/*      SCCS Id: @(#)timeout.c  3.2     96/06/02        */
/* Copyright (c) Stichting Mathematisch Centrum, Amsterdam, 1985. */
/* NetHack may be freely redistributed.  See license for details. */

#include "hack.h"
#include "lev.h"        /* for checking save modes */

STATIC_DCL void NDECL(stoned_dialogue);
STATIC_DCL void NDECL(vomiting_dialogue);
STATIC_DCL void NDECL(choke_dialogue);
STATIC_DCL void NDECL(slime_dialogue);
STATIC_DCL void NDECL(slip_or_trip);
static void FDECL(see_lamp_flicker, (struct obj *, const char *));
static void FDECL(lantern_message, (struct obj *));

STATIC_DCL void NDECL(tech_timeout);	/* WAC */


#ifdef OVLB

/* He is being petrified - dialogue by inmet!tower */
static NEARDATA const char *stoned_texts[] = {
	"You are slowing down.",                /* 5 */
	"Your limbs are stiffening.",           /* 4 */
	"Your limbs have turned to stone.",     /* 3 */
	"You have turned to stone.",            /* 2 */
	"You are a statue."                     /* 1 */
};

STATIC_OVL void
stoned_dialogue()
{
	register long i = (Stoned & TIMEOUT);

	if(i > 0 && i <= SIZE(stoned_texts))
		pline(stoned_texts[SIZE(stoned_texts) - i]);
	if(i == 5)
		HFast = 0;
	if(i == 3)
		nomul(-3);
	exercise(A_DEX, FALSE);
}


static NEARDATA const char *slime_texts[] = {
	"You are turning a little green.",           /* 5 */
	"Your limbs are getting oozy.",              /* 4 */
	"Your skin begins to peel away.",            /* 3 */
	"You have turned into green slime.",         /* 2 */
	"You are a pool of slime."                   /* 1 */
};

STATIC_OVL void
slime_dialogue() {
	register long i = (Slimed & TIMEOUT) / 3L;

	if ((((Slimed & TIMEOUT) % 3L) == 2) && (i >= 0)
	    && (i < SIZE(slime_texts)))
		pline(slime_texts[SIZE(slime_texts) - i - 1]);
	if(i == 4)
		HFast = 0;
	exercise(A_DEX, FALSE);
}

/* He is getting sicker and sicker prior to vomiting */
static NEARDATA const char *vomiting_texts[] = {
	"You are feeling mildly nauseous.",     /* 14 */
	"You feel slightly confused.",          /* 11 */
	"You can't seem to think straight.",    /* 8 */
	"You feel incredibly sick.",            /* 5 */
	"You suddenly vomit!"                   /* 2 */
};

STATIC_OVL void
vomiting_dialogue()
{
	register long i = (Vomiting & TIMEOUT) / 3L;

	if ((((Vomiting & TIMEOUT) % 3L) == 2) && (i >= 0)
	    && (i < SIZE(vomiting_texts)))
		pline(vomiting_texts[SIZE(vomiting_texts) - i - 1]);

	switch ((int) i) {
	case 0:
		vomit();
		morehungry(20);
		break;
	case 2:
		make_stunned(HStun + d(2,4), FALSE);
		/* fall through */
	case 3:
		make_confused(HConfusion + d(2,4), FALSE);
		break;
	}
	exercise(A_CON, FALSE);
}

static NEARDATA const char *choke_texts[] = {
	"You find it hard to breathe.",
	"You're gasping for air.",
	"You can no longer breathe.",
	"You're turning %s.",
	"You suffocate."
};

static NEARDATA const char *choke_texts2[] = {
	"Your %s is becoming constricted.",
	"Your blood is having trouble reaching your brain.",
	"The pressure on your %s increases.",
	"Your consciousness is fading.",
	"You suffocate."
};

STATIC_OVL void
choke_dialogue()
{
	register long i = (Strangled & TIMEOUT);

	if(i > 0 && i <= SIZE(choke_texts)) {
	    if (Breathless || !rn2(50))
		pline(choke_texts2[SIZE(choke_texts2) - i], body_part(NECK));
	    else
		pline(choke_texts[SIZE(choke_texts) - i], hcolor(blue));
	}
	exercise(A_STR, FALSE);
}

#endif /* OVLB */
#ifdef OVL0

void
nh_timeout()
{
	register struct prop *upp;
/*
	char c;
 */
	int sleeptime;
	int m_idx;

	if(u.uluck && moves % (u.uhave.amulet || u.ugangr ? 300 : 600) == 0) {
	/* Cursed luckstones stop bad luck from timing out; blessed luckstones
	 * stop good luck from timing out; normal luckstones stop both;
	 * neither is stopped if you don't have a luckstone.
	 * Luck is based at 0 usually, +1 if a full moon and -1 on Friday 13th
	 */
	    register int time_luck = stone_luck(FALSE);
	    boolean nostone = !carrying(LUCKSTONE) && !stone_luck(TRUE);
	    int baseluck = (flags.moonphase == FULL_MOON) ? 1 : 0;

	    baseluck -= (flags.friday13 ? 1 : 0);

	    if(u.uluck > baseluck && (nostone || time_luck < 0))
		u.uluck--;
	    else if(u.uluck < baseluck && (nostone || time_luck > 0))
		u.uluck++;
	}

	/* WAC -- check for timeout of specials */
	tech_timeout();

	if(u.uinvulnerable) return; /* things past this point could kill you */
	if(Stoned) stoned_dialogue();
	if(Slimed) slime_dialogue();
	if(Vomiting) vomiting_dialogue();
	if(Strangled) choke_dialogue();
	if(Upolyd) if(!--u.mtimedone) {
		/* KMH, balance patch -- new intrinsic */
		if (Unchanging)
			u.mtimedone = rnd(100 * uasmon->mlevel);
		else
			rehumanize();
	}
	if(u.ucreamed) u.ucreamed--;

	for(upp = u.uprops; upp < u.uprops+SIZE(u.uprops); upp++)
		/* KMH, intrinsic patch */
	    if((upp->intrinsic & TIMEOUT) && !(--upp->intrinsic & TIMEOUT)) {
		switch(upp - u.uprops){
		case STONED:
			if (!killer) {
				killer_format = KILLED_BY;
				killer = "petrification";
			} done(STONING);
			break;
		case SLIMED:
			if (!killer) {
				killer_format = KILLED_BY_AN;
				killer = "green slime";
			} done(TURNED_SLIME);
			break;
		case VOMITING:
			make_vomiting(0L, TRUE);
			break;
		case INDIGESTION:
			make_vomiting((long)rn1(15,10), FALSE);
			if (EIndigestion)
				HIndigestion = rn1(100,100);
			break;
		case SICK:
			You("die from your illness.");
			killer_format = KILLED_BY_AN;
			killer = u.usick_cause;
			if ((m_idx = name_to_mon(killer)) >= LOW_PM) {
			    if (type_is_pname(&mons[m_idx])) {
				killer_format = KILLED_BY;
			    }
#if 0                           /* at present, there aren't any monster
				   poisoners with titles rather than names */
			    else if (mons[m_idx].geno & G_UNIQ) {
				char buf[BUFSZ];
				Sprintf(buf, "the %s", killer);
				Strcpy(u.usick_cause, buf);
				killer_format = KILLED_BY;
			    }
#endif
			}
			u.usick_type = 0;
			done(POISONING);
			break;
		case FAST:
#ifdef YEOMAN
			EFast &= ~W_SADDLE;
#endif
			if (!Very_fast)
				You_feel("yourself slowing down%s.",
				               Fast ? " a bit" : "");
			break;
		case FIRE_RES:
			if (!Fire_resistance)
				You("feel a little warmer.");
			break;
		case COLD_RES:
			if (!Cold_resistance)
				You("feel a little cooler.");
			break;
		case SLEEP_RES:
			if (!Sleep_resistance)
				You("feel a little sleepy.");
			break;
		case SHOCK_RES:
			if (!Shock_resistance)
				You("feel a little static cling.");
			break;
		case POISON_RES:
			if (!Poison_resistance)
				You("feel a little less healthy.");
			break;
		case DISINT_RES:
			if (!Disint_resistance)
				You("feel a little less firm.");
			break;
		case TELEPORT:
			if (!Teleportation)
				You("feel a little less jumpy.");
			break;
		case TELEPORT_CONTROL:
			if (!Teleport_control)
				You("feel a little less in control of yourself.");
			break;
		case TELEPAT:
			if (!HTelepat)
				You("feel a little less mentally acute.");
			break;
		case FREE_ACTION:
			if (!Free_action)
				You("feel a little stiffer.");
			break;
		case INVULNERABLE:
			if (!Invulnerable)
				You("are no longer invulnerable.");
			break;
		case CONFUSION:
			HConfusion = 1; /* So make_confused works properly */
			make_confused(0L, TRUE);
			stop_occupation();
			break;
		case STUNNED:
			HStun = 1;
			make_stunned(0L, TRUE);
			stop_occupation();
			break;
		case BLINDED:
			Blinded = 1;
			make_blinded(0L, TRUE);
			stop_occupation();
			break;
		case INVIS:
			newsym(u.ux,u.uy);
			if (!Invis && !BInvis &&
			    !See_invisible && !Blind) {
				You("are no longer invisible.");
				stop_occupation();
			}
			break;
		case SEE_INVIS:
			set_mimic_blocking(); /* do special mimic handling */
			see_monsters();         /* make invis mons appear */
			newsym(u.ux,u.uy);      /* make self appear */
			stop_occupation();
			break;
		case WOUNDED_LEGS:
			heal_legs();
			stop_occupation();
			break;
		case HALLUC:
			HHallucination = 1;
			make_hallucinated(0L, TRUE, 0L);
			stop_occupation();
			break;
		case SLEEPING:
			if (unconscious() || Sleep_resistance)
				HSleeping += rnd(100);
			else if (ESleeping) {
				/* WAC? */
				/* KMH -- Blessed should NOT behave differently */
/*				if(uamul && uamul->otyp ==                                
				   AMULET_OF_RESTFUL_SLEEP && uamul->blessed)
					break;*/
				You("fall asleep.");
				sleeptime = rnd(20);
				fall_asleep(-sleeptime, TRUE);
				HSleeping = sleeptime + rnd(100);
			}
			break;
		case LEVITATION:
			(void) float_down(I_SPECIAL|TIMEOUT, 0L);
			break;
		case STRANGLED:
			killer_format = KILLED_BY;
			killer = (u.uburied) ? "suffocation" : "strangulation";
			done(DIED);
			break;
		case FUMBLING:
			/* call this only when a move took place.  */
			/* otherwise handle fumbling msgs locally. */
			if (u.umoved && !Levitation) {
			    slip_or_trip();
			    nomul(-2);
			    nomovemsg = "";
			    /* The more you are carrying the more likely you
			     * are to make noise when you fumble.  Adjustments
			     * to this number must be thoroughly play tested.
			     */
			    if ((inv_weight() > -500)) {
				You("make a lot of noise!");
				wake_nearby();
			    }
			}
			/* from outside means slippery ice; don't reset
			   counter if that's the only fumble reason */
			HFumbling &= ~FROMOUTSIDE;
			if (Fumbling)
			    HFumbling += rnd(20);
			break;
		}
	}

	run_timers();
}


void
tech_timeout()
{
	if (tech_inuse(T_EVISCERATE) == 1) {
		You("retract your claws.");
		/* You're using bare hands now,  so new msg for next attack */
		unweapon=TRUE;                
	} else if (tech_inuse(T_BERSERK) == 1) {
		The("red haze in your mind clears.");
	} else if (tech_inuse(T_KIII) == 1) {
		You("calm down.");
	} else if (tech_inuse(T_FLURRY) == 1) {
		You("relax.");
	} else if (tech_inuse(T_E_FIST) == 1) {
		You("feel the power dissipate.");
	} else if (tech_inuse(T_SIGIL_TEMPEST) == 1) {
		pline_The("sigil of tempest fades.");
	} else if (tech_inuse(T_SIGIL_CONTROL) == 1) {
		pline_The("sigil of control fades.");
	} else if (tech_inuse(T_SIGIL_DISCHARGE) == 1) {
		pline_The("sigil of discharge fades.");
	}
}


#endif /* OVL0 */
#ifdef OVL1

void
fall_asleep(how_long, wakeup_msg)
int how_long;
boolean wakeup_msg;
{
	stop_occupation();
	nomul(how_long);
	/* early wakeup from combat won't be possible until next monster turn */
	u.usleep = monstermoves;
	nomovemsg = wakeup_msg ? "You wake up." : You_can_move_again;
}


#ifdef UNPOLYPILE
/* WAC polymorph an object
 * Unlike monsters,  this function is called after the polymorph
 * no need to check - just attach the timer
 */
void
set_obj_poly(obj, oldtyp)
struct obj *obj;
short oldtyp;
{
	/* Same unpolytime (500,500) as for player */
	/* Stop any old timers.   */
	if (stop_timer(UNPOLY_OBJ, (genericptr_t) obj) == 0L)
		obj->oldtyp = oldtyp;
	(void) start_timer(rn1(500,500), TIMER_OBJECT,
			UNPOLY_OBJ, (genericptr_t) obj);
	return;
}

/* timer callback routine: undo polymorph on an object */
void
unpoly_obj(arg, timeout)
	genericptr_t arg;
	long timeout;
{
	struct obj *obj;
	int oldobj;

	obj = (struct obj *) arg;
	oldobj = obj->oldtyp;

	if (carried(obj))
		pline("Suddenly, your %s!", aobjnam(obj, "transmute"));

	(void) stop_timer(UNPOLY_OBJ, (genericptr_t) obj);

	poly_obj(obj, oldobj);

	return;
}
#endif /* UNPOLYPILE */


/* WAC polymorph a monster
   Assume polymorph is successful if i != 0
 */
int
mon_poly(mtmp)
struct monst *mtmp;
{
	int i;
	char name[BUFSZ];

	if (canseemon(mtmp)) pline("%s changes!", Monnam(mtmp));
	/* Lengthen unpolytime - was 500,500  for player */
	i = mon_spec_poly(mtmp, (struct permonst *)0, rn1(1000,1000));
	if (!i) {
		/* Uhoh.  newcham wasn't able to make the polymorph...*/
		if (canseemon(mtmp)) pline("%s shudders.", Monnam(mtmp));
		mondead(mtmp);
		return(0);
	}
	return(i);
}


/* WAC Muscle function - for more control over polying
 * returns int value from newcham
 * cancels/sets up timers if polymorph is successful
 * lets receiver handle failures
 */

int
mon_spec_poly(mtmp, type, time)
struct monst *mtmp;
struct permonst *type;
long time;
{
	int i;

	i = newcham(mtmp, type);
	if (i) {
		/* Stop any old timers.   */
		(void) stop_timer(UNPOLY_MON, (genericptr_t) mtmp);
		(void) start_timer(time, TIMER_MONSTER,
				UNPOLY_MON, (genericptr_t) mtmp);
	}
	return(i);
}


/* timer callback routine: undo polymorph on a monster */
void
unpoly_mon(arg, timeout)
	genericptr_t arg;
	long timeout;
{
	struct monst *mtmp;
	int oldmon;
	char oldname[BUFSZ];  /* DON'T use char * since this will change! */

	mtmp = (struct monst *) arg;
	oldmon = mtmp->oldmonnm;

	strcpy(oldname, Monnam(mtmp));

	(void) stop_timer(UNPOLY_MON, (genericptr_t) mtmp);

	if (!newcham(mtmp, &mons[oldmon])) {
		/* Wasn't able to unpolymorph */
		if (canseemon(mtmp)) pline("%s shudders.", oldname);
		mondead(mtmp);
		return;
	}

	/* Check if current form is genocided */
	if (mvitals[oldmon].mvflags & G_GENOD) {
		mtmp->mhp = 0;
		if (canseemon(mtmp)) pline("%s shudders.", oldname);
		/*  Since only player can read scrolls of genocide... */
		xkilled(mtmp, 3);
		return;
	}

	if (canseemon(mtmp)) pline ("%s changes into %s!", 
			oldname, an(mtmp->data->mname));
	return;
}


/* Attach an egg hatch timeout to the given egg. */
void
attach_egg_hatch_timeout(egg)
struct obj *egg;
{
	int i;

	/* stop previous timer, if any */
	(void) stop_timer(HATCH_EGG, (genericptr_t) egg);

	/*
	 * Decide if and when to hatch the egg.  The old hatch_it() code tried
	 * once a turn from age 151 to 200 (inclusive), hatching if it rolled
	 * a number x, 1<=x<=age, where x>150.  This yields a chance of
	 * hatching > 99.9993%.  Mimic that here.
	 */
	for (i = (MAX_EGG_HATCH_TIME-50)+1; i <= MAX_EGG_HATCH_TIME; i++)
	    if (rnd(i) > 150) {
		/* egg will hatch */
		(void) start_timer((long)i, TIMER_OBJECT,
						HATCH_EGG, (genericptr_t)egg);
		break;
	    }
}

/* prevent an egg from ever hatching */
void
kill_egg(egg)
struct obj *egg;
{
	/* stop previous timer, if any */
	(void) stop_timer(HATCH_EGG, (genericptr_t) egg);
}

/* timer callback routine: hatch the given egg */
void
hatch_egg(arg, timeout)
genericptr_t arg;
long timeout;
{
	struct obj *egg;
	struct monst *mon, *mon2;
	coord cc;
	xchar x, y;
	boolean yours, silent, canseeit = FALSE;
	int i, mnum, hatchcount = 0;

	egg = (struct obj *) arg;
	/* sterilized while waiting */
	if (egg->corpsenm == NON_PM) return;

	mon = mon2 = (struct monst *)0;
	mnum = big_to_little(egg->corpsenm);
	yours = egg->spe != 0;
	silent = (timeout != monstermoves);     /* hatched while away */

	/* only can hatch when in INVENT, FLOOR, MINVENT */
	if (get_obj_location(egg, &x, &y, 0)) {
	    hatchcount = rnd((int)egg->quan);
	    canseeit = cansee(x, y) && !silent;
	    if (!(mons[mnum].geno & G_UNIQ) &&
		   !(mvitals[mnum].mvflags & (G_GENOD | G_EXTINCT))) {
		for (i = hatchcount; i > 0; i--) {
		    if (!enexto(&cc, x, y, &mons[mnum]) ||
			 !(mon = makemon(&mons[mnum], cc.x, cc.y, NO_MINVENT)))
			break;
		    /* tame if your own egg hatches while you're on the
		       same dungeon level, or any dragon egg which hatches
		       while it's in your inventory */
		    if ((yours && !silent) ||
			(mon->data->mlet == S_DRAGON &&
				egg->where == OBJ_INVENT)) {
			if ((mon2 = tamedog(mon, (struct obj *)0)) != 0) {
			    mon = mon2;
			    if (egg->where == OBJ_INVENT &&
				    mon->data->mlet != S_DRAGON)
				mon->mtame = 20;
			}
		    }
		    if (mvitals[mnum].mvflags & G_EXTINCT)
			break;  /* just made last one */
		    mon2 = mon; /* in case makemon() fails on 2nd egg */
		}
		if (!mon) mon = mon2;
		hatchcount -= i;
		egg->quan -= (long)hatchcount;
	    }
	}
#if 0
	/*
	 * We could possibly hatch while migrating, but the code isn't
	 * set up for it...
	 */
	else if (obj->where == OBJ_MIGRATING) {
	    /*
	    We can do several things.  The first ones that come to
	    mind are:

	    + Create the hatched monster then place it on the migrating
	      mons list.  This is tough because all makemon() is made
	      to place the monster as well.    Makemon() also doesn't
	      lend itself well to splitting off a "not yet placed"
	      subroutine.

	    + Mark the egg as hatched, then place the monster when we
	      place the migrating objects.

	    + Or just kill any egg which gets sent to another level.
	      Falling is the usual reason such transportation occurs.
	    */
	    canseeit = FALSE;
	    mon = ???
	    }
#endif

	if (mon) {
	    char monnambuf[BUFSZ], carriedby[BUFSZ];
	    boolean siblings = (hatchcount > 1), redraw = FALSE;

	    if (canseeit) {
		Sprintf(monnambuf, "%s%s",
			siblings ? "some " : "",
			siblings ? makeplural(m_monnam(mon)) : a_monnam(mon));
		learn_egg_type(mnum);
	    }
	    switch (egg->where) {
		case OBJ_INVENT:
		    if (Blind)
			You_feel("%s %s from your pack!", something,
			    locomotion(mon->data, "drop"));
		    else
			You("see %s %s out of your pack!",
			    monnambuf, locomotion(mon->data, "drop"));
		    if (yours) {
			pline("%s cries sound like \"%s.\"",
			    siblings ? "Their" : "Its",
			    flags.female ? "mommy" : "daddy");
		    } else if (mon->data->mlet == S_DRAGON) {
			verbalize("Gleep!");            /* Mything eggs :-) */
		    }
		    break;

		case OBJ_FLOOR:
		    if (canseeit) {
			You("see %s hatch.", monnambuf);
			redraw = TRUE;  /* update egg's map location */
		    }
		    break;

		case OBJ_MINVENT:
		    if (canseeit) {
			/* egg carring monster might be invisible */
			if (canseemon(egg->ocarry))
			    Sprintf(carriedby, "%s pack",
				     s_suffix(a_monnam(egg->ocarry)));
			else
			    Strcpy(carriedby, "thin air");
			You("see %s %s out of %s!", monnambuf,
			    locomotion(mon->data, "drop"), carriedby);
		    }
		    break;
#if 0
		case OBJ_MIGRATING:
		    break;
#endif
		default:
		    impossible("egg hatched where? (%d)", (int)egg->where);
		    break;
	    }
	    if (egg->quan > 0) {
		/* still some eggs left */
		attach_egg_hatch_timeout(egg);
		if (egg->timed) {
		    /* replace ordinary egg timeout with a short one */
		    (void) stop_timer(HATCH_EGG, (genericptr_t)egg);
		    (void) start_timer((long)rnd(12), TIMER_OBJECT,
					HATCH_EGG, (genericptr_t)egg);
		}
	    } else {
		/* free egg here because we use it above */
		obj_extract_self(egg);
		obfree(egg, (struct obj *)0);
	    }
	    if (redraw) newsym(x, y);
	}
}

/* Learn to recognize eggs of the given type. */
void
learn_egg_type(mnum)
int mnum;
{
	/* baby monsters hatch from grown-up eggs */
	mnum = little_to_big(mnum);
	mvitals[mnum].mvflags |= MV_KNOWS_EGG;
	/* we might have just learned about other eggs being carried */
	update_inventory();
}

/* give a fumble message */
STATIC_OVL void
slip_or_trip()
{
	struct obj *otmp = vobj_at(u.ux, u.uy);
	const char *what, *pronoun;
	char buf[BUFSZ];

	if (otmp) {             /* trip over something in particular */
	    /*
		If there is only one item, it will have just been named
		during the move, so refer to by via pronoun; otherwise,
		if the top item has been or can be seen, refer to it by
		name; if not, look for rocks to trip over; trip over
		anonymous "something" if there aren't any rocks.
	     */
	    pronoun = otmp->quan == 1L ? "it" : Hallucination ? "they" : "them";
	    what = !otmp->nexthere ? pronoun :
		  (otmp->dknown || !Blind) ? doname(otmp) :
		  ((otmp = sobj_at(ROCK, u.ux, u.uy)) == 0 ? something :
		  (otmp->quan == 1L ? "a rock" : "some rocks"));
	    if (Hallucination) {
		what = strcpy(buf, what);
		buf[0] = highc(buf[0]);
		pline("Egads!  %s bite%s your %s!",
			what, (!otmp || otmp->quan == 1L) ? "s" : "",
			body_part(FOOT));
	    } else {
		You("trip over %s.", what);
	    }
	} else if (rn2(3) && is_ice(u.ux, u.uy)) {
	    You("%s on the ice.", rn2(2) ? "slip" : "slide");
	} else switch (rn2(4)) {
	    case 1:
		You("trip over your own %s.", Hallucination ?
			"elbow" : makeplural(body_part(FOOT)));
		break;
	    case 2:
		You("slip %s.", Hallucination ?
			"on a banana peel" : "and nearly fall");
		break;
	    case 3:
		You("flounder.");
		break;
	    default:
		You("stumble.");
		break;
	}
}

/* Print a lamp flicker message with tailer. */
static void
see_lamp_flicker(obj, tailer)
struct obj *obj;
const char *tailer;
{
	switch (obj->where) {
	    case OBJ_INVENT:
	    case OBJ_MINVENT:
                pline("%s flickers%s.", Yname2(obj), tailer);
		break;
	    case OBJ_FLOOR:
                You("see %s flicker%s.", an(xname(obj)), tailer);
		break;
	}
}

/* Print a dimming message for brass lanterns. */
static void
lantern_message(obj)
struct obj *obj;
{
	/* from adventure */
	switch (obj->where) {
	    case OBJ_INVENT:
		Your("lantern is getting dim.");
		if (Hallucination)
		    pline("Batteries have not been invented yet.");
		break;
	    case OBJ_FLOOR:
		You("see a lantern getting dim.");
		break;
	    case OBJ_MINVENT:
		pline("%s lantern is getting dim.",
		    s_suffix(Monnam(obj->ocarry)));
		break;
	}
}

/*
 * Timeout callback for for objects that are burning. E.g. lamps, candles.
 * See begin_burn() for meanings of obj->age and obj->spe.
 */
void
burn_object(arg, timeout)
genericptr_t arg;
long timeout;
{
	struct obj *obj = (struct obj *) arg;
	boolean canseeit, many, menorah, need_newsym;
	xchar x, y;
	char whose[BUFSZ];

	menorah = obj->otyp == CANDELABRUM_OF_INVOCATION;
	many = menorah ? obj->spe > 1 : obj->quan > 1L;

	/* timeout while away */
	if (timeout != monstermoves) {
	    long how_long = monstermoves - timeout;

	    if (how_long >= obj->age) {
		obj->age = 0;
		end_burn(obj, FALSE);

		if (menorah) {
		    obj->spe = 0;       /* no more candles */
		} else if (Is_candle(obj) || obj->otyp == POT_OIL) {
		    /* get rid of candles and burning oil potions */
		    obj_extract_self(obj);
		    obfree(obj, (struct obj *)0);
		    obj = (struct obj *) 0;
		}

	    } else {
		obj->age -= how_long;
		begin_burn(obj, TRUE);
	    }
	    return;
	}

	/* only interested in INVENT, FLOOR, and MINVENT */
	if (get_obj_location(obj, &x, &y, 0)) {
	    canseeit = cansee(x, y);
	    /* set up `whose[]' to be "Your" or "Fred's" or "The goblin's" */
	    (void) Shk_Your(whose, obj);
	} else {
	    canseeit = FALSE;
	}
	need_newsym = FALSE;

	/* obj->age is the age remaining at this point.  */
	switch (obj->otyp) {
	    case POT_OIL:
		    /* this should only be called when we run out */
		    if (canseeit) {
			switch (obj->where) {
			    case OBJ_INVENT:
			    case OBJ_MINVENT:
				pline("%s potion of oil has burnt away.",
				    whose);
				break;
			    case OBJ_FLOOR:
				You("see a burning potion of oil go out.");
				need_newsym = TRUE;
				break;
			}
		    }
		    end_burn(obj, FALSE);       /* turn off light source */
		    obj_extract_self(obj);
		    obfree(obj, (struct obj *)0);
		    obj = (struct obj *) 0;
		    break;

	    case BRASS_LANTERN:
	    case OIL_LAMP:
		switch((int)obj->age) {
		    case 150:
		    case 100:
		    case 50:
			if (canseeit) {
			    if (obj->otyp == BRASS_LANTERN)
				lantern_message(obj);
			    else
				see_lamp_flicker(obj,
				    obj->age == 50L ? " considerably" : "");
			}
			break;

		    case 25:
			if (canseeit) {
			    if (obj->otyp == BRASS_LANTERN)
				lantern_message(obj);
			    else {
				switch (obj->where) {
				    case OBJ_INVENT:
				    case OBJ_MINVENT:
					pline("%s %s seems about to go out.",
					    whose, xname(obj));
					break;
				    case OBJ_FLOOR:
					You("see %s about to go out.",
					    an(xname(obj)));
					break;
				}
			    }
			}
			break;

		    case 0:
			/* even if blind you'll know if holding it */
			if (canseeit || obj->where == OBJ_INVENT) {
			    switch (obj->where) {
				case OBJ_INVENT:
				case OBJ_MINVENT:
				    if (obj->otyp == BRASS_LANTERN)
					pline("%s lantern has run out of power.",
					    whose);
				    else
					pline("%s %s has gone out.",
					    whose, xname(obj));
				    break;
				case OBJ_FLOOR:
				    if (obj->otyp == BRASS_LANTERN)
					You("see a lantern run out of power.");
				    else
					You("see %s go out.",
					    an(xname(obj)));
				    break;
			    }
			}
			end_burn(obj, FALSE);
			break;

		    default:
			/*
			 * Someone added fuel to the lamp while it was
			 * lit.  Just fall through and let begin burn
			 * handle the new age.
			 */
			break;
		}

		if (obj->age)
		    begin_burn(obj, TRUE);

		break;

	    case CANDELABRUM_OF_INVOCATION:
	    case TALLOW_CANDLE:
	    case WAX_CANDLE:
		switch (obj->age) {
		    case 75:
			if (canseeit)
			    switch (obj->where) {
				case OBJ_INVENT:
				case OBJ_MINVENT:
				    pline("%s %scandle%s getting short.",
					whose,
					menorah ? "candelabrum's " : "",
					many ? "s are" : " is");
				    break;
				case OBJ_FLOOR:
				    You("see %scandle%s getting short.",
					    menorah ? "a candelabrum's " :
						many ? "some " : "a ",
					    many ? "s" : "");
				    break;
			    }
			break;

		    case 15:
			if (canseeit)
			    switch (obj->where) {
				case OBJ_INVENT:
				case OBJ_MINVENT:
				    pline(
					"%s %scandle%s flame%s flicker%s low!",
					    whose,
					    menorah ? "candelabrum's " : "",
					    many ? "s'" : "'s",
					    many ? "s" : "",
					    many ? "" : "s");
				    break;
				case OBJ_FLOOR:
				    You("see %scandle%s flame%s flicker low!",
					    menorah ? "a candelabrum's " :
						many ? "some " : "a ",
					    many ? "s'" : "'s",
					    many ? "s" : "");
				    break;
			    }
			break;

		    case 0:
			/* we know even if blind and in our inventory */
			if (canseeit || obj->where == OBJ_INVENT) {
			    if (menorah) {
				switch (obj->where) {
				    case OBJ_INVENT:
				    case OBJ_MINVENT:
					pline("%s candelabrum's flame%s.",
					    whose,
					    many ? "s die" : " dies");
					break;
				    case OBJ_FLOOR:
					You("see a candelabrum's flame%s die.",
						many ? "s" : "");
					break;
				}
			    } else {
				switch (obj->where) {
				    case OBJ_INVENT:
				    case OBJ_MINVENT:
					pline("%s %s %s consumed!",
					    whose,
					    xname(obj),
					    many ? "are" : "is");
					break;
				    case OBJ_FLOOR:
					/*
					You see some wax candles consumed!
					You see a wax candle consumed!
					*/
					You("see %s%s consumed!",
					    many ? "some " : "",
					    many ? xname(obj):an(xname(obj)));
					need_newsym = TRUE;
					break;
				}

				/* post message */
				pline(Hallucination ?
					(many ? "They shriek!" :
						"It shrieks!") :
					Blind ? "" :
					    (many ? "Their flames die." :
						    "Its flame dies."));
			    }
			}
			end_burn(obj, FALSE);

			if (menorah) {
			    obj->spe = 0;
			} else {
			    obj_extract_self(obj);
			    obfree(obj, (struct obj *)0);
			    obj = (struct obj *) 0;
			}
			break;

		    default:
			/*
			 * Someone added fuel (candles) to the menorah while
			 * it was lit.  Just fall through and let begin burn
			 * handle the new age.
			 */
			break;
		}

		if (obj && obj->age)
		    begin_burn(obj, TRUE);

		break;

	    default:
		impossible("burn_object: unexpeced obj %s", xname(obj));
		break;
	}
	if (need_newsym) newsym(x, y);
}

/*
 * Start a burn timeout on the given object. If not "already lit" then
 * create a light source for the vision system.  There had better not
 * be a burn already running on the object.
 *
 * Magic lamps stay lit as long as there's a genie inside, so don't start
 * a timer.
 *
 * Burn rules:
 *      potions of oil, lamps & candles:
 *              age = # of turns of fuel left
 *              spe = <unused>
 *
 *      magic lamps:
 *              age = <unused>
 *              spe = 0 not lightable, 1 lightable forever
 *
 *      candelabrum:
 *              age = # of turns of fuel left
 *              spe = # of candles
 *
 * Once the burn begins, the age will be set to the amount of fuel
 * remaining _once_the_burn_finishes_.  If the burn is terminated
 * early then fuel is added back.
 *
 * This use of age differs from the use of age for corpses and eggs.
 * For the latter items, age is when the object was created, so we
 * know when it becomes "bad".
 *
 * This is a "silent" routine - it should not print anything out.
 */
void
begin_burn(obj, already_lit)
	struct obj *obj;
	boolean already_lit;
{
	int radius = 3;
	long turns = 0;
	boolean do_timer = TRUE;

	if (obj->age == 0 && (obj->otyp != MAGIC_LAMP ||
			      obj->otyp != MAGIC_CANDLE)) return;

	switch (obj->otyp) {
	    case MAGIC_LAMP:
	    case MAGIC_CANDLE:
		obj->lamplit = 1;
		do_timer = FALSE;
		if (obj->otyp == MAGIC_CANDLE) obj->age = 300L;
		break;

	    case POT_OIL:
		turns = obj->age;
		radius = 1;     /* very dim light */
		break;

	    case BRASS_LANTERN:
	    case OIL_LAMP:
		/* magic times are 150, 100, 50, 25, and 0 */
		if (obj->age > 150L)
		    turns = obj->age - 150L;
		else if (obj->age > 100L)
		    turns = obj->age - 100L;
		else if (obj->age > 50L)
		    turns = obj->age - 50L;
		else if (obj->age > 25L)
		    turns = obj->age - 25L;
		else
		    turns = obj->age;
		break;

	    case CANDELABRUM_OF_INVOCATION:
	    case TALLOW_CANDLE:
	    case WAX_CANDLE:
		/* magic times are 75, 15, and 0 */
		if (obj->age > 75L)
		    turns = obj->age - 75L;
		else if (obj->age > 15L)
		    turns = obj->age - 15L;
		else
		    turns = obj->age;
		break;

	    default:
		impossible("begin burn: unexpected %s", xname(obj));
		turns = obj->age;
		break;
	}

	if (do_timer) {
	    if (start_timer(turns, TIMER_OBJECT,
					BURN_OBJECT, (genericptr_t)obj)) {
		obj->lamplit = 1;
		obj->age -= turns;
		if (obj->where == OBJ_INVENT && !already_lit)
		    update_inventory();
	    } else {
		obj->lamplit = 0;
	    }
	}

	if (obj->lamplit && !already_lit) {
	    xchar x, y;

	    if (get_obj_location(obj, &x, &y, CONTAINED_TOO|BURIED_TOO))
		new_light_source(x, y, radius, LS_OBJECT, (genericptr_t) obj);
	    else
		impossible("begin_burn: can't get obj position");
	}
}

/*
 * Stop a burn timeout on the given object if timer attached.  Darken
 * light source.
 */
void
end_burn(obj, timer_attached)
	struct obj *obj;
	boolean timer_attached;
{
	long expire_time;

	if (!obj->lamplit) {
	    impossible("end_burn: obj %s not lit", xname(obj));
	    return;
	}

	del_light_source(LS_OBJECT, (genericptr_t) obj);

	if (obj->otyp == MAGIC_LAMP ||
	    obj->otyp == MAGIC_CANDLE ) timer_attached = FALSE;
	if (timer_attached) {
	    expire_time = stop_timer(BURN_OBJECT, (genericptr_t) obj);
	    if (expire_time)
		/* restore unused time */
		obj->age += expire_time - monstermoves;
	    else
		impossible("end_burn: obj %s not timed!", xname(obj));
	}
	obj->lamplit = 0;

	if (obj->where == OBJ_INVENT)
	    update_inventory();
}

void
do_storms()
{
    int nstrike;
    register int x, y;
    int dirx, diry;
    int count;

    /* no lightning if not the air level or too often, even then */
    if(!Is_airlevel(&u.uz) || rn2(8))
	return;

    /* the number of strikes is 8-log2(nstrike) */
    for(nstrike = rnd(64); nstrike <= 64; nstrike *= 2) {
	count = 0;
	do {
	    x = rnd(COLNO-1);
	    y = rn2(ROWNO);
	} while (++count < 100 && levl[x][y].typ != CLOUD);

	if(count < 100) {
	    dirx = rn2(3) - 1;
	    diry = rn2(3) - 1;
	    if(dirx != 0 || diry != 0)
		buzz(-15, /* "monster" LIGHTNING spell */
		     8, x, y, dirx, diry);
	}
    }

    if(levl[u.ux][u.uy].typ == CLOUD) {
	/* inside a cloud during a thunder storm is deafening */
	pline("Kaboom!!!  Boom!!  Boom!!");
	if(!u.uinvulnerable) {
	    stop_occupation();
	    nomul(-3);
	}
    } else
	You_hear("a rumbling noise.");
}
#endif /* OVL1 */


#ifdef OVL0
/* ------------------------------------------------------------------------- */
/*
 * Generic Timeout Functions.
 *
 * Interface:
 *
 * General:
 *      boolean start_timer(long timeout,short kind,short func_index,
 *                                                      genericptr_t arg)
 *              Start a timer of kind 'kind' that will expire at time
 *              monstermoves+'timeout'.  Call the function at 'func_index'
 *              in the timeout table using argument 'arg'.  Return TRUE if
 *              a timer was started.  This places the timer on a list ordered
 *              "sooner" to "later".  If an object, increment the object's
 *              timer count.
 *
 *      long stop_timer(short func_index, genericptr_t arg)
 *              Stop a timer specified by the (func_index, arg) pair.  This
 *              assumes that such a pair is unique.  Return the time the
 *              timer would have gone off.  If no timer is found, return 0.
 *              If an object, decrement the object's timer count.
 *
 *      void run_timers(void)
 *              Call timers that have timed out.
 *
 *
 * Save/Restore:
 *      void save_timers(int fd, int mode, int range)
 *              Save all timers of range 'range'.  Range is either global
 *              or local.  Global timers follow game play, local timers
 *              are saved with a level.  Object and monster timers are
 *              saved using their respective id's instead of pointers.
 *
 *      void restore_timers(int fd, int range, boolean ghostly, long adjust)
 *              Restore timers of range 'range'.  If from a ghost pile,
 *              adjust the timeout by 'adjust'.  The object and monster
 *              ids are not restored until later.
 *
 *      void relink_timers(boolean ghostly)
 *              Relink all object and monster timers that had been saved
 *              using their object's or monster's id number.
 *
 * Object Specific:
 *      void obj_move_timers(struct obj *src, struct obj *dest)
 *              Reassign all timers from src to dest.
 *
 *      void obj_split_timers(struct obj *src, struct obj *dest)
 *              Duplicate all timers assigned to src and attach them to dest.
 *
 *      void obj_stop_timers(struct obj *obj)
 *              Stop all timers attached to obj.
 */


typedef struct fe {
    struct fe *next;            /* next item in chain */
    long timeout;               /* when we time out */
    unsigned long tid;          /* timer ID */
    short kind;                 /* kind of use */
    short func_index;           /* what to call when we time out */
    genericptr_t arg;           /* pointer to timeout argument */
    Bitfield (needs_fixup,1);   /* does arg need to be patched? */
} timer_element;

#ifdef WIZARD
static const char *FDECL(kind_name, (SHORT_P));
static void FDECL(print_queue, (winid, timer_element *));
#endif
static void FDECL(insert_timer, (timer_element *));
static timer_element *FDECL(remove_timer, (timer_element **, SHORT_P,
								genericptr_t));
static boolean FDECL(mon_is_local, (struct monst *));
static boolean FDECL(timer_is_local, (timer_element *));
static int FDECL(maybe_write_timer, (int, int, BOOLEAN_P));
static void FDECL(write_timer, (int, timer_element *)); /* Damn typedef write_timer is in the middle */

/* ordered timer list */
static timer_element *timer_base;               /* "active" */
static unsigned long timer_id = 1;

/* If defined, then include names when printing out the timer queue */
#define VERBOSE_TIMER

typedef struct {
    timeout_proc f;
#ifdef VERBOSE_TIMER
    const char *name;
# define TTAB(a, b) {a,b}
#else
# define TTAB(a, b) {a}
#endif
} ttable;

/* table of timeout functions */
static ttable timeout_funcs[NUM_TIME_FUNCS] = {
	TTAB(rot_organic,   "rot_organic"),
	TTAB(rot_corpse,    "rot_corpse"),
	TTAB(revive_mon,    "revive_mon"),
	TTAB(burn_object,   "burn_object"),
	TTAB(hatch_egg,     "hatch_egg"),
#ifdef UNPOLYPILE
	TTAB(unpoly_mon,    "unpoly_mon"),
	TTAB(unpoly_obj,    "unpoly_obj")
#else
	TTAB(unpoly_mon,    "unpoly_mon")
#endif
};
#undef TTAB


#if defined(WIZARD)

static const char *
kind_name(kind)
    short kind;
{
    switch (kind) {
	case TIMER_LEVEL: return "level";
	case TIMER_GLOBAL: return "global";
	case TIMER_OBJECT: return "object";
	case TIMER_MONSTER: return "monster";
    }
    return "unknown";
}

static void
print_queue(win, base)
    winid win;
    timer_element *base;
{
    timer_element *curr;
    char buf[BUFSZ], arg_address[20];

    if (!base) {
	putstr(win, 0, "<empty>");
    } else {
	putstr(win, 0, "timeout  id   kind   call");
	for (curr = base; curr; curr = curr->next) {
#ifdef VERBOSE_TIMER
	    Sprintf(buf, " %4ld   %4ld  %-6s %s(%s)",
		curr->timeout, curr->tid, kind_name(curr->kind),
		timeout_funcs[curr->func_index].name,
		fmt_ptr((genericptr_t)curr->arg, arg_address));
#else
	    Sprintf(buf, " %4ld   %4ld  %-6s #%d(%s)",
		curr->timeout, curr->tid, kind_name(curr->kind),
		curr->func_index,
		fmt_ptr((genericptr_t)curr->arg, arg_address));
#endif
	    putstr(win, 0, buf);
	}
    }
}

int
wiz_timeout_queue()
{
    winid win;
    char buf[BUFSZ];

    win = create_nhwindow(NHW_MENU);    /* corner text window */
    if (win == WIN_ERR) return 0;

    Sprintf(buf, "Current time = %ld.", monstermoves);
    putstr(win, 0, buf);
    putstr(win, 0, "");
    putstr(win, 0, "Active timeout queue:");
    putstr(win, 0, "");
    print_queue(win, timer_base);

    display_nhwindow(win, FALSE);
    destroy_nhwindow(win);

    return 0;
}

void
timer_sanity_check()
{
    timer_element *curr;
    char obj_address[20];

    /* this should be much more complete */
    for (curr = timer_base; curr; curr = curr->next)
	if (curr->kind == TIMER_OBJECT) {
	    struct obj *obj = (struct obj *) curr->arg;
	    if (obj->timed == 0) {
		pline("timer sanity: untimed obj %s, timer %ld",
		      fmt_ptr((genericptr_t)obj, obj_address), curr->tid);
	    }
	}
}

#endif /* WIZARD */


/*
 * Pick off timeout elements from the global queue and call their functions.
 * Do this until their time is less than or equal to the move count.
 */
void
run_timers()
{
    timer_element *curr;

    /*
     * Always use the first element.  Elements may be added or deleted at
     * any time.  The list is ordered, we are done when the first element
     * is in the future.
     */
    while (timer_base && timer_base->timeout <= monstermoves) {
	curr = timer_base;
	timer_base = curr->next;

	if (curr->kind == TIMER_OBJECT) ((struct obj *)(curr->arg))->timed--;
	(*timeout_funcs[curr->func_index].f)(curr->arg, curr->timeout);
	free((genericptr_t) curr);
    }
}


/*
 * Start a timer.  Return TRUE if successful.
 */
boolean
start_timer(when, kind, func_index, arg)
long when;
short kind;
short func_index;
genericptr_t arg;
{
    timer_element *gnu;

    if (func_index < 0 || func_index >= NUM_TIME_FUNCS)
	panic("start_timer");

    gnu = (timer_element *) alloc(sizeof(timer_element));
    gnu->next = 0;
    gnu->tid = timer_id++;
    gnu->timeout = monstermoves + when;
    gnu->kind = kind;
    gnu->needs_fixup = 0;
    gnu->func_index = func_index;
    gnu->arg = arg;
    insert_timer(gnu);

    if (kind == TIMER_OBJECT)   /* increment object's timed count */
	((struct obj *)arg)->timed++;

    /* should check for duplicates and fail if any */
    return TRUE;
}


/*
 * Remove the timer from the current list and free it up.  Return the time
 * it would have gone off, 0 if not found.
 */
long
stop_timer(func_index, arg)
short func_index;
genericptr_t arg;
{
    timer_element *doomed;
    long timeout;

    doomed = remove_timer(&timer_base, func_index, arg);

    if (doomed) {
	timeout = doomed->timeout;
	if (doomed->kind == TIMER_OBJECT)
	    ((struct obj *)arg)->timed--;
	free((genericptr_t) doomed);
	return timeout;
    }
    return 0;
}


/*
 * Move all object timers from src to dest, leaving src untimed.
 */
void
obj_move_timers(src, dest)
    struct obj *src, *dest;
{
    int count;
    timer_element *curr;

    for (count = 0, curr = timer_base; curr; curr = curr->next)
	if (curr->kind == TIMER_OBJECT && curr->arg == (genericptr_t)src) {
	    curr->arg = (genericptr_t) dest;
	    dest->timed++;
	    count++;
	}
    if (count != src->timed)
	panic("obj_move_timers");
    src->timed = 0;
}


/*
 * Find all object timers and duplicate them for the new object "dest".
 */
void
obj_split_timers(src, dest)
    struct obj *src, *dest;
{
    timer_element *curr, *next_timer=0;

    for (curr = timer_base; curr; curr = next_timer) {
	next_timer = curr->next;        /* things may be inserted */
	if (curr->kind == TIMER_OBJECT && curr->arg == (genericptr_t)src) {
	    (void) start_timer(curr->timeout-monstermoves, TIMER_OBJECT,
					curr->func_index, (genericptr_t)dest);
	}
    }
}


/*
 * Stop all timers attached to this object.  We can get away with this because
 * all object pointers are unique.
 */
void
obj_stop_timers(obj)
    struct obj *obj;
{
    timer_element *curr, *prev, *next_timer=0;

    for (prev = 0, curr = timer_base; curr; curr = next_timer) {
	next_timer = curr->next;
	if (curr->kind == TIMER_OBJECT && curr->arg == (genericptr_t)obj) {
	    if (prev)
		prev->next = curr->next;
	    else
		timer_base = curr->next;
	    free((genericptr_t) curr);
	} else {
	    prev = curr;
	}
    }
    obj->timed = 0;
}


/* Insert timer into the global queue */
static void
insert_timer(gnu)
    timer_element *gnu;
{
    timer_element *curr, *prev;

    for (prev = 0, curr = timer_base; curr; prev = curr, curr = curr->next)
	if (curr->timeout >= gnu->timeout) break;

    gnu->next = curr;
    if (prev)
	prev->next = gnu;
    else
	timer_base = gnu;
}


static timer_element *
remove_timer(base, func_index, arg)
timer_element **base;
short func_index;
genericptr_t arg;
{
    timer_element *prev, *curr;

    for (prev = 0, curr = *base; curr; prev = curr, curr = curr->next)
	if (curr->func_index == func_index && curr->arg == arg) break;

    if (curr) {
	if (prev)
	    prev->next = curr->next;
	else
	    *base = curr->next;
    }

    return curr;
}

static void
write_timer(fd, timer)
    int fd;
    timer_element *timer;
{
    genericptr_t arg_save;

    switch (timer->kind) {
	case TIMER_GLOBAL:
	case TIMER_LEVEL:
	    /* assume no pointers in arg */
	    bwrite(fd, (genericptr_t) timer, sizeof(timer_element));
	    break;

	case TIMER_OBJECT:
	    if (timer->needs_fixup)
		bwrite(fd, (genericptr_t)timer, sizeof(timer_element));
	    else {
		/* replace object pointer with id */
		arg_save = timer->arg;
		timer->arg = (genericptr_t)((struct obj *)timer->arg)->o_id;
		timer->needs_fixup = 1;
		bwrite(fd, (genericptr_t)timer, sizeof(timer_element));
		timer->arg = arg_save;
		timer->needs_fixup = 0;
	    }
	    break;

	case TIMER_MONSTER:
	    if (timer->needs_fixup)
		bwrite(fd, (genericptr_t)timer, sizeof(timer_element));
	    else {
		/* replace monster pointer with id */
		arg_save = timer->arg;
		timer->arg = (genericptr_t)((struct monst *)timer->arg)->m_id;
		timer->needs_fixup = 1;
		bwrite(fd, (genericptr_t)timer, sizeof(timer_element));
		timer->arg = arg_save;
		timer->needs_fixup = 0;
	    }
	    break;

	default:
	    panic("write_timer");
	    break;
    }
}


/*
 * Return TRUE if the object will stay on the level when the level is
 * saved.
 */
boolean
obj_is_local(obj)
    struct obj *obj;
{
    switch (obj->where) {
	case OBJ_INVENT:
	case OBJ_MIGRATING:     return FALSE;
	case OBJ_FLOOR:
	case OBJ_BURIED:        return TRUE;
	case OBJ_CONTAINED:     return obj_is_local(obj->ocontainer);
	case OBJ_MINVENT:       return mon_is_local(obj->ocarry);
    }
    panic("obj_is_local");
    return FALSE;
}


/*
 * Return TRUE if the given monster will stay on the level when the
 * level is saved.
 */
static boolean
mon_is_local(mon)
struct monst *mon;
{
    struct monst *curr;

    for (curr = migrating_mons; curr; curr = curr->nmon)
	if (curr == mon) return FALSE;
    /* `mydogs' is used during level changes, never saved and restored */
    for (curr = mydogs; curr; curr = curr->nmon)
	if (curr == mon) return FALSE;
    return TRUE;
}


/*
 * Return TRUE if the timer is attached to something that will stay on the
 * level when the level is saved.
 */
static boolean
timer_is_local(timer)
    timer_element *timer;
{
    switch (timer->kind) {
	case TIMER_LEVEL:       return TRUE;
	case TIMER_GLOBAL:      return FALSE;
	case TIMER_OBJECT:      return obj_is_local((struct obj *)timer->arg);
	case TIMER_MONSTER:     return mon_is_local((struct monst *)timer->arg);
    }
    panic("timer_is_local");
    return FALSE;
}


/*
 * Part of the save routine.  Count up the number of timers that would
 * be written.  If write_it is true, actually write the timer.
 */
static int
maybe_write_timer(fd, range, write_it)
    int fd, range;
    boolean write_it;
{
    int count = 0;
    timer_element *curr;

    for (curr = timer_base; curr; curr = curr->next) {
	if (range == RANGE_GLOBAL) {
	    /* global timers */

	    if (!timer_is_local(curr)) {
		count++;
		if (write_it) write_timer(fd, curr);
	    }

	} else {
	    /* local timers */

	    if (timer_is_local(curr)) {
		count++;
		if (write_it) write_timer(fd, curr);
	    }

	}
    }

    return count;
}


/*
 * Save part of the timer list.  The parameter 'range' specifies either
 * global or level timers to save.  The timer ID is saved with the global
 * timers.
 *
 * Global range:
 *              + timeouts that follow the hero (global)
 *              + timeouts that follow obj & monst that are migrating
 *
 * Level range:
 *              + timeouts that are level specific (e.g. storms)
 *              + timeouts that stay with the level (obj & monst)
 */
void
save_timers(fd, mode, range)
    int fd, mode, range;
{
    timer_element *curr, *prev, *next_timer=0;
    int count;

    if (perform_bwrite(mode)) {
	if (range == RANGE_GLOBAL)
	    bwrite(fd, (genericptr_t) &timer_id, sizeof(timer_id));

	count = maybe_write_timer(fd, range, FALSE);
	bwrite(fd, (genericptr_t) &count, sizeof count);
	(void) maybe_write_timer(fd, range, TRUE);
    }

    if (release_data(mode)) {
	for (prev = 0, curr = timer_base; curr; curr = next_timer) {
	    next_timer = curr->next;    /* in case curr is removed */

	    if ( !(!!(range == RANGE_LEVEL) ^ !!timer_is_local(curr)) ) {
		if (prev)
		    prev->next = curr->next;
		else
		    timer_base = curr->next;
		free((genericptr_t) curr);
		/* prev stays the same */
	    } else {
		prev = curr;
	    }
	}
    }
}


/*
 * Pull in the structures from disk, but don't recalculate the object and
 * monster pointers.
 */
void
restore_timers(fd, range, ghostly, adjust)
    int fd, range;
    boolean ghostly;    /* restoring from a ghost level */
    long adjust;        /* how much to adjust timeout */
{
    int count;
    timer_element *curr;

    if (range == RANGE_GLOBAL)
	mread(fd, (genericptr_t) &timer_id, sizeof timer_id);

    /* restore elements */
    mread(fd, (genericptr_t) &count, sizeof count);
    while (count-- > 0) {
	curr = (timer_element *) alloc(sizeof(timer_element));
	mread(fd, (genericptr_t) curr, sizeof(timer_element));
	if (ghostly)
	    curr->timeout += adjust;
	insert_timer(curr);
    }
}


/* reset all timers that are marked for reseting */
void
relink_timers(ghostly)
    boolean ghostly;
{
    timer_element *curr;
    unsigned nid;

    for (curr = timer_base; curr; curr = curr->next) {
	if (curr->needs_fixup) {
	    if (curr->kind == TIMER_OBJECT) {
		if (ghostly) {
		    if (!lookup_id_mapping((unsigned)curr->arg, &nid))
			panic("relink_timers 1");
		} else
		    nid = (unsigned) curr->arg;
		curr->arg = (genericptr_t) find_oid(nid);
		if (!curr->arg) panic("cant find o_id %d", nid);
		curr->needs_fixup = 0;
	    } else if (curr->kind == TIMER_MONSTER) {
/*                panic("relink_timers: no monster timer implemented");*/
                /* WAC attempt to relink monster timers based on above
                 * and light source code
                 */
		if (ghostly) {
		    if (!lookup_id_mapping((unsigned)curr->arg, &nid))
                        panic("relink_timers 1b");
		} else
		    nid = (unsigned) curr->arg;
                curr->arg = (genericptr_t) find_mid(nid);
		if (!curr->arg) panic("cant find o_id %d", nid);
		curr->needs_fixup = 0;
	    } else
		panic("relink_timers 2");
	}
    }
}

#endif /* OVL0 */

/*timeout.c*/
