games/hack/hack.shk.c

   1 /* Copyright (c) Stichting Mathematisch Centrum, Amsterdam, 1985. */
   2 /* hack.shk.c - version 1.0.3 */
   3 /* $FreeBSD: src/games/hack/hack.shk.c,v 1.5 1999/11/16 10:26:37 marcel Exp $ */
   4 /* $DragonFly: src/games/hack/hack.shk.c,v 1.6 2006/08/21 19:45:32 pavalos Exp $ */
   5
   6 #include "hack.h"
   7 #ifdef QUEST
   8 int shlevel = 0;
   9 struct monst *shopkeeper = 0;
  10 struct obj *billobjs = 0;
  11
  12 void
  13 obfree(struct obj *obj, struct obj *merge)
  14 {
  15         free(obj);
  16 }
  17
  18 int
  19 inshop(void)
  20 {
  21         return (0);
  22 }
  23
  24 void
  25 shopdig(void)
  26 {
  27 }
  28
  29 void
  30 addtobill(void)
  31 {
  32 }
  33
  34 void
  35 subfrombill(void)
  36 {
  37 }
  38
  39 void
  40 splitbill(void)
  41 {
  42 }
  43
  44 int
  45 dopay(void)
  46 {
  47         return (0);
  48 }
  49
  50 void
  51 paybill(void)
  52 {
  53 }
  54
  55 int
  56 doinvbill(void)
  57 {
  58         return (0);
  59 }
  60
  61 void
  62 shkdead(void)
  63 {
  64 }
  65
  66 int
  67 shkcatch(void)
  68 {
  69         return (0);
  70 }
  71
  72 int
  73 shk_move(void)
  74 {
  75         return (0);
  76 }
  77
  78 void
  79 replshk(struct monst *mtmp, struct monst *mtmp2)
  80 {
  81 }
  82
  83 const char *
  84 shkname(void)
  85 {
  86         return ("");
  87 }
  88
  89 #else /* QUEST */
  90 #include "hack.mfndpos.h"
  91 #include "def.eshk.h"
  92
  93 #define ESHK(mon)       ((struct eshk *)(&(mon->mextra[0])))
  94 #define NOTANGRY(mon)   mon->mpeaceful
  95 #define ANGRY(mon)      !NOTANGRY(mon)
  96
  97 /* Descriptor of current shopkeeper. Note that the bill need not be
  98  * per-shopkeeper, since it is valid only when in a shop. */
  99 static struct monst *shopkeeper = 0;
 100 static struct bill_x *bill;
 101 static int shlevel = 0;         /* level of this shopkeeper */
 102 struct obj *billobjs;           /* objects on bill with bp->useup */
 103                                 /* only accessed here and by save & restore */
 104 static long int total;          /* filled by addupbill() */
 105 static long int followmsg;      /* last time of follow message */
 106
 107 /*
 108  *      invariants: obj->unpaid iff onbill(obj) [unless bp->useup]
 109  *              obj->quan <= bp->bquan
 110  */
 111
 112 char shtypes[] = {      /* 8 shoptypes: 7 specialized, 1 mixed */
 113         RING_SYM, WAND_SYM, WEAPON_SYM, FOOD_SYM, SCROLL_SYM,
 114         POTION_SYM, ARMOR_SYM, 0
 115 };
 116
 117 static const char *shopnam[] = {
 118         "engagement ring", "walking cane", "antique weapon",
 119         "delicatessen", "second hand book", "liquor",
 120         "used armor", "assorted antiques"
 121 };
 122
 123 static void              setpaid(void);
 124 static void              addupbill(void);
 125 static void              findshk(int);
 126 static struct bill_x    *onbill(struct obj *);
 127 static void              pay(long, struct monst *);
 128 static int               dopayobj(struct bill_x *);
 129 static struct obj       *bp_to_obj(struct bill_x *);
 130 static int               getprice(struct obj *);
 131 static int               realhunger(void);
 132
 133 char *
 134 shkname(struct monst *mtmp)             /* called in do_name.c */
 135 {
 136         return (ESHK(mtmp)->shknam);
 137 }
 138
 139 void
 140 shkdead(struct monst *mtmp)             /* called in mon.c */
 141 {
 142         struct eshk *eshk = ESHK(mtmp);
 143
 144         if (eshk->shoplevel == dlevel)
 145                 rooms[eshk->shoproom].rtype = 0;
 146         if (mtmp == shopkeeper) {
 147                 setpaid();
 148                 shopkeeper = 0;
 149                 bill = (struct bill_x *) - 1000; /* dump core when referenced */
 150         }
 151 }
 152
 153 void
 154 replshk(struct monst *mtmp, struct monst *mtmp2)
 155 {
 156         if (mtmp == shopkeeper) {
 157                 shopkeeper = mtmp2;
 158                 bill = &(ESHK(shopkeeper)->bill[0]);
 159         }
 160 }
 161
 162 static void
 163 setpaid(void)   /* caller has checked that shopkeeper exists */
 164                 /* either we paid or left the shop or he just died */
 165 {
 166         struct obj *obj;
 167         struct monst *mtmp;
 168
 169         for (obj = invent; obj; obj = obj->nobj)
 170                 obj->unpaid = 0;
 171         for (obj = fobj; obj; obj = obj->nobj)
 172                 obj->unpaid = 0;
 173         for (obj = fcobj; obj; obj = obj->nobj)
 174                 obj->unpaid = 0;
 175         for (mtmp = fmon; mtmp; mtmp = mtmp->nmon)
 176                 for (obj = mtmp->minvent; obj; obj = obj->nobj)
 177                         obj->unpaid = 0;
 178         for (mtmp = fallen_down; mtmp; mtmp = mtmp->nmon)
 179                 for (obj = mtmp->minvent; obj; obj = obj->nobj)
 180                         obj->unpaid = 0;
 181         while ((obj = billobjs) != NULL) {
 182                 billobjs = obj->nobj;
 183                 free(obj);
 184         }
 185         ESHK(shopkeeper)->billct = 0;
 186 }
 187
 188 static void
 189 addupbill(void)         /* delivers result in total */
 190                         /* caller has checked that shopkeeper exists */
 191 {
 192         int ct = ESHK(shopkeeper)->billct;
 193         struct bill_x *bp = bill;
 194
 195         total = 0;
 196         while (ct--) {
 197                 total += bp->price * bp->bquan;
 198                 bp++;
 199         }
 200 }
 201
 202 int
 203 inshop(void)
 204 {
 205         int roomno = inroom(u.ux, u.uy);
 206
 207         /* Did we just leave a shop? */
 208         if (u.uinshop &&
 209             (u.uinshop != roomno + 1 || shlevel != dlevel || !shopkeeper)) {
 210                 if (shopkeeper) {
 211                         if (ESHK(shopkeeper)->billct) {
 212                                 if (inroom(shopkeeper->mx, shopkeeper->my)
 213                                     == u.uinshop - 1)   /* ab@unido */
 214                                         pline("Somehow you escaped the shop without paying!");
 215                                 addupbill();
 216                                 pline("You stole for a total worth of %ld zorkmids.",
 217                                     total);
 218                                 ESHK(shopkeeper)->robbed += total;
 219                                 setpaid();
 220                                 if ((rooms[ESHK(shopkeeper)->shoproom].rtype == GENERAL)
 221                                     == (rn2(3) == 0))
 222                                         ESHK(shopkeeper)->following = 1;
 223                         }
 224                         shopkeeper = 0;
 225                         shlevel = 0;
 226                 }
 227                 u.uinshop = 0;
 228         }
 229
 230         /* Did we just enter a zoo of some kind? */
 231         if (roomno >= 0) {
 232                 int rt = rooms[roomno].rtype;
 233                 struct monst *mtmp;
 234                 if (rt == ZOO)
 235                         pline("Welcome to David's treasure zoo!");
 236                 else if (rt == SWAMP)
 237                         pline("It looks rather muddy down here.");
 238                 else if (rt == MORGUE) {
 239                         if (midnight())
 240                                 pline("Go away! Go away!");
 241                         else
 242                                 pline("You get an uncanny feeling ...");
 243                 } else
 244                         rt = 0;
 245                 if (rt != 0) {
 246                         rooms[roomno].rtype = 0;
 247                         for (mtmp = fmon; mtmp; mtmp = mtmp->nmon)
 248                                 if (rt != ZOO || !rn2(3))
 249                                         mtmp->msleep = 0;
 250                 }
 251         }
 252
 253         /* Did we just enter a shop? */
 254         if (roomno >= 0 && rooms[roomno].rtype >= 8) {
 255                 if (shlevel != dlevel || !shopkeeper
 256                     || ESHK(shopkeeper)->shoproom != roomno)
 257                         findshk(roomno);
 258                 if (!shopkeeper) {
 259                         rooms[roomno].rtype = 0;
 260                         u.uinshop = 0;
 261                 } else if (!u.uinshop) {
 262                         if (!ESHK(shopkeeper)->visitct ||
 263                             strncmp(ESHK(shopkeeper)->customer, plname, PL_NSIZ)) {
 264                                 /* He seems to be new here */
 265                                 ESHK(shopkeeper)->visitct = 0;
 266                                 ESHK(shopkeeper)->following = 0;
 267                                 strncpy(ESHK(shopkeeper)->customer, plname, PL_NSIZ);
 268                                 NOTANGRY(shopkeeper) = 1;
 269                         }
 270                         if (!ESHK(shopkeeper)->following) {
 271                                 boolean box, pick;
 272
 273                                 pline("Hello %s! Welcome%s to %s's %s shop!",
 274                                       plname,
 275                                       ESHK(shopkeeper)->visitct++ ? " again" : "",
 276                                       shkname(shopkeeper),
 277                                       shopnam[rooms[ESHK(shopkeeper)->shoproom].rtype - 8]);
 278                                 box = carrying(ICE_BOX);
 279                                 pick = carrying(PICK_AXE);
 280                                 if (box || pick) {
 281                                         if (dochug(shopkeeper)) {
 282                                                 u.uinshop = 0;  /* he died moving */
 283                                                 return (0);
 284                                         }
 285                                         pline("Will you please leave your %s outside?",
 286                                             (box && pick) ? "box and pick-axe" :
 287                                             box ? "box" : "pick-axe");
 288                                 }
 289                         }
 290                         u.uinshop = roomno + 1;
 291                 }
 292         }
 293         return (u.uinshop);
 294 }
 295
 296 static void
 297 findshk(int roomno)
 298 {
 299         struct monst *mtmp;
 300
 301         for (mtmp = fmon; mtmp; mtmp = mtmp->nmon)
 302                 if (mtmp->isshk && ESHK(mtmp)->shoproom == roomno
 303                     && ESHK(mtmp)->shoplevel == dlevel) {
 304                         shopkeeper = mtmp;
 305                         bill = &(ESHK(shopkeeper)->bill[0]);
 306                         shlevel = dlevel;
 307                         if (ANGRY(shopkeeper) &&
 308                             strncmp(ESHK(shopkeeper)->customer, plname, PL_NSIZ))
 309                                 NOTANGRY(shopkeeper) = 1;
 310                         /* billobjs = 0; -- this is wrong if we save in a shop */
 311                         /* (and it is harmless to have too many things in billobjs) */
 312                         return;
 313                 }
 314         shopkeeper = 0;
 315         shlevel = 0;
 316         bill = (struct bill_x *) - 1000;        /* dump core when referenced */
 317 }
 318
 319 static struct bill_x *
 320 onbill(struct obj *obj)
 321 {
 322         struct bill_x *bp;
 323
 324         if (!shopkeeper)
 325                 return (0);
 326         for (bp = bill; bp < &bill[ESHK(shopkeeper)->billct]; bp++)
 327                 if (bp->bo_id == obj->o_id) {
 328                         if (!obj->unpaid)
 329                                 pline("onbill: paid obj on bill?");
 330                         return (bp);
 331                 }
 332         if (obj->unpaid)
 333                 pline("onbill: unpaid obj not on bill?");
 334         return (0);
 335 }
 336
 337 /* called with two args on merge */
 338 void
 339 obfree(struct obj *obj, struct obj *merge)
 340 {
 341         struct bill_x *bp = onbill(obj);
 342         struct bill_x *bpm;
 343
 344         if (bp) {
 345                 if (!merge) {
 346                         bp->useup = 1;
 347                         obj->unpaid = 0;        /* only for doinvbill */
 348                         obj->nobj = billobjs;
 349                         billobjs = obj;
 350                         return;
 351                 }
 352                 bpm = onbill(merge);
 353                 if (!bpm) {
 354                         /* this used to be a rename */
 355                         impossible("obfree: not on bill??");
 356                         return;
 357                 } else {
 358                         /* this was a merger */
 359                         bpm->bquan += bp->bquan;
 360                         ESHK(shopkeeper)->billct--;
 361                         *bp = bill[ESHK(shopkeeper)->billct];
 362                 }
 363         }
 364         free(obj);
 365 }
 366
 367 static void
 368 pay(long tmp, struct monst *shkp)
 369 {
 370         long robbed = ESHK(shkp)->robbed;
 371
 372         u.ugold -= tmp;
 373         shkp->mgold += tmp;
 374         flags.botl = 1;
 375         if (robbed) {
 376                 robbed -= tmp;
 377                 if (robbed < 0)
 378                         robbed = 0;
 379                 ESHK(shkp)->robbed = robbed;
 380         }
 381 }
 382
 383 int
 384 dopay(void)
 385 {
 386         long ltmp;
 387         struct bill_x *bp;
 388         struct monst *shkp;
 389         int pass, tmp;
 390
 391         multi = 0;
 392         inshop();
 393         for (shkp = fmon; shkp; shkp = shkp->nmon)
 394                 if (shkp->isshk && dist(shkp->mx, shkp->my) < 3)
 395                         break;
 396         if (!shkp && u.uinshop &&
 397             inroom(shopkeeper->mx, shopkeeper->my) == ESHK(shopkeeper)->shoproom)
 398                 shkp = shopkeeper;
 399
 400         if (!shkp) {
 401                 pline("There is nobody here to receive your payment.");
 402                 return (0);
 403         }
 404         ltmp = ESHK(shkp)->robbed;
 405         if (shkp != shopkeeper && NOTANGRY(shkp)) {
 406                 if (!ltmp)
 407                         pline("You do not owe %s anything.", monnam(shkp));
 408                 else if (!u.ugold)
 409                         pline("You have no money.");
 410                 else {
 411                         long ugold = u.ugold;
 412
 413                         if (u.ugold > ltmp) {
 414                                 pline("You give %s the %ld gold pieces he asked for.",
 415                                     monnam(shkp), ltmp);
 416                                 pay(ltmp, shkp);
 417                         } else {
 418                                 pline("You give %s all your gold.", monnam(shkp));
 419                                 pay(u.ugold, shkp);
 420                         }
 421                         if (ugold < ltmp / 2)
 422                                 pline("Unfortunately, he doesn't look satisfied.");
 423                         else {
 424                                 ESHK(shkp)->robbed = 0;
 425                                 ESHK(shkp)->following = 0;
 426                                 if (ESHK(shkp)->shoplevel != dlevel) {
 427                                         /* For convenience's sake, let him disappear */
 428                                         shkp->minvent = 0;      /* %% */
 429                                         shkp->mgold = 0;
 430                                         mondead(shkp);
 431                                 }
 432                         }
 433                 }
 434                 return (1);
 435         }
 436
 437         if (!ESHK(shkp)->billct) {
 438                 pline("You do not owe %s anything.", monnam(shkp));
 439                 if (!u.ugold) {
 440                         pline("Moreover, you have no money.");
 441                         return (1);
 442                 }
 443                 if (ESHK(shkp)->robbed) {
 444 #define min(a, b)       ((a < b) ? a : b)
 445                         pline("But since his shop has been robbed recently,");
 446                         pline("you %srepay %s's expenses.",
 447                             (u.ugold < ESHK(shkp)->robbed) ? "partially " : "",
 448                             monnam(shkp));
 449                         pay(min(u.ugold, ESHK(shkp)->robbed), shkp);
 450                         ESHK(shkp)->robbed = 0;
 451                         return (1);
 452                 }
 453                 if (ANGRY(shkp)) {
 454                         pline("But in order to appease %s,",
 455                               amonnam(shkp, "angry"));
 456                         if (u.ugold >= 1000) {
 457                                 ltmp = 1000;
 458                                 pline(" you give him 1000 gold pieces.");
 459                         } else {
 460                                 ltmp = u.ugold;
 461                                 pline(" you give him all your money.");
 462                         }
 463                         pay(ltmp, shkp);
 464                         if (strncmp(ESHK(shkp)->customer, plname, PL_NSIZ)
 465                             || rn2(3)) {
 466                                 pline("%s calms down.", Monnam(shkp));
 467                                 NOTANGRY(shkp) = 1;
 468                         } else
 469                                 pline("%s is as angry as ever.", Monnam(shkp));
 470                 }
 471                 return (1);
 472         }
 473         if (shkp != shopkeeper) {
 474                 impossible("dopay: not to shopkeeper?");
 475                 if (shopkeeper)
 476                         setpaid();
 477                 return (0);
 478         }
 479         for (pass = 0; pass <= 1; pass++) {
 480                 tmp = 0;
 481                 while (tmp < ESHK(shopkeeper)->billct) {
 482                         bp = &bill[tmp];
 483                         if (!pass && !bp->useup) {
 484                                 tmp++;
 485                                 continue;
 486                         }
 487                         if (!dopayobj(bp))
 488                                 return (1);
 489                         bill[tmp] = bill[--ESHK(shopkeeper)->billct];
 490                 }
 491         }
 492         pline("Thank you for shopping in %s's %s store!",
 493               shkname(shopkeeper),
 494               shopnam[rooms[ESHK(shopkeeper)->shoproom].rtype - 8]);
 495         NOTANGRY(shopkeeper) = 1;
 496         return (1);
 497 }
 498
 499 /* return 1 if paid successfully */
 500 /*        0 if not enough money */
 501 /*       -1 if object could not be found (but was paid) */
 502 static int
 503 dopayobj(struct bill_x *bp)
 504 {
 505         struct obj *obj;
 506         long ltmp;
 507
 508         /* find the object on one of the lists */
 509         obj = bp_to_obj(bp);
 510
 511         if (!obj) {
 512                 impossible("Shopkeeper administration out of order.");
 513                 setpaid();      /* be nice to the player */
 514                 return (0);
 515         }
 516
 517         if (!obj->unpaid && !bp->useup) {
 518                 impossible("Paid object on bill??");
 519                 return (1);
 520         }
 521         obj->unpaid = 0;
 522         ltmp = bp->price * bp->bquan;
 523         if (ANGRY(shopkeeper))
 524                 ltmp += ltmp / 3;
 525         if (u.ugold < ltmp) {
 526                 pline("You don't have gold enough to pay %s.",
 527                       doname(obj));
 528                 obj->unpaid = 1;
 529                 return (0);
 530         }
 531         pay(ltmp, shopkeeper);
 532         pline("You bought %s for %ld gold piece%s.",
 533               doname(obj), ltmp, plur(ltmp));
 534         if (bp->useup) {
 535                 struct obj *otmp = billobjs;
 536                 if (obj == billobjs)
 537                         billobjs = obj->nobj;
 538                 else {
 539                         while (otmp && otmp->nobj != obj)
 540                                 otmp = otmp->nobj;
 541                         if (otmp)
 542                                 otmp->nobj = obj->nobj;
 543                         else
 544                                 pline("Error in shopkeeper administration.");
 545                 }
 546                 free(obj);
 547         }
 548         return (1);
 549 }
 550
 551 /* routine called after dying (or quitting) with nonempty bill */
 552 void
 553 paybill(void)
 554 {
 555         if (shlevel == dlevel && shopkeeper && ESHK(shopkeeper)->billct) {
 556                 addupbill();
 557                 if (total > u.ugold) {
 558                         shopkeeper->mgold += u.ugold;
 559                         u.ugold = 0;
 560                         pline("%s comes and takes all your possessions.",
 561                               Monnam(shopkeeper));
 562                 } else {
 563                         u.ugold -= total;
 564                         shopkeeper->mgold += total;
 565                         pline("%s comes and takes the %ld zorkmids you owed him.",
 566                             Monnam(shopkeeper), total);
 567                 }
 568                 setpaid();      /* in case we create bones */
 569         }
 570 }
 571
 572 /* find obj on one of the lists */
 573 static struct obj *
 574 bp_to_obj(struct bill_x *bp)
 575 {
 576         struct obj *obj;
 577         struct monst *mtmp;
 578         unsigned id = bp->bo_id;
 579
 580         if (bp->useup)
 581                 obj = o_on(id, billobjs);
 582         else if (!(obj = o_on(id, invent)) &&
 583                  !(obj = o_on(id, fobj)) &&
 584                  !(obj = o_on(id, fcobj))) {
 585                 for (mtmp = fmon; mtmp; mtmp = mtmp->nmon)
 586                         if ((obj = o_on(id, mtmp->minvent)) != NULL)
 587                                 break;
 588                 for (mtmp = fallen_down; mtmp; mtmp = mtmp->nmon)
 589                         if ((obj = o_on(id, mtmp->minvent)) != NULL)
 590                                 break;
 591         }
 592         return (obj);
 593 }
 594
 595 /* called in hack.c when we pickup an object */
 596 void
 597 addtobill(struct obj *obj)
 598 {
 599         struct bill_x *bp;
 600
 601         if (!inshop() ||
 602             (u.ux == ESHK(shopkeeper)->shk.x && u.uy == ESHK(shopkeeper)->shk.y) ||
 603             (u.ux == ESHK(shopkeeper)->shd.x && u.uy == ESHK(shopkeeper)->shd.y) ||
 604             onbill(obj) /* perhaps we threw it away earlier */
 605            )
 606                 return;
 607         if (ESHK(shopkeeper)->billct == BILLSZ) {
 608                 pline("You got that for free!");
 609                 return;
 610         }
 611         bp = &bill[ESHK(shopkeeper)->billct];
 612         bp->bo_id = obj->o_id;
 613         bp->bquan = obj->quan;
 614         bp->useup = 0;
 615         bp->price = getprice(obj);
 616         ESHK(shopkeeper)->billct++;
 617         obj->unpaid = 1;
 618 }
 619
 620 void
 621 splitbill(struct obj *obj, struct obj *otmp)
 622 {
 623         /* otmp has been split off from obj */
 624         struct bill_x *bp;
 625         int tmp;
 626
 627         bp = onbill(obj);
 628         if (!bp) {
 629                 impossible("splitbill: not on bill?");
 630                 return;
 631         }
 632         if (bp->bquan < otmp->quan)
 633                 impossible("Negative quantity on bill??");
 634         if (bp->bquan == otmp->quan)
 635                 impossible("Zero quantity on bill??");
 636         bp->bquan -= otmp->quan;
 637
 638         if (ESHK(shopkeeper)->billct == BILLSZ)
 639                 otmp->unpaid = 0;
 640         else {
 641                 tmp = bp->price;
 642                 bp = &bill[ESHK(shopkeeper)->billct];
 643                 bp->bo_id = otmp->o_id;
 644                 bp->bquan = otmp->quan;
 645                 bp->useup = 0;
 646                 bp->price = tmp;
 647                 ESHK(shopkeeper)->billct++;
 648         }
 649 }
 650
 651 void
 652 subfrombill(struct obj *obj)
 653 {
 654         long ltmp;
 655         int tmp;
 656         struct obj *otmp;
 657         struct bill_x *bp;
 658
 659         if (!inshop() ||
 660             (u.ux == ESHK(shopkeeper)->shk.x && u.uy == ESHK(shopkeeper)->shk.y) ||
 661             (u.ux == ESHK(shopkeeper)->shd.x && u.uy == ESHK(shopkeeper)->shd.y))
 662                 return;
 663         if ((bp = onbill(obj)) != 0) {
 664                 obj->unpaid = 0;
 665                 if (bp->bquan > obj->quan) {
 666                         otmp = newobj(0);
 667                         *otmp = *obj;
 668                         bp->bo_id = otmp->o_id = flags.ident++;
 669                         otmp->quan = (bp->bquan -= obj->quan);
 670                         otmp->owt = 0;  /* superfluous */
 671                         otmp->onamelth = 0;
 672                         bp->useup = 1;
 673                         otmp->nobj = billobjs;
 674                         billobjs = otmp;
 675                         return;
 676                 }
 677                 ESHK(shopkeeper)->billct--;
 678                 *bp = bill[ESHK(shopkeeper)->billct];
 679                 return;
 680         }
 681         if (obj->unpaid) {
 682                 pline("%s didn't notice.", Monnam(shopkeeper));
 683                 obj->unpaid = 0;
 684                 return;         /* %% */
 685         }
 686         /* he dropped something of his own - probably wants to sell it */
 687         if (shopkeeper->msleep || shopkeeper->mfroz ||
 688             inroom(shopkeeper->mx, shopkeeper->my) != ESHK(shopkeeper)->shoproom)
 689                 return;
 690         if (ESHK(shopkeeper)->billct == BILLSZ ||
 691             ((tmp = shtypes[rooms[ESHK(shopkeeper)->shoproom].rtype - 8]) &&
 692              tmp != obj->olet) || strchr("_0", obj->olet)) {
 693                 pline("%s seems not interested.", Monnam(shopkeeper));
 694                 return;
 695         }
 696         ltmp = getprice(obj) * obj->quan;
 697         if (ANGRY(shopkeeper)) {
 698                 ltmp /= 3;
 699                 NOTANGRY(shopkeeper) = 1;
 700         } else
 701                 ltmp /= 2;
 702         if (ESHK(shopkeeper)->robbed) {
 703                 if ((ESHK(shopkeeper)->robbed -= ltmp) < 0)
 704                         ESHK(shopkeeper)->robbed = 0;
 705                 pline("Thank you for your contribution to restock this recently plundered shop.");
 706                 return;
 707         }
 708         if (ltmp > shopkeeper->mgold)
 709                 ltmp = shopkeeper->mgold;
 710         pay(-ltmp, shopkeeper);
 711         if (!ltmp)
 712                 pline("%s gladly accepts %s but cannot pay you at present.",
 713                       Monnam(shopkeeper), doname(obj));
 714         else
 715                 pline("You sold %s and got %ld gold piece%s.", doname(obj), ltmp,
 716                       plur(ltmp));
 717 }
 718
 719 int
 720 doinvbill(int mode)     /* 0: deliver count 1: paged */
 721 {
 722         struct bill_x *bp;
 723         struct obj *obj;
 724         long totused, thisused;
 725         char buf[BUFSZ];
 726
 727         if (mode == 0) {
 728                 int cnt = 0;
 729
 730                 if (shopkeeper)
 731                         for (bp = bill; bp - bill < ESHK(shopkeeper)->billct; bp++)
 732                                 if (bp->useup ||
 733                                     ((obj = bp_to_obj(bp)) && obj->quan < bp->bquan))
 734                                         cnt++;
 735                 return (cnt);
 736         }
 737
 738         if (!shopkeeper) {
 739                 impossible("doinvbill: no shopkeeper?");
 740                 return (0);
 741         }
 742
 743         set_pager(0);
 744         if (page_line("Unpaid articles already used up:") || page_line(""))
 745                 goto quit;
 746
 747         totused = 0;
 748         for (bp = bill; bp - bill < ESHK(shopkeeper)->billct; bp++) {
 749                 obj = bp_to_obj(bp);
 750                 if (!obj) {
 751                         impossible("Bad shopkeeper administration.");
 752                         goto quit;
 753                 }
 754                 if (bp->useup || bp->bquan > obj->quan) {
 755                         int cnt, oquan, uquan;
 756
 757                         oquan = obj->quan;
 758                         uquan = (bp->useup ? bp->bquan : bp->bquan - oquan);
 759                         thisused = bp->price * uquan;
 760                         totused += thisused;
 761                         obj->quan = uquan;      /* cheat doname */
 762                         sprintf(buf, "x -  %s", doname(obj));
 763                         obj->quan = oquan;      /* restore value */
 764                         for (cnt = 0; buf[cnt]; cnt++)
 765                                 ; /* nothing */
 766                         while (cnt < 50)
 767                                 buf[cnt++] = ' ';
 768                         sprintf(&buf[cnt], " %5ld zorkmids", thisused);
 769                         if (page_line(buf))
 770                                 goto quit;
 771                 }
 772         }
 773         sprintf(buf, "Total:%50ld zorkmids", totused);
 774         if (page_line("") || page_line(buf))
 775                 goto quit;
 776         set_pager(1);
 777         return (0);
 778 quit:
 779         set_pager(2);
 780         return (0);
 781 }
 782
 783 static int
 784 getprice(struct obj *obj)
 785 {
 786         int tmp, ac;
 787
 788         switch (obj->olet) {
 789         case AMULET_SYM:
 790                 tmp = 10 * rnd(500);
 791                 break;
 792         case TOOL_SYM:
 793                 tmp = 10 * rnd((obj->otyp == EXPENSIVE_CAMERA) ? 150 : 30);
 794                 break;
 795         case RING_SYM:
 796                 tmp = 10 * rnd(100);
 797                 break;
 798         case WAND_SYM:
 799                 tmp = 10 * rnd(100);
 800                 break;
 801         case SCROLL_SYM:
 802                 tmp = 10 * rnd(50);
 803 #ifdef MAIL
 804                 if (obj->otyp == SCR_MAIL)
 805                         tmp = rnd(5);
 806 #endif /* MAIL */
 807                 break;
 808         case POTION_SYM:
 809                 tmp = 10 * rnd(50);
 810                 break;
 811         case FOOD_SYM:
 812                 tmp = 10 * rnd(5 + (2000 / realhunger()));
 813                 break;
 814         case GEM_SYM:
 815                 tmp = 10 * rnd(20);
 816                 break;
 817         case ARMOR_SYM:
 818                 ac = ARM_BONUS(obj);
 819                 if (ac <= -10)  /* probably impossible */
 820                         ac = -9;
 821                 tmp = 100 + ac * ac * rnd(10 + ac);
 822                 break;
 823         case WEAPON_SYM:
 824                 if (obj->otyp < BOOMERANG)
 825                         tmp = 5 * rnd(10);
 826                 else if (obj->otyp == LONG_SWORD ||
 827                          obj->otyp == TWO_HANDED_SWORD)
 828                         tmp = 10 * rnd(150);
 829                 else
 830                         tmp = 10 * rnd(75);
 831                 break;
 832         case CHAIN_SYM:
 833                 pline("Strange ..., carrying a chain?");
 834         case BALL_SYM:
 835                 tmp = 10;
 836                 break;
 837         default:
 838                 tmp = 10000;
 839         }
 840         return (tmp);
 841 }
 842
 843 static int
 844 realhunger(void)        /* not completely foolproof */
 845 {
 846         int tmp = u.uhunger;
 847         struct obj *otmp = invent;
 848
 849         while (otmp) {
 850                 if (otmp->olet == FOOD_SYM && !otmp->unpaid)
 851                         tmp += objects[otmp->otyp].nutrition;
 852                 otmp = otmp->nobj;
 853         }
 854         return ((tmp <= 0) ? 1 : tmp);
 855 }
 856
 857 bool
 858 shkcatch(struct obj *obj)
 859 {
 860         struct monst *shkp = shopkeeper;
 861
 862         if (u.uinshop && shkp && !shkp->mfroz && !shkp->msleep &&
 863             u.dx && u.dy &&
 864             inroom(u.ux + u.dx, u.uy + u.dy) + 1 == u.uinshop &&
 865             shkp->mx == ESHK(shkp)->shk.x && shkp->my == ESHK(shkp)->shk.y &&
 866             u.ux == ESHK(shkp)->shd.x && u.uy == ESHK(shkp)->shd.y) {
 867                 pline("%s nimbly catches the %s.", Monnam(shkp), xname(obj));
 868                 obj->nobj = shkp->minvent;
 869                 shkp->minvent = obj;
 870                 return (1);
 871         }
 872         return (0);
 873 }
 874
 875 /*
 876  * shk_move: return 1: he moved  0: he didnt  -1: let m_move do it
 877  */
 878 int
 879 shk_move(struct monst *shkp)
 880 {
 881         struct monst *mtmp;
 882         struct permonst *mdat = shkp->data;
 883         xchar gx, gy, omx, omy, nx, ny, nix, niy;
 884         schar appr, i;
 885         int udist;
 886         int z;
 887         schar shkroom, chi, chcnt, cnt;
 888         boolean uondoor = 0, satdoor, avoid = 0, badinv;
 889         coord poss[9];
 890         int info[9];
 891         struct obj *ib = 0;
 892
 893         omx = shkp->mx;
 894         omy = shkp->my;
 895
 896         if ((udist = dist(omx, omy)) < 3) {
 897                 if (ANGRY(shkp)) {
 898                         hitu(shkp, d(mdat->damn, mdat->damd) + 1);
 899                         return (0);
 900                 }
 901                 if (ESHK(shkp)->following) {
 902                         if (strncmp(ESHK(shkp)->customer, plname, PL_NSIZ)) {
 903                                 pline("Hello %s! I was looking for %s.",
 904                                       plname, ESHK(shkp)->customer);
 905                                 ESHK(shkp)->following = 0;
 906                                 return (0);
 907                         }
 908                         if (!ESHK(shkp)->robbed) {      /* impossible? */
 909                                 ESHK(shkp)->following = 0;
 910                                 return (0);
 911                         }
 912                         if (moves > followmsg + 4) {
 913                                 pline("Hello %s! Didn't you forget to pay?",
 914                                       plname);
 915                                 followmsg = moves;
 916                         }
 917                         if (udist < 2)
 918                                 return (0);
 919                 }
 920         }
 921
 922         shkroom = inroom(omx, omy);
 923         appr = 1;
 924         gx = ESHK(shkp)->shk.x;
 925         gy = ESHK(shkp)->shk.y;
 926         satdoor = (gx == omx && gy == omy);
 927         if (ESHK(shkp)->following || ((z = holetime()) >= 0 && z * z <= udist)) {
 928                 gx = u.ux;
 929                 gy = u.uy;
 930                 if (shkroom < 0 || shkroom != inroom(u.ux, u.uy))
 931                         if (udist > 4)
 932                                 return (-1);    /* leave it to m_move */
 933         } else if (ANGRY(shkp)) {
 934                 long saveBlind = Blind;
 935                 Blind = 0;
 936                 if (shkp->mcansee && !Invis && cansee(omx, omy)) {
 937                         gx = u.ux;
 938                         gy = u.uy;
 939                 }
 940                 Blind = saveBlind;
 941                 avoid = FALSE;
 942         } else {
 943 #define GDIST(x, y)     ((x - gx) * (x - gx) + (y - gy) * (y - gy))
 944                 if (Invis)
 945                         avoid = FALSE;
 946                 else {
 947                         uondoor = (u.ux == ESHK(shkp)->shd.x &&
 948                                    u.uy == ESHK(shkp)->shd.y);
 949                         if (uondoor) {
 950                                 if (ESHK(shkp)->billct)
 951                                         pline("Hello %s! Will you please pay before leaving?",
 952                                             plname);
 953                                 badinv = (carrying(PICK_AXE) || carrying(ICE_BOX));
 954                                 if (satdoor && badinv)
 955                                         return (0);
 956                                 avoid = !badinv;
 957                         } else {
 958                                 avoid = (u.uinshop && dist(gx, gy) > 8);
 959                                 badinv = FALSE;
 960                         }
 961
 962                         if (((!ESHK(shkp)->robbed && !ESHK(shkp)->billct) || avoid)
 963                             && GDIST(omx, omy) < 3) {
 964                                 if (!badinv && !online(omx, omy))
 965                                         return (0);
 966                                 if (satdoor)
 967                                         appr = gx = gy = 0;
 968                         }
 969                 }
 970         }
 971         if (omx == gx && omy == gy)
 972                 return (0);
 973         if (shkp->mconf) {
 974                 avoid = FALSE;
 975                 appr = 0;
 976         }
 977         nix = omx;
 978         niy = omy;
 979         cnt = mfndpos(shkp, poss, info, ALLOW_SSM);
 980         if (avoid && uondoor) { /* perhaps we cannot avoid him */
 981                 for (i = 0; i < cnt; i++)
 982                         if (!(info[i] & NOTONL))
 983                                 goto notonl_ok;
 984                 avoid = FALSE;
 985 notonl_ok:
 986                 ;
 987         }
 988         chi = -1;
 989         chcnt = 0;
 990         for (i = 0; i < cnt; i++) {
 991                 nx = poss[i].x;
 992                 ny = poss[i].y;
 993                 if (levl[nx][ny].typ == ROOM
 994                     || shkroom != ESHK(shkp)->shoproom
 995                     || ESHK(shkp)->following) {
 996 #ifdef STUPID
 997                         /* cater for stupid compilers */
 998                         int zz;
 999 #endif /* STUPID */
1000                         if (uondoor && (ib = sobj_at(ICE_BOX, nx, ny))) {
1001                                 nix = nx;
1002                                 niy = ny;
1003                                 chi = i; break;
1004                         }
1005                         if (avoid && (info[i] & NOTONL))
1006                                 continue;
1007                         if ((!appr && !rn2(++chcnt)) ||
1008 #ifdef STUPID
1009                             (appr && (zz = GDIST(nix, niy)) && zz > GDIST(nx, ny))
1010 #else
1011                             (appr && GDIST(nx, ny) < GDIST(nix, niy))
1012 #endif /* STUPID */
1013                             ) {
1014                                 nix = nx;
1015                                 niy = ny;
1016                                 chi = i;
1017                         }
1018                 }
1019         }
1020         if (nix != omx || niy != omy) {
1021                 if (info[chi] & ALLOW_M) {
1022                         mtmp = m_at(nix, niy);
1023                         if (hitmm(shkp, mtmp) == 1 && rn2(3) &&
1024                             hitmm(mtmp, shkp) == 2)
1025                                 return (2);
1026                         return (0);
1027                 } else if (info[chi] & ALLOW_U) {
1028                         hitu(shkp, d(mdat->damn, mdat->damd) + 1);
1029                         return (0);
1030                 }
1031                 shkp->mx = nix;
1032                 shkp->my = niy;
1033                 pmon(shkp);
1034                 if (ib) {
1035                         freeobj(ib);
1036                         mpickobj(shkp, ib);
1037                 }
1038                 return (1);
1039         }
1040         return (0);
1041 }
1042
1043 /* He is digging in the shop. */
1044 void
1045 shopdig(int fall)
1046 {
1047         if (!fall) {
1048                 if (u.utraptype == TT_PIT)
1049                         pline("\"Be careful, sir, or you might fall through the floor.\"");
1050                 else
1051                         pline("\"Please, do not damage the floor here.\"");
1052         } else if (dist(shopkeeper->mx, shopkeeper->my) < 3) {
1053                 struct obj *obj, *obj2;
1054
1055                 pline("%s grabs your backpack!", shkname(shopkeeper));
1056                 for (obj = invent; obj; obj = obj2) {
1057                         obj2 = obj->nobj;
1058                         if (obj->owornmask)
1059                                 continue;
1060                         freeinv(obj);
1061                         obj->nobj = shopkeeper->minvent;
1062                         shopkeeper->minvent = obj;
1063                         if (obj->unpaid)
1064                                 subfrombill(obj);
1065                 }
1066         }
1067 }
1068 #endif /* QUEST */
1069
1070 bool
1071 online(int x, int y)
1072 {
1073         return (x == u.ux || y == u.uy ||
1074                 (x - u.ux) * (x - u.ux) == (y - u.uy) * (y - u.uy));
1075 }
1076
1077 /* Does this monster follow me downstairs? */
1078 bool
1079 follower(struct monst *mtmp)
1080 {
1081         return (mtmp->mtame || strchr("1TVWZi&, ", mtmp->data->mlet)
1082 #ifndef QUEST
1083                 || (mtmp->isshk && ESHK(mtmp)->following)
1084 #endif /* QUEST */
1085                 );
1086 }