/*      $NetBSD: dr_main.c,v 1.15 2010/08/06 09:14:40 dholland 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 <sys/cdefs.h>
#ifndef lint
#if 0
static char sccsid[] = "@(#)dr_main.c   8.2 (Berkeley) 4/16/94";
#else
__RCSID("$NetBSD: dr_main.c,v 1.15 2010/08/06 09:14:40 dholland Exp $");
#endif
#endif /* not lint */

#include <err.h>
#include <setjmp.h>
#include <signal.h>
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include "extern.h"
#include "driver.h"
#include "player.h" /* XXX for LEAVE_FORK */
#include "restart.h"

static int driver_wait_fd = -1;

int
dr_main(void)
{
       int n;
       struct ship *sp;
       int nat[NNATION];
       int value = 0;

       /*
        * XXX need a way to print diagnostics back to the player
        * process instead of stomping on the curses screen.
        */

       signal(SIGINT, SIG_IGN);
       signal(SIGQUIT, SIG_IGN);
       signal(SIGTSTP, SIG_IGN);
       if (game < 0 || game >= NSCENE) {
               errx(1, "\ndriver: Bad game number %d", game);
       }
       cc = &scene[game];
       ls = SHIP(cc->vessels);
       if (sync_open() < 0) {
               err(1, "\ndriver: syncfile");
       }
       for (n = 0; n < NNATION; n++)
               nat[n] = 0;
       foreachship(sp) {
               if (sp->file == NULL &&
                   (sp->file = calloc(1, sizeof (struct File))) == NULL) {
                       fprintf(stderr, "\nDRIVER: Out of memory.\n");
                       exit(1);
               }
               sp->file->index = sp - SHIP(0);
               sp->file->loadL = L_ROUND;
               sp->file->loadR = L_ROUND;
               sp->file->readyR = R_LOADED|R_INITIAL;
               sp->file->readyL = R_LOADED|R_INITIAL;
               sp->file->stern = nat[sp->nationality]++;
               sp->file->dir = sp->shipdir;
               sp->file->row = sp->shiprow;
               sp->file->col = sp->shipcol;
       }
       windspeed = cc->windspeed;
       winddir = cc->winddir;
       people = 0;

       /* report back to the player process that we've started */
       if (driver_wait_fd >= 0) {
               close(driver_wait_fd);
       }

       for (;;) {
               sleep(7);
               if (Sync() < 0) {
                       value = 1;
                       break;
               }
               if (next() < 0)
                       break;
               unfoul();
               checkup();
               prizecheck();
               moveall();
               thinkofgrapples();
               boardcomp();
               compcombat();
               resolve();
               reload();
               checksails();
               if (Sync() < 0) {
                       value = 1;
                       break;
               }
       }
       sync_close(1);
       return value;
}

void
startdriver(void)
{
       int fds[2];
       char c;

       if (pipe(fds)) {
               warn("pipe");
               leave(LEAVE_FORK);
               return;
       }

       switch (fork()) {
           case 0:
               close(fds[0]);
               driver_wait_fd = fds[1];
               longjmp(restart, MODE_DRIVER);
               /*NOTREACHED*/
           case -1:
               warn("fork");
               close(fds[0]);
               close(fds[1]);
               leave(LEAVE_FORK);
               break;
           default:
               hasdriver++;
               close(fds[1]);
               read(fds[0], &c, 1);
               close(fds[0]);
       }
}