main.c

/* main.c
 *
 * This file is part of ice.
 *
 * ice is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * ice is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with ice.  If not, see <http://www.gnu.org/licenses/>.
 *
 * Copyright (c) 2010 Michael Forney
 * Copyright (c) 2010 Sam Whitlock
 */

#include <stdio.h>

#include "ice.h"
#include "pbm.h"

const char help_text[] =
    "Usage: %s start.pbm end.pbm\n"
    "\tThis program will output a series of valid moves to get to the end\n"
    "\tconfiguration from the start configuration. If this is impossible, the\n"
    "\tprogram will simply output \"IMPOSSIBLE\".\n";
#define print_state_prefetch_locality 3
int main(int argc, char * argv[])
{
    uint32_t * start_state;
    uint32_t * end_state;
    int start_width, start_height, start_ones, end_ones, end_width, end_height;

    if (argc != 3)
    {
        printf(help_text, argv[0]);
        return 1;
    }

    /* Read the PBMs */
    read_pbm(argv[1], &start_state, &start_width, &start_height, &start_ones);
    read_pbm(argv[2], &end_state, &end_width, &end_height, &end_ones);

    if (start_ones != end_ones || start_width != end_width || start_height != end_height)
    {
        puts("IMPOSSIBLE");
        return 0;
    }

    state_width = start_width;
    state_height = start_height;
    state_ones = start_ones;

    find_path(start_state, end_state);

    free(start_state);
    free(end_state);

    return 0;
}