piece) { if (move->fromfile == POS_UNSPECIFIED && move->fromrow == POS_UNSPECIFIED) { move->fromfile = cx; move->fromrow = cy; } else { return AMBIGUOUS_MOVE; } } } } if (move->fromfile == POS_UNSPECIFIED || move->fromrow == POS_UNSPECIFIED) { return INVALID_POSITION; } else { return VALID_MOVE_SYNTAX; } }