Source:NetHack 1.3d/mon.c

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Below is the full text to mon.c from the source code of NetHack 1.3d. To link to a particular line, write [[NetHack 1.3d/mon.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: @(#)mon.c	1.3	87/07/14
2.    /* Copyright (c) Stichting Mathematisch Centrum, Amsterdam, 1985. */
3.    /* mon.c - version 1.0.3 */
4.    
5.    #include "hack.h"
6.    #include "mfndpos.h"
7.    extern struct obj *mkobj_at();
8.    extern char *hcolor();
9.    #ifdef KAA
10.   extern boolean	stoned;
11.   extern char mlarge[];
12.   #endif
13.   
14.   int warnlevel;		/* used by movemon and dochugw */
15.   long lastwarntime;
16.   int lastwarnlev;
17.   char	*warnings[] = {	"white", "pink", "red", "ruby", "purple", "black"  };
18.   
19.   movemon()
20.   {
21.   	register struct monst *mtmp;
22.   	register int fr;
23.   
24.   	warnlevel = 0;
25.   
26.   	while(1) {
27.   		/* find a monster that we haven't treated yet */
28.   		/* note that mtmp or mtmp->nmon might get killed
29.   		   while mtmp moves, so we cannot just walk down the
30.   		   chain (even new monsters might get created!) */
31.   		for(mtmp = fmon; mtmp; mtmp = mtmp->nmon)
32.   			if(mtmp->mlstmv < moves) goto next_mon;
33.   		/* treated all monsters */
34.   		break;
35.   
36.   	next_mon:
37.   		mtmp->mlstmv = moves;
38.   
39.   		/* most monsters drown in pools */
40.   		{ boolean inpool, iseel;
41.   
42.   		  inpool = (levl[mtmp->mx][mtmp->my].typ == POOL);
43.   		  iseel = (mtmp->data->mlet == ';');
44.   		  if(inpool && !iseel) {
45.   			if(cansee(mtmp->mx,mtmp->my))
46.   			    pline("%s drowns.", Monnam(mtmp));
47.   			mondead(mtmp);
48.   			continue;
49.   		  }
50.   		/* but eels have a difficult time outside */
51.   		  if(iseel && !inpool) {
52.   			if(mtmp->mhp > 1) mtmp->mhp--;
53.   			mtmp->mflee = 1;
54.   			mtmp->mfleetim += 2;
55.   		  }
56.   		}
57.   		if(mtmp->mblinded && !--mtmp->mblinded)
58.   			mtmp->mcansee = 1;
59.   		if(mtmp->mfleetim && !--mtmp->mfleetim)
60.   			mtmp->mflee = 0;
61.   		/* unwatched mimics and piercers may hide again  [MRS] */
62.   		if(restrap(mtmp))	continue;
63.   		if(mtmp->mimic) continue;
64.   		if(mtmp->mspeed != MSLOW || !(moves%2)){
65.   			/* continue if the monster died fighting */
66.   			fr = -1;
67.   			if(Conflict && cansee(mtmp->mx,mtmp->my)
68.   				&& (fr = fightm(mtmp)) == 2)
69.   				continue;
70.   			if(fr<0 && dochugw(mtmp))
71.   				continue;
72.   		}
73.   		if(mtmp->mspeed == MFAST && dochugw(mtmp))
74.   			continue;
75.   	}
76.   
77.   	warnlevel -= u.ulevel;
78.   	if(warnlevel >= SIZE(warnings))
79.   		warnlevel = SIZE(warnings)-1;
80.   	if(warnlevel >= 0)
81.   	if(warnlevel > lastwarnlev || moves > lastwarntime + 5){
82.   	    register char *rr;
83.   	    switch(Warning & (LEFT_RING | RIGHT_RING)){
84.   	    case LEFT_RING:
85.   		rr = "Your left ring glows";
86.   		break;
87.   	    case RIGHT_RING:
88.   		rr = "Your right ring glows";
89.   		break;
90.   	    case LEFT_RING | RIGHT_RING:
91.   		rr = "Both your rings glow";
92.   		break;
93.   	    default:
94.   		rr = "Your fingertips glow";
95.   		break;
96.   	    }
97.   	    pline("%s %s!", rr, Hallucination ? hcolor() : warnings[warnlevel]);
98.   	    lastwarntime = moves;
99.   	    lastwarnlev = warnlevel;
100.  	}
101.  
102.  	dmonsfree();	/* remove all dead monsters */
103.  }
104.  
105.  justswld(mtmp,name)
106.  register struct monst *mtmp;
107.  char *name;
108.  {
109.  
110.  	mtmp->mx = u.ux;
111.  	mtmp->my = u.uy;
112.  	u.ustuck = mtmp;
113.  	pmon(mtmp);
114.  	kludge("%s swallows you!",name);
115.  	more();
116.  	seeoff(1);
117.  	u.uswallow = 1;
118.  	u.uswldtim = 0;
119.  	swallowed();
120.  }
121.  
122.  youswld(mtmp,dam,die,name)
123.  register struct monst *mtmp;
124.  register dam,die;
125.  char *name;
126.  {
127.  	if(mtmp != u.ustuck) return;
128.  	kludge("%s digests you!",name);
129.  	u.uhp -= dam;
130.  	if(u.uswldtim++ >= die){	/* a3 */
131.  		pline("It totally digests you!");
132.  		u.uhp = -1;
133.  	}
134.  	if(u.uhp < 1) done_in_by(mtmp);
135.  	/* flags.botlx = 1;		/* should we show status line ? */
136.  }
137.  
138.  #ifdef ROCKMOLE
139.  meatgold(mtmp) register struct monst *mtmp; {
140.  register struct gold *gold;
141.  register int pile;
142.  register struct obj *otmp;
143.         /* Eats gold if it is there */
144.        while(gold = g_at(mtmp->mx, mtmp->my)){
145.  	      freegold(gold);
146.  	       /* Left behind a pile? */
147.  	       pile = rnd(25);
148.  	       if(pile < 3)
149.  		 mksobj_at(ROCK, mtmp->mx, mtmp->my);
150.  	      newsym(mtmp->mx, mtmp->my);
151.  	}
152.         /* Eats armor if it is there */
153.         otmp = o_at(mtmp->mx,mtmp->my);
154.         if((otmp) && (otmp->otyp >= PLATE_MAIL) && (otmp->otyp <= RING_MAIL)){
155.  	      freeobj(otmp);
156.  	       /* Left behind a pile? */
157.  	       pile = rnd(25);
158.  	       if(pile < 3)
159.  		  mksobj_at(ROCK, mtmp->mx, mtmp->my);
160.  	      newsym(mtmp->mx, mtmp->my);
161.  	}
162.  }
163.  #endif /* ROCKMOLE /**/
164.  
165.  mpickgold(mtmp) register struct monst *mtmp; {
166.  register struct gold *gold;
167.  register struct obj *otmp;
168.  	while(gold = g_at(mtmp->mx, mtmp->my)){
169.  		mtmp->mgold += gold->amount;
170.  		freegold(gold);
171.  		if(levl[mtmp->mx][mtmp->my].scrsym == '$')
172.  			newsym(mtmp->mx, mtmp->my);
173.  	}
174.  }
175.  
176.  /* Now includes giants which pick up enormous rocks.  KAA */
177.  mpickgems(mtmp) register struct monst *mtmp; {
178.  register struct obj *otmp;
179.  	for(otmp = fobj; otmp; otmp = otmp->nobj)
180.  	  if(otmp->olet ==
181.  #ifdef KAA
182.  			   (mtmp->data->mlet=='9' ? ROCK_SYM : GEM_SYM))
183.  #else
184.  			   GEM_SYM)
185.  #endif
186.  	    if(otmp->ox == mtmp->mx && otmp->oy == mtmp->my)
187.  	      if(mtmp->data->mlet != 'u' || objects[otmp->otyp].g_val != 0){
188.  		freeobj(otmp);
189.  		mpickobj(mtmp, otmp);
190.  #ifndef KAA
191.  		if(levl[mtmp->mx][mtmp->my].scrsym == GEM_SYM)
192.  #endif
193.  			newsym(mtmp->mx, mtmp->my);	/* %% */
194.  		return;	/* pick only one object */
195.  	      }
196.  }
197.  
198.  /* return number of acceptable neighbour positions */
199.  mfndpos(mon,poss,info,flag)
200.  register struct monst *mon;
201.  coord poss[9];
202.  long info[9], flag;
203.  {
204.  	register int x,y,nx,ny,cnt = 0,ntyp;
205.  	register struct monst *mtmp;
206.  	int nowtyp;
207.  	boolean pool;
208.  
209.  	x = mon->mx;
210.  	y = mon->my;
211.  	nowtyp = levl[x][y].typ;
212.  
213.  	pool = (mon->data->mlet == ';');
214.  nexttry:	/* eels prefer the water, but if there is no water nearby,
215.  		   they will crawl over land */
216.  	if(mon->mconf) {
217.  		flag |= ALLOW_ALL;
218.  		flag &= ~NOTONL;
219.  	}
220.  	for(nx = x-1; nx <= x+1; nx++) for(ny = y-1; ny <= y+1; ny++)
221.  	if(nx != x || ny != y) if(isok(nx,ny))
222.  #ifdef ROCKMOLE
223.  	if(!IS_ROCK(ntyp = levl[nx][ny].typ) || (flag & ALLOW_WALL))
224.  #else
225.  	if(!IS_ROCK(ntyp = levl[nx][ny].typ))
226.  #endif
227.  	if(!(nx != x && ny != y && (nowtyp == DOOR || ntyp == DOOR)))
228.  	if((ntyp == POOL) == pool) {
229.  		info[cnt] = 0;
230.  		if(nx == u.ux && ny == u.uy){
231.  			if(!(flag & ALLOW_U)) continue;
232.  			info[cnt] = ALLOW_U;
233.  		} else if(mtmp = m_at(nx,ny)){
234.  			if(!(flag & ALLOW_M)) continue;
235.  			info[cnt] = ALLOW_M;
236.  			if(mtmp->mtame){
237.  				if(!(flag & ALLOW_TM)) continue;
238.  				info[cnt] |= ALLOW_TM;
239.  			}
240.  		}
241.  		if(sobj_at(CLOVE_OF_GARLIC, nx, ny)) {
242.  			if(flag & NOGARLIC) continue;
243.  			info[cnt] |= NOGARLIC;
244.  		}
245.  		if(sobj_at(SCR_SCARE_MONSTER, nx, ny) ||
246.  		   (!mon->mpeaceful && sengr_at("Elbereth", nx, ny))) {
247.  			if(!(flag & ALLOW_SSM)) continue;
248.  			info[cnt] |= ALLOW_SSM;
249.  		}
250.  		if(sobj_at(ENORMOUS_ROCK, nx, ny)) {
251.  			if(!(flag & ALLOW_ROCK)) continue;
252.  			info[cnt] |= ALLOW_ROCK;
253.  		}
254.  		if(!Invis && online(nx,ny)){
255.  			if(flag & NOTONL) continue;
256.  			info[cnt] |= NOTONL;
257.  		}
258.  		/* we cannot avoid traps of an unknown kind */
259.  		{ register struct trap *ttmp = t_at(nx, ny);
260.  		  register int tt;
261.  			if(ttmp) {
262.  				tt = 1 << ttmp->ttyp;
263.  				/* below if added by GAN 02/06/87 to avoid
264.  				 * traps out of range
265.  				 */
266.  				if(!(tt & ALLOW_TRAPS))  {
267.  					impossible("A monster looked at a very strange trap");
268.  					continue;
269.  				}
270.  				if(mon->mtrapseen & tt){
271.  					if(!(flag & tt)) continue;
272.  					info[cnt] |= tt;
273.  				}
274.  			}
275.  		}
276.  		poss[cnt].x = nx;
277.  		poss[cnt].y = ny;
278.  		cnt++;
279.  	}
280.  	if(!cnt && pool && nowtyp != POOL) {
281.  		pool = FALSE;
282.  		goto nexttry;
283.  	}
284.  	return(cnt);
285.  }
286.  
287.  dist(x,y) int x,y; {
288.  	return((x-u.ux)*(x-u.ux) + (y-u.uy)*(y-u.uy));
289.  }
290.  
291.  poisoned(string, pname)
292.  register char *string, *pname;
293.  {
294.  	register i, plural;
295.  
296.  	plural = (string[strlen(string) - 1] == 's')? 1 : 0;
297.  	if(Blind) {
298.  		if (plural)	pline("They were poisoned.");
299.  		else		pline("It was poisoned.");
300.  	} else	{
301.  		if (plural)	pline("The %s were poisoned!", string);
302.  		else		pline("The %s was poisoned!", string);
303.  	}
304.  
305.  	if(Poison_resistance) {
306.  		pline("The poison doesn't seem to affect you.");
307.  		return;
308.  	}
309.  	i = rn2(10);
310.  	if(i == 0) {
311.  		u.uhp = -1;
312.  		pline("I am afraid the poison was deadly ...");
313.  	} else if(i <= 5) {
314.  		losestr(rn1(3,3));
315.  	} else {
316.  		losehp(rn1(10,6), pname);
317.  	}
318.  	if(u.uhp < 1) {
319.  		killer = pname;
320.  		done("died");
321.  	}
322.  }
323.  
324.  mondead(mtmp)
325.  register struct monst *mtmp;
326.  {
327.  	relobj(mtmp,1);
328.  	unpmon(mtmp);
329.  	relmon(mtmp);
330.  	unstuck(mtmp);
331.  #ifdef KOPS
332.         if(mtmp->data->mlet == 'K') {
333.  	   /* When a Kop dies, he probably comes back. */
334.  	   register int fate = rnd(3);
335.  	   if(fate == 1) {
336.  	     /* returns near the stairs */
337.  	     mkmon_at('K',xdnstair,ydnstair);
338.  	   } else if(fate == 2) {
339.  	     /* randomly */
340.  	     mkmon_at('K',0,0);
341.  	   }
342.         }
343.  #endif
344.  	if(mtmp->isshk) shkdead(mtmp);
345.  	if(mtmp->isgd) gddead();
346.  #ifndef NOWORM
347.  	if(mtmp->wormno) wormdead(mtmp);
348.  #endif
349.  #ifdef HARD
350.  	if(mtmp->data->mlet == '1') wizdead(mtmp);
351.  #endif
352.  	monfree(mtmp);
353.  }
354.  
355.  /* called when monster is moved to larger structure */
356.  replmon(mtmp,mtmp2)
357.  register struct monst *mtmp, *mtmp2;
358.  {
359.  	relmon(mtmp);
360.  	monfree(mtmp);
361.  	mtmp2->nmon = fmon;
362.  	fmon = mtmp2;
363.  	if(u.ustuck == mtmp) u.ustuck = mtmp2;
364.  	if(mtmp2->isshk) replshk(mtmp,mtmp2);
365.  	if(mtmp2->isgd) replgd(mtmp,mtmp2);
366.  }
367.  
368.  relmon(mon)
369.  register struct monst *mon;
370.  {
371.  	register struct monst *mtmp;
372.  
373.  	if (fmon == 0)  panic ("relmon: no fmon available.");
374.  
375.  	if(mon == fmon) fmon = fmon->nmon;
376.  	else {
377.  		for(mtmp = fmon; mtmp->nmon != mon; mtmp = mtmp->nmon) ;
378.  		mtmp->nmon = mon->nmon;
379.  	}
380.  }
381.  
382.  /* we do not free monsters immediately, in order to have their name
383.     available shortly after their demise */
384.  struct monst *fdmon;	/* chain of dead monsters, need not to be saved */
385.  
386.  monfree(mtmp) register struct monst *mtmp; {
387.  	mtmp->nmon = fdmon;
388.  	fdmon = mtmp;
389.  }
390.  
391.  dmonsfree(){
392.  register struct monst *mtmp;
393.  	while(mtmp = fdmon){
394.  		fdmon = mtmp->nmon;
395.  		free((char *) mtmp);
396.  	}
397.  }
398.  
399.  unstuck(mtmp)
400.  register struct monst *mtmp;
401.  {
402.  	if(u.ustuck == mtmp) {
403.  		if(u.uswallow){
404.  			u.ux = mtmp->mx;
405.  			u.uy = mtmp->my;
406.  			u.uswallow = 0;
407.  			setsee();
408.  			docrt();
409.  		}
410.  		u.ustuck = 0;
411.  	}
412.  }
413.  
414.  killed(mtmp)
415.  register struct monst *mtmp;
416.  {
417.  	xkilled(mtmp, 1);
418.  }
419.  
420.  xkilled(mtmp, dest)
421.  register struct monst *mtmp;
422.  int	dest;
423.  /* Dest=1, normal; dest=0, don't print message; dest=2, don't drop corpse
424.     either; dest=3, message but no corpse */
425.  {
426.  #ifdef lint
427.  #define	NEW_SCORING
428.  #endif
429.  	register int tmp,tmp2,nk,x,y;
430.  	register struct permonst *mdat = mtmp->data;
431.  	extern long newuexp();
432.  
433.  	if(mtmp->cham) mdat = PM_CHAMELEON;
434.  	if (dest & 1) {
435.  	    if(Blind) pline("You destroy it!");
436.  	    else {
437.  		pline("You destroy %s!",
438.  			mtmp->mtame ? amonnam(mtmp, "poor") : monnam(mtmp));
439.  	    }
440.  	}
441.  	if(u.umconf) {
442.  		if(!Blind)
443.  		{
444.  			pline("Your hands stop glowing %s.",
445.  			Hallucination ? hcolor() : "blue");
446.  		}
447.  		u.umconf = 0;
448.  	}
449.  
450.  	/* count killed monsters */
451.  #define	MAXMONNO	100
452.  	nk = 1;		      /* in case we cannot find it in mons */
453.  	tmp = mdat - mons;    /* index in mons array (if not 'd', '@', ...) */
454.  	if(tmp >= 0 && tmp < CMNUM+2) {
455.  	    extern char fut_geno[];
456.  	    u.nr_killed[tmp]++;
457.  	    if((nk = u.nr_killed[tmp]) > MAXMONNO &&
458.  		!index(fut_geno, mdat->mlet))
459.  		    charcat(fut_geno,  mdat->mlet);
460.  	}
461.  
462.  	/* punish bad behaviour */
463.  	if(mdat->mlet == '@') {
464.  		HTelepat = 0;
465.  		u.uluck -= 2;
466.  	}
467.  	if(mtmp->mpeaceful || mtmp->mtame) u.uluck--;
468.  	if(mdat->mlet == 'u') u.uluck -= 5;
469.  	if((int)u.uluck < LUCKMIN) u.uluck = LUCKMIN;
470.  
471.  	/* give experience points */
472.  	tmp = 1 + mdat->mlevel * mdat->mlevel;
473.  	if(mdat->ac < 3) tmp += 2*(7 - mdat->ac);
474.  #ifdef KAA
475.  	if(index("AcsSDXaeRTVWU&In:P9", mdat->mlet))
476.  #else
477.  	if(index("AcsSDXaeRTVWU&In:P", mdat->mlet))
478.  #endif
479.  		tmp += 2*mdat->mlevel;
480.  	if(index("DeV&P",mdat->mlet)) tmp += (7*mdat->mlevel);
481.  	if(mdat->mlevel > 6) tmp += 50;
482.  	if(mdat->mlet == ';') tmp += 1000;
483.  
484.  #ifdef NEW_SCORING
485.  	/* ------- recent addition: make nr of points decrease
486.  		   when this is not the first of this kind */
487.  	{ int ul = u.ulevel;
488.  	  int ml = mdat->mlevel;
489.  
490.  	if(ul < 14)    /* points are given based on present and future level */
491.  	    for(tmp2 = 0; !tmp2 || ul + tmp2 <= ml; tmp2++)
492.  		if(u.uexp + 1 + (tmp + ((tmp2 <= 0) ? 0 : 4<<(tmp2-1)))/nk
493.  		    >= 10*pow((unsigned)(ul-1)))
494.  			if(++ul == 14) break;
495.  
496.  	tmp2 = ml - ul -1;
497.  	tmp = (tmp + ((tmp2 < 0) ? 0 : 4<<tmp2))/nk;
498.  	if(!tmp) tmp = 1;
499.  	}
500.  	/* note: ul is not necessarily the future value of u.ulevel */
501.  	/* ------- end of recent valuation change ------- */
502.  #endif /* NEW_SCORING /**/
503.  
504.  	more_experienced(tmp,0);
505.  	flags.botl = 1;
506.  	while(u.ulevel < 14 && u.uexp >= newuexp()){
507.  		pline("Welcome to experience level %u.", ++u.ulevel);
508.  		tmp = rnd(10);
509.  		if(tmp < 3) tmp = rnd(10);
510.  		u.uhpmax += tmp;
511.  		u.uhp += tmp;
512.  #ifdef SPELLS
513.  		tmp = rnd(u.ulevel/2+1) + 1;	/* M. Stephenson */
514.  		u.uenmax += tmp;
515.  		u.uen += tmp;
516.  #endif
517.  		flags.botl = 1;
518.  	}
519.  
520.  	/* dispose of monster and make cadaver */
521.  	x = mtmp->mx;	y = mtmp->my;
522.  	mondead(mtmp);
523.  	tmp = mdat->mlet;
524.  	if(tmp == 'm') { /* he killed a minotaur, give him a wand of digging */
525.  			/* note: the dead minotaur will be on top of it! */
526.  		mksobj_at(WAN_DIGGING, x, y);
527.  		/* if(cansee(x,y)) atl(x,y,fobj->olet); */
528.  		stackobj(fobj);
529.  	} else
530.  #ifndef NOWORM
531.  	if(tmp == 'w') {
532.  		mksobj_at(WORM_TOOTH, x, y);
533.  		stackobj(fobj);
534.  	} else
535.  #endif
536.  #ifdef KAA
537.  	if(tmp == '&') (void) mkobj_at(0, x, y);
538.  	else
539.  	if(stoned == FALSE && (!letter(tmp) || (!index("9&1", tmp) && !rn2(3)))) tmp = 0;
540.  	    if(dest & 2) {
541.  		newsym(x,y);
542.  		return;
543.  	    }
544.  #else
545.  	if(!letter(tmp) || (!index("mw", tmp) && !rn2(3))) tmp = 0;
546.  #endif
547.  
548.  	if(ACCESSIBLE(levl[x][y].typ))	/* might be mimic in wall or dead eel*/
549.  	    if(x != u.ux || y != u.uy) {  /* might be here after swallowed */
550.  #ifdef KAA
551.  		if(stoned) {
552.  			register char typetmp;
553.  			if(index(mlarge, tmp))	typetmp = ENORMOUS_ROCK;
554.  			else			typetmp = ROCK;
555.  			mksobj_at(typetmp, x, y);
556.  			if(cansee(x,y))
557.  				atl(x,y,Hallucination ? rndobjsym() :
558.  				objects[typetmp].oc_olet);
559.  		} else if(index("NTVm&w",mdat->mlet) || rn2(5)) {
560.  #else
561.  		if(index("NTVm&w",mdat->mlet) || rn2(5)) {
562.  #endif
563.  			register struct obj *obj2 = mkobj_at(tmp,x,y);
564.  			if(cansee(x,y))
565.  			    atl(x, y, Hallucination ? rndobjsym() : obj2->olet);
566.  			stackobj(obj2);
567.  		}
568.  	    }
569.  }
570.  
571.  kludge(str,arg)
572.  register char *str,*arg;
573.  {
574.  	if(Blind) {
575.  		if(*str == '%') pline(str,"It");
576.  		else pline(str,"it");
577.  	} else pline(str,arg);
578.  }
579.  
580.  rescham()	/* force all chameleons to become normal */
581.  {
582.  	register struct monst *mtmp;
583.  
584.  	for(mtmp = fmon; mtmp; mtmp = mtmp->nmon)
585.  		if(mtmp->cham) {
586.  			mtmp->cham = 0;
587.  			(void) newcham(mtmp, PM_CHAMELEON);
588.  		}
589.  }
590.  
591.  #ifdef DGKMOD
592.  /* Let the chameleons change again -dgk */
593.  restartcham()
594.  {
595.  	register struct monst *mtmp;
596.  
597.  	for (mtmp = fmon; mtmp; mtmp = mtmp->nmon)
598.  		if (mtmp->data->mlet == ':') 
599.  			mtmp->cham = 1;
600.  }
601.  #endif
602.  
603.  newcham(mtmp,mdat)	/* make a chameleon look like a new monster */
604.  			/* returns 1 if the monster actually changed */
605.  register struct monst *mtmp;
606.  register struct permonst *mdat;
607.  {
608.  	register mhp, hpn, hpd;
609.  
610.  	if(mdat == mtmp->data) return(0);	/* still the same monster */
611.  #ifndef NOWORM
612.  	if(mtmp->wormno) wormdead(mtmp);	/* throw tail away */
613.  #endif
614.  	hpn = mtmp->mhp;
615.  	hpd = (mtmp->data->mlevel)*8;	if(!hpd) hpd = 4;
616.  	mhp = (mdat->mlevel)*8;		if(!mhp) mhp = 4;
617.  
618.  	/* new hp: same fraction of max as before */
619.  	mtmp->mhp = (hpn*mhp)/hpd;
620.  	if (mhp > hpd && mtmp->mhp < hpn) mtmp->mhp = 127;
621.  /* Not totally foolproof.  A 2HD monster with 80 HP that changes into a 6HD
622.     monster that really should have 240 and actually should have 127, the
623.     maximum possible, will wind up having 113.  */
624.  	if (!mtmp->mhp) mtmp->mhp = 1;
625.  /* Unlikely but not impossible; a 1HD creature with 1HP that changes into a
626.     0HD creature will require this statement */
627.  	mtmp->data = mdat;
628.  /* and the same for maximum hit points */
629.  	hpn = mtmp->mhpmax;
630.  	mtmp->mhpmax = (hpn*mhp)/hpd;
631.  	if (mhp > hpd && mtmp->mhpmax < hpn) mtmp->mhp = 127;
632.  	if (!mtmp->mhp) mtmp->mhp = 1;
633.  
634.  	mtmp->minvis = (mdat->mlet == 'I') ? 1 : 0;
635.  	/* only snakes and scorpions can hide under things -dgk */
636.  	/* also generated by GAN */
637.  	mtmp->mhide = (mdat->mlet == 'S' || mdat->mlet == 's') ? 1 : 0;
638.  	if (!mtmp->mhide) mtmp->mundetected = 0;
639.  #ifndef NOWORM
640.  	if(mdat->mlet == 'w' && getwn(mtmp)) initworm(mtmp);
641.  			/* perhaps we should clear mtmp->mtame here? */
642.  #endif
643.  	unpmon(mtmp);	/* necessary for 'I' and to force pmon */
644.  	pmon(mtmp);
645.  	return(1);
646.  }
647.  
648.  mnexto(mtmp)	/* Make monster mtmp next to you (if possible) */
649.  struct monst *mtmp;
650.  {
651.  	extern coord enexto();
652.  	coord mm;
653.  	mm = enexto(u.ux, u.uy);
654.  	mtmp->mx = mm.x;
655.  	mtmp->my = mm.y;
656.  	pmon(mtmp);
657.  }
658.  
659.  ishuman(mtmp) register struct monst *mtmp; {
660.  	return(mtmp->data->mlet == '@');
661.  }
662.  
663.  setmangry(mtmp) register struct monst *mtmp; {
664.  	if(!mtmp->mpeaceful) return;
665.  	if(mtmp->mtame) return;
666.  	mtmp->mpeaceful = 0;
667.  	if(ishuman(mtmp)) pline("%s gets angry!", Monnam(mtmp));
668.  }
669.  
670.  /* not one hundred procent correct: now a snake may hide under an
671.     invisible object */
672.  canseemon(mtmp)
673.  register struct monst *mtmp;
674.  {
675.  	return((!mtmp->minvis || See_invisible)
676.  		&& (!mtmp->mhide || !o_at(mtmp->mx,mtmp->my))
677.  		&& cansee(mtmp->mx, mtmp->my));
678.  }
679.  
680.  disturb(mtmp)		/* awaken monsters while in the same room.
681.  			 * return a 1 if they have been woken.
682.  			 */
683.  register struct monst *mtmp;
684.  {
685.  	/* wake up, or get out of here. */
686.  	/* ettins are hard to surprise */
687.  	/* Nymphs and Leprechauns do not easily wake up */
688.  	if(cansee(mtmp->mx,mtmp->my) &&
689.  		(!Stealth || (mtmp->data->mlet == 'e' && rn2(10))) &&
690.  		(!index("NL",mtmp->data->mlet) || !rn2(50)) &&
691.  		(Aggravate_monster || index("d1", mtmp->data->mlet)
692.  			|| (!rn2(7) && !mtmp->mimic))) {
693.  		mtmp->msleep = 0;
694.  		return(1);
695.  	}
696.  	if(Hallucination) pmon(mtmp);
697.  	return(0);
698.  }
699.  
700.  #ifdef HARD
701.  restrap(mtmp)		/* unwatched mimics and piercers may hide again,
702.  			 * if so, a 1 is returned.
703.  			 */
704.  register struct monst *mtmp;
705.  {
706.  	if(mtmp->data->mlet == 'M' && !mtmp->mimic && !mtmp->cham
707.  	   && !mtmp->mcan && !cansee(mtmp->mx, mtmp->my)
708.  	   && !rn2(3)) {
709.  		mtmp->mimic = 1;
710.  		mtmp->mappearance = (levl[mtmp->mx][mtmp->my].typ == DOOR) ? DOOR_SYM : '$';
711.  		return(1);
712.  	   }
713.  
714.  	if(mtmp->data->mlet == 'p' && !mtmp->cham
715.  	   && !mtmp->mcan && !cansee(mtmp->mx, mtmp->my)
716.  	   && !rn2(3))  {
717.  
718.  		if(levl[mtmp->mx][mtmp->my].typ == ROOM)  {
719.  
720.  			maketrap(mtmp->mx, mtmp->my, PIERC);
721.  			mondead(mtmp);
722.  			return(1);
723.  		}
724.  	   }
725.  	return(0);
726.  }
727.  #endif