Bug Summary

File:src/games/hack/hack.shk.c
Warning:line 1054, column 10
Branch condition evaluates to a garbage value

Annotated Source Code

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clang -cc1 -cc1 -triple amd64-unknown-openbsd7.0 -analyze -disable-free -disable-llvm-verifier -discard-value-names -main-file-name hack.shk.c -analyzer-store=region -analyzer-opt-analyze-nested-blocks -analyzer-checker=core -analyzer-checker=apiModeling -analyzer-checker=unix -analyzer-checker=deadcode -analyzer-checker=security.insecureAPI.UncheckedReturn -analyzer-checker=security.insecureAPI.getpw -analyzer-checker=security.insecureAPI.gets -analyzer-checker=security.insecureAPI.mktemp -analyzer-checker=security.insecureAPI.mkstemp -analyzer-checker=security.insecureAPI.vfork -analyzer-checker=nullability.NullPassedToNonnull -analyzer-checker=nullability.NullReturnedFromNonnull -analyzer-output plist -w -setup-static-analyzer -mrelocation-model pic -pic-level 1 -pic-is-pie -mframe-pointer=all -relaxed-aliasing -fno-rounding-math -mconstructor-aliases -munwind-tables -target-cpu x86-64 -target-feature +retpoline-indirect-calls -target-feature +retpoline-indirect-branches -tune-cpu generic -debugger-tuning=gdb -fcoverage-compilation-dir=/usr/src/games/hack/obj -resource-dir /usr/local/lib/clang/13.0.0 -I . -internal-isystem /usr/local/lib/clang/13.0.0/include -internal-externc-isystem /usr/include -O2 -fdebug-compilation-dir=/usr/src/games/hack/obj -ferror-limit 19 -fwrapv -D_RET_PROTECTOR -ret-protector -fgnuc-version=4.2.1 -vectorize-loops -vectorize-slp -fno-builtin-malloc -fno-builtin-calloc -fno-builtin-realloc -fno-builtin-valloc -fno-builtin-free -fno-builtin-strdup -fno-builtin-strndup -analyzer-output=html -faddrsig -D__GCC_HAVE_DWARF2_CFI_ASM=1 -o /home/ben/Projects/vmm/scan-build/2022-01-12-194120-40624-1 -x c /usr/src/games/hack/hack.shk.c
1/* $OpenBSD: hack.shk.c,v 1.13 2016/01/09 18:33:15 mestre Exp $ */
2
3/*
4 * Copyright (c) 1985, Stichting Centrum voor Wiskunde en Informatica,
5 * Amsterdam
6 * All rights reserved.
7 *
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions are
10 * met:
11 *
12 * - Redistributions of source code must retain the above copyright notice,
13 * this list of conditions and the following disclaimer.
14 *
15 * - Redistributions in binary form must reproduce the above copyright
16 * notice, this list of conditions and the following disclaimer in the
17 * documentation and/or other materials provided with the distribution.
18 *
19 * - Neither the name of the Stichting Centrum voor Wiskunde en
20 * Informatica, nor the names of its contributors may be used to endorse or
21 * promote products derived from this software without specific prior
22 * written permission.
23 *
24 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
25 * IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
26 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
27 * PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER
28 * OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
29 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
30 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
31 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
32 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
33 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
34 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
35 */
36
37/*
38 * Copyright (c) 1982 Jay Fenlason <hack@gnu.org>
39 * All rights reserved.
40 *
41 * Redistribution and use in source and binary forms, with or without
42 * modification, are permitted provided that the following conditions
43 * are met:
44 * 1. Redistributions of source code must retain the above copyright
45 * notice, this list of conditions and the following disclaimer.
46 * 2. Redistributions in binary form must reproduce the above copyright
47 * notice, this list of conditions and the following disclaimer in the
48 * documentation and/or other materials provided with the distribution.
49 * 3. The name of the author may not be used to endorse or promote products
50 * derived from this software without specific prior written permission.
51 *
52 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES,
53 * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY
54 * AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL
55 * THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
56 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
57 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
58 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
59 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
60 * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
61 * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
62 */
63
64#include <stdio.h>
65#include <stdlib.h>
66
67#include "hack.h"
68
69#ifdef QUEST
70int shlevel = 0;
71struct monst *shopkeeper = 0;
72struct obj *billobjs = 0;
73
74void
75obfree(struct obj *obj, struct obj *merge)
76{
77 free(obj);
78}
79
80int
81inshop(void)
82{
83 return(0);
84}
85
86void
87shopdig(int a)
88{}
89
90void
91addtobill(struct obj *ign)
92{}
93
94void
95subfrombill(struct obj *ign)
96{}
97
98void
99splitbill(struct obj *ign, struct obj *ign2)
100{}
101
102int
103dopay(void)
104{
105 return(0);
106}
107
108void
109paybill(void)
110{}
111
112int
113doinvbill(int a)
114{
115 return(0);
116}
117
118void
119shkdead(struct monst *ign)
120{}
121
122int
123shkcatch(struct obj *ign)
124{
125 return(0);
126}
127
128int
129shk_move(struct monst *ign)
130{
131 return(0);
132}
133
134void
135replshk(struct monst *mtmp, struct monst *mtmp2)
136{}
137
138char *
139shkname(struct monst *ign)
140{
141 return("");
142}
143
144#else /* QUEST */
145#include "hack.mfndpos.h"
146#include "def.eshk.h"
147
148#define ESHK(mon)((struct eshk *)(&(mon->mextra[0]))) ((struct eshk *)(&(mon->mextra[0])))
149#define NOTANGRY(mon)mon->mpeaceful mon->mpeaceful
150#define ANGRY(mon)!mon->mpeaceful !NOTANGRY(mon)mon->mpeaceful
151
152extern char plname[];
153
154/* Descriptor of current shopkeeper. Note that the bill need not be
155 * per-shopkeeper, since it is valid only when in a shop.
156 */
157static struct monst *shopkeeper = 0;
158static struct bill_x *bill;
159static int shlevel = 0; /* level of this shopkeeper */
160struct obj *billobjs; /* objects on bill with bp->useup */
161 /* only accessed here and by save & restore */
162static long int total; /* filled by addupbill() */
163static long int followmsg; /* last time of follow message */
164
165/*
166 * invariants: obj->unpaid iff onbill(obj) [unless bp->useup]
167 * obj->quan <= bp->bquan
168 */
169
170
171char shtypes[] = { /* 8 shoptypes: 7 specialized, 1 mixed */
172 RING_SYM'=', WAND_SYM'/', WEAPON_SYM')', FOOD_SYM'%', SCROLL_SYM'?',
173 POTION_SYM'!', ARMOR_SYM'[', 0
174};
175
176static char *shopnam[] = {
177 "engagement ring", "walking cane", "antique weapon",
178 "delicatessen", "second hand book", "liquor",
179 "used armor", "assorted antiques"
180};
181
182static void setpaid(void);
183static void addupbill(void);
184static void findshk(int);
185static struct bill_x *onbill(struct obj *);
186static void pay(long, struct monst *);
187static int dopayobj(struct bill_x *);
188static struct obj *bp_to_obj(struct bill_x *);
189static int getprice(struct obj *);
190static int realhunger(void);
191
192/* called in do_name.c */
193char *
194shkname(struct monst *mtmp)
195{
196 return(ESHK(mtmp)((struct eshk *)(&(mtmp->mextra[0])))->shknam);
197}
198
199void
200shkdead(struct monst *mtmp) /* called in mon.c */
201{
202 struct eshk *eshk = ESHK(mtmp)((struct eshk *)(&(mtmp->mextra[0])));
203
204 if(eshk->shoplevel == dlevel)
205 rooms[eshk->shoproom].rtype = 0;
206 if(mtmp == shopkeeper) {
207 setpaid();
208 shopkeeper = 0;
209 bill = (struct bill_x *) -1000; /* dump core when referenced */
210 }
211}
212
213void
214replshk(struct monst *mtmp, struct monst *mtmp2)
215{
216 if(mtmp == shopkeeper) {
217 shopkeeper = mtmp2;
218 bill = &(ESHK(shopkeeper)((struct eshk *)(&(shopkeeper->mextra[0])))->bill[0]);
219 }
220}
221
222/* caller has checked that shopkeeper exists */
223/* either we paid or left the shop or he just died */
224static void
225setpaid(void)
226{
227 struct obj *obj;
228 struct monst *mtmp;
229
230 for(obj = invent; obj; obj = obj->nobj)
231 obj->unpaid = 0;
232 for(obj = fobj; obj; obj = obj->nobj)
233 obj->unpaid = 0;
234 for(obj = fcobj; obj; obj = obj->nobj)
235 obj->unpaid = 0;
236 for(mtmp = fmon; mtmp; mtmp = mtmp->nmon)
237 for(obj = mtmp->minvent; obj; obj = obj->nobj)
238 obj->unpaid = 0;
239 for(mtmp = fallen_down; mtmp; mtmp = mtmp->nmon)
240 for(obj = mtmp->minvent; obj; obj = obj->nobj)
241 obj->unpaid = 0;
242 while ((obj = billobjs)) {
243 billobjs = obj->nobj;
244 free(obj);
245 }
246 ESHK(shopkeeper)((struct eshk *)(&(shopkeeper->mextra[0])))->billct = 0;
247}
248
249/* delivers result in total */
250/* caller has checked that shopkeeper exists */
251static void
252addupbill(void)
253{
254 int ct = ESHK(shopkeeper)((struct eshk *)(&(shopkeeper->mextra[0])))->billct;
255 struct bill_x *bp = bill;
256
257 total = 0;
258 while(ct--){
259 total += bp->price * bp->bquan;
260 bp++;
261 }
262}
263
264int
265inshop(void)
266{
267 int roomno = inroom(u.ux,u.uy);
268
269 /* Did we just leave a shop? */
270 if(u.uinshop &&
271 (u.uinshop != roomno + 1 || shlevel != dlevel || !shopkeeper)) {
272 if(shopkeeper) {
273 if(ESHK(shopkeeper)((struct eshk *)(&(shopkeeper->mextra[0])))->billct) {
274 if(inroom(shopkeeper->mx, shopkeeper->my)
275 == u.uinshop - 1) /* ab@unido */
276 pline("Somehow you escaped the shop without paying!");
277 addupbill();
278 pline("You stole for a total worth of %ld zorkmids.",
279 total);
280 ESHK(shopkeeper)((struct eshk *)(&(shopkeeper->mextra[0])))->robbed += total;
281 setpaid();
282 if((rooms[ESHK(shopkeeper)((struct eshk *)(&(shopkeeper->mextra[0])))->shoproom].rtype == GENERAL15)
283 == (rn2(3) == 0))
284 ESHK(shopkeeper)((struct eshk *)(&(shopkeeper->mextra[0])))->following = 1;
285 }
286 shopkeeper = 0;
287 shlevel = 0;
288 }
289 u.uinshop = 0;
290 }
291
292 /* Did we just enter a zoo of some kind? */
293 if(roomno >= 0) {
294 int rt = rooms[roomno].rtype;
295 struct monst *mtmp;
296 if(rt == ZOO7) {
297 pline("Welcome to David's treasure zoo!");
298 } else
299 if(rt == SWAMP3) {
300 pline("It looks rather muddy down here.");
301 } else
302 if(rt == MORGUE6) {
303 if(midnight())
304 pline("Go away! Go away!");
305 else
306 pline("You get an uncanny feeling ...");
307 } else
308 rt = 0;
309 if(rt != 0) {
310 rooms[roomno].rtype = 0;
311 for(mtmp = fmon; mtmp; mtmp = mtmp->nmon)
312 if(rt != ZOO7 || !rn2(3))
313 mtmp->msleep = 0;
314 }
315 }
316
317 /* Did we just enter a shop? */
318 if(roomno >= 0 && rooms[roomno].rtype >= 8) {
319 if(shlevel != dlevel || !shopkeeper
320 || ESHK(shopkeeper)((struct eshk *)(&(shopkeeper->mextra[0])))->shoproom != roomno)
321 findshk(roomno);
322 if(!shopkeeper) {
323 rooms[roomno].rtype = 0;
324 u.uinshop = 0;
325 } else if(!u.uinshop){
326 if(!ESHK(shopkeeper)((struct eshk *)(&(shopkeeper->mextra[0])))->visitct ||
327 strncmp(ESHK(shopkeeper)((struct eshk *)(&(shopkeeper->mextra[0])))->customer, plname, PL_NSIZ32)){
328
329 /* He seems to be new here */
330 ESHK(shopkeeper)((struct eshk *)(&(shopkeeper->mextra[0])))->visitct = 0;
331 ESHK(shopkeeper)((struct eshk *)(&(shopkeeper->mextra[0])))->following = 0;
332 (void) strlcpy(ESHK(shopkeeper)((struct eshk *)(&(shopkeeper->mextra[0])))->customer,plname,PL_NSIZ32);
333 NOTANGRY(shopkeeper)shopkeeper->mpeaceful = 1;
334 }
335 if(!ESHK(shopkeeper)((struct eshk *)(&(shopkeeper->mextra[0])))->following) {
336 boolean box, pick;
337
338 pline("Hello %s! Welcome%s to %s's %s shop!",
339 plname,
340 ESHK(shopkeeper)((struct eshk *)(&(shopkeeper->mextra[0])))->visitct++ ? " again" : "",
341 shkname(shopkeeper),
342 shopnam[rooms[ESHK(shopkeeper)((struct eshk *)(&(shopkeeper->mextra[0])))->shoproom].rtype - 8] );
343 box = carrying(ICE_BOX92);
344 pick = carrying(PICK_AXE93);
345 if(box || pick) {
346 if(dochug(shopkeeper)) {
347 u.uinshop = 0; /* he died moving */
348 return(0);
349 }
350 pline("Will you please leave your %s outside?",
351 (box && pick) ? "box and pick-axe" :
352 box ? "box" : "pick-axe");
353 }
354 }
355 u.uinshop = roomno + 1;
356 }
357 }
358 return(u.uinshop);
359}
360
361static void
362findshk(int roomno)
363{
364 struct monst *mtmp;
365
366 for(mtmp = fmon; mtmp; mtmp = mtmp->nmon)
367 if(mtmp->isshk && ESHK(mtmp)((struct eshk *)(&(mtmp->mextra[0])))->shoproom == roomno
368 && ESHK(mtmp)((struct eshk *)(&(mtmp->mextra[0])))->shoplevel == dlevel) {
369 shopkeeper = mtmp;
370 bill = &(ESHK(shopkeeper)((struct eshk *)(&(shopkeeper->mextra[0])))->bill[0]);
371 shlevel = dlevel;
372 if(ANGRY(shopkeeper)!shopkeeper->mpeaceful &&
373 strncmp(ESHK(shopkeeper)((struct eshk *)(&(shopkeeper->mextra[0])))->customer,plname,PL_NSIZ32))
374 NOTANGRY(shopkeeper)shopkeeper->mpeaceful = 1;
375 /* billobjs = 0; -- this is wrong if we save in a shop */
376 /* (and it is harmless to have too many things in billobjs) */
377 return;
378 }
379 shopkeeper = 0;
380 shlevel = 0;
381 bill = (struct bill_x *) -1000; /* dump core when referenced */
382}
383
384static struct bill_x *
385onbill(struct obj *obj)
386{
387 struct bill_x *bp;
388
389 if(!shopkeeper) return(NULL((void *)0));
390 for(bp = bill; bp < &bill[ESHK(shopkeeper)((struct eshk *)(&(shopkeeper->mextra[0])))->billct]; bp++)
391 if(bp->bo_id == obj->o_id) {
392 if(!obj->unpaid) pline("onbill: paid obj on bill?");
393 return(bp);
394 }
395 if(obj->unpaid) pline("onbill: unpaid obj not on bill?");
396 return(NULL((void *)0));
397}
398
399/* called with two args on merge */
400void
401obfree(struct obj *obj, struct obj *merge)
402{
403 struct bill_x *bp = onbill(obj);
404 struct bill_x *bpm;
405
406 if(bp) {
407 if(!merge){
408 bp->useup = 1;
409 obj->unpaid = 0; /* only for doinvbill */
410 obj->nobj = billobjs;
411 billobjs = obj;
412 return;
413 }
414 bpm = onbill(merge);
415 if(!bpm){
416 /* this used to be a rename */
417 impossible("obfree: not on bill??");
418 return;
419 } else {
420 /* this was a merger */
421 bpm->bquan += bp->bquan;
422 ESHK(shopkeeper)((struct eshk *)(&(shopkeeper->mextra[0])))->billct--;
423 *bp = bill[ESHK(shopkeeper)((struct eshk *)(&(shopkeeper->mextra[0])))->billct];
424 }
425 }
426 free(obj);
427}
428
429static void
430pay(long tmp, struct monst *shkp)
431{
432 long robbed = ESHK(shkp)((struct eshk *)(&(shkp->mextra[0])))->robbed;
433
434 u.ugold -= tmp;
435 shkp->mgold += tmp;
436 flags.botl = 1;
437 if(robbed) {
438 robbed -= tmp;
439 if(robbed < 0) robbed = 0;
440 ESHK(shkp)((struct eshk *)(&(shkp->mextra[0])))->robbed = robbed;
441 }
442}
443
444int
445dopay(void)
446{
447 long ltmp;
448 struct bill_x *bp;
449 struct monst *shkp;
450 int pass, tmp;
451
452 multi = 0;
453 (void) inshop();
454 for(shkp = fmon; shkp; shkp = shkp->nmon)
455 if(shkp->isshk && dist(shkp->mx,shkp->my) < 3)
456 break;
457 if(!shkp && u.uinshop &&
458 inroom(shopkeeper->mx,shopkeeper->my) == ESHK(shopkeeper)((struct eshk *)(&(shopkeeper->mextra[0])))->shoproom)
459 shkp = shopkeeper;
460
461 if(!shkp) {
462 pline("There is nobody here to receive your payment.");
463 return(0);
464 }
465 ltmp = ESHK(shkp)((struct eshk *)(&(shkp->mextra[0])))->robbed;
466 if(shkp != shopkeeper && NOTANGRY(shkp)shkp->mpeaceful) {
467 if(!ltmp) {
468 pline("You do not owe %s anything.", monnam(shkp));
469 } else
470 if(!u.ugold) {
471 pline("You have no money.");
472 } else {
473 long ugold = u.ugold;
474
475 if(u.ugold > ltmp) {
476 pline("You give %s the %ld gold pieces he asked for.",
477 monnam(shkp), ltmp);
478 pay(ltmp, shkp);
479 } else {
480 pline("You give %s all your gold.", monnam(shkp));
481 pay(u.ugold, shkp);
482 }
483 if(ugold < ltmp/2) {
484 pline("Unfortunately, he doesn't look satisfied.");
485 } else {
486 ESHK(shkp)((struct eshk *)(&(shkp->mextra[0])))->robbed = 0;
487 ESHK(shkp)((struct eshk *)(&(shkp->mextra[0])))->following = 0;
488 if(ESHK(shkp)((struct eshk *)(&(shkp->mextra[0])))->shoplevel != dlevel) {
489 /* For convenience's sake, let him disappear */
490 shkp->minvent = 0; /* %% */
491 shkp->mgold = 0;
492 mondead(shkp);
493 }
494 }
495 }
496 return(1);
497 }
498
499 if(!ESHK(shkp)((struct eshk *)(&(shkp->mextra[0])))->billct){
500 pline("You do not owe %s anything.", monnam(shkp));
501 if(!u.ugold){
502 pline("Moreover, you have no money.");
503 return(1);
504 }
505 if(ESHK(shkp)((struct eshk *)(&(shkp->mextra[0])))->robbed){
506#define min(a,b)((a<b)?a:b) ((a<b)?a:b)
507 pline("But since his shop has been robbed recently,");
508 pline("you %srepay %s's expenses.",
509 (u.ugold < ESHK(shkp)((struct eshk *)(&(shkp->mextra[0])))->robbed) ? "partially " : "",
510 monnam(shkp));
511 pay(min(u.ugold, ESHK(shkp)->robbed)((u.ugold<((struct eshk *)(&(shkp->mextra[0])))->
robbed)?u.ugold:((struct eshk *)(&(shkp->mextra[0])))->
robbed), shkp);
512 ESHK(shkp)((struct eshk *)(&(shkp->mextra[0])))->robbed = 0;
513 return(1);
514 }
515 if(ANGRY(shkp)!shkp->mpeaceful){
516 pline("But in order to appease %s,",
517 amonnam(shkp, "angry"));
518 if(u.ugold >= 1000){
519 ltmp = 1000;
520 pline(" you give him 1000 gold pieces.");
521 } else {
522 ltmp = u.ugold;
523 pline(" you give him all your money.");
524 }
525 pay(ltmp, shkp);
526 if(strncmp(ESHK(shkp)((struct eshk *)(&(shkp->mextra[0])))->customer, plname, PL_NSIZ32)
527 || rn2(3)){
528 pline("%s calms down.", Monnam(shkp));
529 NOTANGRY(shkp)shkp->mpeaceful = 1;
530 } else pline("%s is as angry as ever.",
531 Monnam(shkp));
532 }
533 return(1);
534 }
535 if(shkp != shopkeeper) {
536 impossible("dopay: not to shopkeeper?");
537 if(shopkeeper) setpaid();
538 return(0);
539 }
540 for(pass = 0; pass <= 1; pass++) {
541 tmp = 0;
542 while(tmp < ESHK(shopkeeper)((struct eshk *)(&(shopkeeper->mextra[0])))->billct) {
543 bp = &bill[tmp];
544 if(!pass && !bp->useup) {
545 tmp++;
546 continue;
547 }
548 if(!dopayobj(bp)) return(1);
549 bill[tmp] = bill[--ESHK(shopkeeper)((struct eshk *)(&(shopkeeper->mextra[0])))->billct];
550 }
551 }
552 pline("Thank you for shopping in %s's %s store!",
553 shkname(shopkeeper),
554 shopnam[rooms[ESHK(shopkeeper)((struct eshk *)(&(shopkeeper->mextra[0])))->shoproom].rtype - 8]);
555 NOTANGRY(shopkeeper)shopkeeper->mpeaceful = 1;
556 return(1);
557}
558
559/* return 1 if paid successfully */
560/* 0 if not enough money */
561/* -1 if object could not be found (but was paid) */
562static int
563dopayobj(struct bill_x *bp)
564{
565 struct obj *obj;
566 long ltmp;
567
568 /* find the object on one of the lists */
569 obj = bp_to_obj(bp);
570
571 if(!obj) {
572 impossible("Shopkeeper administration out of order.");
573 setpaid(); /* be nice to the player */
574 return(0);
575 }
576
577 if(!obj->unpaid && !bp->useup){
578 impossible("Paid object on bill??");
579 return(1);
580 }
581 obj->unpaid = 0;
582 ltmp = bp->price * bp->bquan;
583 if(ANGRY(shopkeeper)!shopkeeper->mpeaceful) ltmp += ltmp/3;
584 if(u.ugold < ltmp){
585 pline("You don't have gold enough to pay %s.",
586 doname(obj));
587 obj->unpaid = 1;
588 return(0);
589 }
590 pay(ltmp, shopkeeper);
591 pline("You bought %s for %ld gold piece%s.",
592 doname(obj), ltmp, plur(ltmp)(((ltmp) == 1) ? "" : "s"));
593 if(bp->useup) {
594 struct obj *otmp = billobjs;
595 if(obj == billobjs)
596 billobjs = obj->nobj;
597 else {
598 while(otmp && otmp->nobj != obj) otmp = otmp->nobj;
599 if(otmp) otmp->nobj = obj->nobj;
600 else pline("Error in shopkeeper administration.");
601 }
602 free(obj);
603 }
604 return(1);
605}
606
607/* routine called after dying (or quitting) with nonempty bill */
608void
609paybill(void)
610{
611 if(shlevel == dlevel && shopkeeper && ESHK(shopkeeper)((struct eshk *)(&(shopkeeper->mextra[0])))->billct){
612 addupbill();
613 if(total > u.ugold){
614 shopkeeper->mgold += u.ugold;
615 u.ugold = 0;
616 pline("%s comes and takes all your possessions.",
617 Monnam(shopkeeper));
618 } else {
619 u.ugold -= total;
620 shopkeeper->mgold += total;
621 pline("%s comes and takes the %ld zorkmids you owed him.",
622 Monnam(shopkeeper), total);
623 }
624 setpaid(); /* in case we create bones */
625 }
626}
627
628/* find obj on one of the lists */
629static struct obj *
630bp_to_obj(struct bill_x *bp)
631{
632 struct obj *obj;
633 struct monst *mtmp;
634 unsigned id = bp->bo_id;
635
636 if(bp->useup)
637 obj = o_on(id, billobjs);
638 else if(!(obj = o_on(id, invent)) &&
639 !(obj = o_on(id, fobj)) &&
640 !(obj = o_on(id, fcobj))) {
641 for(mtmp = fmon; mtmp; mtmp = mtmp->nmon)
642 if ((obj = o_on(id, mtmp->minvent)))
643 break;
644 for(mtmp = fallen_down; mtmp; mtmp = mtmp->nmon)
645 if ((obj = o_on(id, mtmp->minvent)))
646 break;
647 }
648 return(obj);
649}
650
651/* called in hack.c when we pickup an object */
652void
653addtobill(struct obj *obj)
654{
655 struct bill_x *bp;
656
657 if(!inshop() ||
658 (u.ux == ESHK(shopkeeper)((struct eshk *)(&(shopkeeper->mextra[0])))->shk.x && u.uy == ESHK(shopkeeper)((struct eshk *)(&(shopkeeper->mextra[0])))->shk.y) ||
659 (u.ux == ESHK(shopkeeper)((struct eshk *)(&(shopkeeper->mextra[0])))->shd.x && u.uy == ESHK(shopkeeper)((struct eshk *)(&(shopkeeper->mextra[0])))->shd.y) ||
660 onbill(obj) /* perhaps we threw it away earlier */
661 ) return;
662 if(ESHK(shopkeeper)((struct eshk *)(&(shopkeeper->mextra[0])))->billct == BILLSZ200){
663 pline("You got that for free!");
664 return;
665 }
666 bp = &bill[ESHK(shopkeeper)((struct eshk *)(&(shopkeeper->mextra[0])))->billct];
667 bp->bo_id = obj->o_id;
668 bp->bquan = obj->quan;
669 bp->useup = 0;
670 bp->price = getprice(obj);
671 ESHK(shopkeeper)((struct eshk *)(&(shopkeeper->mextra[0])))->billct++;
672 obj->unpaid = 1;
673}
674
675void
676splitbill(struct obj *obj, struct obj *otmp)
677{
678 /* otmp has been split off from obj */
679struct bill_x *bp;
680int tmp;
681 bp = onbill(obj);
682 if(!bp) {
683 impossible("splitbill: not on bill?");
684 return;
685 }
686 if(bp->bquan < otmp->quan) {
687 impossible("Negative quantity on bill??");
688 }
689 if(bp->bquan == otmp->quan) {
690 impossible("Zero quantity on bill??");
691 }
692 bp->bquan -= otmp->quan;
693
694 /* addtobill(otmp); */
695 if(ESHK(shopkeeper)((struct eshk *)(&(shopkeeper->mextra[0])))->billct == BILLSZ200) otmp->unpaid = 0;
696 else {
697 tmp = bp->price;
698 bp = &bill[ESHK(shopkeeper)((struct eshk *)(&(shopkeeper->mextra[0])))->billct];
699 bp->bo_id = otmp->o_id;
700 bp->bquan = otmp->quan;
701 bp->useup = 0;
702 bp->price = tmp;
703 ESHK(shopkeeper)((struct eshk *)(&(shopkeeper->mextra[0])))->billct++;
704 }
705}
706
707void
708subfrombill(struct obj *obj)
709{
710 long ltmp;
711 int tmp;
712 struct obj *otmp;
713 struct bill_x *bp;
714
715 if(!inshop() || (u.ux == ESHK(shopkeeper)((struct eshk *)(&(shopkeeper->mextra[0])))->shk.x && u.uy == ESHK(shopkeeper)((struct eshk *)(&(shopkeeper->mextra[0])))->shk.y) ||
716 (u.ux == ESHK(shopkeeper)((struct eshk *)(&(shopkeeper->mextra[0])))->shd.x && u.uy == ESHK(shopkeeper)((struct eshk *)(&(shopkeeper->mextra[0])))->shd.y))
717 return;
718 if((bp = onbill(obj)) != 0){
719 obj->unpaid = 0;
720 if(bp->bquan > obj->quan){
721 otmp = newobj(0)(struct obj *) alloc((unsigned)(0) + sizeof(struct obj));
722 *otmp = *obj;
723 bp->bo_id = otmp->o_id = flags.ident++;
724 otmp->quan = (bp->bquan -= obj->quan);
725 otmp->owt = 0; /* superfluous */
726 otmp->onamelth = 0;
727 bp->useup = 1;
728 otmp->nobj = billobjs;
729 billobjs = otmp;
730 return;
731 }
732 ESHK(shopkeeper)((struct eshk *)(&(shopkeeper->mextra[0])))->billct--;
733 *bp = bill[ESHK(shopkeeper)((struct eshk *)(&(shopkeeper->mextra[0])))->billct];
734 return;
735 }
736 if(obj->unpaid){
737 pline("%s didn't notice.", Monnam(shopkeeper));
738 obj->unpaid = 0;
739 return; /* %% */
740 }
741 /* he dropped something of his own - probably wants to sell it */
742 if(shopkeeper->msleep || shopkeeper->mfroz ||
743 inroom(shopkeeper->mx,shopkeeper->my) != ESHK(shopkeeper)((struct eshk *)(&(shopkeeper->mextra[0])))->shoproom)
744 return;
745 if(ESHK(shopkeeper)((struct eshk *)(&(shopkeeper->mextra[0])))->billct == BILLSZ200 ||
746 ((tmp = shtypes[rooms[ESHK(shopkeeper)((struct eshk *)(&(shopkeeper->mextra[0])))->shoproom].rtype-8]) && tmp != obj->olet)
747 || strchr("_0", obj->olet)) {
748 pline("%s seems not interested.", Monnam(shopkeeper));
749 return;
750 }
751 ltmp = getprice(obj) * obj->quan;
752 if(ANGRY(shopkeeper)!shopkeeper->mpeaceful) {
753 ltmp /= 3;
754 NOTANGRY(shopkeeper)shopkeeper->mpeaceful = 1;
755 } else ltmp /= 2;
756 if(ESHK(shopkeeper)((struct eshk *)(&(shopkeeper->mextra[0])))->robbed){
757 if((ESHK(shopkeeper)((struct eshk *)(&(shopkeeper->mextra[0])))->robbed -= ltmp) < 0)
758 ESHK(shopkeeper)((struct eshk *)(&(shopkeeper->mextra[0])))->robbed = 0;
759pline("Thank you for your contribution to restock this recently plundered shop.");
760 return;
761 }
762 if(ltmp > shopkeeper->mgold)
763 ltmp = shopkeeper->mgold;
764 pay(-ltmp, shopkeeper);
765 if(!ltmp)
766 pline("%s gladly accepts %s but cannot pay you at present.",
767 Monnam(shopkeeper), doname(obj));
768 else
769 pline("You sold %s and got %ld gold piece%s.", doname(obj), ltmp,
770 plur(ltmp)(((ltmp) == 1) ? "" : "s"));
771}
772
773/* int mode; 0: deliver count 1: paged */
774int
775doinvbill(int mode)
776{
777 struct bill_x *bp;
778 struct obj *obj;
779 long totused, thisused;
780 char buf[BUFSZ256];
781
782 if(mode == 0) {
783 int cnt = 0;
784
785 if(shopkeeper)
786 for(bp = bill; bp - bill < ESHK(shopkeeper)((struct eshk *)(&(shopkeeper->mextra[0])))->billct; bp++)
787 if(bp->useup ||
788 ((obj = bp_to_obj(bp)) && obj->quan < bp->bquan))
789 cnt++;
790 return(cnt);
791 }
792
793 if(!shopkeeper) {
794 impossible("doinvbill: no shopkeeper?");
795 return(0);
796 }
797
798 set_pager(0);
799 if(page_line("Unpaid articles already used up:") || page_line(""))
800 goto quit;
801
802 totused = 0;
803 for(bp = bill; bp - bill < ESHK(shopkeeper)((struct eshk *)(&(shopkeeper->mextra[0])))->billct; bp++) {
804 obj = bp_to_obj(bp);
805 if(!obj) {
806 impossible("Bad shopkeeper administration.");
807 goto quit;
808 }
809 if(bp->useup || bp->bquan > obj->quan) {
810 int cnt, oquan, uquan;
811
812 oquan = obj->quan;
813 uquan = (bp->useup ? bp->bquan : bp->bquan - oquan);
814 thisused = bp->price * uquan;
815 totused += thisused;
816 obj->quan = uquan; /* cheat doname */
817 (void) snprintf(buf, sizeof buf, "x - %s", doname(obj));
818 obj->quan = oquan; /* restore value */
819 for(cnt = 0; buf[cnt]; cnt++);
820 while(cnt < 50)
821 buf[cnt++] = ' ';
822 (void) snprintf(&buf[cnt], sizeof buf - cnt,
823 " %5ld zorkmids", thisused);
824 if(page_line(buf))
825 goto quit;
826 }
827 }
828 (void) snprintf(buf, sizeof buf, "Total:%50ld zorkmids", totused);
829 if(page_line("") || page_line(buf))
830 goto quit;
831 set_pager(1);
832 return(0);
833quit:
834 set_pager(2);
835 return(0);
836}
837
838static int
839getprice(struct obj *obj)
840{
841 int tmp, ac;
842
843 switch(obj->olet){
844 case AMULET_SYM'"':
845 tmp = 10*rnd(500);
846 break;
847 case TOOL_SYM'(':
848 tmp = 10*rnd((obj->otyp == EXPENSIVE_CAMERA91) ? 150 : 30);
849 break;
850 case RING_SYM'=':
851 tmp = 10*rnd(100);
852 break;
853 case WAND_SYM'/':
854 tmp = 10*rnd(100);
855 break;
856 case SCROLL_SYM'?':
857 tmp = 10*rnd(50);
858#ifdef MAIL
859 if(obj->otyp == SCR_MAIL130)
860 tmp = rnd(5);
861#endif /* MAIL */
862 break;
863 case POTION_SYM'!':
864 tmp = 10*rnd(50);
865 break;
866 case FOOD_SYM'%':
867 tmp = 10*rnd(5 + (2000/realhunger()));
868 break;
869 case GEM_SYM'*':
870 tmp = 10*rnd(20);
871 break;
872 case ARMOR_SYM'[':
873 ac = ARM_BONUS(obj)((10 - objects[obj->otyp].oc_oc1) + obj->spe);
874 if(ac <= -10) /* probably impossible */
875 ac = -9;
876 tmp = 100 + ac*ac*rnd(10+ac);
877 break;
878 case WEAPON_SYM')':
879 if(obj->otyp < BOOMERANG76)
880 tmp = 5*rnd(10);
881 else if(obj->otyp == LONG_SWORD80 ||
882 obj->otyp == TWO_HANDED_SWORD81)
883 tmp = 10*rnd(150);
884 else tmp = 10*rnd(75);
885 break;
886 case CHAIN_SYM'_':
887 pline("Strange ..., carrying a chain?");
888 case BALL_SYM'0':
889 tmp = 10;
890 break;
891 default:
892 tmp = 10000;
893 }
894 return(tmp);
895}
896
897/* not completely foolproof */
898static int
899realhunger(void)
900{
901 int tmp = u.uhunger;
902 struct obj *otmp = invent;
903
904 while(otmp){
905 if(otmp->olet == FOOD_SYM'%' && !otmp->unpaid)
906 tmp += objects[otmp->otyp].nutritionoc_oi;
907 otmp = otmp->nobj;
908 }
909 return((tmp <= 0) ? 1 : tmp);
910}
911
912int
913shkcatch(struct obj *obj)
914{
915 struct monst *shkp = shopkeeper;
916
917 if(u.uinshop && shkp && !shkp->mfroz && !shkp->msleep &&
918 u.dx && u.dy &&
919 inroom(u.ux+u.dx, u.uy+u.dy) + 1 == u.uinshop &&
920 shkp->mx == ESHK(shkp)((struct eshk *)(&(shkp->mextra[0])))->shk.x && shkp->my == ESHK(shkp)((struct eshk *)(&(shkp->mextra[0])))->shk.y &&
921 u.ux == ESHK(shkp)((struct eshk *)(&(shkp->mextra[0])))->shd.x && u.uy == ESHK(shkp)((struct eshk *)(&(shkp->mextra[0])))->shd.y) {
922 pline("%s nimbly catches the %s.", Monnam(shkp), xname(obj));
923 obj->nobj = shkp->minvent;
924 shkp->minvent = obj;
925 return(1);
926 }
927 return(0);
928}
929
930/*
931 * shk_move: return 1: he moved 0: he didnt -1: let m_move do it
932 */
933int
934shk_move(struct monst *shkp)
935{
936 struct monst *mtmp;
937 struct permonst *mdat = shkp->data;
938 xchar gx,gy,omx,omy,nx,ny,nix,niy;
939 schar appr,i;
940 int udist;
941 int z;
942 schar shkroom,chi,chcnt,cnt;
943 boolean uondoor, satdoor, avoid, badinv;
1
'uondoor' declared without an initial value
→
944 coord poss[9];
945 int info[9];
946 struct obj *ib = 0;
947
948 omx = shkp->mx;
949 omy = shkp->my;
950
951 if((udist = dist(omx,omy)) < 3) {
2
←
Assuming the condition is false
→
3
←
Taking false branch
→
952 if(ANGRY(shkp)!shkp->mpeaceful) {
953 (void) hitu(shkp, d(mdat->damn, mdat->damd)+1);
954 return(0);
955 }
956 if(ESHK(shkp)((struct eshk *)(&(shkp->mextra[0])))->following) {
957 if(strncmp(ESHK(shkp)((struct eshk *)(&(shkp->mextra[0])))->customer, plname, PL_NSIZ32)){
958 pline("Hello %s! I was looking for %s.",
959 plname, ESHK(shkp)((struct eshk *)(&(shkp->mextra[0])))->customer);
960 ESHK(shkp)((struct eshk *)(&(shkp->mextra[0])))->following = 0;
961 return(0);
962 }
963 if(!ESHK(shkp)((struct eshk *)(&(shkp->mextra[0])))->robbed) { /* impossible? */
964 ESHK(shkp)((struct eshk *)(&(shkp->mextra[0])))->following = 0;
965 return(0);
966 }
967 if(moves > followmsg+4) {
968 pline("Hello %s! Didn't you forget to pay?",
969 plname);
970 followmsg = moves;
971 }
972 if(udist < 2)
973 return(0);
974 }
975 }
976
977 shkroom = inroom(omx,omy);
978 appr = 1;
979 gx = ESHK(shkp)((struct eshk *)(&(shkp->mextra[0])))->shk.x;
980 gy = ESHK(shkp)((struct eshk *)(&(shkp->mextra[0])))->shk.y;
981 satdoor = (gx == omx && gy == omy);
4
←
Assuming 'gx' is not equal to 'omx'
→
982 if(ESHK(shkp)((struct eshk *)(&(shkp->mextra[0])))->following || ((z = holetime()) >= 0 && z*z <= udist)){
5
←
Assuming field 'following' is 0
→
6
←
Assuming the condition is false
→
983 gx = u.ux;
984 gy = u.uy;
985 if(shkroom < 0 || shkroom != inroom(u.ux,u.uy))
986 if(udist > 4)
987 return(-1); /* leave it to m_move */
988 } else if(ANGRY(shkp)!shkp->mpeaceful) {
7
←
Assuming field 'mpeaceful' is not equal to 0
→
8
←
Taking false branch
→
989 long saveBlind = Blindu.uprops[(19 +7)].p_flgs;
990 Blindu.uprops[(19 +7)].p_flgs = 0;
991 if(shkp->mcansee && !Invisu.uprops[(19 +3)].p_flgs && cansee(omx,omy)) {
992 gx = u.ux;
993 gy = u.uy;
994 }
995 Blindu.uprops[(19 +7)].p_flgs = saveBlind;
996 avoid = FALSE0;
997 } else {
998#define GDIST(x,y)((x-gx)*(x-gx)+(y-gy)*(y-gy)) ((x-gx)*(x-gx)+(y-gy)*(y-gy))
999 if(Invisu.uprops[(19 +3)].p_flgs)
9
←
Assuming field 'p_flgs' is not equal to 0
→
10
←
Taking true branch
→
1000 avoid = FALSE0;
1001 else {
1002 uondoor = (u.ux == ESHK(shkp)((struct eshk *)(&(shkp->mextra[0])))->shd.x &&
1003 u.uy == ESHK(shkp)((struct eshk *)(&(shkp->mextra[0])))->shd.y);
1004 if(uondoor) {
1005 if(ESHK(shkp)((struct eshk *)(&(shkp->mextra[0])))->billct)
1006 pline("Hello %s! Will you please pay before leaving?",
1007 plname);
1008 badinv = (carrying(PICK_AXE93) || carrying(ICE_BOX92));
1009 if(satdoor && badinv)
1010 return(0);
1011 avoid = !badinv;
1012 } else {
1013 avoid = (u.uinshop && dist(gx,gy) > 8);
1014 badinv = FALSE0;
1015 }
1016
1017 if(((!ESHK(shkp)((struct eshk *)(&(shkp->mextra[0])))->robbed && !ESHK(shkp)((struct eshk *)(&(shkp->mextra[0])))->billct) || avoid)
1018 && GDIST(omx,omy)((omx-gx)*(omx-gx)+(omy-gy)*(omy-gy)) < 3){
1019 if(!badinv && !online(omx,omy))
1020 return(0);
1021 if(satdoor)
1022 appr = gx = gy = 0;
1023 }
1024 }
1025 }
1026 if(omx
10.1
'omx' is not equal to 'gx'
 == gx && omy == gy)
1027 return(0);
1028 if(shkp->mconf) {
11
←
Assuming field 'mconf' is 0
→
12
←
Taking false branch
→
1029 avoid = FALSE0;
1030 appr = 0;
1031 }
1032 nix = omx;
1033 niy = omy;
1034 cnt = mfndpos(shkp,poss,info,ALLOW_SSM010000);
1035 if(avoid
12.1
'avoid' is 0
 && uondoor) { /* perhaps we cannot avoid him */
1036 for(i=0; i<cnt; i++)
1037 if(!(info[(int)i] & NOTONL040000)) goto notonl_ok;
1038 avoid = FALSE0;
1039 notonl_ok:
1040 ;
1041 }
1042 chi = -1;
1043 chcnt = 0;
1044 for(i=0; i<cnt; i++){
13
←
Assuming 'i' is < 'cnt'
→
14
←
Loop condition is true. Entering loop body
→
1045 nx = poss[(int)i].x;
1046 ny = poss[(int)i].y;
1047 if(levl[(int)nx][(int)ny].typ == ROOM9
15
←
Assuming field 'typ' is equal to ROOM
→
1048 || shkroom != ESHK(shkp)((struct eshk *)(&(shkp->mextra[0])))->shoproom
1049 || ESHK(shkp)((struct eshk *)(&(shkp->mextra[0])))->following) {
1050#ifdef STUPID
1051 /* cater for stupid compilers */
1052 int zz;
1053#endif /* STUPID */
1054 if(uondoor && (ib = sobj_at(ICE_BOX92, nx, ny))) {
16
←
Branch condition evaluates to a garbage value
1055 nix = nx; niy = ny; chi = i; break;
1056 }
1057 if(avoid && (info[(int)i] & NOTONL040000))
1058 continue;
1059 if((!appr && !rn2(++chcnt)) ||
1060#ifdef STUPID
1061 (appr && (zz = GDIST(nix,niy)((nix-gx)*(nix-gx)+(niy-gy)*(niy-gy))) && zz > GDIST(nx,ny)((nx-gx)*(nx-gx)+(ny-gy)*(ny-gy)))
1062#else
1063 (appr && GDIST(nx,ny)((nx-gx)*(nx-gx)+(ny-gy)*(ny-gy)) < GDIST(nix,niy)((nix-gx)*(nix-gx)+(niy-gy)*(niy-gy)))
1064#endif /* STUPID */
1065 ) {
1066 nix = nx;
1067 niy = ny;
1068 chi = i;
1069 }
1070 }
1071 }
1072 if(nix != omx || niy != omy){
1073 if(info[(int)chi] & ALLOW_M02000){
1074 mtmp = m_at(nix,niy);
1075 if(hitmm(shkp,mtmp) == 1 && rn2(3) &&
1076 hitmm(mtmp,shkp) == 2) return(2);
1077 return(0);
1078 } else if(info[(int)chi] & ALLOW_U01000){
1079 (void) hitu(shkp, d(mdat->damn, mdat->damd)+1);
1080 return(0);
1081 }
1082 shkp->mx = nix;
1083 shkp->my = niy;
1084 pmon(shkp);
1085 if(ib) {
1086 freeobj(ib);
1087 mpickobj(shkp, ib);
1088 }
1089 return(1);
1090 }
1091 return(0);
1092}
1093
1094/* He is digging in the shop. */
1095void
1096shopdig(int fall)
1097{
1098 if(!fall) {
1099 if(u.utraptype == TT_PIT1)
1100 pline("\"Be careful, sir, or you might fall through the floor.\"");
1101 else
1102 pline("\"Please, do not damage the floor here.\"");
1103 } else if(dist(shopkeeper->mx, shopkeeper->my) < 3) {
1104 struct obj *obj, *obj2;
1105
1106 pline("%s grabs your backpack!", shkname(shopkeeper));
1107 for(obj = invent; obj; obj = obj2) {
1108 obj2 = obj->nobj;
1109 if(obj->owornmask) continue;
1110 freeinv(obj);
1111 obj->nobj = shopkeeper->minvent;
1112 shopkeeper->minvent = obj;
1113 if(obj->unpaid)
1114 subfrombill(obj);
1115 }
1116 }
1117}
1118#endif /* QUEST */
1119
1120int
1121online(int x, int y)
1122{
1123 return(x==u.ux || y==u.uy ||
1124 (x-u.ux)*(x-u.ux) == (y-u.uy)*(y-u.uy));
1125}
1126
1127/* Does this monster follow me downstairs? */
1128int
1129follower(struct monst *mtmp)
1130{
1131 return( mtmp->mtame || strchr("1TVWZi&, ", mtmp->data->mlet)
1132#ifndef QUEST
1133 || (mtmp->isshk && ESHK(mtmp)((struct eshk *)(&(mtmp->mextra[0])))->following)
1134#endif /* QUEST */
1135 );
1136}