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do.c

/*    SCCS Id: @(#)do.c 3.3   1999/11/29  */
/* Copyright (c) Stichting Mathematisch Centrum, Amsterdam, 1985. */
/* NetHack may be freely redistributed.  See license for details. */

/* Contains code for 'd', 'D' (drop), '>', '<' (up, down) */

#include "hack.h"
#include "lev.h"

#include <errno.h>
#ifdef _MSC_VER   /* MSC 6.0 defines errno quite differently */
# if (_MSC_VER >= 600)
#  define SKIP_ERRNO
# endif
#endif
#ifndef SKIP_ERRNO
#ifdef _DCC
const
#endif
extern int errno;
#endif

#ifdef SINKS
# ifdef OVLB
STATIC_DCL void FDECL(trycall, (struct obj *));
# endif /* OVLB */
STATIC_DCL void FDECL(dosinkring, (struct obj *));
#endif /* SINKS */

STATIC_PTR int FDECL(drop, (struct obj *));
STATIC_PTR int NDECL(wipeoff);

#ifdef OVL0
STATIC_DCL int FDECL(menu_drop, (int));
#endif
#ifdef OVL2
STATIC_DCL int NDECL(currentlevel_rewrite);
STATIC_DCL void NDECL(final_level);
/* static boolean FDECL(badspot, (XCHAR_P,XCHAR_P)); */
#endif

#ifdef OVLB

static NEARDATA const char drop_types[] =
      { ALLOW_COUNT, GOLD_CLASS, ALL_CLASSES, 0 };

/* 'd' command: drop one inventory item */
int
dodrop()
{
      int result, i = (invent || u.ugold) ? 0 : (SIZE(drop_types) - 1);

      if (*u.ushops) sellobj_state(TRUE);
      result = drop(getobj(&drop_types[i], "drop"));
      if (*u.ushops) sellobj_state(FALSE);
      reset_occupations();

      return result;
}

#endif /* OVLB */
#ifdef OVL0

/* Called when a boulder is dropped, thrown, or pushed.  If it ends up
 * in a pool, it either fills the pool up or sinks away.  In either case,
 * it's gone for good...  If the destination is not a pool, returns FALSE.
 */
boolean
boulder_hits_pool(otmp, rx, ry, pushing)
struct obj *otmp;
register int rx, ry;
boolean pushing;
{
      if (!otmp || otmp->otyp != BOULDER)
          impossible("Not a boulder?");
      else if (!Is_waterlevel(&u.uz) && (is_pool(rx,ry) || is_lava(rx,ry))) {
          boolean lava = is_lava(rx,ry), fills_up;
          const char *what = lava ? "lava" : "water";
          schar ltyp = levl[rx][ry].typ;
          int chance = rn2(10);           /* water: 90%; lava: 10% */
          fills_up = lava ? chance == 0 : chance != 0;

          if (fills_up) {
            if (ltyp == DRAWBRIDGE_UP) {
                levl[rx][ry].drawbridgemask &= ~DB_UNDER; /* clear lava */
                levl[rx][ry].drawbridgemask |= DB_FLOOR;
            } else
                levl[rx][ry].typ = ROOM;

            bury_objs(rx, ry);
            newsym(rx,ry);
            if (pushing) {
                You("push %s into the %s.", the(xname(otmp)), what);
                if (flags.verbose && !Blind)
                  pline("Now you can cross it!");
                /* no splashing in this case */
            }
          }
          if (!fills_up || !pushing) {    /* splashing occurs */
            if (!u.uinwater) {
                if (pushing ? !Blind : cansee(rx,ry)) {
                  boolean moat = (ltyp != WATER) &&
                      !Is_medusa_level(&u.uz) && !Is_waterlevel(&u.uz);

                  There("is a large splash as %s %s the %s.",
                        the(xname(otmp)), fills_up? "fills":"falls into",
                        lava ? "lava" : ltyp==POOL ? "pool" :
                        moat ? "moat" : "water");
                } else if (flags.soundok)
                  You_hear("a%s splash.", lava ? " sizzling" : "");
                wake_nearto(rx, ry, 40);
            }

            if (fills_up && u.uinwater && distu(rx,ry) == 0) {
                u.uinwater = 0;
                docrt();
                vision_full_recalc = 1;
                You("find yourself on dry land again!");
            } else if (lava && distu(rx,ry) <= 2) {
                You("are hit by molten lava%c",
                  Fire_resistance ? '.' : '!');
                  burn_away_slime();
                losehp(d((Fire_resistance ? 1 : 3), 6),
                     "molten lava", KILLED_BY);
            } else if (!fills_up && flags.verbose &&
                     (pushing ? !Blind : cansee(rx,ry)))
                pline("It sinks without a trace!");
          }

          /* boulder is now gone */
          if (pushing) delobj(otmp);
          else obfree(otmp, (struct obj *)0);
          return TRUE;
      }
      return FALSE;
}

/* Used for objects which sometimes do special things when dropped; must be
 * called with the object not in any chain.  Returns TRUE if the object goes
 * away.
 */
boolean
flooreffects(obj,x,y,verb)
struct obj *obj;
int x,y;
const char *verb;
{
      struct trap *t;
      struct monst *mtmp;

      if (obj->where != OBJ_FREE)
          panic("flooreffects: obj not free");

      /* make sure things like water_damage() have no pointers to follow */
      obj->nobj = obj->nexthere = (struct obj *)0;

      if (obj->otyp == BOULDER && boulder_hits_pool(obj, x, y, FALSE))
            return TRUE;
      else if (obj->otyp == BOULDER && (t = t_at(x,y)) != 0 &&
             (t->ttyp==PIT || t->ttyp==SPIKED_PIT
                  || t->ttyp==TRAPDOOR || t->ttyp==HOLE)) {
            if (((mtmp = m_at(x, y)) && mtmp->mtrapped) ||
                  (u.utrap && u.ux == x && u.uy == y)) {
                if (*verb)
                  pline_The("boulder %ss into the pit%s.", verb,
                        (mtmp) ? "" : " with you");
                if (mtmp) {
                  if (!passes_walls(mtmp->data) &&
                        !throws_rocks(mtmp->data)) {
                      if (hmon(mtmp, obj, TRUE))
                        return FALSE;     /* still alive */
                  } else mtmp->mtrapped = 0;
                } else {
                  if (!Passes_walls && !throws_rocks(youmonst.data)) {
                      losehp(rnd(15), "squished under a boulder",
                           NO_KILLER_PREFIX);
                      return FALSE; /* player remains trapped */
                  } else u.utrap = 0;
                }
            }
            if (*verb) {
                  if (Blind) {
                        if ((x == u.ux) && (y == u.uy))
                              You_hear("a CRASH! beneath you.");
                        else
                              You_hear("the boulder %s.", verb);
                  } else if (cansee(x, y)) {
                        pline_The("boulder %s%s.",
                            t->tseen ? "" : "triggers and ",
                            t->ttyp == TRAPDOOR ? "plugs a trap door" :
                            t->ttyp == HOLE ? "plugs a hole" :
                            "fills a pit");
                  }
            }
            deltrap(t);
            obfree(obj, (struct obj *)0);
            bury_objs(x, y);
            newsym(x,y);
            return TRUE;
      } else if (is_pool(x, y)) {
            water_damage(obj, FALSE, FALSE);
      }
      return FALSE;
}

#endif /* OVL0 */
#ifdef OVLB

void
doaltarobj(obj)  /* obj is an object dropped on an altar */
      register struct obj *obj;
{
      if (Blind) return;

      /* KMH, conduct */
      u.uconduct.gnostic++;

      if (obj->blessed || obj->cursed) {
            There("is %s flash as %s hit%s the altar.",
                  an(hcolor(obj->blessed ? amber : Black)),
                  doname(obj),
                  (obj->quan == 1L) ? "s" : "");
            if (!Hallucination) obj->bknown = 1;
      } else {
            pline("%s land%s on the altar.", Doname2(obj),
                  (obj->quan == 1L) ? "s" : "");
            obj->bknown = 1;
      }
}

#ifdef SINKS
STATIC_OVL
void
trycall(obj)
register struct obj *obj;
{
      if(!objects[obj->otyp].oc_name_known &&
         !objects[obj->otyp].oc_uname)
         docall(obj);
}

STATIC_OVL
void
dosinkring(obj)  /* obj is a ring being dropped over a kitchen sink */
register struct obj *obj;
{
      register struct obj *otmp,*otmp2;
      register boolean ideed = TRUE;

      You("drop %s down the drain.", doname(obj));
      obj->in_use = TRUE;     /* block free identification via interrupt */
      switch(obj->otyp) {     /* effects that can be noticed without eyes */
          case RIN_SEARCHING:
            You("thought your %s got lost in the sink, but there it is!",
                  xname(obj));
            goto giveback;
          case RIN_SLOW_DIGESTION:
            pline_The("ring is regurgitated!");
giveback:
            obj->in_use = FALSE;
            dropx(obj);
            trycall(obj);
            return;
          case RIN_LEVITATION:
            pline_The("sink quivers upward for a moment.");
            break;
          case RIN_POISON_RESISTANCE:
            You("smell rotten %s.", makeplural(pl_fruit));
            break;
          case RIN_AGGRAVATE_MONSTER:
            pline("Several flies buzz angrily around the sink.");
            break;
          case RIN_SHOCK_RESISTANCE:
            pline("Static electricity surrounds the sink.");
            break;
          case RIN_CONFLICT:
            You_hear("loud noises coming from the drain.");
            break;
          case RIN_SUSTAIN_ABILITY: /* KMH */
            pline_The("water flow seems fixed.");
            break;
          case RIN_GAIN_STRENGTH:
            pline_The("water flow seems %ser now.",
                  (obj->spe<0) ? "weak" : "strong");
            break;
          case RIN_GAIN_CONSTITUTION:
            pline_The("water flow seems %ser now.",
                  (obj->spe<0) ? "less" : "great");
            break;
          case RIN_INCREASE_ACCURACY:     /* KMH */
            pline_The("water flow %s the drain.",
                  (obj->spe<0) ? "misses" : "hits");
            break;
          case RIN_INCREASE_DAMAGE:
            pline_The("water's force seems %ser now.",
                  (obj->spe<0) ? "small" : "great");
            break;
          case RIN_HUNGER:
            ideed = FALSE;
            for(otmp = level.objects[u.ux][u.uy]; otmp; otmp = otmp2) {
                otmp2 = otmp->nexthere;
                if (otmp != uball && otmp != uchain &&
                      !obj_resists(otmp, 1, 99)) {
                  if (!Blind) {
                      pline("Suddenly, %s vanishes from the sink!",
                                          doname(otmp));
                      ideed = TRUE;
                  }
                  delobj(otmp);
                }
            }
            break;
          case MEAT_RING:
            /* Not the same as aggravate monster; besides, it's obvious. */
            pline("Several flies buzz around the sink.");
            break;
          default:
            ideed = FALSE;
            break;
      }
      if(!Blind && !ideed && obj->otyp != RIN_HUNGER) {
          ideed = TRUE;
          switch(obj->otyp) {       /* effects that need eyes */
            case RIN_ADORNMENT:
                pline_The("faucets flash brightly for a moment.");
                break;
            case RIN_REGENERATION:
                pline_The("sink looks as good as new.");
                break;
            case RIN_INVISIBILITY:
                You("don't see anything happen to the sink.");
                break;
            case RIN_FREE_ACTION:
                You("see the ring slide right down the drain!");
                break;
            case RIN_SEE_INVISIBLE:
                You("see some air in the sink.");
                break;
            case RIN_STEALTH:
            pline_The("sink seems to blend into the floor for a moment.");
                break;
            case RIN_FIRE_RESISTANCE:
            pline_The("hot water faucet flashes brightly for a moment.");
                break;
            case RIN_COLD_RESISTANCE:
            pline_The("cold water faucet flashes brightly for a moment.");
                break;
            case RIN_PROTECTION_FROM_SHAPE_CHAN:
                pline_The("sink looks nothing like a fountain.");
                break;
            case RIN_PROTECTION:
                pline_The("sink glows %s for a moment.",
                      hcolor((obj->spe<0) ? Black : silver));
                break;
            case RIN_WARNING:
                pline_The("sink glows %s for a moment.", hcolor(White));
                break;
            case RIN_TELEPORTATION:
                pline_The("sink momentarily vanishes.");
                break;
            case RIN_TELEPORT_CONTROL:
          pline_The("sink looks like it is being beamed aboard somewhere.");
                break;
            case RIN_POLYMORPH:
                pline_The("sink momentarily looks like a fountain.");
                break;
            case RIN_POLYMORPH_CONTROL:
      pline_The("sink momentarily looks like a regularly erupting geyser.");
                break;
          }
      }
      if(ideed)
          trycall(obj);
      else
          You_hear("the ring bouncing down the drainpipe.");
      if (!rn2(20)) {
            pline_The("sink backs up, leaving %s.", doname(obj));
            obj->in_use = FALSE;
            dropx(obj);
      } else
            useup(obj);
}
#endif

#endif /* OVLB */
#ifdef OVL0

/* some common tests when trying to drop or throw items */
boolean
canletgo(obj,word)
register struct obj *obj;
register const char *word;
{
      if(obj->owornmask & (W_ARMOR | W_RING | W_AMUL | W_TOOL)){
            if (*word)
                  Norep("You cannot %s %s you are wearing.",word,
                        something);
            return(FALSE);
      }
      if (obj->otyp == LOADSTONE && obj->cursed) {
            if (*word)
                  pline("For some reason, you cannot %s the stone%s!",
                        word, plur(obj->quan));
            /* Kludge -- see invent.c */
            if (obj->corpsenm) {
                  struct obj *otmp;

                  otmp = obj;
                  obj = obj->nobj;
                  obj->quan += otmp->quan;
                  obj->owt = weight(obj);
                  freeinv(otmp);
                  obfree(otmp, obj);
            }
            obj->bknown = 1;
            return(FALSE);
      }
      if (obj->otyp == LEASH && obj->leashmon != 0) {
            if (*word)
                  pline_The("leash is tied around your %s.",
                              body_part(HAND));
            return(FALSE);
      }
#ifdef STEED
      if (obj->owornmask & W_SADDLE) {
            if (*word)
                  You("cannot %s %s you are sitting on.", word,
                        something);
            return (FALSE);
      }
#endif
      return(TRUE);
}

STATIC_PTR
int
drop(obj)
register struct obj *obj;
{
      if(!obj) return(0);
      if(!canletgo(obj,"drop"))
            return(0);
      if(obj == uwep) {
            if(welded(uwep)) {
                  weldmsg(obj);
                  return(0);
            }
            setuwep((struct obj *)0);
            if(uwep) return 0; /* lifesaved and rewielded */
      }
      if(obj == uquiver) {
            setuqwep((struct obj *)0);
      }
      if (obj == uswapwep) {
            setuswapwep((struct obj *)0);
      }

      if (u.uswallow) {
            /* barrier between you and the floor */
            if(flags.verbose)
                  You("drop %s into %s %s.", doname(obj),
                        s_suffix(mon_nam(u.ustuck)),
                        is_animal(u.ustuck->data) ?
                        "stomach" : "interior");
      } else {
#ifdef SINKS
          if((obj->oclass == RING_CLASS || obj->otyp == MEAT_RING) &&
                  IS_SINK(levl[u.ux][u.uy].typ)) {
            dosinkring(obj);
            return(1);
          }
#endif
          if (!can_reach_floor()) {
            if(flags.verbose) You("drop %s.", doname(obj));
            if (obj->oclass != GOLD_CLASS || obj == invent) freeinv(obj);
            hitfloor(obj);
            return(1);
          }
          if (IS_ALTAR(levl[u.ux][u.uy].typ)) {
            doaltarobj(obj);  /* set bknown */
          } else
            if(flags.verbose) You("drop %s.", doname(obj));
      }
      dropx(obj);
      return(1);
}

/* Called in several places - should not produce texts */
/* ship_object() _can_ produce texts--is that comment still correct? */
void
dropx(obj)
register struct obj *obj;
{
      /* Money is usually not in our inventory */
      if (obj->oclass != GOLD_CLASS || obj == invent) freeinv(obj);
      if (!u.uswallow && ship_object(obj, u.ux, u.uy, FALSE)) return;
      dropy(obj);
}

void
dropy(obj)
register struct obj *obj;
{
      if (!u.uswallow && flooreffects(obj,u.ux,u.uy,"drop")) return;
      /* KMH -- Fixed crysknives have only 10% chance of reverting */
      if (obj->otyp == CRYSKNIFE && (!obj->oerodeproof || !rn2(10))) {
            obj->otyp = WORM_TOOTH;
            obj->oerodeproof = 0;
      }
      /* uswallow check done by GAN 01/29/87 */
      if(u.uswallow) {
            if (obj != uball) {           /* mon doesn't pick up ball */
                (void) mpickobj(u.ustuck,obj);
            }
      } else  {
            place_object(obj, u.ux, u.uy);
            if (obj == uball)
                drop_ball(u.ux,u.uy);
            else
                sellobj(obj, u.ux, u.uy);
            stackobj(obj);
            if(Blind && Levitation)
                map_object(obj, 0);
            newsym(u.ux,u.uy);      /* remap location under self */
      }
}

/* 'D' command: drop several things */
int
doddrop()
{
      int result = 0;

      add_valid_menu_class(0); /* clear any classes already there */
      if (*u.ushops) sellobj_state(TRUE);
      if (flags.menu_style != MENU_TRADITIONAL ||
            (result = ggetobj("drop", drop, 0, FALSE)) < -1)
          result = menu_drop(result);
      if (*u.ushops) sellobj_state(FALSE);
      reset_occupations();

      return result;
}

/* Drop things from the hero's inventory, using a menu. */
STATIC_OVL int
menu_drop(retry)
int retry;
{
    int n, i, n_dropped = 0;
    long cnt;
    struct obj *otmp, *otmp2, *u_gold = 0;
    menu_item *pick_list;
    boolean all_categories = TRUE;
    boolean drop_everything = FALSE;

    if (u.ugold) {
      /* Hack: gold is not in the inventory, so make a gold object
         and put it at the head of the inventory list. */
      u_gold = mkgoldobj(u.ugold);  /* removes from u.ugold */
      u.ugold = u_gold->quan;       /* put the gold back */
      assigninvlet(u_gold);         /* might end up as NOINVSYM */
      u_gold->nobj = invent;
      invent = u_gold;
    }

    if (retry) {
      all_categories = (retry == -2);
    } else if (flags.menu_style == MENU_FULL) {
      all_categories = FALSE;
      n = query_category("Drop what type of items?",
                  invent,
                  UNPAID_TYPES | ALL_TYPES | CHOOSE_ALL,
                  &pick_list, PICK_ANY);
      if (!n) goto drop_done;
      for (i = 0; i < n; i++) {
          if (pick_list[i].item.a_int == ALL_TYPES_SELECTED)
            all_categories = TRUE;
          else if (pick_list[i].item.a_int == 'A')
            drop_everything = TRUE;
          else
            add_valid_menu_class(pick_list[i].item.a_int);
      }
      free((genericptr_t) pick_list);
    } else if (flags.menu_style == MENU_COMBINATION) {
      all_categories = FALSE;
      /* Gather valid classes via traditional NetHack method */
      i = ggetobj("drop", drop, 0, TRUE);
      if (i == -2) all_categories = TRUE;
    }

    if (drop_everything) {
      for(otmp = invent; otmp; otmp = otmp2) {
          otmp2 = otmp->nobj;
          n_dropped += drop(otmp);
      }
    } else {
      /* should coordinate with perm invent, maybe not show worn items */
      n = query_objlist("What would you like to drop?", invent,
                  USE_INVLET|INVORDER_SORT, &pick_list,
                  PICK_ANY, all_categories ? allow_all : allow_category);
      if (n > 0) {
          for (i = 0; i < n; i++) {
            otmp = pick_list[i].item.a_obj;
            cnt = pick_list[i].count;
            if (cnt < otmp->quan && !welded(otmp) &&
                  (!otmp->cursed || otmp->otyp != LOADSTONE)) {
                otmp2 = splitobj(otmp, cnt);
                /* assume other worn items aren't mergable */
                if (otmp == uwep) setuwep(otmp2);
                  if (otmp == uquiver) setuqwep(otmp2);
                  if (otmp == uswapwep) setuswapwep(otmp2);
            }
            n_dropped += drop(otmp);
          }
          free((genericptr_t) pick_list);
      }
    }

 drop_done:
    if (u_gold && invent && invent->oclass == GOLD_CLASS) {
      /* didn't drop [all of] it */
      u_gold = invent;
      invent = u_gold->nobj;
      dealloc_obj(u_gold);
    }
    return n_dropped;
}

#endif /* OVL0 */
#ifdef OVL2

/* on a ladder, used in goto_level */
static NEARDATA boolean at_ladder = FALSE;

int
dodown()
{
      struct trap *trap = 0;
      boolean stairs_down = ((u.ux == xdnstair && u.uy == ydnstair) ||
                (u.ux == sstairs.sx && u.uy == sstairs.sy && !sstairs.up)),
            ladder_down = (u.ux == xdnladder && u.uy == ydnladder);

      if (Levitation) {
          if ((HLevitation & I_SPECIAL) || (ELevitation & W_ARTI)) {
            /* end controlled levitation */
                  if (float_down(I_SPECIAL|TIMEOUT, W_ARTI))
                      return (1);   /* came down, so moved */
          }
          floating_above(stairs_down ? "stairs" : ladder_down ?
                     "ladder" : surface(u.ux, u.uy));
          return (0);   /* didn't move */
      }
      if (!stairs_down && !ladder_down) {
            if (!(trap = t_at(u.ux,u.uy)) ||
                  (trap->ttyp != TRAPDOOR && trap->ttyp != HOLE)
                  || !Can_fall_thru(&u.uz) || !trap->tseen) {
                  You_cant("go down here.");
                  return(0);
            }
      }
      if(u.ustuck) {
            You("are being held, and cannot go down.");
            return(1);
      }
      if (on_level(&valley_level, &u.uz) && !u.uevent.gehennom_entered) {
            You("are standing at the gate to Gehennom.");
            pline("Unspeakable cruelty and harm lurk down there.");
            if (yn("Are you sure you want to enter?") != 'y')
                  return(0);
            else pline("So be it.");
            u.uevent.gehennom_entered = 1;      /* don't ask again */
      }

      if(!next_to_u()) {
            You("are held back by your pet!");
            return(0);
      }

      if (trap)
          You("%s %s.", locomotion(youmonst.data, "jump"),
            trap->ttyp == HOLE ? "down the hole" : "through the trap door");

      if (trap && Is_stronghold(&u.uz)) {
            goto_hell(TRUE, TRUE);
      } else {
            at_ladder = (boolean) (levl[u.ux][u.uy].typ == LADDER);
            next_level(!trap);
            at_ladder = FALSE;
      }
      return(1);
}

int
doup()
{
      if( (u.ux != xupstair || u.uy != yupstair)
           && (!xupladder || u.ux != xupladder || u.uy != yupladder)
           && (!sstairs.sx || u.ux != sstairs.sx || u.uy != sstairs.sy
                  || !sstairs.up)
        ) {
            You_cant("go up here.");
            return(0);
      }
      if(u.ustuck) {
            You("are being held, and cannot go up.");
            return(1);
      }
      if(near_capacity() > SLT_ENCUMBER) {
            /* No levitation check; inv_weight() already allows for it */
            Your("load is too heavy to climb the %s.",
                  levl[u.ux][u.uy].typ == STAIRS ? "stairs" : "ladder");
            return(1);
      }
      if(ledger_no(&u.uz) == 1) {
            if (yn("Beware, there will be no return! Still climb?") != 'y')
                  return(0);
      }
      if(!next_to_u()) {
            You("are held back by your pet!");
            return(0);
      }
      at_ladder = (boolean) (levl[u.ux][u.uy].typ == LADDER);
      prev_level(TRUE);
      at_ladder = FALSE;
      return(1);
}

d_level save_dlevel = {0, 0};

/* check that we can write out the current level */
STATIC_OVL int
currentlevel_rewrite()
{
      register int fd;

      /* since level change might be a bit slow, flush any buffered screen
       *  output (like "you fall through a trap door") */
      mark_synch();

      fd = create_levelfile(ledger_no(&u.uz));

      if(fd < 0) {
            /*
             * This is not quite impossible: e.g., we may have
             * exceeded our quota. If that is the case then we
             * cannot leave this level, and cannot save either.
             * Another possibility is that the directory was not
             * writable.
             */
            pline("Cannot create level file for level %d.",
                                    ledger_no(&u.uz));
            return -1;
      }

#ifdef MFLOPPY
      if (!savelev(fd, ledger_no(&u.uz), COUNT_SAVE)) {
            (void) close(fd);
            delete_levelfile(ledger_no(&u.uz));
            pline("NetHack is out of disk space for making levels!");
            You("can save, quit, or continue playing.");
            return -1;
      }
#endif
      return fd;
}

#ifdef INSURANCE
void
save_currentstate()
{
      int fd;

      if (flags.ins_chkpt) {
            /* write out just-attained level, with pets and everything */
            fd = currentlevel_rewrite();
            if(fd < 0) return;
            bufon(fd);
            savelev(fd,ledger_no(&u.uz), WRITE_SAVE);
            bclose(fd);
      }

      /* write out non-level state */
      savestateinlock();
}
#endif

/*
static boolean
badspot(x, y)
register xchar x, y;
{
      return((levl[x][y].typ != ROOM && levl[x][y].typ != AIR &&
                   levl[x][y].typ != CORR) || MON_AT(x, y));
}
*/

void
goto_level(newlevel, at_stairs, falling, portal)
d_level *newlevel;
boolean at_stairs, falling, portal;
{
      int fd, l_idx;
      xchar new_ledger;
      boolean cant_go_back,
            up = (depth(newlevel) < depth(&u.uz)),
            newdungeon = (u.uz.dnum != newlevel->dnum),
            was_in_W_tower = In_W_tower(u.ux, u.uy, &u.uz),
            familiar = FALSE;
      boolean new = FALSE;    /* made a new level? */
      struct monst *mtmp;

      if (dunlev(newlevel) > dunlevs_in_dungeon(newlevel))
            newlevel->dlevel = dunlevs_in_dungeon(newlevel);
      if (newdungeon && In_endgame(newlevel)) { /* 1st Endgame Level !!! */
            if (u.uhave.amulet)
                assign_level(newlevel, &earth_level);
            else return;
      }
      new_ledger = ledger_no(newlevel);
      if (new_ledger <= 0)
            done(ESCAPED);    /* in fact < 0 is impossible */

      /* If you have the amulet and are trying to get out of Gehennom, going
       * up a set of stairs sometimes does some very strange things!
       * Biased against law and towards chaos, but not nearly as strongly
       * as it used to be (prior to 3.2.0).
       * Odds:        old                           new
       *    "up"    L      N      C       "up"    L      N      C
       *     +1   75.0   75.0   75.0       +1   75.0   75.0   75.0
       *      0    0.0   12.5   25.0        0    6.25   8.33  12.5
       *     -1    8.33   4.17   0.0       -1    6.25   8.33  12.5
       *     -2    8.33   4.17   0.0       -2    6.25   8.33   0.0
       *     -3    8.33   4.17   0.0       -3    6.25   0.0    0.0
       */
      if (Inhell && up && u.uhave.amulet && !newdungeon && !portal &&
                        (dunlev(&u.uz) < dunlevs_in_dungeon(&u.uz)-3)) {
            if (!rn2(4)) {
                int odds = 3 + (int)u.ualign.type,          /* 2..4 */
                  diff = odds <= 1 ? 0 : rn2(odds);   /* paranoia */

                if (diff != 0) {
                  assign_rnd_level(newlevel, &u.uz, diff);
                  /* if inside the tower, stay inside */
                  if (was_in_W_tower &&
                      !On_W_tower_level(newlevel)) diff = 0;
                }
                if (diff == 0)
                  assign_level(newlevel, &u.uz);

                new_ledger = ledger_no(newlevel);

                pline("A mysterious force momentarily surrounds you...");
                if (on_level(newlevel, &u.uz)) {
                  (void) safe_teleds();
                  (void) next_to_u();
                  return;
                } else
                  at_stairs = at_ladder = FALSE;
            }
      }

      /* Prevent the player from going past the first quest level unless
       * (s)he has been given the go-ahead by the leader.
       */
      if (on_level(&u.uz, &qstart_level) && !newdungeon && !ok_to_quest()) {
            pline("A mysterious force prevents you from descending.");
            return;
      }

      if (on_level(newlevel, &u.uz)) return;          /* this can happen */

      fd = currentlevel_rewrite();
      if (fd < 0) return;

      if (falling) /* assuming this is only trap door or hole */
          impact_drop((struct obj *)0, u.ux, u.uy, newlevel->dlevel);

      check_special_room(TRUE);           /* probably was a trap door */
      if (Punished) unplacebc();
      u.utrap = 0;                        /* needed in level_tele */
      fill_pit(u.ux, u.uy);
      u.ustuck = 0;                       /* idem */
      u.uinwater = 0;
      keepdogs(FALSE);
      if (u.uswallow)                     /* idem */
            u.uswldtim = u.uswallow = 0;
      /*
       *  We no longer see anything on the level.  Make sure that this
       *  follows u.uswallow set to null since uswallow overrides all
       *  normal vision.
       */
      vision_recalc(2);

      /*
       * Save the level we're leaving.  If we're entering the endgame,
       * we can get rid of all existing levels because they cannot be
       * reached any more.  We still need to use savelev()'s cleanup
       * for the level being left, to recover dynamic memory in use and
       * to avoid dangling timers and light sources.
       */
      cant_go_back = (newdungeon && In_endgame(newlevel));
      if (!cant_go_back) {
          update_mlstmv();    /* current monsters are becoming inactive */
          bufon(fd);          /* use buffered output */
      }
      savelev(fd, ledger_no(&u.uz),
            cant_go_back ? FREE_SAVE : (WRITE_SAVE | FREE_SAVE));
      bclose(fd);
      if (cant_go_back) {
          /* discard unreachable levels; keep #0 */
          for (l_idx = maxledgerno(); l_idx > 0; --l_idx)
            delete_levelfile(l_idx);
      }

#ifdef REINCARNATION
      if (Is_rogue_level(newlevel) || Is_rogue_level(&u.uz))
            assign_rogue_graphics(Is_rogue_level(newlevel));
#endif
#ifdef USE_TILES
      substitute_tiles(newlevel);
#endif
      assign_level(&u.uz0, &u.uz);
      assign_level(&u.uz, newlevel);
      assign_level(&u.utolev, newlevel);
      u.utotype = 0;
      if (dunlev_reached(&u.uz) < dunlev(&u.uz))
            dunlev_reached(&u.uz) = dunlev(&u.uz);
      reset_rndmonst(NON_PM);   /* u.uz change affects monster generation */

      /* set default level change destination areas */
      /* the special level code may override these */
      (void) memset((genericptr_t) &updest, 0, sizeof updest);
      (void) memset((genericptr_t) &dndest, 0, sizeof dndest);

      if (!(level_info[new_ledger].flags & LFILE_EXISTS)) {
            /* entering this level for first time; make it now */
            if (level_info[new_ledger].flags & (FORGOTTEN|VISITED)) {
                impossible("goto_level: returning to discarded level?");
                level_info[new_ledger].flags &= ~(FORGOTTEN|VISITED);
            }
            mklev();
            new = TRUE; /* made the level */
      } else {
            /* returning to previously visited level; reload it */
            fd = open_levelfile(new_ledger);
            if (fd < 0) {
                  pline("Cannot open file (#%d) for level %d (errno %d).",
                              (int) new_ledger, depth(&u.uz), errno);
                  pline("Probably someone removed it.");
                  done(TRICKED);
            }
            minit();    /* ZEROCOMP */
            getlev(fd, hackpid, new_ledger, FALSE);
            (void) close(fd);
      }
      /* do this prior to level-change pline messages */
      vision_reset();         /* clear old level's line-of-sight */
      vision_full_recalc = 0; /* don't let that reenable vision yet */

      if (portal && !In_endgame(&u.uz)) {
          /* find the portal on the new level */
          register struct trap *ttrap;

          for (ttrap = ftrap; ttrap; ttrap = ttrap->ntrap)
            if (ttrap->ttyp == MAGIC_PORTAL) break;

          if (!ttrap) panic("goto_level: no corresponding portal!");
          seetrap(ttrap);
          u_on_newpos(ttrap->tx, ttrap->ty);
      } else if (at_stairs && !In_endgame(&u.uz)) {
          if (up) {
            if (at_ladder) {
                u_on_newpos(xdnladder, ydnladder);
            } else {
                if (newdungeon) {
                  if (Is_stronghold(&u.uz)) {
                      register xchar x, y;

                      do {
                        x = (COLNO - 2 - rnd(5));
                        y = rn1(ROWNO - 4, 3);
                      } while(occupied(x, y) ||
                            IS_WALL(levl[x][y].typ));
                      u_on_newpos(x, y);
                  } else u_on_sstairs();
                } else u_on_dnstairs();
            }
            /* Remove bug which crashes with levitation/punishment  KAA */
            if (Punished && !Levitation) {
                  pline("With great effort you climb the %s.",
                        at_ladder ? "ladder" : "stairs");
            } else if (at_ladder)
                You("climb up the ladder.");
          } else {      /* down */
            if (at_ladder) {
                u_on_newpos(xupladder, yupladder);
            } else {
                if (newdungeon) u_on_sstairs();
                else u_on_upstairs();
            }
            if (u.dz && Flying)
                You("fly down along the %s.",
                  at_ladder ? "ladder" : "stairs");
            else if (u.dz &&
                (near_capacity() > UNENCUMBERED || Punished || Fumbling)) {
                You("fall down the %s.", at_ladder ? "ladder" : "stairs");
                if (Punished) {
                  drag_down();
                  if (carried(uball)) {
                      if (uwep == uball)
                        setuwep((struct obj *)0);
                      if (uswapwep == uball)
                        setuswapwep((struct obj *)0);
                      if (uquiver == uball)
                        setuqwep((struct obj *)0);
                      freeinv(uball);
                  }
                }
                losehp(rnd(3), "falling downstairs", KILLED_BY);
#ifdef STEED
                if (u.usteed) dismount_steed(DISMOUNT_FELL);
#endif
                selftouch("Falling, you");
            } else if (u.dz && at_ladder)
                You("climb down the ladder.");
          }
      } else {    /* trap door or level_tele or In_endgame */
          if (was_in_W_tower && On_W_tower_level(&u.uz))
            /* Stay inside the Wizard's tower when feasible.      */
            /* Note: up vs down doesn't really matter in this case. */
            place_lregion(dndest.nlx, dndest.nly,
                        dndest.nhx, dndest.nhy,
                        0,0, 0,0, LR_DOWNTELE, (d_level *) 0);
          else if (up)
            place_lregion(updest.lx, updest.ly,
                        updest.hx, updest.hy,
                        updest.nlx, updest.nly,
                        updest.nhx, updest.nhy,
                        LR_UPTELE, (d_level *) 0);
          else
            place_lregion(dndest.lx, dndest.ly,
                        dndest.hx, dndest.hy,
                        dndest.nlx, dndest.nly,
                        dndest.nhx, dndest.nhy,
                        LR_DOWNTELE, (d_level *) 0);
          if (falling) {
            if (Punished) ballfall();
            selftouch("Falling, you");
          }
      }

      if (Punished) placebc();
      obj_delivery();         /* before killing geno'd monsters' eggs */
      losedogs();
      kill_genocided_monsters();  /* for those wiped out while in limbo */
      /*
       * Expire all timers that have gone off while away.  Must be
       * after migrating monsters and objects are delivered
       * (losedogs and obj_delivery).
       */
      run_timers();

      initrack();

      if ((mtmp = m_at(u.ux, u.uy)) != 0
#ifdef STEED
            && mtmp != u.usteed
#endif
            ) {
          /* There's a monster at your target destination; it might be one
             which accompanied you--see mon_arrive(dogmove.c)--or perhaps
             it was already here.  Randomly move you to an adjacent spot
             or else the monster to any nearby location.  Prior to 3.3.0
             the latter was done unconditionally. */
          coord cc;

          if (!rn2(2) &&
                enexto(&cc, u.ux, u.uy, youmonst.data) &&
                distu(cc.x, cc.y) <= 2)
            u_on_newpos(cc.x, cc.y);      /*[maybe give message here?]*/
          else
            mnexto(mtmp);

          if ((mtmp = m_at(u.ux, u.uy)) != 0) {
            impossible("mnexto failed (do.c)?");
            rloc(mtmp);
          }
      }

      /* initial movement of bubbles just before vision_recalc */
      if (Is_waterlevel(&u.uz))
            movebubbles();

      if (level_info[new_ledger].flags & FORGOTTEN) {
          forget_map(ALL_MAP);      /* forget the map */
          forget_traps();           /* forget all traps too */
          familiar = TRUE;
          level_info[new_ledger].flags &= ~FORGOTTEN;
      }

      /* Reset the screen. */
      vision_reset();         /* reset the blockages */
      docrt();          /* does a full vision recalc */
      flush_screen(1);

      /*
       *  Move all plines beyond the screen reset.
       */

      /* give room entrance message, if any */
      check_special_room(FALSE);

      /* Check whether we just entered Gehennom. */
      if (!In_hell(&u.uz0) && Inhell) {
          if (Is_valley(&u.uz)) {
            You("arrive at the Valley of the Dead...");
            pline_The("odor of burnt flesh and decay pervades the air.");
#ifdef MICRO
            display_nhwindow(WIN_MESSAGE, FALSE);
#endif
            You_hear("groans and moans everywhere.");
          } else pline("It is hot here.  You smell smoke...");
      }

      if (familiar) {
          static const char *fam_msgs[4] = {
            "You have a sense of deja vu.",
            "You feel like you've been here before.",
            "This place looks familiar...",
            0     /* no message */
          };
          static const char *halu_fam_msgs[4] = {
            "Whoa!  Everything looks different.",
            "You are surrounded by twisty little passages, all alike.",
            "Gee, this looks like uncle Conan's place...",
            0     /* no message */
          };
          const char *mesg;
          int which = rn2(4);

          if (Hallucination)
            mesg = halu_fam_msgs[which];
          else
            mesg = fam_msgs[which];
          if (mesg) pline(mesg);
      }

#ifdef REINCARNATION
      if (new && Is_rogue_level(&u.uz))
          You("enter what seems to be an older, more primitive world.");
#endif
      /* Final confrontation */
      if (In_endgame(&u.uz) && newdungeon && u.uhave.amulet)
            resurrect();
      if (newdungeon && In_V_tower(&u.uz) && In_hell(&u.uz0))
            pline_The("heat and smoke are gone.");

      /* the message from your quest leader */
      if (!In_quest(&u.uz0) && at_dgn_entrance("The Quest") &&
            !(u.uevent.qexpelled || u.uevent.qcompleted || leaderless())) {

            if (u.uevent.qcalled) {
                  com_pager(Role_if(PM_ROGUE) ? 4 : 3);
            } else {
                  com_pager(2);
                  u.uevent.qcalled = TRUE;
            }
      }

      /* once Croesus is dead, his alarm doesn't work any more */
      if (Is_knox(&u.uz) && (new || !mvitals[PM_CROESUS].died)) {
            You("penetrated a high security area!");
            pline("An alarm sounds!");
            for(mtmp = fmon; mtmp; mtmp = mtmp->nmon)
                if (!DEADMONSTER(mtmp) && mtmp->msleeping) mtmp->msleeping = 0;
      }

      if (on_level(&u.uz, &astral_level))
          final_level();
      else
          onquest();
      assign_level(&u.uz0, &u.uz); /* reset u.uz0 */

#ifdef INSURANCE
      save_currentstate();
#endif

      (void) pickup(1);
}

STATIC_OVL void
final_level()
{
      struct monst *mtmp;
      struct obj *otmp;
      coord mm;
      int i;

      /* reset monster hostility relative to player */
      for (mtmp = fmon; mtmp; mtmp = mtmp->nmon)
          if (!DEADMONSTER(mtmp)) reset_hostility(mtmp);

      /* create some player-monsters */
      create_mplayers(rn1(4, 3), TRUE);

      /* create a guardian angel next to player, if worthy */
      if (Conflict) {
          pline(
           "A voice booms: \"Thy desire for conflict shall be fulfilled!\"");
          for (i = rnd(4); i > 0; --i) {
            mm.x = u.ux;
            mm.y = u.uy;
            if (enexto(&mm, mm.x, mm.y, &mons[PM_ANGEL]))
                (void) mk_roamer(&mons[PM_ANGEL], u.ualign.type,
                             mm.x, mm.y, FALSE);
          }

      } else if (u.ualign.record > 8) {   /* fervent */
          pline("A voice whispers: \"Thou hast been worthy of me!\"");
          mm.x = u.ux;
          mm.y = u.uy;
          if (enexto(&mm, mm.x, mm.y, &mons[PM_ANGEL])) {
            if ((mtmp = mk_roamer(&mons[PM_ANGEL], u.ualign.type,
                              mm.x, mm.y, TRUE)) != 0) {
                if (!Blind)
                  pline("An angel appears near you.");
                else
                  You_feel("the presence of a friendly angel near you.");
                /* guardian angel -- the one case mtame doesn't
                 * imply an edog structure, so we don't want to
                 * call tamedog().
                 */
                mtmp->mtame = 10;
                /* make him strong enough vs. endgame foes */
                mtmp->m_lev = rn1(8,15);
                mtmp->mhp = mtmp->mhpmax =
                              d((int)mtmp->m_lev,10) + 30 + rnd(30);
                if ((otmp = select_hwep(mtmp)) == 0) {
                  otmp = mksobj(SILVER_SABER, FALSE, FALSE);
                  if (mpickobj(mtmp, otmp))
                      panic("merged weapon?");
                }
                bless(otmp);
                if (otmp->spe < 4) otmp->spe += rnd(4);
                if ((otmp = which_armor(mtmp, W_ARMS)) == 0 ||
                      otmp->otyp != SHIELD_OF_REFLECTION) {
                  (void) mongets(mtmp, AMULET_OF_REFLECTION);
                  m_dowear(mtmp, TRUE);
                }
            }
          }
      }
}

static char *dfr_pre_msg = 0, /* pline() before level change */
          *dfr_post_msg = 0;  /* pline() after level change */

/* change levels at the end of this turn, after monsters finish moving */
void
schedule_goto(tolev, at_stairs, falling, portal_flag, pre_msg, post_msg)
d_level *tolev;
boolean at_stairs, falling;
int portal_flag;
const char *pre_msg, *post_msg;
{
      int typmask = 0100;           /* non-zero triggers `deferred_goto' */

      /* destination flags (`goto_level' args) */
      if (at_stairs)     typmask |= 1;
      if (falling)       typmask |= 2;
      if (portal_flag) typmask |= 4;
      if (portal_flag < 0) typmask |= 0200;     /* flag for portal removal */
      u.utotype = typmask;
      /* destination level */
      assign_level(&u.utolev, tolev);

      if (pre_msg)
          dfr_pre_msg = strcpy((char *)alloc(strlen(pre_msg) + 1), pre_msg);
      if (post_msg)
          dfr_post_msg = strcpy((char *)alloc(strlen(post_msg)+1), post_msg);
}

/* handle something like portal ejection */
void
deferred_goto()
{
      if (!on_level(&u.uz, &u.utolev)) {
          d_level dest;
          int typmask = u.utotype; /* save it; goto_level zeroes u.utotype */

          assign_level(&dest, &u.utolev);
          if (dfr_pre_msg) pline(dfr_pre_msg);
          goto_level(&dest, !!(typmask&1), !!(typmask&2), !!(typmask&4));
          if (typmask & 0200) {     /* remove portal */
            struct trap *t = t_at(u.ux, u.uy);

            if (t) {
                deltrap(t);
                newsym(u.ux, u.uy);
            }
          }
          if (dfr_post_msg) pline(dfr_post_msg);
      }
      u.utotype = 0;          /* our caller keys off of this */
      if (dfr_pre_msg)
          free((genericptr_t)dfr_pre_msg),  dfr_pre_msg = 0;
      if (dfr_post_msg)
          free((genericptr_t)dfr_post_msg),  dfr_post_msg = 0;
}

#endif /* OVL2 */
#ifdef OVL3

/*
 * Return TRUE if we created a monster for the corpse.  If successful, the
 * corpse is gone.
 */
boolean
revive_corpse(corpse)
struct obj *corpse;
{
    struct monst *mtmp, *mcarry;
    boolean is_uwep, chewed;
    xchar where;
    char *cname, cname_buf[BUFSZ];

    where = corpse->where;
    is_uwep = corpse == uwep;
    cname = eos(strcpy(cname_buf, "bite-covered "));
    Strcpy(cname, corpse_xname(corpse, TRUE));
    mcarry = (where == OBJ_MINVENT) ? corpse->ocarry : 0;
    mtmp = revive(corpse);    /* corpse is gone if successful */

    if (mtmp) {
      chewed = (mtmp->mhp < mtmp->mhpmax);
      if (chewed) cname = cname_buf;      /* include "bite-covered" prefix */
      switch (where) {
          case OBJ_INVENT:
            if (is_uwep)
                pline_The("%s writhes out of your grasp!", cname);
            else
                You_feel("squirming in your backpack!");
            break;

          case OBJ_FLOOR:
            if (cansee(mtmp->mx, mtmp->my))
                pline("%s rises from the dead!", chewed ?
                    Adjmonnam(mtmp, "bite-covered") : Monnam(mtmp));
            break;

          case OBJ_MINVENT:         /* probably a nymph's */
            if (cansee(mtmp->mx, mtmp->my)) {
                if (canseemon(mcarry))
                  pline("Startled, %s drops %s as it revives!",
                        mon_nam(mcarry), an(cname));
                else
                  pline("%s suddenly appears!", chewed ?
                        Adjmonnam(mtmp, "bite-covered") : Monnam(mtmp));
            }
            break;

          default:
            /* we should be able to handle the other cases... */
            impossible("revive_corpse: lost corpse @ %d", where);
            break;
      }
      return TRUE;
    }
    return FALSE;
}

/* Revive the corpse via a timeout. */
/*ARGSUSED*/
void
revive_mon(arg, timeout)
genericptr_t arg;
long timeout;
{
    struct obj *body = (struct obj *) arg;

    /* if we succeed, the corpse is gone, otherwise, rot it away */
    if (!revive_corpse(body)) {
      if (is_rider(&mons[body->corpsenm]))
          You_feel("less hassled.");
      (void) start_timer(250L - (monstermoves-body->age),
                              TIMER_OBJECT, ROT_CORPSE, arg);
    }
}

int
donull()
{
      return(1);  /* Do nothing, but let other things happen */
}

#endif /* OVL3 */
#ifdef OVLB

STATIC_PTR int
wipeoff()
{
      if(u.ucreamed < 4)      u.ucreamed = 0;
      else              u.ucreamed -= 4;
      if (Blinded < 4)  Blinded = 0;
      else              Blinded -= 4;
      if (!Blinded) {
            pline("You've got the glop off.");
            u.ucreamed = 0;
            Blinded = 1;
            make_blinded(0L,TRUE);
            return(0);
      } else if (!u.ucreamed) {
            Your("%s feels clean now.", body_part(FACE));
            return(0);
      }
      return(1);        /* still busy */
}

int
dowipe()
{
      if(u.ucreamed)  {
            static NEARDATA char buf[39];

            Sprintf(buf, "wiping off your %s", body_part(FACE));
            set_occupation(wipeoff, buf, 0);
            /* Not totally correct; what if they change back after now
             * but before they're finished wiping?
             */
            return(1);
      }
      Your("%s is already clean.", body_part(FACE));
      return(1);
}

void
set_wounded_legs(side, timex)
register long side;
register int timex;
{
      /* KMH -- STEED
       * If you are riding, your steed gets the wounded legs instead.
       * You still call this function, but don't lose hp.
       * Caller is also responsible for adjusting messages.
       */

      if(!Wounded_legs) {
            ATEMP(A_DEX)--;
            flags.botl = 1;
      }

      if(!Wounded_legs || (HWounded_legs & TIMEOUT))
            HWounded_legs = timex;
      EWounded_legs = side;
      (void)encumber_msg();
}

void
heal_legs()
{
      if(Wounded_legs) {
            if (ATEMP(A_DEX) < 0) {
                  ATEMP(A_DEX)++;
                  flags.botl = 1;
            }

#ifdef STEED
            if (!u.usteed)
#endif
            {
                  /* KMH, intrinsics patch */
                  if((EWounded_legs & BOTH_SIDES) == BOTH_SIDES) {
                  Your("%s feel somewhat better.",
                        makeplural(body_part(LEG)));
            } else {
                  Your("%s feels somewhat better.",
                        body_part(LEG));
            }
            }
            HWounded_legs = EWounded_legs = 0;
      }
      (void)encumber_msg();
}

#endif /* OVLB */

/*do.c*/

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