/*      $OpenBSD: save.c,v 1.14 2022/08/08 17:57:05 op Exp $    */
/*      $NetBSD: save.c,v 1.3 1995/03/21 15:07:57 cgd Exp $     */

/*
 * Copyright (c) 1983, 1993
 *      The Regents of the University of California.  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.
 * 3. Neither the name of the University nor the names of its contributors
 *    may be used to endorse or promote products derived from this software
 *    without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE REGENTS 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 REGENTS 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 <err.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>

#include "extern.h"

void
restore(const char *filename)
{
        int     n;
        int     tmp;
        FILE   *fp;

        if (filename == NULL)
                exit(1); /* Error determining save file name.  */
        if ((fp = fopen(filename, "r")) == NULL)
                err(1, "can't open %s for reading", filename);
        fread(&WEIGHT, sizeof WEIGHT, 1, fp);
        fread(&CUMBER, sizeof CUMBER, 1, fp);
        fread(&ourclock, sizeof ourclock, 1, fp);
        fread(&tmp, sizeof tmp, 1, fp);
        location = tmp ? dayfile : nightfile;
        for (n = 1; n <= NUMOFROOMS; n++) {
                fread(location[n].link, sizeof location[n].link, 1, fp);
                fread(location[n].objects, sizeof location[n].objects, 1, fp);
        }
        fread(inven, sizeof inven, 1, fp);
        fread(wear, sizeof wear, 1, fp);
        fread(injuries, sizeof injuries, 1, fp);
        fread(notes, sizeof notes, 1, fp);
        fread(&direction, sizeof direction, 1, fp);
        fread(&position, sizeof position, 1, fp);
        fread(&ourtime, sizeof ourtime, 1, fp);
        fread(&fuel, sizeof fuel, 1, fp);
        fread(&torps, sizeof torps, 1, fp);
        fread(&carrying, sizeof carrying, 1, fp);
        fread(&encumber, sizeof encumber, 1, fp);
        fread(&rythmn, sizeof rythmn, 1, fp);
        fread(&followfight, sizeof followfight, 1, fp);
        fread(&ate, sizeof ate, 1, fp);
        fread(&snooze, sizeof snooze, 1, fp);
        fread(&meetgirl, sizeof meetgirl, 1, fp);
        fread(&followgod, sizeof followgod, 1, fp);
        fread(&godready, sizeof godready, 1, fp);
        fread(&win, sizeof win, 1, fp);
        fread(&wintime, sizeof wintime, 1, fp);
        fread(&matchlight, sizeof matchlight, 1, fp);
        fread(&matchcount, sizeof matchcount, 1, fp);
        fread(&loved, sizeof loved, 1, fp);
        fread(&pleasure, sizeof pleasure, 1, fp);
        fread(&power, sizeof power, 1, fp);
        /* Check the final read in case file was truncated */
        if (fread(&ego, sizeof ego, 1, fp) < 1)
                errx(1, "save file %s is truncated", filename);
        fclose(fp);
}

void
save(const char *filename)
{
        int     n;
        int     tmp;
        FILE   *fp;

        if (filename == NULL)
                return; /* Error determining save file name.  */
        if ((fp = fopen(filename, "w")) == NULL) {
                warn("can't open %s for writing", filename);
                return;
        }
        fwrite(&WEIGHT, sizeof WEIGHT, 1, fp);
        fwrite(&CUMBER, sizeof CUMBER, 1, fp);
        fwrite(&ourclock, sizeof ourclock, 1, fp);
        tmp = location == dayfile;
        fwrite(&tmp, sizeof tmp, 1, fp);
        for (n = 1; n <= NUMOFROOMS; n++) {
                fwrite(location[n].link, sizeof location[n].link, 1, fp);
                fwrite(location[n].objects, sizeof location[n].objects, 1, fp);
        }
        fwrite(inven, sizeof inven, 1, fp);
        fwrite(wear, sizeof wear, 1, fp);
        fwrite(injuries, sizeof injuries, 1, fp);
        fwrite(notes, sizeof notes, 1, fp);
        fwrite(&direction, sizeof direction, 1, fp);
        fwrite(&position, sizeof position, 1, fp);
        fwrite(&ourtime, sizeof ourtime, 1, fp);
        fwrite(&fuel, sizeof fuel, 1, fp);
        fwrite(&torps, sizeof torps, 1, fp);
        fwrite(&carrying, sizeof carrying, 1, fp);
        fwrite(&encumber, sizeof encumber, 1, fp);
        fwrite(&rythmn, sizeof rythmn, 1, fp);
        fwrite(&followfight, sizeof followfight, 1, fp);
        fwrite(&ate, sizeof ate, 1, fp);
        fwrite(&snooze, sizeof snooze, 1, fp);
        fwrite(&meetgirl, sizeof meetgirl, 1, fp);
        fwrite(&followgod, sizeof followgod, 1, fp);
        fwrite(&godready, sizeof godready, 1, fp);
        fwrite(&win, sizeof win, 1, fp);
        fwrite(&wintime, sizeof wintime, 1, fp);
        fwrite(&matchlight, sizeof matchlight, 1, fp);
        fwrite(&matchcount, sizeof matchcount, 1, fp);
        fwrite(&loved, sizeof loved, 1, fp);
        fwrite(&pleasure, sizeof pleasure, 1, fp);
        fwrite(&power, sizeof power, 1, fp);
        fwrite(&ego, sizeof ego, 1, fp);
        fflush(fp);
        if (ferror(fp))
                warn("fwrite %s", filename);
        else
                printf("Saved in %s.\n", filename);
        fclose(fp);
}

/*
 * Given a save file name determine the name of the file to be saved
 * to by adding the HOME directory if the name does not contain a
 * slash.  Name will be allocated with malloc(3).
 */
char *
save_file_name(const char *filename)
{
        char   *home;
        char   *newname;

        home = getenv("HOME");
        if (strchr(filename, '/') != NULL || home == NULL) {
                if ((newname = strdup(filename)) == NULL)
                        warnx("out of memory");
                return(newname);
        }

        if (asprintf(&newname, "%s/%s", home, filename) == -1) {
                warnx("out of memory");
                return(NULL);
        }
        return(newname);
}