Source:NetHack 3.4.0/steal.c

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Below is the full text to steal.c from the source code of NetHack 3.4.0. To link to a particular line, write [[NetHack 3.4.0/steal.c#line123]], for example.

Warning! This is the source code from an old release. For the latest release, see Source code

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1.    /*	SCCS Id: @(#)steal.c	3.4	2002/01/04	*/
2.    /* Copyright (c) Stichting Mathematisch Centrum, Amsterdam, 1985. */
3.    /* NetHack may be freely redistributed.  See license for details. */
4.    
5.    #include "hack.h"
6.    
7.    STATIC_PTR int NDECL(stealarm);
8.    
9.    #ifdef OVLB
10.   STATIC_DCL const char *FDECL(equipname, (struct obj *));
11.   
12.   STATIC_OVL const char *
13.   equipname(otmp)
14.   register struct obj *otmp;
15.   {
16.   	return (
17.   #ifdef TOURIST
18.   		(otmp == uarmu) ? "shirt" :
19.   #endif
20.   		(otmp == uarmf) ? "boots" :
21.   		(otmp == uarms) ? "shield" :
22.   		(otmp == uarmg) ? "gloves" :
23.   		(otmp == uarmc) ? cloak_simple_name(otmp) :
24.   		(otmp == uarmh) ? "helmet" : "armor");
25.   }
26.   
27.   #ifndef GOLDOBJ
28.   long		/* actually returns something that fits in an int */
29.   somegold()
30.   {
31.   #ifdef LINT	/* long conv. ok */
32.   	return(0L);
33.   #else
34.   	return (long)( (u.ugold < 100) ? u.ugold :
35.   		(u.ugold > 10000) ? rnd(10000) : rnd((int) u.ugold) );
36.   #endif
37.   }
38.   
39.   void
40.   stealgold(mtmp)
41.   register struct monst *mtmp;
42.   {
43.   	register struct obj *gold = g_at(u.ux, u.uy);
44.   	register long tmp;
45.   
46.   	if (gold && ( !u.ugold || gold->quan > u.ugold || !rn2(5))) {
47.   	    mtmp->mgold += gold->quan;
48.   	    delobj(gold);
49.   	    newsym(u.ux, u.uy);
50.   	    pline("%s quickly snatches some gold from between your %s!",
51.   		    Monnam(mtmp), makeplural(body_part(FOOT)));
52.   	    if(!u.ugold || !rn2(5)) {
53.   		if (!tele_restrict(mtmp)) rloc(mtmp);
54.   		monflee(mtmp, 0, FALSE, FALSE);
55.   	    }
56.   	} else if(u.ugold) {
57.   	    u.ugold -= (tmp = somegold());
58.   	    Your("purse feels lighter.");
59.   	    mtmp->mgold += tmp;
60.   	if (!tele_restrict(mtmp)) rloc(mtmp);
61.   	    monflee(mtmp, 0, FALSE, FALSE);
62.   	    flags.botl = 1;
63.   	}
64.   }
65.   
66.   #else /* !GOLDOBJ */
67.   
68.   long		/* actually returns something that fits in an int */
69.   somegold(umoney)
70.   long umoney;
71.   {
72.   #ifdef LINT	/* long conv. ok */
73.   	return(0L);
74.   #else
75.   	return (long)( (umoney < 100) ? umoney :
76.   		(umoney > 10000) ? rnd(10000) : rnd((int) umoney) );
77.   #endif
78.   }
79.   
80.   /*
81.   Find the first (and hopefully only) gold object in a chain.
82.   Used when leprechaun (or you as leprechaun) looks for
83.   someone else's gold.  Returns a pointer so the gold may
84.   be seized without further searching.
85.   May search containers too.
86.   Deals in gold only, as leprechauns don't care for lesser coins.
87.   */
88.   struct obj *
89.   findgold(chain)
90.   register struct obj *chain;
91.   {
92.           while (chain && chain->otyp != GOLD_PIECE) chain = chain->nobj;
93.           return chain;
94.   }
95.   
96.   /* 
97.   Steal gold coins only.  Leprechauns don't care for lesser coins.
98.   */
99.   void
100.  stealgold(mtmp)
101.  register struct monst *mtmp;
102.  {
103.  	register struct obj *fgold = g_at(u.ux, u.uy);
104.  	register struct obj *ygold;
105.  	register long tmp;
106.  
107.          /* skip lesser coins on the floor */        
108.          while (fgold && fgold->otyp != GOLD_PIECE) fgold = fgold->nexthere; 
109.  
110.          /* Do you have real gold? */
111.          ygold = findgold(invent);
112.  
113.  	if (fgold && ( !ygold || fgold->quan > ygold->quan || !rn2(5))) {
114.              obj_extract_self(fgold);
115.  	    add_to_minv(mtmp, fgold);
116.  	    newsym(u.ux, u.uy);
117.  	    pline("%s quickly snatches some gold from between your %s!",
118.  		    Monnam(mtmp), makeplural(body_part(FOOT)));
119.  	    if(!ygold || !rn2(5)) {
120.  		if (!tele_restrict(mtmp)) rloc(mtmp);
121.  		monflee(mtmp, 0, FALSE, FALSE);
122.  	    }
123.  	} else if(ygold) {
124.              const int gold_price = objects[GOLD_PIECE].oc_cost;
125.  	    tmp = (somegold(money_cnt(invent)) + gold_price - 1) / gold_price;
126.  	    tmp = min(tmp, ygold->quan);
127.              if (tmp < ygold->quan) ygold = splitobj(ygold, tmp);
128.              freeinv(ygold);
129.              add_to_minv(mtmp, ygold);
130.  	    Your("purse feels lighter.");
131.  	    if (!tele_restrict(mtmp)) rloc(mtmp);
132.  	    monflee(mtmp, 0, FALSE, FALSE);
133.  	    flags.botl = 1;
134.  	}
135.  }
136.  #endif /* GOLDOBJ */
137.  
138.  /* steal armor after you finish taking it off */
139.  unsigned int stealoid;		/* object to be stolen */
140.  unsigned int stealmid;		/* monster doing the stealing */
141.  
142.  STATIC_PTR int
143.  stealarm()
144.  {
145.  	register struct monst *mtmp;
146.  	register struct obj *otmp;
147.  
148.  	for(otmp = invent; otmp; otmp = otmp->nobj) {
149.  	    if(otmp->o_id == stealoid) {
150.  		for(mtmp = fmon; mtmp; mtmp = mtmp->nmon) {
151.  		    if(mtmp->m_id == stealmid) {
152.  			if(DEADMONSTER(mtmp)) impossible("stealarm(): dead monster stealing"); 
153.  			if(!dmgtype(mtmp->data, AD_SITM)) /* polymorphed */
154.  			    goto botm;
155.  			if(otmp->unpaid)
156.  			    subfrombill(otmp, shop_keeper(*u.ushops));
157.  			freeinv(otmp);
158.  			pline("%s steals %s!", Monnam(mtmp), doname(otmp));
159.  			(void) mpickobj(mtmp,otmp);	/* may free otmp */
160.  			monflee(mtmp, 0, FALSE, FALSE);
161.  			if (!tele_restrict(mtmp)) rloc(mtmp);
162.  		        break;
163.  		    }
164.  		}
165.  		break;
166.  	    }
167.  	}
168.  botm:   stealoid = 0;
169.  	return 0;
170.  }
171.  
172.  /* An object you're wearing has been taken off by a monster (theft or
173.     seduction).  Also used if a worn item gets transformed (stone to flesh). */
174.  void
175.  remove_worn_item(obj)
176.  struct obj *obj;
177.  {
178.  	if (donning(obj))
179.  	    cancel_don();
180.  	if (!obj->owornmask)
181.  	    return;
182.  
183.  	if (obj->owornmask & W_ARMOR) {
184.  	    if (obj == uskin) {
185.  		impossible("Removing embedded scales?");
186.  		skinback(TRUE);		/* uarm = uskin; uskin = 0; */
187.  	    }
188.  	    if (obj == uarm) (void) Armor_off();
189.  	    else if (obj == uarmc) (void) Cloak_off();
190.  	    else if (obj == uarmf) (void) Boots_off();
191.  	    else if (obj == uarmg) (void) Gloves_off();
192.  	    else if (obj == uarmh) (void) Helmet_off();
193.  	    else if (obj == uarms) (void) Shield_off();
194.  	    else setworn((struct obj *)0, obj->owornmask & W_ARMOR);
195.  	} else if (obj->owornmask & W_AMUL) {
196.  	    Amulet_off();
197.  	} else if (obj->owornmask & W_RING) {
198.  	    Ring_gone(obj);
199.  	} else if (obj->owornmask & W_TOOL) {
200.  	    Blindf_off(obj);
201.  	} else if (obj->owornmask & (W_BALL|W_CHAIN)) {
202.  	    unpunish();
203.  	} else if (obj->owornmask & (W_WEP|W_SWAPWEP|W_QUIVER)) {
204.  	    if (obj == uwep)
205.  		uwepgone();
206.  	    else if (obj == uswapwep)
207.  		uswapwepgone();
208.  	    else if (obj == uquiver)
209.  		uqwepgone();
210.  	}
211.  
212.  	/* catchall */
213.  	if (obj->owornmask) setnotworn(obj);
214.  }
215.  
216.  /* Returns 1 when something was stolen (or at least, when N should flee now)
217.   * Returns -1 if the monster died in the attempt
218.   * Avoid stealing the object stealoid
219.   */
220.  int
221.  steal(mtmp, objnambuf)
222.  struct monst *mtmp;
223.  char *objnambuf;
224.  {
225.  	struct obj *otmp;
226.  	int tmp, could_petrify, named = 0, armordelay;
227.  	boolean monkey_business; /* true iff an animal is doing the thievery */
228.  
229.  	if (objnambuf) *objnambuf = '\0';
230.  	/* the following is true if successful on first of two attacks. */
231.  	if(!monnear(mtmp, u.ux, u.uy)) return(0);
232.  
233.  	/* food being eaten might already be used up but will not have
234.  	   been removed from inventory yet; we don't want to steal that,
235.  	   so this will cause it to be removed now */
236.  	if (occupation) (void) maybe_finished_meal(FALSE);
237.  
238.  	if (!invent || (inv_cnt() == 1 && uskin)) {
239.  nothing_to_steal:
240.  	    /* Not even a thousand men in armor can strip a naked man. */
241.  	    if(Blind)
242.  	      pline("Somebody tries to rob you, but finds nothing to steal.");
243.  	    else
244.  	      pline("%s tries to rob you, but there is nothing to steal!",
245.  		Monnam(mtmp));
246.  	    return(1);	/* let her flee */
247.  	}
248.  
249.  	monkey_business = is_animal(mtmp->data);
250.  	if (monkey_business) {
251.  	    ;	/* skip ring special cases */
252.  	} else if (Adornment & LEFT_RING) {
253.  	    otmp = uleft;
254.  	    goto gotobj;
255.  	} else if (Adornment & RIGHT_RING) {
256.  	    otmp = uright;
257.  	    goto gotobj;
258.  	}
259.  
260.  	tmp = 0;
261.  	for(otmp = invent; otmp; otmp = otmp->nobj)
262.  	    if ((!uarm || otmp != uarmc) && otmp != uskin
263.  #ifdef INVISIBLE_OBJECTS
264.  				&& (!otmp->oinvis || perceives(mtmp->data))
265.  #endif
266.  				)
267.  		tmp += ((otmp->owornmask &
268.  			(W_ARMOR | W_RING | W_AMUL | W_TOOL)) ? 5 : 1);
269.  	if (!tmp) goto nothing_to_steal;
270.  	tmp = rn2(tmp);
271.  	for(otmp = invent; otmp; otmp = otmp->nobj)
272.  	    if ((!uarm || otmp != uarmc) && otmp != uskin
273.  #ifdef INVISIBLE_OBJECTS
274.  				&& (!otmp->oinvis || perceives(mtmp->data))
275.  #endif
276.  			)
277.  		if((tmp -= ((otmp->owornmask &
278.  			(W_ARMOR | W_RING | W_AMUL | W_TOOL)) ? 5 : 1)) < 0)
279.  			break;
280.  	if(!otmp) {
281.  		impossible("Steal fails!");
282.  		return(0);
283.  	}
284.  	/* can't steal gloves while wielding - so steal the wielded item. */
285.  	if (otmp == uarmg && uwep)
286.  	    otmp = uwep;
287.  	/* can't steal armor while wearing cloak - so steal the cloak. */
288.  	else if(otmp == uarm && uarmc) otmp = uarmc;
289.  #ifdef TOURIST
290.  	else if(otmp == uarmu && uarmc) otmp = uarmc;
291.  	else if(otmp == uarmu && uarm) otmp = uarm;
292.  #endif
293.  gotobj:
294.  	if(otmp->o_id == stealoid) return(0);
295.  
296.  	/* animals can't overcome curse stickiness nor unlock chains */
297.  	if (monkey_business) {
298.  	    boolean ostuck;
299.  	    /* is the player prevented from voluntarily giving up this item?
300.  	       (ignores loadstones; the !can_carry() check will catch those) */
301.  	    if (otmp == uball)
302.  		ostuck = TRUE;	/* effectively worn; curse is implicit */
303.  	    else if (otmp == uquiver || (otmp == uswapwep && !u.twoweap))
304.  		ostuck = FALSE;	/* not really worn; curse doesn't matter */
305.  	    else
306.  		ostuck = (otmp->cursed && otmp->owornmask);
307.  
308.  	    if (ostuck || !can_carry(mtmp, otmp)) {
309.  		static const char *how[] = { "steal","snatch","grab","take" };
310.   cant_take:
311.  		pline("%s tries to %s your %s but gives up.",
312.  		      Monnam(mtmp), how[rn2(SIZE(how))],
313.  		      (otmp->owornmask & W_ARMOR) ? equipname(otmp) :
314.  		       cxname(otmp));
315.  		/* the fewer items you have, the less likely the thief
316.  		   is going to stick around to try again (0) instead of
317.  		   running away (1) */
318.  		return !rn2(inv_cnt() / 5 + 2);
319.  	    }
320.  	}
321.  
322.  	if (otmp->otyp == LEASH && otmp->leashmon) {
323.  	    if (monkey_business && otmp->cursed) goto cant_take;
324.  	    o_unleash(otmp);
325.  	}
326.  
327.  	/* you're going to notice the theft... */
328.  	stop_occupation();
329.  
330.  	if((otmp->owornmask & (W_ARMOR | W_RING | W_AMUL | W_TOOL))){
331.  		switch(otmp->oclass) {
332.  		case TOOL_CLASS:
333.  		case AMULET_CLASS:
334.  		case RING_CLASS:
335.  		case FOOD_CLASS: /* meat ring */
336.  		    remove_worn_item(otmp);
337.  		    break;
338.  		case ARMOR_CLASS:
339.  		    armordelay = objects[otmp->otyp].oc_delay;
340.  		    /* Stop putting on armor which has been stolen. */
341.  		    if (donning(otmp)) {
342.  			remove_worn_item(otmp);
343.  			break;
344.  		    } else if (monkey_business) {
345.  			/* animals usually don't have enough patience
346.  			   to take off items which require extra time */
347.  			if (armordelay >= 1 && rn2(10)) goto cant_take;
348.  			remove_worn_item(otmp);
349.  			break;
350.  		    } else {
351.  			int curssv = otmp->cursed;
352.  			int slowly;
353.  
354.  			otmp->cursed = 0;
355.  			/* can't charm you without first waking you */
356.  			if (multi < 0 && is_fainted()) unmul((char *)0);
357.  			slowly = (armordelay >= 1 || multi < 0);
358.  			if(flags.female)
359.  			    pline("%s charms you.  You gladly %s your %s.",
360.  				  Blind ? "She" : Monnam(mtmp),
361.  				  curssv ? "let her take" :
362.  				  slowly ? "start removing" : "hand over",
363.  				  equipname(otmp));
364.  			else
365.  			    pline("%s seduces you and %s off your %s.",
366.  				  Blind ? "It" : Adjmonnam(mtmp, "beautiful"),
367.  				  curssv ? "helps you to take" :
368.  				  slowly ? "you start taking" : "you take",
369.  				  equipname(otmp));
370.  			named++;
371.  			/* the following is to set multi for later on */
372.  			nomul(-armordelay);
373.  			remove_worn_item(otmp);
374.  			otmp->cursed = curssv;
375.  			if(multi < 0){
376.  				/*
377.  				multi = 0;
378.  				nomovemsg = 0;
379.  				afternmv = 0;
380.  				*/
381.  				stealoid = otmp->o_id;
382.  				stealmid = mtmp->m_id;
383.  				afternmv = stealarm;
384.  				return(0);
385.  			}
386.  		    }
387.  		    break;
388.  		default:
389.  		    impossible("Tried to steal a strange worn thing. [%d]",
390.  			       otmp->oclass);
391.  		}
392.  	}
393.  	else if (otmp->owornmask)
394.  	    remove_worn_item(otmp);
395.  
396.  	/* do this before removing it from inventory */
397.  	if (objnambuf) Strcpy(objnambuf, yname(otmp));
398.  
399.  	freeinv(otmp);
400.  	pline("%s stole %s.", named ? "She" : Monnam(mtmp), doname(otmp));
401.  	could_petrify = (otmp->otyp == CORPSE &&
402.  			 touch_petrifies(&mons[otmp->corpsenm]));
403.  	(void) mpickobj(mtmp,otmp);	/* may free otmp */
404.  	if (could_petrify && !(mtmp->misc_worn_check & W_ARMG)) {
405.  	    minstapetrify(mtmp, TRUE);
406.  	    return -1;
407.  	}
408.  	return((multi < 0) ? 0 : 1);
409.  }
410.  
411.  #endif /* OVLB */
412.  #ifdef OVL1
413.  
414.  /* Returns 1 if otmp is free'd, 0 otherwise. */
415.  int
416.  mpickobj(mtmp,otmp)
417.  register struct monst *mtmp;
418.  register struct obj *otmp;
419.  {
420.      int freed_otmp;
421.  
422.  #ifndef GOLDOBJ
423.      if (otmp->oclass == GOLD_CLASS) {
424.  	mtmp->mgold += otmp->quan;
425.  	obfree(otmp, (struct obj *)0);
426.  	freed_otmp = 1;
427.      } else {
428.  #endif
429.      boolean snuff_otmp = FALSE;
430.      /* don't want hidden light source inside the monster; assumes that
431.         engulfers won't have external inventories; whirly monsters cause
432.         the light to be extinguished rather than letting it shine thru */
433.      if (otmp->lamplit &&  /* hack to avoid function calls for most objs */
434.        	obj_sheds_light(otmp) &&
435.  	attacktype(mtmp->data, AT_ENGL)) {
436.  	/* this is probably a burning object that you dropped or threw */
437.  	if (u.uswallow && mtmp == u.ustuck && !Blind)
438.  	    pline("%s out.", Tobjnam(otmp, "go"));
439.  	snuff_otmp = TRUE;
440.      }
441.      /* Must do carrying effects on object prior to add_to_minv() */
442.      carry_obj_effects(otmp);
443.      /* add_to_minv() might free otmp [if merged with something else],
444.         so we have to call it after doing the object checks */
445.      freed_otmp = add_to_minv(mtmp, otmp);
446.      /* and we had to defer this until object is in mtmp's inventory */
447.      if (snuff_otmp) snuff_light_source(mtmp->mx, mtmp->my);
448.  #ifndef GOLDOBJ
449.      }
450.  #endif
451.      return freed_otmp;
452.  }
453.  
454.  #endif /* OVL1 */
455.  #ifdef OVLB
456.  
457.  void
458.  stealamulet(mtmp)
459.  struct monst *mtmp;
460.  {
461.      struct obj *otmp = (struct obj *)0;
462.      int real=0, fake=0;
463.  
464.      /* select the artifact to steal */
465.      if(u.uhave.amulet) {
466.  	real = AMULET_OF_YENDOR;
467.  	fake = FAKE_AMULET_OF_YENDOR;
468.      } else if(u.uhave.questart) {
469.  	for(otmp = invent; otmp; otmp = otmp->nobj)
470.  	    if(is_quest_artifact(otmp)) break;
471.  	if (!otmp) return;	/* should we panic instead? */
472.      } else if(u.uhave.bell) {
473.  	real = BELL_OF_OPENING;
474.  	fake = BELL;
475.      } else if(u.uhave.book) {
476.  	real = SPE_BOOK_OF_THE_DEAD;
477.      } else if(u.uhave.menorah) {
478.  	real = CANDELABRUM_OF_INVOCATION;
479.      } else return;	/* you have nothing of special interest */
480.  
481.      if (!otmp) {
482.  	/* If we get here, real and fake have been set up. */
483.  	for(otmp = invent; otmp; otmp = otmp->nobj)
484.  	    if(otmp->otyp == real || (otmp->otyp == fake && !mtmp->iswiz))
485.  		break;
486.      }
487.  
488.      if (otmp) { /* we have something to snatch */
489.  	if (otmp->owornmask)
490.  	    remove_worn_item(otmp);
491.  	freeinv(otmp);
492.  	/* mpickobj wont merge otmp because none of the above things
493.  	   to steal are mergable */
494.  	(void) mpickobj(mtmp,otmp);	/* may merge and free otmp */
495.  	pline("%s stole %s!", Monnam(mtmp), doname(otmp));
496.  	if (can_teleport(mtmp->data) && !tele_restrict(mtmp))
497.  	    rloc(mtmp);
498.      }
499.  }
500.  
501.  #endif /* OVLB */
502.  #ifdef OVL0
503.  
504.  /* release the objects the creature is carrying */
505.  void
506.  relobj(mtmp,show,is_pet)
507.  register struct monst *mtmp;
508.  register int show;
509.  boolean is_pet;		/* If true, pet should keep wielded/worn items */
510.  {
511.  	register struct obj *otmp;
512.  	register int omx = mtmp->mx, omy = mtmp->my;
513.  	struct obj *keepobj = 0;
514.  	struct obj *wep = MON_WEP(mtmp);
515.  	boolean item1 = FALSE, item2 = FALSE;
516.  
517.  	if (!is_pet || mindless(mtmp->data) || is_animal(mtmp->data))
518.  		item1 = item2 = TRUE;
519.  	if (!tunnels(mtmp->data) || !needspick(mtmp->data))
520.  		item1 = TRUE;
521.  	while ((otmp = mtmp->minvent) != 0) {
522.  		obj_extract_self(otmp);
523.  		/* special case: pick-axe and unicorn horn are non-worn */
524.  		/* items that we also want pets to keep 1 of */
525.  		/* (It is a coincidence that these can also be wielded. */
526.  		if (otmp->owornmask || otmp == wep ||
527.  		    ((!item1 && otmp->otyp == PICK_AXE) ||
528.  		     (!item2 && otmp->otyp == UNICORN_HORN && !otmp->cursed))) {
529.  			if (is_pet) { /* dont drop worn/wielded item */
530.  				if (otmp->otyp == PICK_AXE)
531.  					item1 = TRUE;
532.  				if (otmp->otyp == UNICORN_HORN && !otmp->cursed)
533.  					item2 = TRUE;
534.  				otmp->nobj = keepobj;
535.  				keepobj = otmp;
536.  				continue;
537.  			}
538.  			mtmp->misc_worn_check &= ~(otmp->owornmask);
539.  #ifdef STEED
540.  			/* don't charge for an owned saddle on dead pet */
541.  			if (mtmp->mtame && mtmp->mhp == 0 &&
542.  			    (otmp->owornmask & W_SADDLE) && !otmp->unpaid &&
543.  			    costly_spot(mtmp->mx, mtmp->my))
544.  				otmp->no_charge = 1;
545.  #endif
546.  			otmp->owornmask = 0L;
547.  		}
548.  		if (is_pet && cansee(omx, omy) && flags.verbose)
549.  			pline("%s drops %s.", Monnam(mtmp),
550.  					distant_name(otmp, doname));
551.  		if (flooreffects(otmp, omx, omy, "fall")) continue;
552.  		place_object(otmp, omx, omy);
553.  		stackobj(otmp);
554.  	}
555.  	/* put kept objects back */
556.  	while ((otmp = keepobj) != (struct obj *)0) {
557.  	    keepobj = otmp->nobj;
558.  	    (void) add_to_minv(mtmp, otmp);
559.  	}
560.  #ifndef GOLDOBJ
561.  	if (mtmp->mgold) {
562.  		register long g = mtmp->mgold;
563.  		(void) mkgold(g, omx, omy);
564.  		if (is_pet && cansee(omx, omy) && flags.verbose)
565.  			pline("%s drops %ld gold piece%s.", Monnam(mtmp),
566.  				g, plur(g));
567.  		mtmp->mgold = 0L;
568.  	}
569.  #endif
570.  	
571.  	if (show & cansee(omx, omy))
572.  		newsym(omx, omy);
573.  }
574.  
575.  #endif /* OVL0 */
576.  
577.  /*steal.c*/