games/hack/hack.zap.c

   1 /* Copyright (c) Stichting Mathematisch Centrum, Amsterdam, 1985. */
   2 /* hack.zap.c - version 1.0.3 */
   3 /* $FreeBSD: src/games/hack/hack.zap.c,v 1.4 1999/11/16 10:26:38 marcel Exp $ */
   4 /* $DragonFly: src/games/hack/hack.zap.c,v 1.5 2006/08/21 19:45:32 pavalos Exp $ */
   5
   6 #include "hack.h"
   7
   8 extern struct monst youmonst;
   9
  10 static const char *fl[]= {
  11         "magic missile",
  12         "bolt of fire",
  13         "sleep ray",
  14         "bolt of cold",
  15         "death ray"
  16 };
  17
  18 static void bhitm(struct monst *, struct obj *);
  19 static bool bhito(struct obj *, struct obj *);
  20 static char dirlet(int, int);
  21 static int zhit(struct monst *, int);
  22 static bool revive(struct obj *);
  23 static void rloco(struct obj *);
  24 static void burn_scrolls(void);
  25
  26 /* Routines for IMMEDIATE wands. */
  27 /* bhitm: monster mtmp was hit by the effect of wand otmp */
  28 static void
  29 bhitm(struct monst *mtmp, struct obj *otmp)
  30 {
  31         wakeup(mtmp);
  32         switch (otmp->otyp) {
  33         case WAN_STRIKING:
  34                 if (u.uswallow || rnd(20) < 10 + mtmp->data->ac) {
  35                         int tmp = d(2, 12);
  36                         hit("wand", mtmp, exclam(tmp));
  37                         mtmp->mhp -= tmp;
  38                         if (mtmp->mhp < 1)
  39                                 killed(mtmp);
  40                 } else
  41                         miss("wand", mtmp);
  42                 break;
  43         case WAN_SLOW_MONSTER:
  44                 mtmp->mspeed = MSLOW;
  45                 break;
  46         case WAN_SPEED_MONSTER:
  47                 mtmp->mspeed = MFAST;
  48                 break;
  49         case WAN_UNDEAD_TURNING:
  50                 if (strchr(UNDEAD, mtmp->data->mlet)) {
  51                         mtmp->mhp -= rnd(8);
  52                         if (mtmp->mhp < 1)
  53                                 killed(mtmp);
  54                         else
  55                                 mtmp->mflee = 1;
  56                 }
  57                 break;
  58         case WAN_POLYMORPH:
  59                 if (newcham(mtmp, &mons[rn2(CMNUM)]))
  60                         objects[otmp->otyp].oc_name_known = 1;
  61                 break;
  62         case WAN_CANCELLATION:
  63                 mtmp->mcan = 1;
  64                 break;
  65         case WAN_TELEPORTATION:
  66                 rloc(mtmp);
  67                 break;
  68         case WAN_MAKE_INVISIBLE:
  69                 mtmp->minvis = 1;
  70                 break;
  71 #ifdef WAN_PROBING
  72         case WAN_PROBING:
  73                 mstatusline(mtmp);
  74                 break;
  75 #endif /* WAN_PROBING */
  76         default:
  77                 impossible("What an interesting wand (%u)", otmp->otyp);
  78         }
  79 }
  80
  81 /*
  82  * object obj was hit by the effect of wand otmp
  83  * returns TRUE if sth was done
  84  */
  85 static bool
  86 bhito(struct obj *obj, struct obj *otmp)
  87 {
  88         int res = TRUE;
  89
  90         if (obj == uball || obj == uchain)
  91                 res = FALSE;
  92         else
  93                 switch (otmp->otyp) {
  94                 case WAN_POLYMORPH:
  95                         /* preserve symbol and quantity, but turn rocks into gems */
  96                         mkobj_at((obj->otyp == ROCK || obj->otyp == ENORMOUS_ROCK)
  97                                  ? GEM_SYM : obj->olet,
  98                                  obj->ox, obj->oy)->quan = obj->quan;
  99                         delobj(obj);
 100                         break;
 101                 case WAN_STRIKING:
 102                         if (obj->otyp == ENORMOUS_ROCK)
 103                                 fracture_rock(obj);
 104                         else
 105                                 res = FALSE;
 106                         break;
 107                 case WAN_CANCELLATION:
 108                         if (obj->spe && obj->olet != AMULET_SYM) {
 109                                 obj->known = 0;
 110                                 obj->spe = 0;
 111                         }
 112                         break;
 113                 case WAN_TELEPORTATION:
 114                         rloco(obj);
 115                         break;
 116                 case WAN_MAKE_INVISIBLE:
 117                         obj->oinvis = 1;
 118                         break;
 119                 case WAN_UNDEAD_TURNING:
 120                         res = revive(obj);
 121                         break;
 122                 case WAN_SLOW_MONSTER:  /* no effect on objects */
 123                 case WAN_SPEED_MONSTER:
 124 #ifdef WAN_PROBING
 125                 case WAN_PROBING:
 126 #endif /* WAN_PROBING */
 127                         res = FALSE;
 128                         break;
 129                 default:
 130                         impossible("What an interesting wand (%u)", otmp->otyp);
 131                 }
 132         return (res);
 133 }
 134
 135 int
 136 dozap(void)
 137 {
 138         struct obj *obj;
 139         xchar zx, zy;
 140
 141         obj = getobj("/", "zap");
 142         if (!obj)
 143                 return (0);
 144         if (obj->spe < 0 || (obj->spe == 0 && rn2(121))) {
 145                 pline("Nothing Happens.");
 146                 return (1);
 147         }
 148         if (obj->spe == 0)
 149                 pline("You wrest one more spell from the worn-out wand.");
 150         if (!(objects[obj->otyp].bits & NODIR) && !getdir(1))
 151                 return (1);     /* make him pay for knowing !NODIR */
 152         obj->spe--;
 153         if (objects[obj->otyp].bits & IMMEDIATE) {
 154                 if (u.uswallow)
 155                         bhitm(u.ustuck, obj);
 156                 else if (u.dz) {
 157                         if (u.dz > 0) {
 158                                 struct obj *otmp = o_at(u.ux, u.uy);
 159                                 if (otmp)
 160                                         bhito(otmp, obj);
 161                         }
 162                 } else
 163                         bhit(u.dx, u.dy, rn1(8, 6), 0, bhitm, bhito, obj);
 164         } else {
 165                 switch (obj->otyp) {
 166                 case WAN_LIGHT:
 167                         litroom(TRUE);
 168                         break;
 169                 case WAN_SECRET_DOOR_DETECTION:
 170                         if (!findit())
 171                                 return (1);
 172                         break;
 173                 case WAN_CREATE_MONSTER:
 174                         {
 175                                 int cnt = 1;
 176                                 if (!rn2(23))
 177                                         cnt += rn2(7) + 1;
 178                                 while (cnt--)
 179                                         makemon(NULL, u.ux, u.uy);
 180                         }
 181                         break;
 182                 case WAN_WISHING:
 183                         {
 184                                 char buf[BUFSZ];
 185                                 struct obj *otmp;
 186                                 if (u.uluck + rn2(5) < 0) {
 187                                         pline("Unfortunately, nothing happens.");
 188                                         break;
 189                                 }
 190                                 pline("You may wish for an object. What do you want? ");
 191                                 getlin(buf);
 192                                 if (buf[0] == '\033')
 193                                         buf[0] = 0;
 194                                 otmp = readobjnam(buf);
 195                                 otmp = addinv(otmp);
 196                                 prinv(otmp);
 197                                 break;
 198                         }
 199                 case WAN_DIGGING:
 200                         /*
 201                          * Original effect (approximately):
 202                          * from CORR: dig until we pierce a wall
 203                          * from ROOM: piece wall and dig until we reach
 204                          * an ACCESSIBLE place.
 205                          * Currently: dig for digdepth positions;
 206                          * also down on request of Lennart Augustsson.
 207                          */
 208                         {
 209                                 struct rm *room;
 210                                 int digdepth;
 211                                 if (u.uswallow) {
 212                                         struct monst *mtmp = u.ustuck;
 213
 214                                         pline("You pierce %s's stomach wall!",
 215                                             monnam(mtmp));
 216                                         mtmp->mhp = 1;  /* almost dead */
 217                                         unstuck(mtmp);
 218                                         mnexto(mtmp);
 219                                         break;
 220                                 }
 221                                 if (u.dz) {
 222                                         if (u.dz < 0) {
 223                                                 pline("You loosen a rock from the ceiling.");
 224                                                 pline("It falls on your head!");
 225                                                 losehp(1, "falling rock");
 226                                                 mksobj_at(ROCK, u.ux, u.uy);
 227                                                 fobj->quan = 1;
 228                                                 stackobj(fobj);
 229                                                 if (Invisible)
 230                                                         newsym(u.ux, u.uy);
 231                                         } else
 232                                                 dighole();
 233                                         break;
 234                                 }
 235                                 zx = u.ux + u.dx;
 236                                 zy = u.uy + u.dy;
 237                                 digdepth = 8 + rn2(18);
 238                                 Tmp_at(-1, '*');        /* open call */
 239                                 while (--digdepth >= 0) {
 240                                         if (!isok(zx, zy))
 241                                                 break;
 242                                         room = &levl[zx][zy];
 243                                         Tmp_at(zx, zy);
 244                                         if (!xdnstair) {
 245                                                 if (zx < 3 || zx > COLNO - 3 ||
 246                                                     zy < 3 || zy > ROWNO - 3)
 247                                                         break;
 248                                                 if (room->typ == HWALL ||
 249                                                     room->typ == VWALL) {
 250                                                         room->typ = ROOM;
 251                                                         break;
 252                                                 }
 253                                         } else if (room->typ == HWALL || room->typ == VWALL ||
 254                                             room->typ == SDOOR || room->typ == LDOOR) {
 255                                                 room->typ = DOOR;
 256                                                 digdepth -= 2;
 257                                         } else if (room->typ == SCORR || !room->typ) {
 258                                                 room->typ = CORR;
 259                                                 digdepth--;
 260                                         }
 261                                         mnewsym(zx, zy);
 262                                         zx += u.dx;
 263                                         zy += u.dy;
 264                                 }
 265                                 mnewsym(zx, zy);        /* not always necessary */
 266                                 Tmp_at(-1, -1);         /* closing call */
 267                                 break;
 268                         }
 269                 default:
 270                         buzz((int)obj->otyp - WAN_MAGIC_MISSILE,
 271                              u.ux, u.uy, u.dx, u.dy);
 272                         break;
 273                 }
 274                 if (!objects[obj->otyp].oc_name_known) {
 275                         objects[obj->otyp].oc_name_known = 1;
 276                         more_experienced(0, 10);
 277                 }
 278         }
 279         return (1);
 280 }
 281
 282 const char *
 283 exclam(int force)
 284 {
 285         /* force == 0 occurs e.g. with sleep ray */
 286         /* note that large force is usual with wands so that !! would
 287                 require information about hand/weapon/wand */
 288         return ((force < 0) ? "?" : (force <= 4) ? "." : "!");
 289 }
 290
 291 void
 292 hit(const char *str, struct monst *mtmp, const char *force)
 293 {
 294         /* force: usually either "." or "!" */
 295         if (!cansee(mtmp->mx, mtmp->my))
 296                 pline("The %s hits it.", str);
 297         else
 298                 pline("The %s hits %s%s", str, monnam(mtmp), force);
 299 }
 300
 301 void
 302 miss(const char *str, struct monst *mtmp)
 303 {
 304         if (!cansee(mtmp->mx, mtmp->my))
 305                 pline("The %s misses it.", str);
 306         else
 307                 pline("The %s misses %s.", str, monnam(mtmp));
 308 }
 309
 310 /*
 311  * bhit: called when a weapon is thrown (sym = obj->olet) or when an
 312  * IMMEDIATE wand is zapped (sym = 0); the weapon falls down at end of range
 313  * or when a monster is hit; the monster is returned, and bhitpos is set to
 314  * the final position of the weapon thrown; the ray of a wand may affect
 315  * several objects and monsters on its path - for each of these an argument
 316  * function is called.
 317  */
 318 /* check !u.uswallow before calling bhit() */
 319
 320 /* ddx, ddy, range:  direction and range
 321  * sym:  symbol displayed on path
 322  * fhitm, fhito:  fns called when mon/obj hit
 323  * obj:  2nd arg to fhitm/fhito
 324  */
 325 struct monst *
 326 bhit(int ddx, int ddy, int range, char sym,
 327      void (*fhitm)(struct monst *, struct obj *),
 328      bool (*fhito)(struct obj *, struct obj *), struct obj *obj)
 329 {
 330         struct monst *mtmp;
 331         struct obj *otmp;
 332         int typ;
 333
 334         bhitpos.x = u.ux;
 335         bhitpos.y = u.uy;
 336
 337         if (sym)        /* open call */
 338                 tmp_at(-1, sym);
 339         while (range-- > 0) {
 340                 bhitpos.x += ddx;
 341                 bhitpos.y += ddy;
 342                 typ = levl[bhitpos.x][bhitpos.y].typ;
 343                 if ((mtmp = m_at(bhitpos.x, bhitpos.y))) {
 344                         if (sym) {
 345                                 tmp_at(-1, -1); /* close call */
 346                                 return (mtmp);
 347                         }
 348                         (*fhitm)(mtmp, obj);
 349                         range -= 3;
 350                 }
 351                 if (fhito && (otmp = o_at(bhitpos.x, bhitpos.y))) {
 352                         if ((*fhito)(otmp, obj))
 353                                 range--;
 354                 }
 355                 if (!ZAP_POS(typ)) {
 356                         bhitpos.x -= ddx;
 357                         bhitpos.y -= ddy;
 358                         break;
 359                 }
 360                 if (sym)
 361                         tmp_at(bhitpos.x, bhitpos.y);
 362         }
 363
 364         /* leave last symbol unless in a pool */
 365         if (sym)
 366                 tmp_at(-1, (levl[bhitpos.x][bhitpos.y].typ == POOL) ? -1 : 0);
 367         return (0);
 368 }
 369
 370 struct monst *
 371 boomhit(int dx, int dy)
 372 {
 373         int i, ct;
 374         struct monst *mtmp;
 375         char sym = ')';
 376
 377         bhitpos.x = u.ux;
 378         bhitpos.y = u.uy;
 379
 380         for (i = 0; i < 8; i++)
 381                 if (xdir[i] == dx && ydir[i] == dy)
 382                         break;
 383         tmp_at(-1, sym);        /* open call */
 384         for (ct = 0; ct < 10; ct++) {
 385                 if (i == 8)
 386                         i = 0;
 387                 sym = ')' + '(' - sym;
 388                 tmp_at(-2, sym);        /* change let call */
 389                 dx = xdir[i];
 390                 dy = ydir[i];
 391                 bhitpos.x += dx;
 392                 bhitpos.y += dy;
 393                 if ((mtmp = m_at(bhitpos.x, bhitpos.y)) != NULL) {
 394                         tmp_at(-1, -1);
 395                         return (mtmp);
 396                 }
 397                 if (!ZAP_POS(levl[bhitpos.x][bhitpos.y].typ)) {
 398                         bhitpos.x -= dx;
 399                         bhitpos.y -= dy;
 400                         break;
 401                 }
 402                 if (bhitpos.x == u.ux && bhitpos.y == u.uy) {   /* ct == 9 */
 403                         if (rn2(20) >= 10 + u.ulevel) { /* we hit ourselves */
 404                                 thitu(10, rnd(10), "boomerang");
 405                                 break;
 406                         } else {        /* we catch it */
 407                                 tmp_at(-1, -1);
 408                                 pline("Skillfully, you catch the boomerang.");
 409                                 return (&youmonst);
 410                         }
 411                 }
 412                 tmp_at(bhitpos.x, bhitpos.y);
 413                 if (ct % 5 != 0)
 414                         i++;
 415         }
 416         tmp_at(-1, -1);         /* do not leave last symbol */
 417         return (0);
 418 }
 419
 420 static char
 421 dirlet(int dx, int dy)
 422 {
 423         return
 424                 (dx == dy) ? '\\' : (dx && dy) ? '/' : dx ? '-' : '|';
 425 }
 426
 427 /* type == -1: monster spitting fire at you */
 428 /* type == -1,-2,-3: bolts sent out by wizard */
 429 /* called with dx = dy = 0 with vertical bolts */
 430 void
 431 buzz(int type, xchar sx, xchar sy, int dx, int dy)
 432 {
 433         int abstype = abs(type);
 434         const char *fltxt = (type == -1) ? "blaze of fire" : fl[abstype];
 435         struct rm *lev;
 436         xchar range;
 437         struct monst *mon;
 438
 439         if (u.uswallow) {
 440                 int tmp;
 441
 442                 if (type < 0)
 443                         return;
 444                 tmp = zhit(u.ustuck, type);
 445                 pline("The %s rips into %s%s",
 446                       fltxt, monnam(u.ustuck), exclam(tmp));
 447                 return;
 448         }
 449         if (type < 0)
 450                 pru();
 451         range = rn1(7, 7);
 452         Tmp_at(-1, dirlet(dx, dy));     /* open call */
 453         while (range-- > 0) {
 454                 sx += dx;
 455                 sy += dy;
 456                 if ((lev = &levl[sx][sy])->typ)
 457                         Tmp_at(sx, sy);
 458                 else {
 459                         int bounce = 0;
 460                         if (cansee(sx - dx, sy - dy))
 461                                 pline("The %s bounces!", fltxt);
 462                         if (ZAP_POS(levl[sx][sy - dy].typ))
 463                                 bounce = 1;
 464                         if (ZAP_POS(levl[sx - dx][sy].typ)) {
 465                                 if (!bounce || rn2(2))
 466                                         bounce = 2;
 467                         }
 468                         switch (bounce) {
 469                         case 0:
 470                                 dx = -dx;
 471                                 dy = -dy;
 472                                 continue;
 473                         case 1:
 474                                 dy = -dy;
 475                                 sx -= dx;
 476                                 break;
 477                         case 2:
 478                                 dx = -dx;
 479                                 sy -= dy;
 480                                 break;
 481                         }
 482                         Tmp_at(-2, dirlet(dx, dy));
 483                         continue;
 484                 }
 485                 if (lev->typ == POOL && abstype == 1 /* fire */) {
 486                         range -= 3;
 487                         lev->typ = ROOM;
 488                         if (cansee(sx, sy)) {
 489                                 mnewsym(sx, sy);
 490                                 pline("The water evaporates.");
 491                         } else
 492                                 pline("You hear a hissing sound.");
 493                 }
 494                 if ((mon = m_at(sx, sy)) &&
 495                     (type != -1 || mon->data->mlet != 'D')) {
 496                         wakeup(mon);
 497                         if (rnd(20) < 18 + mon->data->ac) {
 498                                 int tmp = zhit(mon, abstype);
 499                                 if (mon->mhp < 1) {
 500                                         if (type < 0) {
 501                                                 if (cansee(mon->mx, mon->my))
 502                                                         pline("%s is killed by the %s!",
 503                                                             Monnam(mon), fltxt);
 504                                                 mondied(mon);
 505                                         } else
 506                                                 killed(mon);
 507                                 } else
 508                                         hit(fltxt, mon, exclam(tmp));
 509                                 range -= 2;
 510                         } else
 511                                 miss(fltxt, mon);
 512                 } else if (sx == u.ux && sy == u.uy) {
 513                         nomul(0);
 514                         if (rnd(20) < 18 + u.uac) {
 515                                 int dam = 0;
 516                                 range -= 2;
 517                                 pline("The %s hits you!", fltxt);
 518                                 switch (abstype) {
 519                                 case 0:
 520                                         dam = d(2, 6);
 521                                         break;
 522                                 case 1:
 523                                         if (Fire_resistance)
 524                                                 pline("You don't feel hot!");
 525                                         else
 526                                                 dam = d(6, 6);
 527                                         if (!rn2(3))
 528                                                 burn_scrolls();
 529                                         break;
 530                                 case 2:
 531                                         nomul(-rnd(25));        /* sleep ray */
 532                                         break;
 533                                 case 3:
 534                                         if (Cold_resistance)
 535                                                 pline("You don't feel cold!");
 536                                         else
 537                                                 dam = d(6, 6);
 538                                         break;
 539                                 case 4:
 540                                         u.uhp = -1;
 541                                 }
 542                                 losehp(dam, fltxt);
 543                         } else
 544                                 pline("The %s whizzes by you!", fltxt);
 545                         stop_occupation();
 546                 }
 547                 if (!ZAP_POS(lev->typ)) {
 548                         int bounce = 0, rmn;
 549                         if (cansee(sx, sy))
 550                                 pline("The %s bounces!", fltxt);
 551                         range--;
 552                         if (!dx || !dy || !rn2(20)) {
 553                                 dx = -dx;
 554                                 dy = -dy;
 555                         } else {
 556                                 if (ZAP_POS(rmn = levl[sx][sy - dy].typ) &&
 557                                     (IS_ROOM(rmn) || ZAP_POS(levl[sx + dx][sy - dy].typ)))
 558                                         bounce = 1;
 559                                 if (ZAP_POS(rmn = levl[sx - dx][sy].typ) &&
 560                                     (IS_ROOM(rmn) || ZAP_POS(levl[sx - dx][sy + dy].typ)))
 561                                         if (!bounce || rn2(2))
 562                                                 bounce = 2;
 563
 564                                 switch (bounce) {
 565                                 case 0:
 566                                         dy = -dy;
 567                                         dx = -dx;
 568                                         break;
 569                                 case 1:
 570                                         dy = -dy;
 571                                         break;
 572                                 case 2:
 573                                         dx = -dx;
 574                                         break;
 575                                 }
 576                                 Tmp_at(-2, dirlet(dx, dy));
 577                         }
 578                 }
 579         }
 580         Tmp_at(-1, -1);
 581 }
 582
 583 static int
 584 zhit(struct monst *mon, int type)       /* returns damage to mon */
 585 {
 586         int tmp = 0;
 587
 588         switch (type) {
 589         case 0:         /* magic missile */
 590                 tmp = d(2, 6);
 591                 break;
 592         case -1:        /* Dragon blazing fire */
 593         case 1:         /* fire */
 594                 if (strchr("Dg", mon->data->mlet))
 595                         break;
 596                 tmp = d(6, 6);
 597                 if (strchr("YF", mon->data->mlet))
 598                         tmp += 7;
 599                 break;
 600         case 2:         /* sleep*/
 601                 mon->mfroz = 1;
 602                 break;
 603         case 3:         /* cold */
 604                 if (strchr("YFgf", mon->data->mlet))
 605                         break;
 606                 tmp = d(6, 6);
 607                 if (mon->data->mlet == 'D')
 608                         tmp += 7;
 609                 break;
 610         case 4:         /* death*/
 611                 if (strchr(UNDEAD, mon->data->mlet))
 612                         break;
 613                 tmp = mon->mhp + 1;
 614                 break;
 615         }
 616         mon->mhp -= tmp;
 617         return (tmp);
 618 }
 619
 620 #define CORPSE_I_TO_C(otyp)     (char) ((otyp >= DEAD_ACID_BLOB)\
 621                      ?  'a' + (otyp - DEAD_ACID_BLOB)\
 622                      :  '@' + (otyp - DEAD_HUMAN))
 623 static bool
 624 revive(struct obj *obj)
 625 {
 626         struct monst *mtmp = NULL;
 627
 628         if (obj->olet == FOOD_SYM && obj->otyp > CORPSE) {
 629                 /* do not (yet) revive shopkeepers */
 630                 /* Note: this might conceivably produce two monsters
 631                  *      at the same position - strange, but harmless */
 632                 mtmp = mkmon_at(CORPSE_I_TO_C(obj->otyp), obj->ox, obj->oy);
 633                 delobj(obj);
 634         }
 635         return (!!mtmp);        /* TRUE if some monster created */
 636 }
 637
 638 static void
 639 rloco(struct obj *obj)
 640 {
 641         int tx, ty, otx, oty;
 642
 643         otx = obj->ox;
 644         oty = obj->oy;
 645         do {
 646                 tx = rn1(COLNO - 3, 2);
 647                 ty = rn2(ROWNO);
 648         } while (!goodpos(tx, ty));
 649         obj->ox = tx;
 650         obj->oy = ty;
 651         if (cansee(otx, oty))
 652                 newsym(otx, oty);
 653 }
 654
 655 /* fractured by pick-axe or wand of striking */
 656 /* no texts here! */
 657 void
 658 fracture_rock(struct obj *obj)
 659 {
 660         obj->otyp = ROCK;
 661         obj->quan = 7 + rn2(60);
 662         obj->owt = weight(obj);
 663         obj->olet = WEAPON_SYM;
 664         if (cansee(obj->ox, obj->oy))
 665                 prl(obj->ox, obj->oy);
 666 }
 667
 668 static void
 669 burn_scrolls(void)
 670 {
 671         struct obj *obj, *obj2;
 672         int cnt = 0;
 673
 674         for (obj = invent; obj; obj = obj2) {
 675                 obj2 = obj->nobj;
 676                 if (obj->olet == SCROLL_SYM) {
 677                         cnt++;
 678                         useup(obj);
 679                 }
 680         }
 681         if (cnt > 1) {
 682                 pline("Your scrolls catch fire!");
 683                 losehp(cnt, "burning scrolls");
 684         } else if (cnt) {
 685                 pline("Your scroll catches fire!");
 686                 losehp(1, "burning scroll");
 687         }
 688 }