hack/hack.zap.c

   1 /*      $NetBSD: hack.zap.c,v 1.8 2009/06/07 18:30:39 dholland 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 <sys/cdefs.h>
  65 #ifndef lint
  66 __RCSID("$NetBSD: hack.zap.c,v 1.8 2009/06/07 18:30:39 dholland Exp $");
  67 #endif                          /* not lint */
  68
  69 #include "hack.h"
  70 #include "extern.h"
  71
  72 const char           *const fl[] = {
  73         "magic missile",
  74         "bolt of fire",
  75         "sleep ray",
  76         "bolt of cold",
  77         "death ray"
  78 };
  79
  80 /* Routines for IMMEDIATE wands. */
  81 /* bhitm: monster mtmp was hit by the effect of wand otmp */
  82 void
  83 bhitm(struct monst *mtmp, struct obj *otmp)
  84 {
  85         wakeup(mtmp);
  86         switch (otmp->otyp) {
  87         case WAN_STRIKING:
  88                 if (u.uswallow || rnd(20) < 10 + mtmp->data->ac) {
  89                         int             tmp = d(2, 12);
  90                         hit("wand", mtmp, exclam(tmp));
  91                         mtmp->mhp -= tmp;
  92                         if (mtmp->mhp < 1)
  93                                 killed(mtmp);
  94                 } else
  95                         miss("wand", mtmp);
  96                 break;
  97         case WAN_SLOW_MONSTER:
  98                 mtmp->mspeed = MSLOW;
  99                 break;
 100         case WAN_SPEED_MONSTER:
 101                 mtmp->mspeed = MFAST;
 102                 break;
 103         case WAN_UNDEAD_TURNING:
 104                 if (strchr(UNDEAD, mtmp->data->mlet)) {
 105                         mtmp->mhp -= rnd(8);
 106                         if (mtmp->mhp < 1)
 107                                 killed(mtmp);
 108                         else
 109                                 mtmp->mflee = 1;
 110                 }
 111                 break;
 112         case WAN_POLYMORPH:
 113                 if (newcham(mtmp, &mons[rn2(CMNUM)]))
 114                         objects[otmp->otyp].oc_name_known = 1;
 115                 break;
 116         case WAN_CANCELLATION:
 117                 mtmp->mcan = 1;
 118                 break;
 119         case WAN_TELEPORTATION:
 120                 rloc(mtmp);
 121                 break;
 122         case WAN_MAKE_INVISIBLE:
 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 /*
 136  * object obj was hit by the effect of wand otmp
 137  * returns TRUE if sth was done
 138  */
 139 int
 140 bhito(struct obj *obj, struct obj *otmp)
 141 {
 142         int             res = TRUE;
 143
 144         if (obj == uball || obj == uchain)
 145                 res = FALSE;
 146         else
 147                 switch (otmp->otyp) {
 148                 case WAN_POLYMORPH:
 149                         /*
 150                          * preserve symbol and quantity, but turn rocks into
 151                          * gems
 152                          */
 153                         mkobj_at((obj->otyp == ROCK || obj->otyp == ENORMOUS_ROCK)
 154                                  ? GEM_SYM : obj->olet,
 155                                  obj->ox, obj->oy)->quan = obj->quan;
 156                         delobj(obj);
 157                         break;
 158                 case WAN_STRIKING:
 159                         if (obj->otyp == ENORMOUS_ROCK)
 160                                 fracture_rock(obj);
 161                         else
 162                                 res = FALSE;
 163                         break;
 164                 case WAN_CANCELLATION:
 165                         if (obj->spe && obj->olet != AMULET_SYM) {
 166                                 obj->known = 0;
 167                                 obj->spe = 0;
 168                         }
 169                         break;
 170                 case WAN_TELEPORTATION:
 171                         rloco(obj);
 172                         break;
 173                 case WAN_MAKE_INVISIBLE:
 174                         obj->oinvis = 1;
 175                         break;
 176                 case WAN_UNDEAD_TURNING:
 177                         res = revive(obj);
 178                         break;
 179                 case WAN_SLOW_MONSTER:  /* no effect on objects */
 180                 case WAN_SPEED_MONSTER:
 181 #ifdef WAN_PROBING
 182                 case WAN_PROBING:
 183 #endif  /* WAN_PROBING */
 184                         res = FALSE;
 185                         break;
 186                 default:
 187                         impossible("What an interesting wand (%u)", otmp->otyp);
 188                 }
 189         return (res);
 190 }
 191
 192 int
 193 dozap(void)
 194 {
 195         struct obj     *obj;
 196         xchar           zx, zy;
 197
 198         obj = getobj("/", "zap");
 199         if (!obj)
 200                 return (0);
 201         if (obj->spe < 0 || (obj->spe == 0 && rn2(121))) {
 202                 pline("Nothing Happens.");
 203                 return (1);
 204         }
 205         if (obj->spe == 0)
 206                 pline("You wrest one more spell from the worn-out wand.");
 207         if (!(objects[obj->otyp].bits & NODIR) && !getdir(1))
 208                 return (1);     /* make him pay for knowing !NODIR */
 209         obj->spe--;
 210         if (objects[obj->otyp].bits & IMMEDIATE) {
 211                 if (u.uswallow)
 212                         bhitm(u.ustuck, obj);
 213                 else if (u.dz) {
 214                         if (u.dz > 0) {
 215                                 struct obj     *otmp = o_at(u.ux, u.uy);
 216                                 if (otmp)
 217                                         (void) bhito(otmp, obj);
 218                         }
 219                 } else
 220                         (void) bhit(u.dx, u.dy, rn1(8, 6), 0, bhitm, bhito, obj);
 221         } else {
 222                 switch (obj->otyp) {
 223                 case WAN_LIGHT:
 224                         litroom(TRUE);
 225                         break;
 226                 case WAN_SECRET_DOOR_DETECTION:
 227                         if (!findit())
 228                                 return (1);
 229                         break;
 230                 case WAN_CREATE_MONSTER:
 231                         {
 232                                 int             cnt = 1;
 233                                 if (!rn2(23))
 234                                         cnt += rn2(7) + 1;
 235                                 while (cnt--)
 236                                         (void) makemon((struct permonst *) 0, u.ux, u.uy);
 237                         }
 238                         break;
 239                 case WAN_WISHING:
 240                         {
 241                                 char            buf[BUFSZ];
 242                                 struct obj     *otmp;
 243                                 if (u.uluck + rn2(5) < 0) {
 244                                         pline("Unfortunately, nothing happens.");
 245                                         break;
 246                                 }
 247                                 pline("You may wish for an object. What do you want? ");
 248                                 getlin(buf);
 249                                 if (buf[0] == '\033')
 250                                         buf[0] = 0;
 251                                 otmp = readobjnam(buf);
 252                                 otmp = addinv(otmp);
 253                                 prinv(otmp);
 254                                 break;
 255                         }
 256                 case WAN_DIGGING:
 257                         /*
 258                          * Original effect (approximately): from CORR: dig
 259                          * until we pierce a wall from ROOM: piece wall and
 260                          * dig until we reach an ACCESSIBLE place. Currently:
 261                          * dig for digdepth positions; also down on request
 262                          * of Lennart Augustsson.
 263                          */
 264                         {
 265                                 struct rm      *room;
 266                                 int             digdepth;
 267                                 if (u.uswallow) {
 268                                         struct monst   *mtmp = u.ustuck;
 269
 270                                         pline("You pierce %s's stomach wall!",
 271                                               monnam(mtmp));
 272                                         mtmp->mhp = 1;  /* almost dead */
 273                                         unstuck(mtmp);
 274                                         mnexto(mtmp);
 275                                         break;
 276                                 }
 277                                 if (u.dz) {
 278                                         if (u.dz < 0) {
 279                                                 pline("You loosen a rock from the ceiling.");
 280                                                 pline("It falls on your head!");
 281                                                 losehp(1, "falling rock");
 282                                                 mksobj_at(ROCK, u.ux, u.uy);
 283                                                 fobj->quan = 1;
 284                                                 stackobj(fobj);
 285                                                 if (Invisible)
 286                                                         newsym(u.ux, u.uy);
 287                                         } else {
 288                                                 dighole();
 289                                         }
 290                                         break;
 291                                 }
 292                                 zx = u.ux + u.dx;
 293                                 zy = u.uy + u.dy;
 294                                 digdepth = 8 + rn2(18);
 295                                 Tmp_at(-1, '*');        /* open call */
 296                                 while (--digdepth >= 0) {
 297                                         if (!isok(zx, zy))
 298                                                 break;
 299                                         room = &levl[zx][zy];
 300                                         Tmp_at(zx, zy);
 301                                         if (!xdnstair) {
 302                                                 if (zx < 3 || zx > COLNO - 3 ||
 303                                                     zy < 3 || zy > ROWNO - 3)
 304                                                         break;
 305                                                 if (room->typ == HWALL ||
 306                                                     room->typ == VWALL) {
 307                                                         room->typ = ROOM;
 308                                                         break;
 309                                                 }
 310                                         } else if (room->typ == HWALL || room->typ == VWALL ||
 311                                                    room->typ == SDOOR || room->typ == LDOOR) {
 312                                                 room->typ = DOOR;
 313                                                 digdepth -= 2;
 314                                         } else if (room->typ == SCORR || !room->typ) {
 315                                                 room->typ = CORR;
 316                                                 digdepth--;
 317                                         }
 318                                         mnewsym(zx, zy);
 319                                         zx += u.dx;
 320                                         zy += u.dy;
 321                                 }
 322                                 mnewsym(zx, zy);        /* not always necessary */
 323                                 Tmp_at(-1, -1); /* closing call */
 324                                 break;
 325                         }
 326                 default:
 327                         buzz((int) obj->otyp - WAN_MAGIC_MISSILE,
 328                              u.ux, u.uy, u.dx, u.dy);
 329                         break;
 330                 }
 331                 if (!objects[obj->otyp].oc_name_known) {
 332                         objects[obj->otyp].oc_name_known = 1;
 333                         more_experienced(0, 10);
 334                 }
 335         }
 336         return (1);
 337 }
 338
 339 const char           *
 340 exclam(int force)
 341 {
 342         /* force == 0 occurs e.g. with sleep ray */
 343         /*
 344          * note that large force is usual with wands so that !! would require
 345          * information about hand/weapon/wand
 346          */
 347         return ((force < 0) ? "?" : (force <= 4) ? "." : "!");
 348 }
 349
 350 void
 351 hit(const char *str, struct monst *mtmp, const char *force)
 352 {
 353         /* force is usually either "." or "!" */
 354
 355         if (!cansee(mtmp->mx, mtmp->my))
 356                 pline("The %s hits it.", str);
 357         else
 358                 pline("The %s hits %s%s", str, monnam(mtmp), force);
 359 }
 360
 361 void
 362 miss(const char *str, struct monst *mtmp)
 363 {
 364         if (!cansee(mtmp->mx, mtmp->my))
 365                 pline("The %s misses it.", str);
 366         else
 367                 pline("The %s misses %s.", str, monnam(mtmp));
 368 }
 369
 370 /*
 371  * bhit: called when a weapon is thrown (sym = obj->olet) or when an
 372  * IMMEDIATE wand is zapped (sym = 0); the weapon falls down at end of range
 373  * or when a monster is hit; the monster is returned, and bhitpos is set to
 374  * the final position of the weapon thrown; the ray of a wand may affect
 375  * several objects and monsters on its path - for each of these an argument
 376  * function is called.
 377  */
 378 /* check !u.uswallow before calling bhit() */
 379
 380 struct monst   *
 381 bhit(int ddx, int ddy, int range,       /* direction and range */
 382      int sym,                           /* symbol displayed on path */
 383                                         /* fns called when mon/obj hit */
 384      void (*fhitm)(struct monst *, struct obj *),
 385      int (*fhito)(struct obj *, struct obj *),
 386      struct obj *obj)                   /* 2nd arg to fhitm/fhito */
 387 {
 388         struct monst   *mtmp;
 389         struct obj     *otmp;
 390         int             typ;
 391
 392         bhitpos.x = u.ux;
 393         bhitpos.y = u.uy;
 394
 395         if (sym)
 396                 tmp_at(-1, sym);/* open call */
 397         while (range-- > 0) {
 398                 bhitpos.x += ddx;
 399                 bhitpos.y += ddy;
 400                 typ = levl[bhitpos.x][bhitpos.y].typ;
 401                 if ((mtmp = m_at(bhitpos.x, bhitpos.y)) != NULL) {
 402                         if (sym) {
 403                                 tmp_at(-1, -1); /* close call */
 404                                 return (mtmp);
 405                         }
 406                         (*fhitm) (mtmp, obj);
 407                         range -= 3;
 408                 }
 409                 if (fhito && (otmp = o_at(bhitpos.x, bhitpos.y))) {
 410                         if ((*fhito) (otmp, obj))
 411                                 range--;
 412                 }
 413                 if (!ZAP_POS(typ)) {
 414                         bhitpos.x -= ddx;
 415                         bhitpos.y -= ddy;
 416                         break;
 417                 }
 418                 if (sym)
 419                         tmp_at(bhitpos.x, bhitpos.y);
 420         }
 421
 422         /* leave last symbol unless in a pool */
 423         if (sym)
 424                 tmp_at(-1, (levl[bhitpos.x][bhitpos.y].typ == POOL) ? -1 : 0);
 425         return (0);
 426 }
 427
 428 struct monst   *
 429 boomhit(int dx, int dy)
 430 {
 431         int             i, ct;
 432         struct monst   *mtmp;
 433         char            sym = ')';
 434
 435         bhitpos.x = u.ux;
 436         bhitpos.y = u.uy;
 437
 438         for (i = 0; i < 8; i++)
 439                 if (xdir[i] == dx && ydir[i] == dy)
 440                         break;
 441         tmp_at(-1, sym);        /* open call */
 442         for (ct = 0; ct < 10; ct++) {
 443                 if (i == 8)
 444                         i = 0;
 445                 sym = ')' + '(' - sym;
 446                 tmp_at(-2, sym);/* change let call */
 447                 dx = xdir[i];
 448                 dy = ydir[i];
 449                 bhitpos.x += dx;
 450                 bhitpos.y += dy;
 451                 if ((mtmp = m_at(bhitpos.x, bhitpos.y)) != NULL) {
 452                         tmp_at(-1, -1);
 453                         return (mtmp);
 454                 }
 455                 if (!ZAP_POS(levl[bhitpos.x][bhitpos.y].typ)) {
 456                         bhitpos.x -= dx;
 457                         bhitpos.y -= dy;
 458                         break;
 459                 }
 460                 if (bhitpos.x == u.ux && bhitpos.y == u.uy) {   /* ct == 9 */
 461                         if (rn2(20) >= 10 + u.ulevel) { /* we hit ourselves */
 462                                 (void) thitu(10, rnd(10), "boomerang");
 463                                 break;
 464                         } else {/* we catch it */
 465                                 tmp_at(-1, -1);
 466                                 pline("Skillfully, you catch the boomerang.");
 467                                 return (&youmonst);
 468                         }
 469                 }
 470                 tmp_at(bhitpos.x, bhitpos.y);
 471                 if (ct % 5 != 0)
 472                         i++;
 473         }
 474         tmp_at(-1, -1);         /* do not leave last symbol */
 475         return (0);
 476 }
 477
 478 char
 479 dirlet(int dx, int dy)
 480 {
 481         return
 482                 (dx == dy) ? '\\' : (dx && dy) ? '/' : dx ? '-' : '|';
 483 }
 484
 485 /* type == -1: monster spitting fire at you */
 486 /* type == -1,-2,-3: bolts sent out by wizard */
 487 /* called with dx = dy = 0 with vertical bolts */
 488 void
 489 buzz(int type, xchar sx, xchar sy, int dx, int dy)
 490 {
 491         int             abstype = abs(type);
 492         const char     *fltxt = (type == -1) ? "blaze of fire" : fl[abstype];
 493         struct rm      *lev;
 494         xchar           range;
 495         struct monst   *mon;
 496
 497         if (u.uswallow) {
 498                 int             tmp;
 499
 500                 if (type < 0)
 501                         return;
 502                 tmp = zhit(u.ustuck, type);
 503                 pline("The %s rips into %s%s",
 504                       fltxt, monnam(u.ustuck), exclam(tmp));
 505                 return;
 506         }
 507         if (type < 0)
 508                 pru();
 509         range = rn1(7, 7);
 510         Tmp_at(-1, dirlet(dx, dy));     /* open call */
 511         while (range-- > 0) {
 512                 sx += dx;
 513                 sy += dy;
 514                 if ((lev = &levl[sx][sy])->typ)
 515                         Tmp_at(sx, sy);
 516                 else {
 517                         int             bounce = 0;
 518                         if (cansee(sx - dx, sy - dy))
 519                                 pline("The %s bounces!", fltxt);
 520                         if (ZAP_POS(levl[sx][sy - dy].typ))
 521                                 bounce = 1;
 522                         if (ZAP_POS(levl[sx - dx][sy].typ)) {
 523                                 if (!bounce || rn2(2))
 524                                         bounce = 2;
 525                         }
 526                         switch (bounce) {
 527                         case 0:
 528                                 dx = -dx;
 529                                 dy = -dy;
 530                                 continue;
 531                         case 1:
 532                                 dy = -dy;
 533                                 sx -= dx;
 534                                 break;
 535                         case 2:
 536                                 dx = -dx;
 537                                 sy -= dy;
 538                                 break;
 539                         }
 540                         Tmp_at(-2, dirlet(dx, dy));
 541                         continue;
 542                 }
 543                 if (lev->typ == POOL && abstype == 1 /* fire */ ) {
 544                         range -= 3;
 545                         lev->typ = ROOM;
 546                         if (cansee(sx, sy)) {
 547                                 mnewsym(sx, sy);
 548                                 pline("The water evaporates.");
 549                         } else
 550                                 pline("You hear a hissing sound.");
 551                 }
 552                 if ((mon = m_at(sx, sy)) &&
 553                     (type != -1 || mon->data->mlet != 'D')) {
 554                         wakeup(mon);
 555                         if (rnd(20) < 18 + mon->data->ac) {
 556                                 int             tmp = zhit(mon, abstype);
 557                                 if (mon->mhp < 1) {
 558                                         if (type < 0) {
 559                                                 if (cansee(mon->mx, mon->my))
 560                                                         pline("%s is killed by the %s!",
 561                                                         Monnam(mon), fltxt);
 562                                                 mondied(mon);
 563                                         } else
 564                                                 killed(mon);
 565                                 } else
 566                                         hit(fltxt, mon, exclam(tmp));
 567                                 range -= 2;
 568                         } else
 569                                 miss(fltxt, mon);
 570                 } else if (sx == u.ux && sy == u.uy) {
 571                         nomul(0);
 572                         if (rnd(20) < 18 + u.uac) {
 573                                 int             dam = 0;
 574                                 range -= 2;
 575                                 pline("The %s hits you!", fltxt);
 576                                 switch (abstype) {
 577                                 case 0:
 578                                         dam = d(2, 6);
 579                                         break;
 580                                 case 1:
 581                                         if (Fire_resistance)
 582                                                 pline("You don't feel hot!");
 583                                         else
 584                                                 dam = d(6, 6);
 585                                         if (!rn2(3))
 586                                                 burn_scrolls();
 587                                         break;
 588                                 case 2:
 589                                         nomul(-rnd(25));        /* sleep ray */
 590                                         break;
 591                                 case 3:
 592                                         if (Cold_resistance)
 593                                                 pline("You don't feel cold!");
 594                                         else
 595                                                 dam = d(6, 6);
 596                                         break;
 597                                 case 4:
 598                                         u.uhp = -1;
 599                                 }
 600                                 losehp(dam, fltxt);
 601                         } else
 602                                 pline("The %s whizzes by you!", fltxt);
 603                         stop_occupation();
 604                 }
 605                 if (!ZAP_POS(lev->typ)) {
 606                         int             bounce = 0, rmn;
 607                         if (cansee(sx, sy))
 608                                 pline("The %s bounces!", fltxt);
 609                         range--;
 610                         if (!dx || !dy || !rn2(20)) {
 611                                 dx = -dx;
 612                                 dy = -dy;
 613                         } else {
 614                                 if (ZAP_POS(rmn = levl[sx][sy - dy].typ) &&
 615                                     (IS_ROOM(rmn) || ZAP_POS(levl[sx + dx][sy - dy].typ)))
 616                                         bounce = 1;
 617                                 if (ZAP_POS(rmn = levl[sx - dx][sy].typ) &&
 618                                     (IS_ROOM(rmn) || ZAP_POS(levl[sx - dx][sy + dy].typ)))
 619                                         if (!bounce || rn2(2))
 620                                                 bounce = 2;
 621
 622                                 switch (bounce) {
 623                                 case 0:
 624                                         dy = -dy;
 625                                         dx = -dx;
 626                                         break;
 627                                 case 1:
 628                                         dy = -dy;
 629                                         break;
 630                                 case 2:
 631                                         dx = -dx;
 632                                         break;
 633                                 }
 634                                 Tmp_at(-2, dirlet(dx, dy));
 635                         }
 636                 }
 637         }
 638         Tmp_at(-1, -1);
 639 }
 640
 641 int
 642 zhit(struct monst *mon, int type)               /* returns damage to mon */
 643 {
 644         int             tmp = 0;
 645
 646         switch (type) {
 647         case 0:         /* magic missile */
 648                 tmp = d(2, 6);
 649                 break;
 650         case -1:                /* Dragon blazing fire */
 651         case 1:         /* fire */
 652                 if (strchr("Dg", mon->data->mlet))
 653                         break;
 654                 tmp = d(6, 6);
 655                 if (strchr("YF", mon->data->mlet))
 656                         tmp += 7;
 657                 break;
 658         case 2:         /* sleep */
 659                 mon->mfroz = 1;
 660                 break;
 661         case 3:         /* cold */
 662                 if (strchr("YFgf", mon->data->mlet))
 663                         break;
 664                 tmp = d(6, 6);
 665                 if (mon->data->mlet == 'D')
 666                         tmp += 7;
 667                 break;
 668         case 4:         /* death */
 669                 if (strchr(UNDEAD, mon->data->mlet))
 670                         break;
 671                 tmp = mon->mhp + 1;
 672                 break;
 673         }
 674         mon->mhp -= tmp;
 675         return (tmp);
 676 }
 677
 678 #define CORPSE_I_TO_C(otyp)     (char) ((otyp >= DEAD_ACID_BLOB)\
 679                      ?  'a' + (otyp - DEAD_ACID_BLOB)\
 680                      :  '@' + (otyp - DEAD_HUMAN))
 681 int
 682 revive(struct obj *obj)
 683 {
 684         struct monst   *mtmp = NULL;
 685
 686         if (obj->olet == FOOD_SYM && obj->otyp > CORPSE) {
 687                 /* do not (yet) revive shopkeepers */
 688                 /*
 689                  * Note: this might conceivably produce two monsters at the
 690                  * same position - strange, but harmless
 691                  */
 692                 mtmp = mkmon_at(CORPSE_I_TO_C(obj->otyp), obj->ox, obj->oy);
 693                 delobj(obj);
 694         }
 695         return (!!mtmp);        /* TRUE if some monster created */
 696 }
 697
 698 void
 699 rloco(struct obj *obj)
 700 {
 701         int tx, ty, otx, oty;
 702
 703         otx = obj->ox;
 704         oty = obj->oy;
 705         do {
 706                 tx = rn1(COLNO - 3, 2);
 707                 ty = rn2(ROWNO);
 708         } while (!goodpos(tx, ty));
 709         obj->ox = tx;
 710         obj->oy = ty;
 711         if (cansee(otx, oty))
 712                 newsym(otx, oty);
 713 }
 714
 715 /* fractured by pick-axe or wand of striking */
 716 /* no texts here! */
 717 void
 718 fracture_rock(struct obj *obj)
 719 {
 720         /* unpobj(obj); */
 721         obj->otyp = ROCK;
 722         obj->quan = 7 + rn2(60);
 723         obj->owt = weight(obj);
 724         obj->olet = WEAPON_SYM;
 725         if (cansee(obj->ox, obj->oy))
 726                 prl(obj->ox, obj->oy);
 727 }
 728
 729 void
 730 burn_scrolls(void)
 731 {
 732         struct obj     *obj, *obj2;
 733         int             cnt = 0;
 734
 735         for (obj = invent; obj; obj = obj2) {
 736                 obj2 = obj->nobj;
 737                 if (obj->olet == SCROLL_SYM) {
 738                         cnt++;
 739                         useup(obj);
 740                 }
 741         }
 742         if (cnt > 1) {
 743                 pline("Your scrolls catch fire!");
 744                 losehp(cnt, "burning scrolls");
 745         } else if (cnt) {
 746                 pline("Your scroll catches fire!");
 747                 losehp(1, "burning scroll");
 748         }
 749 }