/*	$NetBSD: hack.lev.c,v 1.4 1997/10/19 16:58:09 christos Exp $	*/

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

#include <sys/cdefs.h>
#ifndef lint
__RCSID("$NetBSD: hack.lev.c,v 1.4 1997/10/19 16:58:09 christos Exp $");
#endif				/* not lint */

#include <stdlib.h>
#include <unistd.h>
#include "hack.h"
#include "extern.h"
#include "def.mkroom.h"

#ifndef NOWORM
#include	"def.wseg.h"
#endif				/* NOWORM */

boolean         level_exists[MAXLEVEL + 1];

void
savelev(fd, lev)
	int             fd;
	xchar           lev;
{
#ifndef NOWORM
	struct wseg    *wtmp, *wtmp2;
	int tmp;
#endif	/* NOWORM */

	if (fd < 0)
		panic("Save on bad file!");	/* impossible */
	if (lev >= 0 && lev <= MAXLEVEL)
		level_exists[lev] = TRUE;

	bwrite(fd, (char *) &hackpid, sizeof(hackpid));
	bwrite(fd, (char *) &lev, sizeof(lev));
	bwrite(fd, (char *) levl, sizeof(levl));
	bwrite(fd, (char *) &moves, sizeof(long));
	bwrite(fd, (char *) &xupstair, sizeof(xupstair));
	bwrite(fd, (char *) &yupstair, sizeof(yupstair));
	bwrite(fd, (char *) &xdnstair, sizeof(xdnstair));
	bwrite(fd, (char *) &ydnstair, sizeof(ydnstair));
	savemonchn(fd, fmon);
	savegoldchn(fd, fgold);
	savetrapchn(fd, ftrap);
	saveobjchn(fd, fobj);
	saveobjchn(fd, billobjs);
	billobjs = 0;
	save_engravings(fd);
#ifndef QUEST
	bwrite(fd, (char *) rooms, sizeof(rooms));
	bwrite(fd, (char *) doors, sizeof(doors));
#endif	/* QUEST */
	fgold = 0;
	ftrap = 0;
	fmon = 0;
	fobj = 0;
#ifndef NOWORM
	bwrite(fd, (char *) wsegs, sizeof(wsegs));
	for (tmp = 1; tmp < 32; tmp++) {
		for (wtmp = wsegs[tmp]; wtmp; wtmp = wtmp2) {
			wtmp2 = wtmp->nseg;
			bwrite(fd, (char *) wtmp, sizeof(struct wseg));
		}
		wsegs[tmp] = 0;
	}
	bwrite(fd, (char *) wgrowtime, sizeof(wgrowtime));
#endif	/* NOWORM */
}

void
bwrite(fd, loc, num)
	int fd;
	const void     *loc;
	unsigned        num;
{
	if (write(fd, loc, num) != (ssize_t)num)
		panic("cannot write %u bytes to file #%d", num, fd);
}

void
saveobjchn(fd, otmp)
	int fd;
	struct obj     *otmp;
{
	struct obj     *otmp2;
	unsigned        xl;
	int             minusone = -1;

	while (otmp) {
		otmp2 = otmp->nobj;
		xl = otmp->onamelth;
		bwrite(fd, (char *) &xl, sizeof(int));
		bwrite(fd, (char *) otmp, xl + sizeof(struct obj));
		free((char *) otmp);
		otmp = otmp2;
	}
	bwrite(fd, (char *) &minusone, sizeof(int));
}

void
savemonchn(fd, mtmp)
	int fd;
	struct monst   *mtmp;
{
	struct monst   *mtmp2;
	unsigned        xl;
	int             minusone = -1;
	const struct permonst *monbegin = &mons[0];

	bwrite(fd, &monbegin, sizeof(monbegin));

	while (mtmp) {
		mtmp2 = mtmp->nmon;
		xl = mtmp->mxlth + mtmp->mnamelth;
		bwrite(fd, (char *) &xl, sizeof(int));
		bwrite(fd, (char *) mtmp, xl + sizeof(struct monst));
		if (mtmp->minvent)
			saveobjchn(fd, mtmp->minvent);
		free((char *) mtmp);
		mtmp = mtmp2;
	}
	bwrite(fd, (char *) &minusone, sizeof(int));
}

void
savegoldchn(fd, gold)
	int fd;
	struct gold    *gold;
{
	struct gold    *gold2;
	while (gold) {
		gold2 = gold->ngold;
		bwrite(fd, (char *) gold, sizeof(struct gold));
		free((char *) gold);
		gold = gold2;
	}
	bwrite(fd, nul, sizeof(struct gold));
}

void
savetrapchn(fd, trap)
	int fd;
	struct trap    *trap;
{
	struct trap    *trap2;
	while (trap) {
		trap2 = trap->ntrap;
		bwrite(fd, (char *) trap, sizeof(struct trap));
		free((char *) trap);
		trap = trap2;
	}
	bwrite(fd, nul, sizeof(struct trap));
}

void
getlev(fd, pid, lev)
	int             fd, pid;
	xchar           lev;
{
	struct gold    *gold;
	struct trap    *trap;
#ifndef NOWORM
	struct wseg    *wtmp;
#endif	/* NOWORM */
	int		tmp;
	long            omoves;
	int             hpid;
	xchar           dlvl;

	/* First some sanity checks */
	mread(fd, (char *) &hpid, sizeof(hpid));
	mread(fd, (char *) &dlvl, sizeof(dlvl));
	if ((pid && pid != hpid) || (lev && dlvl != lev)) {
		pline("Strange, this map is not as I remember it.");
		pline("Somebody is trying some trickery here ...");
		pline("This game is void ...");
		done("tricked");
	}
	fgold = 0;
	ftrap = 0;
	mread(fd, (char *) levl, sizeof(levl));
	mread(fd, (char *) &omoves, sizeof(omoves));
	mread(fd, (char *) &xupstair, sizeof(xupstair));
	mread(fd, (char *) &yupstair, sizeof(yupstair));
	mread(fd, (char *) &xdnstair, sizeof(xdnstair));
	mread(fd, (char *) &ydnstair, sizeof(ydnstair));

	fmon = restmonchn(fd);

	/* regenerate animals while on another level */
	{
		long            tmoves = (moves > omoves) ? moves - omoves : 0;
		struct monst   *mtmp, *mtmp2;

		for (mtmp = fmon; mtmp; mtmp = mtmp2) {
			long            newhp;	/* tmoves may be very large */

			mtmp2 = mtmp->nmon;
			if (strchr(genocided, mtmp->data->mlet)) {
				mondead(mtmp);
				continue;
			}
			if (mtmp->mtame && tmoves > 250) {
				mtmp->mtame = 0;
				mtmp->mpeaceful = 0;
			}
			newhp = mtmp->mhp +
				(strchr(MREGEN, mtmp->data->mlet) ? tmoves : tmoves / 20);
			if (newhp > mtmp->mhpmax)
				mtmp->mhp = mtmp->mhpmax;
			else
				mtmp->mhp = newhp;
		}
	}

	setgd();
	gold = newgold();
	mread(fd, (char *) gold, sizeof(struct gold));
	while (gold->gx) {
		gold->ngold = fgold;
		fgold = gold;
		gold = newgold();
		mread(fd, (char *) gold, sizeof(struct gold));
	}
	free((char *) gold);
	trap = newtrap();
	mread(fd, (char *) trap, sizeof(struct trap));
	while (trap->tx) {
		trap->ntrap = ftrap;
		ftrap = trap;
		trap = newtrap();
		mread(fd, (char *) trap, sizeof(struct trap));
	}
	free((char *) trap);
	fobj = restobjchn(fd);
	billobjs = restobjchn(fd);
	rest_engravings(fd);
#ifndef QUEST
	mread(fd, (char *) rooms, sizeof(rooms));
	mread(fd, (char *) doors, sizeof(doors));
#endif	/* QUEST */
#ifndef NOWORM
	mread(fd, (char *) wsegs, sizeof(wsegs));
	for (tmp = 1; tmp < 32; tmp++)
		if (wsegs[tmp]) {
			wheads[tmp] = wsegs[tmp] = wtmp = newseg();
			while (1) {
				mread(fd, (char *) wtmp, sizeof(struct wseg));
				if (!wtmp->nseg)
					break;
				wheads[tmp]->nseg = wtmp = newseg();
				wheads[tmp] = wtmp;
			}
		}
	mread(fd, (char *) wgrowtime, sizeof(wgrowtime));
#endif	/* NOWORM */
}

void
mread(fd, buf, len)
	int fd;
	char           *buf;
	unsigned        len;
{
	int             rlen;

	rlen = read(fd, buf, (int) len);
	if (rlen != (int)len) {
		pline("Read %d instead of %u bytes.\n", rlen, len);
		if (restoring) {
			(void) unlink(SAVEF);
			error("Error restoring old game.");
		}
		panic("Error reading level file.");
	}
}

void
mklev()
{
	if (getbones())
		return;

	in_mklev = TRUE;
	makelevel();
	in_mklev = FALSE;
}