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mon.c
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mon.c
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/* NetHack 3.6 mon.c $NHDT-Date: 1569276991 2019/09/23 22:16:31 $ $NHDT-Branch: NetHack-3.6 $:$NHDT-Revision: 1.297 $ */
/* Copyright (c) Stichting Mathematisch Centrum, Amsterdam, 1985. */
/*-Copyright (c) Derek S. Ray, 2015. */
/* NetHack may be freely redistributed. See license for details. */
/* If you're using precompiled headers, you don't want this either */
#ifdef MICROPORT_BUG
#define MKROOM_H
#endif
#include "hack.h"
#include "mfndpos.h"
#include <ctype.h>
STATIC_VAR boolean vamp_rise_msg, disintegested;
STATIC_DCL void FDECL(sanity_check_single_mon, (struct monst *, BOOLEAN_P,
const char *));
STATIC_DCL boolean FDECL(restrap, (struct monst *));
STATIC_DCL long FDECL(mm_aggression, (struct monst *, struct monst *));
STATIC_DCL long FDECL(mm_displacement, (struct monst *, struct monst *));
STATIC_DCL int NDECL(pick_animal);
STATIC_DCL void FDECL(kill_eggs, (struct obj *));
STATIC_DCL int FDECL(pickvampshape, (struct monst *));
STATIC_DCL boolean FDECL(isspecmon, (struct monst *));
STATIC_DCL boolean FDECL(validspecmon, (struct monst *, int));
STATIC_DCL struct permonst *FDECL(accept_newcham_form, (struct monst *, int));
STATIC_DCL struct obj *FDECL(make_corpse, (struct monst *, unsigned));
STATIC_DCL void FDECL(m_detach, (struct monst *, struct permonst *));
STATIC_DCL void FDECL(lifesaved_monster, (struct monst *));
STATIC_DCL void FDECL(migrate_mon, (struct monst *, XCHAR_P, XCHAR_P));
STATIC_DCL boolean FDECL(ok_to_obliterate, (struct monst *));
STATIC_DCL void FDECL(deal_with_overcrowding, (struct monst *));
/* note: duplicated in dog.c */
#define LEVEL_SPECIFIC_NOCORPSE(mdat) \
(Is_rogue_level(&u.uz) \
|| (level.flags.graveyard && is_undead(mdat) && rn2(3)))
#if 0
/* part of the original warning code which was replaced in 3.3.1 */
const char *warnings[] = {
"white", "pink", "red", "ruby", "purple", "black"
};
#endif /* 0 */
STATIC_OVL void
sanity_check_single_mon(mtmp, chk_geno, msg)
struct monst *mtmp;
boolean chk_geno;
const char *msg;
{
if (mtmp->data < &mons[LOW_PM] || mtmp->data >= &mons[NUMMONS]) {
impossible("illegal mon data %s; mnum=%d (%s)",
fmt_ptr((genericptr_t) mtmp->data), mtmp->mnum, msg);
} else {
int mndx = monsndx(mtmp->data);
if (mtmp->mnum != mndx) {
impossible("monster mnum=%d, monsndx=%d (%s)",
mtmp->mnum, mndx, msg);
mtmp->mnum = mndx;
}
if (DEADMONSTER(mtmp)) {
#if 0
/* bad if not fmons list or if not vault guard */
if (strcmp(msg, "fmon") || !mtmp->isgd)
impossible("dead monster on %s; %s at <%d,%d>",
msg, mons[mndx].mname, mtmp->mx, mtmp->my);
#endif
return;
}
if (chk_geno && (mvitals[mndx].mvflags & G_GENOD) != 0)
impossible("genocided %s in play (%s)", mons[mndx].mname, msg);
}
if (mtmp->isshk && !has_eshk(mtmp))
impossible("shk without eshk (%s)", msg);
if (mtmp->ispriest && !has_epri(mtmp))
impossible("priest without epri (%s)", msg);
if (mtmp->isgd && !has_egd(mtmp))
impossible("guard without egd (%s)", msg);
if (mtmp->isminion && !has_emin(mtmp))
impossible("minion without emin (%s)", msg);
/* guardian angel on astral level is tame but has emin rather than edog */
if (mtmp->mtame && !has_edog(mtmp) && !mtmp->isminion)
impossible("pet without edog (%s)", msg);
}
void
mon_sanity_check()
{
int x, y;
struct monst *mtmp, *m;
for (mtmp = fmon; mtmp; mtmp = mtmp->nmon) {
/* dead monsters should still have sane data */
sanity_check_single_mon(mtmp, TRUE, "fmon");
if (DEADMONSTER(mtmp) && !mtmp->isgd)
continue;
x = mtmp->mx, y = mtmp->my;
if (!isok(x, y) && !(mtmp->isgd && x == 0 && y == 0)) {
impossible("mon (%s) claims to be at <%d,%d>?",
fmt_ptr((genericptr_t) mtmp), x, y);
} else if (mtmp == u.usteed) {
/* steed is in fmon list but not on the map; its
<mx,my> coordinates should match hero's location */
if (x != u.ux || y != u.uy)
impossible("steed (%s) claims to be at <%d,%d>?",
fmt_ptr((genericptr_t) mtmp), x, y);
} else if (level.monsters[x][y] != mtmp) {
impossible("mon (%s) at <%d,%d> is not there!",
fmt_ptr((genericptr_t) mtmp), x, y);
} else if (mtmp->wormno) {
sanity_check_worm(mtmp);
}
}
for (x = 1; x < COLNO; x++)
for (y = 0; y < ROWNO; y++)
if ((mtmp = level.monsters[x][y]) != 0) {
for (m = fmon; m; m = m->nmon)
if (m == mtmp)
break;
if (!m)
impossible("map mon (%s) at <%d,%d> not in fmon list!",
fmt_ptr((genericptr_t) mtmp), x, y);
else if (mtmp == u.usteed)
impossible("steed (%s) is on the map at <%d,%d>!",
fmt_ptr((genericptr_t) mtmp), x, y);
else if ((mtmp->mx != x || mtmp->my != y)
&& mtmp->data != &mons[PM_LONG_WORM])
impossible("map mon (%s) at <%d,%d> is found at <%d,%d>?",
fmt_ptr((genericptr_t) mtmp),
mtmp->mx, mtmp->my, x, y);
}
for (mtmp = migrating_mons; mtmp; mtmp = mtmp->nmon) {
sanity_check_single_mon(mtmp, FALSE, "migr");
}
}
/* convert the monster index of an undead to its living counterpart */
int
undead_to_corpse(mndx)
int mndx;
{
switch (mndx) {
case PM_KOBOLD_ZOMBIE:
case PM_KOBOLD_MUMMY:
mndx = PM_KOBOLD;
break;
case PM_DWARF_ZOMBIE:
case PM_DWARF_MUMMY:
mndx = PM_DWARF;
break;
case PM_GNOME_ZOMBIE:
case PM_GNOME_MUMMY:
mndx = PM_GNOME;
break;
case PM_ORC_ZOMBIE:
case PM_ORC_MUMMY:
mndx = PM_ORC;
break;
case PM_ELF_ZOMBIE:
case PM_ELF_MUMMY:
mndx = PM_ELF;
break;
case PM_VAMPIRE:
case PM_VAMPIRE_LORD:
#if 0 /* DEFERRED */
case PM_VAMPIRE_MAGE:
#endif
case PM_HUMAN_ZOMBIE:
case PM_HUMAN_MUMMY:
mndx = PM_HUMAN;
break;
case PM_GIANT_ZOMBIE:
case PM_GIANT_MUMMY:
mndx = PM_GIANT;
break;
case PM_ETTIN_ZOMBIE:
case PM_ETTIN_MUMMY:
mndx = PM_ETTIN;
break;
default:
break;
}
return mndx;
}
/* Convert the monster index of some monsters (such as quest guardians)
* to their generic species type.
*
* Return associated character class monster, rather than species
* if mode is 1.
*/
int
genus(mndx, mode)
int mndx, mode;
{
switch (mndx) {
/* Quest guardians */
case PM_STUDENT:
mndx = mode ? PM_ARCHEOLOGIST : PM_HUMAN;
break;
case PM_CHIEFTAIN:
mndx = mode ? PM_BARBARIAN : PM_HUMAN;
break;
case PM_NEANDERTHAL:
mndx = mode ? PM_CAVEMAN : PM_HUMAN;
break;
case PM_ATTENDANT:
mndx = mode ? PM_HEALER : PM_HUMAN;
break;
case PM_PAGE:
mndx = mode ? PM_KNIGHT : PM_HUMAN;
break;
case PM_ABBOT:
mndx = mode ? PM_MONK : PM_HUMAN;
break;
case PM_ACOLYTE:
mndx = mode ? PM_PRIEST : PM_HUMAN;
break;
case PM_HUNTER:
mndx = mode ? PM_RANGER : PM_HUMAN;
break;
case PM_THUG:
mndx = mode ? PM_ROGUE : PM_HUMAN;
break;
case PM_ROSHI:
mndx = mode ? PM_SAMURAI : PM_HUMAN;
break;
case PM_GUIDE:
mndx = mode ? PM_TOURIST : PM_HUMAN;
break;
case PM_APPRENTICE:
mndx = mode ? PM_WIZARD : PM_HUMAN;
break;
case PM_WARRIOR:
mndx = mode ? PM_VALKYRIE : PM_HUMAN;
break;
default:
if (mndx >= LOW_PM && mndx < NUMMONS) {
struct permonst *ptr = &mons[mndx];
if (is_human(ptr))
mndx = PM_HUMAN;
else if (is_elf(ptr))
mndx = PM_ELF;
else if (is_dwarf(ptr))
mndx = PM_DWARF;
else if (is_gnome(ptr))
mndx = PM_GNOME;
else if (is_orc(ptr))
mndx = PM_ORC;
}
break;
}
return mndx;
}
/* return monster index if chameleon, or NON_PM if not */
int
pm_to_cham(mndx)
int mndx;
{
int mcham = NON_PM;
/*
* As of 3.6.0 we just check M2_SHAPESHIFTER instead of having a
* big switch statement with hardcoded shapeshifter types here.
*/
if (mndx >= LOW_PM && is_shapeshifter(&mons[mndx]))
mcham = mndx;
return mcham;
}
/* for deciding whether corpse will carry along full monster data */
#define KEEPTRAITS(mon) \
((mon)->isshk || (mon)->mtame || unique_corpstat((mon)->data) \
|| is_reviver((mon)->data) \
/* normally quest leader will be unique, */ \
/* but he or she might have been polymorphed */ \
|| (mon)->m_id == quest_status.leader_m_id \
/* special cancellation handling for these */ \
|| (dmgtype((mon)->data, AD_SEDU) || dmgtype((mon)->data, AD_SSEX)))
/* Creates a monster corpse, a "special" corpse, or nothing if it doesn't
* leave corpses. Monsters which leave "special" corpses should have
* G_NOCORPSE set in order to prevent wishing for one, finding tins of one,
* etc....
*/
STATIC_OVL struct obj *
make_corpse(mtmp, corpseflags)
register struct monst *mtmp;
unsigned corpseflags;
{
register struct permonst *mdat = mtmp->data;
int num;
struct obj *obj = (struct obj *) 0;
struct obj *otmp = (struct obj *) 0;
int x = mtmp->mx, y = mtmp->my;
int mndx = monsndx(mdat);
unsigned corpstatflags = corpseflags;
boolean burythem = ((corpstatflags & CORPSTAT_BURIED) != 0);
switch (mndx) {
case PM_GRAY_DRAGON:
case PM_SILVER_DRAGON:
#if 0 /* DEFERRED */
case PM_SHIMMERING_DRAGON:
#endif
case PM_RED_DRAGON:
case PM_ORANGE_DRAGON:
case PM_WHITE_DRAGON:
case PM_BLACK_DRAGON:
case PM_BLUE_DRAGON:
case PM_GREEN_DRAGON:
case PM_YELLOW_DRAGON:
/* Make dragon scales. This assumes that the order of the
dragons is the same as the order of the scales. */
if (!rn2(mtmp->mrevived ? 20 : 3)) {
num = GRAY_DRAGON_SCALES + monsndx(mdat) - PM_GRAY_DRAGON;
obj = mksobj_at(num, x, y, FALSE, FALSE);
obj->spe = 0;
obj->cursed = obj->blessed = FALSE;
}
goto default_1;
case PM_WHITE_UNICORN:
case PM_GRAY_UNICORN:
case PM_BLACK_UNICORN:
if (mtmp->mrevived && rn2(2)) {
if (canseemon(mtmp))
pline("%s recently regrown horn crumbles to dust.",
s_suffix(Monnam(mtmp)));
} else {
obj = mksobj_at(UNICORN_HORN, x, y, TRUE, FALSE);
if (obj && mtmp->mrevived)
obj->degraded_horn = 1;
}
goto default_1;
case PM_LONG_WORM:
(void) mksobj_at(WORM_TOOTH, x, y, TRUE, FALSE);
goto default_1;
case PM_VAMPIRE:
case PM_VAMPIRE_LORD:
/* include mtmp in the mkcorpstat() call */
num = undead_to_corpse(mndx);
corpstatflags |= CORPSTAT_INIT;
obj = mkcorpstat(CORPSE, mtmp, &mons[num], x, y, corpstatflags);
obj->age -= 100; /* this is an *OLD* corpse */
break;
case PM_KOBOLD_MUMMY:
case PM_DWARF_MUMMY:
case PM_GNOME_MUMMY:
case PM_ORC_MUMMY:
case PM_ELF_MUMMY:
case PM_HUMAN_MUMMY:
case PM_GIANT_MUMMY:
case PM_ETTIN_MUMMY:
case PM_KOBOLD_ZOMBIE:
case PM_DWARF_ZOMBIE:
case PM_GNOME_ZOMBIE:
case PM_ORC_ZOMBIE:
case PM_ELF_ZOMBIE:
case PM_HUMAN_ZOMBIE:
case PM_GIANT_ZOMBIE:
case PM_ETTIN_ZOMBIE:
num = undead_to_corpse(mndx);
corpstatflags |= CORPSTAT_INIT;
obj = mkcorpstat(CORPSE, mtmp, &mons[num], x, y, corpstatflags);
obj->age -= 100; /* this is an *OLD* corpse */
break;
case PM_IRON_GOLEM:
num = d(2, 6);
while (num--)
obj = mksobj_at(IRON_CHAIN, x, y, TRUE, FALSE);
free_mname(mtmp); /* don't christen obj */
break;
case PM_GLASS_GOLEM:
num = d(2, 4); /* very low chance of creating all glass gems */
while (num--)
obj = mksobj_at((LAST_GEM + rnd(9)), x, y, TRUE, FALSE);
free_mname(mtmp);
break;
case PM_CLAY_GOLEM:
obj = mksobj_at(ROCK, x, y, FALSE, FALSE);
obj->quan = (long) (rn2(20) + 50);
obj->owt = weight(obj);
free_mname(mtmp);
break;
case PM_STONE_GOLEM:
corpstatflags &= ~CORPSTAT_INIT;
obj =
mkcorpstat(STATUE, (struct monst *) 0, mdat, x, y, corpstatflags);
break;
case PM_WOOD_GOLEM:
num = d(2, 4);
while (num--) {
obj = mksobj_at(QUARTERSTAFF, x, y, TRUE, FALSE);
}
free_mname(mtmp);
break;
case PM_LEATHER_GOLEM:
num = d(2, 4);
while (num--)
obj = mksobj_at(LEATHER_ARMOR, x, y, TRUE, FALSE);
free_mname(mtmp);
break;
case PM_GOLD_GOLEM:
/* Good luck gives more coins */
obj = mkgold((long) (200 - rnl(101)), x, y);
free_mname(mtmp);
break;
case PM_PAPER_GOLEM:
num = rnd(4);
while (num--)
obj = mksobj_at(SCR_BLANK_PAPER, x, y, TRUE, FALSE);
free_mname(mtmp);
break;
/* expired puddings will congeal into a large blob;
like dragons, relies on the order remaining consistent */
case PM_GRAY_OOZE:
case PM_BROWN_PUDDING:
case PM_GREEN_SLIME:
case PM_BLACK_PUDDING:
/* we have to do this here because most other places
expect there to be an object coming back; not this one */
obj = mksobj_at(GLOB_OF_BLACK_PUDDING - (PM_BLACK_PUDDING - mndx),
x, y, TRUE, FALSE);
while (obj && (otmp = obj_nexto(obj)) != (struct obj *) 0) {
pudding_merge_message(obj, otmp);
obj = obj_meld(&obj, &otmp);
}
free_mname(mtmp);
return obj;
default_1:
default:
if (mvitals[mndx].mvflags & G_NOCORPSE) {
return (struct obj *) 0;
} else {
corpstatflags |= CORPSTAT_INIT;
/* preserve the unique traits of some creatures */
obj = mkcorpstat(CORPSE, KEEPTRAITS(mtmp) ? mtmp : 0,
mdat, x, y, corpstatflags);
if (burythem) {
boolean dealloc;
(void) bury_an_obj(obj, &dealloc);
newsym(x, y);
return dealloc ? (struct obj *) 0 : obj;
}
}
break;
}
/* All special cases should precede the G_NOCORPSE check */
if (!obj)
return (struct obj *) 0;
/* if polymorph or undead turning has killed this monster,
prevent the same attack beam from hitting its corpse */
if (context.bypasses)
bypass_obj(obj);
if (has_mname(mtmp))
obj = oname(obj, MNAME(mtmp));
/* Avoid "It was hidden under a green mold corpse!"
* during Blind combat. An unseen monster referred to as "it"
* could be killed and leave a corpse. If a hider then hid
* underneath it, you could be told the corpse type of a
* monster that you never knew was there without this.
* The code in hitmu() substitutes the word "something"
* if the corpse's obj->dknown is 0.
*/
if (Blind && !sensemon(mtmp))
obj->dknown = 0;
stackobj(obj);
newsym(x, y);
return obj;
}
/* check mtmp and water/lava for compatibility, 0 (survived), 1 (died) */
int
minliquid(mtmp)
register struct monst *mtmp;
{
boolean inpool, inlava, infountain;
/* [ceiling clingers are handled below] */
inpool = (is_pool(mtmp->mx, mtmp->my)
&& (!(is_flyer(mtmp->data) || is_floater(mtmp->data))
/* there's no "above the surface" on the plane of water */
|| Is_waterlevel(&u.uz)));
inlava = (is_lava(mtmp->mx, mtmp->my)
&& !(is_flyer(mtmp->data) || is_floater(mtmp->data)));
infountain = IS_FOUNTAIN(levl[mtmp->mx][mtmp->my].typ);
/* Flying and levitation keeps our steed out of the liquid
(but not water-walking or swimming; note: if hero is in a
water location on the Plane of Water, flight and levitating
are blocked so this (Flying || Levitation) test fails there
and steed will be subject to water effects, as intended) */
if (mtmp == u.usteed && (Flying || Levitation))
return 0;
/* Gremlin multiplying won't go on forever since the hit points
* keep going down, and when it gets to 1 hit point the clone
* function will fail.
*/
if (mtmp->data == &mons[PM_GREMLIN] && (inpool || infountain) && rn2(3)) {
if (split_mon(mtmp, (struct monst *) 0))
dryup(mtmp->mx, mtmp->my, FALSE);
if (inpool)
water_damage_chain(mtmp->minvent, FALSE);
return 0;
} else if (mtmp->data == &mons[PM_IRON_GOLEM] && inpool && !rn2(5)) {
int dam = d(2, 6);
if (cansee(mtmp->mx, mtmp->my))
pline("%s rusts.", Monnam(mtmp));
mtmp->mhp -= dam;
if (mtmp->mhpmax > dam)
mtmp->mhpmax -= dam;
if (DEADMONSTER(mtmp)) {
mondead(mtmp);
if (DEADMONSTER(mtmp))
return 1;
}
water_damage_chain(mtmp->minvent, FALSE);
return 0;
}
if (inlava) {
/*
* Lava effects much as water effects. Lava likers are able to
* protect their stuff. Fire resistant monsters can only protect
* themselves --ALI
*/
if (!is_clinger(mtmp->data) && !likes_lava(mtmp->data)) {
/* not fair...? hero doesn't automatically teleport away
from lava, just from water */
if (can_teleport(mtmp->data) && !tele_restrict(mtmp)) {
if (rloc(mtmp, TRUE))
return 0;
}
if (!resists_fire(mtmp)) {
if (cansee(mtmp->mx, mtmp->my)) {
struct attack *dummy = &mtmp->data->mattk[0];
const char *how = on_fire(mtmp->data, dummy);
pline("%s %s.", Monnam(mtmp),
!strcmp(how, "boiling") ? "boils away"
: !strcmp(how, "melting") ? "melts away"
: "burns to a crisp");
}
/* unlike fire -> melt ice -> pool, there's no way for the
hero to create lava beneath a monster, so the !mon_moving
case is not expected to happen (and we haven't made a
player-against-monster variation of the message above) */
if (context.mon_moving)
mondead(mtmp);
else
xkilled(mtmp, XKILL_NOMSG);
} else {
mtmp->mhp -= 1;
if (DEADMONSTER(mtmp)) {
if (cansee(mtmp->mx, mtmp->my))
pline("%s surrenders to the fire.", Monnam(mtmp));
mondead(mtmp);
} else if (cansee(mtmp->mx, mtmp->my))
pline("%s burns slightly.", Monnam(mtmp));
}
if (!DEADMONSTER(mtmp)) {
(void) fire_damage_chain(mtmp->minvent, FALSE, FALSE,
mtmp->mx, mtmp->my);
(void) rloc(mtmp, FALSE);
return 0;
}
return 1;
}
} else if (inpool) {
/* Most monsters drown in pools. flooreffects() will take care of
* water damage to dead monsters' inventory, but survivors need to
* be handled here. Swimmers are able to protect their stuff...
*/
if (!is_clinger(mtmp->data) && !is_swimmer(mtmp->data)
&& !amphibious(mtmp->data)) {
/* like hero with teleport intrinsic or spell, teleport away
if possible */
if (can_teleport(mtmp->data) && !tele_restrict(mtmp)) {
if (rloc(mtmp, TRUE))
return 0;
}
if (cansee(mtmp->mx, mtmp->my)) {
if (context.mon_moving)
pline("%s drowns.", Monnam(mtmp));
else
/* hero used fire to melt ice that monster was on */
You("drown %s.", mon_nam(mtmp));
}
if (u.ustuck && u.uswallow && u.ustuck == mtmp) {
/* This can happen after a purple worm plucks you off a
flying steed while you are over water. */
pline("%s sinks as %s rushes in and flushes you out.",
Monnam(mtmp), hliquid("water"));
}
if (context.mon_moving)
mondead(mtmp);
else
xkilled(mtmp, XKILL_NOMSG);
if (!DEADMONSTER(mtmp)) {
water_damage_chain(mtmp->minvent, FALSE);
if (!rloc(mtmp, TRUE))
deal_with_overcrowding(mtmp);
return 0;
}
return 1;
}
} else {
/* but eels have a difficult time outside */
if (mtmp->data->mlet == S_EEL && !Is_waterlevel(&u.uz)) {
/* as mhp gets lower, the rate of further loss slows down */
if (mtmp->mhp > 1 && rn2(mtmp->mhp) > rn2(8))
mtmp->mhp--;
monflee(mtmp, 2, FALSE, FALSE);
}
}
return 0;
}
int
mcalcmove(mon)
struct monst *mon;
{
int mmove = mon->data->mmove;
int mmove_adj;
/* Note: MSLOW's `+ 1' prevents slowed speed 1 getting reduced to 0;
* MFAST's `+ 2' prevents hasted speed 1 from becoming a no-op;
* both adjustments have negligible effect on higher speeds.
*/
if (mon->mspeed == MSLOW)
mmove = (2 * mmove + 1) / 3;
else if (mon->mspeed == MFAST)
mmove = (4 * mmove + 2) / 3;
if (mon == u.usteed && u.ugallop && context.mv) {
/* increase movement by a factor of 1.5; also increase variance of
movement speed (if it's naturally 24, we don't want it to always
become 36) */
mmove = ((rn2(2) ? 4 : 5) * mmove) / 3;
}
/* Randomly round the monster's speed to a multiple of NORMAL_SPEED.
This makes it impossible for the player to predict when they'll get
a free turn (thus preventing exploits like "melee kiting"), while
retaining guarantees about shopkeepers not being outsped by a
normal-speed player, normal-speed players being unable to open up
a gap when fleeing a normal-speed monster, etc. */
mmove_adj = mmove % NORMAL_SPEED;
mmove -= mmove_adj;
if (rn2(NORMAL_SPEED) < mmove_adj)
mmove += NORMAL_SPEED;
return mmove;
}
/* actions that happen once per ``turn'', regardless of each
individual monster's metabolism; some of these might need to
be reclassified to occur more in proportion with movement rate */
void
mcalcdistress()
{
struct monst *mtmp;
for (mtmp = fmon; mtmp; mtmp = mtmp->nmon) {
if (DEADMONSTER(mtmp))
continue;
/* must check non-moving monsters once/turn in case they managed
to end up in water or lava; note: when not in liquid they regen,
shape-shift, timeout temporary maladies just like other monsters */
if (mtmp->data->mmove == 0) {
if (vision_full_recalc)
vision_recalc(0);
if (minliquid(mtmp))
continue;
}
/* regenerate hit points */
mon_regen(mtmp, FALSE);
/* possibly polymorph shapechangers and lycanthropes */
if (mtmp->cham >= LOW_PM)
decide_to_shapeshift(mtmp, (canspotmon(mtmp)
|| (u.uswallow && mtmp == u.ustuck))
? SHIFT_MSG : 0);
were_change(mtmp);
/* gradually time out temporary problems */
if (mtmp->mblinded && !--mtmp->mblinded)
mtmp->mcansee = 1;
if (mtmp->mfrozen && !--mtmp->mfrozen)
mtmp->mcanmove = 1;
if (mtmp->mfleetim && !--mtmp->mfleetim)
mtmp->mflee = 0;
/* FIXME: mtmp->mlstmv ought to be updated here */
}
}
int
movemon()
{
register struct monst *mtmp, *nmtmp;
register boolean somebody_can_move = FALSE;
/*
* Some of you may remember the former assertion here that
* because of deaths and other actions, a simple one-pass
* algorithm wasn't possible for movemon. Deaths are no longer
* removed to the separate list fdmon; they are simply left in
* the chain with hit points <= 0, to be cleaned up at the end
* of the pass.
*
* The only other actions which cause monsters to be removed from
* the chain are level migrations and losedogs(). I believe losedogs()
* is a cleanup routine not associated with monster movements, and
* monsters can only affect level migrations on themselves, not others
* (hence the fetching of nmon before moving the monster). Currently,
* monsters can jump into traps, read cursed scrolls of teleportation,
* and drink cursed potions of raise level to change levels. These are
* all reflexive at this point. Should one monster be able to level
* teleport another, this scheme would have problems.
*/
for (mtmp = fmon; mtmp; mtmp = nmtmp) {
/* end monster movement early if hero is flagged to leave the level */
if (u.utotype
#ifdef SAFERHANGUP
/* or if the program has lost contact with the user */
|| program_state.done_hup
#endif
) {
somebody_can_move = FALSE;
break;
}
nmtmp = mtmp->nmon;
/* one dead monster needs to perform a move after death: vault
guard whose temporary corridor is still on the map; live
guards who have led the hero back to civilization get moved
off the map too; gd_move() decides whether the temporary
corridor can be removed and guard discarded (via clearing
mon->isgd flag so that dmonsfree() will get rid of mon) */
if (mtmp->isgd && !mtmp->mx) {
/* parked at <0,0>; eventually isgd should get set to false */
if (monstermoves > mtmp->mlstmv) {
(void) gd_move(mtmp);
mtmp->mlstmv = monstermoves;
}
continue;
}
if (DEADMONSTER(mtmp))
continue;
/* Find a monster that we have not treated yet. */
if (mtmp->movement < NORMAL_SPEED)
continue;
mtmp->movement -= NORMAL_SPEED;
if (mtmp->movement >= NORMAL_SPEED)
somebody_can_move = TRUE;
if (vision_full_recalc)
vision_recalc(0); /* vision! */
/* reset obj bypasses before next monster moves */
if (context.bypasses)
clear_bypasses();
clear_splitobjs();
if (minliquid(mtmp))
continue;
/* after losing equipment, try to put on replacement */
if (mtmp->misc_worn_check & I_SPECIAL) {
long oldworn;
mtmp->misc_worn_check &= ~I_SPECIAL;
oldworn = mtmp->misc_worn_check;
m_dowear(mtmp, FALSE);
if (mtmp->misc_worn_check != oldworn || !mtmp->mcanmove)
continue;
}
if (is_hider(mtmp->data)) {
/* unwatched mimics and piercers may hide again [MRS] */
if (restrap(mtmp))
continue;
if (M_AP_TYPE(mtmp) == M_AP_FURNITURE
|| M_AP_TYPE(mtmp) == M_AP_OBJECT)
continue;
if (mtmp->mundetected)
continue;
} else if (mtmp->data->mlet == S_EEL && !mtmp->mundetected
&& (mtmp->mflee || distu(mtmp->mx, mtmp->my) > 2)
&& !canseemon(mtmp) && !rn2(4)) {
/* some eels end up stuck in isolated pools, where they
can't--or at least won't--move, so they never reach
their post-move chance to re-hide */
if (hideunder(mtmp))
continue;
}
/* continue if the monster died fighting */
if (Conflict && !mtmp->iswiz && mtmp->mcansee) {
/* Note:
* Conflict does not take effect in the first round.
* Therefore, A monster when stepping into the area will
* get to swing at you.
*
* The call to fightm() must be _last_. The monster might
* have died if it returns 1.
*/
if (couldsee(mtmp->mx, mtmp->my)
&& (distu(mtmp->mx, mtmp->my) <= BOLT_LIM * BOLT_LIM)
&& fightm(mtmp))
continue; /* mon might have died */
}
if (dochugw(mtmp)) /* otherwise just move the monster */
continue;
}
if (any_light_source())
vision_full_recalc = 1; /* in case a mon moved with a light source */
/* reset obj bypasses after last monster has moved */
if (context.bypasses)
clear_bypasses();
clear_splitobjs();
/* remove dead monsters; dead vault guard will be left at <0,0>
if temporary corridor out of vault hasn't been removed yet */
dmonsfree();
/* a monster may have levteleported player -dlc */
if (u.utotype) {
deferred_goto();
/* changed levels, so these monsters are dormant */
somebody_can_move = FALSE;
}
return somebody_can_move;
}
#define mstoning(obj) \
(ofood(obj) && (touch_petrifies(&mons[(obj)->corpsenm]) \
|| (obj)->corpsenm == PM_MEDUSA))
/*
* Maybe eat a metallic object (not just gold).
* Return value: 0 => nothing happened, 1 => monster ate something,
* 2 => monster died (it must have grown into a genocided form, but
* that can't happen at present because nothing which eats objects
* has young and old forms).
*/
int
meatmetal(mtmp)
register struct monst *mtmp;
{
register struct obj *otmp;
struct permonst *ptr;
int poly, grow, heal, mstone;
/* If a pet, eating is handled separately, in dog.c */
if (mtmp->mtame)
return 0;
/* Eats topmost metal object if it is there */
for (otmp = level.objects[mtmp->mx][mtmp->my]; otmp;
otmp = otmp->nexthere) {
/* Don't eat indigestible/choking/inappropriate objects */
if ((mtmp->data == &mons[PM_RUST_MONSTER] && !is_rustprone(otmp))
|| (otmp->otyp == AMULET_OF_STRANGULATION)
|| (otmp->otyp == RIN_SLOW_DIGESTION))
continue;
if (is_metallic(otmp) && !obj_resists(otmp, 5, 95)
&& touch_artifact(otmp, mtmp)) {
if (mtmp->data == &mons[PM_RUST_MONSTER] && otmp->oerodeproof) {
if (canseemon(mtmp) && flags.verbose) {
pline("%s eats %s!", Monnam(mtmp),
distant_name(otmp, doname));
}
/* The object's rustproofing is gone now */
otmp->oerodeproof = 0;
mtmp->mstun = 1;
if (canseemon(mtmp) && flags.verbose) {
pline("%s spits %s out in disgust!", Monnam(mtmp),
distant_name(otmp, doname));
}
} else {
if (cansee(mtmp->mx, mtmp->my) && flags.verbose)
pline("%s eats %s!", Monnam(mtmp),
distant_name(otmp, doname));
else if (flags.verbose)
You_hear("a crunching sound.");
mtmp->meating = otmp->owt / 2 + 1;
/* Heal up to the object's weight in hp */
if (mtmp->mhp < mtmp->mhpmax) {
mtmp->mhp += objects[otmp->otyp].oc_weight;
if (mtmp->mhp > mtmp->mhpmax)
mtmp->mhp = mtmp->mhpmax;
}
if (otmp == uball) {
unpunish();
delobj(otmp);
} else if (otmp == uchain) {
unpunish(); /* frees uchain */
} else {
poly = polyfodder(otmp);
grow = mlevelgain(otmp);
heal = mhealup(otmp);
mstone = mstoning(otmp);
delobj(otmp);
ptr = mtmp->data;
if (poly) {
if (newcham(mtmp, (struct permonst *) 0, FALSE, FALSE))
ptr = mtmp->data;
} else if (grow) {
ptr = grow_up(mtmp, (struct monst *) 0);
} else if (mstone) {
if (poly_when_stoned(ptr)) {
mon_to_stone(mtmp);
ptr = mtmp->data;
} else if (!resists_ston(mtmp)) {
if (canseemon(mtmp))
pline("%s turns to stone!", Monnam(mtmp));
monstone(mtmp);
ptr = (struct permonst *) 0;
}
} else if (heal) {
mtmp->mhp = mtmp->mhpmax;
}
if (!ptr)
return 2; /* it died */
}
/* Left behind a pile? */
if (rnd(25) < 3)
(void) mksobj_at(ROCK, mtmp->mx, mtmp->my, TRUE, FALSE);
newsym(mtmp->mx, mtmp->my);
return 1;
}
}
}
return 0;
}
/* monster eats a pile of objects */
int
meatobj(mtmp) /* for gelatinous cubes */
struct monst *mtmp;
{
struct obj *otmp, *otmp2;
struct permonst *ptr, *original_ptr = mtmp->data;
int poly, grow, heal, eyes, count = 0, ecount = 0;
char buf[BUFSZ];
buf[0] = '\0';
/* If a pet, eating is handled separately, in dog.c */
if (mtmp->mtame)
return 0;
/* eat organic objects, including cloth and wood, if present;
engulf others, except huge rocks and metal attached to player
[despite comment at top, doesn't assume that eater is a g.cube] */
for (otmp = level.objects[mtmp->mx][mtmp->my]; otmp; otmp = otmp2) {
otmp2 = otmp->nexthere;
/* touch sensitive items */
if (otmp->otyp == CORPSE && is_rider(&mons[otmp->corpsenm])) {
/* Rider corpse isn't just inedible; can't engulf it either */
(void) revive_corpse(otmp);
/* untouchable (or inaccessible) items */
} else if ((otmp->otyp == CORPSE
&& touch_petrifies(&mons[otmp->corpsenm])
&& !resists_ston(mtmp))
/* don't engulf boulders and statues or ball&chain */
|| otmp->oclass == ROCK_CLASS
|| otmp == uball || otmp == uchain
/* normally mtmp won't have stepped onto scare monster
scroll, but if it does, don't eat or engulf that
(note: scrolls inside eaten containers will still
become engulfed) */
|| otmp->otyp == SCR_SCARE_MONSTER) {
/* do nothing--neither eaten nor engulfed */