Source:NetHack 3.4.3/src/restore.c

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/*	SCCS Id: @(#)restore.c	3.4	2003/09/06	*/
/* Copyright (c) Stichting Mathematisch Centrum, Amsterdam, 1985. */
/* NetHack may be freely redistributed.  See license for details. */

The NetHack General Public License applies to screenshots, source code and other content from NetHack.

This content was modified from the original NetHack source code distribution (by splitting up NetHack content between wiki pages, and possibly further editing). See the page history for a list of who changed it, and on what dates.

#include "hack.h"
#include "lev.h"
#include "tcap.h" /* for TERMLIB and ASCIIGRAPH */

#if defined(MICRO)
extern int dotcnt;	/* shared with save */
extern int dotrow;	/* shared with save */
#endif

#ifdef USE_TILES
extern void FDECL(substitute_tiles, (d_level *));       /* from tile.c */
#endif

#ifdef ZEROCOMP
static int NDECL(mgetc);
#endif
STATIC_DCL void NDECL(find_lev_obj);
STATIC_DCL void FDECL(restlevchn, (int));
STATIC_DCL void FDECL(restdamage, (int,BOOLEAN_P));
STATIC_DCL struct obj *FDECL(restobjchn, (int,BOOLEAN_P,BOOLEAN_P));
STATIC_DCL struct monst *FDECL(restmonchn, (int,BOOLEAN_P));
STATIC_DCL struct fruit *FDECL(loadfruitchn, (int));
STATIC_DCL void FDECL(freefruitchn, (struct fruit *));
STATIC_DCL void FDECL(ghostfruit, (struct obj *));
STATIC_DCL boolean FDECL(restgamestate, (int, unsigned int *, unsigned int *));
STATIC_DCL void FDECL(restlevelstate, (unsigned int, unsigned int));
STATIC_DCL int FDECL(restlevelfile, (int,XCHAR_P));
STATIC_DCL void FDECL(reset_oattached_mids, (BOOLEAN_P));

/*
* Save a mapping of IDs from ghost levels to the current level.  This
* map is used by the timer routines when restoring ghost levels.
*/
#define N_PER_BUCKET 64
struct bucket {
struct bucket *next;
struct {
	unsigned gid;	/* ghost ID */
	unsigned nid;	/* new ID */
} map[N_PER_BUCKET];
};

STATIC_DCL void NDECL(clear_id_mapping);
STATIC_DCL void FDECL(add_id_mapping, (unsigned, unsigned));

static int n_ids_mapped = 0;
static struct bucket *id_map = 0;


#ifdef AMII_GRAPHICS
void FDECL( amii_setpens, (int) );	/* use colors from save file */
extern int amii_numcolors;
#endif

#include "quest.h"

boolean restoring = FALSE;
static NEARDATA struct fruit *oldfruit;
static NEARDATA long omoves;

#define Is_IceBox(o) ((o)->otyp == ICE_BOX ? TRUE : FALSE)

find_lev_obj

/* Recalculate level.objects[x][y], since this info was not saved. */
STATIC_OVL void
find_lev_obj()
{
	register struct obj *fobjtmp = (struct obj *)0;
	register struct obj *otmp;
	int x,y;

	for(x=0; x<COLNO; x++) for(y=0; y<ROWNO; y++)
		level.objects[x][y] = (struct obj *)0;

	/*
	 * Reverse the entire fobj chain, which is necessary so that we can
	 * place the objects in the proper order.  Make all obj in chain
	 * OBJ_FREE so place_object will work correctly.
	 */
	while ((otmp = fobj) != 0) {
		fobj = otmp->nobj;
		otmp->nobj = fobjtmp;
		otmp->where = OBJ_FREE;
		fobjtmp = otmp;
	}
	/* fobj should now be empty */

	/* Set level.objects (as well as reversing the chain back again) */
	while ((otmp = fobjtmp) != 0) {
		fobjtmp = otmp->nobj;
		place_object(otmp, otmp->ox, otmp->oy);
	}
}

inven_inuse

/* Things that were marked "in_use" when the game was saved (ex. via the
* infamous "HUP" cheat) get used up here.
*/
void
inven_inuse(quietly)
boolean quietly;
{
	register struct obj *otmp, *otmp2;

	for (otmp = invent; otmp; otmp = otmp2) {
	    otmp2 = otmp->nobj;
#ifndef GOLDOBJ
	    if (otmp->oclass == COIN_CLASS) {
		/* in_use gold is created by some menu operations */
		if (!otmp->in_use) {
		    impossible("inven_inuse: !in_use gold in inventory");
		}
		extract_nobj(otmp, &invent);
		otmp->in_use = FALSE;
		dealloc_obj(otmp);
	    } else
#endif /* GOLDOBJ */
	    if (otmp->in_use) {
		if (!quietly) pline("Finishing off %s...", xname(otmp));
		useup(otmp);
	    }
	}
}

restlevchn

STATIC_OVL void
restlevchn(fd)
register int fd;
{
	int cnt;
	s_level	*tmplev, *x;

	sp_levchn = (s_level *) 0;
	mread(fd, (genericptr_t) &cnt, sizeof(int));
	for(; cnt > 0; cnt--) {

	    tmplev = (s_level *)alloc(sizeof(s_level));
	    mread(fd, (genericptr_t) tmplev, sizeof(s_level));
	    if(!sp_levchn) sp_levchn = tmplev;
	    else {

		for(x = sp_levchn; x->next; x = x->next);
		x->next = tmplev;
	    }
	    tmplev->next = (s_level *)0;
	}
}

restdamage

STATIC_OVL void
restdamage(fd, ghostly)
int fd;
boolean ghostly;
{
	int counter;
	struct damage *tmp_dam;

	mread(fd, (genericptr_t) &counter, sizeof(counter));
	if (!counter)
	    return;
	tmp_dam = (struct damage *)alloc(sizeof(struct damage));
	while (--counter >= 0) {
	    char damaged_shops[5], *shp = (char *)0;

	    mread(fd, (genericptr_t) tmp_dam, sizeof(*tmp_dam));
	    if (ghostly)
		tmp_dam->when += (monstermoves - omoves);
	    Strcpy(damaged_shops,
		   in_rooms(tmp_dam->place.x, tmp_dam->place.y, SHOPBASE));
	    if (u.uz.dlevel) {
		/* when restoring, there are two passes over the current
		 * level.  the first time, u.uz isn't set, so neither is
		 * shop_keeper().  just wait and process the damage on
		 * the second pass.
		 */
		for (shp = damaged_shops; *shp; shp++) {
		    struct monst *shkp = shop_keeper(*shp);

		    if (shkp && inhishop(shkp) &&
			    repair_damage(shkp, tmp_dam, TRUE))
			break;
		}
	    }
	    if (!shp || !*shp) {
		tmp_dam->next = level.damagelist;
		level.damagelist = tmp_dam;
		tmp_dam = (struct damage *)alloc(sizeof(*tmp_dam));
	    }
	}
	free((genericptr_t)tmp_dam);
}

restobjchn

The restobjchn function returns a linked list of type struct obj. Each dungeon level has an object chain containing all objects on the floor, and each container has an object chain of its contents.

STATIC_OVL struct obj *
restobjchn(fd, ghostly, frozen)
register int fd;
boolean ghostly, frozen;
{
	register struct obj *otmp, *otmp2 = 0;
	register struct obj *first = (struct obj *)0;
	int xl;

	while(1) {
		mread(fd, (genericptr_t) &xl, sizeof(xl));
		if(xl == -1) break;
		otmp = newobj(xl);

xl is the first block to be read from disk for each object. If it's -1, it indicates the end of the object chain. Otherwise, it contains the length of the oextra field in struct obj. Since sizeof(xl) depends on int width on a given processor, savefiles will not necessarily be portable between systems.

		if(!first) first = otmp;
		else otmp2->nobj = otmp;
		mread(fd, (genericptr_t) otmp,
					(unsigned) xl + sizeof(struct obj));

Reads xl + sizeof(struct obj) bytes directly into the struct. mread() appears to be a wrapper around a variety of implementations of the read() system call.

		if (ghostly) {
		    unsigned nid = flags.ident++;
		    add_id_mapping(otmp->o_id, nid);
		    otmp->o_id = nid;
		}
		if (ghostly && otmp->otyp == SLIME_MOLD) ghostfruit(otmp);
		/* Ghost levels get object age shifted from old player's clock
		 * to new player's clock.  Assumption: new player arrived
		 * immediately after old player died.
		 */
		if (ghostly && !frozen && !age_is_relative(otmp))
		    otmp->age = monstermoves - omoves + otmp->age;

		/* get contents of a container or statue */
		if (Has_contents(otmp)) {
		    struct obj *otmp3;
		    otmp->cobj = restobjchn(fd, ghostly, Is_IceBox(otmp));
		    /* restore container back pointers */
		    for (otmp3 = otmp->cobj; otmp3; otmp3 = otmp3->nobj)
			otmp3->ocontainer = otmp;
		}

Recursive call for populating the contents of containers.

		if (otmp->bypass) otmp->bypass = 0;

		otmp2 = otmp;
	}
	if(first && otmp2->nobj){
		impossible("Restobjchn: error reading objchn.");
		otmp2->nobj = 0;
	}

	return(first);
}

restmonchn

STATIC_OVL struct monst *
restmonchn(fd, ghostly)
register int fd;
boolean ghostly;
{
	register struct monst *mtmp, *mtmp2 = 0;
	register struct monst *first = (struct monst *)0;
	int xl;
	struct permonst *monbegin;
	boolean moved;

	/* get the original base address */
	mread(fd, (genericptr_t)&monbegin, sizeof(monbegin));
	moved = (monbegin != mons);

	while(1) {
		mread(fd, (genericptr_t) &xl, sizeof(xl));
		if(xl == -1) break;
		mtmp = newmonst(xl);
		if(!first) first = mtmp;
		else mtmp2->nmon = mtmp;
		mread(fd, (genericptr_t) mtmp, (unsigned) xl + sizeof(struct monst));
		if (ghostly) {
			unsigned nid = flags.ident++;
			add_id_mapping(mtmp->m_id, nid);
			mtmp->m_id = nid;
		}
		if (moved && mtmp->data) {
			int offset = mtmp->data - monbegin;	/*(ptrdiff_t)*/
			mtmp->data = mons + offset;  /* new permonst location */
		}
		if (ghostly) {
			int mndx = monsndx(mtmp->data);
			if (propagate(mndx, TRUE, ghostly) == 0) {
				/* cookie to trigger purge in getbones() */
				mtmp->mhpmax = DEFUNCT_MONSTER;	
			}
		}
		if(mtmp->minvent) {
			struct obj *obj;
			mtmp->minvent = restobjchn(fd, ghostly, FALSE);
			/* restore monster back pointer */
			for (obj = mtmp->minvent; obj; obj = obj->nobj)
				obj->ocarry = mtmp;
		}
		if (mtmp->mw) {
			struct obj *obj;

			for(obj = mtmp->minvent; obj; obj = obj->nobj)
				if (obj->owornmask & W_WEP) break;
			if (obj) mtmp->mw = obj;
			else {
				MON_NOWEP(mtmp);
				impossible("bad monster weapon restore");
			}
		}

		if (mtmp->isshk) restshk(mtmp, ghostly);
		if (mtmp->ispriest) restpriest(mtmp, ghostly);

		mtmp2 = mtmp;
	}
	if(first && mtmp2->nmon){
		impossible("Restmonchn: error reading monchn.");
		mtmp2->nmon = 0;
	}
	return(first);
}

loadfruitchn

STATIC_OVL struct fruit *
loadfruitchn(fd)
int fd;
{
	register struct fruit *flist, *fnext;

	flist = 0;
	while (fnext = newfruit(),
	       mread(fd, (genericptr_t)fnext, sizeof *fnext),
	       fnext->fid != 0) {
		fnext->nextf = flist;
		flist = fnext;
	}
	dealloc_fruit(fnext);
	return flist;
}

freefruitchn

STATIC_OVL void
freefruitchn(flist)
register struct fruit *flist;
{
	register struct fruit *fnext;

	while (flist) {
	    fnext = flist->nextf;
	    dealloc_fruit(flist);
	    flist = fnext;
	}
}

ghostfruit

STATIC_OVL void
ghostfruit(otmp)
register struct obj *otmp;
{
	register struct fruit *oldf;

	for (oldf = oldfruit; oldf; oldf = oldf->nextf)
		if (oldf->fid == otmp->spe) break;

	if (!oldf) impossible("no old fruit?");
	else otmp->spe = fruitadd(oldf->fname);
}

restgamestate

STATIC_OVL
boolean
restgamestate(fd, stuckid, steedid)
register int fd;
unsigned int *stuckid, *steedid;	/* STEED */
{
	/* discover is actually flags.explore */
	boolean remember_discover = discover;
	struct obj *otmp;
	int uid;

	mread(fd, (genericptr_t) &uid, sizeof uid);
	if (uid != getuid()) {		/* strange ... */
	    /* for wizard mode, issue a reminder; for others, treat it
	       as an attempt to cheat and refuse to restore this file */
	    pline("Saved game was not yours.");
#ifdef WIZARD
	    if (!wizard)
#endif
		return FALSE;
	}

	mread(fd, (genericptr_t) &flags, sizeof(struct flag));
	flags.bypasses = 0;	/* never use the saved value of bypasses */
	if (remember_discover) discover = remember_discover;

	role_init();	/* Reset the initial role, race, gender, and alignment */
#ifdef AMII_GRAPHICS
	amii_setpens(amii_numcolors);	/* use colors from save file */
#endif
	mread(fd, (genericptr_t) &u, sizeof(struct you));
	set_uasmon();
#ifdef CLIPPING
	cliparound(u.ux, u.uy);
#endif
	if(u.uhp <= 0 && (!Upolyd || u.mh <= 0)) {
	    u.ux = u.uy = 0;	/* affects pline() [hence You()] */
	    You("were not healthy enough to survive restoration.");
	    /* wiz1_level.dlevel is used by mklev.c to see if lots of stuff is
	     * uninitialized, so we only have to set it and not the other stuff.
	     */
	    wiz1_level.dlevel = 0;
	    u.uz.dnum = 0;
	    u.uz.dlevel = 1;
	    return(FALSE);
	}

	/* this stuff comes after potential aborted restore attempts */
	restore_timers(fd, RANGE_GLOBAL, FALSE, 0L);
	restore_light_sources(fd);
	invent = restobjchn(fd, FALSE, FALSE);
	migrating_objs = restobjchn(fd, FALSE, FALSE);
	migrating_mons = restmonchn(fd, FALSE);
	mread(fd, (genericptr_t) mvitals, sizeof(mvitals));

	/* this comes after inventory has been loaded */
	for(otmp = invent; otmp; otmp = otmp->nobj)
		if(otmp->owornmask)
			setworn(otmp, otmp->owornmask);
	/* reset weapon so that player will get a reminder about "bashing"
	   during next fight when bare-handed or wielding an unconventional
	   item; for pick-axe, we aren't able to distinguish between having
	   applied or wielded it, so be conservative and assume the former */
	otmp = uwep;	/* `uwep' usually init'd by setworn() in loop above */
	uwep = 0;	/* clear it and have setuwep() reinit */
	setuwep(otmp);	/* (don't need any null check here) */
	if (!uwep || uwep->otyp == PICK_AXE || uwep->otyp == GRAPPLING_HOOK)
	    unweapon = TRUE;

	restore_dungeon(fd);
	restlevchn(fd);
	mread(fd, (genericptr_t) &moves, sizeof moves);
	mread(fd, (genericptr_t) &monstermoves, sizeof monstermoves);
	mread(fd, (genericptr_t) &quest_status, sizeof(struct q_score));
	mread(fd, (genericptr_t) spl_book,
				sizeof(struct spell) * (MAXSPELL + 1));
	restore_artifacts(fd);
	restore_oracles(fd);
	if (u.ustuck)
		mread(fd, (genericptr_t) stuckid, sizeof (*stuckid));
#ifdef STEED
	if (u.usteed)
		mread(fd, (genericptr_t) steedid, sizeof (*steedid));
#endif
	mread(fd, (genericptr_t) pl_character, sizeof pl_character);

	mread(fd, (genericptr_t) pl_fruit, sizeof pl_fruit);
	mread(fd, (genericptr_t) &current_fruit, sizeof current_fruit);
	freefruitchn(ffruit);	/* clean up fruit(s) made by initoptions() */
	ffruit = loadfruitchn(fd);

	restnames(fd);
	restore_waterlevel(fd);
	/* must come after all mons & objs are restored */
	relink_timers(FALSE);
	relink_light_sources(FALSE);
	return(TRUE);
}

restlevelstate

/* update game state pointers to those valid for the current level (so we
* don't dereference a wild u.ustuck when saving the game state, for instance)
*/
STATIC_OVL void
restlevelstate(stuckid, steedid)
unsigned int stuckid, steedid;	/* STEED */
{
	register struct monst *mtmp;

	if (stuckid) {
		for (mtmp = fmon; mtmp; mtmp = mtmp->nmon)
			if (mtmp->m_id == stuckid) break;
		if (!mtmp) panic("Cannot find the monster ustuck.");
		u.ustuck = mtmp;
	}
#ifdef STEED
	if (steedid) {
		for (mtmp = fmon; mtmp; mtmp = mtmp->nmon)
			if (mtmp->m_id == steedid) break;
		if (!mtmp) panic("Cannot find the monster usteed.");
		u.usteed = mtmp;
		remove_monster(mtmp->mx, mtmp->my);
	}
#endif
}

/*ARGSUSED*/	/* fd used in MFLOPPY only */

restlevelfile

STATIC_OVL int
restlevelfile(fd, ltmp)
register int fd;
xchar ltmp;
#if defined(macintosh) && (defined(__SC__) || defined(__MRC__))
# pragma unused(fd)
#endif
{
	register int nfd;
	char whynot[BUFSZ];

	nfd = create_levelfile(ltmp, whynot);
	if (nfd < 0) {
		/* BUG: should suppress any attempt to write a panic
		   save file if file creation is now failing... */
		panic("restlevelfile: %s", whynot);
	}
#ifdef MFLOPPY
	if (!savelev(nfd, ltmp, COUNT_SAVE)) {

		/* The savelev can't proceed because the size required
		 * is greater than the available disk space.
		 */
		pline("Not enough space on `%s' to restore your game.",
			levels);

		/* Remove levels and bones that may have been created.
		 */
		(void) close(nfd);
# ifdef AMIGA
		clearlocks();
# else
		eraseall(levels, alllevels);
		eraseall(levels, allbones);

		/* Perhaps the person would like to play without a
		 * RAMdisk.
		 */
		if (ramdisk) {
			/* PlaywoRAMdisk may not return, but if it does
			 * it is certain that ramdisk will be 0.
			 */
			playwoRAMdisk();
			/* Rewind save file and try again */
			(void) lseek(fd, (off_t)0, 0);
			(void) uptodate(fd, (char *)0);	/* skip version */
			return dorecover(fd);	/* 0 or 1 */
		} else {
# endif
			pline("Be seeing you...");
			terminate(EXIT_SUCCESS);
# ifndef AMIGA
		}
# endif
	}
#endif
	bufon(nfd);
	savelev(nfd, ltmp, WRITE_SAVE | FREE_SAVE);
	bclose(nfd);
	return(2);
}

dorecover

int
dorecover(fd)
register int fd;
{
	unsigned int stuckid = 0, steedid = 0;	/* not a register */
	xchar ltmp;
	int rtmp;
	struct obj *otmp;

#ifdef STORE_PLNAME_IN_FILE
	mread(fd, (genericptr_t) plname, PL_NSIZ);
#endif

	restoring = TRUE;
	getlev(fd, 0, (xchar)0, FALSE);
	if (!restgamestate(fd, &stuckid, &steedid)) {
		display_nhwindow(WIN_MESSAGE, TRUE);
		savelev(-1, 0, FREE_SAVE);	/* discard current level */
		(void) close(fd);
		(void) delete_savefile();
		restoring = FALSE;
		return(0);
	}
	restlevelstate(stuckid, steedid);
#ifdef INSURANCE
	savestateinlock();
#endif
	rtmp = restlevelfile(fd, ledger_no(&u.uz));
	if (rtmp < 2) return(rtmp);  /* dorecover called recursively */

	/* these pointers won't be valid while we're processing the
	 * other levels, but they'll be reset again by restlevelstate()
	 * afterwards, and in the meantime at least u.usteed may mislead
	 * place_monster() on other levels
	 */
	u.ustuck = (struct monst *)0;
#ifdef STEED
	u.usteed = (struct monst *)0;
#endif

#ifdef MICRO
# ifdef AMII_GRAPHICS
	{
	extern struct window_procs amii_procs;
	if(windowprocs.win_init_nhwindows== amii_procs.win_init_nhwindows){
	    extern winid WIN_BASE;
	    clear_nhwindow(WIN_BASE);	/* hack until there's a hook for this */
	}
	}
# else
	clear_nhwindow(WIN_MAP);
# endif
	clear_nhwindow(WIN_MESSAGE);
	You("return to level %d in %s%s.",
		depth(&u.uz), dungeons[u.uz.dnum].dname,
		flags.debug ? " while in debug mode" :
		flags.explore ? " while in explore mode" : "");
	curs(WIN_MAP, 1, 1);
	dotcnt = 0;
	dotrow = 2;
	if (strncmpi("X11", windowprocs.name, 3))
	  putstr(WIN_MAP, 0, "Restoring:");
#endif
	while(1) {
#ifdef ZEROCOMP
		if(mread(fd, (genericptr_t) &ltmp, sizeof ltmp) < 0)
#else
		if(read(fd, (genericptr_t) &ltmp, sizeof ltmp) != sizeof ltmp)
#endif
			break;
		getlev(fd, 0, ltmp, FALSE);
#ifdef MICRO
		curs(WIN_MAP, 1+dotcnt++, dotrow);
		if (dotcnt >= (COLNO - 1)) {
			dotrow++;
			dotcnt = 0;
		}
		if (strncmpi("X11", windowprocs.name, 3)){
		  putstr(WIN_MAP, 0, ".");
		}
		mark_synch();
#endif
		rtmp = restlevelfile(fd, ltmp);
		if (rtmp < 2) return(rtmp);  /* dorecover called recursively */
	}

#ifdef BSD
	(void) lseek(fd, 0L, 0);
#else
	(void) lseek(fd, (off_t)0, 0);
#endif
	(void) uptodate(fd, (char *)0);		/* skip version info */
#ifdef STORE_PLNAME_IN_FILE
	mread(fd, (genericptr_t) plname, PL_NSIZ);
#endif
	getlev(fd, 0, (xchar)0, FALSE);
	(void) close(fd);

	if (!wizard && !discover)
		(void) delete_savefile();
#ifdef REINCARNATION
	if (Is_rogue_level(&u.uz)) assign_rogue_graphics(TRUE);
#endif
#ifdef USE_TILES
	substitute_tiles(&u.uz);
#endif
	restlevelstate(stuckid, steedid);
#ifdef MFLOPPY
	gameDiskPrompt();
#endif
	max_rank_sz(); /* to recompute mrank_sz (botl.c) */
	/* take care of iron ball & chain */
	for(otmp = fobj; otmp; otmp = otmp->nobj)
		if(otmp->owornmask)
			setworn(otmp, otmp->owornmask);

	/* in_use processing must be after:
	 *    + The inventory has been read so that freeinv() works.
	 *    + The current level has been restored so billing information
	 *	is available.
	 */
	inven_inuse(FALSE);

	load_qtlist();	/* re-load the quest text info */
	reset_attribute_clock();
	/* Set up the vision internals, after levl[] data is loaded */
	/* but before docrt().					    */
	vision_reset();
	vision_full_recalc = 1;	/* recompute vision (not saved) */

	run_timers();	/* expire all timers that have gone off while away */
	docrt();
	restoring = FALSE;
	clear_nhwindow(WIN_MESSAGE);
	program_state.something_worth_saving++;	/* useful data now exists */

	/* Success! */
	welcome(FALSE);
	return(1);
}

trickery

void
trickery(reason)
char *reason;
{
	pline("Strange, this map is not as I remember it.");
	pline("Somebody is trying some trickery here...");
	pline("This game is void.");
	killer = reason;
	done(TRICKED);
}

getlev

void
getlev(fd, pid, lev, ghostly)
int fd, pid;
xchar lev;
boolean ghostly;
{
	register struct trap *trap;
	register struct monst *mtmp;
	branch *br;
	int hpid;
	xchar dlvl;
	int x, y;
#ifdef TOS
	short tlev;
#endif

	if (ghostly)
	    clear_id_mapping();

#if defined(MSDOS) || defined(OS2)
	setmode(fd, O_BINARY);
#endif
	/* Load the old fruit info.  We have to do it first, so the
	 * information is available when restoring the objects.
	 */
	if (ghostly) oldfruit = loadfruitchn(fd);

	/* First some sanity checks */
	mread(fd, (genericptr_t) &hpid, sizeof(hpid));
/* CHECK:  This may prevent restoration */
#ifdef TOS
	mread(fd, (genericptr_t) &tlev, sizeof(tlev));
	dlvl=tlev&0x00ff;
#else
	mread(fd, (genericptr_t) &dlvl, sizeof(dlvl));
#endif
	if ((pid && pid != hpid) || (lev && dlvl != lev)) {
	    char trickbuf[BUFSZ];

	    if (pid && pid != hpid)
		Sprintf(trickbuf, "PID (%d) doesn't match saved PID (%d)!",
			hpid, pid);
	    else
		Sprintf(trickbuf, "This is level %d, not %d!", dlvl, lev);
#ifdef WIZARD
	    if (wizard) pline(trickbuf);
#endif
	    trickery(trickbuf);
	}

#ifdef RLECOMP
	{
		short	i, j;
		uchar	len;
		struct rm r;
		
#if defined(MAC)
		/* Suppress warning about used before set */
		(void) memset((genericptr_t) &r, 0, sizeof(r));
#endif
		i = 0; j = 0; len = 0;
		while(i < ROWNO) {
		    while(j < COLNO) {
			if(len > 0) {
			    levl[j][i] = r;
			    len -= 1;
			    j += 1;
			} else {
			    mread(fd, (genericptr_t)&len, sizeof(uchar));
			    mread(fd, (genericptr_t)&r, sizeof(struct rm));
			}
		    }
		    j = 0;
		    i += 1;
		}
	}
#else
	mread(fd, (genericptr_t) levl, sizeof(levl));
#endif	/* RLECOMP */

	mread(fd, (genericptr_t)&omoves, sizeof(omoves));
	mread(fd, (genericptr_t)&upstair, sizeof(stairway));
	mread(fd, (genericptr_t)&dnstair, sizeof(stairway));
	mread(fd, (genericptr_t)&upladder, sizeof(stairway));
	mread(fd, (genericptr_t)&dnladder, sizeof(stairway));
	mread(fd, (genericptr_t)&sstairs, sizeof(stairway));
	mread(fd, (genericptr_t)&updest, sizeof(dest_area));
	mread(fd, (genericptr_t)&dndest, sizeof(dest_area));
	mread(fd, (genericptr_t)&level.flags, sizeof(level.flags));
	mread(fd, (genericptr_t)doors, sizeof(doors));
	rest_rooms(fd);		/* No joke :-) */
	if (nroom)
	    doorindex = rooms[nroom - 1].fdoor + rooms[nroom - 1].doorct;
	else
	    doorindex = 0;

	restore_timers(fd, RANGE_LEVEL, ghostly, monstermoves - omoves);
	restore_light_sources(fd);
	fmon = restmonchn(fd, ghostly);

	/* regenerate animals while on another level */
	if (u.uz.dlevel) {
	    register struct monst *mtmp2;

	    for (mtmp = fmon; mtmp; mtmp = mtmp2) {
		mtmp2 = mtmp->nmon;
		if (ghostly) {
			/* reset peaceful/malign relative to new character */
			if(!mtmp->isshk)
				/* shopkeepers will reset based on name */
				mtmp->mpeaceful = peace_minded(mtmp->data);
			set_malign(mtmp);
		} else if (monstermoves > omoves)
			mon_catchup_elapsed_time(mtmp, monstermoves - omoves);

		/* update shape-changers in case protection against
		   them is different now than when the level was saved */
		restore_cham(mtmp);
	    }
	}

	rest_worm(fd);	/* restore worm information */
	ftrap = 0;
	while (trap = newtrap(),
	       mread(fd, (genericptr_t)trap, sizeof(struct trap)),
	       trap->tx != 0) {	/* need "!= 0" to work around DICE 3.0 bug */
		trap->ntrap = ftrap;
		ftrap = trap;
	}
	dealloc_trap(trap);
	fobj = restobjchn(fd, ghostly, FALSE);
	find_lev_obj();
	/* restobjchn()'s `frozen' argument probably ought to be a callback
	   routine so that we can check for objects being buried under ice */
	level.buriedobjlist = restobjchn(fd, ghostly, FALSE);
	billobjs = restobjchn(fd, ghostly, FALSE);
	rest_engravings(fd);

	/* reset level.monsters for new level */
	for (x = 0; x < COLNO; x++)
	    for (y = 0; y < ROWNO; y++)
		level.monsters[x][y] = (struct monst *) 0;
	for (mtmp = level.monlist; mtmp; mtmp = mtmp->nmon) {
	    if (mtmp->isshk)
		set_residency(mtmp, FALSE);
	    place_monster(mtmp, mtmp->mx, mtmp->my);
	    if (mtmp->wormno) place_wsegs(mtmp);
	}
	restdamage(fd, ghostly);

	rest_regions(fd, ghostly);
	if (ghostly) {
	    /* Now get rid of all the temp fruits... */
	    freefruitchn(oldfruit),  oldfruit = 0;

	    if (lev > ledger_no(&medusa_level) &&
			lev < ledger_no(&stronghold_level) && xdnstair == 0) {
		coord cc;

		mazexy(&cc);
		xdnstair = cc.x;
		ydnstair = cc.y;
		levl[cc.x][cc.y].typ = STAIRS;
	    }

	    br = Is_branchlev(&u.uz);
	    if (br && u.uz.dlevel == 1) {
		d_level ltmp;

		if (on_level(&u.uz, &br->end1))
		    assign_level(&ltmp, &br->end2);
		else
		    assign_level(&ltmp, &br->end1);

		switch(br->type) {
		case BR_STAIR:
		case BR_NO_END1:
		case BR_NO_END2: /* OK to assign to sstairs if it's not used */
		    assign_level(&sstairs.tolev, &ltmp);
		    break;		
		case BR_PORTAL: /* max of 1 portal per level */
		    {
			register struct trap *ttmp;
			for(ttmp = ftrap; ttmp; ttmp = ttmp->ntrap)
			    if (ttmp->ttyp == MAGIC_PORTAL)
				break;
			if (!ttmp) panic("getlev: need portal but none found");
			assign_level(&ttmp->dst, &ltmp);
		    }
		    break;
		}
	    } else if (!br) {
		/* Remove any dangling portals. */
		register struct trap *ttmp;
		for (ttmp = ftrap; ttmp; ttmp = ttmp->ntrap)
		    if (ttmp->ttyp == MAGIC_PORTAL) {
			deltrap(ttmp);
			break; /* max of 1 portal/level */
		    }
	    }
	}

	/* must come after all mons & objs are restored */
	relink_timers(ghostly);
	relink_light_sources(ghostly);
	reset_oattached_mids(ghostly);

	if (ghostly)
	    clear_id_mapping();
}

clear_id_mapping

/* Clear all structures for object and monster ID mapping. */
STATIC_OVL void
clear_id_mapping()
{
struct bucket *curr;

while ((curr = id_map) != 0) {
	id_map = curr->next;
	free((genericptr_t) curr);
}
n_ids_mapped = 0;
}

add_id_mapping

/* Add a mapping to the ID map. */
STATIC_OVL void
add_id_mapping(gid, nid)
unsigned gid, nid;
{
int idx;

idx = n_ids_mapped % N_PER_BUCKET;
/* idx is zero on first time through, as well as when a new bucket is */
/* needed */
if (idx == 0) {
	struct bucket *gnu = (struct bucket *) alloc(sizeof(struct bucket));
	gnu->next = id_map;
	id_map = gnu;
}

id_map->map[idx].gid = gid;
id_map->map[idx].nid = nid;
n_ids_mapped++;
}

lookup_id_mapping

/*
* Global routine to look up a mapping.  If found, return TRUE and fill
* in the new ID value.  Otherwise, return false and return -1 in the new
* ID.
*/
boolean
lookup_id_mapping(gid, nidp)
unsigned gid, *nidp;
{
int i;
struct bucket *curr;

if (n_ids_mapped)
	for (curr = id_map; curr; curr = curr->next) {
	    /* first bucket might not be totally full */
	    if (curr == id_map) {
		i = n_ids_mapped % N_PER_BUCKET;
		if (i == 0) i = N_PER_BUCKET;
	    } else
		i = N_PER_BUCKET;

	    while (--i >= 0)
		if (gid == curr->map[i].gid) {
		    *nidp = curr->map[i].nid;
		    return TRUE;
		}
	}

return FALSE;
}

reset_oattached_mids

STATIC_OVL void
reset_oattached_mids(ghostly)
boolean ghostly;
{
struct obj *otmp;
unsigned oldid, nid;
for (otmp = fobj; otmp; otmp = otmp->nobj) {
	if (ghostly && otmp->oattached == OATTACHED_MONST && otmp->oxlth) {
	    struct monst *mtmp = (struct monst *)otmp->oextra;

	    mtmp->m_id = 0;
	    mtmp->mpeaceful = mtmp->mtame = 0;	/* pet's owner died! */
	}
	if (ghostly && otmp->oattached == OATTACHED_M_ID) {
	    (void) memcpy((genericptr_t)&oldid, (genericptr_t)otmp->oextra,
								sizeof(oldid));
	    if (lookup_id_mapping(oldid, &nid))
		(void) memcpy((genericptr_t)otmp->oextra, (genericptr_t)&nid,
								sizeof(nid));
	    else
		otmp->oattached = OATTACHED_NOTHING;
	}
}
}

#ifdef ZEROCOMP
#define RLESC '\0'	/* Leading character for run of RLESC's */

#ifndef ZEROCOMP_BUFSIZ
#define ZEROCOMP_BUFSIZ BUFSZ
#endif
static NEARDATA unsigned char inbuf[ZEROCOMP_BUFSIZ];
static NEARDATA unsigned short inbufp = 0;
static NEARDATA unsigned short inbufsz = 0;
static NEARDATA short inrunlength = -1;
static NEARDATA int mreadfd;

mgetc

(mgetc is only used if ZEROCOMP is defined. It's called by mread.)

static int
mgetc()
{
if (inbufp >= inbufsz) {
	inbufsz = read(mreadfd, (genericptr_t)inbuf, sizeof inbuf);
	if (!inbufsz) {
	    if (inbufp > sizeof inbuf)
		error("EOF on file #%d.\n", mreadfd);
	    inbufp = 1 + sizeof inbuf;  /* exactly one warning :-) */
	    return -1;
	}
	inbufp = 0;
}
return inbuf[inbufp++];
}

minit

(This version of minit is used only if ZEROCOMP is #defined.)

void
minit()
{
inbufsz = 0;
inbufp = 0;
inrunlength = -1;
}

mread

(This version of mread is used only if ZEROCOMP is #defined.)

int
mread(fd, buf, len)
int fd;
genericptr_t buf;
register unsigned len;
{
/*register int readlen = 0;*/
if (fd < 0) error("Restore error; mread attempting to read file %d.", fd);
mreadfd = fd;
while (len--) {
	if (inrunlength > 0) {
	    inrunlength--;
	    *(*((char **)&buf))++ = '\0';
	} else {
	    register short ch = mgetc();
	    if (ch < 0) return -1; /*readlen;*/
	    if ((*(*(char **)&buf)++ = (char)ch) == RLESC) {
		inrunlength = mgetc();
	    }
	}
	/*readlen++;*/
}
return 0; /*readlen;*/
}

#else /* ZEROCOMP */

minit

(This version of minit is used only if ZEROCOMP is not #defined.)

void
minit()
{
return;
}

mread

(This version of mread is used only if ZEROCOMP is not #defined.)

void
mread(fd, buf, len)
register int fd;
register genericptr_t buf;
register unsigned int len;
{
	register int rlen;

#if defined(BSD) || defined(ULTRIX)
	rlen = read(fd, buf, (int) len);
	if(rlen != len){
#else /* e.g. SYSV, __TURBOC__ */
	rlen = read(fd, buf, (unsigned) len);
	if((unsigned)rlen != len){
#endif
		pline("Read %d instead of %u bytes.", rlen, len);
		if(restoring) {
			(void) close(fd);
			(void) delete_savefile();
			error("Error restoring old game.");
		}
		panic("Error reading level file.");
	}
}

#endif /* ZEROCOMP */

/*restore.c*/