src/rules/pawn.c

/*
 * 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
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 */

#include "pawn.h"

_Bool pawn_chkrules(Board board, Move *move) {
    // TODO: implement
    return TRUE;
}

_Bool pawn_isblocked(Board board, Move *move) {
    // TODO: implement
    return FALSE;
}

_Bool pawn_getlocation(Board board, Move *move) {
    int8_t d = ((move->piece & COLOR_MASK) == WHITE ? -1 : 1);
    
    move->fromfile = move->tofile;
    move->fromrow = move->torow + d;
    if (move->fromrow > 6) {
        return FALSE;
    } else {
        /* advanced first move */
        if (move->fromrow == (d < 0 ? 2 : 5) &&
            board[move->fromrow][move->fromfile] != move->piece) {

            move->fromrow += d;
            if (move->fromrow > 6) {
                return FALSE;
            }
        }
    }
    return TRUE;
}