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/* Copyright (c) Stichting Mathematisch Centrum, Amsterdam, 1985. */
/* hack.worm.c - version 1.0.2 */
/* $FreeBSD: src/games/hack/hack.worm.c,v 1.4 1999/11/16 10:26:38 marcel Exp $ */
#include "hack.h"
#ifndef NOWORM
struct wseg *wsegs[32]; /* linked list, tail first */
struct wseg *wheads[32];
long wgrowtime[32];
static void remseg(struct wseg *);
bool
getwn(struct monst *mtmp)
{
int tmp;
for (tmp = 1; tmp < 32; tmp++)
if (!wsegs[tmp]) {
mtmp->wormno = tmp;
return (1);
}
return (0); /* level infested with worms */
}
/* called to initialize a worm unless cut in half */
void
initworm(struct monst *mtmp)
{
struct wseg *wtmp;
int tmp = mtmp->wormno;
if (!tmp)
return;
wheads[tmp] = wsegs[tmp] = wtmp = newseg();
wgrowtime[tmp] = 0;
wtmp->wx = mtmp->mx;
wtmp->wy = mtmp->my;
wtmp->nseg = 0;
}
void
worm_move(struct monst *mtmp)
{
struct wseg *wtmp, *whd;
int tmp = mtmp->wormno;
wtmp = newseg();
wtmp->wx = mtmp->mx;
wtmp->wy = mtmp->my;
wtmp->nseg = 0;
(whd = wheads[tmp])->nseg = wtmp;
wheads[tmp] = wtmp;
if (cansee(whd->wx, whd->wy)) {
unpmon(mtmp);
atl(whd->wx, whd->wy, '~');
whd->wdispl = 1;
} else
whd->wdispl = 0;
if (wgrowtime[tmp] <= moves) {
if (!wgrowtime[tmp])
wgrowtime[tmp] = moves + rnd(5);
else
wgrowtime[tmp] += 2 + rnd(15);
mtmp->mhpmax += 3;
mtmp->mhp += 3;
return;
}
whd = wsegs[tmp];
wsegs[tmp] = whd->nseg;
remseg(whd);
}
void
worm_nomove(struct monst *mtmp)
{
int tmp;
struct wseg *wtmp;
tmp = mtmp->wormno;
wtmp = wsegs[tmp];
if (wtmp == wheads[tmp])
return;
if (wtmp == NULL || wtmp->nseg == 0)
panic("worm_nomove?");
wsegs[tmp] = wtmp->nseg;
remseg(wtmp);
mtmp->mhp -= 3; /* mhpmax not changed ! */
}
void
wormdead(struct monst *mtmp)
{
int tmp = mtmp->wormno;
struct wseg *wtmp, *wtmp2;
if (!tmp)
return;
mtmp->wormno = 0;
for (wtmp = wsegs[tmp]; wtmp; wtmp = wtmp2) {
wtmp2 = wtmp->nseg;
remseg(wtmp);
}
wsegs[tmp] = NULL;
}
void
wormhit(struct monst *mtmp)
{
int tmp = mtmp->wormno;
struct wseg *wtmp;
if (!tmp) /* worm without tail */
return;
for (wtmp = wsegs[tmp]; wtmp; wtmp = wtmp->nseg)
hitu(mtmp, 1);
}
void
wormsee(unsigned int tmp)
{
struct wseg *wtmp = wsegs[tmp];
if (!wtmp)
panic("wormsee: wtmp==0");
for (; wtmp->nseg; wtmp = wtmp->nseg)
if (!cansee(wtmp->wx, wtmp->wy) && wtmp->wdispl) {
newsym(wtmp->wx, wtmp->wy);
wtmp->wdispl = 0;
}
}
void
pwseg(struct wseg *wtmp)
{
if (!wtmp->wdispl) {
atl(wtmp->wx, wtmp->wy, '~');
wtmp->wdispl = 1;
}
}
/* weptyp: uwep->otyp or 0 */
void
cutworm(struct monst *mtmp, xchar x, xchar y, uchar weptyp)
{
struct wseg *wtmp, *wtmp2;
struct monst *mtmp2;
int tmp, tmp2;
if (mtmp->mx == x && mtmp->my == y) /* hit headon */
return;
/* cutting goes best with axe or sword */
tmp = rnd(20);
if (weptyp == LONG_SWORD || weptyp == TWO_HANDED_SWORD ||
weptyp == AXE)
tmp += 5;
if (tmp < 12)
return;
/* if tail then worm just loses a tail segment */
tmp = mtmp->wormno;
wtmp = wsegs[tmp];
if (wtmp->wx == x && wtmp->wy == y) {
wsegs[tmp] = wtmp->nseg;
remseg(wtmp);
return;
}
/* cut the worm in two halves */
mtmp2 = newmonst(0);
*mtmp2 = *mtmp;
mtmp2->mxlth = mtmp2->mnamelth = 0;
/* sometimes the tail end dies */
if (rn2(3) || !getwn(mtmp2)) {
monfree(mtmp2);
tmp2 = 0;
} else {
tmp2 = mtmp2->wormno;
wsegs[tmp2] = wsegs[tmp];
wgrowtime[tmp2] = 0;
}
do {
if (wtmp->nseg->wx == x && wtmp->nseg->wy == y) {
if (tmp2)
wheads[tmp2] = wtmp;
wsegs[tmp] = wtmp->nseg->nseg;
remseg(wtmp->nseg);
wtmp->nseg = 0;
if (tmp2) {
pline("You cut the worm in half.");
mtmp2->mhpmax = mtmp2->mhp =
d(mtmp2->data->mlevel, 8);
mtmp2->mx = wtmp->wx;
mtmp2->my = wtmp->wy;
mtmp2->nmon = fmon;
fmon = mtmp2;
pmon(mtmp2);
} else {
pline("You cut off part of the worm's tail.");
remseg(wtmp);
}
mtmp->mhp /= 2;
return;
}
wtmp2 = wtmp->nseg;
if (!tmp2)
remseg(wtmp);
wtmp = wtmp2;
} while (wtmp->nseg);
panic("Cannot find worm segment");
}
static void
remseg(struct wseg *wtmp)
{
if (wtmp->wdispl)
newsym(wtmp->wx, wtmp->wy);
free(wtmp);
}
#endif /* NOWORM */
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