Bug Summary

File:src/games/hack/hack.zap.c
Warning:line 664, column 2
Undefined or garbage value returned to caller

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.zap.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.zap.c
1/* $OpenBSD: hack.zap.c,v 1.11 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 <stdlib.h>
65
66#include "hack.h"
67
68extern struct monst youmonst;
69
70char *fl[]= {
71 "magic missile",
72 "bolt of fire",
73 "sleep ray",
74 "bolt of cold",
75 "death ray"
76};
77
78static char dirlet(int, int);
79static int zhit(struct monst *, int);
80static boolean revive(struct obj *);
81static void rloco(struct obj *);
82static void burn_scrolls(void);
83
84/* Routines for IMMEDIATE wands. */
85/* bhitm: monster mtmp was hit by the effect of wand otmp */
86void
87bhitm(struct monst *mtmp, struct obj *otmp)
88{
89 wakeup(mtmp);
90 switch(otmp->otyp) {
91 case WAN_STRIKING159:
92 if(u.uswallow || rnd(20) < 10+mtmp->data->ac) {
93 int tmp = d(2,12);
94 hit("wand", mtmp, exclam(tmp));
95 mtmp->mhp -= tmp;
96 if(mtmp->mhp < 1) killed(mtmp);
97 } else miss("wand", mtmp);
98 break;
99 case WAN_SLOW_MONSTER160:
100 mtmp->mspeed = MSLOW1;
101 break;
102 case WAN_SPEED_MONSTER161:
103 mtmp->mspeed = MFAST2;
104 break;
105 case WAN_UNDEAD_TURNING162:
106 if(strchr(UNDEAD"ZVW ",mtmp->data->mlet)) {
107 mtmp->mhp -= rnd(8);
108 if(mtmp->mhp < 1) killed(mtmp);
109 else mtmp->mflee = 1;
110 }
111 break;
112 case WAN_POLYMORPH163:
113 if( newcham(mtmp,&mons[rn2(CMNUM55)]) )
114 objects[otmp->otyp].oc_name_known = 1;
115 break;
116 case WAN_CANCELLATION164:
117 mtmp->mcan = 1;
118 break;
119 case WAN_TELEPORTATION165:
120 rloc(mtmp);
121 break;
122 case WAN_MAKE_INVISIBLE166:
123 mtmp->minvis = 1;
124 break;
125#ifdef WAN_PROBING
126 case WAN_PROBING:
127 mstatusline(mtmp);
128 break;
129#endif /* WAN_PROBING */
130 default:
131 impossible("What an interesting wand (%u)", otmp->otyp);
132 }
133}
134
135/* returns TRUE if sth was done */
136/* object obj was hit by the effect of wand otmp */
137boolean
138bhito(struct obj *obj, struct obj *otmp)
139{
140 int res = TRUE1;
141
142 if(obj == uball || obj == uchain)
18
Assuming 'obj' is not equal to 'uball'
19
Assuming 'obj' is not equal to 'uchain'
20
Taking false branch
143 res = FALSE0;
144 else
145 switch(otmp->otyp) {
21
Control jumps to 'case 162:' at line 171
146 case WAN_POLYMORPH163:
147 /* preserve symbol and quantity, but turn rocks into gems */
148 mkobj_at((obj->otyp == ROCK75 || obj->otyp == ENORMOUS_ROCK97)
149 ? GEM_SYM'*' : obj->olet,
150 obj->ox, obj->oy) -> quan = obj->quan;
151 delobj(obj);
152 break;
153 case WAN_STRIKING159:
154 if(obj->otyp == ENORMOUS_ROCK97)
155 fracture_rock(obj);
156 else
157 res = FALSE0;
158 break;
159 case WAN_CANCELLATION164:
160 if(obj->spe && obj->olet != AMULET_SYM'"') {
161 obj->known = 0;
162 obj->spe = 0;
163 }
164 break;
165 case WAN_TELEPORTATION165:
166 rloco(obj);
167 break;
168 case WAN_MAKE_INVISIBLE166:
169 obj->oinvis = 1;
170 break;
171 case WAN_UNDEAD_TURNING162:
172 res = revive(obj);
22
Calling 'revive'
173 break;
174 case WAN_SLOW_MONSTER160: /* no effect on objects */
175 case WAN_SPEED_MONSTER161:
176#ifdef WAN_PROBING
177 case WAN_PROBING:
178#endif /* WAN_PROBING */
179 res = FALSE0;
180 break;
181 default:
182 impossible("What an interesting wand (%u)", otmp->otyp);
183 }
184 return(res);
185}
186
187int
188dozap(void)
189{
190 struct obj *obj;
191 xchar zx,zy;
192
193 obj = getobj("/", "zap");
194 if(!obj) return(0);
1
Assuming 'obj' is non-null
2
Taking false branch
195 if(obj->spe < 0 || (obj->spe == 0 && rn2(121))) {
3
Assuming field 'spe' is >= 0
4
Assuming field 'spe' is not equal to 0
196 pline("Nothing Happens.");
197 return(1);
198 }
199 if(obj->spe
4.1
Field 'spe' is not equal to 0
== 0)
5
Taking false branch
200 pline("You wrest one more spell from the worn-out wand.");
201 if(!(objects[obj->otyp].bitsoc_oc1 & NODIR1) && !getdir(1))
6
Assuming the condition is false
202 return(1); /* make him pay for knowing !NODIR */
203 obj->spe--;
204 if(objects[obj->otyp].bitsoc_oc1 & IMMEDIATE2) {
7
Assuming the condition is true
8
Taking true branch
205 if(u.uswallow)
9
Assuming field 'uswallow' is 0
10
Taking false branch
206 bhitm(u.ustuck, obj);
207 else if(u.dz) {
11
Assuming field 'dz' is not equal to 0
12
Taking true branch
208 if(u.dz > 0) {
13
Assuming field 'dz' is > 0
14
Taking true branch
209 struct obj *otmp = o_at(u.ux, u.uy);
210 if(otmp)
15
Assuming 'otmp' is non-null
16
Taking true branch
211 (void) bhito(otmp, obj);
17
Calling 'bhito'
212 }
213 } else
214 (void) bhit(u.dx,u.dy,rn1(8,6),0,bhitm,bhito,obj);
215 } else {
216 switch(obj->otyp){
217 case WAN_LIGHT155:
218 litroom(TRUE1);
219 break;
220 case WAN_SECRET_DOOR_DETECTION156:
221 if(!findit()) return(1);
222 break;
223 case WAN_CREATE_MONSTER157:
224 { int cnt = 1;
225 if(!rn2(23)) cnt += rn2(7) + 1;
226 while(cnt--)
227 (void) makemon((struct permonst *) 0, u.ux, u.uy);
228 }
229 break;
230 case WAN_WISHING158:
231 { char buf[BUFSZ256];
232 struct obj *otmp;
233 if(u.uluck + rn2(5) < 0) {
234 pline("Unfortunately, nothing happens.");
235 break;
236 }
237 pline("You may wish for an object. What do you want? ");
238 getlin(buf);
239 if(buf[0] == '\033') buf[0] = 0;
240 otmp = readobjnam(buf, sizeof buf);
241 otmp = addinv(otmp);
242 prinv(otmp);
243 break;
244 }
245 case WAN_DIGGING167:
246 /* Original effect (approximately):
247 * from CORR: dig until we pierce a wall
248 * from ROOM: piece wall and dig until we reach
249 * an ACCESSIBLE place.
250 * Currently: dig for digdepth positions;
251 * also down on request of Lennart Augustsson.
252 */
253 { struct rm *room;
254 int digdepth;
255 if(u.uswallow) {
256 struct monst *mtmp = u.ustuck;
257
258 pline("You pierce %s's stomach wall!",
259 monnam(mtmp));
260 mtmp->mhp = 1; /* almost dead */
261 unstuck(mtmp);
262 mnexto(mtmp);
263 break;
264 }
265 if(u.dz) {
266 if(u.dz < 0) {
267 pline("You loosen a rock from the ceiling.");
268 pline("It falls on your head!");
269 losehp(1, "falling rock");
270 mksobj_at(ROCK75, u.ux, u.uy);
271 fobj->quan = 1;
272 stackobj(fobj);
273 if(Invisible(u.uprops[(19 +3)].p_flgs && !u.uprops[4].p_flgs)) newsym(u.ux, u.uy);
274 } else {
275 dighole();
276 }
277 break;
278 }
279 zx = u.ux+u.dx;
280 zy = u.uy+u.dy;
281 digdepth = 8 + rn2(18);
282 Tmp_at(-1, '*'); /* open call */
283 while(--digdepth >= 0) {
284 if(!isok(zx,zy)) break;
285 room = &levl[(int)zx][(int)zy];
286 Tmp_at(zx,zy);
287 if(!xdnstair){
288 if(zx < 3 || zx > COLNO80-3 ||
289 zy < 3 || zy > ROWNO22-3)
290 break;
291 if(room->typ == HWALL1 ||
292 room->typ == VWALL2){
293 room->typ = ROOM9;
294 break;
295 }
296 } else
297 if(room->typ == HWALL1 || room->typ == VWALL2 ||
298 room->typ == SDOOR3 || room->typ == LDOOR5){
299 room->typ = DOOR7;
300 digdepth -= 2;
301 } else
302 if(room->typ == SCORR4 || !room->typ) {
303 room->typ = CORR8;
304 digdepth--;
305 }
306 mnewsym(zx,zy);
307 zx += u.dx;
308 zy += u.dy;
309 }
310 mnewsym(zx,zy); /* not always necessary */
311 Tmp_at(-1,-1); /* closing call */
312 break;
313 }
314 default:
315 buzz((int) obj->otyp - WAN_MAGIC_MISSILE168,
316 u.ux, u.uy, u.dx, u.dy);
317 break;
318 }
319 if(!objects[obj->otyp].oc_name_known) {
320 objects[obj->otyp].oc_name_known = 1;
321 more_experienced(0,10);
322 }
323 }
324 return(1);
325}
326
327char *
328exclam(int force)
329{
330 /* force == 0 occurs e.g. with sleep ray */
331 /* note that large force is usual with wands so that !! would
332 * require information about hand/weapon/wand
333 */
334 return( (force < 0) ? "?" : (force <= 4) ? "." : "!" );
335}
336
337/* force is usually either "." or "!" */
338void
339hit(char *str, struct monst *mtmp, char *force)
340{
341 if(!cansee(mtmp->mx,mtmp->my)) pline("The %s hits it.", str);
342 else pline("The %s hits %s%s", str, monnam(mtmp), force);
343}
344
345void
346miss(char *str, struct monst *mtmp)
347{
348 if(!cansee(mtmp->mx,mtmp->my)) pline("The %s misses it.",str);
349 else pline("The %s misses %s.",str,monnam(mtmp));
350}
351
352/* bhit: called when a weapon is thrown (sym = obj->olet) or when an
353 * IMMEDIATE wand is zapped (sym = 0); the weapon falls down at end of
354 * range or when a monster is hit; the monster is returned, and bhitpos
355 * is set to the final position of the weapon thrown; the ray of a wand
356 * may affect several objects and monsters on its path - for each of
357 * these an argument function is called. */
358/* check !u.uswallow before calling bhit() */
359
360/*
361 * int ddx,ddy,range; direction and range
362 * char sym; symbol displayed on path
363 * int (*fhitm)(), (*fhito)(); fns called when mon/obj hit
364 * struct obj *obj; 2nd arg to fhitm/fhito
365 * struct monst *
366 */
367struct monst *
368bhit(int ddx, int ddy, int range, char sym,
369 void (*fhitm)(struct monst *, struct obj *),
370 boolean (*fhito)(struct obj *, struct obj *),
371 struct obj *obj)
372{
373 struct monst *mtmp;
374 struct obj *otmp;
375 int typ;
376
377 bhitpos.x = u.ux;
378 bhitpos.y = u.uy;
379
380 if(sym) tmp_at(-1, sym); /* open call */
381 while(range-- > 0) {
382 bhitpos.x += ddx;
383 bhitpos.y += ddy;
384 typ = levl[(int)bhitpos.x][(int)bhitpos.y].typ;
385 if ((mtmp = m_at(bhitpos.x,bhitpos.y))) {
386 if(sym) {
387 tmp_at(-1, -1); /* close call */
388 return(mtmp);
389 }
390 if (fhitm)
391 (*fhitm)(mtmp, obj);
392 range -= 3;
393 }
394 if ((otmp = o_at(bhitpos.x,bhitpos.y))){
395 if(fhito && (*fhito)(otmp, obj))
396 range--;
397 }
398 if (!ZAP_POS(typ)((typ) > 7)) {
399 bhitpos.x -= ddx;
400 bhitpos.y -= ddy;
401 break;
402 }
403 if(sym) tmp_at(bhitpos.x, bhitpos.y);
404 }
405
406 /* leave last symbol unless in a pool */
407 if(sym)
408 tmp_at(-1, (levl[(int)bhitpos.x][(int)bhitpos.y].typ == POOL6) ? -1 : 0);
409 return(NULL((void *)0));
410}
411
412struct monst *
413boomhit(int dx, int dy)
414{
415 int i, ct;
416 struct monst *mtmp;
417 char sym = ')';
418 extern schar xdir[], ydir[];
419
420 bhitpos.x = u.ux;
421 bhitpos.y = u.uy;
422
423 for(i=0; i<8; i++) if(xdir[i] == dx && ydir[i] == dy) break;
424 tmp_at(-1, sym); /* open call */
425 for(ct=0; ct<10; ct++) {
426 if(i == 8) i = 0;
427 sym = ')' + '(' - sym;
428 tmp_at(-2, sym); /* change let call */
429 dx = xdir[i];
430 dy = ydir[i];
431 bhitpos.x += dx;
432 bhitpos.y += dy;
433 if ((mtmp = m_at(bhitpos.x, bhitpos.y))) {
434 tmp_at(-1,-1);
435 return(mtmp);
436 }
437 if (!ZAP_POS(levl[(int)bhitpos.x][(int)bhitpos.y].typ)((levl[(int)bhitpos.x][(int)bhitpos.y].typ) > 7)) {
438 bhitpos.x -= dx;
439 bhitpos.y -= dy;
440 break;
441 }
442 if (bhitpos.x == u.ux && bhitpos.y == u.uy) { /* ct == 9 */
443 if(rn2(20) >= 10+u.ulevel){ /* we hit ourselves */
444 (void) thitu(10, rnd(10), "boomerang");
445 break;
446 } else { /* we catch it */
447 tmp_at(-1,-1);
448 pline("Skillfully, you catch the boomerang.");
449 return(&youmonst);
450 }
451 }
452 tmp_at(bhitpos.x, bhitpos.y);
453 if(ct % 5 != 0) i++;
454 }
455 tmp_at(-1, -1); /* do not leave last symbol */
456 return(0);
457}
458
459static char
460dirlet(int dx, int dy)
461{
462 return (dx == dy) ? '\\' : (dx && dy) ? '/' : dx ? '-' : '|';
463}
464
465/* type == -1: monster spitting fire at you */
466/* type == -1,-2,-3: bolts sent out by wizard */
467/* called with dx = dy = 0 with vertical bolts */
468void
469buzz(int type, xchar sx, xchar sy, int dx, int dy)
470{
471 int abstype = abs(type);
472 char *fltxt = (type == -1) ? "blaze of fire" : fl[abstype];
473 struct rm *lev;
474 xchar range;
475 struct monst *mon;
476
477 if(u.uswallow) {
478 int tmp;
479
480 if(type < 0) return;
481 tmp = zhit(u.ustuck, type);
482 pline("The %s rips into %s%s",
483 fltxt, monnam(u.ustuck), exclam(tmp));
484 return;
485 }
486 if(type < 0) pru();
487 range = rn1(7,7);
488 Tmp_at(-1, dirlet(dx,dy)); /* open call */
489 while(range-- > 0) {
490 sx += dx;
491 sy += dy;
492 if ((lev = &levl[(int)sx][(int)sy])->typ)
493 Tmp_at(sx,sy);
494 else {
495 int bounce = 0;
496 if (cansee(sx-dx,sy-dy))
497 pline("The %s bounces!", fltxt);
498 if (ZAP_POS(levl[(int)sx][sy-dy].typ)((levl[(int)sx][sy-dy].typ) > 7))
499 bounce = 1;
500 if (ZAP_POS(levl[sx-dx][(int)sy].typ)((levl[sx-dx][(int)sy].typ) > 7)) {
501 if(!bounce || rn2(2))
502 bounce = 2;
503 }
504 switch(bounce){
505 case 0:
506 dx = -dx;
507 dy = -dy;
508 continue;
509 case 1:
510 dy = -dy;
511 sx -= dx;
512 break;
513 case 2:
514 dx = -dx;
515 sy -= dy;
516 break;
517 }
518 Tmp_at(-2,dirlet(dx,dy));
519 continue;
520 }
521 if(lev->typ == POOL6 && abstype == 1 /* fire */) {
522 range -= 3;
523 lev->typ = ROOM9;
524 if(cansee(sx,sy)) {
525 mnewsym(sx,sy);
526 pline("The water evaporates.");
527 } else
528 pline("You hear a hissing sound.");
529 }
530 if((mon = m_at(sx,sy)) &&
531 (type != -1 || mon->data->mlet != 'D')) {
532 wakeup(mon);
533 if(rnd(20) < 18 + mon->data->ac) {
534 int tmp = zhit(mon,abstype);
535 if(mon->mhp < 1) {
536 if(type < 0) {
537 if(cansee(mon->mx,mon->my))
538 pline("%s is killed by the %s!",
539 Monnam(mon), fltxt);
540 mondied(mon);
541 } else
542 killed(mon);
543 } else
544 hit(fltxt, mon, exclam(tmp));
545 range -= 2;
546 } else
547 miss(fltxt,mon);
548 } else if(sx == u.ux && sy == u.uy) {
549 nomul(0);
550 if(rnd(20) < 18+u.uac) {
551 int dam = 0;
552 range -= 2;
553 pline("The %s hits you!",fltxt);
554 switch(abstype) {
555 case 0:
556 dam = d(2,6);
557 break;
558 case 1:
559 if(Fire_resistanceu.uprops[10].p_flgs)
560 pline("You don't feel hot!");
561 else dam = d(6,6);
562 if(!rn2(3))
563 burn_scrolls();
564 break;
565 case 2:
566 nomul(-rnd(25)); /* sleep ray */
567 break;
568 case 3:
569 if(Cold_resistanceu.uprops[11].p_flgs)
570 pline("You don't feel cold!");
571 else dam = d(6,6);
572 break;
573 case 4:
574 u.uhp = -1;
575 }
576 losehp(dam,fltxt);
577 } else pline("The %s whizzes by you!",fltxt);
578 stop_occupation();
579 }
580 if(!ZAP_POS(lev->typ)((lev->typ) > 7)) {
581 int bounce = 0, rmn;
582 if(cansee(sx,sy)) pline("The %s bounces!",fltxt);
583 range--;
584 if(!dx || !dy || !rn2(20)){
585 dx = -dx;
586 dy = -dy;
587 } else {
588 if(ZAP_POS(rmn = levl[(int)sx][sy-dy].typ)((rmn = levl[(int)sx][sy-dy].typ) > 7) &&
589 (IS_ROOM(rmn)((rmn) >= 9) || ZAP_POS(levl[sx+dx][sy-dy].typ)((levl[sx+dx][sy-dy].typ) > 7)))
590 bounce = 1;
591 if(ZAP_POS(rmn = levl[sx-dx][(int)sy].typ)((rmn = levl[sx-dx][(int)sy].typ) > 7) &&
592 (IS_ROOM(rmn)((rmn) >= 9) || ZAP_POS(levl[sx-dx][sy+dy].typ)((levl[sx-dx][sy+dy].typ) > 7)))
593 if(!bounce || rn2(2))
594 bounce = 2;
595
596 switch(bounce){
597 case 0:
598 dy = -dy;
599 dx = -dx;
600 break;
601 case 1:
602 dy = -dy;
603 break;
604 case 2:
605 dx = -dx;
606 break;
607 }
608 Tmp_at(-2, dirlet(dx,dy));
609 }
610 }
611 }
612 Tmp_at(-1,-1);
613}
614
615/* returns damage to mon */
616static int
617zhit(struct monst *mon, int type)
618{
619 int tmp = 0;
620
621 switch(type) {
622 case 0: /* magic missile */
623 tmp = d(2,6);
624 break;
625 case -1: /* Dragon blazing fire */
626 case 1: /* fire */
627 if(strchr("Dg", mon->data->mlet)) break;
628 tmp = d(6,6);
629 if(strchr("YF", mon->data->mlet)) tmp += 7;
630 break;
631 case 2: /* sleep*/
632 mon->mfroz = 1;
633 break;
634 case 3: /* cold */
635 if(strchr("YFgf", mon->data->mlet)) break;
636 tmp = d(6,6);
637 if(mon->data->mlet == 'D') tmp += 7;
638 break;
639 case 4: /* death*/
640 if(strchr(UNDEAD"ZVW ", mon->data->mlet)) break;
641 tmp = mon->mhp+1;
642 break;
643 }
644 mon->mhp -= tmp;
645 return(tmp);
646}
647
648#define CORPSE_I_TO_C(otyp)(char) ((otyp >= 45) ? 'a' + (otyp - 45) : '@' + (otyp - 18
))
(char) ((otyp >= DEAD_ACID_BLOB45)\
649 ? 'a' + (otyp - DEAD_ACID_BLOB45)\
650 : '@' + (otyp - DEAD_HUMAN18))
651
652static boolean
653revive(struct obj *obj)
654{
655 struct monst *mtmp;
23
'mtmp' declared without an initial value
656
657 if(obj->olet == FOOD_SYM'%' && obj->otyp > CORPSE18) {
24
Assuming the condition is false
658 /* do not (yet) revive shopkeepers */
659 /* Note: this might conceivably produce two monsters
660 at the same position - strange, but harmless */
661 mtmp = mkmon_at(CORPSE_I_TO_C(obj->otyp)(char) ((obj->otyp >= 45) ? 'a' + (obj->otyp - 45) :
'@' + (obj->otyp - 18))
,obj->ox,obj->oy);
662 delobj(obj);
663 }
664 return(!!mtmp); /* TRUE if some monster created */
25
Undefined or garbage value returned to caller
665}
666
667static void
668rloco(struct obj *obj)
669{
670 int tx,ty,otx,oty;
671
672 otx = obj->ox;
673 oty = obj->oy;
674 do {
675 tx = rn1(COLNO80-3,2);
676 ty = rn2(ROWNO22);
677 } while(!goodpos(tx,ty));
678 obj->ox = tx;
679 obj->oy = ty;
680 if(cansee(otx,oty))
681 newsym(otx,oty);
682}
683
684/* fractured by pick-axe or wand of striking */
685void
686fracture_rock(struct obj *obj)
687{
688 /* unpobj(obj); */
689 obj->otyp = ROCK75;
690 obj->quan = 7 + rn2(60);
691 obj->owt = weight(obj);
692 obj->olet = WEAPON_SYM')';
693 if(cansee(obj->ox,obj->oy))
694 prl(obj->ox,obj->oy);
695}
696
697static void
698burn_scrolls(void)
699{
700 struct obj *obj, *obj2;
701 int cnt = 0;
702
703 for(obj = invent; obj; obj = obj2) {
704 obj2 = obj->nobj;
705 if(obj->olet == SCROLL_SYM'?') {
706 cnt++;
707 useup(obj);
708 }
709 }
710 if(cnt > 1) {
711 pline("Your scrolls catch fire!");
712 losehp(cnt, "burning scrolls");
713 } else if(cnt) {
714 pline("Your scroll catches fire!");
715 losehp(1, "burning scroll");
716 }
717}