/*      @(#)save.c      8.1 (Berkeley) 5/31/93                          */
/*      $NetBSD: save.c,v 1.16 2012/10/13 19:19:39 dholland Exp $       */

/*
 * Copyright (c) 1980, 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 <errno.h>

#include "back.h"

static const char confirm[] = "Are you sure you want to leave now?";
static const char prompt[] = "Enter a file name:  ";
static const char exist1[] = "The file '";
static const char exist2[] =
"' already exists.\nAre you sure you want to use this file?";
static const char cantuse[] = "\nCan't use ";
static const char saved[] = "This game has been saved on the file '";
static const char type[] = "'.\nType \"backgammon ";
static const char rec[] = "\" to recover your game.\n\n";
static const char cantrec[] = "Can't recover file:  ";

static void norec(const char *) __dead2;

void
save(struct move *mm, int n)
{
        int     fdesc;
        char   *fs;
        char    fname[50];

        if (n) {
                if (tflag) {
                        curmove(20, 0);
                        clend();
                } else
                        writec('\n');
                writel(confirm);
                if (!yorn(0))
                        return;
        }
        cflag = 1;
        for (;;) {
                writel(prompt);
                fs = fname;
                while ((*fs = readc()) != '\n') {
                        if (*fs == old.c_cc[VERASE]) {
                                if (fs > fname) {
                                        fs--;
                                        if (tflag)
                                                curmove(curr, curc - 1);
                                        else
                                                writec(*fs);
                                } else
                                        writec('\007');
                                continue;
                        }
                        writec(*fs++);
                }
                *fs = '\0';
                if ((fdesc = open(fname, O_RDWR)) == -1 && errno == ENOENT) {
                        if ((fdesc = creat(fname, 0600)) != -1)
                                break;
                }
                if (fdesc != -1) {
                        if (tflag) {
                                curmove(18, 0);
                                clend();
                        } else
                                writec('\n');
                        writel(exist1);
                        writel(fname);
                        writel(exist2);
                        cflag = 0;
                        close(fdesc);
                        if (yorn(0)) {
                                unlink(fname);
                                fdesc = creat(fname, 0600);
                                break;
                        } else {
                                cflag = 1;
                                continue;
                        }
                }
                writel(cantuse);
                writel(fname);
                writel(".\n");
                cflag = 1;
        }
        write(fdesc, board, sizeof board);
        write(fdesc, off, sizeof off);
        write(fdesc, in, sizeof in);
        write(fdesc, mm->dice, sizeof mm->dice);
        write(fdesc, &cturn, sizeof cturn);
        write(fdesc, &dlast, sizeof dlast);
        write(fdesc, &pnum, sizeof pnum);
        write(fdesc, &rscore, sizeof rscore);
        write(fdesc, &wscore, sizeof wscore);
        write(fdesc, &gvalue, sizeof gvalue);
        write(fdesc, &raflag, sizeof raflag);
        close(fdesc);
        if (tflag)
                curmove(18, 0);
        writel(saved);
        writel(fname);
        writel(type);
        writel(fname);
        writel(rec);
        if (tflag)
                clend();
        getout(0);
}

void
recover(struct move *mm, const char *s)
{
        int     fdesc;

        if ((fdesc = open(s, O_RDONLY)) == -1)
                norec(s);
        read(fdesc, board, sizeof board);
        read(fdesc, off, sizeof off);
        read(fdesc, in, sizeof in);
        read(fdesc, mm->dice, sizeof mm->dice);
        read(fdesc, &cturn, sizeof cturn);
        read(fdesc, &dlast, sizeof dlast);
        read(fdesc, &pnum, sizeof pnum);
        read(fdesc, &rscore, sizeof rscore);
        read(fdesc, &wscore, sizeof wscore);
        read(fdesc, &gvalue, sizeof gvalue);
        read(fdesc, &raflag, sizeof raflag);
        close(fdesc);
        rflag = 1;
}

static void
norec(const char *s)
{
        const char   *c;

        tflag = 0;
        writel(cantrec);
        c = s;
        while (*c != '\0')
                writec(*c++);
        getout(0);
}