/*	$NetBSD: hack.save.c,v 1.6 1997/10/19 16:58:57 christos Exp $	*/

/*
 * Copyright (c) Stichting Mathematisch Centrum, Amsterdam, 1985.
 */

#include <sys/cdefs.h>
#ifndef lint
__RCSID("$NetBSD: hack.save.c,v 1.6 1997/10/19 16:58:57 christos Exp $");
#endif				/* not lint */

#include <signal.h>
#include <stdlib.h>
#include <unistd.h>
#include <fcntl.h>
#include "hack.h"
#include "extern.h"


int
dosave()
{
	if (dosave0(0)) {
		settty("Be seeing you ...\n");
		exit(0);
	}
	return (0);
}

#ifndef NOSAVEONHANGUP
void
hangup(n)
	int n;
{
	(void) dosave0(1);
	exit(1);
}
#endif	/* NOSAVEONHANGUP */

/* returns 1 if save successful */
int
dosave0(hu)
	int             hu;
{
	int		fd, ofd;
	int             tmp;	/* not ! */

	(void) signal(SIGHUP, SIG_IGN);
	(void) signal(SIGINT, SIG_IGN);
	if ((fd = creat(SAVEF, FMASK)) < 0) {
		if (!hu)
			pline("Cannot open save file. (Continue or Quit)");
		(void) unlink(SAVEF);	/* ab@unido */
		return (0);
	}
	if (flags.moonphase == FULL_MOON)	/* ut-sally!fletcher */
		u.uluck--;	/* and unido!ab */
	savelev(fd, dlevel);
	saveobjchn(fd, invent);
	saveobjchn(fd, fcobj);
	savemonchn(fd, fallen_down);
	tmp = getuid();
	bwrite(fd, (char *) &tmp, sizeof tmp);
	bwrite(fd, (char *) &flags, sizeof(struct flag));
	bwrite(fd, (char *) &dlevel, sizeof dlevel);
	bwrite(fd, (char *) &maxdlevel, sizeof maxdlevel);
	bwrite(fd, (char *) &moves, sizeof moves);
	bwrite(fd, (char *) &u, sizeof(struct you));
	if (u.ustuck)
		bwrite(fd, (char *) &(u.ustuck->m_id), sizeof u.ustuck->m_id);
	bwrite(fd, (char *) pl_character, sizeof pl_character);
	bwrite(fd, (char *) genocided, sizeof genocided);
	bwrite(fd, (char *) fut_geno, sizeof fut_geno);
	savenames(fd);
	for (tmp = 1; tmp <= maxdlevel; tmp++) {

		if (tmp == dlevel || !level_exists[tmp])
			continue;
		glo(tmp);
		if ((ofd = open(lock, 0)) < 0) {
			if (!hu)
				pline("Error while saving: cannot read %s.", lock);
			(void) close(fd);
			(void) unlink(SAVEF);
			if (!hu)
				done("tricked");
			return (0);
		}
		getlev(ofd, hackpid, tmp);
		(void) close(ofd);
		bwrite(fd, (char *) &tmp, sizeof tmp);	/* level number */
		savelev(fd, tmp);	/* actual level */
		(void) unlink(lock);
	}
	(void) close(fd);
	glo(dlevel);
	(void) unlink(lock);	/* get rid of current level --jgm */
	glo(0);
	(void) unlink(lock);
	return (1);
}

int
dorecover(fd)
	int fd;
{
	int nfd;
	int             tmp;	/* not a ! */
	unsigned        mid;	/* idem */
	struct obj     *otmp;

	restoring = TRUE;
	getlev(fd, 0, 0);
	invent = restobjchn(fd);
	for (otmp = invent; otmp; otmp = otmp->nobj)
		if (otmp->owornmask)
			setworn(otmp, otmp->owornmask);
	fcobj = restobjchn(fd);
	fallen_down = restmonchn(fd);
	mread(fd, (char *) &tmp, sizeof tmp);
	if (tmp != getuid()) {	/* strange ... */
		(void) close(fd);
		(void) unlink(SAVEF);
		puts("Saved game was not yours.");
		restoring = FALSE;
		return (0);
	}
	mread(fd, (char *) &flags, sizeof(struct flag));
	mread(fd, (char *) &dlevel, sizeof dlevel);
	mread(fd, (char *) &maxdlevel, sizeof maxdlevel);
	mread(fd, (char *) &moves, sizeof moves);
	mread(fd, (char *) &u, sizeof(struct you));
	if (u.ustuck)
		mread(fd, (char *) &mid, sizeof mid);
	mread(fd, (char *) pl_character, sizeof pl_character);
	mread(fd, (char *) genocided, sizeof genocided);
	mread(fd, (char *) fut_geno, sizeof fut_geno);
	restnames(fd);
	while (1) {
		if (read(fd, (char *) &tmp, sizeof tmp) != sizeof tmp)
			break;
		getlev(fd, 0, tmp);
		glo(tmp);
		if ((nfd = creat(lock, FMASK)) < 0)
			panic("Cannot open temp file %s!\n", lock);
		savelev(nfd, tmp);
		(void) close(nfd);
	}
	(void) lseek(fd, (off_t) 0, 0);
	getlev(fd, 0, 0);
	(void) close(fd);
	(void) unlink(SAVEF);
	if (Punished) {
		for (otmp = fobj; otmp; otmp = otmp->nobj)
			if (otmp->olet == CHAIN_SYM)
				goto chainfnd;
		panic("Cannot find the iron chain?");
chainfnd:
		uchain = otmp;
		if (!uball) {
			for (otmp = fobj; otmp; otmp = otmp->nobj)
				if (otmp->olet == BALL_SYM && otmp->spe)
					goto ballfnd;
			panic("Cannot find the iron ball?");
	ballfnd:
			uball = otmp;
		}
	}
	if (u.ustuck) {
		struct monst   *mtmp;

		for (mtmp = fmon; mtmp; mtmp = mtmp->nmon)
			if (mtmp->m_id == mid)
				goto monfnd;
		panic("Cannot find the monster ustuck.");
monfnd:
		u.ustuck = mtmp;
	}
#ifndef QUEST
	setsee();		/* only to recompute seelx etc. - these
				 * weren't saved */
#endif	/* QUEST */
	docrt();
	restoring = FALSE;
	return (1);
}

struct obj     *
restobjchn(fd)
	int fd;
{
	struct obj     *otmp, *otmp2 = NULL;
	struct obj     *first = 0;
	int             xl;
	while (1) {
		mread(fd, (char *) &xl, sizeof(xl));
		if (xl == -1)
			break;
		otmp = newobj(xl);
		if (!first)
			first = otmp;
		else
			otmp2->nobj = otmp;
		mread(fd, (char *) otmp, (unsigned) xl + sizeof(struct obj));
		if (!otmp->o_id)
			otmp->o_id = flags.ident++;
		otmp2 = otmp;
	}
	if (first && otmp2->nobj) {
		impossible("Restobjchn: error reading objchn.");
		otmp2->nobj = 0;
	}
	return (first);
}

struct monst   *
restmonchn(fd)
	int fd;
{
	struct monst   *mtmp, *mtmp2 = NULL;
	struct monst   *first = 0;
	int             xl;

	struct permonst *monbegin;
	long            differ;

	mread(fd, (char *) &monbegin, sizeof(monbegin));
	differ = (char *) (&mons[0]) - (char *) (monbegin);

#ifdef lint
	/* suppress "used before set" warning from lint */
	mtmp2 = 0;
#endif	/* lint */
	while (1) {
		mread(fd, (char *) &xl, sizeof(xl));
		if (xl == -1)
			break;
		mtmp = newmonst(xl);
		if (!first)
			first = mtmp;
		else
			mtmp2->nmon = mtmp;
		mread(fd, (char *) mtmp, (unsigned) xl + sizeof(struct monst));
		if (!mtmp->m_id)
			mtmp->m_id = flags.ident++;
		mtmp->data = (struct permonst *)
			((char *) mtmp->data + differ);
		if (mtmp->minvent)
			mtmp->minvent = restobjchn(fd);
		mtmp2 = mtmp;
	}
	if (first && mtmp2->nmon) {
		impossible("Restmonchn: error reading monchn.");
		mtmp2->nmon = 0;
	}
	return (first);
}