Source:NetHack 1.4f/shk.c

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Below is the full text to shk.c from the source code of NetHack 1.4f. To link to a particular line, write [[NetHack 1.4f/shk.c#line123]], for example.

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

Screenshots and source code from Hack are used under the CWI license.

1.    /*	SCCS Id: @(#)shk.c	1.4	87/08/08
2.    /* Copyright (c) Stichting Mathematisch Centrum, Amsterdam, 1985. */
3.    /* shk.c - version 1.0.3 */
4.    
5.    #include "hack.h"
6.    #ifdef QUEST
7.    int shlevel = 0;
8.    struct monst *shopkeeper = 0;
9.    struct obj *billobjs = 0;
10.   obfree(obj,merge) register struct obj *obj, *merge; {
11.   	free((char *) obj);
12.   }
13.   inshop(){ return(0); }
14.   addtobill(){}
15.   subfrombill(){}
16.   splitbill(){}
17.   dopay(){ return(0); }
18.   paybill(){}
19.   doinvbill(){ return(0); }
20.   shkdead(){}
21.   shkcatch(){ return(0); }
22.   shk_move(){ return(0); }
23.   replshk(mtmp,mtmp2) struct monst *mtmp, *mtmp2; {}
24.   char *shkname(){ return(""); }
25.   
26.   #else
27.   #include	"mfndpos.h"
28.   #include	"mkroom.h"
29.   #include	"eshk.h"
30.   
31.   #define	ESHK(mon)	((struct eshk *)(&(mon->mextra[0])))
32.   #define	NOTANGRY(mon)	mon->mpeaceful
33.   #define	ANGRY(mon)	!NOTANGRY(mon)
34.   
35.   extern char plname[], *xname();
36.   extern struct obj *o_on(), *bp_to_obj();
37.   
38.   /* Descriptor of current shopkeeper. Note that the bill need not be
39.      per-shopkeeper, since it is valid only when in a shop. */
40.   static struct monst *shopkeeper = 0;
41.   static struct bill_x *bill;
42.   static int shlevel = 0;	/* level of this shopkeeper */
43.          struct obj *billobjs;	/* objects on bill with bp->useup */
44.   				/* only accessed here and by save & restore */
45.   static long int total;		/* filled by addupbill() */
46.   static long int followmsg;	/* last time of follow message */
47.   static setpaid(), findshk(), dopayobj(), getprice(), realhunger();
48.   
49.   /*
50.   	invariants: obj->unpaid iff onbill(obj) [unless bp->useup]
51.   		obj->quan <= bp->bquan
52.    */
53.   
54.   
55.   char shtypes[] = {	/* 9 shoptypes: 8 specialized, 1 mixed */
56.   	RING_SYM, WAND_SYM,
57.   #ifdef SPELLS
58.   	SPBOOK_SYM,
59.   #endif
60.   	WEAPON_SYM, FOOD_SYM, SCROLL_SYM, POTION_SYM, ARMOR_SYM, 0
61.   };
62.   char *shopnam[] = {
63.   	"engagement ring", "walking cane",
64.   #ifdef SPELLS
65.   	"rare book",
66.   #endif
67.   	"antique weapon", "delicatessen", "second hand book",
68.   	"liquor", "used armor", "assorted antiques"
69.   };
70.   
71.   char *
72.   shkname(mtmp)				/* called in do_name.c */
73.   register struct monst *mtmp;
74.   {
75.   	return(ESHK(mtmp)->shknam);
76.   }
77.   
78.   shkdead(mtmp)				/* called in mon.c */
79.   register struct monst *mtmp;
80.   {
81.   	register struct eshk *eshk = ESHK(mtmp);
82.   
83.   	if(eshk->shoplevel == dlevel)
84.   		rooms[eshk->shoproom].rtype = 0;
85.   	if(mtmp == shopkeeper) {
86.   		setpaid();
87.   		shopkeeper = 0;
88.   		bill = (struct bill_x *) -1000;	/* dump core when referenced */
89.   	}
90.   }
91.   
92.   replshk(mtmp,mtmp2)
93.   register struct monst *mtmp, *mtmp2;
94.   {
95.   	if(mtmp == shopkeeper) {
96.   		shopkeeper = mtmp2;
97.   		bill = &(ESHK(shopkeeper)->bill[0]);
98.   	}
99.   }
100.  
101.  static
102.  setpaid(){	/* caller has checked that shopkeeper exists */
103.  		/* either we paid or left the shop or he just died */
104.  register struct obj *obj;
105.  register struct monst *mtmp;
106.  	for(obj = invent; obj; obj = obj->nobj)
107.  		obj->unpaid = 0;
108.  	for(obj = fobj; obj; obj = obj->nobj)
109.  		obj->unpaid = 0;
110.  	for(obj = fcobj; obj; obj = obj->nobj)
111.  		obj->unpaid = 0;
112.  	for(mtmp = fmon; mtmp; mtmp = mtmp->nmon)
113.  		for(obj = mtmp->minvent; obj; obj = obj->nobj)
114.  			obj->unpaid = 0;
115.  	for(mtmp = fallen_down; mtmp; mtmp = mtmp->nmon)
116.  		for(obj = mtmp->minvent; obj; obj = obj->nobj)
117.  			obj->unpaid = 0;
118.  	while(obj = billobjs){
119.  		billobjs = obj->nobj;
120.  		free((char *) obj);
121.  	}
122.  	ESHK(shopkeeper)->billct = 0;
123.  }
124.  
125.  static
126.  addupbill(){	/* delivers result in total */
127.  		/* caller has checked that shopkeeper exists */
128.  register ct = ESHK(shopkeeper)->billct;
129.  register struct bill_x *bp = bill;
130.  	total = 0;
131.  	while(ct--){
132.  		total += bp->price * bp->bquan;
133.  		bp++;
134.  	}
135.  }
136.  
137.  inshop(){
138.  register roomno = inroom(u.ux,u.uy);
139.  
140.  	/* Did we just leave a shop? */
141.  	if(u.uinshop &&
142.  	    (u.uinshop != roomno + 1 || shlevel != dlevel || !shopkeeper)) {
143.  
144.  	/* This is part of the bugfix for shopkeepers not having their
145.  	 * bill paid.  As reported by ab@unido -dgk
146.  	 * I made this standard due to the KOPS code below. -mrs 
147.  	 */
148.  		if(shopkeeper) {
149.  		    if(ESHK(shopkeeper)->billct) {
150.  			if(inroom(shopkeeper->mx, shopkeeper->my) 
151.  			    == u.uinshop - 1)	/* ab@unido */
152.  			    pline("Somehow you escaped the shop without paying!");
153.  			addupbill();
154.  			pline("You stole for a total worth of %ld zorkmids.",
155.  				total);
156.  			ESHK(shopkeeper)->robbed += total;
157.  #ifdef KOPS
158.  			/* Keystone Kops srt@ucla */
159.  			pline("An alarm sounds throughout the dungeon!");
160.  			pline("The Kops are after you!");
161.  #endif
162.  			setpaid();
163.  			if((rooms[ESHK(shopkeeper)->shoproom].rtype == GENERAL)
164.  			    == (rn2(3) == 0))
165.  			    ESHK(shopkeeper)->following = 1;
166.  #ifdef KOPS
167.  			{
168.  			    coord enexto();
169.  			    coord mm;
170.  			    register int cnt = dlevel + rnd(3);
171.  			    /* Create a swarm near the staircase */
172.  			    mm.x = xdnstair;
173.  			    mm.y = ydnstair;
174.  			    while(cnt--) {
175.  				    mm = enexto(mm.x, mm.y);
176.  				    (void) mkmon_at('K', mm.x, mm.y);
177.  			    }
178.  			    /* Create a swarm near the shopkeeper */
179.  			    cnt = dlevel + rnd(3);
180.  			    mm.x = shopkeeper->mx;
181.  			    mm.y = shopkeeper->my;
182.  			    while(cnt--) {
183.  				    mm = enexto(mm.x, mm.y);
184.  				    (void) mkmon_at('K', mm.x, mm.y);
185.  			    }
186.  			}
187.  #endif
188.  		    }
189.  		    shopkeeper = 0;
190.  		    shlevel = 0;
191.  		}
192.  		u.uinshop = 0;
193.  	}
194.  
195.  	/* Did we just enter a zoo of some kind? */
196.  	if(roomno >= 0) {
197.  		register int rt = rooms[roomno].rtype;
198.  		register struct monst *mtmp;
199.  		if(rt == ZOO) {
200.  			pline("Welcome to David's treasure zoo!");
201.  		} else
202.  		if(rt == SWAMP) {
203.  			pline("It looks rather muddy down here.");
204.  		} else
205.  		if(rt == COURT) {
206.  			pline("You are in an opulant throne room!");
207.  		} else
208.  		if(rt == MORGUE) {
209.  			if(midnight())
210.  				pline("Go away! Go away!");
211.  			else
212.  				pline("You get an uncanny feeling ...");
213.  		} else
214.  			rt = 0;
215.  		if(rt != 0) {
216.  			rooms[roomno].rtype = 0;
217.  			for(mtmp = fmon; mtmp; mtmp = mtmp->nmon)
218.  				if(rt != ZOO || !rn2(3))
219.  					mtmp->msleep = 0;
220.  		}
221.  	}
222.  
223.  	/* Did we just enter a shop? */
224.  	if(roomno >= 0 && rooms[roomno].rtype >= 8) {
225.  	    if(shlevel != dlevel || !shopkeeper
226.  				 || ESHK(shopkeeper)->shoproom != roomno)
227.  		findshk(roomno);
228.  	    if(!shopkeeper) {
229.  		rooms[roomno].rtype = 0;
230.  		u.uinshop = 0;
231.  	    } else if(!u.uinshop){
232.  		if(!ESHK(shopkeeper)->visitct ||
233.  		    strncmp(ESHK(shopkeeper)->customer, plname, PL_NSIZ)){
234.  
235.  		    /* He seems to be new here */
236.  		    ESHK(shopkeeper)->visitct = 0;
237.  		    ESHK(shopkeeper)->following = 0;
238.  		    (void) strncpy(ESHK(shopkeeper)->customer,plname,PL_NSIZ);
239.  		    NOTANGRY(shopkeeper) = 1;
240.  		}
241.  		if(!ESHK(shopkeeper)->following) {
242.  		    boolean box, pick;
243.  		    struct obj *carrying();
244.  
245.  		    pline("Hello %s! Welcome%s to %s's %s shop!",
246.  			plname,
247.  			ESHK(shopkeeper)->visitct++ ? " again" : "",
248.  			shkname(shopkeeper),
249.  			shopnam[rooms[ESHK(shopkeeper)->shoproom].rtype - 8] );
250.  		    box = carrying(ICE_BOX) != (struct obj *)0;
251.  		    pick = carrying(PICK_AXE) != (struct obj *)0;
252.  		    if(box || pick) {
253.  			if(dochug(shopkeeper)) {
254.  				u.uinshop = 0;	/* he died moving */
255.  				return(0);
256.  			}
257.  			pline("Will you please leave your %s outside?",
258.  			    (box && pick) ? "box and pick-axe" :
259.  			    box ? "box" : "pick-axe");
260.  		    }
261.  		}
262.  		u.uinshop = roomno + 1;
263.  	    }
264.  	}
265.  	return(u.uinshop);
266.  }
267.  
268.  static
269.  findshk(roomno)
270.  register roomno;
271.  {
272.  register struct monst *mtmp;
273.  	for(mtmp = fmon; mtmp; mtmp = mtmp->nmon)
274.  	    if(mtmp->isshk && ESHK(mtmp)->shoproom == roomno
275.  			   && ESHK(mtmp)->shoplevel == dlevel) {
276.  		shopkeeper = mtmp;
277.  		bill = &(ESHK(shopkeeper)->bill[0]);
278.  		shlevel = dlevel;
279.  		if(ANGRY(shopkeeper) &&
280.  		   strncmp(ESHK(shopkeeper)->customer,plname,PL_NSIZ))
281.  			NOTANGRY(shopkeeper) = 1;
282.  		/* billobjs = 0; -- this is wrong if we save in a shop */
283.  		/* (and it is harmless to have too many things in billobjs) */
284.  		return;
285.  	}
286.  	shopkeeper = 0;
287.  	shlevel = 0;
288.  	bill = (struct bill_x *) -1000;	/* dump core when referenced */
289.  }
290.  
291.  static struct bill_x *
292.  onbill(obj) register struct obj *obj; {
293.  register struct bill_x *bp;
294.  	if(!shopkeeper) return(0);
295.  	for(bp = bill; bp < &bill[ESHK(shopkeeper)->billct]; bp++)
296.  		if(bp->bo_id == obj->o_id) {
297.  			if(!obj->unpaid) pline("onbill: paid obj on bill?");
298.  			return(bp);
299.  		}
300.  	if(obj->unpaid) pline("onbill: unpaid obj not on bill?");
301.  	return(0);
302.  }
303.  
304.  /* called with two args on merge */
305.  obfree(obj,merge) register struct obj *obj, *merge; {
306.  register struct bill_x *bp = onbill(obj);
307.  register struct bill_x *bpm;
308.  	if(bp) {
309.  		if(!merge){
310.  			bp->useup = 1;
311.  			obj->unpaid = 0;	/* only for doinvbill */
312.  			obj->nobj = billobjs;
313.  			billobjs = obj;
314.  			return;
315.  		}
316.  		bpm = onbill(merge);
317.  		if(!bpm){
318.  			/* this used to be a rename */
319.  			impossible("obfree: not on bill??");
320.  			return;
321.  		} else {
322.  			/* this was a merger */
323.  			bpm->bquan += bp->bquan;
324.  			ESHK(shopkeeper)->billct--;
325.  			*bp = bill[ESHK(shopkeeper)->billct];
326.  		}
327.  	}
328.  	free((char *) obj);
329.  }
330.  
331.  static
332.  pay(tmp,shkp)
333.  long tmp;
334.  register struct monst *shkp;
335.  {
336.  	long robbed = ESHK(shkp)->robbed;
337.  
338.  	u.ugold -= tmp;
339.  	shkp->mgold += tmp;
340.  	flags.botl = 1;
341.  	if(robbed) {
342.  		robbed -= tmp;
343.  		if(robbed < 0) robbed = 0;
344.  		ESHK(shkp)->robbed = robbed;
345.  	}
346.  }
347.  
348.  dopay(){
349.  long ltmp;
350.  register struct bill_x *bp;
351.  register struct monst *shkp;
352.  int pass, tmp;
353.  
354.  	multi = 0;
355.  	(void) inshop();
356.  	for(shkp = fmon; shkp; shkp = shkp->nmon)
357.  		if(shkp->isshk && dist(shkp->mx,shkp->my) < 3)
358.  			break;
359.  	if(!shkp && u.uinshop &&
360.  	   inroom(shopkeeper->mx,shopkeeper->my) == ESHK(shopkeeper)->shoproom)
361.  		shkp = shopkeeper;
362.  
363.  	if(!shkp) {
364.  		pline("There is nobody here to receive your payment.");
365.  		return(0);
366.  	}
367.  	ltmp = ESHK(shkp)->robbed;
368.  	if(shkp != shopkeeper && NOTANGRY(shkp)) {
369.  		if(!ltmp) {
370.  			pline("You do not owe %s anything.", monnam(shkp));
371.  		} else
372.  		if(!u.ugold) {
373.  			pline("You have no money.");
374.  		} else {
375.  		    long ugold = u.ugold;
376.  
377.  		    if(u.ugold > ltmp) {
378.  			pline("You give %s the %ld gold pieces %s asked for.",
379.  			monnam(shkp), ltmp, index("@CGHKLOQTVWZ&ehimt", shkp->data->mlet)
380.  			? "he" : (index("nN", shkp->data->mlet) ? "she" : "it"));
381.  			pay(ltmp, shkp);
382.  		    } else {
383.  			pline("You give %s all your gold.", monnam(shkp));
384.  			pay(u.ugold, shkp);
385.  		    }
386.  		    if(ugold < ltmp/2) {
387.  			pline("Unfortunately, %s doesn't look satisfied.",
388.  			index("@CGHKLOQTVWZ&ehimt", shkp->data->mlet)
389.  			? "he" : (index("nN", shkp->data->mlet) ? "she" : "it"));
390.  		    } else {
391.  			ESHK(shkp)->robbed = 0;
392.  			ESHK(shkp)->following = 0;
393.  			if(ESHK(shkp)->shoplevel != dlevel) {
394.  			/* For convenience's sake, let him disappear */
395.  			    shkp->minvent = 0;		/* %% */
396.  			    shkp->mgold = 0;
397.  			    mondead(shkp);
398.  			}
399.  		    }
400.  		}
401.  		return(1);
402.  	}
403.  		
404.  	if(!ESHK(shkp)->billct){
405.  		pline("You do not owe %s anything.", monnam(shkp));
406.  		if(!u.ugold){
407.  			pline("Moreover, you have no money.");
408.  			return(1);
409.  		}
410.  		if(ESHK(shkp)->robbed){
411.  			pline("But since %s shop has been robbed recently,",
412.  			index("@CGHKLOQTVWZ&ehimt", shkp->data->mlet)
413.  			? "his" : (index("nN", shkp->data->mlet) ? "her" : "its"));
414.  		    pline("you %srepay %s's expenses.",
415.  		      (u.ugold < ESHK(shkp)->robbed) ? "partially " : "",
416.  		      monnam(shkp));
417.  		    pay(min(u.ugold, ESHK(shkp)->robbed), shkp);
418.  		    ESHK(shkp)->robbed = 0;
419.  		    return(1);
420.  		}
421.  		if(ANGRY(shkp)){
422.  			pline("But in order to appease %s,",
423.  				amonnam(shkp, "angry"));
424.  			if(u.ugold >= 1000){
425.  				ltmp = 1000;
426.  				pline(" you give %s 1000 gold pieces.",
427.  				index("@CGHKLOQTVWZ&ehimt", shkp->data->mlet)
428.  				? "him" : (index("nN", shkp->data->mlet) ? "her" : "it"));
429.  			} else {
430.  				ltmp = u.ugold;
431.  				pline(" you give %s all your money.",
432.  				index("@CGHKLOQTVWZ&ehimt", shkp->data->mlet)
433.  				? "him" : (index("nN", shkp->data->mlet) ? "her" : "it"));
434.  			}
435.  			pay(ltmp, shkp);
436.  			if(strncmp(ESHK(shkp)->customer, plname, PL_NSIZ)
437.  			   || rn2(3)){
438.  				pline("%s calms down.", Monnam(shkp));
439.  				NOTANGRY(shkp) = 1;
440.  			} else	pline("%s is as angry as ever.",
441.  					Monnam(shkp));
442.  		}
443.  		return(1);
444.  	}
445.  	if(shkp != shopkeeper) {
446.  		impossible("dopay: not to shopkeeper?");
447.  		if(shopkeeper) setpaid();
448.  		return(0);
449.  	}
450.  	for(pass = 0; pass <= 1; pass++) {
451.  		tmp = 0;
452.  		while(tmp < ESHK(shopkeeper)->billct) {
453.  			bp = &bill[tmp];
454.  			if(!pass && !bp->useup) {
455.  				tmp++;
456.  				continue;
457.  			}
458.  			if(!dopayobj(bp)) return(1);
459.  #ifdef MSDOS
460.  			*bp = bill[--ESHK(shopkeeper)->billct];
461.  #else
462.  			bill[tmp] = bill[--ESHK(shopkeeper)->billct];
463.  #endif /* MSDOS /**/
464.  		}
465.  	}
466.  	pline("Thank you for shopping in %s's %s store!",
467.  		shkname(shopkeeper),
468.  		shopnam[rooms[ESHK(shopkeeper)->shoproom].rtype - 8]);
469.  	NOTANGRY(shopkeeper) = 1;
470.  	return(1);
471.  }
472.  
473.  /* return 1 if paid successfully */
474.  /*        0 if not enough money */
475.  /*       -1 if object could not be found (but was paid) */
476.  static
477.  dopayobj(bp) register struct bill_x *bp; {
478.  register struct obj *obj;
479.  long ltmp;
480.  
481.  	/* find the object on one of the lists */
482.  	obj = bp_to_obj(bp);
483.  
484.  	if(!obj) {
485.  		impossible("Shopkeeper administration out of order.");
486.  		setpaid();	/* be nice to the player */
487.  		return(0);
488.  	}
489.  
490.  	if(!obj->unpaid && !bp->useup){
491.  		impossible("Paid object on bill??");
492.  		return(1);
493.  	}
494.  	obj->unpaid = 0;
495.  	ltmp = bp->price * bp->bquan;
496.  	if(ANGRY(shopkeeper)) ltmp += ltmp/3;
497.  	if(u.ugold < ltmp){
498.  		pline("You don't have gold enough to pay %s.",
499.  			doname(obj));
500.  		obj->unpaid = 1;
501.  		return(0);
502.  	}
503.  	pay(ltmp, shopkeeper);
504.  	pline("You bought %s for %ld gold piece%s.",
505.  		doname(obj), ltmp, plur(ltmp));
506.  	if(bp->useup) {
507.  		register struct obj *otmp = billobjs;
508.  		if(obj == billobjs)
509.  			billobjs = obj->nobj;
510.  		else {
511.  			while(otmp && otmp->nobj != obj) otmp = otmp->nobj;
512.  			if(otmp) otmp->nobj = obj->nobj;
513.  			else pline("Error in shopkeeper administration.");
514.  		}
515.  		free((char *) obj);
516.  	}
517.  	return(1);
518.  }
519.  
520.  /* routine called after dying (or quitting) with nonempty bill */
521.  paybill(){
522.  	if(shlevel == dlevel && shopkeeper && ESHK(shopkeeper)->billct){
523.  		addupbill();
524.  		if(total > u.ugold){
525.  			shopkeeper->mgold += u.ugold;
526.  			u.ugold = 0;
527.  		pline("%s comes and takes all your possessions.",
528.  			Monnam(shopkeeper));
529.  		} else {
530.  			u.ugold -= total;
531.  			shopkeeper->mgold += total;
532.  	pline("%s comes and takes the %ld zorkmids you owed him.",
533.  		Monnam(shopkeeper), total);
534.  		}
535.  		setpaid();	/* in case we create bones */
536.  	}
537.  }
538.  
539.  /* find obj on one of the lists */
540.  struct obj *
541.  bp_to_obj(bp)
542.  register struct bill_x *bp;
543.  {
544.  	register struct obj *obj;
545.  	register struct monst *mtmp;
546.  	register unsigned id = bp->bo_id;
547.  
548.  	if(bp->useup)
549.  		obj = o_on(id, billobjs);
550.  	else if(!(obj = o_on(id, invent)) &&
551.  		!(obj = o_on(id, fobj)) &&
552.  		!(obj = o_on(id, fcobj))) {
553.  		    for(mtmp = fmon; mtmp; mtmp = mtmp->nmon)
554.  			if(obj = o_on(id, mtmp->minvent))
555.  			    break;
556.  		    for(mtmp = fallen_down; mtmp; mtmp = mtmp->nmon)
557.  			if(obj = o_on(id, mtmp->minvent))
558.  			    break;
559.  		}
560.  	return(obj);
561.  }
562.  
563.  /* called in hack.c when we pickup an object */
564.  addtobill(obj) register struct obj *obj; {
565.  register struct bill_x *bp;
566.  	if(!inshop() ||
567.  	(u.ux == ESHK(shopkeeper)->shk.x && u.uy == ESHK(shopkeeper)->shk.y) ||
568.  	(u.ux == ESHK(shopkeeper)->shd.x && u.uy == ESHK(shopkeeper)->shd.y) ||
569.  		onbill(obj) /* perhaps we threw it away earlier */
570.  	  ) return;
571.  	if(ESHK(shopkeeper)->billct == BILLSZ){
572.  		pline("You got that for free!");
573.  		return;
574.  	}
575.  #ifdef DGKMOD
576.  	/* To recognize objects the showkeeper is not interested in. -dgk
577.  	 */
578.  	if (obj->no_charge) {
579.  		obj->no_charge = 0;
580.  		return;
581.  	}
582.  #endif
583.  	bp = &bill[ESHK(shopkeeper)->billct];
584.  	bp->bo_id = obj->o_id;
585.  	bp->bquan = obj->quan;
586.  	bp->useup = 0;
587.  	bp->price = getprice(obj);
588.  	ESHK(shopkeeper)->billct++;
589.  	obj->unpaid = 1;
590.  }
591.  
592.  splitbill(obj,otmp) register struct obj *obj, *otmp; {
593.  	/* otmp has been split off from obj */
594.  register struct bill_x *bp;
595.  register int tmp;
596.  	bp = onbill(obj);
597.  	if(!bp) {
598.  		impossible("splitbill: not on bill?");
599.  		return;
600.  	}
601.  	if(bp->bquan < otmp->quan) {
602.  		impossible("Negative quantity on bill??");
603.  	}
604.  	if(bp->bquan == otmp->quan) {
605.  		impossible("Zero quantity on bill??");
606.  	}
607.  	bp->bquan -= otmp->quan;
608.  
609.  	/* addtobill(otmp); */
610.  	if(ESHK(shopkeeper)->billct == BILLSZ) otmp->unpaid = 0;
611.  	else {
612.  		tmp = bp->price;
613.  		bp = &bill[ESHK(shopkeeper)->billct];
614.  		bp->bo_id = otmp->o_id;
615.  		bp->bquan = otmp->quan;
616.  		bp->useup = 0;
617.  		bp->price = tmp;
618.  		ESHK(shopkeeper)->billct++;
619.  	}
620.  }
621.  
622.  subfrombill(obj) register struct obj *obj; {
623.  long ltmp;
624.  register int tmp;
625.  register struct obj *otmp;
626.  register struct bill_x *bp;
627.  	if(!inshop() || (u.ux == ESHK(shopkeeper)->shk.x && u.uy == ESHK(shopkeeper)->shk.y) ||
628.  		(u.ux == ESHK(shopkeeper)->shd.x && u.uy == ESHK(shopkeeper)->shd.y))
629.  		return;
630.  	if((bp = onbill(obj)) != 0){
631.  		obj->unpaid = 0;
632.  		if(bp->bquan > obj->quan){
633.  			otmp = newobj(0);
634.  			*otmp = *obj;
635.  			bp->bo_id = otmp->o_id = flags.ident++;
636.  			otmp->quan = (bp->bquan -= obj->quan);
637.  			otmp->owt = 0;	/* superfluous */
638.  			otmp->onamelth = 0;
639.  			bp->useup = 1;
640.  			otmp->nobj = billobjs;
641.  			billobjs = otmp;
642.  			return;
643.  		}
644.  		ESHK(shopkeeper)->billct--;
645.  		*bp = bill[ESHK(shopkeeper)->billct];
646.  		return;
647.  	}
648.  	if(obj->unpaid){
649.  		pline("%s didn't notice.", Monnam(shopkeeper));
650.  		obj->unpaid = 0;
651.  		return;		/* %% */
652.  	}
653.  	/* he dropped something of his own - probably wants to sell it */
654.  	if(shopkeeper->msleep || shopkeeper->mfroz ||
655.  		inroom(shopkeeper->mx,shopkeeper->my) != ESHK(shopkeeper)->shoproom)
656.  		return;
657.  	if(ESHK(shopkeeper)->billct == BILLSZ ||
658.  	  ((tmp = shtypes[rooms[ESHK(shopkeeper)->shoproom].rtype-8]) && tmp != obj->olet)
659.  	  || index("_0", obj->olet)) {
660.  		pline("%s seems not interested.", Monnam(shopkeeper));
661.  #ifdef DGKMOD
662.  		obj->no_charge = 1;
663.  #endif
664.  		return;
665.  	}
666.  	ltmp = getprice(obj) * obj->quan;
667.  	if(ANGRY(shopkeeper)) {
668.  		ltmp /= 3;
669.  		NOTANGRY(shopkeeper) = 1;
670.  	} else	ltmp /= 2;
671.  	if(ESHK(shopkeeper)->robbed){
672.  		if((ESHK(shopkeeper)->robbed -= ltmp) < 0)
673.  			ESHK(shopkeeper)->robbed = 0;
674.  pline("Thank you for your contribution to restock this recently plundered shop.");
675.  		return;
676.  	}
677.  	if(ltmp > shopkeeper->mgold)
678.  		ltmp = shopkeeper->mgold;
679.  	pay(-ltmp, shopkeeper);
680.  	if(!ltmp) {
681.  		pline("%s gladly accepts %s but cannot pay you at present.",
682.  			Monnam(shopkeeper), doname(obj));
683.  #ifdef DGKMOD
684.  			obj->no_charge = 1;
685.  #endif
686.  	} else
687.  	pline("You sold %s and got %ld gold piece%s.", doname(obj), ltmp,
688.  		plur(ltmp));
689.  }
690.  
691.  doinvbill(mode)
692.  int mode;		/* 0: deliver count 1: paged */
693.  {
694.  	register struct bill_x *bp;
695.  	register struct obj *obj;
696.  	long totused, thisused;
697.  	char buf[BUFSZ];
698.  
699.  	if(mode == 0) {
700.  	    register int cnt = 0;
701.  
702.  	    if(shopkeeper)
703.  		for(bp = bill; bp - bill < ESHK(shopkeeper)->billct; bp++)
704.  		    if(bp->useup ||
705.  		      ((obj = bp_to_obj(bp)) && obj->quan < bp->bquan))
706.  			cnt++;
707.  	    return(cnt);
708.  	}
709.  
710.  	if(!shopkeeper) {
711.  		impossible("doinvbill: no shopkeeper?");
712.  		return(0);
713.  	}
714.  
715.  	set_pager(0);
716.  	if(page_line("Unpaid articles already used up:") || page_line(""))
717.  	    goto quit;
718.  
719.  	totused = 0;
720.  	for(bp = bill; bp - bill < ESHK(shopkeeper)->billct; bp++) {
721.  	    obj = bp_to_obj(bp);
722.  	    if(!obj) {
723.  		impossible("Bad shopkeeper administration.");
724.  		goto quit;
725.  	    }
726.  	    if(bp->useup || bp->bquan > obj->quan) {
727.  		register int cnt, oquan, uquan;
728.  
729.  		oquan = obj->quan;
730.  		uquan = (bp->useup ? bp->bquan : bp->bquan - oquan);
731.  		thisused = bp->price * uquan;
732.  		totused += thisused;
733.  		obj->quan = uquan;		/* cheat doname */
734.  		(void) sprintf(buf, "x -  %s", doname(obj));
735.  		obj->quan = oquan;		/* restore value */
736.  		for(cnt = 0; buf[cnt]; cnt++);
737.  		while(cnt < 50)
738.  			buf[cnt++] = ' ';
739.  		(void) sprintf(&buf[cnt], " %5ld zorkmids", thisused);
740.  		if(page_line(buf))
741.  			goto quit;
742.  	    }
743.  	}
744.  	(void) sprintf(buf, "Total:%50ld zorkmids", totused);
745.  	if(page_line("") || page_line(buf))
746.  		goto quit;
747.  	set_pager(1);
748.  	return(0);
749.  quit:
750.  	set_pager(2);
751.  	return(0);
752.  }
753.  
754.  static
755.  getprice(obj) register struct obj *obj; {
756.  register int tmp, ac;
757.  	switch(obj->olet){
758.  	case AMULET_SYM:
759.  		tmp = 10*rnd(500);
760.  		break;
761.  	case TOOL_SYM:
762.  		tmp = 10*rnd((obj->otyp == EXPENSIVE_CAMERA) ? 150 :
763.  #ifdef MARKER
764.  			(obj->otyp == MAGIC_MARKER) ? 100 :
765.  #endif
766.  			30);
767.  		break;
768.  	case RING_SYM:
769.  		tmp = 10*rnd(100);
770.  		break;
771.  	case WAND_SYM:
772.  		tmp = 10*rnd(100);
773.  		break;
774.  	case SCROLL_SYM:
775.  		tmp = 10*rnd(50);
776.  #ifdef MAIL
777.  		if(obj->otyp == SCR_MAIL)
778.  			tmp = rnd(5);
779.  #endif
780.  		break;
781.  	case POTION_SYM:
782.  		tmp = 10*rnd(50);
783.  		break;
784.  #ifdef SPELLS
785.  	case SPBOOK_SYM:
786.  		tmp = 10*rnd(200);
787.  		break;
788.  #endif
789.  	case FOOD_SYM:
790.  		tmp = 10*rnd(5 + (2000/realhunger()));
791.  		break;
792.  	case GEM_SYM:
793.  		tmp = 10*rnd(20);
794.  		break;
795.  	case ARMOR_SYM:
796.  		ac = ARM_BONUS(obj);
797.  		if(ac <= -10)		/* probably impossible */
798.  			ac = -9;
799.  		tmp = 100 + ac*ac*rnd(10+ac);
800.  		break;
801.  	case WEAPON_SYM:
802.  		if(obj->otyp < BOOMERANG)
803.  			tmp = 5*rnd(10);
804.  		else if(obj->otyp == KATANA)
805.  			tmp = 10*rnd(200);
806.  		else if(obj->otyp == LONG_SWORD ||
807.  			obj->otyp == TWO_HANDED_SWORD)
808.  			tmp = 10*rnd(150);
809.  		else	tmp = 10*rnd(75);
810.  		break;
811.  	case CHAIN_SYM:
812.  		pline("Strange ..., carrying a chain?");
813.  	case BALL_SYM:
814.  		tmp = 10;
815.  		break;
816.  	default:
817.  		tmp = 10000;
818.  	}
819.  	return(tmp);
820.  }
821.  
822.  static
823.  realhunger(){	/* not completely foolproof */
824.  register tmp = u.uhunger;
825.  register struct obj *otmp = invent;
826.  	while(otmp){
827.  		if(otmp->olet == FOOD_SYM && !otmp->unpaid)
828.  			tmp += objects[otmp->otyp].nutrition;
829.  		otmp = otmp->nobj;
830.  	}
831.  	return((tmp <= 0) ? 1 : tmp);
832.  }
833.  
834.  shkcatch(obj)
835.  register struct obj *obj;
836.  {
837.  	register struct monst *shkp = shopkeeper;
838.  
839.  	if(u.uinshop && shkp && !shkp->mfroz && !shkp->msleep &&
840.  	    u.dx && u.dy &&
841.  	    inroom(u.ux+u.dx, u.uy+u.dy) + 1 == u.uinshop &&
842.  	    shkp->mx == ESHK(shkp)->shk.x && shkp->my == ESHK(shkp)->shk.y &&
843.  	    u.ux == ESHK(shkp)->shd.x && u.uy == ESHK(shkp)->shd.y) {
844.  		pline("%s nimbly catches the %s.", Monnam(shkp), xname(obj));
845.  		obj->nobj = shkp->minvent;
846.  		shkp->minvent = obj;
847.  		return(1);
848.  	}
849.  	return(0);
850.  }
851.  
852.  /*
853.   * shk_move: return 1: he moved  0: he didnt  -1: let m_move do it
854.   */
855.  shk_move(shkp)
856.  register struct monst *shkp;
857.  {
858.  	register struct monst *mtmp;
859.  	register struct permonst *mdat = shkp->data;
860.  	register xchar gx,gy,omx,omy,nx,ny,nix,niy;
861.  	register schar appr,i;
862.  	register int udist;
863.  	int z;
864.  	schar shkroom,chi,chcnt,cnt;
865.  	boolean uondoor, satdoor, avoid, badinv;
866.  	coord poss[9];
867.  	long info[9];
868.  	struct obj *ib = 0;
869.  
870.  	omx = shkp->mx;
871.  	omy = shkp->my;
872.  
873.  	if((udist = dist(omx,omy)) < 3) {
874.  		if(ANGRY(shkp)) {
875.  			(void) hitu(shkp, d(mdat->damn, mdat->damd)+1);
876.  			return(0);
877.  		}
878.  		if(ESHK(shkp)->following) {
879.  			if(strncmp(ESHK(shkp)->customer, plname, PL_NSIZ)){
880.  				pline("Hello %s! I was looking for %s.",
881.  					plname, ESHK(shkp)->customer);
882.  				ESHK(shkp)->following = 0;
883.  				return(0);
884.  			}
885.  			if(!ESHK(shkp)->robbed) {	/* impossible? */
886.  				ESHK(shkp)->following = 0;
887.  				return(0);
888.  			}
889.  			if(moves > followmsg+4) {
890.  				pline("Hello %s! Didn't you forget to pay?",
891.  					plname);
892.  				followmsg = moves;
893.  			}
894.  			if(udist < 2)
895.  				return(0);
896.  		}
897.  	}
898.  
899.  	shkroom = inroom(omx,omy);
900.  	appr = 1;
901.  	gx = ESHK(shkp)->shk.x;
902.  	gy = ESHK(shkp)->shk.y;
903.  	satdoor = (gx == omx && gy == omy);
904.  	if(ESHK(shkp)->following || ((z = holetime()) >= 0 && z*z <= udist)){
905.  		gx = u.ux;
906.  		gy = u.uy;
907.  		if(shkroom < 0 || shkroom != inroom(u.ux,u.uy))
908.  		    if(udist > 4)
909.  			return(-1);	/* leave it to m_move */
910.  	} else if(ANGRY(shkp)) {
911.  		long saveBlind = Blind;
912.  		Blind = 0;
913.  		if(shkp->mcansee && !Invis && cansee(omx,omy)) {
914.  			gx = u.ux;
915.  			gy = u.uy;
916.  		}
917.  		Blind = saveBlind;
918.  		avoid = FALSE;
919.  	} else {
920.  #define	GDIST(x,y)	((x-gx)*(x-gx)+(y-gy)*(y-gy))
921.  		if(Invis)
922.  		  avoid = FALSE;
923.  		else {
924.  		  uondoor = (u.ux == ESHK(shkp)->shd.x &&
925.  				u.uy == ESHK(shkp)->shd.y);
926.  		  if(uondoor) {
927.  		    if(ESHK(shkp)->billct)
928.  			pline("Hello %s! Will you please pay before leaving?",
929.  				plname);
930.  		    badinv = (carrying(PICK_AXE) || carrying(ICE_BOX));
931.  		    if(satdoor && badinv)
932.  			return(0);
933.  		    avoid = !badinv;
934.  		  } else {
935.  		    avoid = (u.uinshop && dist(gx,gy) > 8);
936.  		    badinv = FALSE;
937.  		  }
938.  
939.  		  if(((!ESHK(shkp)->robbed && !ESHK(shkp)->billct) || avoid)
940.  			&& GDIST(omx,omy) < 3){
941.  			if(!badinv && !online(omx,omy))
942.  				return(0);
943.  			if(satdoor)
944.  				appr = gx = gy = 0;
945.  		  }
946.  		}
947.  	}
948.  	if(omx == gx && omy == gy)
949.  		return(0);
950.  	if(shkp->mconf) {
951.  		avoid = FALSE;
952.  		appr = 0;
953.  	}
954.  	nix = omx;
955.  	niy = omy;
956.  	cnt = mfndpos(shkp,poss,info,ALLOW_SSM);
957.  	if(avoid && uondoor) {		/* perhaps we cannot avoid him */
958.  		for(i=0; i<cnt; i++)
959.  			if(!(info[i] & NOTONL)) goto notonl_ok;
960.  		avoid = FALSE;
961.  	notonl_ok:
962.  		;
963.  	}
964.  	chi = -1;
965.  	chcnt = 0;
966.  	for(i=0; i<cnt; i++){
967.  		nx = poss[i].x;
968.  		ny = poss[i].y;
969.  		if(levl[nx][ny].typ == ROOM
970.  		|| shkroom != ESHK(shkp)->shoproom
971.  		|| ESHK(shkp)->following) {
972.  #ifdef STUPID
973.  		    /* cater for stupid compilers */
974.  		    register int zz;
975.  #endif
976.  		    if(uondoor && (ib = sobj_at(ICE_BOX, nx, ny))) {
977.  			nix = nx; niy = ny; chi = i; break;
978.  		    }
979.  		    if(avoid && (info[i] & NOTONL))
980.  			continue;
981.  		    if((!appr && !rn2(++chcnt)) ||
982.  #ifdef STUPID
983.  			(appr && (zz = GDIST(nix,niy)) && zz > GDIST(nx,ny))
984.  #else
985.  			(appr && GDIST(nx,ny) < GDIST(nix,niy))
986.  #endif
987.  			) {
988.  			    nix = nx;
989.  			    niy = ny;
990.  			    chi = i;
991.  		    }
992.  		}
993.  	}
994.  	if(nix != omx || niy != omy){
995.  		if(info[chi] & ALLOW_M){
996.  			mtmp = m_at(nix,niy);
997.  			if(hitmm(shkp,mtmp) == 1 && rn2(3) &&
998.  			   hitmm(mtmp,shkp) == 2) return(2);
999.  			return(0);
1000. 		} else if(info[chi] & ALLOW_U){
1001. 			(void) hitu(shkp, d(mdat->damn, mdat->damd)+1);
1002. 			return(0);
1003. 		}
1004. 		shkp->mx = nix;
1005. 		shkp->my = niy;
1006. 		pmon(shkp);
1007. 		if(ib) {
1008. 			freeobj(ib);
1009. 			mpickobj(shkp, ib);
1010. 		}
1011. 		return(1);
1012. 	}
1013. 	return(0);
1014. }
1015. #endif /* QUEST /**/
1016. 
1017. online(x,y) {
1018. 	return(x==u.ux || y==u.uy ||
1019. 		(x-u.ux)*(x-u.ux) == (y-u.uy)*(y-u.uy));
1020. }
1021. 
1022. /* Does this monster follow me downstairs? */
1023. follower(mtmp)
1024. register struct monst *mtmp;
1025. {
1026. 	return( mtmp->mtame || index("1TVWZi&, ", mtmp->data->mlet) ||
1027. 		(mtmp->isshk && ESHK(mtmp)->following) );
1028. }
1029. 
1030. /* He is digging in the shop. */
1031. shopdig(fall)
1032. register int fall;
1033. {
1034.     if(!fall) {
1035. 	if(u.utraptype == TT_PIT)
1036. 	    pline("\"Be careful, sir, or you might fall through the floor.\"");
1037. 	else
1038. 	    pline("\"Please, do not damage the floor here.\"");
1039.     } else if(dist(shopkeeper->mx, shopkeeper->my) < 3) {
1040. 	register struct obj *obj, *obj2;
1041. 
1042. 	pline("%s grabs your backpack!", shkname(shopkeeper));
1043. 	for(obj = invent; obj; obj = obj2) {
1044. 		obj2 = obj->nobj;
1045. 		if(obj->owornmask) continue;
1046. 		freeinv(obj);
1047. 		obj->nobj = shopkeeper->minvent;
1048. 		shopkeeper->minvent = obj;
1049. 		if(obj->unpaid)
1050. 			subfrombill(obj);
1051. 	}
1052.     }
1053. }