games/hack/hack.c

   1 /* Copyright (c) Stichting Mathematisch Centrum, Amsterdam, 1985. */
   2 /* hack.c - version 1.0.3 */
   3 /* $FreeBSD: src/games/hack/hack.c,v 1.4 1999/11/16 10:26:35 marcel Exp $ */
   4
   5 #include "hack.h"
   6
   7 static void movobj(struct obj *, int, int);
   8 #ifdef QUEST
   9 static bool rroom(int, int);
  10 #endif
  11 static int inv_cnt(void);
  12
  13 /* called on movement:
  14  * 1. when throwing ball+chain far away
  15  * 2. when teleporting
  16  * 3. when walking out of a lit room
  17  */
  18 void
  19 unsee(void)
  20 {
  21         int x, y;
  22         struct rm *lev;
  23
  24 #ifndef QUEST
  25         if (seehx)
  26                 seehx = 0;
  27         else
  28 #endif /* QUEST */
  29                 for (x = u.ux - 1; x < u.ux + 2; x++)
  30                         for (y = u.uy - 1; y < u.uy + 2; y++) {
  31                                 if (!isok(x, y))
  32                                         continue;
  33                                 lev = &levl[x][y];
  34                                 if (!lev->lit && lev->scrsym == '.') {
  35                                         lev->scrsym = ' ';
  36                                         lev->new = 1;
  37                                         on_scr(x, y);
  38                                 }
  39                         }
  40 }
  41
  42 /* called:
  43  *      in hack.eat.c: seeoff(0) - blind after eating rotten food
  44  *      in hack.mon.c: seeoff(0) - blinded by a yellow light
  45  *      in hack.mon.c: seeoff(1) - swallowed
  46  *      in hack.do.c:  seeoff(0) - blind after drinking potion
  47  *      in hack.do.c:  seeoff(1) - go up or down the stairs
  48  *      in hack.trap.c:seeoff(1) - fall through trapdoor
  49  * mode:
  50  * 1 to redo @, 0 to leave them *//* 1 means
  51  * misc movement, 0 means blindness
  52  */
  53 void
  54 seeoff(bool mode)
  55 {
  56         int x, y;
  57         struct rm *lev;
  58
  59         if (u.udispl && mode) {
  60                 u.udispl = 0;
  61                 levl[u.udisx][u.udisy].scrsym = news0(u.udisx, u.udisy);
  62         }
  63 #ifndef QUEST
  64         if (seehx)
  65                 seehx = 0;
  66         else
  67 #endif /* QUEST */
  68         if (!mode) {
  69                 for (x = u.ux - 1; x < u.ux + 2; x++)
  70                         for (y = u.uy - 1; y < u.uy + 2; y++) {
  71                                 if (!isok(x, y))
  72                                         continue;
  73                                 lev = &levl[x][y];
  74                                 if (!lev->lit && lev->scrsym == '.')
  75                                         lev->seen = 0;
  76                         }
  77         }
  78 }
  79
  80 void
  81 domove(void)
  82 {
  83         xchar oldx, oldy;
  84         struct monst *mtmp = NULL;
  85         struct rm *tmpr, *ust;
  86         struct trap *trap = NULL;
  87         struct obj *otmp;
  88
  89         u_wipe_engr(rnd(5));
  90
  91         if (inv_weight() > 0) {
  92                 pline("You collapse under your load.");
  93                 nomul(0);
  94                 return;
  95         }
  96         if (u.uswallow) {
  97                 u.dx = u.dy = 0;
  98                 u.ux = u.ustuck->mx;
  99                 u.uy = u.ustuck->my;
 100         } else {
 101                 if (Confusion) {
 102                         do {
 103                                 confdir();
 104                         } while (!isok(u.ux + u.dx, u.uy + u.dy) ||
 105                                IS_ROCK(levl[u.ux + u.dx][u.uy + u.dy].typ));
 106                 }
 107                 if (!isok(u.ux + u.dx, u.uy + u.dy)) {
 108                         nomul(0);
 109                         return;
 110                 }
 111         }
 112
 113         ust = &levl[u.ux][u.uy];
 114         oldx = u.ux;
 115         oldy = u.uy;
 116         if (!u.uswallow &&
 117             (trap = t_at(u.ux + u.dx, u.uy + u.dy)) && trap->tseen)
 118                 nomul(0);
 119         if (u.ustuck && !u.uswallow && (u.ux + u.dx != u.ustuck->mx ||
 120                                         u.uy + u.dy != u.ustuck->my)) {
 121                 if (dist(u.ustuck->mx, u.ustuck->my) > 2) {
 122                         /* perhaps it fled (or was teleported or ... ) */
 123                         u.ustuck = 0;
 124                 } else {
 125                         if (Blind)
 126                                 pline("You cannot escape from it!");
 127                         else
 128                                 pline("You cannot escape from %s!",
 129                                     monnam(u.ustuck));
 130                         nomul(0);
 131                         return;
 132                 }
 133         }
 134         if (u.uswallow || (mtmp = m_at(u.ux + u.dx, u.uy + u.dy))) {
 135                 /* attack monster */
 136
 137                 nomul(0);
 138                 gethungry();
 139                 if (multi < 0)          /* we just fainted */
 140                         return;
 141
 142                 /* try to attack; note that it might evade */
 143                 if (attack(u.uswallow ? u.ustuck : mtmp))
 144                         return;
 145         }
 146         /* not attacking an animal, so we try to move */
 147         if (u.utrap) {
 148                 if (u.utraptype == TT_PIT) {
 149                         pline("You are still in a pit.");
 150                         u.utrap--;
 151                 } else {
 152                         pline("You are caught in a beartrap.");
 153                         if ((u.dx && u.dy) || !rn2(5))
 154                                 u.utrap--;
 155                 }
 156                 return;
 157         }
 158         tmpr = &levl[u.ux + u.dx][u.uy + u.dy];
 159         if (IS_ROCK(tmpr->typ) ||
 160             (u.dx && u.dy && (tmpr->typ == DOOR || ust->typ == DOOR))) {
 161                 flags.move = 0;
 162                 nomul(0);
 163                 return;
 164         }
 165         while ((otmp = sobj_at(ENORMOUS_ROCK, u.ux + u.dx, u.uy + u.dy)) != NULL) {
 166                 struct trap *ttmp;
 167                 xchar rx = u.ux + 2 * u.dx, ry = u.uy + 2 * u.dy;
 168                 nomul(0);
 169                 if (isok(rx, ry) && !IS_ROCK(levl[rx][ry].typ) &&
 170                     (levl[rx][ry].typ != DOOR || !(u.dx && u.dy)) &&
 171                     !sobj_at(ENORMOUS_ROCK, rx, ry)) {
 172                         if (m_at(rx, ry)) {
 173                                 pline("You hear a monster behind the rock.");
 174                                 pline("Perhaps that's why you cannot move it.");
 175                                 goto cannot_push;
 176                         }
 177                         if ((ttmp = t_at(rx, ry)) != NULL)
 178                                 switch (ttmp->ttyp) {
 179                                 case PIT:
 180                                         pline("You push the rock into a pit!");
 181                                         deltrap(ttmp);
 182                                         delobj(otmp);
 183                                         pline("It completely fills the pit!");
 184                                         continue;
 185                                 case TELEP_TRAP:
 186                                         pline("You push the rock and suddenly it disappears!");
 187                                         delobj(otmp);
 188                                         continue;
 189                                 }
 190                         if (levl[rx][ry].typ == POOL) {
 191                                 levl[rx][ry].typ = ROOM;
 192                                 mnewsym(rx, ry);
 193                                 prl(rx, ry);
 194                                 pline("You push the rock into the water.");
 195                                 pline("Now you can cross the water!");
 196                                 delobj(otmp);
 197                                 continue;
 198                         }
 199                         otmp->ox = rx;
 200                         otmp->oy = ry;
 201                         if (cansee(rx, ry))
 202                                 atl(rx, ry, otmp->olet);
 203                         if (Invisible)
 204                                 newsym(u.ux + u.dx, u.uy + u.dy);
 205
 206                         {
 207                                 static long lastmovetime;
 208                           /* note: this var contains garbage initially and
 209                            * after a restore */
 210                                 if (moves > lastmovetime + 2 || moves < lastmovetime)
 211                                         pline("With great effort you move the enormous rock.");
 212                                 lastmovetime = moves;
 213                         }
 214                 } else {
 215                         pline("You try to move the enormous rock, but in vain.");
 216 cannot_push:
 217                         if ((!invent || inv_weight() + 90 <= 0) &&
 218                             (!u.dx || !u.dy ||
 219                              (IS_ROCK(levl[u.ux][u.uy + u.dy].typ)
 220                               && IS_ROCK(levl[u.ux + u.dx][u.uy].typ)))) {
 221                                 pline("However, you can squeeze yourself into a small opening.");
 222                                 break;
 223                         } else
 224                                 return;
 225                 }
 226         }
 227         if (u.dx && u.dy && IS_ROCK(levl[u.ux][u.uy + u.dy].typ) &&
 228             IS_ROCK(levl[u.ux + u.dx][u.uy].typ) &&
 229             invent && inv_weight() + 40 > 0) {
 230                 pline("You are carrying too much to get through.");
 231                 nomul(0);
 232                 return;
 233         }
 234         if (Punished &&
 235             DIST(u.ux + u.dx, u.uy + u.dy, uchain->ox, uchain->oy) > 2) {
 236                 if (carried(uball)) {
 237                         movobj(uchain, u.ux, u.uy);
 238                         goto nodrag;
 239                 }
 240
 241                 if (DIST(u.ux + u.dx, u.uy + u.dy, uball->ox, uball->oy) < 3) {
 242                         /* leave ball, move chain under/over ball */
 243                         movobj(uchain, uball->ox, uball->oy);
 244                         goto nodrag;
 245                 }
 246
 247                 if (inv_weight() + (int)uball->owt / 2 > 0) {
 248                         pline("You cannot %sdrag the heavy iron ball.",
 249                               invent ? "carry all that and also " : "");
 250                         nomul(0);
 251                         return;
 252                 }
 253
 254                 movobj(uball, uchain->ox, uchain->oy);
 255                 unpobj(uball);          /* BAH %% */
 256                 uchain->ox = u.ux;
 257                 uchain->oy = u.uy;
 258                 nomul(-2);
 259                 nomovemsg = "";
 260 nodrag: ;
 261         }
 262         u.ux += u.dx;
 263         u.uy += u.dy;
 264         if (flags.run) {
 265                 if (tmpr->typ == DOOR ||
 266                     (xupstair == u.ux && yupstair == u.uy) ||
 267                     (xdnstair == u.ux && ydnstair == u.uy))
 268                         nomul(0);
 269         }
 270
 271         if (tmpr->typ == POOL && !Levitation)
 272                 drown();        /* not necessarily fatal */
 273
 274         if (!Blind) {
 275 #ifdef QUEST
 276                 setsee();
 277 #else
 278                 if (ust->lit) {
 279                         if (tmpr->lit) {
 280                                 if (tmpr->typ == DOOR)
 281                                         prl1(u.ux + u.dx, u.uy + u.dy);
 282                                 else if (ust->typ == DOOR)
 283                                         nose1(oldx - u.dx, oldy - u.dy);
 284                         } else {
 285                                 unsee();
 286                                 prl1(u.ux + u.dx, u.uy + u.dy);
 287                         }
 288                 } else {
 289                         if (tmpr->lit)
 290                                 setsee();
 291                         else {
 292                                 prl1(u.ux + u.dx, u.uy + u.dy);
 293                                 if (tmpr->typ == DOOR) {
 294                                         if (u.dy) {
 295                                                 prl(u.ux - 1, u.uy);
 296                                                 prl(u.ux + 1, u.uy);
 297                                         } else {
 298                                                 prl(u.ux, u.uy - 1);
 299                                                 prl(u.ux, u.uy + 1);
 300                                         }
 301                                 }
 302                         }
 303                         nose1(oldx - u.dx, oldy - u.dy);
 304                 }
 305 #endif /* QUEST */
 306         } else
 307                 pru();
 308         if (!flags.nopick)
 309                 pickup(1);
 310         if (trap)
 311                 dotrap(trap);   /* fall into pit, arrow trap, etc. */
 312         inshop();
 313         if (!Blind)
 314                 read_engr_at(u.ux, u.uy);
 315 }
 316
 317 static void
 318 movobj(struct obj *obj, int ox, int oy)
 319 {
 320         /* Some dirty programming to get display right */
 321         freeobj(obj);
 322         unpobj(obj);
 323         obj->nobj = fobj;
 324         fobj = obj;
 325         obj->ox = ox;
 326         obj->oy = oy;
 327 }
 328
 329 int
 330 dopickup(void)
 331 {
 332         if (!g_at(u.ux, u.uy) && !o_at(u.ux, u.uy)) {
 333                 pline("There is nothing here to pick up.");
 334                 return (0);
 335         }
 336         if (Levitation) {
 337                 pline("You cannot reach the floor.");
 338                 return (1);
 339         }
 340         pickup(0);
 341         return (1);
 342 }
 343
 344 void
 345 pickup(int all)
 346 {
 347         struct gold *gold;
 348         struct obj *obj, *obj2;
 349         int wt;
 350
 351         if (Levitation)
 352                 return;
 353         while ((gold = g_at(u.ux, u.uy))) {
 354                 pline("%ld gold piece%s.", gold->amount, plur(gold->amount));
 355                 u.ugold += gold->amount;
 356                 flags.botl = 1;
 357                 freegold(gold);
 358                 if (flags.run)
 359                         nomul(0);
 360                 if (Invisible)
 361                         newsym(u.ux, u.uy);
 362         }
 363
 364         /* check for more than one object */
 365         if (!all) {
 366                 int ct = 0;
 367
 368                 for (obj = fobj; obj; obj = obj->nobj)
 369                         if (obj->ox == u.ux && obj->oy == u.uy)
 370                                 if (!Punished || obj != uchain)
 371                                         ct++;
 372                 if (ct < 2)
 373                         all++;
 374                 else
 375                         pline("There are several objects here.");
 376         }
 377
 378         for (obj = fobj; obj; obj = obj2) {
 379                 obj2 = obj->nobj;       /* perhaps obj will be picked up */
 380                 if (obj->ox == u.ux && obj->oy == u.uy) {
 381                         if (flags.run)
 382                                 nomul(0);
 383
 384                         /* do not pick up uchain */
 385                         if (Punished && obj == uchain)
 386                                 continue;
 387
 388                         if (!all) {
 389                                 char c;
 390
 391                                 pline("Pick up %s ? [ynaq]", doname(obj));
 392                                 while (!strchr("ynaq ", (c = readchar())))
 393                                         bell();
 394                                 if (c == 'q')
 395                                         return;
 396                                 if (c == 'n')
 397                                         continue;
 398                                 if (c == 'a')
 399                                         all = 1;
 400                         }
 401
 402                         if (obj->otyp == DEAD_COCKATRICE && !uarmg) {
 403                                 pline("Touching the dead cockatrice is a fatal mistake.");
 404                                 pline("You turn to stone.");
 405                                 killer = "cockatrice cadaver";
 406                                 done("died");
 407                         }
 408
 409                         if (obj->otyp == SCR_SCARE_MONSTER) {
 410                                 if (!obj->spe)
 411                                         obj->spe = 1;
 412                                 else {
 413                                         /* Note: perhaps the 1st pickup failed: you cannot
 414                                          *  carry anymore, and so we never dropped it -
 415                                          *  let's assume that treading on it twice also
 416                                          *  destroys the scroll */
 417                                         pline("The scroll turns to dust as you pick it up.");
 418                                         delobj(obj);
 419                                         continue;
 420                                 }
 421                         }
 422
 423                         wt = inv_weight() + obj->owt;
 424                         if (wt > 0) {
 425                                 if (obj->quan > 1) {
 426                                         /* see how many we can lift */
 427                                         int savequan = obj->quan;
 428                                         int iw = inv_weight();
 429                                         int qq;
 430                                         for (qq = 1; qq < savequan; qq++) {
 431                                                 obj->quan = qq;
 432                                                 if (iw + weight(obj) > 0)
 433                                                         break;
 434                                         }
 435                                         obj->quan = savequan;
 436                                         qq--;
 437                                         /* we can carry qq of them */
 438                                         if (!qq)
 439                                                 goto too_heavy;
 440                                         pline("You can only carry %s of the %s lying here.",
 441                                             (qq == 1) ? "one" : "some",
 442                                             doname(obj));
 443                                         splitobj(obj, qq);
 444                                         /* note: obj2 is set already, so we'll never
 445                                          * encounter the other half; if it should be
 446                                          * otherwise then write
 447                                          *      obj2 = splitobj(obj, qq);
 448                                          */
 449                                         goto lift_some;
 450                                 }
 451 too_heavy:
 452                                 pline("There %s %s here, but %s.",
 453                                       (obj->quan == 1) ? "is" : "are",
 454                                       doname(obj),
 455                                       !invent ? "it is too heavy for you to lift"
 456                                       : "you cannot carry anymore");
 457                                 break;
 458                         }
 459 lift_some:
 460                         if (inv_cnt() >= 52) {
 461                                 pline("Your knapsack cannot accommodate anymore items.");
 462                                 break;
 463                         }
 464                         if (wt > -5)
 465                                 pline("You have a little trouble lifting");
 466                         freeobj(obj);
 467                         if (Invisible)
 468                                 newsym(u.ux, u.uy);
 469                         addtobill(obj); /* sets obj->unpaid if necessary */
 470                         {
 471                                 int pickquan = obj->quan;
 472                                 int mergquan;
 473                                 if (!Blind)             /* this is done by prinv(), */
 474                                         obj->dknown = 1;/* but addinv() needs it */
 475                                                         /* already for merging */
 476                                 obj = addinv(obj);      /* might merge it with other objects */
 477                                 mergquan = obj->quan;
 478                                 obj->quan = pickquan;   /* to fool prinv() */
 479                                 prinv(obj);
 480                                 obj->quan = mergquan;
 481                         }
 482                 }
 483         }
 484 }
 485
 486 /* stop running if we see something interesting */
 487 /* turn around a corner if that is the only way we can proceed */
 488 /* do not turn left or right twice */
 489 void
 490 lookaround(void)
 491 {
 492         int x, y, i, x0, y0, m0, i0 = 9;
 493         int corrct = 0, noturn = 0;
 494         struct monst *mtmp;
 495
 496         /* suppress "used before set" message */
 497         x0 = y0 = m0 = 0;
 498         if (Blind || flags.run == 0)
 499                 return;
 500         if (flags.run == 1 && levl[u.ux][u.uy].typ == ROOM)
 501                 return;
 502 #ifdef QUEST
 503         if (u.ux0 == u.ux + u.dx && u.uy0 == u.uy + u.dy)
 504                 goto stop;
 505 #endif /* QUEST */
 506         for (x = u.ux - 1; x <= u.ux + 1; x++)
 507                 for (y = u.uy - 1; y <= u.uy + 1; y++) {
 508                         if (x == u.ux && y == u.uy)
 509                                 continue;
 510                         if (!levl[x][y].typ)
 511                                 continue;
 512                         if ((mtmp = m_at(x, y)) && !mtmp->mimic &&
 513                             (!mtmp->minvis || See_invisible)) {
 514                                 if (!mtmp->mtame ||
 515                                     (x == u.ux + u.dx && y == u.uy + u.dy))
 516                                         goto stop;
 517                         } else          /* invisible M cannot influence us */
 518                                 mtmp = NULL;
 519                         if (x == u.ux - u.dx && y == u.uy - u.dy)
 520                                 continue;
 521                         switch (levl[x][y].scrsym) {
 522                         case '|':
 523                         case '-':
 524                         case '.':
 525                         case ' ':
 526                                 break;
 527                         case '+':
 528                                 if (x != u.ux && y != u.uy)
 529                                         break;
 530                                 if (flags.run != 1)
 531                                         goto stop;
 532                         /* fall into next case */
 533                         case CORR_SYM:
 534 corr:
 535                                 if (flags.run == 1 || flags.run == 3) {
 536                                         i = DIST(x, y, u.ux + u.dx, u.uy + u.dy);
 537                                         if (i > 2)
 538                                                 break;
 539                                         if (corrct == 1 &&
 540                                             DIST(x, y, x0, y0) != 1)
 541                                                 noturn = 1;
 542                                         if (i < i0) {
 543                                                 i0 = i;
 544                                                 x0 = x;
 545                                                 y0 = y;
 546                                                 m0 = mtmp ? 1 : 0;
 547                                         }
 548                                 }
 549                                 corrct++;
 550                                 break;
 551                         case '^':
 552                                 if (flags.run == 1)     /* if you must */
 553                                         goto corr;
 554                                 if (x == u.ux + u.dx && y == u.uy + u.dy)
 555                                         goto stop;
 556                                 break;
 557                         default:        /* e.g. objects or trap or stairs */
 558                                 if (flags.run == 1)
 559                                         goto corr;
 560                                 if (mtmp)       /* d */
 561                                         break;
 562 stop:
 563                                 nomul(0);
 564                                 return;
 565                         }
 566                 }
 567 #ifdef QUEST
 568         if (corrct > 0 && (flags.run == 4 || flags.run == 5))
 569                 goto stop;
 570 #endif /* QUEST */
 571         if (corrct > 1 && flags.run == 2)
 572                 goto stop;
 573         if ((flags.run == 1 || flags.run == 3) && !noturn && !m0 && i0 &&
 574             (corrct == 1 || (corrct == 2 && i0 == 1))) {
 575                 /* make sure that we do not turn too far */
 576                 if (i0 == 2) {
 577                         if (u.dx == y0 - u.uy && u.dy == u.ux - x0)
 578                                 i = 2;  /* straight turn right */
 579                         else
 580                                 i = -2; /* straight turn left */
 581                 } else if (u.dx && u.dy) {
 582                         if ((u.dx == u.dy && y0 == u.uy) ||
 583                             (u.dx != u.dy && y0 != u.uy))
 584                                 i = -1; /* half turn left */
 585                         else
 586                                 i = 1;  /* half turn right */
 587                 } else {
 588                         if ((x0 - u.ux == y0 - u.uy && !u.dy) ||
 589                             (x0 - u.ux != y0 - u.uy && u.dy))
 590                                 i = 1;  /* half turn right */
 591                         else
 592                                 i = -1; /* half turn left */
 593                 }
 594                 i += u.last_str_turn;
 595                 if (i <= 2 && i >= -2) {
 596                         u.last_str_turn = i;
 597                         u.dx = x0 - u.ux, u.dy = y0 - u.uy;
 598                 }
 599         }
 600 }
 601
 602 /* something like lookaround, but we are not running */
 603 /* react only to monsters that might hit us */
 604 bool
 605 monster_nearby(void)
 606 {
 607         int x, y;
 608         struct monst *mtmp;
 609
 610         if (!Blind)
 611                 for (x = u.ux - 1; x <= u.ux + 1; x++)
 612                         for (y = u.uy - 1; y <= u.uy + 1; y++) {
 613                                 if (x == u.ux && y == u.uy)
 614                                         continue;
 615                                 if ((mtmp = m_at(x, y)) && !mtmp->mimic &&
 616                                     !mtmp->mtame &&
 617                                     !mtmp->mpeaceful &&
 618                                     !strchr("Ea", mtmp->data->mlet) &&
 619                                     !mtmp->mfroz && !mtmp->msleep && /* aplvax!jcn */
 620                                     (!mtmp->minvis || See_invisible))
 621                                         return (1);
 622                         }
 623         return (0);
 624 }
 625
 626 #ifdef QUEST
 627 bool
 628 cansee(xchar x, xchar y)
 629 {
 630         int dx, dy, adx, ady, sdx, sdy, dmax, d;
 631
 632         if (Blind)
 633                 return (0);
 634         if (!isok(x, y))
 635                 return (0);
 636         d = dist(x, y);
 637         if (d < 3)
 638                 return (1);
 639         if (d > u.uhorizon * u.uhorizon)
 640                 return (0);
 641         if (!levl[x][y].lit)
 642                 return (0);
 643         dx = x - u.ux;
 644         adx = abs(dx);
 645         sdx = sgn(dx);
 646         dy = y - u.uy;
 647         ady = abs(dy);
 648         sdy = sgn(dy);
 649         if (dx == 0 || dy == 0 || adx == ady) {
 650                 dmax = (dx == 0) ? ady : adx;
 651                 for (d = 1; d <= dmax; d++)
 652                         if (!rroom(sdx * d, sdy * d))
 653                                 return (0);
 654                 return (1);
 655         } else if (ady > adx) {
 656                 for (d = 1; d <= ady; d++) {
 657                         if (!rroom(sdx * ((d * adx) / ady), sdy * d) ||
 658                             !rroom(sdx * ((d * adx - 1) / ady + 1), sdy * d))
 659                                 return (0);
 660                 }
 661                 return (1);
 662         } else {
 663                 for (d = 1; d <= adx; d++) {
 664                         if (!rroom(sdx * d, sdy * ((d * ady) / adx)) ||
 665                             !rroom(sdx * d, sdy * ((d * ady - 1) / adx + 1)))
 666                                 return (0);
 667                 }
 668                 return (1);
 669         }
 670 }
 671
 672 static bool
 673 rroom(int x, int y)
 674 {
 675         return (IS_ROOM(levl[u.ux + x][u.uy + y].typ));
 676 }
 677
 678 #else
 679
 680 bool
 681 cansee(xchar x, xchar y)
 682 {
 683         if (Blind || u.uswallow)
 684                 return (0);
 685         if (dist(x, y) < 3)
 686                 return (1);
 687         if (levl[x][y].lit && seelx <= x && x <= seehx && seely <= y &&
 688             y <= seehy)
 689                 return (1);
 690         return (0);
 691 }
 692 #endif /* QUEST */
 693
 694 int
 695 sgn(int a)
 696 {
 697         return ((a > 0) ? 1 : (a == 0) ? 0 : -1);
 698 }
 699
 700 #ifdef QUEST
 701 void
 702 setsee(void)
 703 {
 704         int x, y;
 705
 706         if (Blind) {
 707                 pru();
 708                 return;
 709         }
 710         for (y = u.uy - u.uhorizon; y <= u.uy + u.uhorizon; y++)
 711                 for (x = u.ux - u.uhorizon; x <= u.ux + u.uhorizon; x++) {
 712                         if (cansee(x, y))
 713                                 prl(x, y);
 714                 }
 715 }
 716
 717 #else
 718
 719 void
 720 setsee(void)
 721 {
 722         int x, y;
 723
 724         if (Blind) {
 725                 pru();
 726                 return;
 727         }
 728         if (!levl[u.ux][u.uy].lit) {
 729                 seelx = u.ux - 1;
 730                 seehx = u.ux + 1;
 731                 seely = u.uy - 1;
 732                 seehy = u.uy + 1;
 733         } else {
 734                 for (seelx = u.ux; levl[seelx - 1][u.uy].lit; seelx--) ;
 735                 for (seehx = u.ux; levl[seehx + 1][u.uy].lit; seehx++) ;
 736                 for (seely = u.uy; levl[u.ux][seely - 1].lit; seely--) ;
 737                 for (seehy = u.uy; levl[u.ux][seehy + 1].lit; seehy++) ;
 738         }
 739         for (y = seely; y <= seehy; y++)
 740                 for (x = seelx; x <= seehx; x++)
 741                         prl(x, y);
 742
 743         if (!levl[u.ux][u.uy].lit)      /* seems necessary elsewhere */
 744                 seehx = 0;
 745         else {
 746                 if (seely == u.uy)
 747                         for (x = u.ux - 1; x <= u.ux + 1; x++)
 748                                 prl(x, seely - 1);
 749                 if (seehy == u.uy)
 750                         for (x = u.ux - 1; x <= u.ux + 1; x++)
 751                                 prl(x, seehy + 1);
 752                 if (seelx == u.ux)
 753                         for (y = u.uy - 1; y <= u.uy + 1; y++)
 754                                 prl(seelx - 1, y);
 755                 if (seehx == u.ux)
 756                         for (y = u.uy - 1; y <= u.uy + 1; y++)
 757                                 prl(seehx + 1, y);
 758         }
 759 }
 760 #endif /* QUEST */
 761
 762 void
 763 nomul(int nval)
 764 {
 765         if (multi < 0)
 766                 return;
 767         multi = nval;
 768         flags.mv = flags.run = 0;
 769 }
 770
 771 int
 772 abon(void)
 773 {
 774         if (u.ustr == 3)
 775                 return (-3);
 776         else if (u.ustr < 6)
 777                 return (-2);
 778         else if (u.ustr < 8)
 779                 return (-1);
 780         else if (u.ustr < 17)
 781                 return (0);
 782         else if (u.ustr < 69)   /* up to 18/50 */
 783                 return (1);
 784         else if (u.ustr < 118)
 785                 return (2);
 786         else
 787                 return (3);
 788 }
 789
 790 int
 791 dbon(void)
 792 {
 793         if (u.ustr < 6)
 794                 return (-1);
 795         else if (u.ustr < 16)
 796                 return (0);
 797         else if (u.ustr < 18)
 798                 return (1);
 799         else if (u.ustr == 18)  /* up to 18 */
 800                 return (2);
 801         else if (u.ustr < 94)   /* up to 18/75 */
 802                 return (3);
 803         else if (u.ustr < 109)  /* up to 18/90 */
 804                 return (4);
 805         else if (u.ustr < 118)  /* up to 18/99 */
 806                 return (5);
 807         else
 808                 return (6);
 809 }
 810
 811 /* may kill you; cause may be poison or monster like 'A' */
 812 void
 813 losestr(int num)
 814 {
 815         u.ustr -= num;
 816         while (u.ustr < 3) {
 817                 u.ustr++;
 818                 u.uhp -= 6;
 819                 u.uhpmax -= 6;
 820         }
 821         flags.botl = 1;
 822 }
 823
 824 void
 825 losehp(int n, const char *knam)
 826 {
 827         u.uhp -= n;
 828         if (u.uhp > u.uhpmax)
 829                 u.uhpmax = u.uhp;       /* perhaps n was negative */
 830         flags.botl = 1;
 831         if (u.uhp < 1) {
 832                 killer = knam;          /* the thing that killed you */
 833                 done("died");
 834         }
 835 }
 836
 837 void
 838 losehp_m(int n, struct monst *mtmp)
 839 {
 840         u.uhp -= n;
 841         flags.botl = 1;
 842         if (u.uhp < 1)
 843                 done_in_by(mtmp);
 844 }
 845
 846 void
 847 losexp(void)    /* hit by V or W */
 848 {
 849         int num;
 850
 851         if (u.ulevel > 1)
 852                 pline("Goodbye level %u.", u.ulevel--);
 853         else
 854                 u.uhp = -1;
 855         num = rnd(10);
 856         u.uhp -= num;
 857         u.uhpmax -= num;
 858         u.uexp = newuexp();
 859         flags.botl = 1;
 860 }
 861
 862 int
 863 inv_weight(void)
 864 {
 865         struct obj *otmp = invent;
 866         int wt = (u.ugold + 500) / 1000;
 867         int carrcap;
 868
 869         if (Levitation)         /* pugh@cornell */
 870                 carrcap = MAX_CARR_CAP;
 871         else {
 872                 carrcap = 5 * (((u.ustr > 18) ? 20 : u.ustr) + u.ulevel);
 873                 if (carrcap > MAX_CARR_CAP)
 874                         carrcap = MAX_CARR_CAP;
 875                 if (Wounded_legs & LEFT_SIDE)
 876                         carrcap -= 10;
 877                 if (Wounded_legs & RIGHT_SIDE)
 878                         carrcap -= 10;
 879         }
 880         while (otmp) {
 881                 wt += otmp->owt;
 882                 otmp = otmp->nobj;
 883         }
 884         return (wt - carrcap);
 885 }
 886
 887 static int
 888 inv_cnt(void)
 889 {
 890         struct obj *otmp = invent;
 891         int ct = 0;
 892
 893         while (otmp) {
 894                 ct++;
 895                 otmp = otmp->nobj;
 896         }
 897         return (ct);
 898 }
 899
 900 long
 901 newuexp(void)
 902 {
 903         return (10 * (1L << (u.ulevel - 1)));
 904 }