Thu, 17 Apr 2014 11:41:02 +0200
surrender is now resign
/* * 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 "pawn.h" #include "rules.h" _Bool pawn_chkrules(GameState *gamestate, Move *move) { int8_t d = ((move->piece & COLOR_MASK) == WHITE ? -1 : 1); if (move->torow == (d < 0 ? 7 : 0)) { if (move->promotion) { uint8_t promopiece = move->promotion & PIECE_MASK; if (!promopiece || promopiece == PAWN || promopiece == KING) { return 0; } } else { return 0; } } else { if (move->promotion) { return 0; } } if (move->capture) { if (move->fromrow == move->torow + d && ( move->fromfile == move->tofile + 1 || move->fromfile == move->tofile - 1)) { return mdst(gamestate->board, move) || (gamestate->board[move->fromrow][move->tofile] & ENPASSANT_THREAT); } else { return 0; } } else { if (move->fromfile == move->tofile) { return (move->fromrow == move->torow + d) || (move->fromrow == (d < 0 ? 1 : 6) && /* advanced first move */ move->fromrow == move->torow + d*2); } else { return 0; } } } _Bool pawn_isblocked(GameState *gamestate, Move *move) { return mdst(gamestate->board, move) && !move->capture; } int pawn_getlocation(GameState *gamestate, Move *move) { int8_t d = ((move->piece & COLOR_MASK) == WHITE ? -1 : 1); if (move->fromfile == POS_UNSPECIFIED) { move->fromfile = move->tofile; } move->fromrow = move->torow + d; if (move->fromrow > 6) { return INVALID_POSITION; } else { /* advanced first move */ if (move->fromrow == (d < 0 ? 2 : 5) && msrc(gamestate->board,move) != move->piece) { move->fromrow += d; if (move->fromrow > 6) { return INVALID_POSITION; } } } return VALID_MOVE_SYNTAX; }